Nginx 负载均衡 apache https 之 keepalived 配置

宇文氏

　　继续我的负载均衡配置，今天配置到nginx 的主备模式，采用 keepalived


我的配置如下：

1、安装 keepalived,作为Nginx 的HA

keepalived 下载地址 http://www.keepalived.org/download.html，我下载的是 keepalived-1.1.20.tar.gz，


2、解压 安装

# tar -xzvf keepalived-1.1.20.tar.gz

# cd keepalived-1.1.20

# ./configure --prefix=/usr/local/keepalived  

#make   

#make install  

#cp /usr/local/keepalived/sbin/keepalived /usr/sbin/  

#cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/  

#cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/  

#mkdir /etc/keepalived  

#cd /etc/keepalived/
　　vi keepalived.conf  #编写配置文件(主ngingx配置)
　　! Configuration File for keepalived 
 global_defs { 
    notification_email { 
   test@test.com 
         } 
    notification_email_from keepalived@chtopnet.com 
    smtp_server 127.0.0.1 
    smtp_connect_timeout 30 
    router_id LVS_DEVEL 
 } 
 vrrp_instance VI_1 { 
     state MASTER 
     interface eth0 
     virtual_router_id 51 
     mcast_src_ip 10.2.2.136  #主ngingx ip
     priority 101
     advert_int 1 
     authentication { 
         auth_type PASS 
         auth_pass chtopnet 
     } 
     virtual_ipaddress { 
         10.2.2.137                     #vip ip地址
     } 
 }
　　启动keepalived
　　#service keepalived start
　　查看 keepalived状态
　　[iyunv@localhost src]#  ps -ef | grep keepalived
root      4783     1  0 09:49 ?        00:00:00 keepalived -D
root      4784  4783  0 09:49 ?        00:00:01 keepalived -D
root      5191  4896  0 13:43 pts/2    00:00:00 grep keepalived
　　查看日志
　　Nov 27 07:18:59 localhost Keepalived: Starting Keepalived v1.1.20 (11/27,2010)
Nov 27 07:18:59 localhost Keepalived: Starting VRRP child process, pid=6940
Nov 27 07:18:59 localhost Keepalived_vrrp: Registering Kernel netlink reflector
Nov 27 07:18:59 localhost Keepalived_vrrp: Registering Kernel netlink command channel
Nov 27 07:18:59 localhost Keepalived_vrrp: Registering gratutious ARP shared channel
Nov 27 07:18:59 localhost Keepalived_vrrp: Opening file '/etc/keepalived/keepalived.conf'.
Nov 27 07:18:59 localhost Keepalived_vrrp: Configuration is using : 35726 Bytes
Nov 27 07:18:59 localhost Keepalived_vrrp: Using LinkWatch kernel netlink reflector...
Nov 27 07:19:00 localhost Keepalived_vrrp: VRRP sockpool: [ifindex(2), proto(112), fd(9,10)]
Nov 27 07:19:01 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Transition to MASTER STATE
Nov 27 07:19:02 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Entering MASTER STATE
Nov 27 07:19:02 localhost Keepalived_vrrp: VRRP_Instance(VI_1) setting protocol VIPs.
Nov 27 07:19:02 localhost avahi-daemon[2832]: Registering new address record for 10.2.2.137 on eth0.
Nov 27 07:19:02 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 10.2.2.137
　　查看ip，ip浮动已经绑定到主nginx上了，当主机宕机，备机工作是，浮动ip会绑定到备机上
　　[iyunv@localhost ~]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
    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 qlen 1000
    link/ether 00:0c:29:6a:9d:0e brd ff:ff:ff:ff:ff:ff
    inet 10.2.2.136/21brd 10.2.7.255 scope global eth0
    inet 10.2.2.137/32scope global eth0
    inet6 fe80::20c:29ff:fe6a:9d0e/64 scope link
       valid_lft forever preferred_lft forever
3: sit0: <NOARP> mtu 1480 qdisc noop
    link/sit 0.0.0.0 brd 0.0.0.0
　　这样主ngingx服务器就配置好了，然后配置备机
　　3、配置步骤同上，解压，安装，只是配置文件略有不同
　　[iyunv@localhost src]# cat /etc/keepalived/keepalived.conf
 ! Configuration File for keepalived
 global_defs {
    notification_email {
    test@test.com
         }
    notification_email_from keepalived@chtopnet.com
    smtp_server 127.0.0.1
    smtp_connect_timeout 30
    router_id LVS_DEVEL
 }
 vrrp_instance VI_1 {
     state BACKUP
     interface eth0
     virtual_router_id 51
     mcast_src_ip 10.2.2.127
     priority 100
     advert_int 1
     authentication {
         auth_type PASS
         auth_pass chtopnet
     }
     virtual_ipaddress {
         10.2.2.137
     }
 }
　　查看备机日志
　　[iyunv@localhost ~]# tail /var/log/messages       
Nov 26 14:19:24 localhost Keepalived: Starting Keepalived v1.1.20 (11/26,2010)
Nov 26 14:19:24 localhost Keepalived_vrrp: Registering Kernel netlink reflector
Nov 26 14:19:24 localhost Keepalived_vrrp: Registering Kernel netlink command channel
Nov 26 14:19:24 localhost Keepalived_vrrp: Registering gratutious ARP shared channel
Nov 26 14:19:24 localhost Keepalived: Starting VRRP child process, pid=5282
Nov 26 14:19:24 localhost Keepalived_vrrp: Opening file '/etc/keepalived/keepalived.conf'.
Nov 26 14:19:24 localhost Keepalived_vrrp: Configuration is using : 35734 Bytes
Nov 26 14:19:24 localhost Keepalived_vrrp: Using LinkWatch kernel netlink reflector...
Nov 26 14:19:24 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Entering BACKUP STATE
Nov 26 14:19:24 localhost Keepalived_vrrp: VRRP sockpool: [ifindex(2), proto(112), fd(9,10)]
　　验证：
　　一直ping 10.2.2.137  ,然后将主nginx的network停掉，可以看到大概有2个timeout，BACKUP在极短的时间内接替了工作。再将主的network开启，可以看到主又继续接替了BACKUP，继续工作
　　查看备机的日志
　　[iyunv@localhost ~]# tail /var/log/messages
Nov 26 14:19:24 localhost Keepalived_vrrp: Configuration is using : 35734 Bytes
Nov 26 14:19:24 localhost Keepalived_vrrp: Using LinkWatch kernel netlink reflector...
Nov 26 14:19:24 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Entering BACKUP STATE
Nov 26 14:19:24 localhost Keepalived_vrrp: VRRP sockpool: [ifindex(2), proto(112), fd(9,10)]
Nov 26 14:24:43 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Transition to MASTER STATE
Nov 26 14:24:44 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Entering MASTER STATE
Nov 26 14:24:44 localhost Keepalived_vrrp: VRRP_Instance(VI_1) setting protocol VIPs.
Nov 26 14:24:44 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 10.2.2.137
Nov 26 14:24:44 localhost avahi-daemon[2831]: Registering new address record for 10.2.2.137 on eth0.
Nov 26 14:24:49 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 10.2.2.137
　　配置完成！
　　参考文档
　　http://sunqi.iyunv.com/blog/735528
　　http://network.iyunv.com/art/201007/209823_2.htm