Fix K8s glue does not delete pending pods if the tasks they represent were aborted

clearml_agent/glue/k8s.py

@@ -37,7 +37,6 @@ from clearml_agent.helper.resource_monitor import ResourceMonitor
 from clearml_agent.interface.base import ObjectID
 
 
-
 class K8sIntegration(Worker):
     K8S_PENDING_QUEUE = "k8s_scheduler"
 
@@ -46,11 +45,11 @@ class K8sIntegration(Worker):
 
     KUBECTL_APPLY_CMD = "kubectl apply --namespace={namespace} -f"
 
-    KUBECTL_DELETE_CMD = "kubectl delete pods " \
-                         "-l={agent_label} " \
-                         "--field-selector=status.phase!=Pending,status.phase!=Running " \
-                         "--namespace={namespace} " \
-                         "--output name"
+    KUBECTL_CLEANUP_DELETE_CMD = "kubectl delete pods " \
+                                 "-l={agent_label} " \
+                                 "--field-selector=status.phase!=Pending,status.phase!=Running " \
+                                 "--namespace={namespace} " \
+                                 "--output name"
 
     BASH_INSTALL_SSH_CMD = [
         "apt-get update",
@@ -263,7 +262,7 @@ class K8sIntegration(Worker):
                 sleep(self._polling_interval)
                 continue
             pods = output_config.get('items', [])
-            task_ids = set()
+            task_id_to_details = dict()
             for pod in pods:
                 pod_name = pod.get('metadata', {}).get('name', None)
                 if not pod_name:
@@ -277,7 +276,7 @@ class K8sIntegration(Worker):
                 if not namespace:
                     continue
 
-                task_ids.add(task_id)
+                task_id_to_details[task_id] = (pod_name, namespace)
 
                 msg = None
 
@@ -337,8 +336,41 @@ class K8sIntegration(Worker):
                             )
                         )
 
+            if task_id_to_details:
+                try:
+                    result = self._session.get(
+                        service='tasks',
+                        action='get_all',
+                        json={"id": list(task_id_to_details), "status": ["stopped"], "only_fields": ["id"]},
+                        method=Request.def_method,
+                        async_enable=False,
+                    )
+                    aborted_task_ids = list(filter(None, (task.get("id") for task in result["tasks"])))
+
+                    for task_id in aborted_task_ids:
+                        pod_name, namespace = task_id_to_details.get(task_id)
+                        if not pod_name:
+                            self.log.error("Failed locating aborted task {} in pending pods list".format(task_id))
+                            continue
+                        self.log.info(
+                            "K8S Glue pods monitor: task {} was aborted by its pod {} is still pending, "
+                            "deleting pod".format(task_id, pod_name)
+                        )
+
+                        kubectl_cmd = "kubectl delete pod {pod_name} --output name {namespace}".format(
+                            namespace=f"--namespace={namespace}" if namespace else "", pod_name=pod_name,
+                        ).strip()
+                        self.log.debug("Deleting aborted task pending pod: {}".format(kubectl_cmd))
+                        output = stringify_bash_output(get_bash_output(kubectl_cmd))
+                        if not output:
+                            self.log.warning("K8S Glue pods monitor: failed deleting pod {}".format(pod_name))
+                except Exception as ex:
+                    self.log.warning(
+                        'K8S Glue pods monitor: failed checking aborted tasks for hanging pods: {}'.format(ex)
+                    )
+
             # clean up any last message for a task that wasn't seen as a pod
-            last_tasks_msgs = {k: v for k, v in last_tasks_msgs.items() if k in task_ids}
+            last_tasks_msgs = {k: v for k, v in last_tasks_msgs.items() if k in task_id_to_details}
 
             sleep(self._polling_interval)
 
@@ -612,6 +644,7 @@ class K8sIntegration(Worker):
                     "k8s-pod-number": pod_number,
                     "k8s-pod-label": labels[0],
                     "k8s-internal-pod-count": pod_count,
+                    "k8s-agent": self._get_agent_label(),
                 }
             )
 
@@ -779,7 +812,9 @@ class K8sIntegration(Worker):
             if time() - self._last_pod_cleanup_per_ns[namespace] < self._min_cleanup_interval_per_ns_sec:
                 # Do not try to cleanup the same namespace too quickly
                 continue
-            kubectl_cmd = self.KUBECTL_DELETE_CMD.format(namespace=namespace, agent_label=self._get_agent_label())
+            kubectl_cmd = self.KUBECTL_CLEANUP_DELETE_CMD.format(
+                namespace=namespace, agent_label=self._get_agent_label()
+            )
             self.log.debug("Deleting old/failed pods{} for ns {}: {}".format(
                 extra_msg or "", namespace, kubectl_cmd
             ))
@@ -796,6 +831,51 @@ class K8sIntegration(Worker):
                 self.log.error("Failed deleting old/failed pods for ns %s: %s", namespace, str(ex))
             finally:
                 self._last_pod_cleanup_per_ns[namespace] = time()
+
+        # Locate tasks belonging to deleted pods that are still marked as pending or running
+        tasks_to_abort = []
+        try:
+            task_ids = list(filter(None, (
+                pod_name[len(self.pod_name_prefix):].strip()
+                for pod_names in deleted_pods.values()
+                for pod_name in pod_names
+            )))
+            if task_ids:
+                result = self._session.get(
+                    service='tasks',
+                    action='get_all',
+                    json={"id": task_ids, "status": ["in_progress", "queued"], "only_fields": ["id", "status"]},
+                    method=Request.def_method,
+                )
+                tasks_to_abort = result["tasks"]
+        except Exception as ex:
+            self.log.warning('Failed getting running tasks for deleted pods: {}'.format(ex))
+
+        for task in tasks_to_abort:
+            task_id = task.get("id")
+            status = task.get("status")
+            if not task_id or not status:
+                self.log.warning('Failed getting task information: id={}, status={}'.format(task_id, status))
+                continue
+            try:
+                if status == "queued":
+                    self._session.get(
+                        service='tasks',
+                        action='dequeue',
+                        json={"task": task_id, "force": True, "status_reason": "Pod deleted (not pending or running)",
+                              "status_message": "Pod deleted by agent {}".format(self.worker_id or "unknown")},
+                        method=Request.def_method,
+                    )
+                self._session.get(
+                    service='tasks',
+                    action='failed',
+                    json={"task": task_id, "force": True, "status_reason": "Pod deleted (not pending or running)",
+                          "status_message": "Pod deleted by agent {}".format(self.worker_id or "unknown")},
+                    method=Request.def_method,
+                )
+            except Exception as ex:
+                self.log.warning('Failed setting task {} to status "failed": {}'.format(task_id, ex))
+
         return deleted_pods
 
     def run_tasks_loop(self, queues: List[Text], worker_params, **kwargs):