Linux_Keepalived_Nginx 安装笔记
环境：Vmware Workstation 10，CentOS-7-x86_64-DVD-1511.iso，Xshell 4.0，ip1：192.168.216.138，ip2：192.168.216.139.
参照[Linux_Nginx 安装笔记](http://blog.****.net/zhiguoliu11/article/details/72674811)在ip1和ip2服务器上各安装一台nginx.
参照[Linux_Keepalived 安装笔记](http://blog.****.net/zhiguoliu11/article/details/72706361)在ip1和ip2服务器上各安装一台nginx.
编辑nginx欢迎页面
[[email protected] html]# vim /usr/share/nginx/html/index.html
配置ip1上keepalived.conf文件
[[email protected] ~]# ip a
1: lo: mtu 65536 qdisc noqueue state UNKNOWN
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: eno16777736: mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:e1:1b:c5 brd ff:ff:ff:ff:ff:ff
inet 192.168.216.138/24 brd 192.168.216.255 scope global dynamic eno16777736
valid_lft 1272sec preferred_lft 1272sec
inet6 fe80::20c:29ff:fee1:1bc5/64 scope link
valid_lft forever preferred_lft forever
[[email protected] ~]# vim /etc/keepalived/keepalived.conf
配置ip2上keepalived.conf文件
[[email protected] ~]# ip a
1: lo: mtu 65536 qdisc noqueue state UNKNOWN
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: eno16777736: mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:8e:9d:5f brd ff:ff:ff:ff:ff:ff
inet 192.168.216.139/24 brd 192.168.216.255 scope global dynamic eno16777736
valid_lft 1311sec preferred_lft 1311sec
inet6 fe80::20c:29ff:fe8e:9d5f/64 scope link
valid_lft forever preferred_lft forever
[[email protected] ~]# vim /etc/keepalived/keepalived.conf
注意：下面命令中“–”是两个“-”，****显示有误。
在ip1和ip2同样的操作：
[[email protected] ~]# firewall-cmd –direct –permanent –add-rule ipv4 filter INPUT 0 –in-interface eno16777736 –destination 224.0.0.18 –protocol vrrp -j ACCEPT
success
[[email protected] ~]# firewall-cmd –reload
success
重新启动两台keepalived
[[email protected] ~]# service keepalived restart
Redirecting to /bin/systemctl restart keepalived.service
ip1主机
[[email protected] ~]# ip a
1: lo: mtu 65536 qdisc noqueue state UNKNOWN
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: eno16777736: mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:e1:1b:c5 brd ff:ff:ff:ff:ff:ff
inet 192.168.216.138/24 brd 192.168.216.255 scope global dynamic eno16777736
valid_lft 1501sec preferred_lft 1501sec
inet 192.168.216.111/32 scope global eno16777736
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fee1:1bc5/64 scope link
valid_lft forever preferred_lft forever
ip2主机
[[email protected] ~]# ip a
1: lo: mtu 65536 qdisc noqueue state UNKNOWN
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: eno16777736: mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:8e:9d:5f brd ff:ff:ff:ff:ff:ff
inet 192.168.216.139/24 brd 192.168.216.255 scope global dynamic eno16777736
valid_lft 1700sec preferred_lft 1700sec
inet6 fe80::20c:29ff:fe8e:9d5f/64 scope link
valid_lft forever preferred_lft forever
在ip1主机虚拟出来了192.168.216.111地址，而在ip2上没有。
停止ip1上的keepalived
[[email protected] ~]# service keepalived stop
Redirecting to /bin/systemctl stop keepalived.service
[[email protected] ~]# ip a
1: lo: mtu 65536 qdisc noqueue state UNKNOWN
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: eno16777736: mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:e1:1b:c5 brd ff:ff:ff:ff:ff:ff
inet 192.168.216.138/24 brd 192.168.216.255 scope global dynamic eno16777736
valid_lft 1155sec preferred_lft 1155sec
inet6 fe80::20c:29ff:fee1:1bc5/64 scope link
valid_lft forever preferred_lft forever
ip2主机
[[email protected] ~]# ip a
1: lo: mtu 65536 qdisc noqueue state UNKNOWN
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: eno16777736: mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:8e:9d:5f brd ff:ff:ff:ff:ff:ff
inet 192.168.216.139/24 brd 192.168.216.255 scope global dynamic eno16777736
valid_lft 941sec preferred_lft 941sec
inet 192.168.216.111/32 scope global eno16777736
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe8e:9d5f/64 scope link
valid_lft forever preferred_lft forever
在ip1主机没有了虚拟地址，ip2上虚拟出192.168.216.111地址。
[[email protected] ~]# less /var/log/messages