Kubernetes Time Check Pod Setup Guide

Set Up Time Check Pod in Kubernetes

How to Efficiently Set Up a Time Check Pod in Kubernetes

Tasks

• Create a pod called time-check in the devops namespace. The pod should have a container named time-check, using the busybox image with the latest tag (busybox:latest).

• Create a config map named time-config with the data TIME_FREQ=12 in the same namespace.

• Configure the time-check container to run the command: while true; do date; sleep $TIME_FREQ; done. Ensure the output is written to /opt/sysops/time/time-check.log. Add an environment variable TIME_FREQ in the container, getting its value from the config map TIME_FREQ key.

• Create a volume log-volume and mount it at /opt/sysops/time within the container.

Steps

1. Create a manifest file time-check.yaml.

    apiVersion: v1
    kind: Namespace
    metadata:
      name: devops
    ---
    apiVersion: v1
    kind: ConfigMap
    metadata:
      name: time-config
      namespace: devops
    data:
      TIME_FREQ: "12"
    ---
    apiVersion: v1
    kind: Pod
    metadata:
      name: time-check
      namespace: devops
    spec:
      containers:
        - name: time-check
          image: busybox:latest
          command: ["sh", "-c", "while true; do date >> /opt/sysops/time/time-check.log; sleep $TIME_FREQ; done"]
          env:
            - name: TIME_FREQ
              valueFrom:
                configMapKeyRef:
                  name: time-config
                  key: TIME_FREQ
          volumeMounts:
            - name: log-volume
              mountPath: /opt/sysops/time
      volumes:
        - name: log-volume
          emptyDir: {}

    cat << EOF > time-check.yaml
    apiVersion: v1
    kind: Namespace
    metadata:
      name: devops
    ---
    apiVersion: v1
    kind: ConfigMap
    metadata:
      name: time-config
      namespace: devops
    data:
      TIME_FREQ: "12"
    ---
    apiVersion: v1
    kind: Pod
    metadata:
      name: time-check
      namespace: devops
    spec:
      containers:
        - name: time-check
          image: busybox:latest
          command: ["sh", "-c", "while true; do date >> /opt/sysops/time/time-check.log; sleep \$TIME_FREQ; done"]
          env:
            - name: TIME_FREQ
              valueFrom:
                configMapKeyRef:
                  name: time-config
                  key: TIME_FREQ
          volumeMounts:
            - name: log-volume
              mountPath: /opt/sysops/time
      volumes:
        - name: log-volume
          emptyDir: {}
    EOF

2. 

   Now apply

    kubectl apply -f time-check.yaml

   
3. ss