Upgrade Drone 0.7 to 0.8.2

#!/bin/bash

# This upgrade assumes you are working from a Drone 0.7 instance configured
# like: https://gist.github.com/codycraven/c28ba26a720121c5eee845822511c4f0

# Get sudo
sudo echo

# Pull in Drone images we'll be using.
docker pull drone/drone:0.8.2
docker pull drone/agent:0.8.2

# Update agent environment config to change wss://DOMAIN/ws/broker to
# DOMAIN:9000.
sed -i 's#DRONE_SERVER=wss://\(.*\)/ws/broker#DRONE_SERVER=\1:9000#' /etc/drone/agent.env

# Update Drone compose configuration to add port 9000.
sudo tee /etc/drone/docker-compose.yml > /dev/null <<EOT
version: '3'
services:
  drone-server:
    image: drone/drone:0.8.2
    ports:
      - 127.0.0.1:8000:8000
      - 9000:9000
    volumes:
      - /var/lib/drone:/var/lib/drone
    restart: always
    env_file:
      - /etc/drone/server.env
  drone-agent:
    image: drone/agent:0.8.2
    command: agent
    depends_on:
      - drone-server
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    restart: always
    env_file:
      - /etc/drone/agent.env
EOT

# Open port 9000.
sudo ufw allow 9000

# Restart services
#
# We probably don't need to restart caddy, but at least we'll know if we have
# errors.
sudo systemctl restart caddy
sudo systemctl status caddy

sleep 5

sudo systemctl restart drone
sudo systemctl status drone

sleep 5

# Remove unneeded Drone 0.7 image.
docker image rm drone/drone:0.7

echo "Upgrade to Drone 0.8.2 complete"