This script will check if a git repo has changed every time its ran. The idea is to have a folder called "active" which is filled with multiple docker-compose files with the name of the service eg "pictshare.yml" and if a file was edited, it will redeploy this very service. If a yml file is removed, the service is shut down. This way I can manag…

autodeploy.sh

#!/bin/bash

set -euo pipefail

SIGNAL_API_URL="url to my signal rest api endpoint"
SIGNAL_SENDER="phonenumberofsignalapi"
SIGNAL_RECIPIENTS='["myphonenumber"]'

REPO_DIR="/srv/docker-swarm"
REPO_REMOTE="origin"
REPO_BRANCH="main"
STACK_DIR="$REPO_DIR/active"
DEPLOY_LOG="/var/log/last-deploy.log"
LOCKFILE="/tmp/swarm-deploy.lock"

send_signal() {
  local message="$1"
  curl -s -X POST -H "Content-Type: application/json" "$SIGNAL_API_URL" \
    -d "{\"message\": \"[SWARM] $message\", \"number\": \"$SIGNAL_SENDER\", \"recipients\": $SIGNAL_RECIPIENTS}" >/dev/null
}

# Avoid concurrent execution
exec 200>"$LOCKFILE"
flock -n 200 || exit 1

cd "$REPO_DIR"

# Fetch changes
git fetch "$REPO_REMOTE" "$REPO_BRANCH"
CHANGED_FILES=$(git diff --name-status HEAD.."$REPO_REMOTE"/"$REPO_BRANCH" -- "$STACK_DIR")

# Update repo
git pull "$REPO_REMOTE" "$REPO_BRANCH" >/dev/null

if [[ -z "$CHANGED_FILES" ]]; then
  echo "No changes."
  exit 0
fi

echo "Changes detected:"
echo "$CHANGED_FILES"

while read -r status file; do
  [[ -z "$file" ]] && continue
  stack_name=$(basename "$file" .yml)

  case "$status" in
    A|M)
      echo "Deploying $stack_name..."
      if ! docker stack deploy -c "$file" "$stack_name"; then
        send_signal "🚨 Deployment failed for $stack_name"
        else
        send_signal "✅ Successfully deployed $stack_name"
      fi
      ;;
    D)
      echo "Removing $stack_name..."
      if ! docker stack rm "$stack_name"; then
        send_signal "⚠️ Failed to remove stack $stack_name"
        else
        send_signal "✅ Successfully removed $stack_name"
      fi
      ;;
  esac
done <<< "$CHANGED_FILES"