由于无法访问kubernetes api服务器群集IP，大使Pod在kubernetes中失败-[Errno 113]主机无法访问'，）

时间：2019-03-07 08:11:19

标签： kubernetes 

Issue with Ambassador deployment starting in Kubernetes:
Kubernetes - v1.13
Ambassador - image: quay.io/datawire/ambassador:0.50.3
Container Runtime - Docker
Cluster networking done used Flannel

整个设置是在一台Windows 10计算机上的两个Oracle VM上完成的。     应用的网络是“仅主机”，主节点为192.168.99.110，节点为192.168.99.101。     我正在使用 kubectl apply -f https://getambassador.io/yaml/ambassador/ambassador-rbac.yaml 部署大使。 30秒后，当kubernetes容器启动Kube观看时，它将进入“ CrashLoopBackOff”状态。我检查了Pod的日志，并在下面说-在最后一句话中指出10.96.0.1（API服务器群集IP）无法访问：

   " []# kubectl logs ambassador-76f644ddfb-vnj4d
2019-03-06 17:12:13 kubewatch [23 TMainThread] 0.50.3 INFO: kubewatch starting: mode 'cluster-id' ambassador_config_dir '/no/such/path' envoy_config_file '/dev/null' debug 'False' delay '1.0' pid 'None'
2019-03-06 17:12:13 kubewatch [23 TMainThread] 0.50.3 INFO: namespace default, watching all namespaces
2019-03-06 17:12:14,131 WARNING Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f739506d748>: Failed to establish a new connection: [Errno 113] Host is unreachable',)': /api/v1/namespaces/default
2019-03-06 17:12:14 kubewatch [23 TMainThread] 0.50.3 WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f739506d748>: Failed to establish a new connection: [Errno 113] Host is unreachable',)': /api/v1/namespaces/default
2019-03-06 17:12:15,136 WARNING Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f739506d7f0>: Failed to establish a new connection: [Errno 113] Host is unreachable',)': /api/v1/namespaces/default
2019-03-06 17:12:15 kubewatch [23 TMainThread] 0.50.3 WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f739506d7f0>: Failed to establish a new connection: [Errno 113] Host is unreachable',)': /api/v1/namespaces/default
2019-03-06 17:12:16,140 WARNING Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f739506d898>: Failed to establish a new connection: [Errno 113] Host is unreachable',)': /api/v1/namespaces/default
2019-03-06 17:12:16 kubewatch [23 TMainThread] 0.50.3 WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f739506d898>: Failed to establish a new connection: [Errno 113] Host is unreachable',)': /api/v1/namespaces/default
2019-03-06 17:12:17 kubewatch [23 TMainThread] 0.50.3 WARNING: kubewatch failed!
Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/urllib3/connection.py", line 159, in _new_conn
    (self._dns_host, self.port), self.timeout, **extra_kw)
  File "/usr/lib/python3.6/site-packages/urllib3/util/connection.py", line 80, in create_connection
    raise err
  File "/usr/lib/python3.6/site-packages/urllib3/util/connection.py", line 70, in create_connection
    sock.connect(sa)
OSError: [Errno 113] Host is unreachable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/urllib3/connectionpool.py", line 600, in urlopen
    chunked=chunked)
  File "/usr/lib/python3.6/site-packages/urllib3/connectionpool.py", line 343, in _make_request
    self._validate_conn(conn)
  File "/usr/lib/python3.6/site-packages/urllib3/connectionpool.py", line 839, in _validate_conn
    conn.connect()
  File "/usr/lib/python3.6/site-packages/urllib3/connection.py", line 301, in connect
    conn = self._new_conn()
  File "/usr/lib/python3.6/site-packages/urllib3/connection.py", line 168, in _new_conn
    self, "Failed to establish a new connection: %s" % e)
urllib3.exceptions.NewConnectionError: <urllib3.connection.VerifiedHTTPSConnection object at 0x7f739506d9b0>: Failed to establish a new connection: [Errno 113] Host is unreachable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/ambassador/kubewatch.py", line 527, in <module>
    main()
  File "/usr/lib/python3.6/site-packages/click/core.py", line 764, in __call__
    return self.main(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/click/core.py", line 717, in main
    rv = self.invoke(ctx)
  File "/usr/lib/python3.6/site-packages/click/core.py", line 956, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/lib/python3.6/site-packages/click/core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "/ambassador/kubewatch.py", line 518, in main
    watcher.run(id_only=True)
  File "/ambassador/kubewatch.py", line 342, in run
    self.get_cluster_id(v1)
  File "/ambassador/kubewatch.py", line 407, in get_cluster_id
    ret = v1.read_namespace(wanted)
  File "/usr/lib/python3.6/site-packages/kubernetes/client/apis/core_v1_api.py", line 17572, in read_namespace
    (data) = self.read_namespace_with_http_info(name, **kwargs)
  File "/usr/lib/python3.6/site-packages/kubernetes/client/apis/core_v1_api.py", line 17657, in read_namespace_with_http_info
    collection_formats=collection_formats)
  File "/usr/lib/python3.6/site-packages/kubernetes/client/api_client.py", line 321, in call_api
    _return_http_data_only, collection_formats, _preload_content, _request_timeout)
  File "/usr/lib/python3.6/site-packages/kubernetes/client/api_client.py", line 155, in __call_api
    _request_timeout=_request_timeout)
  File "/usr/lib/python3.6/site-packages/kubernetes/client/api_client.py", line 342, in request
    headers=headers)
  File "/usr/lib/python3.6/site-packages/kubernetes/client/rest.py", line 231, in GET
    query_params=query_params)
  File "/usr/lib/python3.6/site-packages/kubernetes/client/rest.py", line 205, in request
    headers=headers)
  File "/usr/lib/python3.6/site-packages/urllib3/request.py", line 68, in request
    **urlopen_kw)
  File "/usr/lib/python3.6/site-packages/urllib3/request.py", line 89, in request_encode_url
    return self.urlopen(method, url, **extra_kw)
  File "/usr/lib/python3.6/site-packages/urllib3/poolmanager.py", line 323, in urlopen
    response = conn.urlopen(method, u.request_uri, **kw)
  File "/usr/lib/python3.6/site-packages/urllib3/connectionpool.py", line 667, in urlopen
    **response_kw)
  File "/usr/lib/python3.6/site-packages/urllib3/connectionpool.py", line 667, in urlopen
    **response_kw)
  File "/usr/lib/python3.6/site-packages/urllib3/connectionpool.py", line 667, in urlopen
    **response_kw)
  File "/usr/lib/python3.6/site-packages/urllib3/connectionpool.py", line 638, in urlopen
    _stacktrace=sys.exc_info()[2])
  File "/usr/lib/python3.6/site-packages/urllib3/util/retry.py", line 398, in increment
    raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='10.96.0.1', port=443): Max retries exceeded with url: /api/v1/namespaces/default (Caused by NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f739506d9b0>: Failed to establish a new connection: [Errno 113] Host is unreachable',))
AMBASSADOR: kubewatch cluster-id exited with status 1
AMBASSADOR: shutting down (1)"

1 个答案:

答案 0 :(得分：0)

更新。我在主服务器和节点中都禁用了防火墙服务，并且该问题现在已解决。我认为根本原因是由于防火墙限制，节点中的POD无法访问主节点上的kube-dn。

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