Lifecycle of k8s pod

pod-lifecycle.yml

kind: Deployment
apiVersion: apps/v1beta1
metadata:
  name: lifecycle
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: lifecycle
    spec:
      volumes:
      - name: shared-log-record
        hostPath:
          path: /tmp/logs
          type: Directory
      initContainers:
      - name:           init-container
        image:          busybox
        command:       ['sh', '-c', 'echo $(date): Init Container >> /logs/record && sleep 5']
        volumeMounts:
        - name: shared-log-record
          mountPath: /logs
      containers:
      - name: main-container
        image: busybox
        volumeMounts:
        - name: shared-log-record
          mountPath: /logs
        command: ['sh', '-c', 'echo $(date): Running main container >> /logs/record && echo "The app is started" && /bin/sleep 30']
        readinessProbe:
          exec:
            command: ['sh', '-c', 'echo $(date): Invoking Readiness Probe >> /logs/record']
          initialDelaySeconds: 5 
        livenessProbe:
          exec:
            command: ['sh', '-c', 'echo $(date): Invoking Liveliness Probe >> /logs/record']
          initialDelaySeconds: 5 
          timeoutSeconds: 30
        lifecycle:
          postStart:
            exec:
              command: ['sh', '-c', 'echo $(date): Invoking Post Start >> /logs/record']
          preStop:
            exec:
              command: ['sh', '-c', 'echo $(date): Invoking Pre Stop >> /logs/record']