keepAlived主备及双主
Posted happydreamzjl
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nginx用默认配置即可
1、主备配置
1、主keepAlived配置
vrrp_instance VI_1 state MASTER #主备区分 interface eth0 virtual_router_id 51 #主备一致 priority 100 #主备区分 advert_int 1 authentication auth_type PASS auth_pass 1111 virtual_ipaddress 192.168.244.200 track_script chk_nginx2、备keepAlived配置
vrrp_instance VI_1 state BACKUP #主备区分 interface eth0 virtual_router_id 51 #主备一致 priority 50 #主备区分 advert_int 1 authentication auth_type PASS auth_pass 1111 virtual_ipaddress 192.168.244.200
2、互为主备
1、第一台keepAlived配置
vrrp_instance VI_1 state MASTER interface eth0 virtual_router_id 51 priority 100 advert_int 1 authentication auth_type PASS auth_pass 1111 virtual_ipaddress 192.168.244.200 vrrp_instance VI_2 state BACKUP interface eth0 virtual_router_id 52 priority 50 advert_int 1 authentication auth_type PASS auth_pass 2222 virtual_ipaddress 192.168.244.2012、第二台keepAlived配置
vrrp_instance VI_1 state BACKUP interface eth0 virtual_router_id 51 priority 50 advert_int 1 authentication auth_type PASS auth_pass 1111 virtual_ipaddress 192.168.244.200 vrrp_instance VI_2 state MASTER interface eth0 virtual_router_id 52 priority 100 advert_int 1 authentication auth_type PASS auth_pass 2222 virtual_ipaddress 192.168.244.201
3、检测nginx，实现主备高可用
1、第一台keepAlived配置
vrrp_script chk_nginx script "/zjl/program/nginx/conf/checkNginxAlived.sh" interval 2 weight 2 vrrp_instance VI_1 state MASTER interface eth0 virtual_router_id 51 priority 100 advert_int 1 authentication auth_type PASS auth_pass 1111 virtual_ipaddress 192.168.244.200 track_script chk_nginx vrrp_instance VI_2 state BACKUP interface eth0 virtual_router_id 52 priority 50 advert_int 1 authentication auth_type PASS auth_pass 2222 virtual_ipaddress 192.168.244.201 track_script chk_nginx2、第二台keepAlived配置
vrrp_script chk_nginx script "/zjl/program/nginx/conf/checkNginxAlived.sh" interval 2 weight 2 vrrp_instance VI_1 state BACKUP interface eth0 virtual_router_id 51 priority 50 advert_int 1 authentication auth_type PASS auth_pass 1111 virtual_ipaddress 192.168.244.200 track_script chk_nginx vrrp_instance VI_2 state MASTER interface eth0 virtual_router_id 52 priority 100 advert_int 1 authentication auth_type PASS auth_pass 2222 virtual_ipaddress 192.168.244.201 track_script chk_nginx3、监测脚本
#!/bin/bash psnginx=`ps -C nginx --no-heading|wc -l` if [ $psnginx == 0 ] ; then echo "nginx服务已关闭，尝试重新启动..." /zjl/commond/nginxbegin-start.sh sleep 3 if [ `ps -C nginx --no-heading|wc -l` -eq 0 ] ; then echo "nginx尝试启动失败关闭keepAlived" killall keepalived else echo "nginx重新启动成功" fi else echo "nginx服务正常..." fi
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