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0## Keepalived
RHEL6 系列 selinux and iptables disabled
主机名 | IP |
---|---|
server1 | 172.25.64.1 |
server2 | 172.25.64.2 |
server3 | 172.25.64.3 |
server4 | 172.25.64.4 |
[root@server1 ~]# vim /etc/yum.repos.d/rhel-source.repo[rhel-source]name=Red Hat Enterprise Linux $releasever - $basearch - Sourcebaseurl=http://172.25.64.250/rhel6.5enabled=1gpgcheck=0[LoadBalancer]name=LoadBalancerbaseurl=http://172.25.64.250/rhel6.5/LoadBalancerenabled=1gpgcheck=0[HighAvailability]name=HighAvailabilitybaseurl=http://172.25.64.250/rhel6.5/HighAvailabilityenabled=1gpgcheck=0
[root@server1 ~]# lskeepalived-2.0.6.tar.gz[root@server1 ~]# tar zxf keepalived-2.0.6.tar.gz [root@server1 ~]# lskeepalived-2.0.6 keepalived-2.0.6.tar.gz[root@server1 ~]# cd keepalived-2.0.6
[root@server1 keepalived-2.0.6]# yum install openssl-devel -y
[root@server1 keepalived-2.0.6]# ./configure --prefix=/usr/local/keepalived --with-init=SYSV[root@server1 keepalived-2.0.6]# make && make install
[root@server1 keepalived-2.0.6]# cd /usr/local/keepalived/etc/rc.d/init.d/[root@server1 init.d]# lskeepalived[root@server1 init.d]# chmod +x keepalived
[root@server1 init.d]# ip addr del 172.25.64.100/24 dev eth0 [root@server1 etc]# ln -s /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/[root@server1 etc]# ln -s /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/[root@server1 etc]# ln -s /usr/local/keepalived/etc/keepalived/ /etc/[root@server1 etc]# ln -s /usr/local/keepalived/sbin/keepalived /sbin
[root@server1 sbin]# cd /etc/keepalived/[root@server1 keepalived]# lskeepalived.conf samples[root@server1 keepalived]# vim keepalived.conf ! Configuration File for keepalived## 全局配置global_defs { ##全局定义块 notification_email { ##邮件通知 root@localhost } #设置邮件的发送地址 notification_email_from keepalived@localhost smtp_server 127.0.01 #设置 smtp server 地址 smtp_connect_timeout 30 #设置连接 smtp 服务器超时时间 router_id LVS_DEVEL #load balancer 的标识 ID,用于 email 警报 vrrp_skip_check_adv_addr #vrrp_strict vrrp_garp_interval 0 vrrp_gna_interval 0}## VRRPD配置vrrp_instance VI_1 { state MASTER #备机改为 BACKUP,此状态是由 priority 的值来决定的,当前priority 的值小于备机的值,那么将会失去 MASTER 状态 interface eth0 #HA 监测网络接口 virtual_router_id 51 #主、备机的 virtual_router_id 必须相同,取值 0-255 priority 100 #主机的优先级,备份机改为 50,主机优先级一定要大于备机 advert_int 1 #主备之间的通告间隔秒数 authentication { auth_type PASS #设置验证类型,主要有 PASS 和 AH 两种 auth_pass 1111 } ##指定漂移地址(VIP),即切换到MASTER时,这些IP会被添加,切换到BACKUP时,这些IP会被删除(传给ip addr命令),所以每台服务器可以不用绑定任何的虚拟地址。 virtual_ipaddress { 172.25.64.100 }}## 虚拟服务配置virtual_server 172.25.64.100 80 { #定义虚拟服务器 delay_loop 6 #定义虚拟服务器 lb_algo rr #lvs 调度算法,这里使用轮叫 lb_kind DR #LVS 是用 DR 模式 #persistence_timeout 50 #注释掉 protocol TCP #指定转发协议类型,有 tcp 和 udp 两种 real_server 172.25.64.2 80 { #配置服务节点 weight 1 ##默认为1,0为失效 TCP_CHECK{ ##TCP方式的健康检查,realserve 的状态检测设置部分,单位是秒 connect_timeout 3 #10 秒无响应超时 retry 3 #重试次数 delay_before_retry 3 #重试间隔 } } real_server 172.25.64.3 80 { weight 1 TCP_CHECK{ connect_timeout 3 retry 3 delay_before_retry 3 } }}
[root@server1 local]# cd /usr/local[root@server1 local]# scp -r keepalived root@172.25.64.4:/usr/local
[root@server4 ~]# cd /usr/local/keepalived/etc/keepalived/[root@server4 keepalived]# lskeepalived.conf samples[root@server4 keepalived]# vim keepalived.conf ! Configuration File for keepalivedglobal_defs { notification_email { root@localhost } notification_email_from keepalived@localhost smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id LVS_DEVEL vrrp_skip_check_adv_addr #vrrp_strict vrrp_garp_interval 0 vrrp_gna_interval 0}vrrp_instance VI_1 { state BACKUP ##修改地方1 interface eth0 virtual_router_id 19 priority 50 ##修改地方2 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 172.25.64.100 }}virtual_server 172.25.64.100 80 { delay_loop 6 lb_algo rr lb_kind DR #persistence_timeout 50 protocol TCP real_server 172.25.64.2 80 { TCP_CHECK { weight 1 connect_timeout 3 retry 3 delay_before_retry 3 } } real_server 172.25.64.3 80 { TCP_CHECK { weight 1 connect_timeout 3 retry 3 delay_before_retry 3 } }}
[root@server4 keepalived]# ln -s /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/[root@server4 keepalived]# ln -s /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/[root@server4 keepalived]# ln -s /usr/local/keepalived/etc/keepalived/ /etc/[root@server4 keepalived]# ln -s /usr/local/keepalived/sbin/keepalived /sbin
10.在server1和server4中都重启服务
[root@server1 init.d]# /etc/init.d/keepalived restart[root@server4 init.d]# /etc/init.d/keepalived restart
11.测试:
[root@server3 html]# /etc/init.d/httpd stop
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