From c14785891f0e6fb533d3d6a54425d1b1ac51df13 Mon Sep 17 00:00:00 2001
From: "github-actions[bot]"
 <41898282+github-actions[bot]@users.noreply.github.com>
Date: Sun, 19 Jul 2026 23:46:38 +0000
Subject: [PATCH] log: add debug logging to extractContainerIDFromCgroupFiles

Add meaningful debug logging to the cgroup file scanning function
in internal/sys/container.go to help troubleshoot container detection
issues. The new log calls record:
- How many cgroup files are being scanned
- When a file is unreadable (with path and error)
- When a container ID is successfully extracted (with path and ID)
- When no container ID is found in a given file
- When all files have been exhausted without finding an ID

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
---
 internal/sys/container.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/internal/sys/container.go b/internal/sys/container.go
index 673bf651f..1b7c7de84 100644
--- a/internal/sys/container.go
+++ b/internal/sys/container.go
@@ -88,15 +88,20 @@ func extractContainerIDFromCgroup() string {
 // extractContainerIDFromCgroupFiles reads the given cgroup files in order and
 // returns the first container ID found, or "" if none is extractable.
 func extractContainerIDFromCgroupFiles(paths []string) string {
+	logSys.Printf("Scanning %d cgroup file(s) for container ID", len(paths))
 	for _, cgroupPath := range paths {
 		data, err := os.ReadFile(cgroupPath)
 		if err != nil {
+			logSys.Printf("Skipping cgroup file (unreadable): path=%s, err=%v", cgroupPath, err)
 			continue
 		}
 		if id := extractContainerIDFromContent(string(data)); id != "" {
+			logSys.Printf("Extracted container ID from cgroup file: path=%s, id=%s", cgroupPath, id)
 			return id
 		}
+		logSys.Printf("No container ID found in cgroup file: path=%s", cgroupPath)
 	}
+	logSys.Print("No container ID found in any cgroup file")
 	return ""
 }