Introduction to Busybox Pod¶

Let's learn about a pod called busybox that we will use a lot in this course for various purposes.

Busybox Docker Image¶

• BusyBox image is a Linux-based image containing many handy utilities.
• The BusyBox container image is incredibly lightweight.
• The image is less than 3 MB in size.
• Busybox image doesn't have a bash shell. It has a shell at /bin/sh.

Create Busybox Pod¶

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13

apiVersion: v1
kind: Pod
metadata:
  name: busybox
spec:
  containers:
  - name: busybox
    image: busybox
    args:
      - /bin/sh
      - -c
      - sleep 3600
  restartPolicy: Never

# Create busybox pod
kubectl apply -f busybox.yml

• The busybox container has an entrypoint /bin/sh and it has no running tasks. The process comes to an end.
• In order to keep the container alive we are making it sleep for 3600 seconds.

You can also use the following imperative command to create a busybox pod:

kubectl run busybox --image=busybox --restart=Never -- /bin/sh -c "sleep 3600"

Clean Up¶

Let's delete the busybox Pod.

kubectl delete -f busybox.yml