Very similar, but it has a redis cache, so need to create that first. Currently it has:
root@www:~# dokku redis:list
NAME VERSION STATUS EXPOSED PORTS LINKS
www redis:3.2.3 running - -
wwwredis redis:3.2.3 running - www
so we'll name the new one wwwredis as well, although it probably does not matter. We don't need to copy the contents of the cache, but we can.
dokku plugin:install https://github.com/dokku/dokku-redis.git redis
dokku apps:create www
dokku redis:create wwwredis
dokku redis:link wwwredis www
dokku config:set www REDIS_HOST=dokku-redis-wwwredis REDIS_PORT=6379
dokku config:set www REDIS_URL=redis://dokku-redis-wwwredis:6379
dokku config:set www REDIS_HOST=dokku-redis-wwwredis REDIS_PORT=6379
dokku config:set www GH_TOKEN=<token>
Turn off passwords, add redis config to www app:
dokku redis:connect wwwredis
127.0.0.1:6379> CONFIG SET REQUIREPASS ""
Copy stuff:
dokku redis:export wwwredis > www.db
and then on the new server:
dokku redis:import wwwredis < www.db
Add Dockerfile to project, update node version, etc. and then deploy:
git remote add dokku dokku@api.r-pkg.org:www
git push dokku
Do the same dance for copying the certs from the old server.
dokku domains:add www www.r-pkg.org
dokku domains:add www r-pkg.org
tar cf cert.tar server.{key,crt}
cat cert.tar | dokku certs:add www
Edit /etc/hosts locally to test.
Update DNS. www is proxied by Cloudflare, so turn off the proxy temporarily, to make sure everything works correctly. Turn the proxy back on at the end.
dokku letsencrypt:set www email csardi.gabor@gmail.com
dokku letsencrypt:enable www
Enable proxy again.
Stop old app a couple of hours later.