Add new DAG for VDU webhook alarms

Change-Id: Ie103bd94fc3042aed7687e3ab0883a1644cdfc14
Signed-off-by: aguilard <e.dah.tid@telefonica.com>

diff --git a/src/osm_ngsa/dags/vdu_alarm.py b/src/osm_ngsa/dags/vdu_alarm.py
new file mode 100644 (file)
index 0000000..9acabf1
--- /dev/null
+++ b/src/osm_ngsa/dags/vdu_alarm.py
@@ -0,0 +1,137 @@
+#######################################################################################
+# Copyright ETSI Contributors and Others.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#######################################################################################
+from datetime import datetime, timedelta
+import json
+import logging
+
+from airflow.decorators import dag, task
+from airflow.operators.python import get_current_context
+from osm_mon.core.common_db import CommonDbClient
+from osm_mon.core.config import Config
+import requests
+from requests.exceptions import ConnectionError, RequestException
+
+# Logging
+logger = logging.getLogger("airflow.task")
+
+
+@dag(
+    catchup=False,
+    default_args={
+        "depends_on_past": False,
+        "retries": 1,
+        "retry_delay": timedelta(seconds=15),
+    },
+    description="Webhook callback for VDU alarm from Prometheus AlertManager",
+    is_paused_upon_creation=False,
+    schedule_interval=None,
+    start_date=datetime(2022, 1, 1),
+    tags=["osm", "webhook"],
+)
+def vdu_alarm():
+    @task(task_id="main_task")
+    def main_task():
+        logger.debug("Running main task...")
+        # Read input parameters
+        context = get_current_context()
+        conf = context["dag_run"].conf
+        for alarm in conf["alerts"]:
+            logger.info("Alarm:")
+            status = alarm["status"]
+            logger.info(f"  status: {status}")
+            logger.info(f'  annotations: {alarm["annotations"]}')
+            logger.info(f'  startsAt: {alarm["startsAt"]}')
+            logger.info(f'  endsAt: {alarm["endsAt"]}')
+            logger.info(f'  labels: {alarm["labels"]}')
+            alertname = alarm["labels"].get("alertname")
+            # Check vdu_alarm alert type
+            if not alertname.startswith("vdu_alarm_"):
+                continue
+            config = Config()
+            common_db = CommonDbClient(config)
+            ns_id = alarm["labels"]["ns_id"]
+            vdu_id = alarm["labels"]["vdu_id"]
+            vnf_member_index = alarm["labels"]["vnf_member_index"]
+            # Searching alerting rule in MongoDB
+            logger.info(
+                f"Searching alarm rule in MongoDB: ns_id {ns_id}, "
+                f"vnf_member_index {vnf_member_index}, "
+                f"vdu_id {vdu_id}, "
+            )
+            alert = common_db.get_alert(
+                nsr_id=ns_id,
+                vnf_member_index=vnf_member_index,
+                vdu_id=vdu_id,
+                vdu_name=None,
+                action_type="vdu_alarm",
+            )
+            if alert:
+                logger.info("Found an alert rule:")
+                logger.info(alert)
+                if status == "firing":
+                    alarm_status = "alarm"
+                elif status == "resolved":
+                    alarm_status = "ok"
+                else:
+                    continue
+                # Update alert status
+                common_db.update_alert_status(
+                    uuid=alert["uuid"], alarm_status=alarm_status
+                )
+                if alarm_status in alert["action"]:
+                    urls = []
+                    for item in alert["action"][alarm_status]:
+                        urls.append(item["url"])
+                else:
+                    logger.info(f"No '{alarm_status}' action in the alert rule")
+                    continue
+                # Send HTTP request
+                notify_details = {
+                    "alarm_uuid": alert["uuid"],
+                    "status": alarm_status,
+                    "metric_name": alert["metric"],
+                    "start_date": alarm["startsAt"],
+                    "tags": alarm["labels"],
+                }
+                payload = {
+                    "schema_type": "notify_alarm",
+                    "schema_version": "1.1",
+                    "notify_details": notify_details,
+                }
+                headers = {"content-type": "application/json"}
+                for url in urls:
+                    logger.info(f"Sending HTTP POST to {url}...")
+                    try:
+                        resp = requests.post(
+                            url=url,
+                            data=json.dumps(payload),
+                            headers=headers,
+                            verify=False,
+                            timeout=15,
+                        )
+                        logger.info(f"Response {resp}")
+                    except ConnectionError:
+                        logger.info(f"Error connecting to url {url}")
+                    except RequestException as e:
+                        logger.info(
+                            f"RequestException while connecting to url {url}: {e}"
+                        )
+
+    main_task()
+
+
+dag = vdu_alarm()