MongoDB 单实例安装

1.环境

OS: CentOS 6.5 x64

MongoDB：3.2.7

MongoDB的集群安装可以参考：http://blog.csdn.net/john_chang11/article/details/51733670

2.下载mongodb https://www.mongodb.com/download-center?jmp=nav#community [root@VM6-56 ~]$ curl -O https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-3.2.7.tgz   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0 71.6M    0  527k    0     0  25212      0  0:49:40  0:00:21  0:49:19 23015

3.安装mongodb
[root@VM6-56 ~]# groupadd mongodb
[root@VM6-56 ~]# useradd -g mongodb mongodb
[root@VM6-56 ~]# passwd mongodb
[root@VM6-56 ~]# mkdir /u01/mongodb -p
[root@VM6-56 ~]# chown mongodb.mongodb /u01/mongodb
[root@VM6-56 ~]# chown mongodb.mongodb mongodb-linux-x86_64-3.2.7.tgz
[root@VM6-56 ~]# mv mongodb-linux-x86_64-3.2.7.tgz /u01/mongodb
[root@VM6-56 ~]# su - mongodb
[mongodb@VM6-56 ~]$ cd /u01/mongodb
[mongodb@VM6-56 mongodb]$ tar -zxvf mongodb-linux-x86_64-3.2.7.tgz
[mongodb@VM6-56 mongodb]$ mv mongodb-linux-x86_64-rhel62-3.2.7 mongodb327
[mongodb@VM6-56 mongodb]$ cd
[mongodb@VM6-56 mongodb]$ vi .bash_profile
export PATH=/u01/mongodb/mongodb327/bin:$PATH:$HOME/bin

3.创建目录
[mongodb@VM6-56 mongodb]$ pwd
/u01/mongodb
[mongodb@VM6-56 mongodb]$ mkdir mongodb     #创建mongodb的base目录
[mongodb@VM6-56 mongodb]$ cd mongodb
[mongodb@VM6-56 mongodb]$ mkdir data logs conf     #创建数据 日志 配置目录
[mongodb@VM6-56 mongodb]$ cd data
[mongodb@VM6-56data]$ mkdir mongo     #创建分片数据目录

4.配置文件
mongod的启动需要指定各种参数，这些参数可以写在文件里也可以在命令行指定，这里采用写在文件里的方式：
[mongodb@VM6-56 mongodb]$ cd conf
[mongodb@VM6-56 conf]$ vi mongo.conf
port = 32001     #端口
dbpath = /u01/mongodb/mongodb/data/mongo     #数据目录
logpath = /u01/mongodb/mongodb/logs/mongo.log     #日志文件
logappend = true     #日志记录方式
pidfilepath = /u01/mongodb/mongodb/logs/mongo.pid
    #pid文件位置
directoryperdb = true
oplogSize = 1024     #操作日志大小，单位为M
fork = true     #独立进程运行
storageEngine=wiredTiger     #新存储引擎
#journal = true     #是否记日志

5.运行

[mongodb@VM6-56 ~]$ mongod -f /u01/mongodb/mongodb/conf/mongo.conf 

about to fork child process, waiting until server is ready for connections.

forked process: 18789
child process started successfully, parent exiting

启动成功，查看日志，日志文件所在的位置在参数文件里有指定：

[mongodb@VM6-56 logs]$ cat
mongo.log 

2016-06-25T20:36:24.508+0800 I CONTROL  [initandlisten] MongoDB starting : pid=19659 port=31001 dbpath=/u01/mongodb/mongodb/data/shard1 64-bit host=VM6-56

2016-06-25T20:36:24.508+0800 I CONTROL  [initandlisten] db version v3.2.7

2016-06-25T20:36:24.508+0800 I CONTROL  [initandlisten] git version: 4249c1d2b5999ebbf1fdf3bc0e0e3b3ff5c0aaf2

2016-06-25T20:36:24.508+0800 I CONTROL  [initandlisten] OpenSSL version: OpenSSL 1.0.1e-fips 11 Feb 2013

2016-06-25T20:36:24.508+0800 I CONTROL  [initandlisten] allocator: tcmalloc

2016-06-25T20:36:24.508+0800 I CONTROL  [initandlisten] modules: none

2016-06-25T20:36:24.508+0800 I CONTROL  [initandlisten] build environment:

2016-06-25T20:36:24.508+0800 I CONTROL  [initandlisten]     distmod: rhel62

2016-06-25T20:36:24.508+0800 I CONTROL  [initandlisten]     distarch: x86_64

2016-06-25T20:36:24.508+0800 I CONTROL  [initandlisten]     target_arch: x86_64

2016-06-25T20:36:24.508+0800 I CONTROL  [initandlisten] options: { config: "/u01/mongodb/mongodb/conf/mongo.cnf", net: { port: 32001 }, processManagement: { fork: true, pidFilePath: "/u01/mongodb/mongodb/logs/mongo.pid" }, replication: { oplogSizeMB: 1024 },
storage: { dbPath: "/u01/mongodb/mongodb/data/mongo", directoryPerDB: true, engine: "wiredTiger" }, systemLog: { destination: "file", logAppend: true, path: "/u01/mongodb/mongodb/logs/mongo.log" } }

2016-07-03T21:53:03.443+0800 I STORAGE  [initandlisten] wiredtiger_open config: create,cache_size=18G,session_max=20000,eviction=(threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),checkpoint=(wait=60,log_size=2GB),statistics_log=(wait=0),

2016-06-25T20:36:25.172+0800 I CONTROL  [initandlisten] 
2016-06-25T20:36:25.172+0800 I CONTROL  [initandlisten] ** WARNING: You are running on a NUMA machine.

2016-06-25T20:36:25.172+0800 I CONTROL  [initandlisten] **          We suggest launching mongod like this to avoid performance problems:

2016-06-25T20:36:25.172+0800 I CONTROL  [initandlisten] **              numactl --interleave=all mongod [other options]

2016-06-25T20:36:25.172+0800 I CONTROL  [initandlisten] 

2016-06-25T20:36:25.172+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.

2016-06-25T20:36:25.172+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'

2016-06-25T20:36:25.172+0800 I CONTROL  [initandlisten] 

2016-06-25T20:36:25.172+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.

2016-06-25T20:36:25.172+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'

2016-06-25T20:36:25.172+0800 I CONTROL  [initandlisten] 

2016-06-25T20:36:25.172+0800 I CONTROL  [initandlisten] ** WARNING: soft rlimits too low. rlimits set to 1024 processes, 655350 files. Number of processes should be at least 327675 : 0.5 times number of files.

2016-06-25T20:36:25.172+0800 I CONTROL  [initandlisten] 

2016-06-25T20:36:25.175+0800 I REPL     [initandlisten] Did not find local voted for document at startup;  NoMatchingDocument: Did not find replica set lastVote document in local.replset.election

2016-06-25T20:36:25.175+0800 I REPL     [initandlisten] Did not find local replica set configuration document at startup;  NoMatchingDocument: Did not find replica set configuration document in local.system.replset

2016-06-25T20:36:25.176+0800 I FTDC     [initandlisten] Initializing full-time diagnostic data capture with directory '/u01/mongodb/mongodb/data/shard1/diagnostic.data'

2016-06-25T20:36:25.176+0800 I NETWORK  [HostnameCanonicalizationWorker] Starting hostname canonicalization worker

2016-06-25T20:36:25.177+0800 I NETWORK  [initandlisten] waiting for connections on port 31001

日志里的内容特别重要，需要认真阅读和特别留意，这里重点关注上面日志里的三个警告：

 ** WARNING: You are running on a NUMA machine.           

 **          We suggest launching mongod like this to avoid performance problems:  

 **              numactl --interleave=all mongod [other options]        

 ** 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'                          

 ** WARNING: soft rlimits too low. rlimits set to 1024 processes, 655350 files. Number of processes should be at least 327675 : 0.5 times number of files.         

解决第二、三警告，切换到root用户执行：

[root@VM6-56 ~]# echo "never" > /sys/kernel/mm/transparent_hugepage/enabled

[root@VM6-56 ~]# echo "never" > /sys/kernel/mm/transparent_hugepage/defrag

解决第四个警告，切换到mongodb用户执行：

[mongodb@VM6-56 ~]$ vi .bash_profile     #在文件最后加：
ulimit -f unlimited -t unlimited -v unlimited -n 64000 -u 64000

解决第一个警告，是改变mongod的启动方式：

[mongodb@VM6-56 ~]$ numactl --interleave=all mongod -f /u01/mongodb/mongodb/conf/shard1.conf

about to fork child process, waiting until server is ready for connections.

forked process: 6426

ERROR: child process failed, exited with error number 48

报错，查看日志：

[mongodb@VM6-56 logs]$ tail /u01/mongodb/mongodb/logs/shard1.log

2016-06-26T14:31:46.500+0800 E NETWORK  [initandlisten] listen(): bind() failed errno:98 Address already in use for socket: 0.0.0.0:31001

2016-06-26T14:31:46.500+0800 E NETWORK  [initandlisten]   addr already in use

2016-06-26T14:31:46.500+0800 E STORAGE  [initandlisten] Failed to set up sockets during startup.

2016-06-26T14:31:46.500+0800 I CONTROL  [initandlisten] dbexit:  rc: 48

通过日志可知错误原因是addr already in use，这是由于mongod进程正在运行需要先关闭：

[root@VM6-56 ~]# ps -ef | grep mongo

root      8083  6176  0 14:40 pts/0    00:00:00 grep mongo

mongodb  18813     1  0 Jun25 ?        00:04:11 mongod -f /u01/mongodb/mongodb/conf/shard2.conf

mongodb  19659     1  0 Jun25 ?        00:04:10 mongod -f /u01/mongodb/mongodb/conf/shard1.conf

[root@VM6-56 ~]# kill 19659

[root@VM6-56 ~]# ps -ef | grep mongo

root      8182  6176  0 14:40 pts/0    00:00:00 grep mongo

mongodb  18813     1  0 Jun25 ?        00:04:11 mongod -f /u01/mongodb/mongodb/conf/shard2.conf

再次启动：

[mongodb@VM6-56 ~]$ numactl --interleave=all mongod -f /u01/mongodb/mongodb/conf/shard1.conf

about to fork child process, waiting until server is ready for connections.

forked process: 8699

child process started successfully, parent exiting

启动成功，再次查看日志，看看还有警告信息没有：

2016-06-26T14:43:18.705+0800 I CONTROL  [initandlisten] MongoDB starting : pid=8699 port=31001 dbpath=/u01/mongodb/mongodb/data/shard1 64-bit host=VM6-56

2016-06-26T14:43:18.705+0800 I CONTROL  [initandlisten] db version v3.2.7

2016-06-26T14:43:18.705+0800 I CONTROL  [initandlisten] git version: 4249c1d2b5999ebbf1fdf3bc0e0e3b3ff5c0aaf2

2016-06-26T14:43:18.705+0800 I CONTROL  [initandlisten] OpenSSL version: OpenSSL 1.0.1e-fips 11 Feb 2013

2016-06-26T14:43:18.705+0800 I CONTROL  [initandlisten] allocator: tcmalloc

2016-06-26T14:43:18.705+0800 I CONTROL  [initandlisten] modules: none

2016-06-26T14:43:18.705+0800 I CONTROL  [initandlisten] build environment:

2016-06-26T14:43:18.705+0800 I CONTROL  [initandlisten]     distmod: rhel62

2016-06-26T14:43:18.705+0800 I CONTROL  [initandlisten]     distarch: x86_64

2016-06-26T14:43:18.705+0800 I CONTROL  [initandlisten]     target_arch: x86_64

2016-06-26T14:43:18.706+0800 I CONTROL  [initandlisten] options: { config: "/u01/mongodb/mongodb/conf/mongo.cnf", net: { port: 32001 }, processManagement: { fork: true, pidFilePath: "/u01/mongodb/mongodb/logs/mongo.pid" }, replication: { oplogSizeMB: 1024 },
storage: { dbPath: "/u01/mongodb/mongodb/data/mongo", directoryPerDB: true, engine: "wiredTiger" }, systemLog: { destination: "file", logAppend: true, path: "/u01/mongodb/mongodb/logs/mongo.log" } }

2016-07-03T21:53:03.443+0800 I STORAGE  [initandlisten] wiredtiger_open config: create,cache_size=18G,session_max=20000,eviction=(threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),checkpoint=(wait=60,log_size=2GB),statistics_log=(wait=0),

2016-06-26T14:43:19.452+0800 I REPL     [initandlisten] Did not find local voted for document at startup;  NoMatchingDocument: Did not find replica set lastVote document in local.replset.election

2016-06-26T14:43:19.452+0800 I REPL     [initandlisten] Did not find local replica set configuration document at startup;  NoMatchingDocument: Did not find replica set configuration document in local.system.replset

2016-06-26T14:43:19.453+0800 I FTDC     [initandlisten] Initializing full-time diagnostic data capture with directory '/u01/mongodb/mongodb/data/shard1/diagnostic.data'

2016-06-26T14:43:19.453+0800 I NETWORK  [HostnameCanonicalizationWorker] Starting hostname canonicalization worker

2016-06-26T14:43:19.455+0800 I NETWORK  [initandlisten] waiting for connections on port 31001

(END) 

这次没有之前的警告信息了。