I think you want to submit a Flink python job to the existing session
cluster.
Please ensure the session cluster is created with proper service exposed
type[1].
* LoadBalancer for the cloud environment
* NodePort for self managed K8s cluster
* ClusterIP for the K8s internal submission, which means you should submit
the Flink application in the K8s cluster. This could be done by starting a
pod as the Flink client.

[1].
https://ci.apache.org/projects/flink/flink-docs-master/docs/deployment/resource-providers/native_kubernetes/#accessing-flinks-web-ui

Best,
Yang

Robert Cullen <cinquate...@gmail.com> 于2021年3月6日周六 上午12:43写道:

> Trying to spin up a Python Flink instance in my Kubernetes cluster with
> this configuration ...
>
> sudo ./bin/flink run \
> --target kubernetes-session \
> -Dkubernetes.cluster-id=flink-python \
> -Dkubernetes.namespace=cmdaa \
> -Dkubernetes.container.image=cmdaa/pyflink:0.0.1 \
> --pyModule word_count \
> --pyFiles /opt/flink-1.12.2/examples/python/table/batch/word_count.py
>
>  ... But getting this error:
>
> Traceback (most recent call last):
>   File "/Users/admin/.pyenv/versions/3.6.10/lib/python3.6/runpy.py", line 
> 193, in _run_module_as_main
>     "__main__", mod_spec)
>   File "/Users/admin/.pyenv/versions/3.6.10/lib/python3.6/runpy.py", line 85, 
> in _run_code
>     exec(code, run_globals)
>   File 
> "/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/pyflink/074c581c-5b39-4b07-ac84-55a86c46f9eb/affe3559-5364-43f1-93ef-b7f6cd9a2f77/word_count.py",
>  line 80, in <module>
>     word_count()
>   File 
> "/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/pyflink/074c581c-5b39-4b07-ac84-55a86c46f9eb/affe3559-5364-43f1-93ef-b7f6cd9a2f77/word_count.py",
>  line 74, in word_count
>     t_env.execute("word_count")
>   File 
> "/opt/flink-1.12.2/opt/python/pyflink.zip/pyflink/table/table_environment.py",
>  line 1276, in execute
>   File 
> "/opt/flink-1.12.2/opt/python/py4j-0.10.8.1-src.zip/py4j/java_gateway.py", 
> line 1286, in __call__
>   File "/opt/flink-1.12.2/opt/python/pyflink.zip/pyflink/util/exceptions.py", 
> line 147, in deco
>   File "/opt/flink-1.12.2/opt/python/py4j-0.10.8.1-src.zip/py4j/protocol.py", 
> line 328, in get_return_value
> py4j.protocol.Py4JJavaError: An error occurred while calling o2.execute.
> : java.lang.RuntimeException: 
> org.apache.flink.client.deployment.ClusterRetrieveException: Could not get 
> the rest endpoint of flink-python
>     at 
> org.apache.flink.kubernetes.KubernetesClusterDescriptor.lambda$createClusterClientProvider$0(KubernetesClusterDescriptor.java:102)
>     at 
> org.apache.flink.kubernetes.KubernetesClusterDescriptor.retrieve(KubernetesClusterDescriptor.java:145)
>     at 
> org.apache.flink.kubernetes.KubernetesClusterDescriptor.retrieve(KubernetesClusterDescriptor.java:66)
>     at 
> org.apache.flink.client.deployment.executors.AbstractSessionClusterExecutor.execute(AbstractSessionClusterExecutor.java:75)
>     at 
> org.apache.flink.table.api.internal.BatchTableEnvImpl.executePipeline(BatchTableEnvImpl.scala:347)
>     at 
> org.apache.flink.table.api.internal.BatchTableEnvImpl.execute(BatchTableEnvImpl.scala:317)
>     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>     at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>     at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>     at java.lang.reflect.Method.invoke(Method.java:498)
>     at 
> org.apache.flink.api.python.shaded.py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)
>     at 
> org.apache.flink.api.python.shaded.py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
>     at 
> org.apache.flink.api.python.shaded.py4j.Gateway.invoke(Gateway.java:282)
>     at 
> org.apache.flink.api.python.shaded.py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
>     at 
> org.apache.flink.api.python.shaded.py4j.commands.CallCommand.execute(CallCommand.java:79)
>     at 
> org.apache.flink.api.python.shaded.py4j.GatewayConnection.run(GatewayConnection.java:238)
>     at java.lang.Thread.run(Thread.java:748)
> Caused by: org.apache.flink.client.deployment.ClusterRetrieveException: Could 
> not get the rest endpoint of flink-python
>     ... 17 more
>
> org.apache.flink.client.program.ProgramAbortException
>     at org.apache.flink.client.python.PythonDriver.main(PythonDriver.java:124)
>     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>     at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>     at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>     at java.lang.reflect.Method.invoke(Method.java:498)
>     at 
> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:349)
>     at 
> org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:219)
>     at 
> org.apache.flink.client.ClientUtils.executeProgram(ClientUtils.java:114)
>     at 
> org.apache.flink.client.cli.CliFrontend.executeProgram(CliFrontend.java:812)
>     at org.apache.flink.client.cli.CliFrontend.run(CliFrontend.java:246)
>     at 
> org.apache.flink.client.cli.CliFrontend.parseAndRun(CliFrontend.java:1054)
>     at 
> org.apache.flink.client.cli.CliFrontend.lambda$main$10(CliFrontend.java:1132)
>     at 
> org.apache.flink.runtime.security.contexts.NoOpSecurityContext.runSecured(NoOpSecurityContext.java:28)
>     at org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:1132)
>
> --
> Robert Cullen
> 240-475-4490
>

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