When creating Docker images for websites, applications, and any service that may require any code change in the future, it’s best to build in a way that can be quickly and easily rebuilt when any changes occur. Dockerfiles provide an in-platform way to do just that. In this lab, we’ll be building a Dockerfile that can generate an image of our website that will make sure that when changes happen with the website code, we won’t have to change the Dockerfile itself!
Successfully complete this lab by achieving the following learning objectives:
- Create the Dockerfile
The Dockerfile can be created in a number of ways, so long as it meets expectations. The following nine steps are suggested:
- Define the desired container.
- Update the packages on the container.
- Install Nginx.
- Update the Nginx configuration.
- Create the location of the website files.
- Set the working directory to that of the website.
- Copy over website files, ensuring that Nginx is the owner.
- Expose port
- Run Nginx at
/tmp/nginx.pid; ensure Nginx is not set to run as a daemon.
- Test the Image
docker buildto generate an image based on the provided Dockerfile
- Create a
web01container based on the image, ensuring port
80on the container maps to
80on the host and the container is launched in the background.