Rails Operation in Heoku

Heoku上でdeployとdbのマイグレーションやseedの流し込みをしたので簡単にまとめてみる。

基本的にはHeroku Toolbeltを利用してオペレーションをする事になり、簡単な運用方法はHeokuのサイトにまとまっています。

Getting Started with Rails 4.x on Heroku

けっこーな数のコマンドがあります。

$ heroku help
Usage: heroku COMMAND [--app APP] [command-specific-options]

Primary help topics, type "heroku help TOPIC" for more details:

  addons    #  manage addon resources
  apps      #  manage apps (create, destroy)
  auth      #  authentication (login, logout)
  config    #  manage app config vars
  domains   #  manage custom domains
  logs      #  display logs for an app
  ps        #  manage dynos (dynos, workers)
  releases  #  manage app releases
  run       #  run one-off commands (console, rake)
  sharing   #  manage collaborators on an app

Additional topics:

  account      #  manage heroku account options
  certs        #  manage ssl endpoints for an app
  drains       #  display syslog drains for an app
  fork         #  clone an existing app
  git          #  manage git for apps
  help         #  list commands and display help
  keys         #  manage authentication keys
  labs         #  manage optional features
  maintenance  #  manage maintenance mode for an app
  pg           #  manage heroku-postgresql databases
  pgbackups    #  manage backups of heroku postgresql databases
  plugins      #  manage plugins to the heroku gem
  regions      #  list available regions
  stack        #  manage the stack for an app
  status       #  check status of heroku platform
  update       #  update the heroku client
  version      #  display version

Dynoのステータスの確認

heroku ps
=== web (1X): `bin/rails server -p $PORT -e $RAILS_ENV`
web.1: up 2013/10/17 17:38:06 (~ 1h ago)

Rails Consoleもリモートの環境のものがこんな感じで使えてしまいます。

$ heroku run rails console
Running `rails console` attached to terminal... up, run.2213
Loading production environment (Rails 4.0.0)
irb(main):001:0> User.all
=> #<ActiveRecord::Relation [#<User id: 2, email: ...

rakeのCommandもheroku runとタイプするだけで走ってしまう。例えばdb:migrateだったらこんな感じ。

$  heroku run rake db:migrate
Running `rake db:migrate` attached to terminal... up, run.6382
Migrating to DeviseCreateUsers (20131014182214)
==  DeviseCreateUsers: migrating ==============================================
-- create_table(:users)
   -> 0.0243s
-- add_index(:users, :email, {:unique=>true})
   -> 0.0076s
-- add_index(:users, :reset_password_token, {:unique=>true})
   -> 0.0087s
==  DeviseCreateUsers: migrated (0.0419s) =====================================

$  heroku run rake db:seed
Running `rake db:seed` attached to terminal... up, run.6750

ただ、rake db:migrate:resetとかのDBを書き換えちゃうようなコマンドはPermissionで怒られます。

$ heroku run rake db:migrate:reset
Running `rake db:migrate:reset` attached to terminal... up, run.2597
FATAL:  permission denied for database "postgres"
DETAIL:  User does not have CONNECT privilege.

そんな時はheroku pgコマンドで対応できるっぽい。

$ heroku pg:reset DATABASE

 !    WARNING: Destructive Action
 !    This command will affect the app: $host
 !    To proceed, type "$host" or re-run this command with --confirm $host

> $host
Resetting HEROKU_POSTGRESQL_AMBER_URL (DATABASE_URL)... done

うーん。超簡単ですね。今後はDatabase周りの細かいオペレーションが必要になってくると思うので、この辺をみながらいじってみて勉強しとこっと。

• https://devcenter.heroku.com/categories/heroku-postgres
• https://devcenter.heroku.com/articles/heroku-postgresql