CentOS6.8安装mongodb3.0与备份脚本-创新互联

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

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

[mongodb-org-3.0] name=MongoDB Repository baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.0/x86_64/ gpgcheck=0 enabled=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 runs processManagement: fork: true # fork and run in background pidFilePath: /var/run/mongodb/mongod.pid # location of pidfile # network interfaces net: 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/sh DUMP=/usr/bin/mongodump OUT_DIR=/data1/backup/mongodb/mongod_bak_now BAK_DIR=/data1/backup/mongodb/mongod_bak_list DATE=`date +%F_%H%M%d` #DB_USER=username #DB_PASS= DAYS=7 TAR_BAK="mongodb_bak_$DATE.tar.gz" [ -d $OUT_DIR ] || mkdir -v $OUT_DIR [ -d $BAK_DIR ] || mkdir -v $BAK_DIR BAK_DB(){ cd $OUT_DIR rm -rf $OUT_DIR/* mkdir -p $DATE #$DUMP -u $DB_USER -p $DB_PASS -o $OUT_DIR/$DATE $DUMP -o $OUT_DIR/$DATE tar czvf $BAK_DIR/$TAR_BAK $OUT_DIR/$DATE find $BAK_DIR/ -mtime +$DAYS -delete } RESTORE_ALL(){ cd $OUT_DIR for d in `ls`; do echo $OUT_DIR/$d /usr/bin/mongorestore -d $OUT_DIR/$d done } RESTORE_Choose(){ while true do 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 fi done } 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 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 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！

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