Here is a simple Dockerfile that I used to have a test app up and running:
FROM python:3.11.0a3-alpine3.15 LABEL author "David Daniel <firstname.lastname@example.org>" EXPOSE 8888/tcp RUN mkdir -p /mnt/s3data RUN mkdir -p /data RUN ln -s /mnt/s3data /data/input WORKDIR /data/input CMD python -m http.server 8888
Build a Docker Container
Assuming the name of the container is
davydany/my-docker-container, and your
current directory has a
Dockerfile, set it up like so:
docker build -t davydany/my-docker-container .
This builds the docker image and stores the built image in your local file system.
Push a Docker Container to Remote Repository
Now that your docker container has been built locally, we want to deploy the image
to a remote docker image repository. Let’s assume the hostname is
and the organization/username is
davydany, and the image is
then run this command:
docker push my-docker-hub.com/davydany/my-docker-container
Run a Built Image
Now that you have a built image locally, let’s run it by running the following command:
docker run <image-name>
If you want this image to run in the background (daemonized), run:
docker run -d <image-name>
Attach to a Running Container
To attach to a running container, run
docker ps to get the container ID of the container you want to
attach to, and then run:
docker exec -it <CONTAINER_ID> /bin/sh
This will open up a shell instance for you
Deploying to Gitlab
The first time you’re using Gitlab’s Docker Container Registry, you need to have your local
docker cli login to it.
Since this is your first time, you will need to tell
docker CLI tool to sign
into Gitlab’s Container Registry.
First, let’s get your Personal Access Token:
- Visit: https://gitlab.com/-/profile/personal_access_tokens
- For Name:, give your personal access token a name, like
- For Expires at:, leave it empty
- Under scopes, click on all the values: api, read_registry, write_registry.
- Click on Create Personal Access Token.
- Copy the token value and Save this value.
Now, we need to find your Gitlab Username:
- Visit: https://gitlab.com
- On the top right, click on your Avatar.
- Now, click on your name
- You will be redirected to a new page. Here, look for your username, which starts with a @, and typically has LastName.FirstName.RandomDigits. For me, it is @aeroxis
Now, let’s setup your
docker cli to point to Gitlab’s Docker Container Registry.
- Open your terminal, and type in
docker login gitlab.com
- For Username, Enter your username without the @ prefix. For me, this would be aeroxis.
- Press [ENTER] key.
- For Password, Enter the Personal Access Token that Gitlab generated for you.
- Press [ENTER] key.