Jellyfin runs 2 replicas that coordinate distributed transcoding through the operator-managed `jellyfin-valkey` ValkeyCluster, but it was single-instance (shards:1, replicas:0) with no failover, so a node/pod loss would drop the shared transcode-lease state. This promotes that store to an HA topology.
Changes:
- Set replicas:2 (shards:1 unchanged) so the shard group is one primary + two replicas; losing the primary triggers an automatic in-cluster failover to a replica.
- Add scheduling.node.spread.shard.mode:Required so the three ValkeyNodes land on distinct hosts (kubernetes.io/hostname anti-affinity) and one host loss removes at most one node.
- Set podDisruptionBudget.mode:Cluster so the operator manages a quorum-aware PDB.
- Keep persistence omitted (emptyDir): lease state is ephemeral (30s TTLs), replication+failover already provide redundancy and a replaced node re-syncs from the primary, and an operator-managed PVC cannot carry the k8up.io/backup:"false" annotation the namespace k8up Schedule needs to skip in-use RWO volumes.
- Bump per-node memory limit to 512Mi (unchanged) / requests unchanged; resources are per ValkeyNode.
Connection string is unchanged: still cluster-mode via the single headless service `valkey-jellyfin-valkey:6379`; StackExchange.Redis seeds off it and auto-discovers topology and failovers.
kustomize build --enable-helm apps/overlays/au-syd1/jellyfin renders cleanly; pre-commit passes.
Reviewed-on: #375
Co-authored-by: unkin-agent <unkin-agent@unkin.net>
Co-committed-by: unkin-agent <unkin-agent@unkin.net>
unkin-agent
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