搭建 CentOS 6 服务器(7) - Memcached、Redis、MongoDB

（一）Memcached 1.4.21

（1）安装libevent

# cd /usr/local/src
# wget http://www.monkey.org/~provos/libevent-1.4.13-stable.tar.gz
# tar xvfz libevent-1.4.13-stable.tar.gz
# cd libevent-1.4.13-stable
# ./configure --prefix=/usr/local/libevent
# make
# make install 
# echo "/usr/local/libevent/lib" > /etc/ld.so.conf.d/libevent.conf
# ldconfig

（2）安装memcached

# cd /usr/local/src
# wget http://memcached.org/files/memcached-1.4.21.tar.gz
# tar -zxvf memcached-1.4.21.tar.gz
# cd memcached-1.4.21
# ./configure --with-libevent=/usr/local/libevent/
# make
# make install 

（3）设置memcached

# useradd -M memcached
# cp /usr/local/src/memcached-1.4.21/scripts/memcached.sysv /etc/rc.d/init.d/memcached
# vi /etc/rc.d/init.d/memcached
  USER=memcached
  # chown $USER /var/run/memcached
  # daemon memcached -d -p $PORT -u $USER  -m $CACHESIZE -c $MAXCONN -P 

/var/run/memcached/memcached.pid $OPTIONS
  daemon --pidfile /var/run/memcached/memcached.pid /usr/local/bin/memcached -d -p $PORT -u $USER  

-m $CACHESIZE -c $MAXCONN -P /var/run/memcached/memcached.pid $OPTIONS
# mkdir /var/run/memcached
# chown memcached /var/run/memcached
# chkconfig --add memcached
# chkconfig --level 345 memcached on
# chkconfig --list memcached

（4）环境确认

# /etc/rc.d/init.d/memcached start
# telnet localhost 11211
  stats
  set mykey 0 900 4 
  ning
  STORED
  get mykey
  VALUE mykey 0 4
  ning
  END
  quit
# /etc/rc.d/init.d/memcached stop

引用

1）存储数据 set <key> <flags> <exptime> <bytes> [noreply]\r\n<value>\r\n
set key 0 900 8 (最后有一个空格)
data_key
STORED

2）获取数据 get <key>\r\n 或者 gets <key1> <key2>\r\n
get key
VALUE key 0 8
data_key
END

gets key1 key2
VALUE key1 0 9 16520
data_key1
VALUE key2 0 9 16521
data_key2
END

3）删除数据 delete <key> [<time>] [noreply]\r\n
delete key2
DELETED

4）其他
没有直接的命令来列举Memcached的所有keys，通过以下步骤可以获取Keys：

①stats items
>stats items
STAT items:3:number 1
STAT items:3:age 498
STAT items:22:number 1
STAT items:22:age 498
END

STAT items:<slabid>:<stat> <value>\r\n
items后的数字是slab id，number后的数字表示该slab下有几个Key。

②stats cachedump <slabid> <limit>
获取每个slab id的cache dump就能看到ITEM了。

>stats cachedump 3 100
ITEM hello [16 b; 1419815687 s]
END

ITEM <key> [<size> b; <time> s]\r\n
ITEM就是所有的Keys。

Memcached的telnet命令详细
可视化的管理工具：phpMemcachedAdmin

（二）Redis 2.8.17

（1）安装Redis

# cd /usr/local/src
# wget http://download.redis.io/releases/redis-2.8.17.tar.gz
# tar xzvf redis-2.8.17.tar.gz
# cd redis-2.8.17
# make

（2）设置Redis

# mkdir /etc/redis
# cp /usr/local/src/redis-2.8.17/redis.conf /etc/redis
# vi /etc/redis/redis.conf
  maxmemory 1GB
  slaveof 192.168.133.139 6379
# vim /etc/sysctl.conf
  vm.overcommit_memory = 1
# sysctl vm.overcommit_memory=1
# echo 1 > /proc/sys/vm/overcommit_memory  

（3）启动设置

# cd /usr/local/src
# wget --no-check-certificate https://raw.github.com/saxenap/install-redis-amazon-linux-

centos/master/redis-server
# mv redis-server /etc/init.d
# chmod 755 /etc/init.d/redis-server
# chkconfig --add redis-server
# chkconfig --level 345 redis-server on
# chkconfig --list redis-server

（4）环境确认

# service redis-server start
# redis-cli
  redis> set foo bar
  OK
  redis> get foo
  "bar"
  redis> exit
# service redis-server stop

可视化的管理工具：phpRedisAdmin

（三）MongoDB 2.6.5

（1）追加Repository

# vi /etc/yum.repos.d/mongodb.repo
  [mongodb]
  name=MongoDB Repository
  baseurl=http://downloads-distro.mongodb.org/repo/redhat/os/i686/
  #baseurl=http://downloads-distro.mongodb.org/repo/redhat/os/x86_64/
  gpgcheck=0
  enabled=1

（2）安装

# yum install -y mongodb-org

（3）启动设置

# chkconfig mongod on

（4）环境确认

# service mongod start
# mongod -version
# mongo
  > use test
  switched to db test
  > db.fish.insert({name: "rensanning"})
  WriteResult({ "nInserted" : 1 })
  > db.fish.find()
  { "_id" : ObjectId("545c8076dd75c0a6975ec7b0"), "name" : "rensanning" }
  > db.dropDatabase()
  { "dropped" : "test", "ok" : 1 }
  > show dbs
  admin  (empty)
  local  0.078GB
  > exit
  bye
# service mongod stop

MongoDB 3
安装

# vi /etc/yum.repos.d/mongodb-org.repo
  [mongodb-org-3.2]
  name=MongoDB Repository
  baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.2/x86_64/
  gpgcheck=1
  enabled=1
  gpgkey=https://www.mongodb.org/static/pgp/server-3.2.asc

启动提示警告

引用

** WARNING: soft rlimits too low. rlimits set to 4096 processes, 64000 files. Number of processes should be at least 32000 : 0.5 times number of files.

# vi /etc/security/limits.conf
mongod soft nofile 64000
mongod hard nofile 64000
mongod soft nproc 32000
mongod hard nproc 32000

引用

** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.
**        We suggest setting it to 'never'
** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.
**        We suggest setting it to 'never'

# vi  /etc/rc.local
if test -f /sys/kernel/mm/transparent_hugepage/enabled; then  # mongodb
   echo never > /sys/kernel/mm/transparent_hugepage/enabled   # mongodb
fi                                                            # mongodb
if test -f /sys/kernel/mm/transparent_hugepage/defrag; then   # mongodb
   echo never > /sys/kernel/mm/transparent_hugepage/defrag    # mongodb
fi                                                            # mongodb
# chmod +x /etc/rc.d/rc.local
# shutdown -r now

修改绑定IP

# vi /etc/mongod.conf

引用

#  bindIp: 127.0.0.1  # Listen to local interface only, comment to listen on all interfaces.
  bindIp: 0.0.0.0

可视化的管理工具：RockMongo