MariaDB Galera Cluster Setup Script

This project provides a Bash script to configure and set up a MariaDB Galera Cluster with options for 2 to 5 nodes. The script automates the configuration of /etc/hosts and MariaDB settings for each node in the cluster.

Features

Configures /etc/hosts with the IP addresses, hostnames, and host aliases of the nodes.
Updates MariaDB configuration for Galera cluster settings.
Option to specify which node is the MASTER node.
Restarts the MariaDB service and displays the status.

Prerequisites

Bash shell
MariaDB installed on all nodes
Galera plugin for MariaDB

Usage

Clone the repository:

git clone https://github.com/alilotfi23/Bash-galera.git
cd Bash-galera

Make the script executable:
```
chmod +x setup_galera_cluster.sh
```
Run the script:
```
./galera.sh
```

Script Breakdown

Function: `node2()`

Prompts for the IP, hostname, and host alias of two nodes.
Appends these details to /etc/hosts.
Configures MariaDB for the Galera cluster.
Restarts MariaDB and displays the service status.

Function: `node3()`

Prompts for the IP, hostname, and host alias of three nodes.
Appends these details to /etc/hosts.
Configures MariaDB for the Galera cluster.
Restarts MariaDB and displays the service status.

Function: `node4()`

Prompts for the IP, hostname, and host alias of four nodes.
Appends these details to /etc/hosts.
Configures MariaDB for the Galera cluster.
Restarts MariaDB and displays the service status.

Function: `node5()`

Prompts for the IP, hostname, and host alias of five nodes.
Appends these details to /etc/hosts.
Configures MariaDB for the Galera cluster.
Restarts MariaDB and displays the service status.

Node Selection

The script provides a menu to select the number of nodes for the cluster.
Based on the selection, the corresponding function (node2, node3, node4, or node5) is called.

Example Menu

PS3="Select node count: "

select choice in "2node" "3node"  "4node" "5node"  "Exit"

do

case $REPLY in

1)
node2
;;
2)
node3
;;
3)
node4
;;
4)
node5
;;
5)
echo "...Bye..."
exit 0
;;
*)
echo "Invalid Choice"

esac

done

Conclusion

This script simplifies the setup process for a MariaDB Galera Cluster by automating the configuration of multiple nodes. Ensure you have the necessary prerequisites installed before running the script.

alilotfi23/Bash-galera