VMware+centos6.5环境下keepalived+nginx实验
VMware+centos6.5环境下keepalived+nginx实验
准备工作：
下载filezilla 并安装。用来上传文件。
下载keepalived-1.2.8.tar.gz
配制2台虚拟机实验,用hosts模式,在虚拟网络编辑器页面关闭host模式的dhcp
IP地址规划（同一网络段）
192.168.40.155(主均衡节点)
192.168.40.145(从均衡节点) ,
192.168.40.252(VIP)
192.168.40.155(主均衡节点)
设置网络环境
关闭iptables和SELINUX
#chkconfig iptables off
#service iptables stop
#setenforce 0
#vi /etc/sysconfig/selinux
---------------
SELINUX=disabled
---------------
修改文件 vi /etc/sysconfig/network,配置如下
NETWORKING=yes
HOSTNAME=KPLVS1126
NETWORKING_IPV6=no
修改文件 vi /etc/sysconfig/network-scripts/ifcfg-eth0,配置如下
DEVICE="eth0"
BOOTPROTO="static"
IPV6INIT="no"
MTU="1500"
NM_CONTROLLED="no"
ONBOOT="yes"
TYPE="Ethernet"
IPADDR=192.168.40.155
PREFIX=24
ftp上传安装文件到目录 /usr/
安装nginx 忽略
安装keepalived
tar zxvfkeepalived-1.2.8.tar.gz
cdkeepalived-1.2.8
./configure--prefix=/usr/local/keepalived
make
makeinstall
配置文件
mkdir -p/etc/keepalived/
cp/usr/local/keepalived/etc/keepalived/keepalived.conf/etc/keepalived/keepalived.conf
chmod+x /etc/init.d/keepalived
vi/etc/keepalived/keepalived.conf
修改keepalived配置文件：
vi /etc/keepalived/keepalived.conf
global_defs {
router_id nginx_master
}
vrrp_script chk_http_port {
script"/etc/keepalived/check_ng.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id81
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_script {
chk_http_port
}
virtual_ipaddress {
192.168.40.252/24 dev eth0
}
}
cat /etc/keepalived/check_ng.sh
#! /bin/bash
N= 'ps -C nginx --no-header |wc -l'
if[ $N -eq 0 ];then
/usr/sbin/nginx
sleep 3
if ['ps -C nginx --no-header |wc -l' -eq 0 ];then
killall keepalived
fi
fi
192.168.40.145(从均衡节点)
设置网络环境
关闭iptables和SELINUX
#chkconfig iptables off
#service iptables stop
#setenforce 0
#vi /etc/sysconfig/selinux
---------------
SELINUX=disabled
---------------
修改文件 vi /etc/sysconfig/network,配置如下
NETWORKING=yes
HOSTNAME=KPLVS1126
NETWORKING_IPV6=no
修改文件 vi /etc/sysconfig/network-scripts/ifcfg-eth0,配置如下
DEVICE="eth0"
BOOTPROTO="static"
IPV6INIT="no"
MTU="1500"
NM_CONTROLLED="no"
ONBOOT="yes"
TYPE="Ethernet"
IPADDR=192.168.40.145
PREFIX=24
ftp上传安装文件到目录 /usr/
安装nginx 忽略
安装keepalived
tar zxvfkeepalived-1.2.8.tar.gz
cdkeepalived-1.2.8
./configure--prefix=/usr/local/keepalived
make
makeinstall
配置文件
mkdir -p/etc/keepalived/
cp/usr/local/keepalived/etc/keepalived/keepalived.conf/etc/keepalived/keepalived.conf
chmod+x /etc/init.d/keepalived
vi/etc/keepalived/keepalived.conf
修改keepalived配置文件：
vi /etc/keepalived/keepalived.conf
global_defs {
router_id nginx_master
}
vrrp_script chk_http_port {
script"/etc/keepalived/check_ng.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 81
priority 90
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_script {
chk_http_port
}
virtual_ipaddress {
192.168.40.252/24 dev eth0
}
}
cat /etc/keepalived/check_ng.sh
#! /bin/bash
N= 'ps -C nginx --no-header |wc -l'
if[ $N -eq 0 ];then
/usr/sbin/nginx
sleep 3
if ['ps -C nginx --no-header |wc -l' -eq 0 ];then
killall keepalived
fi
fi
验证虚拟ip
命令：ip a
1: lo:
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0:
link/ether 00:0c:29:f3:71:10 brd ff:ff:ff:ff:ff:ff
inet 192.168.40.145/24 brd 192.168.40.255 scope global eth0
inet 192.168.40.252/24 scope global secondary eth0
inet6 fe80::20c:29ff:fef3:7110/64 scope link
valid_lft forever preferred_lft forever
vip访问验证
在主机cmd窗口： ping 192.168.40.252
C:\Users\bbgds>ping 192.168.40.252
如下图所示，说明vip绑定成功，并能访问
正在 Ping 192.168.40.252 具有 32 字节的数据:
来自 192.168.40.252 的回复: 字节=32 时间=1ms TTL=64
来自 192.168.40.252 的回复: 字节=32 时间<1ms TTL=64
来自 192.168.40.252 的回复: 字节=32 时间<1ms TTL=64
来自 192.168.40.252 的回复: 字节=32 时间<1ms TTL=64
192.168.40.252 的 Ping 统计信息:
数据包: 已发送 = 4，已接收 = 4，丢失 = 0 (0% 丢失)，
往返行程的估计时间(以毫秒为单位):
最短 = 0ms，最长 = 1ms，平均 = 0ms