Practice 3. Dynamic DNS

Name: Francisco Mateos Bufí

Here is a concise, clear list of instructions describing what the project should do using Vagrant + VirtualBox + Ansible, without explaining DHCP/DNS logic.

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Instructions for the Project (Vagrant + VirtualBox + Ansible)

1. Create a Vagrantfile that defines multiple virtual machines using VirtualBox as the provider.

   • Assign each machine a hostname.
   • Configure private network interfaces with static IPs.
   • Allocate resources (RAM/CPU) as needed.
   • Ensure SSH access is available for Ansible.

2. Set up automatic provisioning in Vagrant so that each VM is configured using Ansible when it is created.

   • Use ansible or ansible_local as the provisioner.
   • Map each VM to the correct Ansible playbook.

3. Prepare an Ansible inventory file (inventory.yml) that groups the machines according to their roles.

   • Define hostnames, IP addresses, and connection options.
   • Organize machines logically (e.g., DNS server, DHCP server, clients).

4. Create Ansible playbooks that fully automate the configuration of each virtual machine.

   • Install required packages using the appropriate modules.
   • Deploy configuration files.
   • Modify system settings through Ansible tasks.
   • Manage and restart services as needed.
   • Ensure every playbook is idempotent and repeatable.

5. Configure ansible.cfg to define default settings for your automation.

   • Set the inventory path.
   • Disable host key checking.
   • Define interpreter and connection behaviors.

6. Add a script (script.sh) if desired, to simplify running the entire environment with a single command.

7. Run the environment using:

   vagrant up

   This should automatically:

   • Create all virtual machines.
   • Configure them using Ansible.

8. Shut down or remove the environment for cleanup:

   vagrant halt
   vagrant destroy -f

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