memcache集群

原创

cmk577 2018-01-23 20:48:34 博主文章分类：mysql ©著作权

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四台电脑 memcache：192.168.1.201 192.168.1.202 magent： 192.168.1.100 192.168.1.101 实验： 1、安装libevent软件(四台) [root@localhost ~]# tar -zxvf libevent-2.0.21-stable.tar.gz -C /usr/src/ [root@localhost ~]# cd /usr/src/libevent-2.0.21-stabl [root@localhost libevent-2.0.21-stable]# ./configure --prefix=/usr/ [root@localhost libevent-2.0.21-stable]# make && make install 2、安装memcached软件(Memcached服务器 2台) [root@localhost ~]# tar -zxvf memcached-1.4.31.tar.gz -C /usr/src/ [root@localhost ~]# cd /usr/src/memcached-1.4.31/ [root@localhost memcached-1.4.31]# ./configure --enable-memcache --with-libevent=/usr/ [root@localhost memcached-1.4.31]# make && make install 主缓存： [root@localhost ~]# memcached -d -m 1024 -u root -l 192.168.1.201 -p 11211 备缓存： [root@localhost ~]# memcached -d -m 1024 -u root -l 192.168.1.202 -p 11211 [root@localhost ~]# netstat -anpt | grep memcached 3、安装magent 软件(Magent 服务器 2台) [root@localhost ~]# mkdir /usr/magent [root@localhost ~]# tar -zxvf magent-0.6.tar.gz -C /usr/magent/ [root@localhost ~]# cd /usr/magent/ [root@localhost magent]# vim ketama.h 添加(头部添加)： #ifndef SSIZE_MAX #define SSIZE_MAX 32767 #endif [root@localhost magent]# ln -s /usr/lib64/libm.so /usr/lib64/libm.a [root@localhost magent]# ln -s /usr/lib64/libevent-1.4.so.2 /usr/lib64/libevent.a 无法make的时候需要安装libevent-1.4.so.2 [root@localhost magent]# /sbin/ldconfig [root@localhost magent]# sed -i "s#LIBS = -levent#LIBS = -levent -lm#g" Makefile [root@localhost magent]# make [root@localhost magent]# cp magent /usr/bin/ 主缓存和备缓存一样的启动命令(-l 是漂移IP 还没有搭建Keepalived服务暂时不要启动Magent服务) [root@localhost ~]# magent -u root -n 51200 -l 192.168.1.10 -p 12000 -s 192.168.1.201:11211 -b 192.168.1.202:11211 [root@localhost ~]# magent -u root -n 51200 -l 192.168.1.10 -p 12000 -s 192.168.1.201:11211 -b 192.168.1.202:11211 -u：用户 -n：最大连接数 -l：magent 对外监听IP 地址 -p：magent 对外监听端口 -s：magent 主缓存IP 地址和端口 -b：magent 备缓存IP 地址和端口 [root@localhost ~]# ps -elf | grep magent 4、安装keepalived 软件(Magent 服务器 2台) [root@localhost ~]# yum –y install openssl* [root@localhost ~]# tar -zxvf keepalived-1.2.13.tar.gz -C /usr/src/ [root@localhost ~]# cd /usr/src/keepalived-1.2.13/ [root@localhost keepalived-1.2.13]# ./configure --prefix=/ --with-kernel-dir=/usr/src/kernels/2.6.32-431.el6.x86_64 [root@localhost keepalived-1.2.13]# make && make install 配置主缓存服务器 [root@localhost ~]# vim /etc/keepalived/keepalived.conf 修改： global_defs { router_id LVS_DEVEL_R1 } vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 51 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.1.10 } } [root@localhost ~]# service keepalived restart [root@localhost ~]# ip add show dev eth0 配置备缓存服务器 [root@localhost ~]# vim /etc/keepalived/keepalived.conf 修改： global_defs { router_id LVS_DEVEL_R2 } vrrp_instance VI_1 { state BACKUP priority 99 ...... virtual_ipaddress { 192.168.1.10 } ---其他参数与主缓存服务器保持一致---- } [root@localhost ~]# service keepalived restart [root@localhost ~]# ip add show dev eth0 验证：客户端ping 192.168.1.10 查看VIP的变化情况。 5、验证： 1）用主缓存节点连接上主缓存的1200端口插入数据 [root@localhost ~]# telnet 192.168.1.10 12000 Trying 192.168.1.10... Connected to 192.168.1.10. Escape character is '^]'. set key 33 0 5 ggggg STORED quit Connection closed by foreign host. 2）查看插入的数据 [root@localhost ~]# telnet 192.168.1.10 12000 Trying 192.168.1.10... Connected to 192.168.1.10. Escape character is '^]'. get key VALUE key 33 5 ggggg END quit Connection closed by foreign host. 3）连接主缓存节点的11211端口进行查看 [root@localhost ~]# telnet 192.168.1.201 11211 Trying 192.168.1.100... Connected to 192.168.1.100. Escape character is '^]'. get key VALUE key 33 5 ggggg END quit Connection closed by foreign host. 4）连接主缓存节点的11211端口进行查看 [root@localhost ~]# telnet 192.168.1.202 11211 Trying 192.168.1.200... Connected to 192.168.1.200. Escape character is '^]'. get key VALUE key 33 5 ggggg END quit Connection closed by foreign host. 说明主缓存节点和备缓存节点都有数据。宕掉主缓存节点。 1）停止memcached进程（或者断开主缓存节点的网卡）， 2）客户端查看 [root@localhost ~]# telnet 192.168.1.10 12000 Trying 192.168.1.10... Connected to 192.168.1.10. Escape character is '^]'. get key VALUE key 33 5 ggggg END

总结： memcache的优点：可以做多主或者多从 memcache的缺点：当主缓存节点当掉又恢复，之前的缓存数据会丢失。