keepalived+nginx 学习笔记
from http://www.youyou13.com环境:
master 192.168.1.100
backup192.168.1.101
虚拟ip192.168.1.103
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:
May2 17:59:13 server Keepalived: Starting Keepalived v1.1.19 (05/02,2012)
May2 17:59:13 server Keepalived_vrrp: Registering Kernel netlink reflector
May2 17:59:13 server Keepalived_vrrp: Registering Kernel netlink command channel
May2 17:59:13 server Keepalived_vrrp: Registering gratutious ARP shared channel
May2 17:59:13 server Keepalived_vrrp: Opening file '/usr/local/keepalive/etc/keepalived/keepalived.conf'.
May2 17:59:13 server Keepalived_vrrp: Configuration is using : 62366 Bytes
May2 17:59:13 server Keepalived_vrrp: Using LinkWatch kernel netlink reflector...
May2 17:59:13 server Keepalived_vrrp: VRRP_Instance(VI_1) Entering BACKUP STATE
May2 17:59:13 server Keepalived_vrrp: VRRP sockpool:
May2 17:59:13 server Keepalived: Starting VRRP child process, pid=30233
（当主机宕机时的日志）
May2 18:01:54 server Keepalived_vrrp: VRRP_Instance(VI_1) Transition to MASTER STATE
r Keepalived_vrrp: VRRP_Instance(VI_1) Entering MASTER STATE
May2 18:01:55 server Keepalived_vrrp: VRRP_Instance(VI_1) setting protocol VIPs.
May2 18:01:55 server Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.1.103
May2 18:01:55 server avahi-daemon: Registering new address record for 192.168.1.103 on eth0.
May2 18:02:00 server Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.1.103
May2 18:02:13 server avahi-daemon: Invalid query packet.
(当主机恢复运用时)
May3 13:28:17 server Keepalived_vrrp: VRRP_Instance(VI_1) Received higher prio advert
May3 13:28:17 server Keepalived_vrrp: VRRP_Instance(VI_1) Entering BACKUP STATE
May3 13:28:17 server Keepalived_vrrp: VRRP_Instance(VI_1) removing protocol VIPs.
May3 13:28:17 server avahi-daemon: Withdrawing address record for 192.168.1.103 on eth0
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