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Redis接続をチェックしてからRailsサーバー起動

Last updated at Posted at 2012-01-13

はじめに

Railsでredisを使うとき,設定に

config/initializers/redis.rb
$redis = Redis.new(:host => 'localhost', :port => 6379)

のように書いて$redis.get 'key'みたいに使うけれど,これだとRedisサーバーに繋がらないとき(redisサーバーが落ちてるとか)でもアプリケーション内でredisへアクセスするまでわからない.
起動時にチェックしてほしい.

手段、コード

初期化したあとすぐにpingを飛ばす

config/initializers/redis.rb
$redis = Redis.new(:host => 'localhost', :port => 6379)
$redis.ping

繋がらない場合は例外を投げて落ちるのでより安心.

参考リンク

Redisのpingコマンド

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