K8s cheat sheet

k8s.yaml

###
# Statefulset
###
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: [STATEFULSET_NAME]
spec:
  serviceName: [SERVICE_NAME]
  replicas: 3
  updateStrategy:
    type: RollingUpdate
  template:
    metadata:
      labels:
        app=[APP_NAME]
    spec:
      containers:
      - name: [CONTAINER_NAME]
        image: ...
        ports:
        - containerPort: 80
          name: [PORT_NAME]
        volumeMounts:
        - name: [PVC_NAME]
          mountPath: ...
  volumeClaimTemplates:
  - metadata:
      name: [PVC_NAME]
      annotations:
        ...
    spec:
      accessModes: [ "ReadWriteOnce" ]
      resources:
        requests:
          storage: 1Gi
---
###
# Storageclass (Cloud dependent)
###
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: ssd-storage
provisioner: kubernetes.io/gce-pd
parameters:
  type: pd-ssd
  
---
###
# Deployment (just a pod with no service)
###

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  annotations:
    deployment.kubernetes.io/revision: "3"
  generation: 1
  labels:
    app: [name]
  name: [name]
spec:
  replicas: 1
  selector:
    matchLabels:
      app: [name]
  strategy:
    rollingUpdate:
      maxSurge: 25%
      maxUnavailable: 25%
    type: RollingUpdate
  template:
    metadata:
      labels:
        app: [name]
    spec:
      containers:
      - image: [image location:version]
        imagePullPolicy: Always
        name: [Name]
        env:
          - name: [Name of evn variable]
            valueFrom:
              secretKeyRef:
                name: [Secret groupd name]
                key:  [secret name]
      restartPolicy: Always
      terminationGracePeriodSeconds: 30