[Jenkins-infra] Procedure for upgrading our Kubernetes cluster (Azure Container Service)

[R. Tyler Croy]

(replies inline)

On Thu, 15 Jun 2017, Olblak wrote:

> My point here is that we are running one version behind what ACS deploy
> now.
> -> https://github.com/Azure/ACS/blob/master/kubernetes-status.md
> 
> It's not yet urgent but we have to think about "how to upgrade the
> cluster".
> And meanwhile, we all know what happen when we delay to many upgrades.
> 
> Apparently upgrades are not yet supported by Azure which means that we
> gonna have to do it manually and by 'ourself'.
> 
> So Right now we have two possibilities:
>   - We upgrade the cluster 'now'
>   - We delay a little bit and we hope that the procedure will be
>   simplified by Azure


Regardless of the timing, we still *must* upgrade the Kubernetes cluster at
some point. My goal for this thread was more to discuss *how* we would perform
the upgrade, and the impact it would have.

The way I see it, there are two paths we can follow, please correct me if there
are more:

1. Deploy a new cluster, migrate all existing workloads over
2. Manually upgrade the existing cluster


The details of the upgrade path is really what I would like us to discuss here.

- R. Tyler Croy

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