tomcat-deployment.yaml

kind: Deployment
apiVersion: extensions/v1beta1
metadata:
  name: tomcat
spec:
  replicas: 1
  selector:
    matchLabels:
      app: tomcat
  template:
    metadata:
      labels:
        app: tomcat
    spec:
      hostname: tomcat
      dnsPolicy: ClusterFirst
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
            - matchExpressions:
              - key: kubernetes.io/hostname
                operator: In
                values:
                - node1.qyos.com
                - node7.qyos.com
#          preferredDuringSchedulingIgnoredDuringExecution:
#          - weight: 1               //取值范围1-100
#            preference:
#              matchExpressions:
#              - key: another-node-label-key
#                operator: In
#                values:
#                - another-node-label-value
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
          - labelSelector:
              matchExpressions:
              - key: app
                operator: In
                values:
                - tomcat
            topologyKey: kubernetes.io/hostname
      containers:
      - name: tomcat
        image: docker-registry.default.svc:5000/openshift/tomcat:latest
        imagePullPolicy: IfNotPresent
        ports:
        - containerPort: 8080