k8s pod的nodeName指定

1. nodeName指定

nodeName：指定节点名称，用于将Pod调度到指定的Node上，不经过调度器

apiVersion: v1
kind: Pod
metadata:
  name: pod-example
  labels:
    app: nginx
spec:
  nodeName: k8s-node2     # 直接分配
  containers:
  - name: nginx
    image: nginx:1.15

2. 案例

• 编写nodeName直接指定分配

  [root@k8s-master pod]# vim kubelet_pod.yaml 
  [root@k8s-master pod]# cat kubelet_pod.yaml 
  apiVersion: apps/v1
  kind: Deployment
  metadata:
    labels:
      app: web
    name: web
  spec:
    replicas: 1
    selector:
      matchLabels:
        app: web
    strategy: {}
    template:
      metadata:
        labels:
          app: web
      spec:
        nodeName: k8s-node01
        containers:
        - image: nginx
          name: nginx
  

• 启动服务

  [root@k8s-master pod]# kubectl apply -f kubelet_pod.yaml 
  deployment.apps/web created
  

• 验证是否在node01

  [root@k8s-master pod]# kubectl get pods -o wide
  NAME                   READY   STATUS    RESTARTS   AGE    IP              NODE         NOMINATED NODE   READINESS GATES
  web-768c9b7466-s7whv   1/1     Running   0          116s   10.244.85.213   k8s-node01   <none>           <none>