feature: wait for APIExport to become available

[gman0]

Feature Description

If the syncing APIExport is not available in the source cluster, api-syncagent exits immediately. This behavior breaks workflows where the user wants to start up pods / bins before creating APIExports.

Proposed Solution

Instead, the agent could wait indefinitely until the resource becomes available (maybe with a separate --wait-for-apiexport-exists flag).

Alternative Solutions

No response

Want to contribute?

• I would like to work on this issue.

Additional Context

No response

[gman0]

I can work on this sometime during the week if maintainers agree this makes sense.

[xrstf]

I am not sure it's worth or wise to complicate the code with a wait loop. The agent is configured to sync a given APIExport, and this export doesn't exist. That is an (human) error and instead of hiding that in a silent forever-running wait loop, I much rather prefer the Pod to go into a CrashLoop, something that is detectable with monitoring tools like Prometheus.