keepalived单实例与多实例

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local 主机信息资料分享

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://file:///C:/Users/szk/AppData/Local/YNote/data/qqC911E522586952C3F413B8CDDA09F207/ff8f450fb00946aaa3511195da1169e3/clipboard.png

1.安装
___________________________________________________________

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
___________________________________________________________

----------------------------------------------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
[root@lab-1-C6 keepalived-1.2.20]# /etc/init.d/keepalived stop
停止 keepalived：                                        [确定]
[root@lab-4-C6 keepalived-1.2.20]# 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[2597]: VRRP_Instance(VI_1) Entering BACKUP STATE
Feb 21 11:35:41 lab-4-C6 Keepalived_vrrp[2597]: VRRP sockpool: [ifindex(2), proto(112), unicast(0), fd(10,11)]
Feb 21 11:35:55 lab-4-C6 Keepalived_vrrp[2597]: VRRP_Instance(VI_1) Transition to MASTER STATE
Feb 21 11:35:56 lab-4-C6 Keepalived_vrrp[2597]: VRRP_Instance(VI_1) Entering MASTER STATE
Feb 21 11:35:56 lab-4-C6 Keepalived_vrrp[2597]: VRRP_Instance(VI_1) setting protocol VIPs.
Feb 21 11:35:56 lab-4-C6 Keepalived_vrrp[2597]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.1.205
Feb 21 11:35:56 lab-4-C6 Keepalived_healthcheckers[2596]: Netlink reflector reports IP 192.168.1.205 added

3.多实例配置
___________________________________________________________
#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
}

2016-04-21 14:13 举报评分