气流 k8s 运营商 xcom - 握手状态 403 禁止

Question

当我在 Airflow 1.10 版中使用KubernetesPodOperator运行docker 镜像时

一旦 pod 成功完成任务，airflow 会尝试通过 k8s 流客户端连接到 pod 来获取 xcom 值。

以下是我遇到的错误：

[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 Forbidden

我为此使用 K8s 服务帐户

DAG 配置

xcom=真，

get_logs=真，

in_cluster=true

Answer 1

所以我们也遇到了这个问题，我们不得不修改我们的 rbac 规则，特别是我们必须添加带有动词“create”和“get”的资源“pods/exec”

---
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"]