Fix agent hang by reverting service discovery to systemctl

The D-Bus ListUnits call in discover_services_internal() was causing the agent to hang on startup. **Root cause:** - D-Bus ListUnits call with complex tuple destructuring hung indefinitely - Agent never completed first collection cycle - No collector output in logs **Fix:** - Revert discover_services_internal() to use systemctl list-units/list-unit-files - Keep D-Bus-based property queries (WorkingDirectory, MemoryCurrent, ExecStart) - Hybrid approach: systemctl for discovery, D-Bus for individual queries **External commands still used:** - systemctl list-units, list-unit-files (service discovery) - smartctl (SMART data) - sudo du (directory sizes) - nginx -T (config fallback) Version bump: 0.1.198 → 0.1.199
Replace all systemctl commands with zbus D-Bus API
2025-11-28 11:57:31 +01:00 · 2025-11-28 11:46:28 +01:00 · 2025-11-28 11:27:33 +01:00 · 2025-11-27 23:16:40 +01:00 · 2025-11-27 23:12:08 +01:00 · 2025-11-27 23:10:55 +01:00
14 changed files with 1614 additions and 557 deletions
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -156,6 +156,56 @@ Complete migration from string-based metrics to structured JSON data. Eliminates
 - ✅ Backward compatibility via bridge conversion to existing UI widgets
 - ✅ All string parsing bugs eliminated
 ### Cached Collector Architecture (🚧 PLANNED)
 **Problem:** Blocking collectors prevent timely ZMQ transmission, causing false "host offline" alerts.
 **Previous (Sequential Blocking):**
 ```
 Every 1 second:
  └─ collect_all_data() [BLOCKS for 2-10+ seconds]
      ├─ CPU (fast: 10ms)
      ├─ Memory (fast: 20ms)
      ├─ Disk SMART (slow: 3s per drive × 4 drives = 12s)
      ├─ Service disk usage (slow: 2-8s per service)
      └─ Docker (medium: 500ms)
  └─ send_via_zmq()  [Only after ALL collection completes]
 Result: If any collector takes >10s → "host offline" false alert
 ```
 **New (Cached Independent Collectors):**
 ```
 Shared Cache: Arc<RwLock<AgentData>>
 Background Collectors (independent async tasks):
 ├─ Fast collectors (CPU, RAM, Network)
 │   └─ Update cache every 1 second
 ├─ Medium collectors (Services, Docker)
 │   └─ Update cache every 5 seconds
 └─ Slow collectors (Disk usage, SMART data)
    └─ Update cache every 60 seconds
 ZMQ Sender (separate async task):
 Every 1 second:
  └─ Read current cache
  └─ Send via ZMQ [Always instant, never blocked]
 ```
 **Benefits:**
 - ✅ ZMQ sends every 1 second regardless of collector speed
 - ✅ No false "host offline" alerts from slow collectors
 - ✅ Different update rates for different metrics (CPU=1s, SMART=60s)
 - ✅ System stays responsive even with slow operations
 - ✅ Slow collectors can use longer timeouts without blocking
 **Implementation:**
 - Shared `AgentData` cache wrapped in `Arc<RwLock<>>`
 - Each collector spawned as independent tokio task
 - Collectors update their section of cache at their own rate
 - ZMQ sender reads cache every 1s and transmits
 - Stale data acceptable for slow-changing metrics (disk usage, SMART)
 ### Maintenance Mode
 - Agent checks for `/tmp/cm-maintenance` file before sending notifications
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,6 +1,5 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
 # This file is automatically generated by Cargo.
 version = 4
 [[package]]
@@ -104,6 +103,137 @@ dependencies = [
 "object",
 ]
 [[package]]
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 "futures-core",
 "pin-project-lite",
 ]
 [[package]]
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 "concurrent-queue",
 "event-listener-strategy",
 "futures-core",
 "pin-project-lite",
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 "windows-sys 0.61.2",
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 [[package]]
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 "async-signal",
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 "futures-lite",
 "rustix",
 ]
 [[package]]
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 dependencies = [
 "proc-macro2",
 "quote",
 "syn",
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 [[package]]
 name = "async-signal"
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 checksum = "43c070bbf59cd3570b6b2dd54cd772527c7c3620fce8be898406dd3ed6adc64c"
 dependencies = [
 "async-io",
 "async-lock",
 "atomic-waker",
 "cfg-if",
 "futures-core",
 "futures-io",
 "rustix",
 "signal-hook-registry",
 "slab",
 "windows-sys 0.61.2",
 ]
 [[package]]
 name = "async-task"
 version = "4.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b75356056920673b02621b35afd0f7dda9306d03c79a30f5c56c44cf256e3de"
 [[package]]
 name = "async-trait"
 version = "0.1.89"
@@ -115,6 +245,12 @@ dependencies = [
 "syn",
 ]
 [[package]]
 name = "atomic-waker"
 version = "1.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0"
 [[package]]
 name = "autocfg"
 version = "1.5.0"
@@ -145,12 +281,84 @@ version = "2.10.0"
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 checksum = "812e12b5285cc515a9c72a5c1d3b6d46a19dac5acfef5265968c166106e31dd3"
 [[package]]
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 checksum = "3078c7629b62d3f0439517fa394996acacc5cbc91c5a20d8c658e77abd503a71"
 dependencies = [
 "generic-array",
 ]
 [[package]]
 name = "blocking"
 version = "1.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e83f8d02be6967315521be875afa792a316e28d57b5a2d401897e2a7921b7f21"
 dependencies = [
 "async-channel",
 "async-task",
 "futures-io",
 "futures-lite",
 "piper",
 ]
 [[package]]
 name = "bollard"
 version = "0.17.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d41711ad46fda47cd701f6908e59d1bd6b9a2b7464c0d0aeab95c6d37096ff8a"
 dependencies = [
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 "bytes",
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 "futures-util",
 "hex",
 "http 1.4.0",
 "http-body-util",
 "hyper 1.8.1",
 "hyper-named-pipe",
 "hyper-util",
 "hyperlocal",
 "log",
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 "serde",
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 "serde_json",
 "serde_repr",
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 "thiserror 1.0.69",
 "tokio",
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 "tower-service",
 "url",
 "winapi",
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 [[package]]
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 version = "1.45.0-rc.26.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6d7c5415e3a6bc6d3e99eff6268e488fd4ee25e7b28c10f08fa6760bd9de16e4"
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 "serde_repr",
 "serde_with",
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 [[package]]
 name = "bumpalo"
 version = "3.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "46c5e41b57b8bba42a04676d81cb89e9ee8e859a1a66f80a5a72e1cb76b34d43"
 [[package]]
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 checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
 [[package]]
 name = "bytes"
 version = "1.11.0"
@@ -165,9 +373,9 @@ checksum = "df8670b8c7b9dae1793364eafadf7239c40d669904660c5960d74cfd80b46a53"
 [[package]]
 name = "cc"
-version = "1.2.46"
+version = "1.2.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b97463e1064cb1b1c1384ad0a0b9c8abd0988e2a91f52606c80ef14aadb63e36"
+checksum = "cd405d82c84ff7f35739f175f67d8b9fb7687a0e84ccdc78bd3568839827cf07"
 dependencies = [
 "find-msvc-tools",
 "jobserver",
@@ -191,6 +399,12 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
 [[package]]
 name = "cfg_aliases"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "613afe47fcd5fac7ccf1db93babcb082c5994d996f20b8b159f2ad1658eb5724"
 [[package]]
 name = "chrono"
 version = "0.4.42"
@@ -239,9 +453,9 @@ dependencies = [
 [[package]]
 name = "clap"
-version = "4.5.52"
+version = "4.5.53"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aa8120877db0e5c011242f96806ce3c94e0737ab8108532a76a3300a01db2ab8"
+checksum = "c9e340e012a1bf4935f5282ed1436d1489548e8f72308207ea5df0e23d2d03f8"
 dependencies = [
 "clap_builder",
 "clap_derive",
@@ -249,9 +463,9 @@ dependencies = [
 [[package]]
 name = "clap_builder"
-version = "4.5.52"
+version = "4.5.53"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "02576b399397b659c26064fbc92a75fede9d18ffd5f80ca1cd74ddab167016e1"
+checksum = "d76b5d13eaa18c901fd2f7fca939fefe3a0727a953561fefdf3b2922b8569d00"
 dependencies = [
 "anstream",
 "anstyle",
@@ -279,7 +493,7 @@ checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
 [[package]]
 name = "cm-dashboard"
-version = "0.1.191"
+version = "0.1.199"
 dependencies = [
 "anyhow",
 "chrono",
@@ -290,7 +504,7 @@ dependencies = [
 "ratatui",
 "serde",
 "serde_json",
- "thiserror",
+ "thiserror 1.0.69",
 "tokio",
 "toml",
 "tracing",
@@ -301,35 +515,42 @@ dependencies = [
 [[package]]
 name = "cm-dashboard-agent"
-version = "0.1.191"
+version = "0.1.199"
 dependencies = [
 "anyhow",
 "async-trait",
 "bollard",
 "chrono",
 "chrono-tz",
 "clap",
 "cm-dashboard-shared",
 "futures",
 "gethostname",
 "lettre",
 "libc",
 "netlink-packet-route",
 "nix 0.29.0",
 "reqwest",
 "rtnetlink",
 "serde",
 "serde_json",
- "thiserror",
+ "thiserror 1.0.69",
 "tokio",
 "toml",
 "tracing",
 "tracing-subscriber",
 "zbus",
 "zmq",
 ]
 [[package]]
 name = "cm-dashboard-shared"
-version = "0.1.191"
+version = "0.1.199"
 dependencies = [
 "chrono",
 "serde",
 "serde_json",
- "thiserror",
+ "thiserror 1.0.69",
 ]
 [[package]]
@@ -338,6 +559,15 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b05b61dc5112cbb17e4b6cd61790d9845d13888356391624cbe7e41efeac1e75"
 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4ca0197aee26d1ae37445ee532fefce43251d24cc7c166799f4d46817f1d3973"
 dependencies = [
 "crossbeam-utils",
 ]
 [[package]]
 name = "core-foundation"
 version = "0.9.4"
@@ -354,6 +584,15 @@ version = "0.8.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "773648b94d0e5d620f64f280777445740e61fe701025087ec8b57f45c791888b"
 [[package]]
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 "libc",
 ]
 [[package]]
 name = "crossbeam"
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@@ -435,6 +674,36 @@ dependencies = [
 "winapi",
 ]
 [[package]]
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 checksum = "78c8292055d1c1df0cce5d180393dc8cce0abec0a7102adb6c7b1eef6016d60a"
 dependencies = [
 "generic-array",
 "typenum",
 ]
 [[package]]
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 dependencies = [
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 "serde_core",
 ]
 [[package]]
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 dependencies = [
 "block-buffer",
 "crypto-common",
 ]
 [[package]]
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@@ -457,6 +726,12 @@ dependencies = [
 "syn",
 ]
 [[package]]
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 [[package]]
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@@ -488,6 +763,33 @@ dependencies = [
 "cfg-if",
 ]
 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "66b7e2430c6dff6a955451e2cfc438f09cea1965a9d6f87f7e3b90decc014099"
 [[package]]
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 "serde",
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 ]
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@@ -504,6 +806,27 @@ dependencies = [
 "windows-sys 0.61.2",
 ]
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 version = "5.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e13b66accf52311f30a0db42147dadea9850cb48cd070028831ae5f5d4b856ab"
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 dependencies = [
 "event-listener",
 "pin-project-lite",
 ]
 [[package]]
 name = "fastrand"
 version = "2.3.0"
@@ -552,6 +875,21 @@ dependencies = [
 "percent-encoding",
 ]
 [[package]]
 name = "futures"
 version = "0.3.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "65bc07b1a8bc7c85c5f2e110c476c7389b4554ba72af57d8445ea63a576b0876"
 dependencies = [
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 "futures-core",
 "futures-executor",
 "futures-io",
 "futures-sink",
 "futures-task",
 "futures-util",
 ]
 [[package]]
 name = "futures-channel"
 version = "0.3.31"
@@ -559,6 +897,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2dff15bf788c671c1934e366d07e30c1814a8ef514e1af724a602e8a2fbe1b10"
 dependencies = [
 "futures-core",
 "futures-sink",
 ]
 [[package]]
@@ -567,12 +906,47 @@ version = "0.3.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "05f29059c0c2090612e8d742178b0580d2dc940c837851ad723096f87af6663e"
 [[package]]
 name = "futures-executor"
 version = "0.3.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1e28d1d997f585e54aebc3f97d39e72338912123a67330d723fdbb564d646c9f"
 dependencies = [
 "futures-core",
 "futures-task",
 "futures-util",
 ]
 [[package]]
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 version = "0.3.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9e5c1b78ca4aae1ac06c48a526a655760685149f0d465d21f37abfe57ce075c6"
 [[package]]
 name = "futures-lite"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f78e10609fe0e0b3f4157ffab1876319b5b0db102a2c60dc4626306dc46b44ad"
 dependencies = [
 "fastrand",
 "futures-core",
 "futures-io",
 "parking",
 "pin-project-lite",
 ]
 [[package]]
 name = "futures-macro"
 version = "0.3.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "162ee34ebcb7c64a8abebc059ce0fee27c2262618d7b60ed8faf72fef13c3650"
 dependencies = [
 "proc-macro2",
 "quote",
 "syn",
 ]
 [[package]]
 name = "futures-sink"
 version = "0.3.31"
@@ -591,8 +965,11 @@ version = "0.3.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9fa08315bb612088cc391249efdc3bc77536f16c91f6cf495e6fbe85b20a4a81"
 dependencies = [
 "futures-channel",
 "futures-core",
 "futures-io",
 "futures-macro",
 "futures-sink",
 "futures-task",
 "memchr",
 "pin-project-lite",
@@ -600,6 +977,16 @@ dependencies = [
 "slab",
 ]
 [[package]]
 name = "generic-array"
 version = "0.14.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
 dependencies = [
 "typenum",
 "version_check",
 ]
 [[package]]
 name = "gethostname"
 version = "0.4.3"
@@ -610,6 +997,17 @@ dependencies = [
 "windows-targets 0.48.5",
 ]
 [[package]]
 name = "getrandom"
 version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "335ff9f135e4384c8150d6f27c6daed433577f86b4750418338c01a1a2528592"
 dependencies = [
 "cfg-if",
 "libc",
 "wasi",
 ]
 [[package]]
 name = "getrandom"
 version = "0.3.4"
@@ -633,14 +1031,20 @@ dependencies = [
 "futures-core",
 "futures-sink",
 "futures-util",
- "http",
+ "http 0.2.12",
- "indexmap",
+ "indexmap 2.12.1",
 "slab",
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@@ -664,9 +1068,9 @@ dependencies = [
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@@ -691,6 +1107,16 @@ dependencies = [
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@@ -698,7 +1124,30 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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@@ -725,8 +1174,8 @@ dependencies = [
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@@ -738,6 +1187,43 @@ dependencies = [
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@@ -1084,6 +1628,94 @@ dependencies = [
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@@ -1285,6 +1964,30 @@ dependencies = [
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 ]
 [[package]]
 name = "time"
 version = "0.3.44"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "91e7d9e3bb61134e77bde20dd4825b97c010155709965fedf0f49bb138e52a9d"
 dependencies = [
 "deranged",
 "itoa",
 "num-conv",
 "powerfmt",
 "serde",
 "time-core",
 "time-macros",
 ]
 [[package]]
 name = "time-core"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "40868e7c1d2f0b8d73e4a8c7f0ff63af4f6d19be117e90bd73eb1d62cf831c6b"
 [[package]]
 name = "time-macros"
 version = "0.2.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "30cfb0125f12d9c277f35663a0a33f8c30190f4e4574868a330595412d34ebf3"
 dependencies = [
 "num-conv",
 "time-core",
 ]
 [[package]]
 name = "tinystr"
 version = "0.8.2"
@@ -1910,8 +2787,8 @@ checksum = "dc1beb996b9d83529a9e75c17a1686767d148d70663143c7854d8b4a09ced362"
 dependencies = [
 "serde",
 "serde_spanned",
- "toml_datetime",
+ "toml_datetime 0.6.11",
- "toml_edit",
+ "toml_edit 0.22.27",
 ]
 [[package]]
@@ -1923,20 +2800,50 @@ dependencies = [
 "serde",
 ]
 [[package]]
 name = "toml_datetime"
 version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f2cdb639ebbc97961c51720f858597f7f24c4fc295327923af55b74c3c724533"
 dependencies = [
 "serde_core",
 ]
 [[package]]
 name = "toml_edit"
 version = "0.22.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "41fe8c660ae4257887cf66394862d21dbca4a6ddd26f04a3560410406a2f819a"
 dependencies = [
- "indexmap",
+ "indexmap 2.12.1",
 "serde",
 "serde_spanned",
- "toml_datetime",
+ "toml_datetime 0.6.11",
 "toml_write",
 "winnow",
 ]
 [[package]]
 name = "toml_edit"
 version = "0.23.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6485ef6d0d9b5d0ec17244ff7eb05310113c3f316f2d14200d4de56b3cb98f8d"
 dependencies = [
 "indexmap 2.12.1",
 "toml_datetime 0.7.3",
 "toml_parser",
 "winnow",
 ]
 [[package]]
 name = "toml_parser"
 version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c0cbe268d35bdb4bb5a56a2de88d0ad0eb70af5384a99d648cd4b3d04039800e"
 dependencies = [
 "winnow",
 ]
 [[package]]
 name = "toml_write"
 version = "0.1.2"
@@ -1962,9 +2869,9 @@ dependencies = [
 [[package]]
 name = "tracing-attributes"
-version = "0.1.30"
+version = "0.1.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "81383ab64e72a7a8b8e13130c49e3dab29def6d0c7d76a03087b3cf71c5c6903"
+checksum = "7490cfa5ec963746568740651ac6781f701c9c5ea257c58e057f3ba8cf69e8da"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -1973,9 +2880,9 @@ dependencies = [
 [[package]]
 name = "tracing-core"
-version = "0.1.34"
+version = "0.1.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b9d12581f227e93f094d3af2ae690a574abb8a2b9b7a96e7cfe9647b2b617678"
+checksum = "7a04e24fab5c89c6a36eb8558c9656f30d81de51dfa4d3b45f26b21d61fa0a6c"
 dependencies = [
 "once_cell",
 "valuable",
@@ -2016,6 +2923,23 @@ version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b"
 [[package]]
 name = "typenum"
 version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "562d481066bde0658276a35467c4af00bdc6ee726305698a55b86e61d7ad82bb"
 [[package]]
 name = "uds_windows"
 version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "89daebc3e6fd160ac4aa9fc8b3bf71e1f74fbf92367ae71fb83a037e8bf164b9"
 dependencies = [
 "memoffset",
 "tempfile",
 "winapi",
 ]
 [[package]]
 name = "unicode-ident"
 version = "1.0.22"
@@ -2513,9 +3437,9 @@ checksum = "d6bbff5f0aada427a1e5a6da5f1f98158182f26556f345ac9e04d36d0ebed650"
 [[package]]
 name = "winnow"
-version = "0.7.13"
+version = "0.7.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "21a0236b59786fed61e2a80582dd500fe61f18b5dca67a4a067d0bc9039339cf"
+checksum = "5a5364e9d77fcdeeaa6062ced926ee3381faa2ee02d3eb83a5c27a8825540829"
 dependencies = [
 "memchr",
 ]
@@ -2542,6 +3466,16 @@ version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9edde0db4769d2dc68579893f2306b26c6ecfbe0ef499b013d731b7b9247e0b9"
 [[package]]
 name = "xdg-home"
 version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ec1cdab258fb55c0da61328dc52c8764709b249011b2cad0454c72f0bf10a1f6"
 dependencies = [
 "libc",
 "windows-sys 0.59.0",
 ]
 [[package]]
 name = "yoke"
 version = "0.8.1"
@@ -2566,19 +3500,81 @@ dependencies = [
 ]
 [[package]]
-name = "zerocopy"
+name = "zbus"
-version = "0.8.27"
+version = "4.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0894878a5fa3edfd6da3f88c4805f4c8558e2b996227a3d864f47fe11e38282c"
+checksum = "bb97012beadd29e654708a0fdb4c84bc046f537aecfde2c3ee0a9e4b4d48c725"
 dependencies = [
 "async-broadcast",
 "async-executor",
 "async-fs",
 "async-io",
 "async-lock",
 "async-process",
 "async-recursion",
 "async-task",
 "async-trait",
 "blocking",
 "enumflags2",
 "event-listener",
 "futures-core",
 "futures-sink",
 "futures-util",
 "hex",
 "nix 0.29.0",
 "ordered-stream",
 "rand",
 "serde",
 "serde_repr",
 "sha1",
 "static_assertions",
 "tracing",
 "uds_windows",
 "windows-sys 0.52.0",
 "xdg-home",
 "zbus_macros",
 "zbus_names",
 "zvariant",
 ]
 [[package]]
 name = "zbus_macros"
 version = "4.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "267db9407081e90bbfa46d841d3cbc60f59c0351838c4bc65199ecd79ab1983e"
 dependencies = [
 "proc-macro-crate",
 "proc-macro2",
 "quote",
 "syn",
 "zvariant_utils",
 ]
 [[package]]
 name = "zbus_names"
 version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4b9b1fef7d021261cc16cba64c351d291b715febe0fa10dc3a443ac5a5022e6c"
 dependencies = [
 "serde",
 "static_assertions",
 "zvariant",
 ]
 [[package]]
 name = "zerocopy"
 version = "0.8.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4ea879c944afe8a2b25fef16bb4ba234f47c694565e97383b36f3a878219065c"
 dependencies = [
 "zerocopy-derive",
 ]
 [[package]]
 name = "zerocopy-derive"
-version = "0.8.27"
+version = "0.8.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "88d2b8d9c68ad2b9e4340d7832716a4d21a22a1154777ad56ea55c51a9cf3831"
+checksum = "cf955aa904d6040f70dc8e9384444cb1030aed272ba3cb09bbc4ab9e7c1f34f5"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -2670,3 +3666,40 @@ dependencies = [
 "system-deps",
 "zeromq-src",
 ]
 [[package]]
 name = "zvariant"
 version = "4.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2084290ab9a1c471c38fc524945837734fbf124487e105daec2bb57fd48c81fe"
 dependencies = [
 "endi",
 "enumflags2",
 "serde",
 "static_assertions",
 "zvariant_derive",
 ]
 [[package]]
 name = "zvariant_derive"
 version = "4.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "73e2ba546bda683a90652bac4a279bc146adad1386f25379cf73200d2002c449"
 dependencies = [
 "proc-macro-crate",
 "proc-macro2",
 "quote",
 "syn",
 "zvariant_utils",
 ]
 [[package]]
 name = "zvariant_utils"
 version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c51bcff7cc3dbb5055396bcf774748c3dab426b4b8659046963523cee4808340"
 dependencies = [
 "proc-macro2",
 "quote",
 "syn",
 ]
--- a/agent/Cargo.toml
+++ b/agent/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-agent"
-version = "0.1.192"
+version = "0.1.199"
 edition = "2021"
 [dependencies]
@@ -20,4 +20,17 @@ gethostname = { workspace = true }
 chrono-tz = "0.8"
 toml = { workspace = true }
 async-trait = "0.1"
-reqwest = { version = "0.11", features = ["json", "blocking"] }
+reqwest = { version = "0.11", features = ["json", "blocking"] }
 # Native system APIs
 nix = { version = "0.29", features = ["fs"] }
 rtnetlink = "0.14"
 netlink-packet-route = "0.19"
 futures = "0.3"
 libc = "0.2"
 # Docker API client
 bollard = "0.17"
 # D-Bus client for systemd
 zbus = "4.0"
--- a/agent/src/agent.rs
+++ b/agent/src/agent.rs
@@ -4,7 +4,7 @@ use std::time::Duration;
 use tokio::time::interval;
 use tracing::{debug, error, info};
-use crate::communication::{AgentCommand, ZmqHandler};
+use crate::communication::ZmqHandler;
 use crate::config::AgentConfig;
 use crate::collectors::{
    Collector,
@@ -134,12 +134,6 @@ impl Agent {
                    // NOTE: With structured data, we might need to implement status tracking differently
                    // For now, we skip this until status evaluation is migrated
                }
                // Handle incoming commands (check periodically)
                _ = tokio::time::sleep(Duration::from_millis(100)) => {
                    if let Err(e) = self.handle_commands().await {
                        error!("Error handling commands: {}", e);
                    }
                }
                _ = &mut shutdown_rx => {
                    info!("Shutdown signal received, stopping agent loop");
                    break;
@@ -259,36 +253,4 @@ impl Agent {
        Ok(())
    }
    /// Handle incoming commands from dashboard
    async fn handle_commands(&mut self) -> Result<()> {
        // Try to receive a command (non-blocking)
        if let Ok(Some(command)) = self.zmq_handler.try_receive_command() {
            info!("Received command: {:?}", command);
            match command {
                AgentCommand::CollectNow => {
                    info!("Received immediate collection request");
                    if let Err(e) = self.collect_and_broadcast().await {
                        error!("Failed to collect on demand: {}", e);
                    }
                }
                AgentCommand::SetInterval { seconds } => {
                    info!("Received interval change request: {}s", seconds);
                    // Note: This would require more complex handling to update the interval
                    // For now, just acknowledge
                }
                AgentCommand::ToggleCollector { name, enabled } => {
                    info!("Received collector toggle request: {} -> {}", name, enabled);
                    // Note: This would require more complex handling to enable/disable collectors
                    // For now, just acknowledge
                }
                AgentCommand::Ping => {
                    info!("Received ping command");
                    // Maybe send back a pong or status
                }
            }
        }
        Ok(())
    }
 }
--- a/agent/src/collectors/cpu.rs
+++ b/agent/src/collectors/cpu.rs
@@ -1,22 +1,25 @@
 use async_trait::async_trait;
-use cm_dashboard_shared::{AgentData, Status, HysteresisThresholds};
+use cm_dashboard_shared::{AgentData, Status, HysteresisThresholds, CpuData};
 use std::sync::RwLock;
 use std::time::Instant;
 use tracing::debug;
 use super::{utils, Collector, CollectorError};
 use crate::config::CpuConfig;
-/// Extremely efficient CPU metrics collector
+/// Extremely efficient CPU metrics collector with interval-based caching
 ///
 /// EFFICIENCY OPTIMIZATIONS:
 /// - Single /proc/loadavg read for all load metrics
 /// - Single /proc/stat read for CPU usage
 /// - Minimal string allocations
 /// - No process spawning
 /// - <0.1ms collection time target
 pub struct CpuCollector {
    load_thresholds: HysteresisThresholds,
    temperature_thresholds: HysteresisThresholds,
    config: CpuConfig,
    state: RwLock<CpuCacheState>,
 }
 #[derive(Debug, Clone)]
 struct CpuCacheState {
    last_collection: Option<Instant>,
    cached_data: CpuData,
 }
 impl CpuCollector {
@@ -26,15 +29,39 @@ impl CpuCollector {
            config.load_warning_threshold,
            config.load_critical_threshold,
        );
-        
+
        let temperature_thresholds = HysteresisThresholds::new(
            config.temperature_warning_threshold,
            config.temperature_critical_threshold,
        );
-        
+
        Self {
            load_thresholds,
            temperature_thresholds,
            config,
            state: RwLock::new(CpuCacheState {
                last_collection: None,
                cached_data: CpuData {
                    load_1min: 0.0,
                    load_5min: 0.0,
                    load_15min: 0.0,
                    frequency_mhz: 0.0,
                    temperature_celsius: None,
                    load_status: Status::Unknown,
                    temperature_status: Status::Unknown,
                },
            }),
        }
    }
    fn should_update_cache(&self) -> bool {
        let state = self.state.read().unwrap();
        match state.last_collection {
            None => true,
            Some(last) => {
                let cache_duration = std::time::Duration::from_secs(self.config.interval_seconds);
                last.elapsed() > cache_duration
            }
        }
    }
@@ -156,6 +183,14 @@ impl CpuCollector {
 #[async_trait]
 impl Collector for CpuCollector {
    async fn collect_structured(&self, agent_data: &mut AgentData) -> Result<(), CollectorError> {
        // Check if cache is valid
        if !self.should_update_cache() {
            let state = self.state.read().unwrap();
            agent_data.system.cpu = state.cached_data.clone();
            debug!("Using cached CPU data (interval: {}s)", self.config.interval_seconds);
            return Ok(());
        }
        debug!("Collecting CPU metrics");
        let start = std::time::Instant::now();
@@ -187,6 +222,11 @@ impl Collector for CpuCollector {
            Status::Unknown
        };
        // Update cache
        let mut state = self.state.write().unwrap();
        state.last_collection = Some(Instant::now());
        state.cached_data = agent_data.system.cpu.clone();
        Ok(())
    }
 }
--- a/agent/src/collectors/disk.rs
+++ b/agent/src/collectors/disk.rs
@@ -6,6 +6,7 @@ use crate::config::DiskConfig;
 use std::process::Command;
 use std::time::Instant;
 use std::collections::HashMap;
 use std::sync::RwLock;
 use tracing::debug;
 use super::{Collector, CollectorError};
@@ -14,6 +15,19 @@ use super::{Collector, CollectorError};
 pub struct DiskCollector {
    config: DiskConfig,
    temperature_thresholds: HysteresisThresholds,
    /// Cached state with thread-safe interior mutability
    state: RwLock<DiskCacheState>,
 }
 /// Internal state for disk caching
 #[derive(Debug, Clone)]
 struct DiskCacheState {
    /// Last collection time for performance tracking
    last_collection: Option<Instant>,
    /// Cached drive data
    cached_drives: Vec<DriveData>,
    /// Cached pool data
    cached_pools: Vec<PoolData>,
 }
 /// A physical drive with its filesystems
@@ -58,10 +72,17 @@ impl DiskCollector {
            config.temperature_warning_celsius,
            config.temperature_critical_celsius,
        );
-        
+
        let state = DiskCacheState {
            last_collection: None,
            cached_drives: Vec::new(),
            cached_pools: Vec::new(),
        };
        Self {
            config,
            temperature_thresholds,
            state: RwLock::new(state),
        }
    }
@@ -104,40 +125,70 @@ impl DiskCollector {
        self.populate_drives_data(&physical_drives, &smart_data, agent_data)?;
        self.populate_pools_data(&mergerfs_pools, &smart_data, agent_data)?;
        // Step 7: Update cache with fresh data
        {
            let mut state = self.state.write().unwrap();
            state.cached_drives = agent_data.system.storage.drives.clone();
            state.cached_pools = agent_data.system.storage.pools.clone();
            state.last_collection = Some(Instant::now());
        }
        let elapsed = start_time.elapsed();
        debug!("Storage collection completed in {:?}", elapsed);
        Ok(())
    }
-    /// Get block devices and their mount points using lsblk
+    /// Check if disk collection cache should be updated
    fn should_update_cache(&self) -> bool {
        let state = self.state.read().unwrap();
        match state.last_collection {
            None => true,
            Some(last) => {
                let cache_duration = std::time::Duration::from_secs(self.config.interval_seconds);
                last.elapsed() > cache_duration
            }
        }
    }
    /// Get cached disk data if available and fresh
    fn get_cached_data(&self) -> Option<(Vec<DriveData>, Vec<PoolData>)> {
        if !self.should_update_cache() {
            let state = self.state.read().unwrap();
            Some((state.cached_drives.clone(), state.cached_pools.clone()))
        } else {
            None
        }
    }
    /// Get block devices and their mount points by reading /proc/mounts
    async fn get_mount_devices(&self) -> Result<HashMap<String, String>, CollectorError> {
-        use super::run_command_with_timeout;
+        let content = std::fs::read_to_string("/proc/mounts")
        let mut cmd = Command::new("lsblk");
        cmd.args(&["-rn", "-o", "NAME,MOUNTPOINT"]);
        let output = run_command_with_timeout(cmd, 2).await
            .map_err(|e| CollectorError::SystemRead {
-                path: "block devices".to_string(),
+                path: "/proc/mounts".to_string(),
                error: e.to_string(),
            })?;
        let mut mount_devices = HashMap::new();
-        for line in String::from_utf8_lossy(&output.stdout).lines() {
+
        for line in content.lines() {
            let parts: Vec<&str> = line.split_whitespace().collect();
-            if parts.len() >= 2 {
+            if parts.len() >= 3 {
-                let device_name = parts[0];
+                let device = parts[0];
                let mount_point = parts[1];
-                
+                let fs_type = parts[2];
-                // Skip swap partitions and unmounted devices
+
-                if mount_point == "[SWAP]" || mount_point.is_empty() {
+                // Skip pseudo filesystems and fuse mounts
                if fs_type.starts_with("fuse") ||
                   matches!(fs_type, "proc" | "sysfs" | "tmpfs" | "devtmpfs" |
                           "devpts" | "cgroup" | "cgroup2" | "pstore" | "bpf" |
                           "tracefs" | "debugfs" | "securityfs" | "hugetlbfs" |
                           "mqueue" | "configfs" | "autofs") {
                    continue;
                }
-                
+
-                // Convert device name to full path
+                mount_devices.insert(mount_point.to_string(), device.to_string());
                let device_path = format!("/dev/{}", device_name);
                mount_devices.insert(mount_point.to_string(), device_path);
            }
        }
@@ -187,44 +238,20 @@ impl DiskCollector {
        Ok(())
    }
-    /// Get filesystem info for a single mount point
+    /// Get filesystem info for a single mount point using statvfs syscall
    fn get_filesystem_info(&self, mount_point: &str) -> Result<(u64, u64), CollectorError> {
-        let output = std::process::Command::new("timeout")
+        use nix::sys::statvfs::statvfs;
            .args(&["2", "df", "--block-size=1", mount_point])
            .output()
            .map_err(|e| CollectorError::SystemRead {
                path: format!("df {}", mount_point),
                error: e.to_string(),
            })?;
-        let output_str = String::from_utf8_lossy(&output.stdout);
+        let stat = statvfs(mount_point).map_err(|e| CollectorError::SystemRead {
-        let lines: Vec<&str> = output_str.lines().collect();
+            path: mount_point.to_string(),
-        
+            error: format!("statvfs failed: {}", e),
        if lines.len() < 2 {
            return Err(CollectorError::Parse {
                value: output_str.to_string(),
                error: "Expected at least 2 lines from df output".to_string(),
            });
        }
        // Parse the data line (skip header)
        let parts: Vec<&str> = lines[1].split_whitespace().collect();
        if parts.len() < 4 {
            return Err(CollectorError::Parse {
                value: lines[1].to_string(),
                error: "Expected at least 4 fields in df output".to_string(),
            });
        }
        let total_bytes: u64 = parts[1].parse().map_err(|e| CollectorError::Parse {
            value: parts[1].to_string(),
            error: format!("Failed to parse total bytes: {}", e),
        })?;
-        let used_bytes: u64 = parts[2].parse().map_err(|e| CollectorError::Parse {
+        // Calculate total and used bytes
-            value: parts[2].to_string(),
+        let block_size = stat.fragment_size() as u64;
-            error: format!("Failed to parse used bytes: {}", e),
+        let total_bytes = stat.blocks() as u64 * block_size;
-        })?;
+        let available_bytes = stat.blocks_available() as u64 * block_size;
        let used_bytes = total_bytes - available_bytes;
        Ok((total_bytes, used_bytes))
    }
@@ -760,32 +787,29 @@ impl DiskCollector {
        Ok((data_drives, parity_drives))
    }
-    /// Get drive information for a mount path
+    /// Get drive information for a mount path by reading /proc/mounts
    fn get_drive_info_for_path(&self, path: &str) -> anyhow::Result<PoolDrive> {
-        // Use lsblk to find the backing device with timeout
+        // Read /proc/mounts to find the backing device
-        let output = Command::new("timeout")
+        let content = std::fs::read_to_string("/proc/mounts")
-            .args(&["2", "lsblk", "-rn", "-o", "NAME,MOUNTPOINT"])
+            .map_err(|e| anyhow::anyhow!("Failed to read /proc/mounts: {}", e))?;
-            .output()
+
            .map_err(|e| anyhow::anyhow!("Failed to run lsblk: {}", e))?;
        let output_str = String::from_utf8_lossy(&output.stdout);
        let mut device = String::new();
-        
+
-        for line in output_str.lines() {
+        for line in content.lines() {
            let parts: Vec<&str> = line.split_whitespace().collect();
            if parts.len() >= 2 && parts[1] == path {
                device = parts[0].to_string();
                break;
            }
        }
-        
+
        if device.is_empty() {
            return Err(anyhow::anyhow!("Could not find device for path {}", path));
        }
-        
+
-        // Extract base device name (e.g., "sda1" -> "sda")
+        // Extract base device name (e.g., "/dev/sda1" -> "sda")
-        let base_device = self.extract_base_device(&format!("/dev/{}", device));
+        let base_device = self.extract_base_device(&device);
-        
+
        // Get temperature from SMART data if available
        let temperature = if let Ok(smart_data) = tokio::task::block_in_place(|| {
            tokio::runtime::Handle::current().block_on(self.get_smart_data(&base_device))
@@ -794,7 +818,7 @@ impl DiskCollector {
        } else {
            None
        };
-        
+
        Ok(PoolDrive {
            name: base_device,
            mount_point: path.to_string(),
@@ -838,7 +862,15 @@ impl DiskCollector {
 #[async_trait]
 impl Collector for DiskCollector {
    async fn collect_structured(&self, agent_data: &mut AgentData) -> Result<(), CollectorError> {
-        self.collect_storage_data(agent_data).await
+        // Use cached data if available and fresh
        if let Some((cached_drives, cached_pools)) = self.get_cached_data() {
            agent_data.system.storage.drives = cached_drives;
            agent_data.system.storage.pools = cached_pools;
            Ok(())
        } else {
            // Collect fresh data
            self.collect_storage_data(agent_data).await
        }
    }
 }
--- a/agent/src/collectors/memory.rs
+++ b/agent/src/collectors/memory.rs
@@ -95,62 +95,47 @@ impl MemoryCollector {
        Ok(())
    }
-    /// Populate tmpfs data into AgentData
+    /// Populate tmpfs data into AgentData using statvfs syscall
    async fn populate_tmpfs_data(&self, agent_data: &mut AgentData) -> Result<(), CollectorError> {
        use nix::sys::statvfs::statvfs;
        // Discover all tmpfs mount points
        let tmpfs_mounts = self.discover_tmpfs_mounts()?;
-        
+
        if tmpfs_mounts.is_empty() {
            debug!("No tmpfs mounts found to monitor");
            return Ok(());
        }
-        // Get usage data for all tmpfs mounts at once using df (with 2 second timeout)
+        // Get usage data for each tmpfs mount using statvfs syscall
-        let mut df_args = vec!["2", "df", "--output=target,size,used", "--block-size=1"];
+        for mount_point in tmpfs_mounts {
-        df_args.extend(tmpfs_mounts.iter().map(|s| s.as_str()));
+            match statvfs(mount_point.as_str()) {
                Ok(stat) => {
                    let block_size = stat.fragment_size() as u64;
                    let total_bytes = stat.blocks() as u64 * block_size;
                    let available_bytes = stat.blocks_available() as u64 * block_size;
                    let used_bytes = total_bytes - available_bytes;
-        let df_output = std::process::Command::new("timeout")
+                    if total_bytes == 0 {
-            .args(&df_args[..])
+                        continue;
-            .output()
+                    }
            .map_err(|e| CollectorError::SystemRead {
                path: "tmpfs mounts".to_string(),
                error: e.to_string(),
            })?;
-        let df_str = String::from_utf8_lossy(&df_output.stdout);
+                    let total_gb = total_bytes as f32 / (1024.0 * 1024.0 * 1024.0);
-        let df_lines: Vec<&str> = df_str.lines().skip(1).collect(); // Skip header
+                    let used_gb = used_bytes as f32 / (1024.0 * 1024.0 * 1024.0);
                    let usage_percent = (used_bytes as f32 / total_bytes as f32) * 100.0;
-        // Process each tmpfs mount
+                    // Add to tmpfs list
-        for (i, mount_point) in tmpfs_mounts.iter().enumerate() {
+                    agent_data.system.memory.tmpfs.push(TmpfsData {
-            if i >= df_lines.len() {
+                        mount: mount_point.clone(),
-                debug!("Not enough df output lines for tmpfs mount: {}", mount_point);
+                        usage_percent,
-                continue;
+                        used_gb,
                        total_gb,
                    });
                }
                Err(e) => {
                    debug!("Failed to get stats for tmpfs mount {}: {}", mount_point, e);
                }
            }
            let parts: Vec<&str> = df_lines[i].split_whitespace().collect();
            if parts.len() < 3 {
                debug!("Invalid df output for tmpfs mount: {}", mount_point);
                continue;
            }
            let total_bytes: u64 = parts[1].parse().unwrap_or(0);
            let used_bytes: u64 = parts[2].parse().unwrap_or(0);
            if total_bytes == 0 {
                continue;
            }
            let total_gb = total_bytes as f32 / (1024.0 * 1024.0 * 1024.0);
            let used_gb = used_bytes as f32 / (1024.0 * 1024.0 * 1024.0);
            let usage_percent = (used_bytes as f32 / total_bytes as f32) * 100.0;
            // Add to tmpfs list
            agent_data.system.memory.tmpfs.push(TmpfsData {
                mount: mount_point.clone(),
                usage_percent,
                used_gb,
                total_gb,
            });
        }
        // Sort tmpfs mounts by mount point for consistent display order
--- a/agent/src/collectors/network.rs
+++ b/agent/src/collectors/network.rs
@@ -1,7 +1,12 @@
 use async_trait::async_trait;
 use cm_dashboard_shared::{AgentData, NetworkInterfaceData, Status};
 use std::process::Command;
 use tracing::debug;
 use futures::stream::TryStreamExt;
 use rtnetlink::{new_connection, IpVersion};
 use netlink_packet_route::link::LinkAttribute;
 use netlink_packet_route::address::AddressAttribute;
 use netlink_packet_route::route::RouteAttribute;
 use std::net::IpAddr;
 use super::{Collector, CollectorError};
 use crate::config::NetworkConfig;
@@ -49,36 +54,52 @@ impl NetworkCollector {
        }
    }
-    /// Get the primary physical interface (the one with default route)
+    /// Get the primary physical interface (the one with default route) using rtnetlink
-    fn get_primary_physical_interface() -> Option<String> {
+    async fn get_primary_physical_interface() -> Option<String> {
-        match Command::new("timeout").args(["2", "ip", "route", "show", "default"]).output() {
+        let (connection, handle, _) = match new_connection() {
-            Ok(output) if output.status.success() => {
+            Ok(conn) => conn,
-                let output_str = String::from_utf8_lossy(&output.stdout);
+            Err(e) => {
-                // Parse: "default via 192.168.1.1 dev eno1 ..."
+                debug!("Failed to create netlink connection: {}", e);
-                for line in output_str.lines() {
+                return None;
-                    if line.starts_with("default") {
+            }
-                        if let Some(dev_pos) = line.find(" dev ") {
+        };
-                            let after_dev = &line[dev_pos + 5..];
+
-                            if let Some(space_pos) = after_dev.find(' ') {
+        tokio::spawn(connection);
-                                let interface = &after_dev[..space_pos];
+
-                                // Only return if it's a physical interface
+        // Get default route
-                                if Self::is_physical_interface(interface) {
+        let mut routes = handle.route().get(IpVersion::V4).execute();
-                                    return Some(interface.to_string());
+
-                                }
+        while let Ok(Some(route)) = routes.try_next().await {
            // Check if this is a default route (destination is 0.0.0.0/0)
            if route.header.destination_prefix_length == 0 {
                // Find the output interface (OIF) attribute
                if let Some(oif) = route.attributes.iter().find_map(|attr| {
                    if let RouteAttribute::Oif(index) = attr {
                        Some(*index)
                    } else {
                        None
                    }
                }) {
                    // Get interface name from index
                    let mut link = handle.link().get().match_index(oif).execute();
                    if let Ok(Some(link_msg)) = link.try_next().await {
                        if let Some(name) = link_msg.attributes.iter().find_map(|attr| {
                            if let LinkAttribute::IfName(n) = attr {
                                Some(n.to_string())
                            } else {
-                                // No space after interface name (end of line)
+                                None
-                                let interface = after_dev.trim();
+                            }
-                                if Self::is_physical_interface(interface) {
+                        }) {
-                                    return Some(interface.to_string());
+                            if Self::is_physical_interface(&name) {
-                                }
+                                return Some(name);
                            }
                        }
                    }
                }
                None
            }
            _ => None,
        }
        None
    }
    /// Parse VLAN configuration from /proc/net/vlan/config
@@ -103,102 +124,105 @@ impl NetworkCollector {
        vlan_map
    }
-    /// Collect network interfaces using ip command
+    /// Collect network interfaces using rtnetlink
    async fn collect_interfaces(&self) -> Vec<NetworkInterfaceData> {
        let mut interfaces = Vec::new();
        // Parse VLAN configuration
        let vlan_map = Self::parse_vlan_config();
-        match Command::new("timeout").args(["2", "ip", "-j", "addr"]).output() {
+        // Create netlink connection
-            Ok(output) if output.status.success() => {
+        let (connection, handle, _) = match new_connection() {
-                let json_str = String::from_utf8_lossy(&output.stdout);
+            Ok(conn) => conn,
            Err(e) => {
                debug!("Failed to create netlink connection: {}", e);
                return interfaces;
            }
        };
-                if let Ok(json_data) = serde_json::from_str::<serde_json::Value>(&json_str) {
+        tokio::spawn(connection);
                    if let Some(ifaces) = json_data.as_array() {
                        for iface in ifaces {
                            let name = iface["ifname"].as_str().unwrap_or("").to_string();
-                            // Skip loopback, empty names, and ifb* interfaces
+        // Get all links
-                            if name.is_empty() || name == "lo" || name.starts_with("ifb") {
+        let mut links = handle.link().get().execute();
                                continue;
                            }
-                            // Parse parent interface from @parent notation (e.g., lan@enp0s31f6)
+        while let Ok(Some(link)) = links.try_next().await {
-                            let (interface_name, parent_interface) = if let Some(at_pos) = name.find('@') {
+            // Get interface name
-                                let (child, parent) = name.split_at(at_pos);
+            let name = match link.attributes.iter().find_map(|attr| {
-                                (child.to_string(), Some(parent[1..].to_string()))
+                if let LinkAttribute::IfName(n) = attr {
-                            } else {
+                    Some(n.to_string())
-                                (name.clone(), None)
+                } else {
-                            };
+                    None
                }
            }) {
                Some(n) => n,
                None => continue,
            };
-                            let mut ipv4_addresses = Vec::new();
+            // Skip loopback and ifb interfaces
-                            let mut ipv6_addresses = Vec::new();
+            if name == "lo" || name.starts_with("ifb") {
                continue;
            }
-                            // Extract IP addresses
+            // Parse parent interface from @parent notation (e.g., lan@enp0s31f6)
-                            if let Some(addr_info) = iface["addr_info"].as_array() {
+            let (interface_name, parent_interface) = if let Some(at_pos) = name.find('@') {
-                                for addr in addr_info {
+                let (child, parent) = name.split_at(at_pos);
-                                    if let Some(family) = addr["family"].as_str() {
+                (child.to_string(), Some(parent[1..].to_string()))
-                                        if let Some(local) = addr["local"].as_str() {
+            } else {
-                                            match family {
+                (name.clone(), None)
-                                                "inet" => ipv4_addresses.push(local.to_string()),
+            };
-                                                "inet6" => {
+
-                                                    // Skip link-local IPv6 addresses (fe80::)
+            // Get IP addresses for this interface
-                                                    if !local.starts_with("fe80:") {
+            let mut ipv4_addresses = Vec::new();
-                                                        ipv6_addresses.push(local.to_string());
+            let mut ipv6_addresses = Vec::new();
-                                                    }
+
-                                                }
+            let mut addrs = handle.address().get().set_link_index_filter(link.header.index).execute();
-                                                _ => {}
+            while let Ok(Some(addr)) = addrs.try_next().await {
-                                            }
+                for nla in &addr.attributes {
-                                        }
+                    if let AddressAttribute::Address(ip) = nla {
-                                    }
+                        match ip {
                            IpAddr::V4(ipv4) => ipv4_addresses.push(ipv4.to_string()),
                            IpAddr::V6(ipv6) => {
                                // Skip link-local IPv6 addresses (fe80::)
                                if !ipv6.to_string().starts_with("fe80:") {
                                    ipv6_addresses.push(ipv6.to_string());
                                }
                            }
                            // Determine if physical and get status
                            let is_physical = Self::is_physical_interface(&interface_name);
                            // Only filter out virtual interfaces without IPs
                            // Physical interfaces should always be shown even if down/no IPs
                            if !is_physical && ipv4_addresses.is_empty() && ipv6_addresses.is_empty() {
                                continue;
                            }
                            let link_status = if is_physical {
                                Self::get_link_status(&name)
                            } else {
                                Status::Unknown  // Virtual interfaces don't have meaningful link status
                            };
                            // Look up VLAN ID from the map (use original name before @ parsing)
                            let vlan_id = vlan_map.get(&name).copied();
                            interfaces.push(NetworkInterfaceData {
                                name: interface_name,
                                ipv4_addresses,
                                ipv6_addresses,
                                is_physical,
                                link_status,
                                parent_interface,
                                vlan_id,
                            });
                        }
                    }
                }
            }
-            Err(e) => {
+
-                debug!("Failed to execute ip command: {}", e);
+            // Determine if physical
-            }
+            let is_physical = Self::is_physical_interface(&interface_name);
-            Ok(output) => {
+
-                debug!("ip command failed with status: {}", output.status);
+            // Only filter out virtual interfaces without IPs
            if !is_physical && ipv4_addresses.is_empty() && ipv6_addresses.is_empty() {
                continue;
            }
            let link_status = if is_physical {
                Self::get_link_status(&name)
            } else {
                Status::Unknown
            };
            // Look up VLAN ID
            let vlan_id = vlan_map.get(&name).copied();
            interfaces.push(NetworkInterfaceData {
                name: interface_name,
                ipv4_addresses,
                ipv6_addresses,
                is_physical,
                link_status,
                parent_interface,
                vlan_id,
            });
        }
-        // Assign primary physical interface as parent to virtual interfaces without explicit parent
+        // Assign primary physical interface as parent to virtual interfaces
-        let primary_interface = Self::get_primary_physical_interface();
+        if let Some(primary) = Self::get_primary_physical_interface().await {
        if let Some(primary) = primary_interface {
            for interface in interfaces.iter_mut() {
                // Only assign parent to virtual interfaces that don't already have one
                if !interface.is_physical && interface.parent_interface.is_none() {
                    interface.parent_interface = Some(primary.clone());
                }
--- a/agent/src/collectors/systemd.rs
+++ b/agent/src/collectors/systemd.rs
@@ -5,6 +5,9 @@ use std::process::Command;
 use std::sync::RwLock;
 use std::time::Instant;
 use tracing::{debug, warn};
 use bollard::Docker;
 use bollard::container::ListContainersOptions;
 use zbus::Connection;
 use super::{Collector, CollectorError};
 use crate::config::SystemdConfig;
@@ -74,7 +77,7 @@ impl SystemdCollector {
        debug!("Collecting systemd services metrics");
        // Get cached services (discovery only happens when needed)
-        let monitored_services = match self.get_monitored_services() {
+        let monitored_services = match self.get_monitored_services().await {
            Ok(services) => services,
            Err(e) => {
                debug!("Failed to get monitored services: {}", e);
@@ -94,7 +97,7 @@ impl SystemdCollector {
                    // Sub-service metrics for specific services (always include cached results)
                    if service_name.contains("nginx") && active_status == "active" {
-                        let nginx_sites = self.get_nginx_site_metrics();
+                        let nginx_sites = self.get_nginx_site_metrics().await;
                        for (site_name, latency_ms) in nginx_sites {
                            let site_status = if latency_ms >= 0.0 && latency_ms < self.config.nginx_latency_critical_ms {
                                "active"
@@ -119,7 +122,7 @@ impl SystemdCollector {
                    }
                    if service_name.contains("docker") && active_status == "active" {
-                        let docker_containers = self.get_docker_containers();
+                        let docker_containers = self.get_docker_containers().await;
                        for (container_name, container_status) in docker_containers {
                            // For now, docker containers have no additional metrics
                            // Future: could add memory_mb, cpu_percent, restart_count, etc.
@@ -134,7 +137,7 @@ impl SystemdCollector {
                        }
                        // Add Docker images
-                        let docker_images = self.get_docker_images();
+                        let docker_images = self.get_docker_images().await;
                        for (image_name, image_status, image_size_mb) in docker_images {
                            let mut metrics = Vec::new();
                            metrics.push(SubServiceMetric {
@@ -190,7 +193,7 @@ impl SystemdCollector {
    }
    /// Get monitored services, discovering them if needed or cache is expired
-    fn get_monitored_services(&self) -> Result<Vec<String>> {
+    async fn get_monitored_services(&self) -> Result<Vec<String>> {
        // Check if we need discovery without holding the lock
        let needs_discovery = {
            let state = self.state.read().unwrap();
@@ -205,7 +208,7 @@ impl SystemdCollector {
        if needs_discovery {
            debug!("Discovering systemd services (cache expired or first run)");
-            match self.discover_services_internal() {
+            match self.discover_services_internal().await {
                Ok((services, status_cache)) => {
                    if let Ok(mut state) = self.state.write() {
                        state.monitored_services = services.clone();
@@ -228,32 +231,40 @@ impl SystemdCollector {
    }
    /// Get nginx site metrics, checking them if cache is expired (like old working version)
-    fn get_nginx_site_metrics(&self) -> Vec<(String, f32)> {
+    async fn get_nginx_site_metrics(&self) -> Vec<(String, f32)> {
-        let mut state = self.state.write().unwrap();
+        // Check if we need to refresh (read lock)
-
+        let needs_refresh = {
-        // Check if we need to refresh nginx site metrics
+            let state = self.state.read().unwrap();
-        let needs_refresh = match state.last_nginx_check_time {
+            match state.last_nginx_check_time {
-            None => true, // First time
+                None => true,
-            Some(last_time) => {
+                Some(last_time) => {
-                let elapsed = last_time.elapsed().as_secs();
+                    let elapsed = last_time.elapsed().as_secs();
-                elapsed >= state.nginx_check_interval_seconds
+                    elapsed >= state.nginx_check_interval_seconds
                }
            }
        };
        if needs_refresh {
-            // Only check nginx sites if nginx service is active
+            // Check if nginx is active (read lock)
-            if state.monitored_services.iter().any(|s| s.contains("nginx")) {
+            let has_nginx = {
-                let fresh_metrics = self.get_nginx_sites_internal();
+                let state = self.state.read().unwrap();
                state.monitored_services.iter().any(|s| s.contains("nginx"))
            };
            if has_nginx {
                let fresh_metrics = self.get_nginx_sites_internal().await;
                let mut state = self.state.write().unwrap();
                state.nginx_site_metrics = fresh_metrics;
                state.last_nginx_check_time = Some(Instant::now());
            }
        }
        let state = self.state.read().unwrap();
        state.nginx_site_metrics.clone()
    }
-    /// Auto-discover interesting services to monitor
+    /// Auto-discover interesting services to monitor using systemctl
-    fn discover_services_internal(&self) -> Result<(Vec<String>, std::collections::HashMap<String, ServiceStatusInfo>)> {
+    async fn discover_services_internal(&self) -> Result<(Vec<String>, std::collections::HashMap<String, ServiceStatusInfo>)> {
        // First: Get all service unit files (with 3 second timeout)
        let unit_files_output = Command::new("timeout")
            .args(&["3", "systemctl", "list-unit-files", "--type=service", "--no-pager", "--plain"])
@@ -345,9 +356,9 @@ impl SystemdCollector {
        Ok((services, status_cache))
    }
-    /// Get service status from cache (if available) or fallback to systemctl
+    /// Get service status from D-Bus cache
    fn get_service_status(&self, service: &str) -> Result<(String, String)> {
-        // Try to get status from cache first
+        // Get status from D-Bus cache (populated by discover_services_internal)
        if let Ok(state) = self.state.read() {
            if let Some(cached_info) = state.service_status_cache.get(service) {
                let active_status = cached_info.active_state.clone();
@@ -361,20 +372,45 @@ impl SystemdCollector {
            }
        }
-        // Fallback to systemctl if not in cache (with 2 second timeout)
+        // Service not found in D-Bus cache - treat as inactive
-        let output = Command::new("timeout")
+        Ok(("inactive".to_string(), "LoadState=not-found\nActiveState=inactive\nSubState=dead".to_string()))
-            .args(&["2", "systemctl", "is-active", &format!("{}.service", service)])
+    }
            .output()?;
-        let active_status = String::from_utf8(output.stdout)?.trim().to_string();
+    /// Get a unit property via D-Bus
    async fn get_unit_property(&self, service_name: &str, property: &str) -> Option<zbus::zvariant::OwnedValue> {
        // Connect to system D-Bus
        let connection = Connection::system().await.ok()?;
-        // Get more detailed info (with 2 second timeout)
+        // Get systemd manager proxy
-        let output = Command::new("timeout")
+        let manager_proxy = zbus::Proxy::new(
-            .args(&["2", "systemctl", "show", &format!("{}.service", service), "--property=LoadState,ActiveState,SubState"])
+            &connection,
-            .output()?;
+            "org.freedesktop.systemd1",
            "/org/freedesktop/systemd1",
            "org.freedesktop.systemd1.Manager",
        ).await.ok()?;
-        let detailed_info = String::from_utf8(output.stdout)?;
+        // Get unit path for service
-        Ok((active_status, detailed_info))
+        let unit_name = format!("{}.service", service_name);
        let unit_path: zbus::zvariant::OwnedObjectPath = manager_proxy
            .call("GetUnit", &(unit_name,))
            .await
            .ok()?;
        // Get property using standard D-Bus Properties interface
        let prop_proxy = zbus::Proxy::new(
            &connection,
            "org.freedesktop.systemd1",
            unit_path.as_str(),
            "org.freedesktop.DBus.Properties",
        ).await.ok()?;
        // Try Service interface first, fallback to Unit interface
        // Get returns a Variant, we need to extract the inner value
        if let Ok(variant) = prop_proxy.call("Get", &("org.freedesktop.systemd1.Service", property)).await {
            return Some(variant);
        }
        prop_proxy.call("Get", &("org.freedesktop.systemd1.Unit", property)).await.ok()
    }
    /// Check if service name matches pattern (supports wildcards like nginx*)
@@ -430,21 +466,12 @@ impl SystemdCollector {
            return Ok(0.0);
        }
-        // No configured path - try to get WorkingDirectory from systemctl (with 2 second timeout)
+        // No configured path - try to get WorkingDirectory from D-Bus
-        let output = Command::new("timeout")
+        if let Some(value) = self.get_unit_property(service_name, "WorkingDirectory").await {
-            .args(&["2", "systemctl", "show", &format!("{}.service", service_name), "--property=WorkingDirectory"])
+            // WorkingDirectory is a string property - try to extract as string
-            .output()
+            if let Ok(dir_str) = <String>::try_from(value) {
-            .map_err(|e| CollectorError::SystemRead {
+                if !dir_str.is_empty() && dir_str != "/" && dir_str != "[not set]" {
-                path: format!("WorkingDirectory for {}", service_name),
+                    return Ok(self.get_directory_size(&dir_str).await.unwrap_or(0.0));
                error: e.to_string(),
            })?;
        let output_str = String::from_utf8_lossy(&output.stdout);
        for line in output_str.lines() {
            if line.starts_with("WorkingDirectory=") && !line.contains("[not set]") {
                let dir = line.strip_prefix("WorkingDirectory=").unwrap_or("");
                if !dir.is_empty() && dir != "/" {
                    return Ok(self.get_directory_size(dir).await.unwrap_or(0.0));
                }
            }
        }
@@ -507,27 +534,13 @@ impl SystemdCollector {
        }
    }
-    /// Get memory usage for a specific service
+    /// Get memory usage for a specific service via D-Bus
    async fn get_service_memory_usage(&self, service_name: &str) -> Result<f32, CollectorError> {
-        let output = Command::new("systemctl")
+        // Get MemoryCurrent property from D-Bus
-            .args(&["show", &format!("{}.service", service_name), "--property=MemoryCurrent"])
+        if let Some(value) = self.get_unit_property(service_name, "MemoryCurrent").await {
-            .output()
+            // MemoryCurrent is a u64 property (bytes) - try to extract
-            .map_err(|e| CollectorError::SystemRead {
+            if let Ok(memory_bytes) = <u64>::try_from(value) {
-                path: format!("memory usage for {}", service_name),
+                return Ok(memory_bytes as f32 / (1024.0 * 1024.0)); // Convert to MB
                error: e.to_string(),
            })?;
        let output_str = String::from_utf8_lossy(&output.stdout);
        for line in output_str.lines() {
            if line.starts_with("MemoryCurrent=") {
                if let Some(mem_str) = line.strip_prefix("MemoryCurrent=") {
                    if mem_str != "[not set]" {
                        if let Ok(memory_bytes) = mem_str.parse::<u64>() {
                            return Ok(memory_bytes as f32 / (1024.0 * 1024.0)); // Convert to MB
                        }
                    }
                }
            }
        }
@@ -541,7 +554,7 @@ impl SystemdCollector {
        match state.last_collection {
            None => true,
            Some(last) => {
-                let cache_duration = std::time::Duration::from_secs(30);
+                let cache_duration = std::time::Duration::from_secs(self.config.interval_seconds);
                last.elapsed() > cache_duration
            }
        }
@@ -558,11 +571,11 @@ impl SystemdCollector {
    }
    /// Get nginx sites with latency checks (internal - no caching)
-    fn get_nginx_sites_internal(&self) -> Vec<(String, f32)> {
+    async fn get_nginx_sites_internal(&self) -> Vec<(String, f32)> {
        let mut sites = Vec::new();
        // Discover nginx sites from configuration
-        let discovered_sites = self.discover_nginx_sites();
+        let discovered_sites = self.discover_nginx_sites().await;
        // Always add all discovered sites, even if checks fail (like old version)
        for (site_name, url) in &discovered_sites {
@@ -581,9 +594,9 @@ impl SystemdCollector {
    }
    /// Discover nginx sites from configuration
-    fn discover_nginx_sites(&self) -> Vec<(String, String)> {
+    async fn discover_nginx_sites(&self) -> Vec<(String, String)> {
        // Use the same approach as the old working agent: get nginx config from systemd
-        let config_content = match self.get_nginx_config_from_systemd() {
+        let config_content = match self.get_nginx_config_from_systemd().await {
            Some(content) => content,
            None => {
                debug!("Could not get nginx config from systemd, trying nginx -T fallback");
@@ -616,30 +629,20 @@ impl SystemdCollector {
        Some(String::from_utf8_lossy(&output.stdout).to_string())
    }
-    /// Get nginx config from systemd service definition (NixOS compatible)
+    /// Get nginx config from systemd service definition via D-Bus (NixOS compatible)
-    fn get_nginx_config_from_systemd(&self) -> Option<String> {
+    async fn get_nginx_config_from_systemd(&self) -> Option<String> {
-        let output = Command::new("systemctl")
+        // Get ExecStart property from D-Bus
-            .args(&["show", "nginx", "--property=ExecStart", "--no-pager"])
+        let value = self.get_unit_property("nginx", "ExecStart").await?;
            .output()
            .ok()?;
-        if !output.status.success() {
+        // ExecStart is a complex structure: array of (path, args, unclean_exit)
-            debug!("Failed to get nginx ExecStart from systemd");
+        // For our purposes, we need to extract the command line
-            return None;
+        let exec_start_str = format!("{:?}", value);
-        }
+        debug!("nginx ExecStart from D-Bus: {}", exec_start_str);
-        let stdout = String::from_utf8_lossy(&output.stdout);
+        // Extract config path from ExecStart structure
-        debug!("systemctl show nginx output: {}", stdout);
+        if let Some(config_path) = self.extract_config_path_from_exec_start(&exec_start_str) {
-
+            debug!("Extracted config path: {}", config_path);
-        // Parse ExecStart to extract -c config path
+            return std::fs::read_to_string(&config_path).ok();
        for line in stdout.lines() {
            if line.starts_with("ExecStart=") {
                debug!("Found ExecStart line: {}", line);
                if let Some(config_path) = self.extract_config_path_from_exec_start(line) {
                    debug!("Extracted config path: {}", config_path);
                    return std::fs::read_to_string(&config_path).ok();
                }
            }
        }
        None
@@ -781,94 +784,91 @@ impl SystemdCollector {
        }
    }
-    /// Get docker containers as sub-services
+    /// Get docker containers as sub-services using bollard API
-    fn get_docker_containers(&self) -> Vec<(String, String)> {
+    async fn get_docker_containers(&self) -> Vec<(String, String)> {
        let mut containers = Vec::new();
-        // Check if docker is available (cm-agent user is in docker group)
+        // Connect to Docker daemon
-        // Use -a to show ALL containers (running and stopped) with 3 second timeout
+        let docker = match Docker::connect_with_local_defaults() {
-        let output = Command::new("timeout")
+            Ok(d) => d,
-            .args(&["3", "docker", "ps", "-a", "--format", "{{.Names}},{{.Status}}"])
+            Err(e) => {
-            .output();
+                debug!("Failed to connect to Docker daemon: {}", e);
-
+                return containers;
-        let output = match output {
+            }
            Ok(out) if out.status.success() => out,
            _ => return containers, // Docker not available or failed
        };
-        let output_str = match String::from_utf8(output.stdout) {
+        // List all containers (running and stopped)
-            Ok(s) => s,
+        let list_options = Some(ListContainersOptions::<String> {
-            Err(_) => return containers,
+            all: true,
            ..Default::default()
        });
        let container_list = match docker.list_containers(list_options).await {
            Ok(list) => list,
            Err(e) => {
                debug!("Failed to list Docker containers: {}", e);
                return containers;
            }
        };
-        for line in output_str.lines() {
+        for container in container_list {
-            if line.trim().is_empty() {
+            // Get container name (remove leading slash if present)
-                continue;
+            let container_name = container.names
-            }
+                .and_then(|names| names.first().map(|n| n.trim_start_matches('/').to_string()))
                .unwrap_or_else(|| container.id.clone().unwrap_or_default());
-            let parts: Vec<&str> = line.split(',').collect();
+            // Map container state to service status
-            if parts.len() >= 2 {
+            let container_status = match container.state.as_deref() {
-                let container_name = parts[0].trim();
+                Some("running") => "active",
-                let status_str = parts[1].trim();
+                Some("exited") | Some("created") => "inactive",
                _ => "failed", // restarting, paused, dead, etc.
            };
-                let container_status = if status_str.contains("Up") {
+            containers.push((format!("docker_{}", container_name), container_status.to_string()));
                    "active"
                } else if status_str.contains("Exited") || status_str.contains("Created") {
                    "inactive" // Stopped/created containers are inactive
                } else {
                    "failed" // Other states (restarting, paused, dead) → failed
                };
                containers.push((format!("docker_{}", container_name), container_status.to_string()));
            }
        }
        containers
    }
-    /// Get docker images as sub-services
+    /// Get docker images as sub-services using bollard API
-    fn get_docker_images(&self) -> Vec<(String, String, f32)> {
+    async fn get_docker_images(&self) -> Vec<(String, String, f32)> {
        let mut images = Vec::new();
        // Check if docker is available (cm-agent user is in docker group) with 3 second timeout
        let output = Command::new("timeout")
            .args(&["3", "docker", "images", "--format", "{{.Repository}}:{{.Tag}},{{.Size}}"])
            .output();
-        let output = match output {
+        // Connect to Docker daemon
-            Ok(out) if out.status.success() => out,
+        let docker = match Docker::connect_with_local_defaults() {
-            Ok(_) => {
+            Ok(d) => d,
-                return images;
+            Err(e) => {
-            }
+                debug!("Failed to connect to Docker daemon: {}", e);
            Err(_) => {
                return images;
            }
        };
-        let output_str = match String::from_utf8(output.stdout) {
+        // List all images
-            Ok(s) => s,
+        let image_list = match docker.list_images::<String>(None).await {
-            Err(_) => return images,
+            Ok(list) => list,
            Err(e) => {
                debug!("Failed to list Docker images: {}", e);
                return images;
            }
        };
-        for line in output_str.lines() {
+        for image in image_list {
-            if line.trim().is_empty() {
+            // Get image name from repo tags
-                continue;
+            let image_names: Vec<String> = image.repo_tags
                .into_iter()
                .filter(|tag| !tag.contains("<none>"))
                .collect();
            if image_names.is_empty() {
                continue; // Skip untagged images
            }
-            let parts: Vec<&str> = line.split(',').collect();
+            // Get size in MB
-            if parts.len() >= 2 {
+            let size_mb = image.size as f32 / (1024.0 * 1024.0);
                let image_name = parts[0].trim();
                let size_str = parts[1].trim();
                // Skip <none>:<none> images (dangling images)
                if image_name.contains("<none>") {
                    continue;
                }
                // Parse size to MB (sizes come as "142MB", "1.5GB", "512kB", etc.)
                let size_mb = self.parse_docker_size(size_str);
            for image_name in image_names {
                images.push((
-                    image_name.to_string(),
+                    image_name,
                    "inactive".to_string(), // Images are informational - use inactive for neutral display
                    size_mb
                ));
@@ -877,34 +877,6 @@ impl SystemdCollector {
        images
    }
    /// Parse Docker size string to MB
    fn parse_docker_size(&self, size_str: &str) -> f32 {
        let size_upper = size_str.to_uppercase();
        // Extract numeric part and unit
        let mut num_str = String::new();
        let mut unit = String::new();
        for ch in size_upper.chars() {
            if ch.is_ascii_digit() || ch == '.' {
                num_str.push(ch);
            } else if ch.is_alphabetic() {
                unit.push(ch);
            }
        }
        let value: f32 = num_str.parse().unwrap_or(0.0);
        // Convert to MB
        match unit.as_str() {
            "KB" | "K" => value / 1024.0,
            "MB" | "M" => value,
            "GB" | "G" => value * 1024.0,
            "TB" | "T" => value * 1024.0 * 1024.0,
            _ => value, // Assume bytes if no unit
        }
    }
 }
 #[async_trait]
--- a/agent/src/communication/mod.rs
+++ b/agent/src/communication/mod.rs
@@ -5,10 +5,9 @@ use zmq::{Context, Socket, SocketType};
 use crate::config::ZmqConfig;
-/// ZMQ communication handler for publishing metrics and receiving commands
+/// ZMQ communication handler for publishing metrics
 pub struct ZmqHandler {
    publisher: Socket,
    command_receiver: Socket,
 }
 impl ZmqHandler {
@@ -26,20 +25,8 @@ impl ZmqHandler {
        publisher.set_sndhwm(1000)?; // High water mark for outbound messages
        publisher.set_linger(1000)?; // Linger time on close
        // Create command receiver socket (PULL socket to receive commands from dashboard)
        let command_receiver = context.socket(SocketType::PULL)?;
        let cmd_bind_address = format!("tcp://{}:{}", config.bind_address, config.command_port);
        command_receiver.bind(&cmd_bind_address)?;
        info!("ZMQ command receiver bound to {}", cmd_bind_address);
        // Set non-blocking mode for command receiver
        command_receiver.set_rcvtimeo(0)?; // Non-blocking receive
        command_receiver.set_linger(1000)?;
        Ok(Self {
            publisher,
            command_receiver,
        })
    }
@@ -65,36 +52,4 @@ impl ZmqHandler {
        Ok(())
    }
    /// Try to receive a command (non-blocking)
    pub fn try_receive_command(&self) -> Result<Option<AgentCommand>> {
        match self.command_receiver.recv_bytes(zmq::DONTWAIT) {
            Ok(bytes) => {
                debug!("Received command message ({} bytes)", bytes.len());
                let command: AgentCommand = serde_json::from_slice(&bytes)
                    .map_err(|e| anyhow::anyhow!("Failed to deserialize command: {}", e))?;
                debug!("Parsed command: {:?}", command);
                Ok(Some(command))
            }
            Err(zmq::Error::EAGAIN) => {
                // No message available (non-blocking)
                Ok(None)
            }
            Err(e) => Err(anyhow::anyhow!("ZMQ receive error: {}", e)),
        }
    }
 }
 /// Commands that can be sent to the agent
 #[derive(Debug, Clone, serde::Deserialize, serde::Serialize)]
 pub enum AgentCommand {
    /// Request immediate metric collection
    CollectNow,
    /// Change collection interval
    SetInterval { seconds: u64 },
    /// Enable/disable a collector
    ToggleCollector { name: String, enabled: bool },
    /// Request status/health check
    Ping,
 }
--- a/agent/src/config/mod.rs
+++ b/agent/src/config/mod.rs
@@ -20,7 +20,6 @@ pub struct AgentConfig {
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct ZmqConfig {
    pub publisher_port: u16,
    pub command_port: u16,
    pub bind_address: String,
    pub transmission_interval_seconds: u64,
    /// Heartbeat transmission interval in seconds for host connectivity detection
--- a/agent/src/config/validation.rs
+++ b/agent/src/config/validation.rs
@@ -7,14 +7,6 @@ pub fn validate_config(config: &AgentConfig) -> Result<()> {
        bail!("ZMQ publisher port cannot be 0");
    }
    if config.zmq.command_port == 0 {
        bail!("ZMQ command port cannot be 0");
    }
    if config.zmq.publisher_port == config.zmq.command_port {
        bail!("ZMQ publisher and command ports cannot be the same");
    }
    if config.zmq.bind_address.is_empty() {
        bail!("ZMQ bind address cannot be empty");
    }
--- a/dashboard/Cargo.toml
+++ b/dashboard/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard"
-version = "0.1.192"
+version = "0.1.199"
 edition = "2021"
 [dependencies]
--- a/shared/Cargo.toml
+++ b/shared/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-shared"
-version = "0.1.192"
+version = "0.1.199"
 edition = "2021"
 [dependencies]
Author	SHA1	Message	Date
Christoffer Martinsson	eab3f17428	Fix agent hang by reverting service discovery to systemctl All checks were successful Build and Release / build-and-release (push) Successful in 1m31s Details The D-Bus ListUnits call in discover_services_internal() was causing the agent to hang on startup. Root cause: - D-Bus ListUnits call with complex tuple destructuring hung indefinitely - Agent never completed first collection cycle - No collector output in logs Fix: - Revert discover_services_internal() to use systemctl list-units/list-unit-files - Keep D-Bus-based property queries (WorkingDirectory, MemoryCurrent, ExecStart) - Hybrid approach: systemctl for discovery, D-Bus for individual queries External commands still used: - systemctl list-units, list-unit-files (service discovery) - smartctl (SMART data) - sudo du (directory sizes) - nginx -T (config fallback) Version bump: 0.1.198 → 0.1.199	2025-11-28 11:57:31 +01:00
Christoffer Martinsson	7ad149bbe4	Replace all systemctl commands with zbus D-Bus API All checks were successful Build and Release / build-and-release (push) Successful in 1m31s Details Complete migration from systemctl subprocess calls to native D-Bus communication: Removed systemctl commands: - systemctl is-active (fallback) - use D-Bus cache from ListUnits - systemctl show --property=LoadState,ActiveState,SubState - use D-Bus cache - systemctl show --property=WorkingDirectory - use D-Bus Properties.Get - systemctl show --property=MemoryCurrent - use D-Bus Properties.Get - systemctl show nginx --property=ExecStart - use D-Bus Properties.Get Implementation details: - Added get_unit_property() helper for D-Bus property access - Made get_nginx_site_metrics() async to support D-Bus calls - Made get_nginx_sites_internal() async - Made discover_nginx_sites() async - Made get_nginx_config_from_systemd() async - Fixed RwLock guard Send issues by using scoped locks Remaining external commands: - smartctl (disk.rs) - No Rust alternative for SMART data - sudo du (systemd.rs) - Directory size measurement - nginx -T (systemd.rs) - Nginx config fallback - timeout hostname (nixos.rs) - Rare fallback only Version bump: 0.1.197 → 0.1.198	2025-11-28 11:46:28 +01:00
Christoffer Martinsson	b444c88ea0	Replace external commands with native Rust APIs All checks were successful Build and Release / build-and-release (push) Successful in 1m54s Details Significant performance improvements by eliminating subprocess spawning: - Replace 'ip' commands with rtnetlink for network interface discovery - Replace 'docker ps/images' with bollard Docker API client - Replace 'systemctl list-units' with zbus D-Bus for systemd interaction - Replace 'df' with statvfs() syscall for filesystem statistics - Replace 'lsblk' with /proc/mounts parsing Add interval-based caching to collectors: - DiskCollector now respects interval_seconds configuration - SystemdCollector now respects interval_seconds configuration - CpuCollector now respects interval_seconds configuration Remove unused command communication infrastructure: - Remove port 6131 ZMQ command receiver - Clean up unused AgentCommand types Dependencies added: - rtnetlink = "0.14" - netlink-packet-route = "0.19" - bollard = "0.17" - zbus = "4.0" - nix (fs features for statvfs)	2025-11-28 11:27:33 +01:00
Christoffer Martinsson	317cf76bd1	Bump version to v0.1.196 All checks were successful Build and Release / build-and-release (push) Successful in 1m19s Details	2025-11-27 23:16:40 +01:00
Christoffer Martinsson	0db1a165b9	Revert "Implement cached collector architecture with configurable timeouts" This reverts commit `2740de9b54`.	2025-11-27 23:12:08 +01:00
Christoffer Martinsson	3c2955376d	Revert "Fix ZMQ sender blocking - move to independent thread with try_read" This reverts commit `01e1f33b66`.	2025-11-27 23:10:55 +01:00
Christoffer Martinsson	f09ccabc7f	Revert "Fix data duplication in cached collector architecture" This reverts commit `14618c59c6`.	2025-11-27 23:09:40 +01:00
Christoffer Martinsson	43dd5a901a	Update CLAUDE.md with correct ZMQ sender architecture	2025-11-27 22:59:38 +01:00
Christoffer Martinsson	01e1f33b66	Fix ZMQ sender blocking - move to independent thread with try_read All checks were successful Build and Release / build-and-release (push) Successful in 1m21s Details CRITICAL FIX: The previous cached collector architecture still had ZMQ sending in the main event loop, where it could block waiting for RwLock when collectors were writing. This caused the 3-8 second delays you observed. Changes: - Move ZMQ publisher to dedicated std::thread (ZMQ sockets aren't thread-safe) - Use try_read() instead of read() to avoid blocking on write locks - Send previous data if cache is locked by collector - ZMQ now sends every 2s regardless of collector timing - Remove publisher from ZmqHandler (now only handles commands) Architecture: - Collectors: Independent tokio tasks updating shared cache - ZMQ Sender: Dedicated OS thread with its own publisher socket - Main Loop: Only handles commands and notifications This ensures ZMQ transmission is NEVER blocked by slow collectors. Bump version to v0.1.195	2025-11-27 22:56:58 +01:00
Christoffer Martinsson	ed6399b914	Bump version to v0.1.194 All checks were successful Build and Release / build-and-release (push) Successful in 1m20s Details	2025-11-27 22:46:17 +01:00
Christoffer Martinsson	14618c59c6	Fix data duplication in cached collector architecture Critical bug fix: Collectors were appending to Vecs instead of replacing them, causing duplicate entries with each collection cycle. Fixed by adding .clear() calls before populating: - Memory collector: tmpfs Vec (was showing 11+ duplicates) - Disk collector: drives and pools Vecs - Systemd collector: services Vec - Network collector: Already correct (assigns new Vec) This prevents the exponential growth of duplicate entries in the dashboard UI.	2025-11-27 22:45:44 +01:00
Christoffer Martinsson	2740de9b54	Implement cached collector architecture with configurable timeouts All checks were successful Build and Release / build-and-release (push) Successful in 1m20s Details Major architectural refactor to eliminate false "host offline" alerts: - Replace sequential blocking collectors with independent async tasks - Each collector runs at configurable interval and updates shared cache - ZMQ sender reads cache every 1-2s regardless of collector speed - Collector intervals: CPU/Memory (1-10s), Backup/NixOS (30-60s), Disk/Systemd (60-300s) All intervals now configurable via NixOS config: - collectors..interval_seconds (collection frequency per collector) - collectors..command_timeout_seconds (timeout for shell commands) - notifications.check_interval_seconds (status change detection rate) Command timeouts increased from hardcoded 2-3s to configurable 10-30s: - Disk collector: 30s (SMART operations, lsblk) - Systemd collector: 15s (systemctl, docker, du commands) - Network collector: 10s (ip route, ip addr) Benefits: - No false "offline" alerts when slow collectors take >10s - Different update rates for different metric types - Better resource management with longer timeouts - Full NixOS configuration control Bump version to v0.1.193	2025-11-27 22:37:20 +01:00
Christoffer Martinsson	37f2650200	Document cached collector architecture plan Add architectural plan for separating ZMQ sending from data collection to prevent false 'host offline' alerts caused by slow collectors. Key concepts: - Shared cache (Arc<RwLock<AgentData>>) - Independent async collector tasks with different update rates - ZMQ sender always sends every 1s from cache - Fast collectors (1s), medium (5s), slow (60s) - No blocking regardless of collector speed	2025-11-27 21:49:44 +01:00