简介 Memcache是danga.com的一个项目,最早是为 LiveJournal 服务的,目前全世界不少人使用这个缓存项目来构建自己大负载的网站,来分担数据库的压力。Memcache官方网站:http://memcached.org/
1,安装 下载地址: http://www.memcached.org/downloads,我们线上使用的比较稳定的版本是1.4.15,如果官网找不到以前的版本了,可以去我的csdn资源里面下载此版本,下载地址: memcache1.4.15 :http://download.iyunv.com/detail/mchdba/7562193 libevent2:http://download.iyunv.com/detail/mchdba/7562201 或者去官网下载最新的: wget http://memcached.org/latest [iyunv@localhost ~]#tar -xvf memcached-1.4.15.tar.gz [iyunv@localhost ~]# cd memcached-1.4.15 [iyunv@localhost memcached-1.4.15]# ./configure && make && make test && sudo make install …… checking for library containing clock_gettime... -lrt checking for library containing socket... none required checking for library containing gethostbyname... none required checking for libevent directory... configure: error: libevent is required. You can get it from http://www.monkey.org/~provos/libevent/ If it's already installed, specify its path using --with-libevent=/dir/ 看到提示,需要先安装libevent包,lebevent主要用于socket的处理, wget https://github.com/downloads/lib ... .0.21-stable.tar.gz tar -xvf libevent-2.0.21-stable.tar.gz cd libevent-2.0.21-stable ./configure --prefix=/usr/local/libevent make make install #删除原来的目录,重新解压缩进行编译安装 [iyunv@localhost ~]#rm -rf /root/memcached-1.4.15/ [iyunv@localhost ~]# tar -xvf memcached-1.4.15.tar.gz [iyunv@localhost ~]# cd /root/memcached-1.4.15/ [iyunv@localhost memcached-1.4.15]# ./configure --with-libevent=/usr/local/libevent --prefix=/usr/local/memcache [iyunv@localhost memcached-1.4.15]# make [iyunv@localhost memcached-1.4.15]# make test [iyunv@localhost memcached-1.4.15]# make install 2,如何运行memcache/usr/local/bin/memcached -d -m 10 -u root -l 10.xx.xx.xx -p 12000 -c 1024 –P /tmp/memcached.pid ## 相关选项说明 -d 表示启动一个守护进程 -m 是分配给memcached使用的内存 -u 运行memcached的用户 -l 是memcached监听的ip -p 是memcached监听的端口 -c memcache运行的最大并发连接数 -P 是设置memcache的pid文件 [iyunv@localhost ~]# /usr/local/memcache/bin/memcached -d -u nobody -m 1024 -t 64 -c 2048 -k -I 1M -L -l 127.0.0.1 -p11211 -P /var/memcached/memcached_11211.pid Cannot enable large pages on this system (There is no Linux support as of this version) [iyunv@localhost ~]# Cannot enable large pages,启动命令不合适,换成如下 /usr/local/memcache/bin/memcached -d -m 1024 -u root -l 10.xx.xx.xx -p 11211 -c 2048 -P /var/memcached/memcached.pid 3,实现service启动停止以及查看状态然后执行如下,加载到启动项: chkconfig --add memcache #注册服务 chmod 700 memcache chkconfig --level 345 memcache on #指定服务在3、4、5级别运行 4,简单测试[iyunv@localhost ~]# telnet 127.0.0.1 11211 # 存一个简单的key1,值为123456 Trying 127.0.0.1... Connected to 127.0.0.1. Escape character is '^]'. set key1 0 0 6 123456 STORED #存储成功 quit Connection closed by foreign host. [iyunv@localhost ~]# telnet 127.0.0.1 11211 # 去获取这个key1的值 Trying 127.0.0.1... Connected to 127.0.0.1. Escape character is '^]'. get key1 VALUE key1 0 6 123456 #获取成功 END 5,memcache的使用有些是转载的,原文地址:http://blog.iyunv.com/heiyeshuwu 6,memcache性能监控6.1,安装python插件下载地址:http://download.iyunv.com/detail/wufongming/1159646 tar -xvf python-memcached-latest.tar.gz cd python-memcached-1.43 python setup.py install 运行上面的命令的时候出现如下错误 Traceback (most recent call last): File "setup.py", line 3, in ? from setuptools import setup ImportError: No module named setuptools 解决办法:yum -y install python-setuptools 安装成功后再次 python setup.py install 安装就可以成功了。
6.2,下载安装插件[iyunv@squid-2 soft]# wget http://s1.dlnws.com/dealnews/dev ... emcached-1.0.tar.gz 解压缩: [iyunv@squid-2 soft]# tar -xvf cacti-memcached-1.0.tar.gz cacti-memcached-1.0/ cacti-memcached-1.0/cacti_memcached_host_template.xml cacti-memcached-1.0/INSTALL cacti-memcached-1.0/memcached.py cacti-memcached-1.0/README [iyunv@squid-2 soft]# 将监控文件memcached.py复制到cacti的scripts文件目录下 [iyunv@squid-2 cacti-memcached-1.0]# pwd /root/soft/cacti-memcached-1.0 [iyunv@squid-2 cacti-memcached-1.0]# cp memcached.py /var/www/html/cacti/scripts/ [iyunv@squid-2 cacti-memcached-1.0]# 赋予执行用户权限 [iyunv@squid-2 cacti-memcached-1.0]# chown -R apache.apache /var/www/html/cacti/scripts/memcached.py [iyunv@squid-2 cacti-memcached-1.0]# 6.3,在cacti界面导入memcache模板文件将解压缩的cacti_memcached_host_template.xml文件copy到本地E:\u\memcache,然后进入“console”,再进入“Import Templates”,再进入“选择文件”,选择E:\u\memcache下的cacti_memcached_host_template.xml文件,然后点击右下角的“Import”按钮。导入完后,会在Graph Templates看到memcache的6项监控服务,如下图所示:
6.4,在界面添加memcache主机服务进入“Devices”,点击右上角的“Add”按钮, 填写主机名称和主机ip地址,在“Host Template”下拉框里面选择“Memcached Server”选项,点击右下角的“Save”按钮创建memcache服务主机,如下图所示。
6.5,给memcache主机添加监控图选择“Devices”,点击主机名称连接“xx.xx_memcache”,在新的界面中,点击右上角的“Create Graphs for this Host”,然后在新的页面中选择6个Memcache监控选项,点击右下角的“Create”按钮,就创建好了memcache监控图,如下图所示:
6.6,查看memcache监控图 选择“monitor”,再选择右边的“Tree View”,再选择左边的memcache主机名称,就会在右边出现6个监控图,如下所示: (1) Memcached - Bytes Used
(2)Memcached - Cache Hits and Misses
(3)Memcached - Current Connections
(4)Memcached - Items Cached
(5)Memcached - Network Traffic (bits/sec)
(6)Memcached - Requests/sec (get/set)
以上设置只是针对默认端口11211,但是当你的端口不是11211,而是其他的端口,比如我的是12000,这样的话你就要对你的cacti的data source做下小更改了,操作如下: Console---Data Input Methods--Memcached – Statistics 找到Input String的值python /scripts/memcached.py 更改成:python /scripts/memcached.py –p 12000 如果你是其他端口的,只要将端口号更改成其他的值就可以了! 6.7,遇到的问题总结(1)有图出不来数据,显示为nan值,问题出在,没有安装 python-memcached-latest.tar.gz插件导致。安装完插件后,重启cacti服务,图上的数据显示出来了。 (2)网卡监控流量选项选择不了,报错: This data query returned 0 rows, perhaps there was a problem executing this data query. You can run this data query in debug mode to get more information.
解决方案如下: a,第一种
打开默认的/etc/snmp/snmpd.conf文件,更改如下配置:
1、查找以下字段:
sec.name source community
com2sec notConfigUser default public
将"comunity"字段改为你要设置的密码.比如"public". 2、查找以下字段:
# Finally, grant the group read-only access to the systemview view.
# group context sec.model sec.level prefix read write notif
access notConfigGroup "" any noauth exact all none none
将"systemview"字段改为all. 3、查找以下字段:
# incl/excl subtree mask
#view all included .1 80
将该行前面的"#"去掉. 然后重启snmpd服务,就OK了。 b,另外还有一种办法如下: 如下:
编辑linux主机下的/etc/snmp/snmpd.conf文件
找到62行:
access notConfigGroup "" any noauth exact systemview none none
修改成:(如果有#号,把#号去掉)
access notConfigGroup "" any noauth exact mib2 none none
找到89行,把改行的#去掉:
#view mib2 included .iso.org.dod.internet.mgmt.mib-2 fc
修改成:
view mib2 included .iso.org.dod.internet.mgmt.mib-2 fc
重起snmpd服务,service snmpd restart
参考文章地址: http://blog.chinaunix.net/uid-20639775-id-154601.html https://code.google.com/p/memcached/wiki/NewStart 简介 Memcache是danga.com的一个项目,最早是为 LiveJournal 服务的,目前全世界不少人使用这个缓存项目来构建自己大负载的网站,来分担数据库的压力。Memcache官方网站:http://memcached.org/
1,安装 下载地址: http://www.memcached.org/downloads,我们线上使用的比较稳定的版本是1.4.15,如果官网找不到以前的版本了,可以去我的csdn资源里面下载此版本,下载地址: memcache1.4.15 :http://download.iyunv.com/detail/mchdba/7562193 libevent2:http://download.iyunv.com/detail/mchdba/7562201 或者去官网下载最新的: wget http://memcached.org/latest [iyunv@localhost ~]#tar -xvf memcached-1.4.15.tar.gz [iyunv@localhost ~]# cd memcached-1.4.15 [iyunv@localhost memcached-1.4.15]# ./configure && make && make test && sudo make install …… checking for library containing clock_gettime... -lrt checking for library containing socket... none required checking for library containing gethostbyname... none required checking for libevent directory... configure: error: libevent is required. You can get it from http://www.monkey.org/~provos/libevent/ If it's already installed, specify its path using --with-libevent=/dir/ 看到提示,需要先安装libevent包,lebevent主要用于socket的处理, wget https://github.com/downloads/lib ... .0.21-stable.tar.gz tar -xvf libevent-2.0.21-stable.tar.gz cd libevent-2.0.21-stable ./configure --prefix=/usr/local/libevent make make install #删除原来的目录,重新解压缩进行编译安装 [iyunv@localhost ~]#rm -rf /root/memcached-1.4.15/ [iyunv@localhost ~]# tar -xvf memcached-1.4.15.tar.gz [iyunv@localhost ~]# cd /root/memcached-1.4.15/ [iyunv@localhost memcached-1.4.15]# ./configure --with-libevent=/usr/local/libevent --prefix=/usr/local/memcache [iyunv@localhost memcached-1.4.15]# make [iyunv@localhost memcached-1.4.15]# make test [iyunv@localhost memcached-1.4.15]# make install 2,如何运行memcache/usr/local/bin/memcached -d -m 10 -u root -l 10.xx.xx.xx -p 12000 -c 1024 –P /tmp/memcached.pid ## 相关选项说明 -d 表示启动一个守护进程 -m 是分配给memcached使用的内存 -u 运行memcached的用户 -l 是memcached监听的ip -p 是memcached监听的端口 -c memcache运行的最大并发连接数 -P 是设置memcache的pid文件 [iyunv@localhost ~]# /usr/local/memcache/bin/memcached -d -u nobody -m 1024 -t 64 -c 2048 -k -I 1M -L -l 127.0.0.1 -p11211 -P /var/memcached/memcached_11211.pid Cannot enable large pages on this system (There is no Linux support as of this version) [iyunv@localhost ~]# Cannot enable large pages,启动命令不合适,换成如下 /usr/local/memcache/bin/memcached -d -m 1024 -u root -l 10.xx.xx.xx -p 11211 -c 2048 -P /var/memcached/memcached.pid 3,实现service启动停止以及查看状态然后执行如下,加载到启动项: chkconfig --add memcache #注册服务 chmod 700 memcache chkconfig --level 345 memcache on #指定服务在3、4、5级别运行 4,简单测试[iyunv@localhost ~]# telnet 127.0.0.1 11211 # 存一个简单的key1,值为123456 Trying 127.0.0.1... Connected to 127.0.0.1. Escape character is '^]'. set key1 0 0 6 123456 STORED #存储成功 quit Connection closed by foreign host. [iyunv@localhost ~]# telnet 127.0.0.1 11211 # 去获取这个key1的值 Trying 127.0.0.1... Connected to 127.0.0.1. Escape character is '^]'. get key1 VALUE key1 0 6 123456 #获取成功 END 5,memcache的使用有些是转载的,原文地址:http://blog.iyunv.com/heiyeshuwu 6,memcache性能监控6.1,安装python插件下载地址:http://download.iyunv.com/detail/wufongming/1159646 tar -xvf python-memcached-latest.tar.gz cd python-memcached-1.43 python setup.py install 运行上面的命令的时候出现如下错误 Traceback (most recent call last): File "setup.py", line 3, in ? from setuptools import setup ImportError: No module named setuptools 解决办法:yum -y install python-setuptools 安装成功后再次 python setup.py install 安装就可以成功了。 6.2,下载安装插件[iyunv@squid-2 soft]# wget http://s1.dlnws.com/dealnews/dev ... emcached-1.0.tar.gz 解压缩: [iyunv@squid-2 soft]# tar -xvf cacti-memcached-1.0.tar.gz cacti-memcached-1.0/ cacti-memcached-1.0/cacti_memcached_host_template.xml cacti-memcached-1.0/INSTALL cacti-memcached-1.0/memcached.py cacti-memcached-1.0/README [iyunv@squid-2 soft]# 将监控文件memcached.py复制到cacti的scripts文件目录下 [iyunv@squid-2 cacti-memcached-1.0]# pwd /root/soft/cacti-memcached-1.0 [iyunv@squid-2 cacti-memcached-1.0]# cp memcached.py /var/www/html/cacti/scripts/ [iyunv@squid-2 cacti-memcached-1.0]# 赋予执行用户权限 [iyunv@squid-2 cacti-memcached-1.0]# chown -R apache.apache /var/www/html/cacti/scripts/memcached.py [iyunv@squid-2 cacti-memcached-1.0]# 6.3,在cacti界面导入memcache模板文件将解压缩的cacti_memcached_host_template.xml文件copy到本地E:\u\memcache,然后进入“console”,再进入“Import Templates”,再进入“选择文件”,选择E:\u\memcache下的cacti_memcached_host_template.xml文件,然后点击右下角的“Import”按钮。导入完后,会在Graph Templates看到memcache的6项监控服务,如下图所示:
6.4,在界面添加memcache主机服务进入“Devices”,点击右上角的“Add”按钮, 填写主机名称和主机ip地址,在“Host Template”下拉框里面选择“Memcached Server”选项,点击右下角的“Save”按钮创建memcache服务主机,如下图所示。
6.5,给memcache主机添加监控图选择“Devices”,点击主机名称连接“xx.xx_memcache”,在新的界面中,点击右上角的“Create Graphs for this Host”,然后在新的页面中选择6个Memcache监控选项,点击右下角的“Create”按钮,就创建好了memcache监控图,如下图所示:
6.6,查看memcache监控图选择“monitor”,再选择右边的“Tree View”,再选择左边的memcache主机名称,就会在右边出现6个监控图,如下所示: (1) Memcached - Bytes Used
(2)Memcached - Cache Hits and Misses
(3)Memcached - Current Connections
(4)Memcached - Items Cached
(5)Memcached - Network Traffic (bits/sec)
(6)Memcached - Requests/sec (get/set)
以上设置只是针对默认端口11211,但是当你的端口不是11211,而是其他的端口,比如我的是12000,这样的话你就要对你的cacti的data source做下小更改了,操作如下: Console---Data Input Methods--Memcached – Statistics 找到Input String的值python /scripts/memcached.py 更改成:python /scripts/memcached.py –p 12000 如果你是其他端口的,只要将端口号更改成其他的值就可以了! 6.7,遇到的问题总结(1)有图出不来数据,显示为nan值,问题出在,没有安装 python-memcached-latest.tar.gz插件导致。安装完插件后,重启cacti服务,图上的数据显示出来了。 (2)网卡监控流量选项选择不了,报错: This data query returned 0 rows, perhaps there was a problem executing this data query. You can run this data query in debug mode to get more information.
解决方案如下: a,第一种
打开默认的/etc/snmp/snmpd.conf文件,更改如下配置:
1、查找以下字段:
sec.name source community
com2sec notConfigUser default public
将"comunity"字段改为你要设置的密码.比如"public". 2、查找以下字段:
# Finally, grant the group read-only access to the systemview view.
# group context sec.model sec.level prefix read write notif
access notConfigGroup "" any noauth exact all none none
将"systemview"字段改为all. 3、查找以下字段:
# incl/excl subtree mask
#view all included .1 80
将该行前面的"#"去掉. 然后重启snmpd服务,就OK了。 b,另外还有一种办法如下: 如下:
编辑linux主机下的/etc/snmp/snmpd.conf文件
找到62行:
access notConfigGroup "" any noauth exact systemview none none
修改成:(如果有#号,把#号去掉)
access notConfigGroup "" any noauth exact mib2 none none
找到89行,把改行的#去掉:
#view mib2 included .iso.org.dod.internet.mgmt.mib-2 fc
修改成:
view mib2 included .iso.org.dod.internet.mgmt.mib-2 fc
重起snmpd服务,service snmpd restart
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