HackerRank DevOps Question Solution Docker: Volume Mounting

 

1. Docker: Volume Mounting

The task is to complete a file stub "/home/ubuntu/835979-dockervolume-mounting/script.sh" with one or more steps that do the following: • Runs a new Docker container "my-container-rw" from the "busybox" image (latest tag) in interactive background mode, without pseudoTTY allocation. • Runs a new Docker container "my-container-ro" from the "busybox" image (latest tag) in interactive background mode, without pseudoTTY allocation. • Mounts an existing volume"/home/ubuntu/835979-docker-volumemounting" at "/mnt" of the "my-container-rw"container in "readwrite" mode. • Mounts an existing volume "/home/ubuntu/835979-docker-volumemounting" at "/mnt" of the "my-container-ro" container in "readonly" mode.

Note • The completed solution will be evaluated in a new, clean environment. Be sure everything is in the "/home/ubuntu/835979docker-volume-mounting" folder. • All the tasks should be done within a simple "sudo solve" execution Invoked from the question directory. • Docker is already installed. • You have sudo access.

Grading • The execution result of "docker exec my-container-ro rm /mnt/my file.txt" outputs a "read-only file system" error. • The execution result of "docker exec my-container-rw rm /mnt/my. file.txt" removes the file from both the host and all the containers.

 

Solution:

Write the below command in script.sh

#!/usr/bin/env bash

docker run -di -v /home/ubuntu/835979-docker-volume-mounting:/mnt --name my-container-rw busybox: latest

docker run -di -v /home/ubuntu/835979-docker-volume-mounting:/mnt:ro  --name my-container-ro busybox:latest

docker exec my-container-ro rm /mnt/my-file.txt

docker exec my-container-rw rm /mnt/my-file.txt

 

Then run sudo solve

 

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