keepalived+nginx 学习笔记

ab520025520025

　　from http://www.youyou13.com
　　环境:
　　master   192.168.1.100
　　backup  192.168.1.101
　　虚拟ip  192.168.1.103
　　1.安装keepalived
　　我安装完的目录是 /usr/local/keepalive/
　　2.配置
　　keepalived.conf
　　master-------------------------------------------------------------------------------------------
　　! Configuration File for keepalived
　　global_defs {
   notification_email {
     linlin@8788.cn
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}
　　vrrp_instance VI_1 {
    state MASTER
　　interface eth0
    virtual_router_id 51
    mcast_src_ip 192.168.1.100                (master)
    priority 100                               (主机要比从机优先级高,不然不能在恢复时夺取角色)
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass youyou13.com
　　}
    virtual_ipaddress {
        192.168.1.103                 (虚拟ip)
    }
}
　　backup-----------------------------------------------------------------------------------------
　　! Configuration File for keepalived
　　global_defs {
   notification_email {
     linlin@8788.cn
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}
　　vrrp_instance VI_1 {
    state MASTER(BACKUP)
    interface eth0
    virtual_router_id 51
    mcast_src_ip 192.168.1.101                  (从机)
    priority 50         (主机要比从机优先级高,不然不能在恢复时夺取角色)
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass youyou13.com
　　}
    virtual_ipaddress {
        192.168.1.103              (虚拟ip)
    }
}
　　启动----------------------------------------------------
　　keepalived -D -f /usr/local/keepalive/etc/keepalived/keepalived.conf
　　测试----------------------------------------------------
　　1.访问192.168.1.103  成功(这时候是master在负责虚拟ip)
　　2.关闭master keepalived
　　3.访问192.168.1.103  成功(这时候是backup在负责虚拟ip)
　　日志分析------------------
　　从服务器的日志:
　　May  2 17:59:13 server Keepalived: Starting Keepalived v1.1.19 (05/02,2012)
May  2 17:59:13 server Keepalived_vrrp: Registering Kernel netlink reflector
May  2 17:59:13 server Keepalived_vrrp: Registering Kernel netlink command channel
May  2 17:59:13 server Keepalived_vrrp: Registering gratutious ARP shared channel
May  2 17:59:13 server Keepalived_vrrp: Opening file '/usr/local/keepalive/etc/keepalived/keepalived.conf'.
May  2 17:59:13 server Keepalived_vrrp: Configuration is using : 62366 Bytes
May  2 17:59:13 server Keepalived_vrrp: Using LinkWatch kernel netlink reflector...
May  2 17:59:13 server Keepalived_vrrp: VRRP_Instance(VI_1) Entering BACKUP STATE
May  2 17:59:13 server Keepalived_vrrp: VRRP sockpool: [ifindex(2), proto(112), fd(9,10)]
May  2 17:59:13 server Keepalived: Starting VRRP child process, pid=30233
（当主机宕机时的日志）
May  2 18:01:54 server Keepalived_vrrp: VRRP_Instance(VI_1) Transition to MASTER STATE
r Keepalived_vrrp: VRRP_Instance(VI_1) Entering MASTER STATE
May  2 18:01:55 server Keepalived_vrrp: VRRP_Instance(VI_1) setting protocol VIPs.
May  2 18:01:55 server Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.1.103
May  2 18:01:55 server avahi-daemon[2637]: Registering new address record for 192.168.1.103 on eth0.
May  2 18:02:00 server Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.1.103
May  2 18:02:13 server avahi-daemon[2637]: Invalid query packet.
(当主机恢复运用时)
May  3 13:28:17 server Keepalived_vrrp: VRRP_Instance(VI_1) Received higher prio advert
May  3 13:28:17 server Keepalived_vrrp: VRRP_Instance(VI_1) Entering BACKUP STATE
May  3 13:28:17 server Keepalived_vrrp: VRRP_Instance(VI_1) removing protocol VIPs.
May  3 13:28:17 server avahi-daemon[2637]: Withdrawing address record for 192.168.1.103 on eth0