标签：class blog code http tar ext
keepalived+nginx双机热备+负载均衡
DEVICE=eth2:0 TYPE=Ethernet ONBOOT=yes BOOTPROTO=static DNS1=192.168.232.2 IPADDR=192.168.232.16 NETMASK=255.255.255.0 GETWAY=192.168.232.2
eth2 Link encap:Ethernet HWaddr 00:0C:29:49:90:5B
inet addr:192.168.232.135 Bcast:192.168.232.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe49:905b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:66322 errors:0 dropped:0 overruns:0 frame:0
TX packets:31860 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:67624991 (64.4 MiB) TX bytes:2723877 (2.5 MiB)
Interrupt:19 Base address:0x2000
eth2:0 Link encap:Ethernet HWaddr 00:0C:29:49:90:5B
inet addr:192.168.232.16 Bcast:192.168.232.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:19 Base address:0x2000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:22622 errors:0 dropped:0 overruns:0 frame:0
TX packets:22622 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1236328 (1.1 MiB) TX bytes:1236328 (1.1 MiB)server {
listen 8088;
server_name localhost;
location / {
root /var/www/html;
index index.html index.htm;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}
}<html> <head> <title>Welcome to nginx!</title> </head> <body bgcolor="white" text="black"> <center><h1>Welcome to nginx! 192.168.232.135</h1></center> </body> </html>
<html> <head> <title>Welcome to nginx!</title> </head> <body bgcolor="white" text="black"> <center><h1>Welcome to nginx! 192.168.232.134</h1></center> </body> </html>
! Configuration File for keepalived
global_defs {
notification_email {
#acassen@firewall.loc
#failover@firewall.loc
#sysadmin@firewall.loc
}
#notification_email_from Alexandre.Cassen@firewall.loc
#smtp_server 192.168.200.1
#smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_script chk_http_port {
script "</dev/tcp/127.0.0.1/8088"
interval 1
weight -2
}
vrrp_instance VI_1 {
state MASTER
interface eth2
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.232.16
}
track_script {
chk_http_port
}
} ! Configuration File for keepalived
global_defs {
notification_email {
#acassen@firewall.loc
#failover@firewall.loc
#sysadmin@firewall.loc
}
#notification_email_from Alexandre.Cassen@firewall.loc
#smtp_server 192.168.200.1
#smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_script chk_http_port {
script "</dev/tcp/127.0.0.1/8088"
interval 1
weight -2
}
vrrp_instance VI_1 {
state BACKUP
interface eth2
virtual_router_id 51
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.232.16
}
track_script {
chk_http_port
}
}Jun 11 18:03:10 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth1 for 192.168.232.16 Jun 11 18:03:15 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth1 for 192.168.232.16 Jun 11 19:30:44 localhost Keepalived: Terminating on signal Jun 11 19:30:44 localhost Keepalived: Stopping Keepalived v1.2.2 (06/10,2014) Jun 11 19:30:44 localhost Keepalived_vrrp: Terminating VRRP child process on signal Jun 11 19:30:44 localhost Keepalived_healthcheckers: Terminating Healthchecker child process on signal
Jun 11 19:30:50 localhost Keepalived_vrrp: VRRP_Instance(VI_1) setting protocol VIPs. Jun 11 19:30:50 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth2 for 192.168.232.16 Jun 11 19:30:50 localhost Keepalived_healthcheckers: Netlink reflector reports IP 192.168.232.16 added Jun 11 19:30:55 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth2 for 192.168.232.16
Jun 11 19:38:49 localhost Keepalived_vrrp: VRRP_Script(chk_http_port) failed Jun 11 19:38:51 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Received higher prio advert Jun 11 19:38:51 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Entering BACKUP STATE Jun 11 19:38:51 localhost Keepalived_vrrp: VRRP_Instance(VI_1) removing protocol VIPs. Jun 11 19:38:51 localhost Keepalived_healthcheckers: Netlink reflector reports IP 192.168.232.16 removed
Jun 11 19:38:52 localhost Keepalived_vrrp: VRRP_Instance(VI_1) forcing a new MASTER election Jun 11 19:38:53 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Transition to MASTER STATE Jun 11 19:38:54 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Entering MASTER STATE Jun 11 19:38:54 localhost Keepalived_vrrp: VRRP_Instance(VI_1) setting protocol VIPs. Jun 11 19:38:54 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth2 for 192.168.232.16 Jun 11 19:38:54 localhost Keepalived_healthcheckers: Netlink reflector reports IP 192.168.232.16 added Jun 11 19:38:59 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth2 for 192.168.232.16
为什么主备的参数state都是MASTER，对的你没有看错确实要都设置成一样的，不然并不能实现我们想要的VIP漂浮的效果，我测试很久才发现的.state都设置成MASTER后，会根据priority的值大小竞争来决定谁是真正的MASTER，脚本检测也是在失败的时候会把权重减去相应的值，比如原来master（181）的priority=100，如果脚本检测到端口8088无法连接，就会priority-2=98，< S-B（150）的priority（99），此时 S-B（150） 将竞争成为master，这样就实现了web应用的热备。
如果以上实验都没有问题了，那么就该nginx负载均衡的配置了，配置修改参见如下：http://blog.csdn.net/e421083458/article/details/30086413
keepalived+nginx双机热备+负载均衡,布布扣,bubuko.com
标签：class blog code http tar ext
原文地址：http://blog.csdn.net/e421083458/article/details/30092795
