In this blog we are going to demonstrate how to replicate a MariaDB database that runs in a Docker container.
Automatically deploy environment by;
Running the deploy_config.sh after cloning this Repo
nabangi
/
MariaDB-in-Docker
SQL Database cluster deployment with Replication monitoring in Docker
MariaDB-in-Docker
mariadb container master-slave replication with health Monitoring
Automatically deploy environment by;
Running the deploy_config.sh after clonning the Repo to you Server.
Environment prep and manually deploy
sudo apt update
Installing the Docker engine incase its not installed yet
sudo apt-get remove docker docker-engine docker.io
sudo apt install docker.io
sudo systemctl start docker
sudo systemctl enable docker
logout then login again to enable user rights incase they don't apply immediately
sudo groupadd docker
sudo gpasswd -a "${USER}" docker
usermod -aG docker "${USER}"
Create the database persistent volume to be mounted
mkdir -p /opt/mariadb/master-data
Grant Permissions
sudo chown -R 1001:1001 /opt/mariadb/master-data/
Running containers in dettached mode but when you remove the "-d" it could help with debugging the running configs in the container!
docker run -d or docker-compose up -d
To login to a container
docker exec -it $container_id bash
mariadb
$ mysql -u my_user -p
#my_password
after login check databases
Environment prep and manually deploy
sudo apt update
Installing the Docker engine incase its not installed yet
sudo apt-get remove docker docker-engine docker.io
sudo apt install docker.io
sudo systemctl start docker
sudo systemctl enable docker
logout then login again to enable user rights incase they don't apply immediately
sudo groupadd docker
sudo gpasswd -a "${USER}" docker
usermod -aG docker "${USER}"
Create the database persistent volume to be mounted
mkdir -p /opt/mariadb/master-data
Grant Permissions
sudo chown -R 1001:1001 /opt/mariadb/master-data/
Running containers in dettached mode but when you remove the "-d" it could help with debugging the running configs in the container!
docker run -d or docker-compose up -d
To login to a container
docker exec -it $container_id bash
Mariadb
$ mysql -u my_user -p
#my_password
after login check databases
show databases;
use my_databse;
then create table form there
exit;
check or configure replication
login with root
$ mysql -u root -p
#master_root_password
then
show master status;
To import:
docker exec -i adprcc3ms_mariadb-master_1 mysql -uroot -pmaster_root_password my_database < mariadb-master-dump.sql
To export:
docker exec -i adprcc3ms_mariadb-master_1 mysqldump -uroot -pmaster_root_password my_database > mariadb-master-dump.sql
Stop and backup the currently running container, Uncomment the following lines
docker stop $container_id
rsync -a /opt/mariadb/master-data /opt/mariadb/master-data.bkp.$(date +%Y%m%d-%H.%M.%S)
incase you want to scale up number of slaves or scale down
docker-compose up --detach --scale mariadb-master=1 --scale mariadb-slave=3
To clean up
docker stop $container_id
docker rm $container_id
You can also remove all images and stopped contaners using
docker prune -a
Run the following to see if the cronjob you've defined actually runs.
sudo grep CRON /var/log/syslog
VOILAA...!!!
Top comments (2)
In this blog we are going to demonstrate how to replicate a MariaDB database that runs in a Docker container. Vashikaran Baba Ka Number
Thank you @nicolekaestner