README.md

Practice Problems Pods

Read more about Pods
Tips and Tricks

For simulated Practice problems visit KillerCoda.

1. create cygnus namespace.

   Solution

   k create ns cygnus 

2. create a yaml file for namespace default.

   Solution

   k get ns default -o yaml > default-ns.yaml

3. create a pod with name alpha and image nginx in cygnus namespace.

   Solution

   k run alpha --image=nginx --restart=Never -n cygnus

4. create a pod with name theta and image nginx in default namespace and write env variables of that pod to file theta-env.txt.

   Solution

   k run theta --image=nginx
   k exec theta -ti -- env > theta-env.txt

   -- OR --

   k run theta --image=nginx -ti -- env # this will print env variables copy and paste it to theta-env.txt

5. create a pod with name beta and image nginx and container name bore.

   Solution

   k run beta --image=nginx --dry-run=client -o yaml > pod.yaml
   
   # update pod.yaml
   apiVersion: v1
   kind: Pod
   metadata:
     creationTimestamp: null
     labels:
       run: beta
     name: beta
   spec:
     containers:
     - image: nginx
       name: bore # update name here
       resources: {}
     dnsPolicy: ClusterFirst
     restartPolicy: Always
   status: {}
   
   # create pod using this yaml file
   k create -f pod.yaml

6. update image of pod created previously named beta to nginx:1.6

   Solution

   k set image pod/beta bore=nginx:1.6

7. list all the pods in all namespaces

   Solution

   k get po -A # flag to get pods from all namespaces

8. create a pod named neon and image nginx it runs env command and gets deleted after returning the environment variables.

   Solution

   k run neon --image=nginx -ti --rm -- env # --rm will delete the pod running env command

9. create a nginx pod with name delta, expose container port 80 for this pod. Run a temporary busybox pod, to make wget request to delta pod at \.

   Solution

   # create delta pod
   k run delta --image=nginx --port=80
   
   # get ip of the delta pod
   k get po -o wide # this command will return ip details of the pod
   
   # create a temp busybox pod with
   k run temp --image=busybox -ti --rm -- sh
   
   # inside the shell run
   \# wget -qO- ip:80