Kubernetes Taints and Tolerations example

1.Add taint label to node

kubectl taint nodes lp-knode-01 key=value:NoSchedule

kubectl taint nodes lp-knode-01 key=arm:NoSchedule

kubectl taint nodes lp-knode-01 node=arm64:NoSchedule

kubectl taint nodes lp-arm-{1,2,3,4}.home node=arm64:NoSchedule


kubectl get nodes -o json | jq '.items[].spec.taints'

2.Add toleration in deployment

apiVersion: apps/v1
kind: Deployment
metadata:
  name: sonarqube-deployment
  labels:
    app: sonarqube
    env: prod
spec:
  replicas: 1
  selector:
    matchLabels:
      app: sonarqube
      env: prod
  template:
    metadata:
      labels:
        app: sonarqube
        env: prod
    spec:
      nodeSelector:
        node: "lp-knode-01"
      containers:
      - name: sonarqube-container
        image: sonarqube
        imagePullPolicy: IfNotPresent
        resources:
          requests:
            memory: "1024Mi"
            cpu: "100m"
          limits:
            memory: "2048Mi"
            cpu: "2000m"
        volumeMounts:
          - name: sonarqube-data
            mountPath: /opt/sonarqube/data
        ports:
        - containerPort: 9000    
      tolerations:
      - key: "key"
        operator: "Equal"
        value: "arm"
        effect: "NoSchedule"
      volumes:
        - name: sonarqube-data
          nfs:
            server: 192.168.0.184
            path: "/opt/nfs1/sonarqube/data"
---
kind: Service
apiVersion: v1
metadata:
  name: sonarqube-service
  labels:
    app: sonarqube
    env: prod
spec:
  selector:
    app: sonarqube
    env: prod
  ports:
  - name: sonarqube
    protocol: TCP
    port: 9000
    targetPort: 9000
    nodePort: 30900
  type: NodePort

---

      tolerations:
      - key: "key"
        operator: "Exists"
        effect: "NoSchedule"