Handling Pausing from freezer state

Signed-off-by: Rajasekaran <[email protected]>

freezer status

Signed-off-by: Rajasekaran <[email protected]>

Author: rajasec

libcontainer/container_linux.go

@@ -767,6 +767,23 @@ func (c *linuxContainer) updateState(process parentProcess) error {
 	return json.NewEncoder(f).Encode(state)
 }
 
+func (c *linuxContainer) checkFreezer() (Status, error) {
+	path := c.cgroupManager.GetPaths()["freezer"]
+	_, err := os.Stat(path)
+	if err != nil {
+		return Running, err
+	}
+	contents, err := ioutil.ReadFile(filepath.Join(path, "freezer.state"))
+	if err != nil {
+		return 0, newSystemError(err)
+	}
+	freezerstate := string(contents)
+	if strings.TrimSpace(freezerstate) == "FROZEN" {
+		return Paused, nil
+	}
+	return Running, nil
+}
+
 func (c *linuxContainer) currentStatus() (Status, error) {
 	if _, err := os.Stat(filepath.Join(c.root, "checkpoint")); err == nil {
 		return Checkpointed, nil
@@ -781,7 +798,13 @@ func (c *linuxContainer) currentStatus() (Status, error) {
 		}
 		return 0, newSystemError(err)
 	}
-	if c.config.Cgroups != nil && c.config.Cgroups.Freezer == configs.Frozen {
+	status, err := c.checkFreezer()
+	if err != nil {
+		if os.IsNotExist(err) {
+			return Running, nil
+		}
+	}
+	if status == Paused {
 		return Paused, nil
 	}
 	return Running, nil