keepalived高可用双主配置
###########################lb01cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived_lb01
global_defs {
#notification_email {
#918391635@qq.com
#}
router_id LB01
}
vrrp_script check_lb {
script "/server/scripts/check_lb.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.0.0.3/24 dev eth0 label eth0:1
}
track_script {
check_lb
}
}
vrrp_instance VI_2 {
state MASTER
interface eth0
virtual_router_id 52
priority 150
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.0.0.4/24 dev eth0 label eth0:2
}
}
#######################lb02
cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived_lb01
global_defs {
#notification_email {
#918391635@qq.com
#}
router_id LB01
}
vrrp_script check_lb {
script "/server/scripts/check_lb.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 150
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.0.0.3/24 dev eth0 label eth0:1
}
track_script {
check_lb
}
}
vrrp_instance VI_2 {
state BACKUP
interface eth0
virtual_router_id 52
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.0.0.4/24 dev eth0 label eth0:2
}
}
1.1 安装
yuminsytall -y keepalived
1.2 启动
/etc/init.d/keepalived start
1.3 查看运行状态
/etc/init.d/keepalived status
1.4 修改keepalived配置文件【lb双主】
1.4.1 lb01
vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived_lb01
global_defs {
#notification_email {
#918391635@qq.com
#}
router_id LB01
}
vrrp_script check_lb {
script "/server/scripts/check_lb.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.0.0.3/24 dev eth0 label eth0:1
}
track_script {
check_lb
}
}
vrrp_instance VI_2 {
state MASTER
interface eth0
virtual_router_id 52
priority 150
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.0.0.4/24 dev eth0 label eth0:2
}
}
1.4.2 lb02
cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived_lb01
global_defs {
#notification_email {
#918391635@qq.com
#}
router_id LB02
}
vrrp_script check_lb {
#/server/scripts/下的脚本 【当nginx停止时keeplived停止】
#脚本内容
cat check_lb.sh
#!/bin/bash
count=`ps -ef |grep ginx |wc -l`
if [ $count -lt 2 ];then
/etc/init.d/keepalived stop
fi
script "/server/scripts/check_lb.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 150
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.0.0.3/24 dev eth0 label eth0:1
}
track_script {
check_lb
}
}
vrrp_instance VI_2 {
state BACKUP
interface eth0
virtual_router_id 52
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.0.0.4/24 dev eth0 label eth0:2
}
}
1.5 修改nginx配置文件【lb】
vim /application/nginx/conf/nginx.conf
worker_processes1;
events {
worker_connections1024;
}
http {
include mime.types;
default_typeapplication/octet-stream;
sendfile on;
keepalive_timeout65;
upstream web_pools {
server 10.0.0.7:80 weight=1 max_fails=3 fail_timeout=30s;
server 10.0.0.8:80 weight=1 max_fails=3 fail_timeout=30s;
}
server {
listen 10.0.0.3:80;
server_namewww.etiantian.org;
location / {
proxy_pass http://web_pools;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $remote_addr;
}
}
server {
listen 10.0.0.4:80;
server_nameblog.etiantian.org;
location / {
proxy_pass http://web_pools;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $remote_addr;
}
}
}
1.6 i查看vip
ip a s eth0
1.7 修改内核参数能监听不属于本地的网卡
echo 'net.ipv4.ip_nonlocal_bind = 1' >>/etc/sysctl.conf
sysctl -p【配置生效】
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