高并发架构——软负载据衡器Haproxy通过Keepalived实现

 Keepalived 安装配置

vim /etc/sysconfig/selinux #SELINUX=enforcing # 注释掉 #SELINUXTYPE=targeted # 注释掉 SELINUX=disabled # 增加 vim /etc/sysconfig/iptables -A INPUT -s 192.168.13.0/24 -d 224.0.0.18 -j ACCEPT -A INPUT -s 192.168.13.0/24 -p vrrp -j ACCEPT 安装依赖软件包 ### yum 安装 yum install keepalived ### 源码编译安装 yum install -y openssl-devel libnl libnl-devel libnfnetlink-devel wget http://www.keepalived.org/software/keepalived-1.2.13.tar.gz tar -zvxf keepalived-1.2.13.tar.gz cd keepalived-1.2.13 ./configure –prefix=/usr/local/keepalived make && make install cp /root/keepalived-1.2.13/keepalived/etc/init.d/keepalived.init /etc/rc.d/init.d/keepalived cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ mkdir /etc/keepalived/ cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/ cp /usr/local/keepalived/sbin/keepalived /usr/sbin/ echo “/etc/init.d/keepalived start” >> /etc/rc.local chmod +x /etc/rc.d/init.d/keepalived chkconfig keepalived on service keepalived start service keepalived stop service keepalived restart 二、配置 ! Configuration File for keepalived global_defs { notification_email { acassen@firewall.loc failover@firewall.loc sysadmin@firewall.loc } notification_email_from Alexandre.Cassen@firewall.loc smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id LVS_DEVEL } vrrp_script chk_haproxy { script “killall -0 haproxy” interval 1 weight -10 rise 1 fall 2 } vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 51 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 1111 } track_script { chk_haproxy } virtual_ipaddress { 192.168.13.200 } notify_master “/etc/keepalived/notify.sh master” notify_backup “/etc/keepalived/notify.sh backup” notify_fault “/etc/keepalived/notify.sh fault” } ## slave ! Configuration File for keepalived global_defs { notification_email { acassen@firewall.loc failover@firewall.loc sysadmin@firewall.loc } notification_email_from Alexandre.Cassen@firewall.loc smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id LVS_DEVEL } vrrp_script chk_haproxy { script “killall -0 haproxy” interval 1 weight -5 rise 1 fall 2 } vrrp_instance VI_1 { state BACKUP interface eth0 virtual_router_id 51 priority 99 advert_int 1 authentication { auth_type PASS auth_pass 1111 } track_script { chk_haproxy } virtual_ipaddress { 192.168.13.200 } notify_master “/etc/keepalived/notify.sh master” notify_backup “/etc/keepalived/notify.sh backup” notify_fault “/etc/keepalived/notify.sh fault” } #!/bin/bash A=`ps -C haproxy –no-header | wc -l` if [ $A -eq 0 ];then /usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/haproxy-dynamic.cfg sleep 3 if [ `ps -C haproxy –no-header | wc -l ` -eq 0 ];then killall keepalived fi fi #!/bin/bash # contact=’carlosxiaocc@163.com’ notify() { mailsubject=”$(hostname) to be $1, vip floating” mailbody=”$(date +’%F %T’): vrrp transition, $(hostname) changed to be $1″ echo “$mailbody” | mail -s “$mailsubject” $contact } case $1 in master) notify master ;; backup) notify backup ;; fault) notify fault ;; *) echo “Usage: $(basename $0) {master|backup|fault}” exit 1 ;; esac