Docker commands to build, push, and run containers.

docker-commands.md

Docker Image Running/Building Examples

The docker images can all be run/built similar to the following.

Variables

Setup the variables per image.

GitHub Example

registry="docker.io/"
image_path="myuser/"
image_name="myimage"
tag_name="latest"
image="${registry}${image_path}${image_name}:${tag_name}"

GitLab Example

registry="mygitlab.example.com:4567/"
image_path="mygroup/myproject/"
image_name="myimage"
tag_name="latest"
image="${registry}${image_path}${image_name}:${tag_name}"

Run the image

To run an image manually from the command line:

docker run -it --rm --name testing ${image} /bin/sh

To run an image and mount your current working directry into the image for use (at /mnt)

docker run -it --rm --name testing -v ${PWD}:/mnt ${image} /bin/sh

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How to Build a Docker Image Manually

• Build image using a Dockerfile (in the current directory)

docker build -t ${image_name}:${tag_name} .

• Run a test container from the built image to verify

docker run -it --rm --name testing ${image_name}:${tag_name} /bin/sh

• Tag the local image in preparation for a remote registry push

docker tag ${image_name}:${tag_name} ${image}

• Login to the remote registry (prompted for registry username/password)

docker login https://${registry}

• Push to the remote registry

docker push ${image}

• Optional: Additional tag latest and push

docker tag ${image_name}:${tag_name} ${registry}${image_path}${image_name}:latest
docker push ${registry}${image_path}${image_name}:latest

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