Instalar Nginx PHP 5.4 y PHP-FPM bajo Centos

Un pequeña guía de como instalar un servidor Nginx PHP 5.4 y PHP-FPM bajo Centos, primero que nada debemos agregar las repo de REMI:

## Remi Dependency on CentOS 6 64BIT##
rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-7.noarch.rpm
## Remi Dependency on CentOS 6 32BIT##
rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-7.noarch.rpm
rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm
## Remi Dependency on CentOS 5 64BIT##
rpm -Uvh http://dl.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm
## Remi Dependency on CentOS 5 32BIT##
rpm -Uvh http://dl.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm
rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-5.rpm

Ahora vamos a agregar las repo de Nginx, para ello crearemos el archivo etc/yum.repos.d/nginx.repo con el siguiente contenido:

nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/$releasever/$basearch/
gpgcheck=0
enabled=1

Instalamos los módulos Nginx, PHP 5.3.8 y PHP-FPM:

yum --enablerepo=remi,remi-test install nginx php php-fpm php-common
yum --enablerepo=remi,remi-test install php-pear php-pdo php-mysql
yum --enablerepo=remi,remi-test install php-pgsql php-pecl-memcache
yum --enablerepo=remi,remi-test install php-gd php-mbstring php-mcrypt php-xml

Los módulos que se instalarán, serán los siguientes:
 APC (php-pecl-apc)
 CLI (php-cli)
 PEAR (php-pear)
 PDO (php-pdo)
 MySQL (php-mysql
 PostgreSQL (php-pgsql)
 MongoDB (php-pecl-mongo)
 SQLite (php-sqlite)
 Memcache (php-pecl-memcache)
 Memcached (php-pecl-memcached)
 GD (php-gd)
 XML (php-xml)
 MBString (php-mbstring)
 MCrypt (php-mcrypt)
Editamos la configuración de Nginx:

vi /etc/nginx/nginx.conf

Configuración de ejemplo:

user  nginx;
worker_processes  1;
error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;
events {
    worker_connections  1024;
}
http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                                    '$status $body_bytes_sent "$http_referer" '
                                    '"$http_user_agent" "$http_x_forwarded_for"';
   access_log  /var/log/nginx/access.log  main;
   ## Proxy
   proxy_redirect off;
   proxy_set_header Host  $host;
   proxy_set_header X-Real-IP $remote_addr;
   proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
   client_max_body_size 10m;
   client_body_buffer_size 128k;
   proxy_connect_timeout  90;
   proxy_send_timeout 90;
   proxy_read_timeout   90;
   proxy_buffers 8 16k;
   proxy_buffer_size 32k;
  ## Compression
  gzip on;
  gzip_types text/plain text/css application/x-javascript
                       text/xml application/xml
                       application/xml+rss text/javascript;
  gzip_disable "MSIE [1-6].(?!.*SV1)";
  ### TCP options
  tcp_nodelay on;
  tcp_nopush on;
  keepalive_timeout 10;
  sendfile on;
   # include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;
}

Creamos nuestra carpeta de la página

cd /srv
mkdir www

y cambiamos los permisos respectivos

chown -R  nginx:nginx /srv/www

Para la configuración de un vhost, primero creamos el archivo

vi /etc/nginx/sites-available/yoursites.com

En donde veremos algo más o menos así:

Ahora para activar un sitio
sudo ln -s /etc/nginx/sites-available/yoursites.com /etc/nginx/sites-enabled/yoursites.com>

Ahora vamos a editar la configuración de php-fpm
; Start a new pool named 'www'.
[www]
; The address on which to accept FastCGI requests.
; Valid syntaxes are:
; 'ip.add.re.ss:port'    - to listen on a TCP socket to a specific address on
; a specific port;
; 'port'                 - to listen on a TCP socket to all addresses on a
;  specific port;
;  '/path/to/unix/socket' - to listen on a unix socket.
; Note: This value is mandatory.
listen = 127.0.0.1:9000
; Set listen(2) backlog. A value of '-1' means unlimited.
; Default Value: -1
;listen.backlog = -1
; List of ipv4 addresses of FastCGI clients which are allowed to connect.
; Equivalent to the FCGI_WEB_SERVER_ADDRS environment variable in the original
; PHP FCGI (5.2.2+). Makes sense only with a tcp listening socket. Each address
; must be separated by a comma. If this value is left blank, connections will be
; accepted from any ip address.
; Default Value: any
listen.allowed_clients = 127.0.0.1
; Set permissions for unix socket, if one is used. In Linux, read/write
; permissions must be set in order to allow connections from a web server. Many
; BSD-derived systems allow connections regardless of permissions.
; Default Values: user and group are set as the running user
; mode is set to 0666
;listen.owner = nginx
;listen.group = nginx
;listen.mode = 0666
; Unix user/group of processes
; Note: The user is mandatory. If the group is not set, the default user's group
;  will be used.
; RPM: apache Choosed to be able to access some dir as httpd
user =nginx
; RPM: Keep a group allowed to write in log dir.
group = nginx
; Choose how the process manager will control the number of child processes.
; Possible Values:
;  static  - a fixed number (pm.max_children) of child processes;
;  dynamic - the number of child processes are set dynamically based on the
;  following directives:
;  pm.max_children      - the maximum number of children that can
;  be alive at the same time.
;  pm.start_servers     - the number of children created on startup.
;  pm.min_spare_servers - the minimum number of children in 'idle'
;  state (waiting to process). If the number
;  of 'idle' processes is less than this
;  number then some children will be created.
;  pm.max_spare_servers - the maximum number of children in 'idle'
;  state (waiting to process). If the number
;  of 'idle' processes is greater than this
;  number then some children will be killed.
; Note: This value is mandatory.
pm = dynamic
; The number of child processes to be created when pm is set to 'static' and the
; maximum number of child processes to be created when pm is set to 'dynamic'.
; This value sets the limit on the number of simultaneous requests that will be
; served. Equivalent to the ApacheMaxClients directive with mpm_prefork.
; Equivalent to the PHP_FCGI_CHILDREN environment variable in the original PHP
; CGI.
; Note: Used when pm is set to either 'static' or 'dynamic'
; Note: This value is mandatory.
pm.max_children = 50
; The number of child processes created on startup.
; Note: Used only when pm is set to 'dynamic'
; Default Value: min_spare_servers + (max_spare_servers - min_spare_servers) / 2
pm.start_servers = 10
; The desired minimum number of idle server processes.
; Note: Used only when pm is set to 'dynamic'
; Note: Mandatory when pm is set to 'dynamic'
pm.min_spare_servers = 5
; The desired maximum number of idle server processes.
; Note: Used only when pm is set to 'dynamic'
; Note: Mandatory when pm is set to 'dynamic'
pm.max_spare_servers = 35
; The number of requests each child process should execute before respawning.
; This can be useful to work around memory leaks in 3rd party libraries. For
; endless request processing specify '0'. Equivalent to PHP_FCGI_MAX_REQUESTS.
; Default Value: 0
pm.max_requests = 500
; The URI to view the FPM status page. If this value is not set, no URI will be
; recognized as a status page. By default, the status page shows the following
; information:
;   accepted conn    - the number of request accepted by the pool;
;   pool             - the name of the pool;
;   process manager  - static or dynamic;
;   idle processes   - the number of idle processes;
;   active processes - the number of active processes;
;   total processes  - the number of idle + active processes.
; The values of 'idle processes', 'active processes' and 'total processes' are
; updated each second. The value of 'accepted conn' is updated in real time.
; Example output:
;   accepted conn:   12073
;   pool:             www
;   process manager:  static
;   idle processes:   35
;   active processes: 65
;   total processes:  100
; By default the status page output is formatted as text/plain. Passing either
; 'html' or 'json' as a query string will return the corresponding output
; syntax. Example:
;   http://www.foo.bar/status
;   http://www.foo.bar/status?json
;   http://www.foo.bar/status?html
; Note: The value must start with a leading slash (/). The value can be
;       anything, but it may not be a good idea to use the .php extension or it
;       may conflict with a real PHP file.
; Default Value: not set
;pm.status_path = /status
; The ping URI to call the monitoring page of FPM. If this value is not set, no
; URI will be recognized as a ping page. This could be used to test from outside
; that FPM is alive and responding, or to
; - create a graph of FPM availability (rrd or such);
; - remove a server from a group if it is not responding (load balancing);
; - trigger alerts for the operating team (24/7).
; Note: The value must start with a leading slash (/). The value can be
;       anything, but it may not be a good idea to use the .php extension or it
;       may conflict with a real PHP file.
; Default Value: not set
;ping.path = /ping
; This directive may be used to customize the response of a ping request. The
; response is formatted as text/plain with a 200 response code.
; Default Value: pong
;ping.response = pong
; The timeout for serving a single request after which the worker process will
; be killed. This option should be used when the 'max_execution_time' ini option
; does not stop script execution for some reason. A value of '0' means 'off'.
; Available units: s(econds)(default), m(inutes), h(ours), or d(ays)
; Default Value: 0
;request_terminate_timeout = 0
; The timeout for serving a single request after which a PHP backtrace will be
; dumped to the 'slowlog' file. A value of '0s' means 'off'.
; Available units: s(econds)(default), m(inutes), h(ours), or d(ays)
; Default Value: 0
;request_slowlog_timeout = 0
; The log file for slow requests
; Default Value: not set
; Note: slowlog is mandatory if request_slowlog_timeout is set
slowlog = /var/log/php-fpm/www-slow.log
; Set open file descriptor rlimit.
; Default Value: system defined value
;rlimit_files = 1024
; Set max core size rlimit.
; Possible Values: 'unlimited' or an integer greater or equal to 0
; Default Value: system defined value
;rlimit_core = 0
; Chroot to this directory at the start. This value must be defined as an
; absolute path. When this value is not set, chroot is not used.
; Note: chrooting is a great security feature and should be used whenever
;       possible. However, all PHP paths will be relative to the chroot
;       (error_log, sessions.save_path, ...).
; Default Value: not set
;chroot =
; Chdir to this directory at the start. This value must be an absolute path.
; Default Value: current directory or / when chroot
;chdir = /var/www
; Redirect worker stdout and stderr into main error log. If not set, stdout and
; stderr will be redirected to /dev/null according to FastCGI specs.
; Default Value: no
;catch_workers_output = yes
; Pass environment variables like LD_LIBRARY_PATH. All $VARIABLEs are taken from
; the current environment.
; Default Value: clean env
;env[HOSTNAME] = $HOSTNAME
;env[PATH] = /usr/local/bin:/usr/bin:/bin
;env[TMP] = /tmp
;env[TMPDIR] = /tmp
;env[TEMP] = /tmp
; Additional php.ini defines, specific to this pool of workers. These settings
; overwrite the values previously defined in the php.ini. The directives are the
; same as the PHP SAPI:
;   php_value/php_flag             - you can set classic ini defines which can
;                                    be overwritten from PHP call 'ini_set'.
;   php_admin_value/php_admin_flag - these directives won't be overwritten by
;                                     PHP call 'ini_set'
; For php_*flag, valid values are on, off, 1, 0, true, false, yes or no.
; Defining 'extension' will load the corresponding shared extension from
; extension_dir. Defining 'disable_functions' or 'disable_classes' will not
; overwrite previously defined php.ini values, but will append the new value
; instead.
; Default Value: nothing is defined by default except the values in php.ini and
;                specified at startup with the -d argument
;php_admin_value[sendmail_path] = /usr/sbin/sendmail -t -i -f [email protected]
;php_flag[display_errors] = off
php_admin_value[error_log] = /var/log/php-fpm/www-error.log
php_admin_flag[log_errors] = on
;php_admin_value[memory_limit] = 32M

Cambiamos los permisos de la carpeta php-fpm:
chown -R nginx:nginx /var/log/php-fpm

Y los hacemos partir
/etc/init.d/nginx start ## use restart after update
## OR ##
service nginx start ## use restart after update
/etc/init.d/php-fpm start ## use restart after update
## OR ##
service php-fpm start ## use restart after update

Si queremos que en caso de reinicio se activen automáticamente, solo debemos hacer lo siguiente:
chkconfig --add nginx
chkconfig --levels 235 nginx on
chkconfig --add php-fpm
chkconfig --levels 235 php-fpm on