spawn-fcgi
1.概况
其实spawn-fcgi是lighttpd的一个分支项目，是一个cgi进程的管理器，效率不错。
2.安装
- 下载：
wget -c http://www.lighttpd.net/download/spawn-fcgi-1.6.2.tar.bz2
wget -c http://www.lighttpd.net/download/lighttpd-1.4.22.tar.bz2 #(spawn-php.sh这个文件需要从这里提取，具体在：lighttpd-1.4.22/doc/下)
- spawn-fcgi安装：
tar jxvfp spawn-fcgi-1.6.2.tar.bz2
cd spawn-fcgi-1.6.2
./configure
make
make install
3.配置
这里主要整理spawn-fcgi相关配置！
安装好后，可以通过：spawn-fcgi -h
Usage: spawn-fcgi [options] [-- <fcgiapp> [fcgi app arguments]]
spawn-fcgi v1.6.2 (ipv6) – spawns FastCGI processes
Options:
-f <path> filename of the fcgi-application (ignored if <fcgiapp> is given)
-d <directory> chdir to directory before spawning
-a <address> bind to IPv4/IPv6 address (defaults to 0.0.0.0)
-p <port> bind to TCP-port
-s <path> bind to Unix domain socket
-M <mode> change Unix domain socket mode
-C <children> (PHP only) numbers of childs to spawn (default: not setting
the PHP_FCGI_CHILDREN environment variable – PHP defaults to 0)
-F <children> number of children to fork (default 1)
-P <path> name of PID-file for spawned process (ignored in no-fork mode)
-n no fork (for daemontools)
-v show version
-?, -h show this help
(root only)
-c <directory> chroot to directory
-S create socket before chroot() (default is to create the socket in the chroot)
-u <user> change to user-id
-g <group> change to group-id (default: primary group of user if -u is given)
-U <user> change Unix domain socket owner to user-id
-G <group> change Unix domain socket group to group-id
看到详细的参数说明，不过这里为了方便，还是喜欢通过这个spawn-php.sh来管理php-cgi比较方便^_^
有个地方需要注意：spawn-php.sh这个文件有个bug，见下面红色字体部分：
# cat spawn-php.sh
#!/bin/bash
## ABSOLUTE path to the spawn-fcgi binary
SPAWNFCGI=”/usr/local/bin/spawn-fcgi“
## ABSOLUTE path to the PHP binary
FCGIPROGRAM=”/app/app/php5-fastcgi/bin/php-cgi“
## TCP port to which to bind on localhost
FCGIPORT=”9002″
## number of PHP children to spawn
PHP_FCGI_CHILDREN=10
## maximum number of requests a single PHP process can serve before it is restarted
PHP_FCGI_MAX_REQUESTS=1000
## IP addresses from which PHP should access server connections
FCGI_WEB_SERVER_ADDRS=”192.168.11.159“
pripath=”/app/wwwroot/www.ourlinux.net”
# allowed environment variables, separated by spaces
ALLOWED_ENV=”pripath PATH USER”
## if this script is run as root, switch to the following user
USERID=nobody
GROUPID=nobody
################## no config below this line
if test x$PHP_FCGI_CHILDREN = x; then
PHP_FCGI_CHILDREN=5
fi
export PHP_FCGI_MAX_REQUESTS
export FCGI_WEB_SERVER_ADDRS
ALLOWED_ENV=”$ALLOWED_ENV PHP_FCGI_MAX_REQUESTS FCGI_WEB_SERVER_ADDRS”
if test x$UID = x0; then
EX=”$SPAWNFCGI -a $FCGI_WEB_SERVER_ADDRS -p $FCGIPORT -f $FCGIPROGRAM -u $USERID -g $GROUPID -C $PHP_FCGI_CHILDREN”
else
EX=”$SPAWNFCGI -a $FCGI_WEB_SERVER_ADDRS -p $FCGIPORT -f $FCGIPROGRAM -C $PHP_FCGI_CHILDREN”
fi
# copy the allowed environment variables
E=
for i in $ALLOWED_ENV; do
E=”$E $i=${!i}”
done
# clean the environment and set up a new one
env – $E $EX
以上红色部分是要自己补上去，不然默认监听在0.0.0.0，绿色字体部分是要根据具体情况做相应的修改！蓝色字体部分是根据自己的需求加的参数，意思是：php的代码放在pripath这个变量所在的目录下，这个是为了跨机器执行php-cgi，这样可以通过proxy来调用，可以提升cpu利用率（将php-cgi进程跑在cpu消耗低的机器上）
4.后记
如果结合lvs，nginx（lighttpd等L7的负载均衡软件）、memcahced等，这样就可以很方便的实现高可用、高性能的分布式系统:)
