Memcached和Magent简介及安装
[*] memcached的安装
[*] 安装libevent
# wget https://cloud.github.com/downloads/libevent/libevent/libevent-2.0.19-stable.tar.gz
# tar zxvf libevent-2.0.19-stable.tar.gz
# cd libevent-2.0.19-stable
# ./configure --prefix=/usr/
# make && make install 2.安装memcached
# wget http://www.memcached.org/files/memcached-1.4.22.tar.gz
# tar zxvf memcached-1.4.22.tar.gz
# ./configure --prefix=/usr/local/memcached --with-libevent=/usr/
# make && make install
[*] magent的安装
magent是一款开源的Memcached代理服务器软件，其项目网址为：
# tar zxvf magent-0.6.tar.gz
# mkdir /usr/local/magent
# tar zxvf magent-0.6.tar.gz
ketama.c
ketama.h
magent.c
Makefile
# make
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: *** Error 1
解决方法:
# vim ketama.h
#ifndef SSIZE_MAX
#define SSIZE_MAX 32767
#endif
#ifndef _KETAMA_H
#define _KETAMA_H
struct dot {
unsigned int point;
int srvid;
};
struct ketama {
unsigned int numpoints;
struct dot *dot;
int count;
char **name;
int *weight;
int totalweight;
};
int create_ketama(struct ketama *, int);
void free_ketama(struct ketama *);
int get_server(struct ketama *, const char *);
#endif
# make
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
make: *** Error 1
解决方案:
# ln -svf /usr/lib/libevent* /usr/lib64/
`/usr/lib64/libevent-2.0.so.5' -> `/usr/lib/libevent-2.0.so.5'
`/usr/lib64/libevent-2.0.so.5.1.7' -> `/usr/lib/libevent-2.0.so.5.1.7'
`/usr/lib64/libevent.a' -> `/usr/lib/libevent.a'
`/usr/lib64/libevent_core-2.0.so.5' -> `/usr/lib/libevent_core-2.0.so.5'
`/usr/lib64/libevent_core-2.0.so.5.1.7' -> `/usr/lib/libevent_core-2.0.so.5.1.7'
`/usr/lib64/libevent_core.a' -> `/usr/lib/libevent_core.a'
`/usr/lib64/libevent_core.la' -> `/usr/lib/libevent_core.la'
`/usr/lib64/libevent_core.so' -> `/usr/lib/libevent_core.so'
`/usr/lib64/libevent_extra-2.0.so.5' -> `/usr/lib/libevent_extra-2.0.so.5'
`/usr/lib64/libevent_extra-2.0.so.5.1.7' -> `/usr/lib/libevent_extra-2.0.so.5.1.7'
`/usr/lib64/libevent_extra.a' -> `/usr/lib/libevent_extra.a'
`/usr/lib64/libevent_extra.la' -> `/usr/lib/libevent_extra.la'
`/usr/lib64/libevent_extra.so' -> `/usr/lib/libevent_extra.so'
`/usr/lib64/libevent.la' -> `/usr/lib/libevent.la'
`/usr/lib64/libevent_pthreads-2.0.so.5' -> `/usr/lib/libevent_pthreads-2.0.so.5'
`/usr/lib64/libevent_pthreads-2.0.so.5.1.7' -> `/usr/lib/libevent_pthreads-2.0.so.5.1.7'
`/usr/lib64/libevent_pthreads.a' -> `/usr/lib/libevent_pthreads.a'
`/usr/lib64/libevent_pthreads.la' -> `/usr/lib/libevent_pthreads.la'
`/usr/lib64/libevent_pthreads.so' -> `/usr/lib/libevent_pthreads.so'
`/usr/lib64/libevent.so' -> `/usr/lib/libevent.so'
# make
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: *** Error 1
解决方案:
如果是64bit的系统则不会在/usr/lib64/libm.a 生成，如果是32bit即会有
# yum install glibc glibc-devel
# cp /usr/lib64/libm.so /usr/lib64/libm.a
# make
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 `gettime':
/usr/local/src/libevent-2.0.19-stable/event.c:366: undefined reference to `clock_gettime'
/usr/lib64/libevent.a(event.o): In function `detect_monotonic':
/usr/local/src/libevent-2.0.19-stable/event.c:336: undefined reference to `clock_gettime'
collect2: ld returned 1 exit status
make: *** Error 1
解决方案:
# vim Makefile
CFLAGS = -Wall -g -O2 -I/usr/local/include $(M64)
改为:
CFLAGS = -lrt -Wall -g -O2 -I/usr/local/include $(M64)
# make
gcc -lrt -Wall -g -O2 -I/usr/local/include -m64 -o magent magent.o ketama.o /usr/lib64/libevent.a /usr/lib64/libm.a
# ls 终于成功了- -!
ketama.cketama.hketama.omagentmagent-0.6.tar.gzmagent.cmagent.oMakefile
# cp magent /bin/
[*] 启动memcached
memecached默认不允许root用户启动进程,需要为memcached创建一个用户
# useradd -s /sbin/nologin memcached
# memcached -c 10240 -l 192.168.40.144 -p 11215 -u memcached -m 10 -n 40 -f 2 -d
# memcached -c 10240 -l 192.168.40.144 -p 11216 -u memcached -m 10 -n 40 -f 2 -d
# ps -ef | grep memcached | grep -v "grep"
501 11784 10 01:34 ? 00:00:00 memcached -c 10240 -l 192.168.40.144 -p 11215 -u memcached -m 10 -n 40 -f 2 -d
501 11791 10 01:35 ? 00:00:00 memcached -c 10240 -l 192.168.40.144 -p 11216 -u memcached -m 10 -n 40 -f 2 -d
[*] 启用magent管理memcached
# magent -u root -n 51200 -l 192.168.40.144 -p 12001 -s 192.168.40.144:11215-b 192.168.40.144:11216# -S为主服务器 -b为备服务器
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