指定调度节点

I、Pod.spec.nodeName 将 Pod 直接调度到指定的 Node 节点上，会跳过 Scheduler 的调度策略，该匹配规则是强制匹配

apiVersion: extensions/v1beta1kind: Deploymentmetadata:  name: mywebspec:  replicas: 7  template:    metadata:      labels:        app: myweb    spec:      nodeName: k8s-node01      containers:      - name: myweb        image: wangyanglinux/myapp:v1        ports:        - containerPort: 80

II、Pod.spec.nodeSelector：通过 kubernetes 的 label-selector 机制选择节点，由调度器调度策略匹配 label，而后调度 Pod 到目标节点，该匹配规则属于强制约束

apiVersion: extensions/v1beta1kind: Deploymentmetadata:  name: mywebspec:  replicas: 2  template:    metadata:      labels:        app: myweb    spec:      nodeSelector:        type: backEndNode1      containers:      - name: myweb        image: harbor/tomcat:8.5-jre8        ports:        - containerPort: 80