keepalived
实验环境
主机名 |
IP |
server1 |
172.25.60.1 |
server2 |
172.25.60.2 |
server3 |
172.25.60.3 |
server4 |
172.25.60.4 |
实验配置
[root@server1 ~]# tar zxf keepalived-2.0.6.tar.gz
[root@server4 keepalived-2.0.6]# yum install gcc -y
[root@server1 keepalived-2.0.6]# ./configure --prefix=/usr/local/keepalived --with-init=SYSV
- 按照提示安装keepalived依赖包:openssl-devel
[root@server1 keepalived-2.0.6]# yum install openssl-devel -y
[root@server1 keepalived-2.0.6]# ./configure --prefix=/usr/local/keepalived --with-init=SYSV
[root@server1 keepalived-2.0.6]# make && make install
- 给脚本一个执行权限
- 做软连接,方便管理与设置
[root@server1 ~]# ln -s /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
[root@server1 ~]# ln -s /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
[root@server1 ~]# ln -s /usr/local/keepalived/etc/keepalived/ /etc/
[root@server1 ~]# ln -s /usr/local/keepalived/sbin/keepalived /sbin/
- 将之前添加的VIP删除
- 修改配置文件:vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
##全局配置
global_defs { ##全局定义块
notification_email { ##邮件通知
root@localhost
}
notification_email_from keepalived@localhost
smtp_server 127.0.0.1 #设置 smtp server 地址
smtp_connect_timeout 30 设置连接 smtp 服务器超时时间
router_id LVS_DEVEL #load balancer 的标识 ID,用于 email 警报
vrrp_skip_check_adv_addr
#vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
}
## VRRPD配置
vrrp_instance VI_1 {
state MASTER #备机改为 BACKUP,此状态是由 priority 的值来决定的,当前priority 的值小于备机的值,那么将会失去 MASTER 状态
interface eth0 #HA 监测网络接口
virtual_router_id 51 #主、备机的 virtual_router_id 必须相同,取值 0-255
priority 100 #主机的优先级,备份机改为 50,主机优先级一定要大于备机
advert_int 1 #主备之间的通告间隔秒数
authentication {
auth_type PASS #设置验证类型,主要有 PASS 和 AH 两种
auth_pass 1111
}
##指定漂移地址(VIP),即切换到MASTER时,这些IP会被添加,切换到BACKUP时,这些IP会被删除(传给ip addr命令),所以每台服务器可以不用绑定任何的虚拟地址。
virtual_ipaddress {
172.25.33.100
}
}
## 虚拟服务配置
virtual_server 172.25.33.100 80 { #定义虚拟服务器
delay_loop 3 #定义虚拟服务器
lb_algo rr #lvs 调度算法,这里使用轮叫
lb_kind DR #LVS 是用 DR 模式
#persistence_timeout 50
protocol TCP #指定转发协议类型,有 tcp 和 udp 两种
real_server 172.25.33.2 80 { #配置服务节点
TCP_CHECK{ ##TCP方式的健康检查,realserve 的状态检测设置部分,单位是秒
weight 1 ##默认为1,0为失效
connect_timeout 3 #3 秒无响应超时
retry 3 #重试次数
delay_before_retry 3 #重试间隔
}
}
real_server 172.25.33.3 80 {
TCP_CHECK{
weight 1
connect_timeout 3
retry 3
delay_before_retry 3
}
}
}
[root@server1 keepalived]# /etc/init.d/keepalived start
[root@server2 ~]# ip addr add 172.25.60.100/32 dev eth0
[root@server2 ~]# /etc/init.d/httpd start