Longhorn: Change number of replicas for a volume

[KuroObi]

Is it possible to change the number of replicas for a longhorn volume after it was created and already used?

[yasker]

We don't support change the replica number at the moment. It can be added if necessary. What's your use case?

[KuroObi]

In our development stacks we only use a replica factor of 1, but if we were to transfer it to production we would need the redundancy.

[yasker]

I see. Just to be clear, we don't recommend to use replica number of 1. You won't have any redundancy in this case.

Yeah, we can look into adding this feature in the future releases.

[courcelm]

I'm looking to deploy Elasticsearch with Longhorn. Since Elasticsearch replicates its data to the cluster nodes I think it would be useful to be able to set replica number to 1.

[yasker]

@courcelm Currently Longhorn does allow to set the replica number to 1. But for now, you cannot change it after the volume was created.

[courcelm]

How can it be done before creating it?

[yasker]

You can set it in the storage class. https://github.com/rancher/longhorn/blob/master/examples/storageclass.yaml

[yasker]

Filed #299 . Close this one.