标签：检查 div glob bak prefix usr linux ini 开发包
Keepalived是专门针对LVS设计的一款强大的辅助工具，主要用来提供故障切换(Failover)和健康检查(HeathChecking)功能——判断LVS负载调度器、节点服务器的可用性，及时隔离并替换为新的服务器，当故障主机恢复后将其重新加入群集。
Keepalived的官方网站位于http：//www.keepalived.org/
Keepalived的热备方式
Keepalived采用VRRP(Virtual Router Redundancy Protocol，虚拟路由冗余协议)热备份协议，以软件的方式实现Linux服务器的多机热备功能。VRRP是针对路由器的一种备份解决方案——由多台路由器组成一个热备组，通过共用的虚拟ip地址对外提供服务；每个热备组内同一时刻只有一台主路由器提供服务，其他路由器处于冗余状态，若当前在线的路由器失效，则其他路由器会自动接替(优先级决定接替顺序)虚拟IP地址，以继续提供服务。热备组内的路由器之间进行转移，所以也称为漂移IP地址。使用Keepalived时，漂移地址的实现不需要手动建立虚接口配置文件(如eth0:0)而是由Keepalived根据配置文件自动管理。
(一主多从之间的优先级不能相同，否则会产生‘‘脑裂"或"裂脑")
1.安装支持软件
在编译安装Keepallved之前，必须先安装内核开发包kernel-devel，以及openss1一devel、popt-devel等支持库。除此之外，在LVS群集环境中应用时，也需要用到rpvsadm管理工具。
[root@Keepalived ~]# yum -y install kernel-devel openssl-devel popt-devel [root@Keepalived ~]# yum -y install ipvsadm
2.编译安装keepalived
[root@Keepalived ~]# tar zxvf keepalived-1.2.13.tar.gz -C /usr/src/ [root@Keepalived ~]# cd /usr/src/keepalived-1.2.13/ [root@Keepalived keepalived-1.2.13]# ./configure --prefix=/ --with-kernel-dir=/usr/src/kernels/2.6.32-431.el6.x86_64/ [root@Keepalived keepalived-1.2.13]# make [root@Keepalived keepalived-1.2.13]# make install
只有使用LVS时才需要参数 --with-kernel-dir
3.使用Keepalived服务
[root@Keepalived ~]# ls -1 /etc/init.d/keepalived -rwxr-xr-x 1 root root 1288 11月 8 16:23 /etc/init.d/keepalived [root@Keepalived ~]# chkconfig --add keepalived [root@Keepalived ~]# chkconfig keepalived on
不需要配置LVS，因为keepalived去调用LVS内核模块
1.配置IP
略，Web服务器和Client客户端需要指定网关，都为VIP地址
2.配置Keepalived服务器(主-从)
1)调整响应参数
[root@Keepalived ~]# vim /etc/sysctl.conf 修改： net.ipv4.ip_forward = 1 添加： net.ipv4.conf.all.send_redirects = 0 net.ipv4.conf.default.send_redirects = 0 net.ipv4.conf.eth0.send_redirects = 0 [root@Keepalived ~]# sysctl -p
2)安装Keepalived软件与ipvsadm管理工具
[root@Keepalived ~]# yum -y install ipvsadm [root@Keepalived ~]# yum -y install kernel-devel openssl-devel popt-devel [root@Keepalived ~]# tar zxvf keepalived-1.2.13.tar.gz -C /usr/src/ [root@Keepalived ~]# cd /usr/src/keepalived-1.2.13/ [root@Keepalived keepalived-1.2.13]# ./configure --prefix=/ --with-kernel-dir=/usr/src/kernels/2.6.32-431.el6.x86_64/ [root@Keepalived keepalived-1.2.13]# make [root@Keepalived keepalived-1.2.13]# make install [root@Keepalived ~]# chkconfig --add keepalived [root@Keepalived ~]# chkconfig keepalived on
3)配置Keepalived
(1)全局配置、热备配置
[root@Keepalived ~]# cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak [root@Keepalived ~]# vim /etc/keepalived/keepalived.conf
global_defs { router_id LVS_MSATER_1 //主调度器的名称 } vrrp_instance VI_1 { //第一个实例的配置(VIP:1.1.1.1) state MASTER //主调度器的热备状态 interface eth0 //本网段提供服务的网卡设备名称 virtual_router_id 51 priority 100 //主调度器的优先级 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 1.1.1.1 //VIP地址配置 } } vrrp_instance VI_1 { //第二个实例的配置(VIP:192.168.10.1) state MASTER interface eth1 virtual_router_id 51 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.10.1 } }
! Configuration File for keepalived global_defs { router_id LVS_Savle_1 //修改 } vrrp_instance VI_1 { state BACKUP //修改 interface eth0 virtual_router_id 51 priority 90 //修改 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 1.1.1.1 } } vrrp_instance VI_1 { state BACKUP //修改 interface eth2 virtual_router_id 51 priority 90 //修改 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.10.1 } }
(2)Web服务器池配置
virtual_server 1.1.1.1 80 { delay_loop 15 lb_algo rr lb_kind NAT protocol TCP real_server 192.168.10.100 80 { weight 1 TCP_CHECK { connect_port 80 connect_timeout 3 nb_get_retry 3 delay_before_retry 4 } } real_server 192.168.10.200 80 { weight 1 TCP_CHECK { connect_port 80 connect_timeout 3 nb_get_retry 3 delay_before_retry 4 } } }
使用ip工具可以查看漂移IP(主)
[root@Keepalived ~]# ip a ...... 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:85:d4:5c brd ff:ff:ff:ff:ff:ff inet 1.1.1.10/8 brd 1.255.255.255 scope global eth0 inet 1.1.1.1/32 scope global eth0 inet6 fe80::20c:29ff:fe85:d45c/64 scope link valid_lft forever preferred_lft forever3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:85:d4:70 brd ff:ff:ff:ff:ff:ff inet 192.168.10.10/24 brd 192.168.10.255 scope global eth2 inet 192.168.10.1/32 scope global eth2 inet6 fe80::20c:29ff:fe85:d470/64 scope link valid_lft forever preferred_lft forever
5）配置Web节点服务器(各Web服务器配置相同)
安装httpd服务，创建测试页面，并启动httpd服务
[root@Web1 ~]#echo "LVS test 1" > /var/www/html/index.html //第一个web服务器内容 [root@Web2 ~]#echo "LVS test 2" > /var/www/html/index.html //第二个web服务器内容
1.配置IP地址
略
2.配置Keeplives服务器(主--从)
1)调整响应参数
[root@Keepalived ~]# vim /etc/sysctl.conf 添加： net.ipv4.conf.all.send_redirects = 0 net.ipv4.conf.default.send_redirects = 0 net.ipv4.conf.eth0.send_redirects = 0 [root@Keepalived ~]# sysctl -p
2)安装Keepalived软件与ipvsadm管理工具
[root@Keepalived ~]# yum -y install ipvsadm
[root@Keepalived ~]# yum -y install kernel-devel openssl-devel popt-devel
[root@Keepalived ~]# tar zxvf keepalived-1.2.13.tar.gz -C /usr/src/
[root@Keepalived ~]# cd /usr/src/keepalived-1.2.13/
[root@Keepalived keepalived-1.2.13]# ./configure --prefix=/ --with-kernel-dir=/usr/src/kernels/2.6.32-431.el6.x86_64/
[root@Keepalived keepalived-1.2.13]# make
[root@Keepalived keepalived-1.2.13]# make install
[root@Keepalived ~]# chkconfig --add keepalived
[root@Keepalived ~]# chkconfig keepalived on
3)配置Keepalived
标签：检查 div glob bak prefix usr linux ini 开发包
原文地址：http://www.cnblogs.com/zhichaoma/p/7620443.html
