Module 3: Case Study - Containerization using Docker Part 1
Problem Statement: You work as a DevOps Engineer in a leading software company. You have been asked to Dockerize the applications on the production server. The company uses custom software. Therefore, there is no pre-built container which can be used.
Assume the following things:
- Assume the software to be installed is Apache
- Use an Ubuntu container
The company wants the following things:
- Push a container to Docker Hub with the above config
- The developers will not be working with Docker, hence from their side you will just get the code. Write a Dockerfile which could put the code in the custom image that you have built.
I’ll use Assignment 5 – Docker – I with the additional step of pushing to DockerHub.
Steps
When the developer provides the code, which will likely consist of multiple files, I can update the Dockerfile to incorporate this new code. Then, I’ll rebuild the image.
# Copy developer code into the appropriate directory in the container
COPY website/ /var/www/html/Similarly to what I did in Assignment 3 – Docker – I, I’ll then upload the rebuilt image to DockerHub.
I tag the image with my Docker Hub username and desired repository name (I’ll use my_docker_image as an example):
docker tag my_apache_image2:latest hectorproko/my_docker_image:my_apache_image2
Now, I push the tagged image to Docker Hub:
docker push hectorproko/my_docker_image:my_apache_image2
