MySQL - Se connecter avec CLI (EN)

Last updated 8th March 2022

Objective

Public Cloud Databases allow you to focus on building and deploying cloud applications while OVHcloud takes care of the database infrastructure and maintenance in operational conditions.

This guide explains how to connect to a MySQL database instance with a Command Line Interface (CLI).

Requirements

• Access to the OVHcloud Control Panel
• A Public Cloud project in your OVHcloud account
• A MySQL database running on your OVHcloud Public Cloud Databases (this guide can help you to meet this requirement)
• Configure your MySQL instance to accept incoming connections

Concept

To interact correctly with the MySQL instance, we need to first install something called a MySQL client, in order to connect and control the MySQL service remotely. It's a Client-Server interaction.

Instructions

Installing the MySQL client

You first need to install a software to interact with your MySQL instance remotely. This official software can be installed on various client machines such as your own computer, a VPS or a virtual machine. The only rule is to be able to reach the public network (Internet) and have sufficient rights to install it.

In order to do so and depending on your configuration, you may need to follow official MySQL documentation to install MySQL Shell (mysqlsh), more powerful compared to MySQL Client (mysql).

MySQL Shell is not mandatory but much more convenient to use compared to standard MySQL Clients, since you can connect with Service URI instead of individual parameters.

Follow the steps here after selecting Windows, MacOS or Linux as operating system: https://dev.mysql.com/doc/mysql-shell/8.0/en/mysql-shell-install.html

We are now ready to learn how to connect to our MySQL instance.

Configuration

We will now follow official MySQL documentation to perform our first connection.

In your CLI, type mysqlsh --version. The result should look like this:

laptop$mysqlsh --version
/snap/mysql-shell/29/bin/mysqlsh   Ver 8.0.23 for Linux on x86_64 - for MySQL 8.0.23 (Source distribution)

It means that mysqlsh is correctly installed and working properly. If you do not see something like this result, please go back to the previous step and reinstall MySQL shell.

Connect to your MySQL instance

We will follow official MySQL documentation: https://dev.mysql.com/doc/refman/8.0/en/connecting-using-uri-or-key-value-pairs.html.

To perform a connection, simply type mysqlsh --sql followed by the Service URI:

laptop$mysqlsh --sql "mysql://<username>:<password@<hostname>t<port>/defaultdb?ssl-mode=REQUIRED"

Don't forget you need to modify the username, password, hostname and port. In our example, it will look like this:

laptop$mysqlsh --sql "mysql://avnadmin:Mysup3rs3cur3p4ssw0rd@mysql-ab123456-cd7891011.database.cloud.ovh.net:20184/defaultdb?ssl-mode=REQUIRED"

Once connected correctly, you should see something similar to:

MySQL Shell 8.0.23

Copyright (c) 2016, 2021, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its affiliates.
Other names may be trademarks of their respective owners.

Type '\help' or '\?' for help; '\quit' to exit.
WARNING: Using a password on the command line interface can be insecure.
Creating a Classic session to '.(removed)..:20184/defaultdb?ssl-mode=REQUIRED'
Fetching schema names for autocompletion... Press ^C to stop.
Fetching table and column names from `defaultdb` for auto-completion... Press ^C to stop.
Your MySQL connection id is 50811
Server version: 8.0.26 Source distribution
Default schema set to `defaultdb`.
mysql-sql [defaultdb]>

Congratulations! You are now fully able to interact with your MySQL instance!

MySQL client usage

Once connected, you can manage your MySQL instance with built-in MySQL client methods.

Please follow the official MySQL documentation.

To verify:

• SHOW DATABASES; will list all the databases;
• select * from mysql.user; will display information about existing users.

In our example, it will look like this:

mysql-sql [defaultdb]> SHOW DATABASES;
+--------------------+
| Database           |
+--------------------+
| defaultdb          |
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
5 rows in set (0.0046 sec)

defaultdb=> \h CREATE DATABASE
Command:     CREATE DATABASE
Description: create a new database
Syntax:
CREATE DATABASE name
    [ [ WITH ] [ OWNER [=] user_name ]
           [ TEMPLATE [=] template ]
           [ ENCODING [=] encoding ]
           [ LOCALE [=] locale ]
           [ LC_COLLATE [=] lc_collate ]
           [ LC_CTYPE [=] lc_ctype ]
           [ TABLESPACE [=] tablespace_name ]
           [ ALLOW_CONNECTIONS [=] allowconn ]
           [ CONNECTION LIMIT [=] connlimit ]
           [ IS_TEMPLATE [=] istemplate ] ]

URL: https://www.mysql.org/docs/13/sql-createdatabase.html

Go further

MySQL capabilities

Getting started with Public Cloud Databases

Visit the Github examples repository to find how to connect to your database with several languages.

We want your feedback!

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