Install Docker.
Install the Heroku Docker plugin:
$ heroku plugins:install heroku-docker
Deploy to staging:
$ ./bin/deploy
Enable and install the Heroku Pipelines plugin:
$ heroku labs:enable pipelines
$ heroku plugins:install git://github.com/heroku/heroku-pipeline.git
Deploy to production:
$ ./bin/deploy carnival-production
While Yesod will handle some migrations (e.g. new fields) automatically for you,
anything potentially destructive requires manual intervention. Yesod also has no
support for certain database features (e.g. custom indexes). These things need
to be done by hand at a psql prompt.
The approach used in this project is to write such migrations as vanilla SQL scripts, then automatically run them as part of deployment.
The process is as follows:
- Write the needed migration under
migrations/ - Test the migration locally:
psql carnival < migrations/foo.sql(Note: You'll need to either drop/recreate your test database, or run the migration on it as well) - Deploy to staging with
bin/migrate-deploy carnival-staging foo.sql - Deploy to production with
bin/migrate-deploy carnival-production foo.sql - Multiple migration files can be passed, they will be run in the order given