Deployment

Upgrade

• rolling upgrade

• Deployment

  • Replica Set

Definition

apiVersion: apps/v1
kind: Deployment
metadata:
  name: app-deployment
  labels:
      app: app
      type: front-end
spec:
  template:
    metadata:
      name: app-pod
      type: front-end
    spec:
      containers:
      - name: nginx-container
        image: nginx
  replicas: 3
  selector:
    matchLabels:
      type: front-end

• Create: kubectl create -f deployment.yaml
• Get all: kubectl get all
  • or:
    • Get Deployments: kubectl get deployments
    • Get Replicaset: kubectl get replicaset
    • Get Pods: kubectl get pods

Others

• --dry-run: tell you whether the resource can be created and if your command is right instead of creating the resource.
• -o <option>:
  • -o yaml: This will output the resource definition in YAML format on the screen.
  • -o json: This will output the resource definition in json format on the screen.
  • -o name: Print only the resource name and nothing else.
  • -o wide: Output in the plain-text format with any additional information.