Write stack dump to os.TempDir() as well

John Howard · John Howard · commit 7718d060ebdd · 2019-04-18T09:26:11.000-07:00
Signed-off-by: John Howard &lt;jhoward@microsoft.com&gt;
diff --git a/cmd/containerd/command/main.go b/cmd/containerd/command/main.go
@@ -291,4 +291,14 @@ func dumpStacks() {
 	}
 	buf = buf[:stackSize]
 	logrus.Infof("=== BEGIN goroutine stack dump ===\n%s\n=== END goroutine stack dump ===", buf)
+
+	// Also write to file to aid gathering diagnostics
+	name := filepath.Join(os.TempDir(), fmt.Sprintf("containerd.%d.stacks.log", os.Getpid()))
+	f, err := os.Create(name)
+	if err != nil {
+		return
+	}
+	defer f.Close()
+	f.WriteString(string(buf))
+	logrus.Infof("goroutine stack dump written to %s", name)
 }
