一、系统及安装说明

系统：CentOS6.x_x64，mongodb-3.4.10。mongodb官方下载地址 https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel62-3.4.10.tgz。本次安装选择编辑yum安装。

二、配置官方yum库

1>创建yum安装库文件

#vim /etc/yum.repos.d/mongodb-org-3.4.repo    #创建之后可以直接使用yum安装
[mongodb-org-3.4]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.4/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-3.4.asc

当设置gpgcheck=0时，gpgkey路径可以不设置

2>yum安装

#yum install -y mongodb-org
#当出现以下即为安装中
updates/primary_db                                                                                                                                                                                                                            | 5.3 MB     00:01
Resolving Dependencies
--> Running transaction check
---> Package mongodb-org.x86_64 0:3.4.10-1.el6 will be installed
--> Processing Dependency: mongodb-org-tools = 3.4.10 for package: mongodb-org-3.4.10-1.el6.x86_64
--> Processing Dependency: mongodb-org-shell = 3.4.10 for package: mongodb-org-3.4.10-1.el6.x86_64
--> Processing Dependency: mongodb-org-server = 3.4.10 for package: mongodb-org-3.4.10-1.el6.x86_64
--> Processing Dependency: mongodb-org-mongos = 3.4.10 for package: mongodb-org-3.4.10-1.el6.x86_64
--> Running transaction check
---> Package mongodb-org-mongos.x86_64 0:3.4.10-1.el6 will be installed
---> Package mongodb-org-server.x86_64 0:3.4.10-1.el6 will be installed
---> Package mongodb-org-shell.x86_64 0:3.4.10-1.el6 will be installed
---> Package mongodb-org-tools.x86_64 0:3.4.10-1.el6 will be installed
--> Finished Dependency ResolutionDependencies Resolved=====================================================================================================================================================================================================================================================================Package                                                             Arch                                                    Version                                                          Repository                                                        Size
=====================================================================================================================================================================================================================================================================
Installing:mongodb-org                                                         x86_64                                                  3.4.10-1.el6                                                     mongodb-org-3.4                                                  5.8 k
Installing for dependencies:mongodb-org-mongos                                                  x86_64                                                  3.4.10-1.el6                                                     mongodb-org-3.4                                                   12 Mmongodb-org-server                                                  x86_64                                                  3.4.10-1.el6                                                     mongodb-org-3.4                                                   20 Mmongodb-org-shell                                                   x86_64                                                  3.4.10-1.el6                                                     mongodb-org-3.4                                                   11 Mmongodb-org-tools                                                   x86_64                                                  3.4.10-1.el6                                                     mongodb-org-3.4                                                   49 MTransaction Summary
=====================================================================================================================================================================================================================================================================
Install       5 Package(s)Total size: 91 M
Total download size: 69 M
Installed size: 258 M
Downloading Packages:
(1/2): mongodb-org-server-3.4.10-1.el6.x86_64.rpm                                                                                                                                                                                             |  20 MB     00:03
(2/2): mongodb-org-tools-3.4.10-1.el6.x86_64.rpm                                                                                                                                                                                              |  49 MB     00:15
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                                                                                                                                                3.4 MB/s |  69 MB     00:19

三、自定义安装配置

1>安装成功后，数据和日志目录默认是在 /var/lib/mongo 和 /var/log/mongodb，为方便管理我们可进行自定义。以 /data/mongodb  为例

2>编辑/etc/mongod.conf

#vim /etc/mongod.conf
# mongod.conf# for documentation of all options, see:
#   http://docs.mongodb.org/manual/reference/configuration-options/# where to write logging data.
systemLog:destination: filelogAppend: truepath: /data/mongodb/log/mongod.log# Where and how to store data.
storage:dbPath: /data/mongodb/datajournal:enabled: true
#  engine:
#  mmapv1:
#  wiredTiger:# how the process runs
processManagement:fork: true  # fork and run in backgroundpidFilePath: /var/run/mongodb/mongod.pid  # location of pidfile# network interfaces
net:port: 27017bindIp: 127.0.0.1  # Listen to local interface only, comment to listen on all interfaces.#security:#operationProfiling:#replication:#sharding:## Enterprise-Only Options#auditLog:#snmp

3>创建目录

#mkdir -p /data/mongodb/data
#mkdir -p /data/mongodb/log
#chown   mongod.mongod /data/mongodb -R   #修改权限，否则mongo有可能启动不了

四、启动并测试

1>启动mongod

#service mongod start|stop|restart

2>添加到开机启动项

#chkconfig --add mongod
#chkconfig mongod on

3>登录测试

#mongo --host 127.0.0.1MongoDB shell version v3.4.10
connecting to: mongodb://127.0.0.1:27017/
MongoDB server version: 3.4.10
Server has startup warnings:
2017-12-06T10:41:30.462+0800 I STORAGE  [initandlisten]
2017-12-06T10:41:30.462+0800 I STORAGE  [initandlisten] ** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine
2017-12-06T10:41:30.462+0800 I STORAGE  [initandlisten] **          See http://dochub.mongodb.org/core/prodnotes-filesystem
2017-12-06T10:41:30.901+0800 I CONTROL  [initandlisten]
2017-12-06T10:41:30.902+0800 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.
2017-12-06T10:41:30.902+0800 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.
2017-12-06T10:41:30.902+0800 I CONTROL  [initandlisten]
2017-12-06T10:41:30.902+0800 I CONTROL  [initandlisten]
2017-12-06T10:41:30.902+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.
2017-12-06T10:41:30.902+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2017-12-06T10:41:30.902+0800 I CONTROL  [initandlisten]
2017-12-06T10:41:30.902+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.
2017-12-06T10:41:30.902+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2017-12-06T10:41:30.902+0800 I CONTROL  [initandlisten]
2017-12-06T10:41:30.902+0800 I CONTROL  [initandlisten] ** WARNING: soft rlimits too low. rlimits set to 1024 processes, 65535 files. Number of processes should be at least 32767.5 : 0.5 times number of files.
2017-12-06T10:41:30.902+0800 I CONTROL  [initandlisten]
> show dbs
admin  0.000GB
local  0.000GB
>

五、问题排错

1> 登录mongodb数据库时，如果出现以下错误

MongoDB shell version v3.4.10
connecting to: mongodb://127.0.0.1:27017
MongoDB server version: 3.4.10
Server has startup warnings:
2017-12-06T10:46:46.575+0800 I STORAGE  [initandlisten]
2017-12-06T10:46:46.575+0800 I STORAGE  [initandlisten] ** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine
2017-12-06T10:46:46.575+0800 I STORAGE  [initandlisten] **          See http://dochub.mongodb.org/core/prodnotes-filesystem
2017-12-06T10:46:46.955+0800 I CONTROL  [initandlisten]
2017-12-06T10:46:46.955+0800 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.
2017-12-06T10:46:46.955+0800 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.
2017-12-06T10:46:46.955+0800 I CONTROL  [initandlisten]
2017-12-06T10:46:46.956+0800 I CONTROL  [initandlisten]
2017-12-06T10:46:46.956+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.
2017-12-06T10:46:46.956+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2017-12-06T10:46:46.956+0800 I CONTROL  [initandlisten]
2017-12-06T10:46:46.956+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.
2017-12-06T10:46:46.956+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2017-12-06T10:46:46.956+0800 I CONTROL  [initandlisten]
2017-12-06T10:46:46.956+0800 I CONTROL  [initandlisten] ** WARNING: soft rlimits too low. rlimits set to 1024 processes, 65535 files. Number of processes should be at least 32767.5 : 0.5 times number of files.

环境不通解决办法也不通，详情请参照官方文档 https://docs.mongodb.com/manual/tutorial/transparent-huge-pages/

2>创建脚本

# vim  /etc/init.d/disable-transparent-hugepages

#!/bin/bash### BEGIN INIT INFO
# Provides:          disable-transparent-hugepages
# Required-Start:    $local_fs
# Required-Stop:
# X-Start-Before:    mongod mongodb-mms-automation-agent
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Disable Linux transparent huge pages
# Description:       Disable Linux transparent huge pages, to improve
#                    database performance.
### END INIT INFO
case $1 instart)if [ -d /sys/kernel/mm/transparent_hugepage ]; thenthp_path=/sys/kernel/mm/transparent_hugepage    elif [ -d /sys/kernel/mm/redhat_transparent_hugepage ]; thenthp_path=/sys/kernel/mm/redhat_transparent_hugepage    elsereturn 0fiecho 'never' > ${thp_path}/enabled    echo 'never' > ${thp_path}/defrag    re='^[0-1]+$'if [[ $(cat ${thp_path}/khugepaged/defrag) =~ $re ]]then# RHEL 7echo 0  > ${thp_path}/khugepaged/defrag    else# RHEL 6echo 'no' > ${thp_path}/khugepaged/defrag    fiunset re    unset thp_path    ;;esac

添加到开机服务

#chmod +x /etc/init.d/disable-transparent-hugepages
#chkconfig --add disable-transparent-hugepages

3>创建编辑 /etc/tune-profiles/no-thp/ktune.sh

#vim  /etc/tune-profiles/no-thp/ktune.sh

#echo "set_transparent_hugepages never" > ktune.sh
#chmod +x ktune.sh
#tuned-adm profile no-thp
#如果提示找不到命令请执行yum install tuned -y

#vim /etc/security/limits.conf

添加

mongod soft nofile 64000
mongod hard nofile 64000
mongod soft nproc 32000
mongod hard nproc 32000

重启系统 sudo reboot