Add service healthchecks

[mgruner]

No description provided.

[mgruner]

@derpixler @fliebe92 what do you think about this? Since @derpixler already added a health check for the railsserver, I think adding more for the base services makes sense. Now all defined depends_on can work on service_healthy instead of service_started.

[Copilot]

Pull request overview

This PR adds container healthchecks for core dependencies (Memcached, PostgreSQL, Redis) and updates depends_on to wait for those services to become healthy before starting Zammad services.

Changes:

• Switch depends_on entries for Zammad services from simple startup ordering to condition: service_healthy.
• Add healthchecks for zammad-memcached, zammad-postgresql, and zammad-redis.
• Simplify the zammad-railsserver healthcheck definition formatting.

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[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated no new comments.

[fliebe92]

Looks good to me and - for sure - a step into the right direction! Thanks for addressing the point CoPilot mentioned.

[mgruner]

Would you like to approve, @fliebe92?

[mgruner]

PostgreSQL start_period: 30s zu knapp (docker-compose.yml:179)

• Bei erster Initialisierung (Datenbank-Anlage) braucht Postgres oft >30s. Mit 5 Retries à 10s = ~80s Gesamtzeit. Kann bei langsamen Disks knapp werden.

@derpixler good point. I increased it to 60 seconds. For initializing an empty DB this sounds reasonable to me.

[fliebe92]

-z sounds good for the nc command.

[mgruner]

Can you have a look again, guys? I noticed more things, maybe for the future:

• zammad-init only depends on postgresql. This looks wrong at first sight, but there might be reasons for this - we need to clarify this before changing (not in this MR).
• There is no health check for ES and no dependency as well. Might also be historically works as designed (to run without ES). Maybe something for later.

[fliebe92]

Looks good to me, thanks for the changes 💪🏻