Ensure smooth kubernetes version upgrades

cloud-gov / cg-agent-q

Issues and artifacts related to managed services for the cloud.gov platform.

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Ensure smooth kubernetes version upgrades #9

Closed jmcarp closed 7 years ago

jmcarp commented 8 years ago

Upgrading the kubernetes version should not disrupt service availability or result in lost data.

See http://kubernetes.io/docs/admin/cluster-management/#upgrading-clusters-on-other-platforms.

mogul commented 8 years ago

Possibly useful? https://www.infoq.com/news/2016/10/deis-helm-kubernetes

mogul commented 7 years ago

We should also look into self-driving k8s to figure out if the upstream is where the capability lies rather than anything particular to Tectonic.

mogul commented 7 years ago

@jmcarp will try rolling the k8s 1.5 update and see what breaks so we know what state we're in here.

jmcarp commented 7 years ago

Upgraded from 1.5.0 to 1.5.1 and verified that all pods came back without losing data. Of course, we're still going to have to read release notes before upgrades, but it looks like our upgrade process works as expected.