Kubernetes Time Check Pod

 Question : The Nautilus DevOps team want to create a time check pod in a particular Kubernetes namespace and record the logs. This might be initially used only for existing purposes, but later can be implemented in a n existing cluster. Please find more details beow about the task and perform it.

Create a pod called time-check in the devops namespace. This pod should run a container called time-check container should use the busybox image with latest tag only and remember to mention tag i.e busybox:latest.

Create a config map called time-config with the data TIME_FREQ=10 in the same namespace, and volume name should be log-volume.

The time-check container should run the command: while true; do date; sleep $TIME_FREQ;done and should write the result to the location /opt/security/time/time-check.log.

The path /opt/security/time on the pod should mount a volume that lasts the lifetime of this pod.

Please Note:-  Perform the below commands based on your question server,  user name & other details that might differ. So please read the task carefully before executing it. 

All the Best 👍

Solution:  

1. At first  kubectl  utility configure and working from jump server, run below commands  

thor@jump_host /$ kubectl get namespace NAME              STATUS   AGE default           Active   8m20s kube-node-lease   Active   8m21s kube-public       Active   8m22s kube-system       Active   8m22s thor@jump_host /$ thor@jump_host /$ kubectl get pods No resources found in default namespace. thor@jump_host /$

2. create a new namespace  as per the given in the task 

  

thor@jump_host /$ kubectl create namespace devops namespace/devops created thor@jump_host /$

3.  Create a YAML  file with all the parameters, you can copy from GitLab

    https://gitlab.com/nb-tech-support/devops.git

    ( Refer Below Video for more clarity )

thor@jump_host /$ vi /tmp/time.yaml thor@jump_host /$ cat /tmp/time.yaml apiVersion: v1 kind: ConfigMap metadata:   name: time-config   namespace: devops data:   TIME_FREQ: "10" --- apiVersion: v1 kind: Pod metadata:   name: time-check   namespace: devops   labels:     app: time-check spec:   volumes:     - name: log-volume       emptyDir: {}   containers:     - name: time-check       image: busybox:latest       volumeMounts:         - mountPath: /opt/security/time           name: log-volume       envFrom:         - configMapRef:             name: time-config       command: ["/bin/sh", "-c"]       args:         [           "while true; do date; sleep $TIME_FREQ;done > /opt/security/time/time-check.log",         ] thor@jump_host /$

4.  Run the below command to create a pod

thor@jump_host /$ kubectl create -f /tmp/time.yaml configmap/time-config created pod/time-check created thor@jump_host /$

5.  Wait for  pods to get running status

      

thor@jump_host /$ kubectl get pods -n devops NAME         READY   STATUS    RESTARTS   AGE time-check   1/1     Running   0          31s thor@jump_host /$

6.  Click on Finish & Confirm to complete the task successfully

Happy Learning!!!!

Apart from this if you need more clarity,  I have made a  tutorial video on this , 

please go through and share your comments. Like and share the knowledge