keepalived单实例与多实例

23fwerw

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

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

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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

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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

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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
[iyunv@lab-1-C6 keepalived-1.2.20]# /etc/init.d/keepalived stop
停止 keepalived：                                          [确定]
[iyunv@lab-4-C6 keepalived-1.2.20]# ip add
1: lo: <LOOPBACK,UP,LOWER_UP> 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: <BROADCAST,MULTICAST,UP,LOWER_UP> 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
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#主配置
--------------------

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#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
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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     }