How to implement database containerized backup with PHP

In today's cloud era, containerization technology is receiving more and more attention in software development, deployment and operation and maintenance. The use of containerization technology can not only help us better manage applications, but also simplify operation and maintenance work such as database backup. This article will discuss the method of implementing database containerized backup in PHP.

1. What is database containerized backup?

Traditional database backup relies on the operating system and hardware, while containerized backup packages data and containers together, and backs up the entire application and data based on the container. Doing so avoids hardware and operating system limitations and also facilitates the continued operation of the program.

2. How does PHP implement database containerized backup?

There are many ways to implement database containerized backup in PHP. Here we mainly introduce a Docker-based backup solution:

1. Docker installation and use

First, we need to install Docker. You can download the corresponding version of Docker CE (Community Edition) from the official website for installation. After the installation is successful, you can enter the docker version command in the terminal to view the version information and status of Docker.

Next, we need to use the Docker command to initialize the local image warehouse and map the database that needs to be backed up into the container.

2. Create MySQL container

First, we need to create a MySQL container for backup.

Run the following command:

docker run --name mysql -e MYSQL_ROOT_PASSWORD=123456 -d -p 3306:3306 mysql:5.7

The above command will automatically download the MySQL5.7 version image and start the MySQL service in the container. Among them, the --name parameter is used to name the container, the -e parameter is used to set the root password of MySQL, the -d parameter indicates starting the container in daemon mode, and the -p parameter indicates mapping MySQL's 3306 port to the host's 3306 port. , which facilitates later use of the MySQL client for connection.

3. Create a backup container

Create a backup container in the MySQL container:

docker run --rm --link mysql:mysql -v /home/mysql_backup:/backup mayswind/mysql-backup

After executing the above command, it will be in the local /home/mysql_backup A backup file is generated in the directory.

Among them, the --rm parameter indicates that the container will be automatically deleted after exiting, the --link parameter is used to link the previously created MySQL container, and the -v parameter indicates that the backup file will be stored in the /home/mysql_backup directory on the host. middle.

It is worth noting that mayswind/mysql-backup is an image of a backup container that can be downloaded on Docker Hub. This container provides the function of automatic backup of the MySQL container, which is more convenient and practical.

4. Scheduled backup

In containerized backup, scheduled backup is also a very important link. We can set up scheduled backup through the crontab command, for example:

0 3 * * * /bin/bash /home/mysql_backup/mysql_backup.sh

The above command means that the script /home/mysql_backup/mysql_backup.sh is executed once every day at three o'clock in the morning to automatically back up MySQL data.

The content of the mysql_backup.sh script is as follows:

#!/bin/bash
OUTFILE="/backup/mysql_backup_$(date +%Y-%m-%d_%H-%M-%S).sql"
docker run --rm --link mysql:mysql -v /home/mysql_backup:/backup mayswind/mysql-backup backup --output-file=$OUTFILE --single-transaction

5. Restore backup

When you need to restore the backup, you can proceed through the following steps:

a. Copy the backup file to the MySQL container, for example:

docker cp 2019-11-25_11-15-34.sql mysql:/backup/

b. Execute the following command in the MySQL container:

mysql -uroot -p123456 < /backup/2019-11-25_11-15-34.sql

This command will restore the backup file to MySQL middle.

3. Summary

Through containerized backup, we can package applications and data together to achieve more convenient backup and recovery operations. In PHP, we can use the Docker tool to implement containerized backup. The specific method is relatively simple and easy to implement. I believe this article can be of certain reference value to readers who are looking for PHP to implement database containerized backup.

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