mongodb 3.2.5安装过程详细记录

r囧r小猫 2022-07-15 14:23 153阅读 0赞

**1. 准备安装介质**

安装介质下载：  
mongodb的安装方式，我通常使用二进制包的方式，内网不能配置连接外网的yum源；  
官方建议的mongodb下载地址为：   Downloads.mongodb.org  
但实际上，这个地址，很难找到下载表，正常下载，通常可以用下面的下载地址选择下载：

[https://www.mongodb.org/dl/linux/x86\_64][https_www.mongodb.org_dl_linux_x86_64]

我这里下载的是： 3.2.5 版本对应的 mongodb-linux-x86\_64-rhel62-3.2.5-20-g07e21d8.tgz

如果将整个mongodb安装过程已经编写了脚本，可以获取安装脚本，用脚本执行安装；

如果手动安装，则可跳过此步；

手工安装mongodb的脚步的执行过程，一般如下：

mkdir -p /root/\{software,scripts\}

wget -q  http://ptmaster.test.cn/files/init/mongodb\_install.sh  -O /root/scripts/mongodb\_install.sh

cd /root/scripts

./mongodb\_install.sh -p 27117

**2. 添加mongodb用户和环境变量，修改系统设置**

添加用户：

groupadd mongodb

useradd -g mongodb mongodb

创建mongodb脚本目录

mkdir -p /home/mongodb/scripts/

修改目录权限：

chown -R mongodb:mongodb  /home/mongodb/scripts/

在 /etc/profile 中添加 mongodb 用户的环境变量：

\# MongoDB Environment Variables

export PATH=$PATH:$HOME/bin:/usr/local/mongodb/bin:/home/mongodb/scripts/

是上面的变量生效：

source /etc/profile

实际操作过程如下：

[root@yq-mapp-otadb248 etc]# id mongodb
    id: mongodb: No such user
    [root@yq-mapp-otadb248 etc]# 
    [root@yq-mapp-otadb248 etc]# 
    [root@yq-mapp-otadb248 etc]# groupadd mongodb 
    useradd -g mongodb mongodb[root@yq-mapp-otadb248 etc]# useradd -g mongodb mongodb
    [root@yq-mapp-otadb248 etc]# 
    [root@yq-mapp-otadb248 etc]# 
    [root@yq-mapp-otadb248 etc]# id mongodb
    uid=801(mongodb) gid=801(mongodb) groups=801(mongodb)
    [root@yq-mapp-otadb248 etc]#

mongodb要求hugepage设置为禁用，soft limit设置足够大，可以在一开始修改，也可以到后面修改；

cat /etc/security/limits.d/90-nproc.conf

修改这个文件中下列的值

\*               soft    nproc  2048

确保： soft nproc 的值至少是 soft nofile 值的一半；

修改后，退出当前用户，重新进入一下，设置就可以生效了；

禁用 hugepage 的值：

\# echo "never" > /sys/kernel/mm/transparent\_hugepage/enabled

\# echo "never" >  /sys/kernel/mm/transparent\_hugepage/defrag

备注：上面两个警告，现在不修改也不影响安装过程，后面会提示。

**3. 安装mongodb软件**

上传并解压软件：

cd /usr/local

rz mongodb-linux-x86\_64-rhel62-3.2.5-20-g07e21d8.tgz

tar -zxvf mongodb-linux-x86\_64-rhel62-3.2.5-20-g07e21d8.tgz

ln -sv mongodb-linux-x86\_64-rhel62-3.2.5-20-g07e21d8 /usr/local/mongodb

修改文件权限：

chown -R mongodb:mongodb mongodb-linux-x86\_64-rhel62-3.2.5-20-g07e21d8

chown -R mongodb:mongodb /usr/local/mongodb

实际操作过程如下：

[root@yq-mapp-otadb248 src]# rz 
    rz waiting to receive.
    Starting zmodem transfer.  Press Ctrl+C to cancel.
    Transferring mongodb-linux-x86_64-rhel62-3.2.5.tar.gz...
      100%   66999 KB    16749 KB/sec    00:00:04       0 Errors  
    
    [root@yq-mapp-otadb248 src]# ll
    total 277792
    -rw-r--r-- 1 root root  68607629 Oct 19 11:53 mongodb-linux-x86_64-rhel62-3.2.5.tar.gz
    -rw-r--r-- 1 root root 215848960 Apr 19  2016 mongodb-linux-x86_64-rhel62-v3.2-latest
    [root@yq-mapp-otadb248 src]# 
    [root@yq-mapp-otadb248 src]# tar -zxvf mongodb-linux-x86_64-rhel62-3.2.5.tar.gz 
    mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8/bin/
    mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8/bin/mongooplog
    mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8/bin/mongod
    mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8/bin/mongo
    mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8/bin/mongofiles
    mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8/bin/bsondump
    mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8/bin/mongorestore
    mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8/bin/mongos
    mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8/bin/mongoexport
    mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8/bin/mongodump
    mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8/bin/mongoimport
    mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8/bin/mongotop
    mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8/bin/mongostat
    mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8/bin/mongoperf
    mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8/GNU-AGPL-3.0
    mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8/MPL-2
    mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8/README
    mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8/THIRD-PARTY-NOTICES
    [root@yq-mapp-otadb248 src]# 
    [root@yq-mapp-otadb248 src]# ll
    total 277796
    drwxr-xr-x 3 root root      4096 Oct 19 11:54 mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8
    -rw-r--r-- 1 root root  68607629 Oct 19 11:53 mongodb-linux-x86_64-rhel62-3.2.5.tar.gz
    -rw-r--r-- 1 root root 215848960 Apr 19  2016 mongodb-linux-x86_64-rhel62-v3.2-latest
    [root@yq-mapp-otadb248 src]# 
    [root@yq-mapp-otadb248 src]# mv mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8 ../
    [root@yq-mapp-otadb248 src]# cd ..
    [root@yq-mapp-otadb248 local]# 
    [root@yq-mapp-otadb248 local]# ln -sv mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8 /usr/local/mongodb
    `/usr/local/mongodb' -> `mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8'
    [root@yq-mapp-otadb248 local]# 
    [root@yq-mapp-otadb248 local]# chown -R mongodb:mongodb mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8
    [root@yq-mapp-otadb248 local]# chown -R mongodb:mongodb /usr/local/mongodb
    [root@yq-mapp-otadb248 local]# 
    [root@yq-mapp-otadb248 local]# ll
    total 52
    drwxr-xr-x.  2 root     root     4096 Apr 24  2014 bin
    drwxr-xr-x.  2 root     root     4096 Sep 23  2011 etc
    drwxr-xr-x.  2 root     root     4096 Sep 23  2011 games
    drwxr-xr-x.  2 root     root     4096 Sep 23  2011 include
    drwxr-xr-x.  2 root     root     4096 Sep 23  2011 lib
    drwxr-xr-x.  3 root     root     4096 Apr 25  2014 lib64
    drwxr-xr-x.  2 root     root     4096 Sep 23  2011 libexec
    lrwxrwxrwx   1 root     root       25 Mar  6  2015 logstash -> /usr/local/logstash-1.4.2
    drwxrwxr-x   8 logstash logstash 4096 Jun 24  2014 logstash-1.4.2
    lrwxrwxrwx   1 mongodb  mongodb    45 Oct 19 11:59 mongodb -> mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8
    drwxr-xr-x   3 mongodb  mongodb  4096 Oct 19 11:54 mongodb-linux-x86_64-rhel62-3.2.5-20-g07e21d8
    lrwxrwxrwx   1 root     root       39 Apr 23  2014 mysql -> /usr/local/mysql-5.5.19-linux2.6-x86_64
    drwxr-xr-x  12 root     mysql    4096 Apr 23  2014 mysql-5.5.19-linux2.6-x86_64
    drwxr-xr-x.  2 root     root     4096 Sep 23  2011 sbin
    drwxr-xr-x.  6 root     root     4096 Apr 25  2014 share
    drwxr-xr-x.  2 root     root     4096 Oct 19 11:54 src
    [root@yq-mapp-otadb248 local]#

**4. 创建mongodb实例所需的目录和配置文件**

创建mongodb实例所需目录：

mkdir -p /data/mongo\_27117/\{db,log,tmp\}

创建mongodb实例配置文件所需目录和文件：

mkdir -p /etc/mongodb

touch /etc/mongodb/mongo\_27117.conf

根据需要配置mongodb的启动参数，我的启动参数配置内容如下：

vim /etc/mongodb/mongo\_27117.conf

dbpath=/data/mongo_27117/db
    logpath=/data/mongo_27117/log/mongo_27117.log
    pidfilepath = /data/mongo_27117/tmp/mongo_27117.pid
    storageEngine = wiredTiger
    wiredTigerCacheSizeGB = 2
    syncdelay = 30
    wiredTigerCollectionBlockCompressor = zlib 
    port=27117
    auth = true  
    directoryperdb = true 
    oplogSize=2048
    logappend=true
    fork=true
    #rest=true
    journal = true
    journalCommitInterval = 50
    slowms = 200

修改目录、文件的权限和属组：

chown -R mongodb:mongodb /data/mongo\_27117/

chown -R mongodb:mongodb /etc/mongodb

确认目录和配置文件都已经准备完毕：

ls -l /data/mongo\_27117/

ls -l  /etc/mongodb

cat  /etc/mongodb/mongo\_27117.conf

该步骤实际操作过程如下：

[root@yq-mapp-otadb248 local]# 
    [root@yq-mapp-otadb248 local]# mkdir -p /data/mongo_27117/{db,log,tmp}
    [root@yq-mapp-otadb248 local]# mkdir -p /etc/mongodb
    [root@yq-mapp-otadb248 local]# 
    [root@yq-mapp-otadb248 local]# 
    [root@yq-mapp-otadb248 local]# vim /etc/mongodb/mongo_27117.conf
    dbpath=/data/mongo_27117/db
    logpath=/data/mongo_27117/log/mongo_27117.log
    pidfilepath = /data/mongo_27117/tmp/mongo_27117.pid
    storageEngine = wiredTiger
    wiredTigerCacheSizeGB = 2
    syncdelay = 30
    wiredTigerCollectionBlockCompressor = zlib
    port=27117
    auth = true
    directoryperdb = true
    oplogSize=2048
    logappend=true
    fork=true
    #rest=true
    journal = true
    journalCommitInterval = 50
    slowms = 200
    ~
    [root@yq-mapp-otadb248 local]# 
    [root@yq-mapp-otadb248 local]# chown -R mongodb:mongodb /data/mongo_27117/
    [root@yq-mapp-otadb248 local]# chown -R mongodb:mongodb /etc/mongodb
    [root@yq-mapp-otadb248 local]# ls -l /data/mongo_27117/
    total 12
    drwxr-xr-x 2 mongodb mongodb 4096 Oct 19 12:02 db
    drwxr-xr-x 2 mongodb mongodb 4096 Oct 19 12:02 log
    drwxr-xr-x 2 mongodb mongodb 4096 Oct 19 12:02 tmp
    [root@yq-mapp-otadb248 local]# 
    [root@yq-mapp-otadb248 local]# 
    [root@yq-mapp-otadb248 local]# ls -l  /etc/mongodb
    total 4
    -rw-r--r-- 1 mongodb mongodb 392 Oct 19 12:05 mongo_27117.conf
    [root@yq-mapp-otadb248 local]# 
    [root@yq-mapp-otadb248 local]# cat  /etc/mongodb/mongo_27117.conf
    dbpath=/data/mongo_27117/db
    logpath=/data/mongo_27117/log/mongo_27117.log
    pidfilepath = /data/mongo_27117/tmp/mongo_27117.pid
    storageEngine = wiredTiger
    wiredTigerCacheSizeGB = 2
    syncdelay = 30
    wiredTigerCollectionBlockCompressor = zlib 
    port=27117
    auth = true  
    directoryperdb = true 
    oplogSize=2048
    logappend=true
    fork=true
    #rest=true
    journal = true
    journalCommitInterval = 50
    slowms = 200

**5. 启动mongodb实例，修改管理员密码**

使用下面的命令启动mongodb服务：

/usr/local/mongodb/bin/mongod --config /etc/mongodb/mongo\_27117.conf

确认密码，mongodb的管理员密码，可以根据各自的规则设置：

echo $MONGODB\_ROOT\_PASS

mongodb\_020248\_Pass

修改管理员密码，注意 mongodb 3.2要对admin授予三个角色，这点与之前的版本不同：

/usr/local/mongodb/bin/mongo --port=27117

db.createUser(\{user:'useradmin',pwd:'mongodb\_020248\_Pass',roles:\[ \{ "role" : "clusterAdmin", "db" : "admin" \}, \{ "role" : "userAdminAnyDatabase", "db" : "admin" \}, \{ "role" : "dbAdminAnyDatabase", "db" : "admin" \} \] \})

db.auth("useradmin","mongodb\_020248\_Pass")

db.system.users.find();

生成密码后,使用新用户和密码登陆mongo,确认状态：

/usr/local/mongodb/bin/mongo --port=27117 -u useradmin -p mongodb\_020248\_Pass --authenticationDatabase admin

该步骤操作过程如下；

[root@yq-mapp-otadb248 local]# 
    [root@yq-mapp-otadb248 local]# ps -ef|grep mongo
    root     32295 30115  0 12:12 pts/0    00:00:00 grep mongo
    [root@yq-mapp-otadb248 local]# 
    [root@yq-mapp-otadb248 local]# /usr/local/mongodb/bin/mongod --config /etc/mongodb/mongo_27117.conf
    about to fork child process, waiting until server is ready for connections.
    forked process: 32321
    child process started successfully, parent exiting
    [root@yq-mapp-otadb248 local]# 
    [root@yq-mapp-otadb248 local]# ps -ef|grep mongo
    root     32321     1  1 12:12 ?        00:00:00 /usr/local/mongodb/bin/mongod --config /etc/mongodb/mongo_27117.conf
    root     32359 30115  0 12:13 pts/0    00:00:00 grep mongo
    [root@yq-mapp-otadb248 local]# 
    [root@yq-mapp-otadb248 local]# 
    [root@yq-mapp-otadb248 local]# /usr/local/mongodb/bin/mongo --port=27117 
    MongoDB shell version: 3.2.5-20-g07e21d8
    connecting to: 127.0.0.1:27117/test
    Welcome to the MongoDB shell.
    For interactive help, type "help".
    For more comprehensive documentation, see
            http://docs.mongodb.org/
    Questions? Try the support group
            http://groups.google.com/group/mongodb-user
    > 
    > use admin;
    switched to db admin
    > db.system.users.find();
    Error: error: {
            "ok" : 0,
            "errmsg" : "not authorized on admin to execute command { find: \"system.users\", filter: {} }",
            "code" : 13
    }
    > 
    > db.createUser({user:'useradmin',pwd:'mongodb_020248_@JJMatch',roles:[ { "role" : "clusterAdmin", "db" : "admin" }, { "role" : "userAdminAnyDatabase", "db" : "admin" }, { "role" : "dbAdminAnyDatabase", "db" : "admin" } ] })
    Successfully added user: {
            "user" : "useradmin",
            "roles" : [
                    {
                            "role" : "clusterAdmin",
                            "db" : "admin"
                    },
                    {
                            "role" : "userAdminAnyDatabase",
                            "db" : "admin"
                    },
                    {
                            "role" : "dbAdminAnyDatabase",
                            "db" : "admin"
                    }
            ]
    }
    > 
    > db.system.users.find();
    Error: error: {
            "ok" : 0,
            "errmsg" : "not authorized on admin to execute command { find: \"system.users\", filter: {} }",
            "code" : 13
    }
    > 
    > db.auth("useradmin","mongodb_020248_@JJMatch")
    1
    > 
    > db.system.users.find();
    { "_id" : "admin.useradmin", "user" : "useradmin", "db" : "admin", "credentials" : { "SCRAM-SHA-1" : { "iterationCount" : 10000, "salt" : "6hLx/d97hS+yfoN47QTmXQ==", "storedKey" : "B0PqwVs3GFKIHQyyQ6mBp1MA370=", "serverKey" : "xK53AKKAvFCdn5rsEtij5QB9RtU=" } }, "roles" : [ { "role" : "clusterAdmin", "db" : "admin" }, { "role" : "userAdminAnyDatabase", "db" : "admin" }, { "role" : "dbAdminAnyDatabase", "db" : "admin" } ] }
    > 
    [root@yq-mapp-otadb248 local]# 
    [root@yq-mapp-otadb248 local]# /usr/local/mongodb/bin/mongo --port=27117 -u useradmin -p mongodb_020248_@JJMatch --authenticationDatabase admin
    MongoDB shell version: 3.2.5-20-g07e21d8
    connecting to: 127.0.0.1:27117/test
    Server has startup warnings: 
    2016-10-19T12:12:59.096+0800 I CONTROL  [initandlisten] 
    2016-10-19T12:12:59.096+0800 I CONTROL  [initandlisten] ** WARNING: The server was started without specifying a --bind_ip 
    2016-10-19T12:12:59.096+0800 I CONTROL  [initandlisten] **          and listens for connections on all available network interfaces.
    2016-10-19T12:12:59.097+0800 I CONTROL  [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.
    2016-10-19T12:12:59.097+0800 I CONTROL  [initandlisten] 
    2016-10-19T12:12:59.097+0800 I CONTROL  [initandlisten] 
    2016-10-19T12:12:59.097+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.
    2016-10-19T12:12:59.097+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
    2016-10-19T12:12:59.097+0800 I CONTROL  [initandlisten] 
    2016-10-19T12:12:59.097+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.
    2016-10-19T12:12:59.097+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
    2016-10-19T12:12:59.097+0800 I CONTROL  [initandlisten] 
    2016-10-19T12:12:59.097+0800 I CONTROL  [initandlisten] ** WARNING: soft rlimits too low. rlimits set to 2048 processes, 8192 files. Number of processes should be at least 4096 : 0.5 times number of files.
    2016-10-19T12:12:59.097+0800 I CONTROL  [initandlisten] 
    > 
    > use admin;
    switched to db admin
    > 
    > db.system.users.find();
    { "_id" : "admin.useradmin", "user" : "useradmin", "db" : "admin", "credentials" : { "SCRAM-SHA-1" : { "iterationCount" : 10000, "salt" : "6hLx/d97hS+yfoN47QTmXQ==", "storedKey" : "B0PqwVs3GFKIHQyyQ6mBp1MA370=", "serverKey" : "xK53AKKAvFCdn5rsEtij5QB9RtU=" } }, "roles" : [ { "role" : "clusterAdmin", "db" : "admin" }, { "role" : "userAdminAnyDatabase", "db" : "admin" }, { "role" : "dbAdminAnyDatabase", "db" : "admin" } ] }
    > 
    >

**6. 为应用创建业务账号**

创建一个 admin / admin 用户，具有可以自行创建用户和数据库的权限，密码业务自己再修改：

db.createUser(\{user:'admin',pwd:'admin',roles:\[\{role:'userAdminAnyDatabase',db:'admin'\},\{role:'dbAdminAnyDatabase',db:'admin'\}\]\})

验证业务账号登陆：

/usr/local/mongodb/bin/mongo --port=27117 -u admin -p admin --authenticationDatabase admin

该步骤，实际操作过程如下：

> 
    > db.system.users.find().pretty()
    {
            "_id" : "admin.useradmin",
            "user" : "useradmin",
            "db" : "admin",
            "credentials" : {
                    "SCRAM-SHA-1" : {
                            "iterationCount" : 10000,
                            "salt" : "6hLx/d97hS+yfoN47QTmXQ==",
                            "storedKey" : "B0PqwVs3GFKIHQyyQ6mBp1MA370=",
                            "serverKey" : "xK53AKKAvFCdn5rsEtij5QB9RtU="
                    }
            },
            "roles" : [
                    {
                            "role" : "clusterAdmin",
                            "db" : "admin"
                    },
                    {
                            "role" : "userAdminAnyDatabase",
                            "db" : "admin"
                    },
                    {
                            "role" : "dbAdminAnyDatabase",
                            "db" : "admin"
                    }
            ]
    }
    {
            "_id" : "admin.admin",
            "user" : "admin",
            "db" : "admin",
            "credentials" : {
                    "SCRAM-SHA-1" : {
                            "iterationCount" : 10000,
                            "salt" : "snlJe16a2PX3dSwxnOsfAw==",
                            "storedKey" : "VOoX1e7F0tOme6YuR+iyMLuEWK8=",
                            "serverKey" : "aSlpI7TzlyJ5Ccbd8GoptNB8khk="
                    }
            },
            "roles" : [
                    {
                            "role" : "userAdminAnyDatabase",
                            "db" : "admin"
                    },
                    {
                            "role" : "dbAdminAnyDatabase",
                            "db" : "admin"
                    }
            ]
    }
    > 
    
    > ^C
    bye
    [root@yq-mapp-otadb248 local]# 
    [root@yq-mapp-otadb248 local]# 
    [root@yq-mapp-otadb248 local]# 
    [root@yq-mapp-otadb248 local]# /usr/local/mongodb/bin/mongo --port=27117 -u admin -p admin --authenticationDatabase admin
    MongoDB shell version: 3.2.5-20-g07e21d8
    connecting to: 127.0.0.1:27117/test
    > 
    > show dbs
    admin  0.000GB
    local  0.000GB
    > 
    >

**7. 实例启动时的报警处理**

在mongodb启动过程中，有时会提示一些警告，其中常见的两类警告处理过程如下：

警告1：

提示：

2016-10-19T12:12:59.097+0800 I CONTROL  \[initandlisten\] \*\* WARNING: soft rlimits too low. rlimits set to 2048 processes, 8192 files. Number of processes should be at least 4096 : 0.5 times number of files.

参考： http://blog.csdn.net/kk185800961/article/details/45613267

处理方式，根据提示，将 processes  值，由现在的 2048，修改为4096，甚至更高的值。

ps -ef|grep mongod

cat /proc/32321/limits

cat /etc/security/limits.d/90-nproc.conf

vim /etc/security/limits.d/90-nproc.conf

该步骤实际操作过程如下：

[root@yq-mapp-otadb248 limits.d]# 
    [root@yq-mapp-otadb248 limits.d]# cat /etc/security/limits.d/90-nproc.conf 
    # 20160621 limit?? 
    #*              soft    nproc           51200
    #*              hard    nproc           51200
    
    *               soft    nproc           2048
    *               hard    nproc           16384
    
    *               soft    nofile          8192
    *               hard    nofile          8192
    
    *               soft    stack           8192
    *               hard    stack           8192
    
    *               soft    memlock         unlimited
    *               hard    memlock         unlimited
    
    [root@yq-mapp-otadb248 limits.d]# vim /etc/security/limits.d/90-nproc.conf 
    # 20160621 
    #*              soft    nproc           51200
    #*              hard    nproc           51200
    
    *               soft    nproc           8192
    *               hard    nproc           16384
    [root@yq-mapp-otadb248 ~]# 
    [root@yq-mapp-otadb248 ~]# ulimt -a
    -bash: ulimt: command not found
    [root@yq-mapp-otadb248 ~]# ulimit -a
    core file size          (blocks, -c) 0
    data seg size           (kbytes, -d) unlimited
    scheduling priority             (-e) 0
    file size               (blocks, -f) unlimited
    pending signals                 (-i) 30422
    max locked memory       (kbytes, -l) unlimited
    max memory size         (kbytes, -m) unlimited
    open files                      (-n) 8192
    pipe size            (512 bytes, -p) 8
    POSIX message queues     (bytes, -q) 819200
    real-time priority              (-r) 0
    stack size              (kbytes, -s) 8192
    cpu time               (seconds, -t) unlimited
    max user processes              (-u) 8192
    virtual memory          (kbytes, -v) unlimited
    file locks                      (-x) unlimited

警告2：

2016-10-19T12:12:59.097+0800 I CONTROL  \[initandlisten\] \*\* WARNING: /sys/kernel/mm/transparent\_hugepage/enabled is 'always'.

2016-10-19T12:12:59.097+0800 I CONTROL  \[initandlisten\] \*\*        We suggest setting it to 'never'

2016-10-19T12:12:59.097+0800 I CONTROL  \[initandlisten\]

2016-10-19T12:12:59.097+0800 I CONTROL  \[initandlisten\] \*\* WARNING: /sys/kernel/mm/transparent\_hugepage/defrag is 'always'.

2016-10-19T12:12:59.097+0800 I CONTROL  \[initandlisten\] \*\*        We suggest setting it to 'never'

确认：

cat /sys/kernel/mm/transparent\_hugepage/enabled

cat /sys/kernel/mm/transparent\_hugepage/defrag

处理：

echo "never" > /sys/kernel/mm/transparent\_hugepage/enabled

echo "never" >  /sys/kernel/mm/transparent\_hugepage/defrag

该步骤，实际操作过程如下：

[root@yq-mapp-otadb248 limits.d]# cat /sys/kernel/mm/transparent_hugepage/enabled
    [always] madvise never
    [root@yq-mapp-otadb248 limits.d]# cat /sys/kernel/mm/transparent_hugepage/defrag
    [always] madvise never
    [root@yq-mapp-otadb248 limits.d]# 
    [root@yq-mapp-otadb248 limits.d]# echo "never" > /sys/kernel/mm/transparent_hugepage/enabled
    [root@yq-mapp-otadb248 limits.d]# echo "never" >  /sys/kernel/mm/transparent_hugepage/defrag
    [root@yq-mapp-otadb248 limits.d]# 
    [root@yq-mapp-otadb248 limits.d]# cat /sys/kernel/mm/transparent_hugepage/enabled
    always madvise [never]
    [root@yq-mapp-otadb248 limits.d]#  cat /sys/kernel/mm/transparent_hugepage/defrag
    always madvise [never]
    [root@yq-mapp-otadb248 limits.d]# 
    [root@yq-mapp-otadb248 limits.d]#

**8. 创建mongodb实例服务管理脚本**

为了方便对mongodb实例的启动和停止，可以先创建mongodb的启动脚本，停止脚本，然后在 /etc/init.d/ 目录下创建一个服务脚本，这样就可以用 service 进行实例管理了。

脚本1：启动脚本：

vim /home/mongodb/scripts/mongodb\_start.sh

#!/bin/sh
    # the scripts is used to start mongodb instance with port 27117.
    # created by zhaofx on 20161019.
    
    echo -n "Starting MongoDB port 27117 ... "
    /usr/local/mongodb/bin/mongod --config /etc/mongodb/mongo_27117.conf &

脚本二：停止脚本：

vim /home/mongodb/scripts/mongodb\_stop.sh

#!/bin/bash
    # the scripts is used to stop mongodb instance with port 27117.
    # created by zhaofx on 20161019.
    
    echo -n "Stopping MongoDB port 27117"
    pid=`ps -o pid,command ax | grep mongod | awk '!/awk/ && !/grep/ {print $1}'`;
    
    if [ "${pid}" != "" ]; then
            kill -2 ${pid};
    fi

脚本三：服务脚本：

vim /etc/init.d/mongodb

vim /etc/init.d/mongodb
    
    #! /bin/sh
    # the scripts is used to mange mongodb service with linux service type.
    # created by zhaofx on 20161019.
    
    PATH=/usr/local/mongodb/bin:/sbin:/bin:/usr/sbin:/usr/bin
    NAME=mongodb
    
    start(){
    /home/mongodb/scripts/mongodb_start.sh
    }
    
    stop(){
    /home/mongodb/scripts/mongodb_stop.sh
    }
    
    
    test -x $DAEMON || exit 0
    set -e
    
    case "$1" in
            start)
                    start
                    ;;
            stop)
                    stop
                    ;;
            *)
                    N=/etc/init.d/$NAME
                    echo "Usage: $N {start|stop}" >&2
                    exit 1
                    ;;
    esac
    exit 0

修改脚本的属组，添加执行权限：

chown -R mongodb:mongodb  /home/mongodb/scripts/
    chown  mongodb:mongodb  /etc/init.d/mongodb
    chmod +x  /home/mongodb/scripts/mongodb_start.sh
    chmod +x  /home/mongodb/scripts/mongodb_stop.sh
    chmod +x  /etc/init.d/mongodb

最后服务启动和停止mongodb实例的过程为：

[root@yq-mapp-otadb248 ~]# 
    [root@yq-mapp-otadb248 ~]# service mongodb stop
    Stopping MongoDB port 27117
    [root@yq-mapp-otadb248 ~]# 
    [root@yq-mapp-otadb248 ~]# 
    [root@yq-mapp-otadb248 ~]# 
    [root@yq-mapp-otadb248 ~]# service mongodb start
    Starting MongoDB port 27117 ... [root@yq-mapp-otadb248 ~]
    about to fork child process, waiting until server is ready for connections.
    forked process: 36088
    child process started successfully, parent exiting
    
    [root@yq-mapp-otadb248 ~]#

[https_www.mongodb.org_dl_linux_x86_64]: https://www.mongodb.org/dl/linux/x86_64