dokku Cheat Sheet

A Programming › Docker cheat sheet in English by jejete

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App Commands

create app	`dokku apps:create <name>`
clone some app	`dokku apps:clone <name>`
destroy app	`dokku apps:destroy <name>`
list existing apps	`dokku apps:list`
rename app	`dokku apps:rename <name>`
get report for app	`dokku apps:report <name>`

Process managment

list process inside container	`dokku ps:report <name>`
rebuild container	`dokku ps:rebuild <name>`
restart process inside container	`dokku ps:restart <name>`
scale process inside container	`ps:scale <name> <proc>=<count> [<proc>=<count>]`
rename app	`dokku apps:rename <name>`
get report for app	`dokku apps:report <name>`

SCALING
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.

proxy NGINX and ports configuration

enable proxy for app	`dokku proxy:enable <app>`
disable proxy	`dokku proxy:disable <app>`
show proxy status for app	`dokku proxy:report <app>`
list proxy ports	`dokku proxy:ports <app>`
add proxy port	`dokku proxy:ports-add <app> <scheme\|http>:<host-port\|80>:<container-port\|5000>`
remove proxy port	`dokku proxy:ports-remove <app> <scheme\|http>:<host-port\|80>:<container-port\|5000>`
clear ports	`dokku proxy:ports-clear <app>`

Dokku will extract all tcp ports exposed using the EXPOSE

FROM ubuntu:14.04
EXPOSE 1234
RUN python -m SimpleHTTPServer 1234

Logs,info and ENV

get report for app	`dokku apps:report [<app>]`
get logs	`dokku logs <name>`
set env variable	`dokku config:set [--no-restart] <name> <VARIABLE>=<VALUE>`
remove env variable	`dokku config:unset [--no-restart] <name> <VARIABLE>=<VALUE>`
get DB info	`dokku postgres:info <name>`
get proxy/ports info	`dokku proxy:ports <name>`
know proxy is enable	`dokku proxy:report <name>`
get NGINX errors	`dokku nginx:error-logs <name>`

Postgres integration

create db	`dokku postgres:create <name>`
link db to app	`dokku postgres:link <db-name> <app-name>`
list db's	`dokku postgres:list`
connect via psql	`dokku postgres:connect <name>`
expose port for external connection	`dokku postgres:expose <name>`
export dump	`dokku postgres:export <name> > <file>`
destroy db	`dokku postgres:destroy <name>`
get info for db	`dokku postgres:info <name>`

after link your db to your app, the path for you db will be accesible through DATABASE_URL env var

more commands here
postgres dokku

you need install first postgres plugin with:
dokku plugin:install https://github.com/dokku/dokku-postgres.git postgres

other commands

upload public key	`cat /home/<user>/.ssh/<public-key>.pub \| ssh <user>@<ip> "sudo sshcommand acl-add dokku <key-name>"`
execute command inside docker container	`dokku --rm run <name> <command:python\|node\|npm\|> [args]`

useful links

dokku plugins	link github
CD gitlab	gitlab-ci-git-push
useful dokku ports plugin	dokku ports plugin

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