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Keepalived配置vip实现故障转移
2023年06月16日 Keepalived 暂无评论 ⁄ 被围观 2,696次+

服务器:CentOS-7.x

ip:192.168.21.100、192.168.21.101、192.168.21.128

vip(虚拟ip):192.168.21.102

实现目的:

1、三台服务器运行正常的情况下,vip(虚拟ip):192.168.21.102绑定在192.168.21.100上

2、192.168.21.100宕机,vip(虚拟ip):192.168.21.102随机飘逸到192.168.21.101或者192.168.21.128其中的一台上面

3、192.168.21.100、192.168.21.101宕机,vip(虚拟ip):192.168.21.102会飘逸到192.168.21.128上面

4、192.168.21.100、192.168.21.128宕机,vip(虚拟ip):192.168.21.102会飘逸到192.168.21.101上面

5、192.168.21.100恢复,vip(虚拟ip):192.168.21.102又会飘逸到192.168.21.100上面

1、下载安装包

https://www.keepalived.org/software/keepalived-2.2.8.tar.gz

上传keepalived-2.2.8.tar.gz到/data/soft目录

2、安装依赖包

sudo yum install openssl-devel popt-devel libnl3-devel libnfnetlink-devel kernel-devel gcc

3、编译安装keepalived

sudo mkdir -p /data/server/keepalived #创建安装目录

cd /data/soft

sudo tar zxvf keepalived-2.2.8.tar.gz

cd keepalived-2.2.8

sudo ./configure --prefix=/data/server/keepalived #配置,必须看到以下提示,说明配置正确,才能继续安装

Use IPVS Framework : Yes

Use VRRP Framework : Yes

sudo make #编译

sudo make install #安装

sudo /data/server/keepalived/sbin/keepalived -v #查看版本

4、配置keepalived

拷贝配置文件

sudo cp /data/server/keepalived/etc/sysconfig/keepalived /etc/sysconfig/keepalived

sudo mkdir /etc/keepalived

sudo cp /data/server/keepalived/etc/keepalived/keepalived.conf.sample /etc/keepalived/keepalived.conf

sudo cp /data/server/keepalived/sbin/keepalived /usr/sbin/

sudo mv /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak

4.1主节点192.168.21.100配置文件

sudo vi /etc/keepalived/keepalived.conf

! 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_skip_check_adv_addr

#vrrp_strict #需要注释掉

vrrp_garp_interval 0

vrrp_gna_interval 0

}

vrrp_instance VI_1 {

state MASTER #主节点

interface ens33 #绑定vip地址的主节点网卡名称

virtual_router_id 51 #虚拟路由的ID,3个节点要一致

priority 101 #优先级高,数字越大优先级越高,取值范围:0-254

advert_int 1

authentication {

auth_type PASS #VRRP验证类型:PASS、AH两种

auth_pass 1111 #VRRP验证密码,在同一个vrrp_instance下,主、从必须使用相同的密码才能正常通信

}

virtual_ipaddress {

192.168.21.102/24 #vip地址

}

unicast_src_ip 192.168.21.100 #本地(主节点)网卡ens33的IP地址

unicast_peer {

192.168.21.101 #从节点ip地址

192.168.21.128 #从节点ip地址

}

}

:wq! #保存退出

4.2从节点192.168.21.101配置文件

vi /etc/keepalived/keepalived.conf

! 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_skip_check_adv_addr

#vrrp_strict #需要注释掉

vrrp_garp_interval 0

vrrp_gna_interval 0

}

vrrp_instance VI_1 {

state BACKUP #从节点

interface ens33 #绑定vip地址的主节点网卡名称

virtual_router_id 51 #虚拟路由的ID,3个节点要一致

priority 100 #值要小于主节点,取值范围:0-254

advert_int 1

authentication {

auth_type PASS #VRRP验证类型:PASS、AH两种

auth_pass 1111 #VRRP验证密码,在同一个vrrp_instance下,主、从必须使用相同的密码才能正常通信

}

virtual_ipaddress {

192.168.21.102/24 #vip地址

}

unicast_src_ip 192.168.21.101 #本地(从节点)网卡ens33的IP地址

unicast_peer {

192.168.21.100 #主节点ip地址

}

}

:wq! #保存退出

4.3从节点192.168.21.128配置文件

vi /etc/keepalived/keepalived.conf

! 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_skip_check_adv_addr

#vrrp_strict #需要注释掉

vrrp_garp_interval 0

vrrp_gna_interval 0

}

vrrp_instance VI_1 {

state BACKUP #从节点

interface ens33 #绑定vip地址的主节点网卡名称

virtual_router_id 51 #虚拟路由的ID,3个节点要一致

priority 99 #值要小于主节点,取值范围:0-254

advert_int 1

authentication {

auth_type PASS #VRRP验证类型:PASS、AH两种

auth_pass 1111 #VRRP验证密码,在同一个vrrp_instance下,主、从必须使用相同的密码才能正常通信

}

virtual_ipaddress {

192.168.21.102/24 #vip地址

}

unicast_src_ip 192.168.21.128 #本地(从节点)网卡ens33的IP地址

unicast_peer {

192.168.21.100 #主节点ip地址

}

}

:wq! #保存退出

5、修改启动文件

sudo mv /usr/lib/systemd/system/keepalived.service /usr/lib/systemd/system/keepalived.service.bak

sudo vi /usr/lib/systemd/system/keepalived.service

[Unit]

Description=LVS and VRRP High Availability Monitor

After=network-online.target syslog.target

Wants=network-online.target

[Service]

Type=forking

PIDFile=/run/keepalived.pid

KillMode=process

EnvironmentFile=-/etc/sysconfig/keepalived

ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS

ExecReload=/bin/kill -HUP $MAINPID

[Install]

WantedBy=multi-user.target

:wq! #保存退出

sudo systemctl daemon-reload #重新加载

sudo systemctl enable keepalived.service #设置开机自动启动

sudo systemctl disable keepalived.service #取消开机自动启动

sudo systemctl start keepalived.service #启动

sudo systemctl stop keepalived.service #停止

sudo systemctl status keepalived.service #查看状态

6、验证vip

tail -f /var/log/messages #查看日志

6.1当主节点上的keepalived服务停止时,VIP会自动绑定到从节点服务器

6.2主节点的keepalived服务恢复后,VIP又会自动绑定到主节点服务器

至此,Keepalived配置vip实现故障转移完成。

     

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