keepalived+LVS高可用的负载均衡

╰+哭是因爲堅強的太久メ 2022-01-13 15:27 223阅读 0赞

1.安装keepalived（在两台调度服务器上安装）  
vim /etc/yum.repo.d/rhel.repo  
\[local-cdrom\]  
name=local from cdrom  
baseurl=file:///mnt/  
enable=1  
gpgcheck=0

yum -y install kernel-devel openssl-devel popt-devel  
rpm -ivh /mnt/Packgets/ipvsadm-1.25-9.el6.i686.rpm  
tar zxvf keepalived-1.2.2.tar.gz -C /usr/src/  
cd /usr/src/keepalived-1.2.2/  
./configure --prefix=/ --with-kernel-dir=/usr/src/kernels/2.6.32-131.0.15.el6.i686  
make &&make install  
chkconfig --add keepalived  
chkconfig keepalived on  
2.配置调度器（主：192.168.13.95，备：192.168.13.96，漂移ip：192.168.13.100）web服务器池（节点1:192.168.13.41、节点2:192.168.13.47）  
1）、配置主HA调度服务器  
cd /etc/keepalived/  
cp keepalived.conf keepalived.conf.bak  
vi /etc/keepalived/keepalived.conf  
\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#全局配置\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#33  
global\_defs \{  
router\_id LVS\_HA\_R1  
\}  
\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#高可用HA的设置\#\#\#\#\#\#\#\#\#\#\#\#\#\#  
vrrp\_instance VI\_1 \{  
state MASTER  
interface eth0  
virtual\_route\_id 1  
priority 100  
advert\_int 1  
authentication \{  
auth\_type PASS  
auth\_pass 123123  
\}  
virtual\_ipaddress \{  
192.168.13.100  
\}  
\}  
\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#服务器池的配置\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#  
virtual\_server 192.168.13.100 80 \{  
delay\_loop 15  
lb\_algo rr  
lb\_kind DR  
protocol TCP  
real\_server 192.168.13.41 80 \{  
weight 1  
TCP\_CHECK \{  
connect\_port 80  
connect\_timeout 3  
nb\_get\_retry 3  
delay\_before\_retry 4  
\}  
\}  
real\_server 192.168.13.41 80 \{  
weight 1  
TCP\_CHECK \{  
connect\_port 80  
connect\_timeout 3  
nb\_get\_retry 3  
delay\_before\_retry 4  
\}  
\}  
\}

modprobe ip\_vs  
lsmod |grep ip\_vs  
echo "modprobe ip\_vs" >>/etc/rc.local  
/etc/init.d/keepalived restart  
chkconfig ipvsadm off  
ip addr show dev eth0  
2）、配置HA从调度服务器  
cd /etc/keepalived/  
cp keepalived.conf keepalived.conf.bak  
vi /etc/keepalived/keepalived.conf  
\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#全局配置\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#33  
global\_defs \{  
router\_id LVS\_HA\_R2  
\}  
\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#高可用HA的设置\#\#\#\#\#\#\#\#\#\#\#\#\#\#  
vrrp\_instance VI\_1 \{  
state SLAVE  
interface eth0  
virtual\_route\_id 1  
priority 99  
advert\_int 1  
authentication \{  
auth\_type PASS  
auth\_pass 123123  
\}  
virtual\_ipaddress \{  
192.168.13.100  
\}  
\}  
\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#服务器池的配置\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#  
virtual\_server 192.168.13.100 80 \{  
delay\_loop 15  
lb\_algo rr  
lb\_kind DR  
protocol TCP  
real\_server 192.168.13.41 80 \{  
weight 1  
TCP\_CHECK \{  
connect\_port 80  
connect\_timeout 3  
nb\_get\_retry 3  
delay\_before\_retry 4  
\}  
\}  
real\_server 192.168.13.47 80 \{  
weight 1  
TCP\_CHECK \{  
connect\_port 80  
connect\_timeout 3  
nb\_get\_retry 3  
delay\_before\_retry 4  
\}  
\}  
\}

modprobe ip\_vs  
lsmod |grep ip\_vs  
echo "modprobe ip\_vs" >>/etc/rc.local  
/etc/init.d/keepalived restart  
chkconfig ipvsadm off  
ip addr show dev eth0  
\#\#\#\#\#\#设置防火墙和selinux（此处为测试）\#\#\#\#\#\#\#\#\#  
iptables -F  
setenforce 0

3.配置Web节点服务器（DR工作模式的配置，分别在节点服务器上做如下设置）  
cd /etc/sysconfig/network-script/  
cp ifcfg-lo ifcfg-lo:0  
vi ifcfg-lo:0  
DEVICE=lo:0  
IPADDR=192.168.13.100  
NETMASK=255.255.255.255  
ONBOOT=yes

echo "route add -host 192.168.13.100 dev lo:0" >>/etc/rc.local  
route add -host 192.168.13.100 dev lo:0  
ip addr show dev lo

vi /etc/sysctl.conf  
net.ipv4.conf.all.arp\_ignore = 1  
net.ipv4.conf.all.arp\_announce = 2  
net.ipv4.conf.default.arp\_ignore = 1  
net.ipv4.conf.default.arp\_announce = 2  
net.ipv4.conf.lo.arp\_ignore = 1  
net.ipv4.conf.lo.arp\_announce = 2

sysctl -p  
yum install -y httpd  
vi /var/www/html/index.html  
test page!!!!

/etc/init.d/httpd start  
chkconfig httpd on  
iptables -F  
setenforce 0

4.测试lvs+Keepalived高可用集群  
在客户机浏览器访问192.168.13.100，调度服务器可用坏一个，节点服务器至少要有一个是好的。  
通过/var/log/message日志文件，跟踪故障切换过程。使用ipvsadm -Ln查看LVS。

转载于:https://blog.51cto.com/14380057/2408383