[jira] [Created] (FLINK-24212) kerberos krb5.conf file is mounted as empty directory for customer file name

["LiuZeshan (Jira)" <ji...@apache.org>]

LiuZeshan created FLINK-24212:
---------------------------------

             Summary: kerberos krb5.conf file is mounted as empty directory for customer file name
                 Key: FLINK-24212
                 URL: https://issues.apache.org/jira/browse/FLINK-24212
             Project: Flink
          Issue Type: Bug
          Components: Deployment / Kubernetes
    Affects Versions: 1.13.2, 1.13.1, 1.12.1
            Reporter: LiuZeshan
             Fix For: 1.14.1
         Attachments: mykrb5conf.yaml

From [FLINK-18971]，we can mount kerberos krb5 conf file to pod with path /etc/krb5.conf，however if the krb5 conf file is not named krb5.conf (e.g named mykrb5.conf)，the mount path /etc/krb5.conf in pod will be an empty directory, not the file the we expected.

 
{code:java}
root@mykrb5-conf-test-6dd5c76f87-vfwh5:/# ls /etc/krb5.conf/ -la
total 8
drwxrwxrwx 2 root root 4096 Sep  8 10:42 .
drwxr-xr-x 1 root root 4096 Sep  8 10:42 ..{code}
 

 

The reason is that, the code  in [KerberosMountDecrator#decroateFlinkPod|https://github.com/apache/flink/blob/7e91e82fca999ddefa7ebdf198b8cfd3b6998b8b/flink-kubernetes/src/main/java/org/apache/flink/kubernetes/kubeclient/decorators/KerberosMountDecorator.java#L110], we create the deployment like this:

 
{code:java}
        volumeMounts:
        - mountPath: /etc/krb5.conf
          name: my-krb5conf-volume
          subPath: krb5.conf    
...
      volumes:
      - configMap:
          defaultMode: 420
          items:
          - key: mykrb5.conf
            path: mykrb5.conf
          name: my-krb5conf
        name: my-krb5conf-volume
{code}
path: mykrb5.conf should be set to const value "krb5.conf", not the file name that user provide.

 

we can use the yaml description file attachment to reproduce the problem.  [^mykrb5conf.yaml]

 

 



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