You are viewing documentation for Cozystack v1, which is currently in beta. For the latest stable version, see the v0 documentation.

Kube scheduler configuration

Kube scheduler configuration

Label nodes

kubectl label node <nodename> topology.kubernetes.io/zone=A

Create global app topology spread constraints

apiVersion: v1
kind: ConfigMap
metadata:
  name: cozystack-scheduling
  namespace: cozy-system
data:
  globalAppTopologySpreadConstraints: |
    topologySpreadConstraints:
    - maxSkew: 1
      topologyKey: topology.kubernetes.io/zone
      whenUnsatisfiable: DoNotSchedule

Configure PodTopologySpread

See: https://kubernetes.io/docs/concepts/scheduling-eviction/topology-spread-constraints/#cluster-level-default-constraints

For Talm installation: Add to templates/_helpers.tpl.

cluster:
...
  scheduler:
    config:
      apiVersion: kubescheduler.config.k8s.io/v1beta3
      kind: KubeSchedulerConfiguration
      profiles:
        - schedulerName: default-scheduler
          pluginConfig:
            - name: PodTopologySpread
              args:
                defaultConstraints:
                  - maxSkew: 1
                    topologyKey: topology.kubernetes.io/zone
                    whenUnsatisfiable: ScheduleAnyway
                defaultingType: List

Apply changes:

talm template -f nodes/node1.yaml -I
talm apply -f nodes/node1.yaml
Last modified 2026-02-12: fix: redirect old unversioned docs URLs to v0 (7be15dd)