Add stderr logging for Docker images command failure

Agent changes:
- Log stderr output when docker images command fails
- This will show the actual error message (e.g., permission denied, docker not found)
- Helps diagnose why docker images collection is failing

Updated to version 0.1.177

agent/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-agent"
-version = "0.1.175"
+version = "0.1.177"
 edition = "2021"
 
 [dependencies]

agent/src/collectors/systemd.rs

@@ -4,7 +4,7 @@ use cm_dashboard_shared::{AgentData, ServiceData, SubServiceData, SubServiceMetr
 use std::process::Command;
 use std::sync::RwLock;
 use std::time::Instant;
-use tracing::debug;
+use tracing::{debug, info};
 
 use super::{Collector, CollectorError};
 use crate::config::SystemdConfig;
@@ -118,10 +118,10 @@ impl SystemdCollector {
                     }
 
                     if service_name.contains("docker") && active_status == "active" {
-                        debug!("Collecting Docker sub-services for service: {}", service_name);
+                        info!("Collecting Docker sub-services for service: {}", service_name);
 
                         let docker_containers = self.get_docker_containers();
-                        debug!("Found {} Docker containers", docker_containers.len());
+                        info!("Found {} Docker containers", docker_containers.len());
                         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.
@@ -136,7 +136,7 @@ impl SystemdCollector {
 
                         // Add Docker images
                         let docker_images = self.get_docker_images();
-                        debug!("Found {} Docker images", docker_images.len());
+                        info!("Found {} Docker images", docker_images.len());
                         for (image_name, image_status, image_size) in docker_images {
                             let mut metrics = Vec::new();
                             metrics.push(SubServiceMetric {
@@ -152,7 +152,7 @@ impl SystemdCollector {
                             });
                         }
 
-                        debug!("Total Docker sub-services added: {}", sub_services.len());
+                        info!("Total Docker sub-services added: {}", sub_services.len());
                     }
 
                     // Create complete service data
@@ -824,7 +824,7 @@ impl SystemdCollector {
     fn get_docker_images(&self) -> Vec<(String, String, String)> {
         let mut images = Vec::new();
 
-        debug!("Collecting Docker images");
+        info!("Collecting Docker images");
 
         // Check if docker is available (use sudo for permissions)
         let output = Command::new("sudo")
@@ -834,11 +834,12 @@ impl SystemdCollector {
         let output = match output {
             Ok(out) if out.status.success() => out,
             Ok(out) => {
-                debug!("Docker images command failed with status: {}", out.status);
+                let stderr = String::from_utf8_lossy(&out.stderr);
+                info!("Docker images command failed with status: {}, stderr: {}", out.status, stderr);
                 return images;
             }
             Err(e) => {
-                debug!("Docker images command error: {}", e);
+                info!("Docker images command error: {}", e);
                 return images;
             }
         };

dashboard/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard"
-version = "0.1.175"
+version = "0.1.177"
 edition = "2021"
 
 [dependencies]

shared/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-shared"
-version = "0.1.175"
+version = "0.1.177"
 edition = "2021"
 
 [dependencies]