Simple mastodon docker compose upgrade script

upgrade.sh

#!/bin/bash
set -euo pipefail

cd "$(dirname "$0")" || exit 1

IMAGE_NAME='qdon/glitch'
TAG='beta'
HOSTNAME='beta.qdon.space'

rollback() {
  # Rollback
  echo "Rollback deployment"
  docker tag $IMAGE_NAME:stable $IMAGE_NAME:$TAG
  docker compose up -d
  exit 1
}

CURRENT_IMAGE_HASH=$(docker inspect -f '{{.Image}}' "qdon-web-1")
docker pull "${IMAGE_NAME}:${TAG}"
NEWER_IMAGE_HASH=$(docker inspect -f '{{.Id}}' "${IMAGE_NAME}:${TAG}")

if [[ "$CURRENT_IMAGE_HASH" == "$NEWER_IMAGE_HASH" ]]; then
  # Already newest
  exit 0
fi

# Save image
docker tag $IMAGE_NAME:$TAG $IMAGE_NAME:stable

# docker compose pull # --parallel

echo "Pre-deploy DB migrate"
docker compose run --rm -e SKIP_POST_DEPLOYMENT_MIGRATIONS=true web rails db:migrate

docker compose up -d --wait || rollback

echo "Checking HTTP response"
for retry in {1..10}; do
  echo -n "Trying $retry..."
  if curl -fso /dev/null http://localhost:3000/about -H Host:$HOSTNAME -H X-Forwarded-Proto:https; then
    echo "OK"
    break
  else
    echo "Not OK"
  fi

  if [[ $retry -eq 10 ]]; then
    rollback
  fi

  sleep "$(echo "l($retry + 1)" | bc -l)"
done

echo "Checking external access"
curl -fso /dev/null https://$HOSTNAME/about || rollback

echo "Post-deploy DB migrate"
docker compose run --rm web rails db:migrate
docker compose run --rm web tootctl cache clear
docker image prune -f

echo "OK"