CentOS5.1＋apache＋mongrelでクラスタ環境を作る

apache＋mongrelでクラスタ環境を構築したさいのメモです

環境は
OSがCentOSでruby,rails,mongrelはインストール済の環境を使用しています

▼apacheのインストール
centosにapacheをインストールします
yumでインストール



# yum install httpd

Loading "installonlyn" plugin

Setting up Install Process

Setting up repositories

Reading repository metadata in from local files

Parsing package install arguments

Resolving Dependencies




> Populating transaction set with selected packages. Please wait.

> Downloading header for httpd to pack into transaction set.


httpd-2.2.3-11.el5_1.cent 100% |=========================|  55 kB    00:00     






> Package httpd.i386 0:2.2.3-11.el5_1.centos.3 set to be updated

> Running transaction check

Dependencies Resolved
=============================================================================

 Package                 Arch       Version          Repository        Size 

=============================================================================

Updating:

 httpd                   i386       2.2.3-11.el5_1.centos.3  base              1.1 M
Transaction Summary

=============================================================================

Install      0 Package(s)         

Update       1 Package(s)         

Remove       0 Package(s)         
Total download size: 1.1 M

Is this ok [y/N]: y

Downloading Packages:

(1/1): httpd-2.2.3-11.el5 100% |=========================| 1.1 MB    00:00     

Running Transaction Test

Finished Transaction Test

Transaction Test Succeeded

Running Transaction

  Updating  : httpd                        ######################### [1/2] 

  Cleanup   : httpd                        ######################### [2/2]
Updated: httpd.i386 0:2.2.3-11.el5_1.centos.3

Complete!

次にapacheの設定を行います
httpd.confに設定を追加します
---
ProxyPass / balancer://clstr/⇒http://host/clstr/でアクセスすることになります
BalancerMember http://127.0.0.1:3010⇒クラスタを組むhostを記述します
loadfactor⇒分散の優先度の設定
keepalive⇒on:有効/off:無効
---
apacheの設定はこのサイトに詳しくのってます
http://www.asahi-net.or.jp/~aa4t-nngk/apache3.html



#vim /etc/httpd/conf/httpd.conf



  DocumentRoot "/Cent_app/app/public"

  

    Options FollowSymLinks

    AllowOverride all

    Allow from all

    Order allow,deny

  

  ProxyPass / balancer://clstr/

  

    BalancerMember http://127.0.0.1:3010 loadfactor=10 keepalive=On

    BalancerMember http://127.0.0.1:3011 loadfactor=10 keepalive=On

    BalancerMember http://127.0.0.1:3012 loadfactor=10 keepalive=On

    BalancerMember http://127.0.0.1:3013 loadfactor=10 keepalive=On

    BalancerMember http://127.0.0.1:3014 loadfactor=10 keepalive=On

    BalancerMember http://127.0.0.1:3015 loadfactor=10 keepalive=On

    BalancerMember http://127.0.0.1:3016 loadfactor=10 keepalive=On

    BalancerMember http://127.0.0.1:3017 loadfactor=10 keepalive=On

    BalancerMember http://127.0.0.1:3018 loadfactor=10 keepalive=On

    BalancerMember http://127.0.0.1:3019 loadfactor=10 keepalive=On

最後に自動起動の設定をします



# chkconfig httpd on

# chkconfig --list httpd

httpd           0:off   1:off   2:on    3:on    4:on    5:on    6:off

▼mongrel_clusterのインストール
mongrel_clusterをインストールします



# gem install mongrel_cluster

Successfully installed mongrel_cluster-1.0.5

1 gem installed

次にmongrel_clusterの設定を行います
mongrel_cluster.ymlを作成する



#cd /railsのルートディレクトリ

#mongrel_rails cluster::configure -e production -p 3010 -a 127.0.0.1 -N 10 -c /Cent_app/app/

Writing configuration file to config/mongrel_cluster.yml.

作成された mongrel_cluster.ymlを確認する
---
servers⇒起動するmongrelサーバの個数下の場合ポートが3010から3019までの10個が起動する
---



mongrel_cluster.yml

 --- 

cwd: /Cent_app/app/

log_file: log/mongrel.log

port: "3010"

environment: production

address: 127.0.0.1

pid_file: tmp/pids/mongrel.pid

servers: 10

以上で構築は完了です
mongrelをスタートさせる場合は以下のコマンドを入力してください



#cd /railsのルートディレクトリ

#mongrel_rails cluster::start