When I run a docker image using KubernetesPodOperator in Airflow version 1.10
Once the pod finishes the task successfullly, airflow tries to get the xcom value by making a connection to the pod via k8s stream client.
Following is the error which I encountered:
[2018-12-18 05:29:02,209] {{models.py:1760}} ERROR - (0)
Reason: Handshake status 403 Forbidden
Traceback (most recent call last):
File "/usr/local/lib/python3.6/site-packages/kubernetes/stream/ws_client.py", line 249, in websocket_call
client = WSClient(configuration, get_websocket_url(url), headers)
File "/usr/local/lib/python3.6/site-packages/kubernetes/stream/ws_client.py", line 72, in __init__
self.sock.connect(url, header=header)
File "/usr/local/lib/python3.6/site-packages/websocket/_core.py", line 223, in connect
self.handshake_response = handshake(self.sock, *addrs, **options)
File "/usr/local/lib/python3.6/site-packages/websocket/_handshake.py", line 79, in handshake
status, resp = _get_resp_headers(sock)
File "/usr/local/lib/python3.6/site-packages/websocket/_handshake.py", line 152, in _get_resp_headers
raise WebSocketBadStatusException("Handshake status %d %s", status, status_message)
websocket._exceptions.WebSocketBadStatusException: Handshake status 403 ForbiddenI'm using K8s service account for this
DAG configs
xcom=true,
get_logs=True,
in_cluster=true
So we also hit this problem, we had to modify our rbac rules, in particular we had to add the resource "pods/exec" with the verbs "create" and "get"
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: airflow-runner
rules:
- apiGroups: [""]
resources: ["deployments", "pods", "pods/log", "pods/exec", "persistentvolumeclaims"]
verbs: ["*"]
- apiGroups: [""]
resources: ["secrets"]
resourceNames: ["singleuser-image-credentials"]
verbs: ["read","list","watch","create","get"]