keepalived单实例与多实例
主机信息：Nginx代理：192.168.1.201
Nginx代理：192.168.1.204
Nginx_web_1：192.168.1.202
Nginx_web_2：192.168.1.203
vip1:192.168.1.205
vip1:192.168.1.206
http://blog.运维网.com/e/u261/themes/default/images/spacer.gif
1.安装
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cd /usr/local/src/
wget http://www.keepalived.org/software/keepalived-1.2.20.tar.gz
tar xf keepalived-1.2.20.tar.gz
cd keepalived-1.2.20
./configure --prefix=/usr/local/keepalived
make && make install
cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/keepalived
chmod +x /etc/init.d/keepalived #启动脚本
-----------------------------------------------配置
sed -i "15d;14a . /usr/local/keepalived/etc/sysconfig/keepalived" /etc/init.d/keepalived
同时在上述行下添加以下内容（将keepavlied主程序所在路径导入到环境变量PATH中）：
sed -i '15a PATH="$PATH:/usr/local/keepalived/sbin"' /etc/init.d/keepalived
sed -i '16a export PATH' /etc/init.d/keepalived
#修改/etc/init.d/keepalived, 寻找大约15行左右的. /etc/sysconfig/keepalived
sed -i '14d;13a KEEPALIVED_OPTIONS="-D -f /etc/keepalived/keepalived.conf"' /usr/local/keepalived/etc/sysconfig/keepalived
#修改/usr/local/keepalived/etc/sysconfig/keepalived文件，设置正确的服务启动参数
2.单实例配置
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----------------------------------------------Master配置
mkdir/etc/keepalived
cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf
vim /etc/keepalived/keepalived.conf #主配置文件
! configuration File for keepalived
global_defs {
notification_email{
szk5043@fomail.com
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id 1 #不同keepalived.conf此ID需唯一
}
vrrp_instance VI_1{ #示例名字为VI-1，相同实例的备节点名字要和这个相同
state MASTER #状态为MASTER，备节点为BACKUP
interface eth0 #通信接口为eth0
virtual_router_id 1 #实例ID，主从需配置一致
priority 150 #优先级为150，备节点优先级必须比此数字低
advert_int 1 #通告检查间隔时间1秒
authentication {
auth_type PASS #PASS认证类型，此参数备节点设置和主节点相同
auth_pass 1234 #密码是1234，此参数备节点设置和主节点相同
}
virtual_ipadderss {
192.168.1.205/24 dev eth0 label eth0:1
}
} -----------------------------------------备配置文件
vim /etc/keepalived/keepalived.conf #备配置文件
! Configuration File for keepalived
global_defs {
notification_email {
szk5043@foxmail.com
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id 1
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 1
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.1.205/24 dev eth0 label eth0:1
}
} -----------------------------------M/S切换测试
# /etc/init.d/keepalived stop
停止 keepalived： [确定]
# ip add
1: lo:mtu 16436 qdisc noqueue state UNKNOWN
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:mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:4a:30:dd brd ff:ff:ff:ff:ff:ff
inet 192.168.1.204/24 brd 192.168.1.255 scope global eth0
inet 192.168.1.205/24 scope global secondary eth0:1
inet6 fe80::20c:29ff:fe4a:30dd/64 scope link
valid_lft forever preferred_lft forever
日志：
Feb 21 11:35:41 lab-4-C6 Keepalived_vrrp: VRRP_Instance(VI_1) Entering BACKUP STATE
Feb 21 11:35:41 lab-4-C6 Keepalived_vrrp: VRRP sockpool:
Feb 21 11:35:55 lab-4-C6 Keepalived_vrrp: VRRP_Instance(VI_1) Transition to MASTER STATE
Feb 21 11:35:56 lab-4-C6 Keepalived_vrrp: VRRP_Instance(VI_1) Entering MASTER STATE
Feb 21 11:35:56 lab-4-C6 Keepalived_vrrp: VRRP_Instance(VI_1) setting protocol VIPs.
Feb 21 11:35:56 lab-4-C6 Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.1.205
Feb 21 11:35:56 lab-4-C6 Keepalived_healthcheckers: Netlink reflector reports IP 192.168.1.205 added
3.多实例配置
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#主配置
--------------------
#前面类似部分略
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 1
priority 150
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.1.205/24 dev eth0 label eth0:1
}
vrrp_instance VI_2 {
state BACKUP
interface eth0
virtual_router_id 1
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.1.206/24 dev eth0 label eth0:2
} #备配置
---------------------------------
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 1
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.1.205/24 dev eth0 label eth0:1
}
vrrp_instance VI_2 {
state MASTER
interface eth0
virtual_router_id 1
priority 150
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.1.206/24 dev eth0 label eth0:2
}
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