[GitHub] [pulsar] addisonj opened a new pull request #5398: [functions] Distribute the CA for KubernetesSecretsTokenAuthProvider

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addisonj opened a new pull request #5398: [functions] Distribute the CA for KubernetesSecretsTokenAuthProvider
URL: https://github.com/apache/pulsar/pull/5398
 
 
   ### Motivation
   
   Currently, if a user has TLS enabled and is using a custom CA that isn't
   baked into the image, when the functions worker starts, it won't have
   the CA in order to validate the cert presented by the broker.
   
   
   ### Modifications
   
   This adds support to have  the `KubernetesSecretsTokenAuthProvider`
   also distribute the CA via the same kubernetes secret used for the
   token.
   
   ### Verifying this change
   
   - [x ] Make sure that the change passes the CI checks.
   
   This change added tests and can be verified as follows:
   - Added tests to ensure that the code paths work with and without a CA
   - Added tests to ensure that the filename returned is as expected
   
   ### Does this pull request potentially affect one of the following parts:
   
   *If `yes` was chosen, please highlight the changes*
   
     - Dependencies (does it add or upgrade a dependency): no
     - The public API: no
     - The schema: no
     - The default values of configurations: no
     - The wire protocol: no
     - The rest endpoints: no
     - The admin cli options: no
     - Anything that affects deployment: no
   
   ### Documentation
   
     - Does this pull request introduce a new feature? yes
     - If yes, how is the feature documented? not documented, but the KubernetesSecretsTokenAuthProvider is missing docs complete
     - If a feature is not applicable for documentation, explain why? It does need docs, but the functionality as a whole is missing docs
     - If a feature is not documented yet in this PR, please create a followup issue for adding the documentation
   

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