高集成：keepalived
负载均衡：nginx
1、服务器IP
Client: 172.25.254.25
Keepalived+Nginx1: 172.25.254.115 Vip: 172.25.254.100
Keepalived+Nginx2: 172.25.254.215 Vip: 172.25.254.100
二、安装
1、安装keepalived
yum install keepalived
2、编译安装Nginx
[root@node1 ~]
#useradd -r nginx
[root@node1 ~]
#yum -y groupinstall "Development tools" "Server Platform Development"
[root@node1 ~]
#yum -y install pcre-devel
[root@node1 ~]
#tar xf nginx-1.4.2.tar.gz
[root@node1 ~]
#cd nginx-1.4.2
[root@node1 nginx-1.4.2]
# ./configure \
--prefix=
/usr
\
--sbin-path=
/usr/sbin/nginx
\
--conf-path=
/etc/nginx/nginx
.conf \
--error-log-path=
/var/log/nginx/error
.log \
--http-log-path=
/var/log/nginx/access
.log \
--pid-path=
/var/run/nginx/nginx
.pid \
--lock-path=
/var/lock/nginx
.lock \
--user=nginx \
--group=nginx \
--with-http_ssl_module \
--with-http_flv_module \
--with-http_stub_status_module \
--with-http_gzip_static_module \
--http-client-body-temp-path=
/var/tmp/nginx/client/
\
--http-proxy-temp-path=
/var/tmp/nginx/proxy/
\
--http-fastcgi-temp-path=
/var/tmp/nginx/fcgi/
\
--http-uwsgi-temp-path=
/var/tmp/nginx/uwsgi
\
--http-scgi-temp-path=
/var/tmp/nginx/scgi
\
--with-pcre
提示：在两台服务器上都要安装Nginx
[root@node1 nginx-1.4.2]# service nginx start
Starting nginx: [ OK ]
三、实现高可用
1、修改配置keepalived
[root@node1 ~]
# cd /etc/keepalived
[root@node1 keepalived]
# mv keepalived.conf keepalived.conf.bak
[root@node1 keepalived]
#vim keepalived.conf
! Configuration File
for
keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from kaadmin@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_script chk_nginx {
script
"killall -0 nginx"
interval 1
weight 2
}
vrrp_instance VI_10 {
state MASTER
interface eth0
virtual_router_id 131
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 123456
}
virtual_ipaddress {
172.16.3.100
}
track_script {
chk_nginx
}
|
| 3、验证 |
[root@node1 ~]
# ip addr
1: lo:
link
/loopback
00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1
/8
scope host lo
inet6 ::1
/128
scope host
valid_lft forever preferred_lft forever
2: eth0:
link
/ether
00:0c:29:65:a0:2f brd ff:ff:ff:ff:ff:ff
inet 172.16.3.3
/16
brd 172.16.255.255 scope global eth0
inet 172.16.3.100
/32
scope global eth0
# Vip此时在Keepalived+Nginx1上
inet6 fe80::20c:29ff:fe65:a02f
/64
scope link
valid_lft forever preferred_lft forever
|
然后关闭Keepalived+Nginx1上的keepalived服务Vip会跳转到Keepalived上
四、实现负载均衡
1、修改Keepalived配置文件
Keepalived+Nginx1：
[root@node1 ~]
# cd /etc/keepalived
[root@node1 keepalived]
# mv keepalived.conf keepalived.conf.bak # 备份keepalived配置文件
[root@node1 keepalived]
#vim keepalived.conf # 创建配置文件，如下
! Configuration File
for
keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from kaadmin@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_script chk_nginx {
script
"killall -0 nginx"
interval 1
weight 2
}
vrrp_instance VI_10 {
state MASTER
interface eth0
virtual_router_id 131
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 123456
}
virtual_ipaddress {
172.16.3.100
}
track_script {
chk_nginx
}
vrrp_instance VI_20 {
state BACKUP
interface eth0
virtual_router_id 132
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass 123456
}
virtual_ipaddress {
172.16.3.200
}
track_script {
chk_nginx
}
}
|
Keepalived+Nginx2 同理
[root@node2 ~]
# cd /etc/keeplived
[root@node2 keepalived]
# mv keepalived.conf keepalived.conf.bak
[root@node2 keepalived]
# vim keepalived.conf
! Configuration File
for
keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from kaadmin@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_script chk_nginx {
script
"killall -0 nginx"
interval 1
weight 2
}
vrrp_instance VI_10 {
state BACKUP
interface eth0
virtual_router_id 131
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass 123456
}
virtual_ipaddress {
172.16.3.100
}
track_script {
chk_nginx
}
}
vrrp_instance VI_20 {
state MASTER
interface eth0
virtual_router_id 132
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 123456
}
virtual_ipaddress {
172.16.3.200
}
track_script {
chk_nginx
}
2、重启Keepalived服务 |
[root@node1 ~]
# service keepalived restart
[root@node2 ~]
# service keepalived restart
|
3、验证
[root@node2 ~]
# ip addr show
1: lo:
link
/loopback
00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1
/8
scope host lo
inet6 ::1
/128
scope host
valid_lft forever preferred_lft forever
2: eth0:
link
/ether
00:0c:29:52:ee:44 brd ff:ff:ff:ff:ff:ff
inet 172.16.3.4
/16
brd 172.16.255.255 scope global eth0
inet 172.16.3.200
/32
scope global eth0
#此时vip2在Keepalived+Nginx2上
inet6 fe80::20c:29ff:fe52:ee44
/64
scope link
valid_lft forever preferred_lft forever
|
4、关闭Keepalived+Nginx2上的Keepalived服务模拟故障，vip2会转移到Keepalived+Nginx1上，反之依然
[root@node1 ~]
# ip addr show
1: lo:
link
/loopback
00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1
/8
scope host lo
inet6 ::1
/128
scope host
valid_lft forever preferred_lft forever
2: eth0:
link
/ether
00:0c:29:65:a0:2f brd ff:ff:ff:ff:ff:ff
inet 172.16.3.3
/16
brd 172.16.255.255 scope global eth0
inet 172.16.3.100
/32
scope global eth0
inet 172.16.3.200
/32
scope global eth0
inet6 fe80::20c:29ff:fe65:a02f
/64
scope link
valid_lft forever preferred_lft forever
|