CentOS 6 上mongodb安装与使用

# 创建 /etc/yum.repos.d/mongodb-enterprise.repo
[mongodb-enterprise]
name=MongoDB Enterprise Repository
baseurl=https://repo.mongodb.com/yum/redhat/$releasever/mongodb-enterprise/3.4/$basearch/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-3.4.asc

sudo yum install -y mongodb-enterprise

sudo service mongod start

sudo chkconfig mongod on 

sudo yum erase $(rpm -qa | grep mongodb-enterprise) # 卸载

#配置包管理系统

创建 /etc/yum.repos.d/mongodb-org-3.6.repo 

[mongodb-org-3.6]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.6/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-3.6.asc

sudo yum install -y mongodb-org
#
sudo yum install -y mongodb-org-3.6.3 mongodb-org-server-3.6.3 mongodb-org-shell-3.6.3 mongodb-org-mongos-3.6.3 mongodb-org-tools-3.6.3

sudo service mongod start
sudo chkconfig mongod on
sudo service mongod stop

mongo --host 127.0.0.1:27017

sudo service mongod stop
sudo yum erase $(rpm -qa | grep mongodb-org)
sudo rm -r /var/log/mongodb
sudo rm -r /var/lib/mongo

mongo --port 27017

help # 查看帮助

use admin # 切换到管理员

db.createUser(
  {
    user: "Aniumongodb",
    pwd: "Aniumongodb123.",
    roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]
  }
)
# 
[root@mongodb ~]# mongo --port 27017
MongoDB shell version v3.6.3
connecting to: mongodb://127.0.0.1:27017/
MongoDB server version: 3.6.3
Server has startup warnings: 
2018-04-02T17:12:06.214+0800 I STORAGE  [initandlisten] 
2018-04-02T17:12:06.214+0800 I STORAGE  [initandlisten] ** WARNING: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine
2018-04-02T17:12:06.214+0800 I STORAGE  [initandlisten] **          See http://dochub.mongodb.org/core/prodnotes-filesystem
2018-04-02T17:12:07.413+0800 I CONTROL  [initandlisten] 
2018-04-02T17:12:07.413+0800 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.
2018-04-02T17:12:07.413+0800 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.
2018-04-02T17:12:07.414+0800 I CONTROL  [initandlisten] 
MongoDB Enterprise > use admin
switched to db admin
MongoDB Enterprise > db.createUser(
...   {
...     user: "Aniumongodb",
...     pwd: "Aniumongodb123.",
...     roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]
...   }
... )
Successfully added user: {
        "user" : "Aniumongodb",
        "roles" : [
                {
                        "role" : "userAdminAnyDatabase",
                        "db" : "admin"
                }
        ]
}
MongoDB Enterprise > exit
bye

Built-In Roles（内置角色）：
    1. 数据库用户角色：read、readWrite;
    2. 数据库管理角色：dbAdmin、dbOwner、userAdmin；
    3. 集群管理角色：clusterAdmin、clusterManager、clusterMonitor、hostManager；
    4. 备份恢复角色：backup、restore；
    5. 所有数据库角色：readAnyDatabase、readWriteAnyDatabase、userAdminAnyDatabase、dbAdminAnyDatabase
    6. 超级用户角色：root  
    // 这里还有几个角色间接或直接提供了系统超级用户的访问（dbOwner 、userAdmin、userAdminAnyDatabase）
    7. 内部角色：__system

# 用户角色权限
Read：允许用户读取指定数据库
readWrite：允许用户读写指定数据库
dbAdmin：允许用户在指定数据库中执行管理函数，如索引创建、删除，查看统计或访问system.profile
userAdmin：允许用户向system.users集合写入，可以找指定数据库里创建、删除和管理用户
clusterAdmin：只在admin数据库中可用，赋予用户所有分片和复制集相关函数的管理权限。
readAnyDatabase：只在admin数据库中可用，赋予用户所有数据库的读权限
readWriteAnyDatabase：只在admin数据库中可用，赋予用户所有数据库的读写权限
userAdminAnyDatabase：只在admin数据库中可用，赋予用户所有数据库的userAdmin权限
dbAdminAnyDatabase：只在admin数据库中可用，赋予用户所有数据库的dbAdmin权限。
root：只在admin数据库中可用。超级账号，超级权限    

db.createUser(
...  {
...    user: "Aniudba",
...    pwd: "Aniudba123.",
...    roles: [
...       { role: "root", db: "admin" }
...    ]
...  }
... )
Successfully added user: {
        "user" : "Aniudba",
        "roles" : [
                {
                        "role" : "root",
                        "db" : "admin"
                }
        ]
}

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

*          soft    nproc     16392 # 1024改为16392
root       soft    nproc     unlimited

重启MongoDB服务  /etc/init.d/mongod restart