Implement Vagrantfile for generic testing environment (#474)

* Add Vagrantfile and config.yml for generic testing environment setup

* Rename vagrantfile storing directory

* Add vagrant basic environment README.md

* Remove basic_env folder

* Fix typo on Vagrantfile

* Add pre-start bash script to generate the certificates

---------

Co-authored-by: Álex Ruiz <[email protected]>

test-tools/README.md

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+# Basic cluster environment
+
+This is a environment definition with the required configuration to be prepared to freshly install a Wazuh Indexer
+cluster with two nodes using Vagrant and Libvirt to provision the Virtual Machines.
+
+It also generates the node's required certificates using the `wazuh-certs-tool` and copy them to each node's `home`
+directory, leaving a copy in `test-tools/basic_env`.
+
+### Prerequisites
+
+1. Download and install Vagrant ([source](https://developer.hashicorp.com/vagrant/downloads))
+2. Install vagrant-libvirt ([source](https://vagrant-libvirt.github.io/vagrant-libvirt/installation.html))
+   > In some cases you must also install `libvirt-dev`
+
+## Usage
+
+1. Navigate to the environment's root directory
+   ```bash
+   cd test-tools/basic_env
+   ```
+2. Initialize the environment
+   ```bash
+   vagrant up
+   ```
+3. Connect to the different systems
+   ```bash
+   vagrant ssh indexer_[1|2]
+   ```
+
+### Cleanup
+
+After the testing session is complete you can stop or destroy the environment as you wish:
+
+- Stop the environment:
+  ```bash
+  vagrant halt
+  ```
+- Destroy the environment:
+  ```bash
+  vagrant destroy -f
+  ```

test-tools/Vagrantfile

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+system("
+    if [ #{ARGV[0]} = 'up' ]; then
+        echo 'Executing pre-start script.'
+        bash ./pre-start.sh
+    fi
+")
+
+Vagrant.configure("2") do |config|
+    config.vm.define "indexer_1" do |indexer_1|
+        indexer_1.vm.box = "generic/rhel9"
+        indexer_1.vm.synced_folder ".", "/vagrant"
+        indexer_1.vm.network "private_network", ip: "192.168.56.10"
+        indexer_1.vm.hostname = "node-1"
+        indexer_1.vm.provider "libvirt" do |vb|
+            vb.memory = "6144"
+            vb.cpus = "4"
+        end
+        indexer_1.vm.provision "shell", inline: <<-SHELL
+            sudo systemctl stop firewalld
+            sudo systemctl disable firewalld
+            sudo yum clean all
+            # Add node-2 to /etc/hosts
+            sudo echo "192.168.56.11 node-2" >> /etc/hosts
+            # Copy generated certificates
+            cp /vagrant/wazuh-certificates.tar /home/vagrant/wazuh-certificates.tar
+        SHELL
+    end
+    config.vm.define "indexer_2" do |indexer_2|
+        indexer_2.vm.box = "generic/ubuntu2204"
+        indexer_2.vm.synced_folder ".", "/vagrant"
+        indexer_2.vm.network "private_network", ip: "192.168.56.11"
+        indexer_2.vm.hostname = "node-2"
+        indexer_2.vm.provider "libvirt" do |vb|
+            vb.memory = "6144"
+            vb.cpus = "4"
+        end
+        indexer_2.vm.provision "shell", inline: <<-SHELL
+            sudo systemctl stop ufw
+            sudo systemctl disable ufw
+            sudo apt install sshpass -y
+            # Add node-1 to /etc/hosts
+            echo "192.168.56.10 node-1" >> /etc/hosts
+            # Copy generated certificates
+            cp /vagrant/wazuh-certificates.tar /home/vagrant/wazuh-certificates.tar
+        SHELL
+    end
+end

test-tools/config.yml

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+nodes:
+  # Wazuh indexer nodes
+  indexer:
+    - name: node-1
+      ip: "192.168.56.10"
+    - name: node-2
+      ip: "192.168.56.11"

test-tools/pre-start.sh

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+#!/bin/bash
+
+# SPDX-License-Identifier: Apache-2.0
+# The OpenSearch Contributors require contributions made to
+# this file be licensed under the Apache-2.0 license or a
+# compatible open source license.
+
+# Download the Wazuh certs tool
+curl -sO https://packages.wazuh.com/4.9/wazuh-certs-tool.sh
+
+# Make the script executable
+chmod +x ./wazuh-certs-tool.sh
+
+# Run the Wazuh certs tool
+bash ./wazuh-certs-tool.sh -A
+
+# Create a tarball of the generated certificates
+tar -cvf ./wazuh-certificates.tar -C ./wazuh-certificates/ .
+
+# Clean up
+rm -rf ./wazuh-certificates wazuh-certs-tool.sh *.log
+
+echo "Setup complete and certificates archived."