k8s-pod选择node节点

1. node节点label管理

1.1 给节点加label

• 语法：
  # kubectl label node Node_Name Key=Value
• 示例

# kubectl label node gpu3 gpu-use=true

1.2 查看label

• 语法
  Kubectl get node gpu3 --show-labels
  

1.3 修改label

• 语法
  kubectl label node Node_Name Key=Value –overwrite

说明：添加label命令加上 --overwrite参数

• 示例

 kubectl label node gpu3 gpu-use=true --overwrite

1.4 删除lable

• 语法
  kubectl label node Node_Name Key-

说明：删除一个key，只需把key的后边加一个减号即可

• 示例

# kubectl label node gpu3 gpu_use-

2 pod选择node节点

说明：pod根据node的label选择节点

apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  name: nvidia-device-plugin-daemonset
  namespace: kube-system
spec:
  template:
    metadata:
      annotations:
        scheduler.alpha.kubernetes.io/critical-pod: ""
      labels:
        name: nvidia-device-plugin-ds
    spec:
      tolerations:
      - key: CriticalAddonsOnly
        operator: Exists
     #添加如下两行
      nodeSelector:
        gpu-use: "true"
      containers:
      - image: nvidia/k8s-device-plugin:1.11
        name: nvidia-device-plugin-ctr
        securityContext:
          capabilities:
            drop: ["ALL"]
        volumeMounts:
          - name: device-plugin
            mountPath: /var/lib/kubelet/device-plugins
      volumes:
        - name: device-plugin
          hostPath:
            path: /var/lib/kubelet/device-plugins

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