Thanks Houston, that answers my question perfectly.
Joel Bernstein http://joelsolr.blogspot.com/ On Fri, Jul 9, 2021 at 12:02 PM Houston Putman <houstonput...@gmail.com> wrote: > Unfortunately the podDisruptionBudget isn't so useful for Solr > applications. > > If we are merely talking about doing restarts of the Pod Spec (which could > include the OS that the Solr image uses), then the > updateStrategy takes care of that very well. If you are talking about doing > upgrades of the Kubernetes Nodes, then the updateStrategy > doesn't come into play at all. > > The issue with PodDisruptionBudget is that it treats all pods the same. > This works well for Zookeeper, where each pod does > contain the same data. For Solr however, we can have 12 Solr nodes, 3 > shards split across 4 nodes each. We might then want to > include a podDisruptionBudget of 3, so that we only take down one node of > each shard-group. However Kubernetes doesn't know what > our shard-groups are, so it could take down node(s) that contain 3 pods of > the same shard-group, completely ignoring the point of our > podDisruptionBudget. > > We could manually create shard-groups by using multiple statefulSets, at > which point you can use a separate podDisruptionBudget for each. > And this is probably a future option that the operator will enable, but > hasn't been planned for yet. > > In the meantime, you are able to create PodDisruptionBudget resources in > conjunction with your SolrCloud object. This is no different > in the end to what the Zookeeper Operator does, you just have to manage it > yourself. > > - Houston > > On Fri, Jul 9, 2021 at 11:52 AM Joel Bernstein <joels...@gmail.com> wrote: > > > WIth the Solr operator I see there is an updateStrategy for the managed > > Solr upgrades. But I don't see anything mentioned about pod disruption > > budgets. I saw that a Zookeeper pod disruption budget is installed with > the > > Zookeeper that deploys with the Solr operator but I didn't see one for > > Solr. > > > > Does the updateStrategy take the place of the pod disruption budgets or > do > > we need to specify one for the lower level (OS etc...) pod updates? > > > > > > Joel Bernstein > > http://joelsolr.blogspot.com/ > > >
