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Lab #4: Create an image with CMD instruction

beginners/dockerfile/lab4_cmd.md

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Lab #4: Create an image with CMD instruction

Pre-requisite:

Tested Infrastructure

<table class="tg"> <tr> <th class="tg-yw4l"><b>Platform</b></th> <th class="tg-yw4l"><b>Number of Instance</b></th> <th class="tg-yw4l"><b>Reading Time</b></th> </tr> <tr> <td class="tg-yw4l"><b> Play with Docker</b></td> <td class="tg-yw4l"><b>1</b></td> <td class="tg-yw4l"><b>5 min</b></td> </tr> </table>

Pre-requisite

  • Create an account with DockerHub
  • Open PWD Platform on your browser
  • Click on Add New Instance on the left side of the screen to bring up Alpine OS instance on the right side

Creating Dockerfile

FROM alpine:3.6

RUN apk update
CMD ["top"]

Building Docker Container

docker build -t ajeetraina/lab3_cmd . -f Dockerfile_cmd

Running the Docker container

docker run ajeetraina/lab3_cmd:latest

Lab #5: ENTRYPOINT instruction