Mysql database cluster and Nginx web server high availability and scalability part 2

Wordpress high availability and scalability part2

Nginx Kurulumu;

Nginx kurmak için Debian’nın kendi reposundan yararlanabilirsiniz fakat son stabil sürümüne erişemiyebilirsiniz.

Bu durum da ya Nginx’in kendi reposunu yada http://www.dotdeb.org/instructions/ reposunu kullanabilirsiniz ;)

Burada biz dotdeb reposunu kullandık.

#wget http://www.dotdeb.org/dotdeb.gpg

#sudo apt-key add dotdeb.gpg

#vi /etc/apt/source.list

deb http://packages.dotdeb.org wheezy all

deb-src http://packages.dotdeb.org wheezy all

#apt-get update

#apt-get install nginx

#apt-get install php5-fpm  php5-mysql php-pear php-apc php5-cgi php5-gd

Kurulumlar bittikten sonra , önce nginx sonra da php-fpm ayarlarını yapalım;

İlk önce nginx.conf ayarları;

#vi /etc/nginx/nginx.conf

user www-data;

worker_processes 2;

pid /var/run/nginx.pid;

events {

        worker_connections 768;

        multi_accept on;

}

http {

        ##

        # Basic Settings

        ##

        sendfile on;

        tcp_nopush on;

        tcp_nodelay on;

        keepalive_timeout 65;

        types_hash_max_size 2048;

        server_tokens off;

        server_names_hash_bucket_size 128;

        # server_name_in_redirect off;

        include /etc/nginx/mime.types;

        default_type application/octet-stream;

        ##

        # Logging Settings

        ##

        access_log /var/log/nginx/access.log;

        error_log /var/log/nginx/error.log;

        ##

        # Gzip Settings

        ##

        gzip on;

        gzip_disable "msie6";

        gzip_vary on;

        # gzip_proxied any;

        gzip_comp_level 6;

        gzip_buffers 16 8k;

        gzip_http_version 1.1;

        gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml

application/xml+rss text/javascript;

        ##

        # fs cache

        ##

#       open_file_cache max=1000 inactive=20s; open_file_cache_valid 30s; open_file_cache_min_uses 2;

#       open_file_cache_errors on;

        ##

        # Virtual Host Configs

        ##

        include /etc/nginx/conf.d/*.conf;

        include /etc/nginx/sites-enabled/*;

Aşağıdaki ayarlar wp için hazırlanmıştır.

#vi /etc/nginx/sites-available/domain.net

fastcgi_cache_path /tmp/nginx_cache levels=1:2 keys_zone=WORDPRESS:128m inactive=5m;

fastcgi_cache_key "$scheme$request_method$host$request_uri";

fastcgi_cache_use_stale error timeout invalid_header http_500;

fastcgi_ignore_headers Cache-Control Expires Set-Cookie;

server {

                        listen 80;

                        server_name domain.net;

                        access_log /var/log/nginx/access.log combined;

                        error_log /var/log/nginx/error.log info;

                        root /var/www/;

                        location / {

                                               index index.php;

                                               try_files $uri $uri/ /index.php?$args;

                        }

        location ~ "\.(js|ico|gif|jpg|png|css|jpeg)$" {

                                               root    /var/www/domain/;

                                               expires       1y;

                                               add_header Cache-Control public;

                                               access_log off;

                        }

                        location = /favicon.ico {

                                               log_not_found off;

                                               access_log off;

                        }

                        location = /robots.txt {

                                               allow all;

                                               log_not_found off;

                                               access_log off;

                        }

                        location ~ /\. {

                                               deny all;

                        }

                        location ~* /(?:uploads|files)/.*\.php$ {

                                               deny all;

                        }

                        set $skip_cache 0;

                        ## POST requests and urls with a query string should always go to PHP

                        if ($request_method = POST) {

                                               set $skip_cache 1;

                        }

                        if ($query_string != "") {

                                               set $skip_cache 1;

                        }

                        # Don't cache uris containing the following segments

                        if ($request_uri ~* "/wp-admin/|/xmlrpc.php|wp-.*.php|/feed/|index.php|sitemap(_index)?.xml") {

                                               set $skip_cache 1;

                        }

                        # Don't use the cache for logged in users or recent commenters

                        if ($http_cookie ~* "comment_author|wordpress_[a-f0-9]+|wp-postpass|wordpress_no_cache|wordpress_logged_in") {

                                               set $skip_cache 1;

                        }

                        location ~ .php$ {

                                               include fastcgi_params;

                                               fastcgi_pass unix:/var/run/php5-fpm.sock;

                                               fastcgi_cache_bypass $skip_cache;

                                fastcgi_no_cache $skip_cache;

                                               fastcgi_cache WORDPRESS;

                                               fastcgi_cache_valid  5m;

                        }

                        location ~ /purge(/.*) {

                            fastcgi_cache_purge WORDPRESS "$scheme$request_method$host$1";

                        }

}

Sembolik link oluşturmamız gerekiyor /etc/nginx/sites-enabled/ altına

#ln -s /etc/nginx/sites-available/domain.net /etc/nginx/sites-enabled/domain.net

Yaptığımız ayarlarda hata varmı test edelim.

#nginx -t 

nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

#service restart nginx

Php ayarları ;

#vi /etc/php5/fpm/php.ini

[...]

; cgi.fix_pathinfo provides *real* PATH_INFO/PATH_TRANSLATED support for CGI.  PHP's

; previous behaviour was to set PATH_TRANSLATED to SCRIPT_FILENAME, and to not grok

; what PATH_INFO is.  For more information on PATH_INFO, see the cgi specs.  Setting

; this to 1 will cause PHP CGI to fix its paths to conform to the spec.  A setting

; of zero causes PHP to behave as before.  Default is 1.  You should fix your scripts

; to use SCRIPT_FILENAME rather than PATH_TRANSLATED.

; http://php.net/cgi.fix-pathinfo

cgi.fix_pathinfo=0

[...]

502 bad gateway türü bir hata ile karşılaşmak istemiyorsanız , Php’nin 9000 porttan çalıştığına emin olun.

#vi /etc/php5/fpm/pool.d/www.conf

listen = /var/run/php5-fpm.sock  “dan”  listen = 127.0.0.1:9000

NFS kurulumu;

Biz nfs sunucusunu cluster controller  kurduk siz isterseniz başka bir makinaya sadece nfs kurabilirsiniz.

Nfs kurulumu ve nfs ten export edeceğmiz dizini web sunucularının /var/www dizinine bağlıyacağız ve wordpress dosyalarına 2 sunucuda erişebilecek.herhangi bir dosya değişikliğinde 2 sunucuda aynı anda dosyalar güncellenmiş olacak.

# apt-get install nfs-kernel-server nfs-common

#mkdir  -p /opt/wp

# chmod 755 wp/

#vi /etc/exports

/opt/wp                  nginx1-ip-adresi(rw,sync) nginx2-ip-adresi (rw,sync)

2 web sunucusunada gidip,

#apt-get install nfs-common

# mount -t nfs nfs-sunucu-ip:/opt/wp /var/www

Nfs sunucusunda aşağıdaki komutu yazdığınızda sunucuya bağlı olan clientları göreceksiniz.

# showmount –e

Wordpress dosyalarını indirelim ve nfs sunucuda ki paylaşıma atalım.(Nfs sunucu da read ,write ve sync izini verdiğimiz için bağlı olan web sunucularından birine de dosyalarınızı atabilirsiniz. )

#wget  http://wordpress.org/latest.tar.gz

#tar xvfz latest.tar.gz