本文记录一次在CentOS上安装Memcache的过程，其中也包含了安装过程中遇到的错误以及相应的解决方法。
Libevent安装
可以访问libevent.org网站下载最新的libevent，本文使用的是libevent-2.0.22-stable
，将下载的tar.gz包放到自己想安装的目录下。
解压缩
[root@dev18 libevent]# tar -zvxf libevent-2.0.22-stable.tar.gz
./configure
进入解压后的目录，执行./configure
[root@dev18 libevent]# cd libevent-2.0.22-stable [root@dev18 libevent]# ./configure
执行后，部分配置显示的内容如下：
checking for struct addrinfo... yes checking for struct sockaddr_storage... yes checking for struct in6_addr.s6_addr32... yes checking for struct in6_addr.s6_addr16... yes checking for struct sockaddr_in.sin_len... no checking for struct sockaddr_in6.sin6_len... no checking for struct sockaddr_storage.ss_family... yes checking for struct sockaddr_storage.__ss_family... no checking for socklen_t... yes checking whether our compiler supports __func__... yes checking for the pthreads library -lpthreads... no checking whether pthreads work without any flags... yes checking for joinable pthread attribute... PTHREAD_CREATE_JOINABLE checking if more special flags are required for pthreads... no checking size of pthread_t... 8 checking that generated files are newer than configure... done configure: creating ./config.status config.status: creating libevent.pc config.status: creating libevent_openssl.pc config.status: creating libevent_pthreads.pc config.status: creating Makefile config.status: creating include/Makefile config.status: creating test/Makefile config.status: creating sample/Makefile config.status: creating config.h config.status: executing depfiles commands config.status: executing libtool commands [root@dev18 libevent-2.0.22-stable]#
make
执行make编译
[root@dev18 libevent-2.0.22-stable]# make
部分编译显示的内容如下：
mv -f .deps/regress-regress_dns.Tpo .deps/regress-regress_dns.Po gcc -DHAVE_CONfig_H -I. -I.. -I.. -I../compat -I../include -I../include -DTINYTEST_LOCAL -g -O2 -Wall -fno-strict-aliasing -MT regress-regress_testutils.o -MD -MP -MF .deps/regress-regress_testutils.Tpo -c -o regress-regress_testutils.o `test -f 'regress_testutils.c' || echo './'`regress_testutils.c mv -f .deps/regress-regress_testutils.Tpo .deps/regress-regress_testutils.Po gcc -DHAVE_CONfig_H -I. -I.. -I.. -I../compat -I../include -I../include -DTINYTEST_LOCAL -g -O2 -Wall -fno-strict-aliasing -MT regress-regress_rpc.o -MD -MP -MF .deps/regress-regress_rpc.Tpo -c -o regress-regress_rpc.o `test -f 'regress_rpc.c' || echo './'`regress_rpc.c mv -f .deps/regress-regress_rpc.Tpo .deps/regress-regress_rpc.Po gcc -DHAVE_CONfig_H -I. -I.. -I.. -I../compat -I../include -I../include -DTINYTEST_LOCAL -g -O2 -Wall -fno-strict-aliasing -MT regress-regress.gen.o -MD -MP -MF .deps/regress-regress.gen.Tpo -c -o regress-regress.gen.o `test -f 'regress.gen.c' || echo './'`regress.gen.c mv -f .deps/regress-regress.gen.Tpo .deps/regress-regress.gen.Po gcc -DHAVE_CONfig_H -I. -I.. -I.. -I../compat -I../include -I../include -DTINYTEST_LOCAL -g -O2 -Wall -fno-strict-aliasing -MT regress-regress_et.o -MD -MP -MF .deps/regress-regress_et.Tpo -c -o regress-regress_et.o `test -f 'regress_et.c' || echo './'`regress_et.c mv -f .deps/regress-regress_et.Tpo .deps/regress-regress_et.Po gcc -DHAVE_CONfig_H -I. -I.. -I.. -I../compat -I../include -I../include -DTINYTEST_LOCAL -g -O2 -Wall -fno-strict-aliasing -MT regress-regress_bufferevent.o -MD -MP -MF .deps/regress-regress_bufferevent.Tpo -c -o regress-regress_bufferevent.o `test -f 'regress_bufferevent.c' || echo './'`regress_bufferevent.c mv -f .deps/regress-regress_bufferevent.Tpo .deps/regress-regress_bufferevent.Po gcc -DHAVE_CONfig_H -I. -I.. -I.. -I../compat -I../include -I../include -DTINYTEST_LOCAL -g -O2 -Wall -fno-strict-aliasing -MT regress-regress_listener.o -MD -MP -MF .deps/regress-regress_listener.Tpo -c -o regress-regress_listener.o `test -f 'regress_listener.c' || echo './'`regress_listener.c mv -f .deps/regress-regress_listener.Tpo .deps/regress-regress_listener.Po gcc -DHAVE_CONfig_H -I. -I.. -I.. -I../compat -I../include -I../include -DTINYTEST_LOCAL -g -O2 -Wall -fno-strict-aliasing -MT regress-regress_util.o -MD -MP -MF .deps/regress-regress_util.Tpo -c -o regress-regress_util.o `test -f 'regress_util.c' || echo './'`regress_util.c mv -f .deps/regress-regress_util.Tpo .deps/regress-regress_util.Po gcc -DHAVE_CONfig_H -I. -I.. -I.. -I../compat -I../include -I../include -DTINYTEST_LOCAL -g -O2 -Wall -fno-strict-aliasing -MT regress-tinytest.o -MD -MP -MF .deps/regress-tinytest.Tpo -c -o regress-tinytest.o `test -f 'tinytest.c' || echo './'`tinytest.c mv -f .deps/regress-tinytest.Tpo .deps/regress-tinytest.Po gcc -DHAVE_CONfig_H -I. -I.. -I.. -I../compat -I../include -I../include -DTINYTEST_LOCAL -g -O2 -Wall -fno-strict-aliasing -MT regress-regress_main.o -MD -MP -MF .deps/regress-regress_main.Tpo -c -o regress-regress_main.o `test -f 'regress_main.c' || echo './'`regress_main.c mv -f .deps/regress-regress_main.Tpo .deps/regress-regress_main.Po gcc -DHAVE_CONfig_H -I. -I.. -I.. -I../compat -I../include -I../include -DTINYTEST_LOCAL -g -O2 -Wall -fno-strict-aliasing -MT regress-regress_minheap.o -MD -MP -MF .deps/regress-regress_minheap.Tpo -c -o regress-regress_minheap.o `test -f 'regress_minheap.c' || echo './'`regress_minheap.c mv -f .deps/regress-regress_minheap.Tpo .deps/regress-regress_minheap.Po gcc -DHAVE_CONfig_H -I. -I.. -I.. -I../compat -I../include -I../include -DTINYTEST_LOCAL -g -O2 -Wall -fno-strict-aliasing -MT regress-regress_thread.o -MD -MP -MF .deps/regress-regress_thread.Tpo -c -o regress-regress_thread.o `test -f 'regress_thread.c' || echo './'`regress_thread.c mv -f .deps/regress-regress_thread.Tpo .deps/regress-regress_thread.Po /bin/sh ../libtool --tag=CC --mode=link gcc -g -O2 -Wall -fno-strict-aliasing -o regress regress-regress.o regress-regress_buffer.o regress-regress_http.o regress-regress_dns.o regress-regress_testutils.o regress-regress_rpc.o regress-regress.gen.o regress-regress_et.o regress-regress_bufferevent.o regress-regress_listener.o regress-regress_util.o regress-tinytest.o regress-regress_main.o regress-regress_minheap.o regress-regress_thread.o ../libevent.la ../libevent_pthreads.la -lrt libtool: link: gcc -g -O2 -Wall -fno-strict-aliasing -o .libs/regress regress-regress.o regress-regress_buffer.o regress-regress_http.o regress-regress_dns.o regress-regress_testutils.o regress-regress_rpc.o regress-regress.gen.o regress-regress_et.o regress-regress_bufferevent.o regress-regress_listener.o regress-regress_util.o regress-tinytest.o regress-regress_main.o regress-regress_minheap.o regress-regress_thread.o ../.libs/libevent.so ../.libs/libevent_pthreads.so -lrt -Wl,-rpath -Wl,/usr/local/lib make[3]: Leaving directory `/srv/libevent/libevent-2.0.22-stable/test' make[2]: Leaving directory `/srv/libevent/libevent-2.0.22-stable/test' make[1]: Leaving directory `/srv/libevent/libevent-2.0.22-stable' [root@dev18 libevent-2.0.22-stable]#
make install
执行make install安装Libevent
[root@dev18 libevent-2.0.22-stable]# make install
部分安装显示的内容如下：
See any operating system documentation about shared libraries for more information,such as the ld(1) and ld.so(8) manual pages. ---------------------------------------------------------------------- /bin/mkdir -p '/usr/local/include' /usr/bin/install -c -m 644 event.h evhttp.h evdns.h evrpc.h evutil.h '/usr/local/include' /bin/mkdir -p '/usr/local/lib/pkgconfig' /usr/bin/install -c -m 644 libevent.pc libevent_pthreads.pc '/usr/local/lib/pkgconfig' make[3]: Leaving directory `/srv/libevent/libevent-2.0.22-stable' make[2]: Leaving directory `/srv/libevent/libevent-2.0.22-stable' Making install in include make[2]: Entering directory `/srv/libevent/libevent-2.0.22-stable/include' make[3]: Entering directory `/srv/libevent/libevent-2.0.22-stable/include' make[3]: nothing to be done for `install-exec-am'. /bin/mkdir -p '/usr/local/include' /bin/mkdir -p '/usr/local/include/event2' /usr/bin/install -c -m 644 event2/buffer.h event2/buffer_compat.h event2/bufferevent.h event2/bufferevent_compat.h event2/bufferevent_ssl.h event2/bufferevent_struct.h event2/dns.h event2/dns_compat.h event2/dns_struct.h event2/event.h event2/event_compat.h event2/event_struct.h event2/http.h event2/http_compat.h event2/http_struct.h event2/keyvalq_struct.h event2/listener.h event2/rpc.h event2/rpc_compat.h event2/rpc_struct.h event2/tag.h event2/tag_compat.h event2/thread.h event2/util.h '/usr/local/include/event2' /bin/mkdir -p '/usr/local/include' /bin/mkdir -p '/usr/local/include/event2' /usr/bin/install -c -m 644 ./event2/event-config.h '/usr/local/include/event2' make[3]: Leaving directory `/srv/libevent/libevent-2.0.22-stable/include' make[2]: Leaving directory `/srv/libevent/libevent-2.0.22-stable/include' Making install in sample make[2]: Entering directory `/srv/libevent/libevent-2.0.22-stable/sample' make[3]: Entering directory `/srv/libevent/libevent-2.0.22-stable/sample' make[3]: nothing to be done for `install-exec-am'. make[3]: nothing to be done for `install-data-am'. make[3]: Leaving directory `/srv/libevent/libevent-2.0.22-stable/sample' make[2]: Leaving directory `/srv/libevent/libevent-2.0.22-stable/sample' Making install in test make[2]: Entering directory `/srv/libevent/libevent-2.0.22-stable/test' make install-am make[3]: Entering directory `/srv/libevent/libevent-2.0.22-stable/test' make[4]: Entering directory `/srv/libevent/libevent-2.0.22-stable/test' make[4]: nothing to be done for `install-exec-am'. make[4]: nothing to be done for `install-data-am'. make[4]: Leaving directory `/srv/libevent/libevent-2.0.22-stable/test' make[3]: Leaving directory `/srv/libevent/libevent-2.0.22-stable/test' make[2]: Leaving directory `/srv/libevent/libevent-2.0.22-stable/test' make[1]: Leaving directory `/srv/libevent/libevent-2.0.22-stable' [root@dev18 libevent-2.0.22-stable]#
经过 配置(./configure)、编译 (make) 和安装 (make install) 三个步骤就完成了Libevent的安装。
安装好Libevent之后，我们就能继续前进安装Memcache了。
Memcache安装
和安装Libevent步骤类似，我们还是先下载memcache包，然后通过解压、配置(./configure)、编译 (make) 和安装 (make install) 几个步骤来安装。
访问memcache.org下载Memcache,本文下载的版本是memcached-1.4.33.tar.gz
解压缩
[root@dev18 memcached]# tar -zxvf memcached-1.4.33.tar.gz
./configure
进入解压后的目录，执行./configure
[root@dev18 memcached]# cd memcached-1.4.33 [root@dev18 memcached-1.4.33]# ./configure
部分配置显示的内容如下：
[root@dev18 memcached-1.4.33]# ./configure checking build system type... x86_64-pc-linux-gnu checking host system type... x86_64-pc-linux-gnu checking for a BSD-compatible install... /usr/bin/install -c checking whether build environment is sane... yes checking for a thread-safe mkdir -p... /bin/mkdir -p checking for gawk... gawk checking whether make sets $(MAKE)... yes checking whether make supports nested variables... yes checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking whether gcc understands -c and -o together... yes checking for style of include used by make... GNU checking dependency style of gcc... gcc3 checking how to run the C preprocessor... gcc -E checking for grep that handles long lines and -e... /bin/grep checking for egrep... /bin/grep -E checking for icc in use... no checking for clang in use... no checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes checking whether __SUNPRO_C is declared... no
make
执行make编译
[root@dev18 memcached-1.4.33]# make
部分编译显示的内容如下：
[root@dev18 memcached-1.4.33]# make make all-recursive make[1]: Entering directory `/srv/memcached/memcached-1.4.33' Making all in doc make[2]: Entering directory `/srv/memcached/memcached-1.4.33/doc' make all-am make[3]: Entering directory `/srv/memcached/memcached-1.4.33/doc' make[3]: nothing to be done for `all-am'. make[3]: Leaving directory `/srv/memcached/memcached-1.4.33/doc' make[2]: Leaving directory `/srv/memcached/memcached-1.4.33/doc' make[2]: Entering directory `/srv/memcached/memcached-1.4.33' gcc -std=gnu99 -DHAVE_CONfig_H -I. -DNDEBUG -g -O2 -pthread -pthread -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -fno-strict-aliasing -MT memcached-memcached.o -MD -MP -MF .deps/memcached-memcached.Tpo -c -o memcached-memcached.o `test -f 'memcached.c' || echo './'`memcached.c mv -f .deps/memcached-memcached.Tpo .deps/memcached-memcached.Po gcc -std=gnu99 -DHAVE_CONfig_H -I. -DNDEBUG -g -O2 -pthread -pthread -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -fno-strict-aliasing -MT memcached-hash.o -MD -MP -MF .deps/memcached-hash.Tpo -c -o memcached-hash.o `test -f 'hash.c' || echo './'`hash.c mv -f .deps/memcached-hash.Tpo .deps/memcached-hash.Po gcc -std=gnu99 -DHAVE_CONfig_H -I. -DNDEBUG -g -O2 -pthread -pthread -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -fno-strict-aliasing -MT memcached-jenkins_hash.o -MD -MP -MF .deps/memcached-jenkins_hash.Tpo -c -o memcached-jenkins_hash.o `test -f 'jenkins_hash.c' || echo './'`jenkins_hash.c mv -f .deps/memcached-jenkins_hash.Tpo .deps/memcached-jenkins_hash.Po gcc -std=gnu99 -DHAVE_CONfig_H -I. -DNDEBUG -g -O2 -pthread -pthread -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -fno-strict-aliasing -MT memcached-murmur3_hash.o -MD -MP -MF .deps/memcached-murmur3_hash.Tpo -c -o memcached-murmur3_hash.o `test -f 'murmur3_hash.c' || echo './'`murmur3_hash.c mv -f .deps/memcached-murmur3_hash.Tpo .deps/memcached-murmur3_hash.Po gcc -std=gnu99 -DHAVE_CONfig_H -I. -DNDEBUG -g -O2 -pthread -pthread -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -fno-strict-aliasing -MT memcached-slabs.o -MD -MP -MF .deps/memcached-slabs.Tpo -c -o memcached-slabs.o `test -f 'slabs.c' || echo './'`slabs.c mv -f .deps/memcached-slabs.Tpo .deps/memcached-slabs.Po gcc -std=gnu99 -DHAVE_CONfig_H -I. -DNDEBUG -g -O2 -pthread -pthread -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -fno-strict-aliasing -MT memcached-items.o -MD -MP -MF .deps/memcached-items.Tpo -c -o memcached-items.o `test -f 'items.c' || echo './'`items.c mv -f .deps/memcached-items.Tpo .deps/memcached-items.Po gcc -std=gnu99 -DHAVE_CONfig_H -I. -DNDEBUG -g -O2 -pthread -pthread -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -fno-strict-aliasing -MT memcached-assoc.o -MD -MP -MF .deps/memcached-assoc.Tpo -c -o memcached-assoc.o `test -f 'assoc.c' || echo './'`assoc.c mv -f .deps/memcached-assoc.Tpo .deps/memcached-assoc.Po
mv -f .deps/memcached_debug-bipbuffer.Tpo .deps/memcached_debug-bipbuffer.Po gcc -std=gnu99 -DHAVE_CONfig_H -I. -fprofile-arcs -ftest-coverage -g -O2 -pthread -pthread -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -fno-strict-aliasing -MT memcached_debug-logger.o -MD -MP -MF .deps/memcached_debug-logger.Tpo -c -o memcached_debug-logger.o `test -f 'logger.c' || echo './'`logger.c mv -f .deps/memcached_debug-logger.Tpo .deps/memcached_debug-logger.Po gcc -std=gnu99 -DHAVE_CONfig_H -I. -fprofile-arcs -ftest-coverage -g -O2 -pthread -pthread -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -fno-strict-aliasing -MT memcached_debug-crawler.o -MD -MP -MF .deps/memcached_debug-crawler.Tpo -c -o memcached_debug-crawler.o `test -f 'crawler.c' || echo './'`crawler.c mv -f .deps/memcached_debug-crawler.Tpo .deps/memcached_debug-crawler.Po gcc -std=gnu99 -DHAVE_CONfig_H -I. -fprofile-arcs -ftest-coverage -g -O2 -pthread -pthread -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -fno-strict-aliasing -MT memcached_debug-cache.o -MD -MP -MF .deps/memcached_debug-cache.Tpo -c -o memcached_debug-cache.o `test -f 'cache.c' || echo './'`cache.c mv -f .deps/memcached_debug-cache.Tpo .deps/memcached_debug-cache.Po gcc -std=gnu99 -fprofile-arcs -ftest-coverage -g -O2 -pthread -pthread -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -fno-strict-aliasing -o memcached-debug memcached_debug-memcached.o memcached_debug-hash.o memcached_debug-jenkins_hash.o memcached_debug-murmur3_hash.o memcached_debug-slabs.o memcached_debug-items.o memcached_debug-assoc.o memcached_debug-thread.o memcached_debug-daemon.o memcached_debug-stats.o memcached_debug-util.o memcached_debug-bipbuffer.o memcached_debug-logger.o memcached_debug-crawler.o memcached_debug-cache.o -lgcov -levent -lrt gcc -std=gnu99 -DHAVE_CONfig_H -I. -g -O2 -pthread -pthread -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -fno-strict-aliasing -MT sizes.o -MD -MP -MF .deps/sizes.Tpo -c -o sizes.o sizes.c mv -f .deps/sizes.Tpo .deps/sizes.Po gcc -std=gnu99 -g -O2 -pthread -pthread -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -fno-strict-aliasing -o sizes sizes.o -levent -lrt gcc -std=gnu99 -DHAVE_CONfig_H -I. -g -O2 -pthread -pthread -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -fno-strict-aliasing -MT testapp.o -MD -MP -MF .deps/testapp.Tpo -c -o testapp.o testapp.c mv -f .deps/testapp.Tpo .deps/testapp.Po gcc -std=gnu99 -DHAVE_CONfig_H -I. -g -O2 -pthread -pthread -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -fno-strict-aliasing -MT util.o -MD -MP -MF .deps/util.Tpo -c -o util.o util.c mv -f .deps/util.Tpo .deps/util.Po gcc -std=gnu99 -DHAVE_CONfig_H -I. -g -O2 -pthread -pthread -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -fno-strict-aliasing -MT cache.o -MD -MP -MF .deps/cache.Tpo -c -o cache.o cache.c mv -f .deps/cache.Tpo .deps/cache.Po gcc -std=gnu99 -g -O2 -pthread -pthread -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -fno-strict-aliasing -o testapp testapp.o util.o cache.o -levent -lrt gcc -std=gnu99 -DHAVE_CONfig_H -I. -g -O2 -pthread -pthread -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -fno-strict-aliasing -MT timedrun.o -MD -MP -MF .deps/timedrun.Tpo -c -o timedrun.o timedrun.c mv -f .deps/timedrun.Tpo .deps/timedrun.Po gcc -std=gnu99 -g -O2 -pthread -pthread -Wall -Werror -pedantic -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -fno-strict-aliasing -o timedrun timedrun.o -levent -lrt make[2]: Leaving directory `/srv/memcached/memcached-1.4.33' make[1]: Leaving directory `/srv/memcached/memcached-1.4.33' [root@dev18 memcached-1.4.33]#
make install
执行make install安装Memcache
[root@dev18 memcached-1.4.33]# make install
部分安装显示的内容如下：
[root@dev18 memcached-1.4.33]# make install make install-recursive make[1]: Entering directory `/srv/memcached/memcached-1.4.33' Making install in doc make[2]: Entering directory `/srv/memcached/memcached-1.4.33/doc' make install-am make[3]: Entering directory `/srv/memcached/memcached-1.4.33/doc' make[4]: Entering directory `/srv/memcached/memcached-1.4.33/doc' make[4]: nothing to be done for `install-exec-am'. /bin/mkdir -p '/usr/local/share/man/man1' /usr/bin/install -c -m 644 memcached.1 '/usr/local/share/man/man1' make[4]: Leaving directory `/srv/memcached/memcached-1.4.33/doc' make[3]: Leaving directory `/srv/memcached/memcached-1.4.33/doc' make[2]: Leaving directory `/srv/memcached/memcached-1.4.33/doc' make[2]: Entering directory `/srv/memcached/memcached-1.4.33' make[3]: Entering directory `/srv/memcached/memcached-1.4.33' /bin/mkdir -p '/usr/local/bin' /usr/bin/install -c memcached '/usr/local/bin' /bin/mkdir -p '/usr/local/include/memcached' /usr/bin/install -c -m 644 protocol_binary.h '/usr/local/include/memcached' make[3]: Leaving directory `/srv/memcached/memcached-1.4.33' make[2]: Leaving directory `/srv/memcached/memcached-1.4.33' make[1]: Leaving directory `/srv/memcached/memcached-1.4.33' [root@dev18 memcached-1.4.33]#
同样，
经过 配置(./configure)、编译 (make) 和安装 (make install) 三个步骤就完成了Memcache的安装。
问题及解决
安装好Memcache之后，我们来启动Memcahce，
进入/usr/local/bin目录，执行
memcached -d -m 10 -u root -p 11211 -P /temp/memcached.pid尝试启动Memcache
参数说明：
-d 表示启动的是一个守护线程
-m RAM分配的数量，单位为MB，因为执行小于64MB可能还是会设置成64MB，所以本文就设置为64
摘要https://github.com/memcached/memcached/wiki/ConfiguringServer
-u 指定运行Memcache的用户
-p 执行Memcache监听的端口
-P pid文件保存的地址
出现如下问题：
memcached: error while loading shared libraries: libevent-2.0.so.5: cannot open shared object file: No such file or directory
[root@dev18 ~]# cd /usr/local/bin/ [root@dev18 bin]# memcached -d -m 64 -u root -p 11211 -P /temp/memcached.pid memcached: error while loading shared libraries: libevent-2.0.so.5: cannot open shared object file: No such file or directory [root@dev18 bin]#
首先来看一下，Memcahce是从哪里找livevent-2.0.so.5的，使用LD_DEBUG=libs ./memcached -v命令查看。
[root@dev18 bin]# LD_DEBUG=libs ./memcached -v
3668: find library=libevent-2.0.so.5 [0]; searching
3668: search cache=/etc/ld.so.cache
3668: search path=/lib64/tls/x86_64:/lib64/tls:/lib64/x86_64:/lib64:/usr/lib64/tls/x86_64:/usr/lib64/tls:/usr/lib64/x86_64:/usr/lib64 (system search path)
3668: trying file=/lib64/tls/x86_64/libevent-2.0.so.5
3668: trying file=/lib64/tls/libevent-2.0.so.5
3668: trying file=/lib64/x86_64/libevent-2.0.so.5
3668: trying file=/lib64/libevent-2.0.so.5
3668: trying file=/usr/lib64/tls/x86_64/libevent-2.0.so.5
3668: trying file=/usr/lib64/tls/libevent-2.0.so.5
3668: trying file=/usr/lib64/x86_64/libevent-2.0.so.5
3668: trying file=/usr/lib64/libevent-2.0.so.5
3668:
./memcached: error while loading shared libraries: libevent-2.0.so.5: cannot open shared object file: No such file or directory
[root@dev18 bin]#
从上面的结果可以看出，Memcache会从/usr/lib64/下查找livevent-2.0.so.5。
接下来，看一下libevent的相关路径信息，使用 whereis libevent来查找。
[root@dev18 bin]# whereis libevent libevent: /usr/local/lib/libevent.so /usr/local/lib/libevent.la /usr/local/lib/libevent.a
从上面信息可以看出，libevent是被安装在/usr/local/lib/下了，这样问题就找到了。
正是因为路径不一致导致的问题：
libevent是被安装在/usr/local/lib/下，
Memcache会从/usr/lib64/下查找livevent-2.0.so.5
明白了问题所在，解决的办法就变得简单了，创建一个软链接即可。
ln -s /usr/local/lib/libevent-2.0.so.5 /usr/lib64/libevent-2.0.so.5
重新尝试启动，没有再报错，
[root@dev18 bin]# ln -s /usr/local/lib/libevent-2.0.so.5 /usr/lib64/libevent-2.0.so.5 [root@dev18 bin]# memcached -d -m 64 -u root -p 11211 -P /temp/memcached.pid
使用ps -ef|grep memcached来查看Memcached相关进程，如下：
[root@dev18 bin]# ps -ef|grep memcached root 3764 1 0 11:22 ? 00:00:00 memcached -d -m 10 -u root -p 11211 -P /temp/memcached.pid root 3775 3580 0 11:23 pts/0 00:00:00 grep memcached [root@dev18 bin]#
至此，Memcache的简单安装和启动就完成了。