New as of 0.3.14
Dokku supports rudimentary process (really container) management via the
ps <app> List processes running in app container(s) ps:rebuildall Rebuild all apps ps:rebuild <app> Rebuild an app ps:restartall Restart all deployed app containers ps:restart <app> Restart app container(s) ps:scale <app> <proc>=<count> [<proc>=<count>] Set how many processes of a given process to run ps:start <app> Start app container(s) ps:stop <app> Stop app container(s)
Dokku allows you to run multiple process types at different container counts. For example, if you had an app that contained 1 web app listener and 1 background job processor, dokku can, spin up 1 container for each process type defined in the Procfile. By default, dokku will only start a single web process (if defined.) However, if you wanted, for example, 2 job processors running simultaneously, you can modify this behavior in one of the following ways.
You can optionally create a
DOKKU_SCALE file in the root of your repository. Dokku expects this file to contain one line for every process defined in your Procfile.
Dokku can also manage scaling itself via the
ps:scale command. This command can be used to scale multiple process types at the same time.
dokku ps:scale app_name web=1 worker=2
NOTE: Dokku will always use the DOKKU_SCALE file that ships with the repo to override any local settings.
Like Heroku, we handle the
web proctype differently from others. The
web proctype is the only proctype that will invoke custom checks as defined by a CHECKS file. It is also the only proctype that will be launched in a container that is either proxied via nginx or bound to an external port.