Updated 2022-05-19: We're making Redis in k8s our first option again for Sidekiq Zonal clusters. See rationale on https://gitlab.com/groups/gitlab-com/gl-infra/-/epics/423#note_952958265 Updated 2021-04-14: Not going to happen for the initial implementation of Sidekiq Zonal clusters. May happen in future, so I'm going to leave it open, unless we decide it's distracting and should be removed (along with its issues) Spin up a Redis in each Kubernetes and validate making it fully operational (steps 1 and 2 from the [original proposal issue](https://gitlab.com/gitlab-com/gl-infra/scalability/-/issues/867#note_510714121)) * Impact: Nothing direct, although it provide experience in doing so (our first persistent service) * If this hits insurmountable problems (either technical or expense/resource), we can fall back to running VMs in the relevant zone.