corosync+lvs+ldirectord

1.环境：四台oel6.3。两台用作httpd节点，两台用作lvs节点。lvs节点由corosync做高可用。lvs节点的ip分别为172.16.5.158(hadoopm)和172.16.5.202(test)。两个httpd节点分别为172.16.5.200和172.16.5.201,VIP为172.16.5.178

2.集群安装

wget http://download.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm

rpm -ivh epel-release-5-4.noarch.rpm

rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

wget http://download.opensuse.org/repositories/network:/ha-clustering:/Stable/CentOS_CentOS-6/x86_64/pssh-2.3.1-3.2.x86_64.rpm

wget http://download.opensuse.org/repositories/network:/ha-clustering:/Stable/CentOS_CentOS-6/x86_64/ crmsh-1.2.6-5.1.x86_64.rpm

yum localinstall --nogpgcheck -y pssh-2.3.1-3.2.x86_64.rpm crmsh-1.2.6-5.1.x86_64.rpm

wget -O /etc/yum.repos.d/pacemaker.repo http://clusterlabs.org/rpm/epel-5/clusterlabs.repo

yum install -y corosync pacemaker ldirectord

3.lvs节点配置

1）确保两台lvs节点双机互信，且/etc/hosts文件保持一致，时间同步。

2）编辑ldirectord.cf配置文件

cp /usr/share/doc/ldirectord-1.0.4/ldirectord.cf /etc/ha.d/

vim ldirectord.cf

# Global Directives checktimeout=5 checkinterval=3 #fallback=127.0.0.1:80 autoreload=yes logfile="/var/log/ldirectord.log" quiescent=no # Sample for an http virtual service virtual=172.16.5.187:80        real=172.16.5.201:80 gate        real=172.16.5.200:80 gate #       fallback=127.0.0.1:80 gate        service=http        scheduler=rr        #persistent=600        netmask=255.255.255.0        protocol=tcp        checktype=negotiate        checkport=80        request="test.html"        receive="Test Page"

确保两台节点ldirectord.cf配置一致

3）httpd节点的配置

yum install -y httpd

echo "Test page" > /var/www/html/test.html

echo "test" > /var/www/html/index.html

service httpd start

iptables -t nat -A PREROUTING -d 172.16.5.187 -j REDIRECT

3）配置corosync资源

crm configure property stonish-enabled=false            #关闭stonish

crm configure property no-quorum-policy=ignore     #忽略法定票数

crm configure rsc_defaults reource-stickiness=100      #配置资源粘性，更倾向于留在当前节点

crm configure primitive webip ocf:heartbeat:IPaddr params ip=172.16.5.187 nic=eth0 cidr_netmask=24   #定义虚拟IP资源

crm configure primitive ldirectord lsb:ldirectord op start timeout=15s op stop timeout=15s   #定义ldirectord资源

crm configure colocation webip_with_ldirectord inf: webip ldirectord     #定义排列约束，两个资源必须在同一台服务器上

crm configure order ldirectord_after_webip inf: webip ldirectord    #定义顺序约束，先启动虚拟IP，再启动ldirectord

crm configure location on_test webip 200: test.cmmobi-wh.com    #定义位置约束，默认在test.cmmobi-wh.com这台服务器上启动

关于corosync的配置，请参考本人博客《corosync+pacemaker》：http://breezey.blog.51cto.com/2400275/133939

关于ldirectord的配置说明，请参考本人博客《ldirectord配置文件详解》：http://breezey.blog.51cto.com/2400275/1339455