DaemonSets and Jobs

DaemonSets and Jobs

# DaemonSet — one pod per node (logging, monitoring)
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: fluentd
spec:
  selector:
    matchLabels:
      app: fluentd
  template:
    metadata:
      labels:
        app: fluentd
    spec:
      containers:
        - name: fluentd
          image: fluentd:latest

# Job — run to completion
apiVersion: batch/v1
kind: Job
metadata:
  name: db-migrate
spec:
  template:
    spec:
      containers:
        - name: migrate
          image: myapp:latest
          command: ["python", "manage.py", "migrate"]
      restartPolicy: OnFailure

# CronJob — scheduled job
spec:
  schedule: "0 2 * * *"   # 2am daily
  jobTemplate: ...