1. Stop the MySQL Docker container:
$ docker stop <container_name_or_id>
2. Remove the existing MySQL container:
$ docker rm <container_name_or_id>
This step is necessary because you cannot modify the root password directly in the existing container.
3. Create a new MySQL container with a mounted volume:
$ docker run -d \
- name mysql-container \
-e MYSQL_ROOT_PASSWORD=temporary_password \
-v /path/on/host:/var/lib/mysql \
mysql:latest
Replace /path/on/host with the path on your host machine where you want to store the MySQL data files.
This step creates a new MySQL container with a temporary password for the root user.
4. Access the MySQL container:
$ docker exec -it mysql-container mysql -uroot -p
You will be prompted to enter the temporary password. Use the one you specified in the MYSQL_ROOT_PASSWORD environment variable.
5. Change the root password:
$ ALTER USER 'root'@'localhost' IDENTIFIED BY 'new_password';
Replace ‘new_password’ with your desired new password.
6. Exit the MySQL prompt:
$ exit;
7. Stop the MySQL container:
$ docker stop mysql-container
8. Remove the MySQL container:
$ docker rm mysql-container
9. Start a new MySQL container without the mounted volume:
$ docker run -d \
- name mysql-container \
-e MYSQL_ROOT_PASSWORD=new_password \
mysql:latest
This time, use the new password in the MYSQL_ROOT_PASSWORD environment variable.
Now you have successfully reset the root password for MySQL in a Docker container. The key steps involve creating a new container, accessing it, changing the password, and then starting a fresh container with the updated password. Using a mounted volume ensures that your MySQL data persists across container recreations.
