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Editor to share with you how mongodb quickly build their own database, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Mongoddb installation

Install locally

Download the corresponding compressed package mongodb directly through the official website.

Install on CVM (centos system)

Wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-amazon-3.4.9.tgztar zxvf mongodb-linux-x86_64-3.2.6.tgzmv mongodb-linux-x86_64-3.2.6.tgz mongodbcd mongodb

Please download the corresponding version according to your system.

Environment configuration & start the server

Create a folder under the file directory to store the data. The general directory is / usr/local/mongodb/data/db/. Start mongodb by running the command.

. / bin/mongod-dbpath=/usr/local/mongodb/data/db/-rest

Here are a few parameters to highlight, mongod for your mongodb command line support can be started, if necessary, you can edit / etc/profile edit into the global environment, dbpath is the data path, corresponding to your established data directory. Rest is a graphic support.

The default path of mongodb is / / localhost:27017. If you access this address successfully, you will be prompted for success and add the parameter rest to access / / localhost:28017.

. / bin/mongo can open shell

Common commands:

# query all databases show dbs;# to delete the currently used database db.dropDatabase (); # Clone host data db.cloneDatabase ("127.0.0.1"); # repair the current database db.repairDatabase (); # View the current database db.getName (); # display the current db status db.stats (); # View the linked machine address of the current db ()

Deploy mongodb environment on CVM

Now the cloud is very popular, and many people choose to use the cloud server to deploy their own projects. Here is an introduction to the cloud mongodb configuration.

. / bin/mongod-fork-dbpath=/usr/local/mongodb/data/db/-logpath=/usr/local/mongodb/data/log/error.log-logappend-rest

When the database is deployed to the CVM, it needs to be run in the background. The forever plug-in of centos was used at the beginning, and it was found that the database could not be run in the background. After consulting the information, it is found that the official command-- fork starts the backend service-- logpath-- logappend parameter adds a log log to the backend service. The rest effect is the same as above.

Make the database more intuitive

Isn't the dense data ugly? It's hard? At this time, we need a plug-in to beautify the database.

There are many online such as mongovue, adminmongo can search the living Github to look it up.

The following is the database encryption. It was only after I was attacked that I updated the encryption process.

Add Super Admin

First, run your database and perform the shell operation after success.

> use admin > db.createUser ({user: "your name", pwd: "your pwd", roles: [{role: "root", db: "admin"}]}) Successfully added user: {"user": "admin", "roles": [{"role": "root", "db": "admin"}]}

Root stands for super permissions, so an account with super privileges is created. You can view the user with the following command.

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Db.getUsers ()

MongoDB database role

Role refers to the role that manages the permissions to control the database. The first user, preferably root, can perform any operation.

Initialize the user who is best to create root permissions. When auth mode is enabled, permission is required to perform any operation. Do not start the background running mode directly with auth, otherwise you will not have the permission to shut down the database.

Read: allows the user to read the specified database

ReadWrite: allows users to read and write to a specified database

DbAdmin: allows users to perform administrative functions in a specified database, such as index creation, deletion, viewing statistics, or accessing system.profile

UserAdmin: allows users to write to the system.users collection. You can create, delete and manage users in a specified database.

ClusterAdmin: available only in the admin database, giving users administrative rights to all shard and replication set related functions.

ReadAnyDatabase: available only in admin databases, giving users read access to all databases

ReadWriteAnyDatabase: available only in admin databases, giving users read and write permissions to all databases

UserAdminAnyDatabase: available only in admin databases, giving users userAdmin permissions for all databases

DbAdminAnyDatabase: available only in admin databases, giving users dbAdmin permissions for all databases.

Root: available only in the admin database. Super account, super privilege

Start auth mode

Only after you have created the Super Admin can you really start the encrypted database, otherwise you don't have the right to operate the database yourself.

/ / the normal mode database needs to be closed in shell. Enter the following command > use admin > db.shutdownServer () / / the terminal starts the encrypted database-- auth$. / bin/mongod-- fork-- dbpath=/root/mongodb/db/-- logpath=/root/mongodb/log/error.log-logappend-- auth// runs the database through the command, and adds the suffix-- auth to your running command. This starts the encrypted database. Perform database operation > show dbs2017-09-23T14:09:58.922+0800 E QUERY [thread1] Error: listDatabases failed: {"ok": 0, "errmsg": "not authorized on admin to execute command {listDatabases: 1.0}", "code": 13 "codeName": "Unauthorized"}: _ getErrorWithCode@src/mongo/shell/utils.js:25:13Mongo.prototype.getDBs@src/mongo/shell/mongo.js:62:1shellHelper.show@src/mongo/shell/utils.js:769:19shellHelper@src/mongo/shell/utils.js:659:15@ (shellhelp2): 1Rank / error found Need authentication information > db.auth ('your name','your pwd') successfully return 1 failed return 0 input before the super account, OK, simple encryption is completed.

Encryption is successful. Authentication is required to operate the database.

Link encrypted database

After the database is encrypted, our server code should be changed accordingly.

Xxx.db ('mongodb://your name: your pwd@localhost:27017/db?authSource=admin')

Xxx means the plug-ins you use, such as mongoose, mongoskin and so on.

The above is how mongodb quickly set up all the contents of its own database, thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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