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pca-report-generator-docker πŸ’€πŸ³

GitHub Build Status CodeQL Known Vulnerabilities

Docker Image

Docker Pulls Docker Image Size (latest by date) Platforms

This is a Docker skeleton project that can be used to quickly get a new cisagov GitHub Docker project started. This skeleton project contains licensing information, as well as pre-commit hooks and GitHub Actions configurations appropriate for Docker containers and the major languages that we use.

Running

Running with Docker

To run the cisagov/example image via Docker:

docker run cisagov/example:0.0.1

Running with Docker Compose

  1. Create a docker-compose.yml file similar to the one below to use Docker Compose.

    ---
    version: "3.7"
    
    services:
      example:
        image: cisagov/example:0.0.1
        volumes:
          - type: bind
            source: <your_log_dir>
            target: /var/log
        environment:
          - ECHO_MESSAGE="Hello from docker-compose"
        ports:
          - target: 8080
            published: 8080
            protocol: tcp
  2. Start the container and detach:

    docker-compose up --detach

Using secrets with your container

This container also supports passing sensitive values via Docker secrets. Passing sensitive values like your credentials can be more secure using secrets than using environment variables. See the secrets section below for a table of all supported secret files.

  1. To use secrets, create a quote.txt file containing the values you want set:

    Better lock it in your pocket.
    
  2. Then add the secret to your docker-compose.yml file:

    ---
    version: "3.7"
    
    secrets:
      quote_txt:
        file: quote.txt
    
    services:
      example:
        image: cisagov/example:0.0.1
        volumes:
          - type: bind
            source: <your_log_dir>
            target: /var/log
        environment:
          - ECHO_MESSAGE="Hello from docker-compose"
        ports:
          - target: 8080
            published: 8080
            protocol: tcp
        secrets:
          - source: quote_txt
            target: quote.txt

Updating your container

Docker Compose

  1. Pull the new image from Docker Hub:

    docker-compose pull
  2. Recreate the running container by following the previous instructions:

    docker-compose up --detach

Docker

  1. Stop the running container:

    docker stop <container_id>
  2. Pull the new image:

    docker pull cisagov/example:0.0.1
  3. Recreate and run the container by following the previous instructions.

Image tags

The images of this container are tagged with semantic versions of the underlying example project that they containerize. It is recommended that most users use a version tag (e.g. :0.0.1).

Image:tag Description
cisagov/example:1.2.3 An exact release version.
cisagov/example:1.2 The most recent release matching the major and minor version numbers.
cisagov/example:1 The most recent release matching the major version number.
cisagov/example:edge The most recent image built from a merge into the develop branch of this repository.
cisagov/example:nightly A nightly build of the develop branch of this repository.
cisagov/example:latest The most recent release image pushed to a container registry. Pulling an image using the :latest tag should be avoided.

See the tags tab on Docker Hub for a list of all the supported tags.

Volumes

Mount point Purpose
/var/log Log storage

Ports

The following ports are exposed by this container:

Port Purpose
8080 Example only; nothing is actually listening on the port

The sample Docker composition publishes the exposed port at 8080.

Environment variables

Required

There are no required environment variables.

Optional

Name Purpose Default
ECHO_MESSAGE Sets the message echoed by this container. Hello World from Dockerfile

Secrets

Filename Purpose
quote.txt Replaces the secret stored in the example library's package data.

Building from source

Build the image locally using this git repository as the build context:

docker build \
  --build-arg VERSION=0.0.1 \
  --tag cisagov/example:0.0.1 \
  https://github.com/cisagov/example.git#develop

Cross-platform builds

To create images that are compatible with other platforms, you can use the buildx feature of Docker:

  1. Copy the project to your machine using the Code button above or the command line:

    git clone https://github.com/cisagov/example.git
    cd example
  2. Create the Dockerfile-x file with buildx platform support:

    ./buildx-dockerfile.sh
  3. Build the image using buildx:

    docker buildx build \
      --file Dockerfile-x \
      --platform linux/amd64 \
      --build-arg VERSION=0.0.1 \
      --output type=docker \
      --tag cisagov/example:0.0.1 .

New repositories from a skeleton

Please see our Project Setup guide for step-by-step instructions on how to start a new repository from a skeleton. This will save you time and effort when configuring a new repository!

Contributing

We welcome contributions! Please see CONTRIBUTING.md for details.

License

This project is in the worldwide public domain.

This project is in the public domain within the United States, and copyright and related rights in the work worldwide are waived through the CC0 1.0 Universal public domain dedication.

All contributions to this project will be released under the CC0 dedication. By submitting a pull request, you are agreeing to comply with this waiver of copyright interest.

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