memcached主备安装

prollerweg

一、软件下载
wget http://memcached.googlecode.com/files/memcached-1.4.13.tar.gz

wget http://memagent.googlecode.com/files/magent-0.6.tar.gz

wget http://monkey.org/~provos/libevent-1.4.9-stable.tar.gz

二、安装libevent-1.4.9-stable.tar.gz

tar zxvf libevent-2.0.13-stable.tar.gz cd libevent-2.0.13-stable ./configure --with-libevent=/usr make make install

三、安装memcached

tar zxvf memcached-1.4.13.tar.gz cd memcached-1.4.13 ./configure --with-libevent=/usr make make install

四、安装magent

tar zxvf magent-0.6.tar.gz make cp magent /usr/bin/

报错1： gcc -Wall -g -O2 -I/usr/local/include -m64 -c -o magent.o magent.c magent.c: In function 'writev_list': magent.c:729: error: 'SSIZE_MAX' undeclared (first use in this function) magent.c:729: error: (Each undeclared identifier is reported only once magent.c:729: error: for each function it appears in.) make: *** [magent.o] Error 1 解决办法： [root@centos6 memcached]# vi ketama.h #在开头加入 #ifndef SSIZE_MAX #define SSIZE_MAX      32767 #endif 报错2： gcc -Wall -g -O2 -I/usr/local/include -m64 -c -o magent.o magent.c gcc -Wall -g -O2 -I/usr/local/include -m64 -c -o ketama.o ketama.c gcc -Wall -g -O2 -I/usr/local/include -m64 -o magent magent.o ketama.o /usr/lib64/libevent.a /usr/lib64/libm.a gcc: /usr/lib64/libevent.a: No such file or directory gcc: /usr/lib64/libm.a: No such file or directory 解决办法： [root@centos6 memcached]# ln -s /usr/lib/libevent*  /usr/lib64/ [root@centos6 memcached]# make 报错3： gcc -Wall -g -O2 -I/usr/local/include -m64 -o magent magent.o ketama.o /usr/lib64/libevent.a /usr/lib64/libm.a gcc: /usr/lib64/libm.a: No such file or directory make: *** [magent] Error 1 解决办法： yum install glibc glibc-devel 如果是64bit的系统则不会在/usr/lib64/libm.a 生成，如果是32bit即会有。 [root@centos6 memcached]# cp /usr/lib64/libm.so /usr/lib64/libm.a 报错4： gcc -Wall -g -O2 -I/usr/local/include -m64 -o magent magent.o ketama.o /usr/lib64/libevent.a /usr/lib64/libm.a /usr/lib64/libevent.a(event.o): In function `detect_monotonic': event.c:(.text+0xc79): undefined reference to `clock_gettime' /usr/lib64/libevent.a(event.o): In function `gettime': event.c:(.text+0xd60): undefined reference to `clock_gettime' collect2: ld returned 1 exit status make: *** [magent] Error 1 解决办法： [root@centos6 memcached]# vi Makefile CFLAGS = -Wall -g -O2 -I/usr/local/include $(M64) 改为：    CFLAGS = -lrt -Wall -g -O2 -I/usr/local/include $(M64)

五、启动服务
5.1memcached启动

memcached启动参数描述： -d ：启动一个守护进程， -m：分配给Memcache使用的内存数量，单位是MB，默认是64MB， -u ：运行Memcache的用户 -l  ：监听的服务器IP地址 -p ：设置Memcache监听的端口，默认是11211    注：-p（p为小写） -c ：设置最大并发连接数，默认是1024 -P ：设置保存Memcache的pid文件   注：-P（P为大写） 如果要结束Memcache进程，执行：kill cat pid文件路径

memcached -m 10 -u root -d -l 0.0.0.0 -p 11211 -vv >> /tmp/memcached.log 2>&1 netstat -antp

5.2magent启动

magent -u root -n 51200 -l 192.168.35.56 -p 12000 -s 127.0.0.1:11211 -b 127.0.0.1:11212

分别在127.0.0.1机器的11211，11212端口启动2个Memcached进程，在12000端口开启magent代理程序；
11211主Memcached，11212为备份Memcached；
六、验证测试

[root@demoServer ~]# telnet 192.168.35.56 12000 Trying 192.168.35.56... Connected to 192.168.35.56. Escape character is '^]'. stats memcached agent v0.6 matrix 1 -> 127.0.0.1:11211, pool size 0 END

# telnet 192.168.1.219 12000 Trying 1192.168.1.219... Connected to 192.168.1。219. Escape character is '^]'. stats memcached agent v0.4 matrix 1 -> 192.168.1.219:11211, pool size 0 matrix 2 -> 192.168.1.219:11212, pool size 0 END set key1 0 0 5 reesun STORED set key2 0 0 6 reesun1 STORED quit Connection closed by foreign host. # telnet 192.168.1.219 11211 Trying 192.168.1.219... Connected to 192.168.1.219. Escape character is '^]'. get key1 END get key2 VALUE key2 0 6 reesun1 END quit Connection closed by foreign host. # telnet 192.168.1.219 11212 Trying 192.168.1.219... Connected to 1192.168.1.219. Escape character is '^]'. get key1 VALUE key1 0 5 reesun END get key2 END quit Connection closed by foreign host. # telnet 192.168.1.219 11213 Trying 192.168.1.219... Connected to 1192.168.1.219. Escape character is '^]'. get key1 VALUE key1 0 5 reesun END get key2 VALUE key2 0 6 reesun1 END quit Connection closed by foreign host