elkhand opened a new pull request, #23406:
URL: https://github.com/apache/flink/pull/23406

   [FLINK-32884](https://issues.apache.org/jira/browse/FLINK-32884) PyFlink 
remote execution should support URLs with paths and https scheme
   
   ## What is the purpose of the change
   
   Currently, the `SUBMIT_ARGS=remote -m http://<hostname>:<port>` format. For 
local execution it works fine `SUBMIT_ARGS=remote -m http://localhost:8081/`, 
but it does not support the placement of the JobManager behind a proxy or using 
an Ingress for routing to a specific Flink cluster based on the URL path. In 
the current scenario, it expects JobManager to access PyFlink jobs at 
`http://<hostname>:<port>/v1/jobs` endpoint. Mapping to a non-root location, 
`https://<hostname>:<port>/flink-clusters/namespace/flink_job_deployment/v1/jobs`
 is not supported.
   
   This will use changes from 
[FLINK-32885](https://issues.apache.org/jira/browse/FLINK-32885)(https://issues.apache.org/jira/browse/FLINK-32885)
   
   Since RestClusterClient talks to the JobManager via its REST endpoint, the 
right format for `SUBMIT_ARGS` is a URL with a path (also support for https 
scheme).
   
   
   ## Brief change log
   
   - Added 2 new options into RestOptions: RestOptions.PATH and 
RestOptions.PROTOCOL
   - Added `https` schema support and jobManagerUrl with path support to 
RestClusterClient
   - Added customHttpHeaders support to RestClusterClient (for example setting 
auth token from env variable)
   - Updated `NetUtils.validateHostPortString()` to handle both `http` and 
`https` schema for hostPort
   
   
   ## Verifying this change
   
   This change added tests and can be verified as follows:
   - Extended 
flink-clients/src/test/java/org/apache/flink/client/cli/DefaultCLITest.java to 
cover `http` and `https` schemes
   - Added unit test 
flink-core/src/test/java/org/apache/flink/util/NetUtilsTest.java to check 
`https` scheme and URL with path
   - Extended test 
flink-clients/src/test/java/org/apache/flink/client/program/rest/RestClusterClientTest.java
 to validate customHttpHeaders and jobmanagerUrl with path and `https` scheme
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): no
     - The public API, i.e., is any changed class annotated with 
`@Public(Evolving)`: no
     - The serializers: no
     - The runtime per-record code paths (performance sensitive): no
     - Anything that affects deployment or recovery: JobManager (and its 
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
     - The S3 file system connector: no
   
   ## Documentation
   
     - Does this pull request introduce a new feature? no
     - If yes, how is the feature documented? not applicable
   


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