CentOS6.8安装mongodb3.0与备份脚本

一、系统环境
CentOS 6.8_x64
官方参考文档https://docs.mongodb.org/manual/reference/glossary/#term-init-script

二、添加官方yum库
#cd /etc/yum.repo.d/
#vim mongodb.repo

[mongodb-org-3.0]name=MongoDB Repositorybaseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.0/x86_64/gpgcheck=0enabled=1

三、安装配置
1、安装并创建数据目录

#yum install -y mongodb-org#mkdir -p /Data/mongodb #chown   mongod.mongod /Data/mongodb -R

2、配置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/mongod.log    #需要自定义# Where and how to store data.storage:  dbPath: /Data/mongodb/db           #需要自定义  journal:    enabled: true#  engine:#  mmapv1:#  wiredTiger:# how the process runsprocessManagement:  fork: true  # fork and run in background  pidFilePath: /var/run/mongodb/mongod.pid  # location of pidfile# network interfacesnet:  port: 27017  bindIp: 10.1.0.7  # Listen to local interface only, comment to listen on all interfaces.    需要自定义#security:#operationProfiling:#replication:#sharding:# Enterprise-Only Options#auditLog:

启动mongod
#service mongod start

四、测试
登录mongodb
#mongo --host 10.1.0.7
> db.version();
3.0.7
> show dbs
com_ylt_plat_passport 0.078GB
local 0.078GB
chown mongod.mongod /Data/mongodb -R
service mongod start

五、排错

故障描述 ：
service mongod stop 时发现 并没有 关闭mongod服务 进程依然在

通过排查发现问题出在/etc/mongod.conf中第24行
pidFilePath: /var/run/mongodb/mongod.pid # location of pidfile
把后面的# location of pidfile 删除掉 即可，这个是一个小bug

六、mogond备份与还原脚本

#cat mongodb_bak.sh

#!/bin/shDUMP=/usr/bin/mongodumpOUT_DIR=/data1/backup/mongodb/mongod_bak_nowBAK_DIR=/data1/backup/mongodb/mongod_bak_listDATE=`date +%F_%H%M%d`#DB_USER=username#DB_PASS=DAYS=7TAR_BAK="mongodb_bak_$DATE.tar.gz"[ -d $OUT_DIR ] || mkdir -v $OUT_DIR[ -d $BAK_DIR ] || mkdir -v $BAK_DIRBAK_DB(){cd $OUT_DIRrm -rf $OUT_DIR/*mkdir -p $DATE#$DUMP -u $DB_USER -p $DB_PASS -o $OUT_DIR/$DATE$DUMP -o $OUT_DIR/$DATEtar czvf $BAK_DIR/$TAR_BAK $OUT_DIR/$DATEfind $BAK_DIR/ -mtime +$DAYS -delete}RESTORE_ALL(){cd $OUT_DIRfor d in `ls`;doecho $OUT_DIR/$d/usr/bin/mongorestore -d $OUT_DIR/$ddone}RESTORE_Choose(){while truedo  echo "when you choose 'quit|exit' exit to restore!"   read -p "What's  your choose?(Enter continue!)" choose  if [[ $choose == 'quit' || $choose == 'exit' ]]  then       echo "You choose exit!" && exit 2  fi  cd $OUT_DIR  d=`ls`  cd $OUT_DIR/$d  ls  read -p "What's db your choose?" whatdb  if [ "$whatdb" != '' ];    then      /usr/bin/mongorestore -d $whatdb  else        echo "choose is empty,exit~" && exit 0  fidone}case $1 in        back)        BAK_DB        ;;        resall)        RESTORE_ALL        ;;        resone)        RESTORE_Choose        ;;        *)        echo "USGE:back|resall|resone"        ;;esac

使用说明:

back 备份全部的mongod数据库

resall 还原所有的数据库

resone可以指定还原某一个数据库

七、解决警告提示
1、问题描述
解决登录mongo --host 10.1.0.7 --port 27017 类似如下提示

** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'. 和 ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.
MongoDB shell version: 3.0.7
connecting to: 10.1.0.7:27017/test
Server has startup warnings:
2016-12-08T16:10:15.638+0800 I CONTROL [initandlisten]
2016-12-08T16:10:15.638+0800 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.
2016-12-08T16:10:15.638+0800 I CONTROL [initandlisten] ** We suggest setting it to 'never'
2016-12-08T16:10:15.638+0800 I CONTROL [initandlisten]
2016-12-08T16:10:15.638+0800 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.
2016-12-08T16:10:15.638+0800 I CONTROL [initandlisten] ** We suggest setting it to 'never'
2016-12-08T16:10:15.638+0800 I CONTROL [initandlisten]

由于环境为CentOS6.8 所以解决方法如下，其他平台及版本请参考官方文档：https://docs.mongodb.org/manual/tutorial/transparent-huge-pages/

2、解决方法：
添加如下脚本
#vim /etc/init.d/disable-transparent-hugepages

#!/bin/sh### 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 INFOcase $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            unset thp_path    ;;    esac

添加到开机自启服务

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

3、修改系统参数

#mkdir -p /etc/tune-profiles/no-thp#cd /etc/tune-profiles/no-thp#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

reboot 系统

4、验证：

$mongo --host 10.1.0.7 --port 27017

MongoDB shell version: 3.0.7

connecting to: 10.1.0.7:27017/test

>

5、出现如下错误：

** WARNING: soft rlimits too low. rlimits set to 1024 processes, 64000 files. Number of processes should be at least 32000 : 0.5 times number of files.

#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mongod

到此mongod安装完成~如有错误之处欢迎指正！