If internal links are not specified, the external one should be used for CHE_API, CHE_KEYCLOAK_AUTH__SERVER__URL, CHE_WORKSPACE_PLUGIN__REGISTRY__URL, CHE_WORKSPACE_DEVFILE__REGISTRY__URL

[ibuziuk]

Is your enhancement related to a problem? Please describe.

The issue is related to #18552 (Che API is not reachable from Che Theia)

The solution was to explicitly refer to external links from internal vars e.g.

• https://github.com/eclipse/che/pull/18574/files
• https://github.com/redhat-developer/rh-che/pull/2027/files

This looks like an overkill and if internal links / vars are not specified che server should simply fall back on external ones

TODO:

• operator must not set internal links if they are externals by fact.
• update helmcharts correspondingly
• adopt che-server correspondingly
• adopt che-theia (if internal is empty then external must be used)

Describe the solution you'd like

if internal links / vars are not specified che server should simply fall back on external ones
There should be no need to explicitly specify internal links

Describe alternatives you've considered

N/A

Additional context

Related to #18552