Mycat高可用搭建Keepalived + HAproxy

背景：
需要搭建Mycat商用环境，使用4台虚拟机操练一下，最终的目标是：

服务器情况：

机器IP	机器名	安装组件
192.168.239.144	douzi9	Mysql Master1|Mycat1
192.168.239.145	douzi10	Mysql Slave1|HAProxy Keepalived Master
192.168.239.146	douzi11	Mysql Master2|Mycat2
192.168.239.147	douzi12	Mysql Slave2|HAProxy Keepalived Savle

正文：

Mycat集群搭建

1.复制douzi9上的mycat到douzi11的/usr/local/下

2.下载HAProxy：

OpenPKG Project: Download

Index of /repo/pkgs/haproxy

3.安装HAProxy：

• 将下载下来的Haproxy放到Linux中， 解压文件

tar -zxvf haproxy-2.1.3.tar.gz -C /usr/local/src/

• yum安装GCC

yum install gcc-c++

• 编译与安装Haproxy

cd /usr/local/src/haproxy-2.1.3 查看linux内核: uname -r 进入Haproxy文件夹，编译执行命令：make TARGET=linux310 (linux内核版本) 安装特定位置：make install PREFIX=/usr/local/haproxy

• 进入创建的文件夹cd /usr/local/haproxy，修改配置

           创建一个文件夹，mkdir conf config文件夹

           进入该文件夹，在文件夹中，创建 一个文件执行命令： touch haproxy.cnf

• 编辑配置文件添加如下信息

global     log 127.0.0.1 local0     #log 127.0.0.1 local1 notice     #log loghost   local0 info     maxconn 4096     chroot /usr/local/haproxy     pidfile /usr/local/haproxy/conf/haproxy.pid     uid 99     gid 99     daemon #后台方式运行     #debug     #quiet defaults     log  global     mode tcp    #默认的模式mode { tcp|http|health }，tcp是4层，http是7层，health只会返回OK     option abortonclose #当服务器负载很高的时候，自动结束掉当前队列处理比较久的链接     option redispatch  #当serverId对应的服务器挂掉后，强制定向到其他健康的服务器     retries 3       #三次连接失败就认为是服务器不可用，也可以通过后面设置     maxconn 2000          #默认的最大连接数     timeout connect 5000  #连接超时     timeout client  50000 #客户端超时     timeout server  50000 #服务器超时     #timeout check  2000  #=心跳检测超时 listen proxy_status       #这里是配置负载均衡，proxy_status是名字，可以任意     bind :48066       #这里是监听的IP地址和端口，端口号可以在0-65535之间，要避免端口冲突                   mode tcp          #连接的协议，这里是tcp协议                   balance roundrobin                   server mycat_1 192.168.239.144:8066 check inter 10s                   server mycat_1 192.168.239.146:8066 check inter 10s                   frontend admin_stats   #管理端设置     bind :7777      #注意bind后的空格                   mode http                   stats enable                   option httplog                   maxconn 10                   stats refresh 30s                   stats uri /admin                   stats auth admin:123456                   stats hide-version                   stats admin if TRUE

• 启动对应的mycat服务后，启动haproxy

/usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/haproxy.cnf 查看是否启动 ps -ef | grep haproxy 浏览器访问 http://douzi10:7777/admin 命令访问 使用48066端口访问mycat mysql -uroot -p123456 -h douzi9 -P 48066 也可以使用客户端连接

4.下载Keepalived

• 官网下载源码包

wget https://www.keepalived.org/software/keepalived-2.0.17.tar.gz

• 安装keepalived所需要的 一些依赖包

yum install openssl-devel popt-devel libnl-devel kernel-devel gcc -y

• 解压源码，安装到/usr/local/keepalived

tar -zxvf keepalived-2.0.17.tar.gz -C /usr/local/src/ cd /usr/local/src/keepalived-2.0.17/ ./configure -prefix=/usr/local/keepalived make && make install

• 运行前配置

cp /usr/local/src/keepalived-2.0.17/keepalived/etc/init.d/keepalived /etc/init.d mkdir /etc/keepalived cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/ cp /usr/local/src/keepalived-2.0.17/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ cp /usr/local/keepalived/sbin/keepalived /usr/sbin/

• 修改douzi10服务器Master配置文件

vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived   global_defs {    notification_email {        admin@bluemobi.cn    }    notification_email_from  lvs_admin@bluemobi.cn    smtp_server 127.0.0.1    smtp_connect_timeout 30    router_id LVS_DEVEL    vrrp_skip_check_adv_addr    vrrp_garp_interval 0    vrrp_gna_interval 0 } vrrp_instance VI_1 {     # 主机配MASTER,备机配置BACKUP     state MASTER     interface eno16777736     virtual_router_id 51 # 数值越大优先级越高     priority 100     advert_int 1    authentication {         auth_type PASS         auth_pass 123456     }     virtual_ipaddress { # 虚拟IP         192.168.239.200     } } # 虚拟机不需要配置下面部分，如果客户端连接不上，可以不配置下面部分 virtual_server 192.168.239.200 48066 {             delay_loop 6             lb_algo rr             lb_kind NAT             persistence_timeout 50             protocol TCP             real_server 192.168.239.145 48066 {                        weight 1                        TCP_CHECK {                                   connect_timeout 3                                   retry 3                                   delay_before_retry 3                        }             }                         real_server 192.168.239.147 48066 {                        weight 1                        TCP_CHECK {                                   connect_timeout 3                                   retry 3                                   delay_before_retry 3                        }             } }

• 启动keepalived并验证

systemctl start keepalived systemctl status keepalived

• 修改douzi12 服务器BackUP配置文件

vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived   global_defs {    notification_email {       admin@bluemobi.cn    }    notification_email_from  lvs_admin@bluemobi.cn    smtp_server 127.0.0.1    smtp_connect_timeout 30    router_id LVS_DEVEL    vrrp_skip_check_adv_addr    vrrp_garp_interval 0    vrrp_gna_interval 0 } vrrp_instance VI_1 {     # 主机配MASTER,备机配置BACKUP     state BACKUP     interface eno16777736     virtual_router_id 51 # 数值越大优先级越高     priority 90     advert_int 1     authentication {         auth_type PASS         auth_pass 123456     }     virtual_ipaddress { # 虚拟IP         192.168.239.200     } } # 虚拟机不需要配置下面部分，如果客户端连接不上，可以不配置下面部分 virtual_server 192.168.239.200 48066 {             delay_loop 6             lb_algo rr             lb_kind NAT             persistence_timeout 50             protocol TCP             real_server 192.168.239.145 48066 {                        weight 1                        TCP_CHECK {                                   connect_timeout 3                                   retry 3                                   delay_before_retry 3                        }             }                         real_server 192.168.239.147 48066 {                        weight 1                        TCP_CHECK {                                   connect_timeout 3                                   retry 3                                   delay_before_retry 3                        }             } }

• 验证keepalived连接

mysql -uroot -p123456 -h 192.168.239.200 -P 48066

• 客户端连接

• 设置keepalived服务开机启动

# chkconfig keepalived on