nginx+keepalived负载均衡可用框架（补二 nginx安装配置）

本文链接：https://blog.youkuaiyun.com/motian06/article/details/18034655

nginx进程基于Master+Slave（worker）（奴隶主奴隶机制）多进程模型（有几个cup启动几个进程），自身具有非常稳定的子进程管理功能。在

Master进程分配模式下，Master进程永远不进行业务处理，只是进行任务分发，从而达到Master进程的存活高可靠性，Slave进程所有的业务信号

都有主进程Master发出，Slave进程所有的超时任务都会被主进程Master中止，属于非阻塞式任务模型。

1、标准库安装（标准库是一些基本的底层库，有很多软件都是依附于这些底层库）

yum -y install wget make vim install gcc gcc-c++ ncurses ncurses-devel autoconf libjpeg libjpeg-devel libpng libpng-devel freetype freetype-devel libxml2 libxml2-devel zlib zlib-devel glibc glibc-devel glib2 glib2-devel bzip2 bzip2-devel curl curl-devel e2fsprogs e2fsprogs-devel krb5 krb5-devel libidn libidn-devel openssl openssl-devel openldap openldap-devel nss_ldap openldap-clients openldap-servers pcre pcre-devel  zlip zlip-devel

有点长，直接cope就行了

2、nginx安装

wget http://nginx.org/download/nginx-1.5.8.tar.gz
tar zxvf nginx-1.5.8.tar.gz
cd nginx-1.5.8
./configure --prefix=/usr/local/webserver/nginx
make && make install

3.配置启动脚本

每次启动nginx都要找到nginx的启动目录，这样无疑很麻烦，写一个脚本实现nginx的启动、停止、重启

vi /etc/init.d/nginx

脚本如下

#!/bin/sh
#
# nginx - this script starts and stops the nginx daemin
#
# chkconfig:   - 85 15
# description:  Nginx is an HTTP(S) server, HTTP(S) reverse \
#               proxy and IMAP/POP3 proxy server
# processname: nginx
# config:      /usr/local/webserver/nginx/conf/nginx.conf
# pidfile:     /usr/local/webserver/nginx/logs/nginx.pid

# Source function library.
. /etc/rc.d/init.d/functions

# Source networking configuration.
. /etc/sysconfig/network

# Check that networking is up.
[ "$NETWORKING" = "no" ] && exit 0

nginx="/usr/local/webserver/nginx/sbin/nginx"
prog=$(basename $nginx)

NGINX_CONF_FILE="/usr/local/webserver/nginx/conf/nginx.conf"

lockfile=/var/lock/subsys/nginx

start() {
    [ -x $nginx ] || exit 5
    [ -f $NGINX_CONF_FILE ] || exit 6
    echo -n $"Starting $prog: "
    daemon $nginx -c $NGINX_CONF_FILE
    retval=$?
    echo
    [ $retval -eq 0 ] && touch $lockfile
    return $retval
}

stop() {
    echo -n $"Stopping $prog: "
    killproc $prog -QUIT
    retval=$?
    echo
    [ $retval -eq 0 ] && rm -f $lockfile
    return $retval
}

restart() {
    configtest || return $?
    stop
    start
}

reload() {
    configtest || return $?
    echo -n $"Reloading $prog: "
    killproc $nginx -HUP
    RETVAL=$?
    echo
}

force_reload() {
    restart
}

configtest() {
  $nginx -t -c $NGINX_CONF_FILE
}

rh_status() {
    status $prog
}

rh_status_q() {
    rh_status >/dev/null 2>&1
}

case "$1" in
    start)
        rh_status_q && exit 0
        $1
        ;;
    stop)
        rh_status_q || exit 0
        $1
        ;;
    restart|configtest)
        $1
        ;;
    reload)
        rh_status_q || exit 7
        $1
        ;;
    force-reload)
        force_reload
        ;;
    status)
        rh_status
        ;;
    condrestart|try-restart)
        rh_status_q || exit 0
            ;;
    *)
        echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload|configtest}"
        exit 2
esac

3、修改nginx脚本权限

chmod +x /etc/init.d/nginx（添加执行权限）

4、添加到系统服务

/sbin/chkconfig nginx on （）

5、nginx命令

service nginx start

service nginx stop

service nginx restart

service nginx reload

对应

/etc/init.d/nginx start

/etc/init.d/nginx stop