Mongodb Read and Write Access to Data and Configuration Is Unrestricted.
MongoDB
Connecting to MongoDB databases
Introduction
Once y'all take a MongoDB server available, one of the first and most common actions you'll need to take is to connect to the actual database. This requires coordination to make sure that the database is configured in a fashion that allows your client to connect and authenticate.
This means that you'll need to understand how to connect to your MongoDB database by providing the server location, connectedness parameters, and the correct credentials. In this guide, we'll focus on how to connect to the database from the client side using the mongo MongoDB beat out client, designed mainly for interactive sessions with your databases.
In a companion guide, you can detect out how to configure MongoDB's authentication settings to match your requirements. Consider reading both pieces for a complete moving-picture show of how authentication is implemented from the perspective of both parties.
RELATED ON PRISMA.IO
If you are using Prisma Customer with MongoDB, y'all can use the MongoDB connector (currently in preview) to connect and manage your data.
Prisma is an open-source database toolkit for Typescript and Node.js that aims to make app developers more productive and confident when working with databases.
Basic information nigh the mongo client
The mongo customer is a command line JavaScript client for connecting to, decision-making, and interacting with MongoDB database servers. In many ways, it is the simplest way to connect to and start using your MongoDB database considering information technology is included in the MongoDB installation and available on all popular platforms. The mongo client is especially useful for performing initial configuration and for interactive sessions where you want to explore your data or iterate on queries based on preliminary results.
The way that you connect with the mongo shell depends on the configuration of the MongoDB server and the options available for y'all to authenticate to an account. In the following sections, we'll go over some of the basic connectedness options. For clarity'due south sake, we'll differentiate between local and remote connections:
- local connection: a connection where the client and the MongoDB instance are located on the same server
- remote connection: where the customer is connecting to a network-attainable MongoDB example running on a different estimator
Allow's showtime with connecting to a database from the same computer.
Connecting to a local database with mongo
Without whatsoever arguments, the mongo command attempts to connect to a local MongoDB instance.
To exercise this, it attempts to connect to port 27017 on the local loopback address: 127.0.0.1:27017. This is i of the interfaces that MongoDB servers demark to in their default configuration (MongoDB may besides be attainable through a local socket file).
Y'all tin connect to a local MongoDB server running with its default configuration by typing:
On a successful connectedness, you will probable see a fairly long set of letters followed by a MongoDB trounce prompt:
MongoDB shell version v4.4.6
connecting to: mongodb://127.0.0.one:27017/?compressors=disabled&gssapiServiceName=mongodb
Implicit session: session { "id" : UUID("9cf2d126-d25f-4ed8-b159-ef3bba4fcc53") }
MongoDB server version: four.4.6
---
The server generated these startup warnings when booting:
2021-06-04T12:26:53.374+00:00: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine. Meet http://dochub.mongodb.org/core/prodnotes-filesystem
2021-06-04T12:26:54.562+00:00: Access control is not enabled for the database. Read and write admission to data and configuration is unrestricted
---
---
Enable MongoDB'southward free deject-based monitoring service, which will and then receive and display
metrics well-nigh your deployment (disk utilization, CPU, performance statistics, etc).
The monitoring data will be available on a MongoDB website with a unique URL accessible to you
and anyone you share the URL with. MongoDB may use this information to make product
improvements and to suggest MongoDB products and deployment options to you.
To enable free monitoring, run the following command: db.enableFreeMonitoring()
To permanently disable this reminder, run the post-obit control: db.disableFreeMonitoring()
---
>
The output shows logs generated by the mongo command while establishing the connection, followed by some warnings generated past the MongoDB server on startup. Finally, there is a notice about a MongoDB monitoring service that you may choose to take advantage of or disable.
One of the warnings from the MongoDB server indicates that access control is not enabled currently. This is the reason we were able to connect without providing credentials or other hallmark details.
If you are connecting to a local MongoDB server that has been configured with access control, you will need to provide boosted information to connect. You will demand to provide at least a username and password to connect using the associated --username and --password options:
mongo --username < mongo_username > --password
Placing the --countersign option at the end and not providing the password inline indicates that you want MongoDB to prompt for a countersign instead. This is more secure than providing a countersign in the command itself every bit that may exist visible or recoverable through beat out history, process lists, and other mechanisms.
The MongoDB server will prompt y'all for the user'southward password before connecting to the database:
MongoDB shell version v.four.4.6
Enter password:
Upon successfully authenticating, you should be connected to the database and able to continue your session as normal.
Y'all can also provide this information by passing a connection string instead of using the --username and --password options:
mongo "mongodb://<mongo_username>:@127.0.0.1"
Since nosotros've indicated that the user has a countersign with the <username>: syntax, just haven't provided one, the mongo beat will prompt for the password.
Alternatively, you tin can as well authenticate after connecting with the normal mongo command past using the db.auth command.
Outset, connect to the MongoDB database without providing credentials:
You lot will exist given a command prompt like usual, but if access control is enabled, you won't have permission perform many deportment until you authenticate. For instance, the prove dbs command volition likely exist empty since you don't have access to query the bachelor databases:
To authenticate, kickoff, select the database that your user is defined in. Nigh frequently, that will be the admin database:
Afterwards, utilize db.auth() to provide your username and asking a password prompt:
db.auth({user: "<mongo_username>", passwordPrompt()})
You will be prompted for the user account'southward countersign as earlier:
If you are successful, the server will output one:
Yous will now accept the regular access of the user you authenticated as:
admin 0.000GB
config 0.000GB
local 0.000GB
You can view the list authenticated users and roles associated with the current connexion at any time by typing:
db.runCommand("connectionStatus")
{
"authInfo" : {
"authenticatedUsers" : [
{
"user" : "root",
"db" : "admin"
}
],
"authenticatedUserRoles" : [
{
"role" : "userAdminAnyDatabase",
"db" : "admin"
},
{
"role" : "readWriteAnyDatabase",
"db" : "admin"
}
]
},
"ok" : 1
}
Connecting to a remote database
If y'all want to connect to a remote MongoDB database, you'll have to provide some additional details when using the mongo shell.
Specifically, you lot'll need to include the --host option and potentially the --port option as well if the MongoDB server is listening on a non-default port. In near all cases, yous'll also need to provide the --user and --password options to authenticate to the remote server too.
The basic structure of the command when connecting to a remote MongoDB database therefore looks something similar this:
mongo --host < mongo_server_address > --port < mongo_server_port > --user < mongo_username > --password
Every bit mentioned in the section on connecting to a local database, placing the --password choice at the end and not providing the countersign inline indicates that you want the mongo beat to prompt for a password instead. This is more secure than providing a password in the control itself as that may be visible or recoverable through beat out history, process lists, and other mechanisms.
The MongoDB server will prompt yous for the user's countersign before connecting to the database:
MongoDB shell version five.iv.4.6
Enter countersign:
Upon successfully authenticating, yous should be connected to the database and able to go along your session equally normal.
Y'all can also provide this information past passing a connection string instead of using the --host, --port, --username and --countersign options:
mongo "mongodb://<mongo_username>:@<mongo_server_address>:<mongo_server_port>"
Since we've indicated that the user has a countersign with the <username>: syntax, merely oasis't provided ane, the mongo shell will prompt for the password.
Adjusting a MongoDB server's authentication configuration
If you lot desire to change the rules that dictate how users can authenticate to your MongoDB instances, yous can do so by modifying your server's configuration. You can discover out how to alter MongoDB's authentication configuration in this article.
Conclusion
In this guide, we covered MongoDB authentication from the customer side. We demonstrated how to use the mongo shell to connect to both local and remote database instances using a variety of methods.
Knowing how to connect to various MongoDB instances is vital as you start to piece of work the database system. You may run a local MongoDB example for evolution that doesn't demand any special authentication, simply your databases in staging and production will about certainly crave authentication. Being able to authenticate in either case volition allow yous to work well in different environments.
RELATED ON PRISMA.IO
If y'all are using Prisma Client with MongoDB, you can use the MongoDB connector (currently in preview) to connect and manage your data.
Prisma is an open-source database toolkit for Typescript and Node.js that aims to make app developers more than productive and confident when working with databases.
FAQ
Whether connecting to MongoDB locally or remotely, a connection failure will result in an error bulletin from MongoDB. The near common sources of a connection fault are an incorrect username or password, attempting to connect with a non-whitelisted IP address, or potentially besides many connections to the database.
Y'all can read more than about connecting to MongoDB database to ensure you accept all of the necessary pieces.
To connect to a remote MongoDB database, you accept to include additional details when using the mongo shell similar --host and potentially --port.
The basic structure of the command will look something like:
mongo --host <mongo_server_address> --port <mongo_server_port> --user <mongo_username> --password
Your MongoDB database besides volition demand to be configured to accept remote connections either in the configuration file or the Atlas IP whitelist.
Assuming the admin user has already been created using these steps, y'all tin can employ something similar to the post-obit syntax:
utilise admin
db.auth('admin','password');
The mongo client is a command line JavaScript customer for connecting to, controlling, and interacting with MongoDB database servers.
The style you connect and utilize the mongo beat out volition depend on your configuration, only you tin can generally begin by using the command line by typing mongo into the shell.
MongoDB too has the --help addition from the command line if needed.
Aye, you can connect to MongoDB with Coffee. The first pace in the procedure volition crave installing the Java driver.
About the Author(due south)
Justin Ellingwood
Justin has been writing about databases, Linux, infrastructure, and developer tools since 2013. He currently lives in Berlin with his wife and 2 rabbits. He doesn't usually have to write in the third person, which is a relief for all parties involved.
martinezprien1990.blogspot.com
Source: https://www.prisma.io/dataguide/mongodb/connecting-to-mongodb
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