Deploy application in Kubernetes

1. set alias in powershell
   set-alias -name k -value kubectl
2. Create pod manifest template
   k run tellhost --image=toka9988/tellhost --dry-run=client -o yaml >mypod.yaml
3. Apply pod manifest file to create a pop
   k apply -f mypod.yaml
4. Set up port-forward
   k port-forward tellhost 8080 tellhost is the pod name, the porxy will wait connect. Use another powershell terminal to test.
5. show pod log
   k logs tellhost
   stream the application log in real-time to see each request as it comes in
   k logs tellhost -f --follow
   k logs tellhost --timestamps=true show log time of each line
6. copy file between local PC and pods
   k cp tellhost:\etc\hosts hosts.txt
7. Run command in Pod
   k exec tellhost -- ps aux
k exec tellhost -it -- bash
8. delete pod by name
   k delete pod tellhost3
k delete pod tellhost2 --wait=false
9. Creating an HTTP GET liveness probe

apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: null
  labels:
    run: tellhost
  name: tellhost
spec:
  containers:
  - image: toka9988/tellhost
    name: tellhost
    ports:
    - containerPort: 8080
    livenessProbe:
      httpGet:
        path: /
        port: 8080
      initialDelaySeconds: 10
      periodSeconds: 5
      timeoutSeconds: 2
      failureThreshold: 3
    resources: {}
  dnsPolicy: ClusterFirst
  restartPolicy: Always
status: {}

1. Using a startup probe

apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: null
  labels:
    run: tellhost
  name: tellhost
spec:
  containers:
  - image: toka9988/tellhost
    name: tellhost
    ports:
    - containerPort: 8080
    startupProbe:
      httpGet:
        path: /
        port: http
      periodSeconds: 10
      failureThreshold: 12
    livenessProbe:
      httpGet:
        path: /
        port: 8080
      periodSeconds: 5
      timeoutSeconds: 2
      failureThreshold: 3
    resources: {}
  dnsPolicy: ClusterFirst
  restartPolicy: Always
status: {}