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MySQL data persistence hosted on two separate EC2 intances using Elastic Block Storage (EBS)

This guide will help you set up a MySQL container using Docker Compose on an EC2 instance with an EBS volume and db data persistence.

Prerequisites

  1. Sign in to the AWS Management Console and open the Amazon EC2 console at https://console.aws.amazon.com/ec2/.
  2. Launch two EC2 instances named Instance-1 and Instance-2.
  3. In the navigation pane, choose Volumes under Elastic Block Store.
  4. Click Create Volume.
    • Choose the type of volume you want to create. General purpose SSD (gp2 or gp3) is a good default choice for many workloads.
    • Set the size of the volume.
    • For Availability Zone, choose the same zone as your EC2 instance. This is important because volumes can only be attached to instances in the same zone.
    • Click Create.
  5. After the volume is created, select it, click on the Actions button, and then choose Attach Volume.
  6. In the Attach Volume dialog box:
    • For Instance, start typing the name or ID of the instance, and then select Instance-1 from the list.
    • For Device, enter a device name. The name will depend on your instance type and the OS. For example, /dev/sdf (for instances launched using a classic block device mapping) or /dev/nvme1n1 (for Nitro-based instances).
    • Click Attach.

Instructions

Setting Up on the First EC2 Instance

  • SSH into the first EC2 instance and run below command: 
    sudo apt update
sudo apt install docker.io docker-compose -y
  • Clone docker compose file and create a directory data 
    git clone https://github.com/linckon/mysql-db-data-persistence.git
cd mysql-db-data-persistence
mkdir data
  • Check if the disk is visible using: 
     sudo lsblk
  • Identify the new disk. It might be listed as nvme1n1, xvdf, or something similar, depending on your instance type and how many disks are attached: 
     sudo file -s /dev/xvdf
  • Format the disk (assuming it's a new volume and you're not trying to preserve any data on it). For example, to format it with the ext4 filesystem: 
    sudo mkfs -t xfs /dev/xvdf
  • Mount the EBS volume to a directory, for example /data: 
    sudo mount /dev/xvdf /home/ubuntu/mysql-db-data-persistence/data
  • Navigate to the directory containing the docker-compose.yml file.
  • Run the Docker Compose command: 
    docker-compose up -d
  • Login to mysql inside docker container and create a table called person inside database db and insert some sample data 
    CREATE TABLE person (
 id INT AUTO_INCREMENT PRIMARY KEY,
 name VARCHAR(255) NOT NULL,
 age INT
);


INSERT INTO person (name, age) VALUES
('John Doe', 30),
('Jane Smith', 25),
('Bob Johnson', 40),
('Alice Brown', 35),
('Eva Davis', 28);



mysql> select * from person;
+----+-------------+------+
| id | name        | age  |
+----+-------------+------+
|  1 | John Doe    |   30 |
|  2 | Jane Smith  |   25 |
|  3 | Bob Johnson |   40 |
|  4 | Alice Brown |   35 |
|  5 | Eva Davis   |   28 |
+----+-------------+------+
5 rows in set (0.00 sec)

Now mysql data persist into additional disk ,if the instance is corrupted we can simply detach the disk and attach it will another instance.

  • Detach the EBS volume from this instance and attach it to the second EC2 instance .

Setting Up on the Second EC2 Instance

  • SSH into the second EC2 instance and run below command:

    sudo apt update
sudo apt install docker.io docker-compose -y

  • Clone docker compose file and create a directory data

    git clone https://github.com/linckon/mysql-db-data-persistence.git
cd mysql-db-data-persistence
mkdir data

  • Mount the EBS volume:

    sudo mount /dev/xvdf /home/ubuntu/mysql-db-data-persistence/data

  • Navigate to the directory containing the docker-compose.yml file.

  • Run the Docker Compose command:

    docker-compose up -d

  • login to mysql inside docker container and run:

    select * from person;

 mysql> select * from person;
 +----+-------------+------+
 | id | name        | age  |
 +----+-------------+------+
 |  1 | John Doe    |   30 |
 |  2 | Jane Smith  |   25 |
 |  3 | Bob Johnson |   40 |
 |  4 | Alice Brown |   35 |
 |  5 | Eva Davis   |   28 |
 +----+-------------+------+
 5 rows in set (0.00 sec)

See all data should remain same as Instance-1. For detail demostration visit below link:

https://iamlinckon.hashnode.dev/mysql-data-persistence-hosted-on-two-separate-ec2-intances-using-elastic-block-storage-ebs