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 ...