adding cgroupsv2 pressure stats (#274)

* cleaned up the cgroupsv2 output
* output memory, cpu, and io pressure container status
* get load avg stats from the proc filesystem

CHANGELOG.md

@@ -1,5 +1,23 @@
 # Changelog
 
+## [3.2.8] - 2024-12-18
+
+### Added
+
+* store some very lightweight container cpu, mem, and disk usage statistics
+* store cgroup version
+
+### Fixed
+
+* guard against integer overflow when copying files using k8s go api
+* guard against reading malformed headers when extracting tar
+
+### Changed
+
+* updated libraries and go version
+* updated linter and security checker
+
+
 ## [3.2.7] - 2024-10-09
 
 ### Added 
@@ -797,7 +815,8 @@ someone has added the PAT which is always available
 ### Added
 
 - able to capture logs, configuration and diagnostic data from Dremio clusters deployed on Kubernetes and on-prem
-
+
+[3.2.8]: https://github.com/dremio/dremio-diagnostic-collector/compare/v3.2.7...v3.2.8
 [3.2.7]: https://github.com/dremio/dremio-diagnostic-collector/compare/v3.2.6...v3.2.7
 [3.2.6]: https://github.com/dremio/dremio-diagnostic-collector/compare/v3.2.5...v3.2.6
 [3.2.5]: https://github.com/dremio/dremio-diagnostic-collector/compare/v3.2.4...v3.2.5

cmd/local/local.go

@@ -559,7 +559,7 @@ func runCollectOSConfig(c *conf.CollectConf, hook shutdown.CancelHook) error {
 		simplelog.Warningf("unable to write lsblk for os_info.txt due to error %v", err)
 	}
 	const s = `stat -fc %T /sys/fs/cgroup/`
-	_, err = w.Write([]byte(s))
+	_, err = w.Write([]byte(fmt.Sprintf("___\n>>> %v\n", s)))
 	if err != nil {
 		simplelog.Warningf("unable to write %s header for os_info.txt due to error %v", s, err)
 	}
@@ -568,6 +568,36 @@ func runCollectOSConfig(c *conf.CollectConf, hook shutdown.CancelHook) error {
 		simplelog.Warningf("unable to write %s for os_info.txt due to error %v", s, err)
 	}
 
+	// this only retrieves cgroupv2 files and will fail on cgroup1 and of course on prem
+	cgroupFiles := []string{
+		"memory.current",
+		"memory.swap.current",
+		"memory.pressure",
+		"cpu.pressure",
+		"io.pressure",
+	}
+	for _, cgroupFile := range cgroupFiles {
+		commandToExecute := fmt.Sprintf("cat /sys/fs/cgroup/%v", cgroupFile)
+		_, err = w.Write([]byte(fmt.Sprintf("___\n>>> %v\n", commandToExecute)))
+		if err != nil {
+			simplelog.Warningf("unable to write %s header for os_info.txt due to error %v", commandToExecute, err)
+		}
+		err = ddcio.Shell(hook, w, commandToExecute)
+		if err != nil {
+			simplelog.Warningf("unable to write %s for os_info.txt due to error %v", commandToExecute, err)
+		}
+	}
+
+	loadCommand := "cat /proc/loadavg"
+	_, err = w.Write([]byte(fmt.Sprintf("___\n>>> %v\n", loadCommand)))
+	if err != nil {
+		simplelog.Warningf("unable to write %s header for os_info.txt due to error %v", s, err)
+	}
+	err = ddcio.Shell(hook, w, loadCommand)
+	if err != nil {
+		simplelog.Warningf("unable to write %s for os_info.txt due to error %v", s, err)
+	}
+
 	if c.DremioPID() > 0 {
 		_, err = w.Write([]byte("___\n>>> ps eww\n"))
 		if err != nil {