delay container startup or define container/service dependency

[Yong Zhang]

Hi, all

I have one pod with two containers e.g. A and B, 

A should start after B because it relies on service B.

I can't find any solution to make container A delay startup, is there any workaround or best practices on Kubernetes for this scenario?  Thanks.

[Matthias Rampke]

There's not really a way to express that dependency. You can make the second container wait in a wrapper script, or just let it crash and get restarted until it can successfully start.

/MR

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[David Oppenheimer]

https://kubernetes.io/docs/concepts/workloads/pods/init-containers/

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[Tim Hockin]

What happens if B crashes and restarts?  Or hiccups and just stops responding for a couple seconds? You have to handle that anyway, so ordering is irrelevant.

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