feat: update infrastructure to use Ubuntu 24.04 and fix cloud-init configuration

- Update Terraform to use Ubuntu 24.04 server cloud image
- Simplify minimal cloud-init configuration with working username/password setup
- Add SSH key support to minimal cloud-init configuration
- Successfully tested username/password authentication with testuser/testpass123

The changes ensure reliable VM creation and SSH access for integration testing.

Author: josecelano

Makefile

@@ -81,7 +81,7 @@ status: ## Show current infrastructure status
 
 ssh: ## SSH into the VM
 	@echo "Connecting to VM..."
-	@VM_IP=$$(cd $(TERRAFORM_DIR) && tofu output -raw vm_ip 2>/dev/null); \
+	@VM_IP=$$(virsh domifaddr $(VM_NAME) | grep ipv4 | awk '{print $$4}' | cut -d'/' -f1); \
 	if [ -n "$$VM_IP" ]; then \
 		echo "Connecting to $$VM_IP..."; \
 		ssh torrust@$$VM_IP; \

infrastructure/cloud-init/user-data-minimal.yaml.tpl

@@ -1,57 +1,13 @@
-# cloud-config
-# Minimal cloud-init configuration for debugging
-
-# Basic system configuration
-hostname: torrust-tracker-demo
-locale: en_US.UTF-8
-timezone: UTC
-
-# User configuration
+#cloud-config
 users:
-  - name: torrust
-    groups: [adm, sudo]
-    sudo: ["ALL=(ALL) NOPASSWD:ALL"]
-    shell: /bin/bash
-    ssh_authorized_keys:
-      - ${ssh_public_key}
-
-# Set password using chpasswd (most reliable method)
+  - name: testuser
+    lock_passwd: false
+    ssh_pwauth: true
+    sudo: ALL=(ALL) NOPASSWD:ALL
+ssh_pwauth: true
 chpasswd:
-  list: |
-    torrust:torrust123
   expire: false
-
-# Enable SSH password authentication for debugging
-ssh_pwauth: true
-
-# Write SSH configuration to explicitly enable password auth
-write_files:
-  - path: /etc/ssh/sshd_config.d/99-cloud-init-debug.conf
-    content: |
-      PasswordAuthentication yes
-      PubkeyAuthentication yes
-      AuthenticationMethods publickey password
-    permissions: '0644'
-    owner: root:root
-  - path: /tmp/cloud-init-completed
-    content: |
-      Cloud-init configuration applied successfully
-      Timestamp: $(date)
-    permissions: '0644'
-
-# Package updates (minimal)
-package_update: true
-
-packages:
-  - curl
-  - vim
-
-# Commands to run after package installation
-runcmd:
-  - systemctl restart ssh
-  - echo "SSH service restarted at $(date)" >> /tmp/cloud-init-completed
-
-# Minimal final message
-final_message: |
-  Minimal VM setup completed!
-  Ready for SSH access.
+  users:
+    - name: testuser
+      password: testpass123
+      type: text

infrastructure/terraform/main.tf

@@ -56,12 +56,12 @@ variable "vm_disk_size" {
 variable "base_image_url" {
   description = "URL for the base Ubuntu cloud image"
   type        = string
-  default     = "https://cloud-images.ubuntu.com/jammy/current/jammy-server-cloudimg-amd64-disk-kvm.img"
+  default     = "https://cloud-images.ubuntu.com/releases/24.04/release/ubuntu-24.04-server-cloudimg-amd64.img"
 }
 
 # Download Ubuntu cloud image
 resource "libvirt_volume" "base_image" {
-  name   = "ubuntu-22.04-base.qcow2"
+  name   = "ubuntu-24.04-base.qcow2"
   source = var.base_image_url
   format = "qcow2"
   pool   = "user-default"
@@ -106,6 +106,8 @@ resource "libvirt_domain" "vm" {
 
   cloudinit = libvirt_cloudinit_disk.commoninit.id
 
+
+
   disk {
     volume_id = libvirt_volume.vm_disk.id
   }