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]
(http://www.memcached.org/files/memcached-1.5.3.tar.gz)。
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
修改文件mongodb-3.4.repo
vim /etc/yum.repos.d/mongodb-org-3.4.repo #创建之后可以直接使用yum安装
添加下面的内容，wq保存。
[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
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: ``file
logAppend: ``true
path: ``/data/mongodb/log/mongod``.log
# Where and how to store data.
storage:
dbPath: ``/data/mongodb/data
journal:
enabled: ``true
# engine:
# mmapv1:
# wiredTiger:
# how the process runs
processManagement:
fork: ``true # fork and run in background
pidFilePath: ``/var/run/mongodb/mongod``.pid ``# location of pidfile
# network interfaces
net:
port: 27017
bindIp: 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 127.0.0.1
MongoDB shell version v3.4.10
connecting to: mongodb:``//127``.0.0.1:27017/
MongoDB server version: 3.4.10
Server has startup warnings:
2017-12-06T10:41:30.462+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 ``in
start)
if [ -d ``/sys/kernel/mm/transparent_hugepage ]; ``then
thp_path=``/sys/kernel/mm/transparent_hugepage elif [ -d ``/sys/kernel/mm/redhat_transparent_hugepage ]; ``then
thp_path=``/sys/kernel/mm/redhat_transparent_hugepage else
return 0
fi
echo 'never' > ${thp_path}``/enabled echo 'never' > ${thp_path}``/defrag re=``'^[0-1]+$'
if [[ $(``cat ${thp_path}``/khugepaged/defrag``) =~ $re ]]
then
# RHEL 7
echo 0 > ${thp_path}``/khugepaged/defrag else
# RHEL 6
echo 'no' > ${thp_path}``/khugepaged/defrag fi
unset 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
