docker-entrypoint.sh

#!/bin/sh
set -eu

execute_ssh(){
  echo "Execute Over SSH: $@"
  ssh -q -t -i "$HOME/.ssh/id_rsa" \
      -o UserKnownHostsFile=/dev/null \
      -o StrictHostKeyChecking=no "$INPUT_REMOTE_DOCKER_HOST" -p "$INPUT_SSH_PORT" "$@"
}

if [ -z "$INPUT_REMOTE_DOCKER_HOST" ]; then
    echo "Input remote_docker_host is required!"
    exit 1
fi

if [ -z "$INPUT_SSH_PUBLIC_KEY" ]; then
    echo "Input ssh_public_key is required!"
    exit 1
fi

if [ -z "$INPUT_SSH_PRIVATE_KEY" ]; then
    echo "Input ssh_private_key is required!"
    exit 1
fi

if [ -z "$INPUT_ARGS" ]; then
  echo "Input input_args is required!"
  exit 1
fi

if [ -z "$INPUT_STACK_FILE_NAME" ]; then
  DEPLOYMENT_COMMAND="docker-compose"
else
  # convert comma seperated filenames to docker-compose -f
  # 'a,b,c' -> '-f a -f b -f c'
  DOCKER_COMPOSE_FILE_FLAGS="$(echo "$INPUT_STACK_FILE_NAME" | sed 's/^/-f /' | sed 's/,/ -f /')"
  DEPLOYMENT_COMMAND="docker-compose $DOCKER_COMPOSE_FILE_FLAGS"
fi

if [ -z "$INPUT_SSH_PORT" ]; then
  INPUT_SSH_PORT=22
fi

DEPLOYMENT_COMMAND_OPTIONS="--host ssh://$INPUT_REMOTE_DOCKER_HOST:$INPUT_SSH_PORT"

SSH_HOST=${INPUT_REMOTE_DOCKER_HOST#*@}

echo "Registering SSH keys..."

# register the private key with the agent.
mkdir -p ~/.ssh
ls ~/.ssh
printf '%s\n' "$INPUT_SSH_PRIVATE_KEY" > ~/.ssh/id_rsa
chmod 600 ~/.ssh/id_rsa
printf '%s\n' "$INPUT_SSH_PUBLIC_KEY" > ~/.ssh/id_rsa.pub
chmod 600 ~/.ssh/id_rsa.pub
#chmod 600 "~/.ssh"
eval $(ssh-agent)
ssh-add ~/.ssh/id_rsa


echo "Add known hosts"
ssh-keyscan -p $INPUT_SSH_PORT "$SSH_HOST" >> ~/.ssh/known_hosts
ssh-keyscan -p $INPUT_SSH_PORT "$SSH_HOST" >> /etc/ssh/ssh_known_hosts
# set context
echo "Create docker context"
docker context create staging --docker "host=ssh://$INPUT_REMOTE_DOCKER_HOST:$INPUT_SSH_PORT"
docker context use staging


if  [ -n "$INPUT_DOCKER_LOGIN_PASSWORD" ] || [ -n "$INPUT_DOCKER_LOGIN_USER" ] || [ -n "$INPUT_DOCKER_LOGIN_REGISTRY" ]; then
  echo "Connecting to $INPUT_REMOTE_DOCKER_HOST... Command: docker login"
  docker login -u "$INPUT_DOCKER_LOGIN_USER" -p "$INPUT_DOCKER_LOGIN_PASSWORD" "$INPUT_DOCKER_LOGIN_REGISTRY"
fi

echo "Command: ${DEPLOYMENT_COMMAND} pull"
${DEPLOYMENT_COMMAND} ${DEPLOYMENT_COMMAND_OPTIONS} pull

echo "Command: ${DEPLOYMENT_COMMAND} ${INPUT_ARGS}"
${DEPLOYMENT_COMMAND} ${DEPLOYMENT_COMMAND_OPTIONS} ${INPUT_ARGS}