Kubernetes-yaml-examples

Namespace

kind: Namespace
apiVersion: v1
metadata:
  name: test
  labels:
    name: test

Deployment

• https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#creating-a-deployment

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    app: nginx
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80

Secrets

• https://kubernetes.io/docs/tasks/configmap-secret/managing-secret-using-config-file/#create-the-config-file

echo -n 'secret value' | base64
echo $SECRET | base64 -d

• [[sealed-secrets]]

apiVersion: v1
kind: Secret
metadata:
  name: mysecret
type: Opaque
data:
  username: YWRtaW4=
  password: MWYyZDFlMmU2N2Rm

• Secrets from env files:
• kubectl create secret generic env --from-env-file=.env

envFrom:
- secretRef:
  name: env

Services

- ### Nodeport
	- ```yaml
	  apiVersion: v1
	  kind: Service
	  metadata:
	    name: my-service
	  spec:
	    type: NodePort
	    selector:
	      app.kubernetes.io/name: MyApp
	    ports:
	        # By default and for convenience, the `targetPort` is set to the same value as the `port` field.
	      - port: 80
	        targetPort: 80
	        # Optional field
	        # By default and for convenience, the Kubernetes control plane will allocate a port from a range (default: 30000-32767)
	        nodePort: 30007
	  ```

Ingress

• NFS Volumes

• There are two ways to handle NFS:

  • NFS Volume Documentation

  • NFS Subdir Provider

  • Example for NFS Volume:

    apiVersion: apps/v1
    kind: Deployment
    metadata:
    name: example-app
    labels:
    app: example-app
    spec:
    replicas: 1
    selector:
    matchLabels:
      app: example-app
    template:
    metadata:
      labels:
        app: example-app
    spec:
      containers:
      - name: example-app
        image: busybox:latest
        command: ["sleep", "3000"]
        volumeMounts:
        - mountPath: /persistent-volume
          name: nfs-volume
      volumes:
      - name: nfs-volume
        nfs:
          server: "server_ip"
          path: "/path/to/directory"