PHP method to implement database containerization and shrinkage

In the modern cloud computing era, containerization technology has become an important part of the global cloud computing infrastructure. In such a big context, how to containerize the database? How to containerize the database and then perform the shrink operation? This article will introduce how PHP implements database containerization and shrinkage.

First of all, we need to understand what database containerization is. Database containerization is the process of running the database in a container. This container can be regarded as an independent virtual environment, and the virtual environment has its own CPU, memory, disk space and other resources.

Next, we need to clarify what database shrinkage is. Simply put, shrinking is to reduce the capacity of the database, that is, to reduce the disk usage of the database.

Next, let’s introduce how to use PHP to implement database containerization shrinkage:

1. Preparation

Before we start, we need to prepare a database container, for example MySQL or PostgreSQL.

2. Use PHP code to connect to MySQL

We first need to use PHP code to connect to the MySQL container. The specific code is as follows:

$host = ‘database_container’;
$user = ‘root’;
$pass = ‘password’;
$db = ‘database_name’;

$conn = mysqli_connect($host, $user, $pass, $db);

if(!$conn){
die(“Could not connect: ” . mysqli_error());
}
echo ‘Connected successfully’;

The above code will connect to the MySQL container.

3. Use PHP code to reduce the disk usage of the container

We can reduce the disk usage of the MySQL container through MySQL's built-in commands. First, we need to execute the following MySQL command through PHP code:

DELETE FROM table_name WHERE id < 100;

The above command will delete all records with an ID less than 100 in the table. This is how you reduce disk usage.

4. Use PHP code to close the MySQL connection and container

After deleting the data, we need to use PHP code to close the MySQL connection and container. The specific code is as follows:

mysqli_close($conn);

exec(“docker stop database_container”);

The above code will close the MySQL connection and stop the MySQL container.

Summary

In this article, we introduced how to use PHP to implement database containerization shrinkage. Through this article, readers can understand the definition of database containerization and shrinkage and how to use PHP code to connect to MySQL containers, reduce container disk usage, and close MySQL connections and containers.

In practical applications, we need to combine the methods introduced in this article with other technologies to meet actual needs. At the same time, we also need to pay attention to database backup and security issues to ensure the reliability and security of the database container.

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