eue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:f6:83:57 brd ff:ff:ff:ff:ff:ff
inet 192.168.222.138/24 brd 192.168.222.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet 192.168.222.133/32 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fef6:8357/64 scope link
valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 52:54:00:db:51:2f brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel master virbr0 state DOWN group default qlen 1000
link/ether 52:54:00:db:51:2f brd ff:ff:ff:ff:ff:ff
backup
[root@backup keepalived]# systemctl stop nginx.service
//此时测试的时候backup上面的nginx是要进行关闭的
[root@backup keepalived]# ss -antl
State Recv-Q Send-Q Local Address:Port Peer Address:Port Process
LISTEN 0 128 0.0.0.0:22 0.0.0.0:*
LISTEN 0 128 [::]:22 [::]:*
[root@backup keepalived]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:31:af:f9 brd ff:ff:ff:ff:ff:ff
inet 192.168.222.139/24 brd 192.168.222.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe31:aff9/64 scope link
valid_lft forever preferred_lft forever
//此时可以看见master还是主
让keepalived监控nginx负载均衡机
keepalived通过脚本来监控nginx负载均衡机的状态
在master上编写脚本
[root@master keepalived]# cd
[root@master ~]# mkdir /scripts
[root@master ~]# cd /scripts/
[root@master scripts]# vim check_nginx.sh
[root@master scripts]# cat check_nginx.sh
#!/bin/bash
nginx_status=$(ps -ef|grep -Ev "grep|$0"|grep '\bnginx\b'|wc -l)
if [ $nginx_status -lt 1 ];then
systemctl stop keepalived
fi
[root@master scripts]# chmod +x check_nginx.sh
[root@master scripts]# ll
total 4
-rwxr-xr-x. 1 root root 142 Oct 8 23:21 check_nginx.sh
[root@master scripts]# vim notify.sh
[root@master scripts]# cat notify.sh
#!/bin/bash
case "$1" in
master)
nginx_status=$(ps -ef|grep -Ev "grep|$0"|grep '\bnginx\b'|wc -l)
if [ $nginx_status -lt 1 ];then
systemctl start nginx
fi
;;
backup)
nginx_status=$(ps -ef|grep -Ev "grep|$0"|grep '\bnginx\b'|wc -l)
if [ $nginx_status -gt 0 ];then
systemctl stop nginx
fi
;;
*)
echo "Usage:$0 master|backup VIP"
;;
esac
[root@master scripts]# chmod +x notify.sh
[root@master scripts]# ll
total 8
-rwxr-xr-x. 1 root root 142 Oct 8 23:21 check_nginx.sh
-rwxr-xr-x. 1 root root 383 Oct 8 23:31 notify.sh
[root@master scripts]# scp check_nginx.sh 192.168.222.139:/scripts/
root@1