• k8s
• StudyNotes
• DaemonSets

k8s/StudyNotes/ DaemonSets

• One copy of pod on all nodes in cluster.

• kubectl get daemonset <name>
  kubectl describe daemonset <name>

• DaemonSet definition file similar to ReplicaSet

  apiVersion: apps/v1
  kind: DaemonSet
  metadata:
    name: mon-daemonset
  spec:
    selector:
      matchLabels:
        ...
    templates:
      metadata:
        labels:
          ...
      spec:
        containers:
          ...

• Uses default scheduler and node affinity to place daemons on nodes.

• To create a new daemonset template from Deployment

  kubectl create deployment <name> --image=<image> --namespace=kube-system --dry-run=client -o yaml > ds.yaml
  # edit and change kind to DaemonSet, remove unused settings, eg. replicas , strategy ...