keepalived搭建详解

guyuehhh

　　#################################    1.安装兼容包  ###########################
　　yum -y install openssl openssl-devel ipvsadm
　　################################  2.下载并安装popt和keepalived  ####################
　　wget http://rpm5.org/files/popt/popt-1.14.tar.gz
　　tar popt-1.14.tar.gz
　　cd popt-1.14
　　./configuration
　　make && make install
　　wget http://www.keepalived.org/software/keepalived-1.2.20.tar.gz
　　tar zxvf keepalived-1.2.20.tar.gz
　　cd keepalived-1.2.20
　　./configuration
　　make && make install
　　###############################3.redis_master keepalived配置##################
　　cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
　　cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
　　mkdir /etc/keepalived
　　cp /usr/local/sbin/keepalived /usr/sbin/
　　cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
　　chkconfig --add keepalived
　　vi /etc/keepalived/keepalived.conf #redis master配置
　　配置MASTER 配置如下：
　　Configuration File for keepalived
　　global_defs {
　　notification_email {##指定keepalived在发生事件（如切换）需要发送Email的对象，多个写多行##
　　zhengxiaofeiccc@126.com
　　}
　　notification_email_from zhengxiaofeiccc@126.com ##发送人
　　smtp_server smtp.126.com ##SMTP服务器##
　　smtp_connect_timeout 30  ##链接超时时间##
　　router_id LVS_DEVEL       ##路由标识，这里用主机名##
　　}
　　vrrp_instance VI_1 {   ##虚拟路由标识##
　　state MASTER           ##初始状态，默认，选举产生后才可以升级为Master ，这里明确定义其为Master##
　　interface eno16777736         ##选举通过那个网卡接口## 通过ifconfig查看
　　virtual_router_id 51   ##虚拟路由的ID号，一般不大于255，可选IP最后一段使用##
　　priority 100           ##初始优先级，选举过程中判断的依据，和路由的概念一样##
　　advert_int 1           ##检查间隔，默认1s##
　　authentication {       ##认证机制##
　　auth_type PASS         ##认证方式，PASS为明文##
　　auth_pass ipython      ##认证密码##
　　}
　　virtual_ipaddress {    ##虚拟地址池##
　　192.168.230.190
　　}
　　}
　　###后面的配置参数 先删删掉吧###
　　配置Backup 配置如下：
　　global_defs {
　　notification_email {##指定keepalived在发生事件（如切换）需要发送Email的对象，多个写多行##
　　zhengxiaofeiccc@126.com
　　}
　　notification_email_from zhengxiaofeiccc@126.com ##发送人
　　smtp_server smtp.126.com ##SMTP服务器##
　　smtp_connect_timeout 30  ##链接超时时间##
　　router_id LVS_DEVEL       ##路由标识，这里用主机名##
　　}
　　vrrp_instance VI_1 {
　　state BACKUP
　　interface eno16777736
　　virtual_router_id 51
　　priority 50
　　advert_int 1
　　authentication {
　　auth_type PASS
　　auth_pass ipython
　　}
　　virtual_ipaddress {
　　192.168.230.190
　　}
　　}
　　###其他配置：####
　　nopreempt 设置为不抢占，这个配置只能设置在state为BACKUP的节点上，并且这个机器的优先级必须比另一台高
　　preempt_delay 抢占延迟，默认5分钟
　　debug debug级别
　　notify_master 切换到Master时执行的脚本
　　##start##
　　service keepalived start
　　Starting keepalived:   [  OK  ]
　　###观察其日志文件###
　　tail -f /var/log/messages
　　Aug  3 00:02:12 Nginx-one Keepalived[8177]: Starting Keepalived v1.2.13 (08/03,2014)
　　Aug  3 00:02:12 Nginx-one Keepalived[8178]: Starting Healthcheck child process, pid=8180
　　Aug  3 00:02:12 Nginx-one Keepalived[8178]: Starting VRRP child process, pid=8181
　　####当前的IP地址####
　　Aug  3 00:02:13 Nginx-one Keepalived_vrrp[8181]: Netlink reflector reports IP 192.168.230.128 added
　　Aug  3 00:02:13 Nginx-one Keepalived_vrrp[8181]: Netlink reflector reports IP fe80::20c:29ff:fecb:90a2 added
　　Aug  3 00:02:13 Nginx-one Keepalived_vrrp[8181]: Registering Kernel netlink reflector
　　Aug  3 00:02:13 Nginx-one Keepalived_vrrp[8181]: Registering Kernel netlink command channel
　　Aug  3 00:02:13 Nginx-one Keepalived_healthcheckers[8180]: Netlink reflector reports IP 1.1.1.10 added
　　Aug  3 00:02:13 Nginx-one Keepalived_healthcheckers[8180]: Netlink reflector reports IP fe80::20c:29ff:fecb:90a2 added
　　Aug  3 00:02:13 Nginx-one Keepalived_healthcheckers[8180]: Registering Kernel netlink reflector
　　Aug  3 00:02:13 Nginx-one Keepalived_vrrp[8181]: Registering gratuitous ARP shared channel
　　Aug  3 00:02:13 Nginx-one Keepalived_healthcheckers[8180]: Registering Kernel netlink command channel
　　Aug  3 00:02:13 Nginx-one Keepalived_vrrp[8181]: Opening file '/etc/keepalived/keepalived.conf'.
　　Aug  3 00:02:13 Nginx-one Keepalived_vrrp[8181]: Configuration is using : 62834 Bytes
　　Aug  3 00:02:13 Nginx-one Keepalived_vrrp[8181]: Using LinkWatch kernel netlink reflector...
　　Aug  3 00:02:13 Nginx-one Keepalived_vrrp[8181]: VRRP sockpool: [ifindex(2), proto(112), unicast(0), fd(10,11)]
　　###打开并加载配置文件####
　　Aug  3 00:02:13 Nginx-one Keepalived_healthcheckers[8180]: Opening file '/etc/keepalived/keepalived.conf'.
　　Aug  3 00:02:13 Nginx-one Keepalived_healthcheckers[8180]: Configuration is using : 7377 Bytes
　　Aug  3 00:02:13 Nginx-one Keepalived_healthcheckers[8180]: Using LinkWatch kernel netlink reflector...
　　####切换为Master 状态####
　　Aug  3 00:02:14 Nginx-one Keepalived_vrrp[8181]: VRRP_Instance(VI_1) Transition to MASTER STATE
　　Aug  3 00:02:15 Nginx-one Keepalived_vrrp[8181]: VRRP_Instance(VI_1) Entering MASTER STATE
　　Aug  3 00:02:15 Nginx-one Keepalived_vrrp[8181]: VRRP_Instance(VI_1) setting protocol VIPs.
　　####在接口上添加VIP###
　　Aug  3 00:02:15 Nginx-one Keepalived_vrrp[8181]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth1 for 192.168.230.190
　　Aug  3 00:02:15 Nginx-one Keepalived_healthcheckers[8180]: Netlink reflector reports IP 1.1.1.100 added
　　Aug  3 00:02:20 Nginx-one Keepalived_vrrp[8181]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth1 for 192.168.230.190
　　###查看是否添加VIP###
　　ip a show|awk '/inet\ /'
　　inet 127.0.0.1/8 scope host lo
　　inet 1.1.1.10/8 brd 1.255.255.255 scope global eth1
　　inet 1.1.1.100/32 scope global eth1
　　停止MASTER，查看BACKUP的状态转移
　　service keepalived stop
　　Stopping keepalived:                                       [  OK  ]
　　####和路由协议一样，当MASTER上线被检测到会抢占VIP，可以想象的到，Keepalived也支持非抢占模式，只有BACKUP在变成MASTER后宕机了，才会转移VIP，说起来怎么这么绕口####
　　######################4.启动keepalived，并查看###########################################
　　service keepalived start
　　[root@redis_master ~]# ip a|grep inet
　　inet 127.0.0.1/8 scope host lo
　　inet6 ::1/128 scope host
　　inet 192.168.230.128/24 brd 192.168.240.255 scope global eth0
　　inet 192.168.230.190/32 scope global eth0
　　inet6 fe80::250:56ff:fe98:6a56/64 scope link