deploy.sh

#!/bin/sh

# Stop script on first error
set -e

IMAGE_NAME="maximization/autodeploy-docker"
IMAGE_TAG=$(git rev-parse --short HEAD) # first 7 characters of the current commit hash

echo "Building Docker image ${IMAGE_NAME}:${IMAGE_TAG}, and tagging as latest"
docker build -t "${IMAGE_NAME}:${IMAGE_TAG}" .
docker tag "${IMAGE_NAME}:${IMAGE_TAG}" "${IMAGE_NAME}:latest"

echo "Authenticating and pushing image to Docker Hub"
echo "${DOCKER_PASSWORD}" | docker login -u "${DOCKER_USERNAME}" --password-stdin
docker push "${IMAGE_NAME}:${IMAGE_TAG}"
docker push "${IMAGE_NAME}:latest"

# Decode SSH key
echo "${SSH_KEY}" | base64 -d > ssh_key
chmod 600 ssh_key # private keys need to have strict permission to be accepted by SSH agent

# Add production server to known hosts
echo "${SERVER_PUBLIC_KEY}" | base64 -d >> ~/.ssh/known_hosts

echo "Deploying via remote SSH"
ssh -i ssh_key "root@${SERVER_IP}" \
  "docker pull ${IMAGE_NAME}:${IMAGE_TAG} \
  && docker stop autodeploy-docker \
  && docker rm autodeploy-docker \
  && docker run --init -d --name autodeploy-docker -p 80:3000 ${IMAGE_NAME}:${IMAGE_TAG} \
  && docker system prune -af" # remove unused images to free up space

echo "Successfully deployed, hooray!"