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Adding new container

We are going to add myRepo as an example.

export CONTAINER_DIR=myrepo
export CONTAINER_NAME=$CONTAINER_DIR
export CONTAINER_IMAGE_NAME=plantuml/$CONTAINER_NAME

Create the container

mkdir $CONTAINER_DIR
cd $CONTAINER_DIR

Add the definition into the manifest file release-please-config.json

{
  "bump-minor-pre-major": true,
  "bump-patch-for-minor-pre-major": true,
  "release-type": "simple",
  "separate-pull-requests": true,

  "packages": {
    "otherrepo": {
      "component": "otherrepo"
    },
    "myrepo": {
      "component": "myrepo"
    }
  }
}

Use a makefile

Use the provided Makefile template replacing the variable $CONTAINER_IMAGE_NAME

envsubst '$CONTAINER_IMAGE_NAME' < ../.github/templates/Makefile.template >Makefile

Add a github workflow

Use the provided build container template replacing the variable $CONTAINER_NAME

export WF_TEMPLATE=../.github/templates/build-container-template.yml
envsubst '$CONTAINER_NAME' < "$WF_TEMPLATE" > "../.github/workflows/build-$CONTAINER_NAME.yml"

Add a version

We will use 0.1.0 as our first version

echo '0.1.0' > version.txt

# create taf myrepo-0.1.0
echo -e "$CONTAINER_NAME-$(cat version.txt)" | xargs git tag -a -m "new $CONTAINER_NAME container"

Let's create our container

Add a test script

A script named container-test.sh in the working directory of your container (/app in the container).

It will be used to test that the container image is working as expected.

mkdir -p rootfs/app
touch rootfs/app/container-test.sh
chmod +x rootfs/app/container-test.sh

echo <<EOF > rootfs/app/container-test.sh
#!/usr/bin/env bash
set -euxo pipefail

wget --spider https://plantuml.com
EOF

Create the dockerfile

Note: Don't forget to copy the container-test.sh script.

cat <<EOF >Dockerfile
FROM debian:bullseye-slim

RUN apt-get update && apt-get -y install wget

# Copy files from repository. 
# including container-test.sh
COPY ./rootfs /

# Make non-root container.
RUN groupadd --gid 1001 app && \
    useradd --uid 1001 --gid app --home /app app && \
    chown -R app:app /app

USER 1001

# Runtime execution.
WORKDIR /app

# Define default entrypoint
ENTRYPOINT ["wget"]

CMD ["--version"]
EOF

Build the container locally to test it

make build
make test
make clean