Files
homelab/k8s/infrastructure/longhorn/longhorn-taint-toleration.yaml
T
Story Crater Bot e2fcfe1fa8 feat(storage): enable Longhorn on all 3 control-plane nodes for true HA
Changes:
- k8s/infrastructure/longhorn/longhorn-taint-toleration.yaml: new Setting
  to tolerate node-role.kubernetes.io/control-plane:NoSchedule taint,
  allowing Longhorn DaemonSet to run on cp-2/cp-3 (not just cp-1)
- k8s/infrastructure/longhorn/longhorn-nodes.yaml: explicit Node CRDs for
  talos-cp-2 and talos-cp-3 (auto-discovery doesn't work when nodes have
  taints; these define /var/lib/longhorn as the storage path)
- k8s/infrastructure/longhorn/longhorn-wffc-storageclass.yaml: bump
  numberOfReplicas from 1→3 (true HA: each volume gets 3 copies across
  3 nodes; if one node fails, 2 others still have the data)
- k8s/infrastructure/longhorn/kustomization.yaml: add new resources

Root cause: Longhorn was only running on talos-cp-1 (.213) because cp-2/cp-3
have the control-plane taint and Longhorn DaemonSet had no matching toleration.
Every workload with a PVC was forced to schedule on cp-1 (via nodeSelector or
implicit co-location with the storage), defeating the entire purpose of a 3-node
HA cluster.

With this fix:
- Longhorn manager runs on all 3 nodes
- Storage is replicated 3x (erasure-coded across nodes)
- Pods can schedule on any node without PVC attachment failures
- True HA: lose 1 node, cluster still serves all volumes
2026-08-18 15:08:03 -07:00

10 lines
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YAML

# Longhorn taint-toleration setting - allows Longhorn to run on all control-plane nodes.
# Without this, Longhorn DaemonSet only runs on nodes without the control-plane taint,
# which in a 3-CP cluster with dedicated cp-2/cp-3 means only cp-1 gets storage.
apiVersion: longhorn.io/v1beta2
kind: Setting
metadata:
name: taint-toleration
namespace: longhorn-system
value: "node-role.kubernetes.io/control-plane:NoSchedule"