[jira] [Created] (FLINK-29145) docker-entrypoint.sh - Read-only file system

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

Arseniy Tashoyan created FLINK-29145:
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             Summary: docker-entrypoint.sh - Read-only file system
                 Key: FLINK-29145
                 URL: https://issues.apache.org/jira/browse/FLINK-29145
             Project: Flink
          Issue Type: Bug
          Components: Kubernetes Operator
    Affects Versions: 1.15.2, 1.16.0
            Reporter: Arseniy Tashoyan


When running a FlinkDeployment, we can see error messages:

{code:none}
sed: couldn't open temporary file /opt/flink/conf/sedHIUGh6: Read-only file system
sed: couldn't open temporary file /opt/flink/conf/sedNALzes: Read-only file system
/docker-entrypoint.sh: line 73: /opt/flink/conf/flink-conf.yaml: Read-only file system
/docker-entrypoint.sh: line 89: /opt/flink/conf/flink-conf.yaml.tmp: Read-only file system
{code}

The script _docker-entrypoint.sh_ tries to modify some settings in _flink-conf.yaml_, despite this file mounted read-only from a ConfigMap.

Such on-the-fly config modifications make no sense for deployments in Kubernetes. Instead we specify Flink settings via the _flinkConfiguration_ setting in the FlinkDeployment descriptor.

In addition, _docker-entrypoint.sh_ tries to modify a deprecated setting _query.server.port_:

{code:bash}
set_config_option query.server.port 6125
{code}

The setting query.server.port is deprecated in favor of _queryable-state.server.ports_:
https://nightlies.apache.org/flink/flink-docs-master/docs/dev/datastream/fault-tolerance/queryable_state/#state-server




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