Mongodb pod fails to use existing PVC during an upgrade about helm-charts HOT 5 CLOSED

Hi @windowsrefund!
Apologies for the delay.

The error is caused by ReadWriteOnce access mode of a Mongo volume. It means that the volume can be mounted as read-write by a single node. It can still allow multiple pods to access the volume but they need to reside on the same node. More about access modes: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#access-modes

There were no changes from our side to Mongo values so the pod was recreated for a different reason (perhaps it needed to be moved to another node as the current one was lacking resources or sth ) and while the volume was still used by a previous pod a new one could not attach to it.

To avoid such issues in future you may consider using Recreate strategy for Deployments: https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#recreate-deployment
It will guarantee termination of an older pod before a new one is launched.

from helm-charts.

@ypoplavs please check

from helm-charts.

bumping this

from helm-charts.

Thanks for this. I was able to upgrade as expected after adding the following into my values.yaml

mongodb:
  updateStrategy:
    type: Recreate

However, now I appear to have hit another issue. A test suite which ran fine on the previous deployment is now failing despite the fact I haven't changed anything related to minio. Here's the appropriate key of the corresponding tse

executionresult:
        status: failed
        output: ""
        outputtype: ""
        errormessage: 'can''t create new test execution, can''t insert into storage:
          could not create bucket: bucket "testkube-logs" already exists'
        steps: []
        reports: null

I'll post an update should I find the root cause

from helm-charts.

OK so interestingly enough, the failure occurs only once post upgrade and subsequent runs pass. I'll probably close this out soon (unless my experience changes) as the primary issue has been resolved. That said, feel free to ping me if I can provide any info that may be helpful.

from helm-charts.