Let's say you need an image, based on the latest from NGINX, with PHP, build-essential, and nano installed. I'll walk you through the process of pulling the image, running the container, accessing the container, adding the software, and committing the changes to a new image that can then be easily used as a base for your dev containers.
Pulling the image and running the container:
podman pull nginx
podman run -it --name nginx-template-base -p 8080:80 nginx
Modifying the container:
apt-get install nano
apt-get install php5
Commit the changes:
podman commit CONTAINER_ID nginx-template
The newly created template is ready and you can run using:
podman run -it --name nginx-dev -p 8080:80 nginx-template
# Summary:
When creating a container always give it a name. It makes things easier.
For example, we've created a basic alpine container with all the apps that we need called alpine_bin. From this we'll create a image template alpine_template based on alpine_bin.
podman commit alpine_bin alpine-template
From newly created template alpine_template, spin up a new container alpine_dev using:
podman run -it --name alpine-dev alpine-template
# Backup the image
podman save -o backup-alpine-template.tar alpine-template
# Push it to the docker hub
podman login -u <user>
podman push <user>/<image>
podman pull <user>/<image>
docker pull <user>/alpine-dev-template