K8s tips - scheduling pods with taints and tolerations

• Taints and Tolerations

kubectl taint node ip-10-0-1-102 node-type=prod:NoSchedule

cat <<EOF | kubectl apply -f -
apiVersion: v1
kind: Pod
metadata:
  name: dev-pod
  labels:
    app: busybox
spec:
  containers:
  - name: dev
    image: busybox
    command: ['sh', '-c', 'echo Hello Kubernetes! && sleep 3600']
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: prod
spec:
  replicas: 1
  selector:
    matchLabels:
      app: prod
  template:
    metadata:
      labels:
        app: prod
    spec:
      containers:
      - args:
        - sleep
        - "3600"
        image: busybox
        name: main
      tolerations:
      - key: node-type
        operator: Equal
        value: prod
        effect: NoSchedule
EOF

kubectl get pods -o wide
kubectl scale deployment/prod --replicas=3

kubectl get pods <pod_name> -o yaml