diff --git a/os/config/hammerhead_inventory.yml b/os/config/hammerhead_inventory.yml
new file mode 100644
index 0000000..dd2117e
--- /dev/null
+++ b/os/config/hammerhead_inventory.yml
@@ -0,0 +1,17 @@
+cluster_nodes:
+  hosts:
+    hammerhead:
+      ansible_host: ns3118584.ip-5-135-179.eu
+      ansible_port: 110
+      ansible_user: root
+      ansible_ssh_private_key_file: /home/adrien/.ssh/hammerhead
+      ansible_become: true
+      ipv4: 5.135.179.11
+      gatewayv4: 5.135.179.254
+      ipv6: 2001:41d0:8:ba0b::1
+      gatewayv6: fe80::264:40ff:fe3a:fac0
+      interface: eno1
+      dns_1: 213.186.33.99
+      dns_2: 172.104.136.243
+      ansible_python_interpreter: python3
+      ssh_port: 110
diff --git a/os/config/roles/common/tasks/docker.yml b/os/config/roles/common/tasks/docker.yml
new file mode 100644
index 0000000..a688f4b
--- /dev/null
+++ b/os/config/roles/common/tasks/docker.yml
@@ -0,0 +1,75 @@
+# From the official Docker installation guide for Debian:
+# https://docs.docker.com/engine/install/debian/
+
+# Uninstall old Docker versions
+# $ sudo apt-get remove docker docker-engine docker.io containerd runc
+- name: "Remove old Docker versions"
+  ansible.builtin.apt: 
+    state: absent 
+    name:
+      - docker
+      - docker-engine
+      - docker.io
+      - containerd
+      - runc
+
+# Install dependencies
+# > apt-transport-https ca-certificates curl gnupg lsb-release
+- name: "Install Docker dependencies"
+  ansible.builtin.apt:
+    state: present 
+    name:
+      - apt-transport-https
+      - ca-certificates
+      # - curl # Already installed in main.yml
+      - gnupg
+      - lsb-release
+
+# Dowload Docker's official GPG key
+# $  curl -fsSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
+- name: "Add Docker's official GPG key to apt"
+  ansible.builtin.apt_key:
+    id: 9DC858229FC7DD38854AE2D88D81803C0EBFCD88
+    url: https://download.docker.com/linux/debian/gpg
+    # Key destination path
+    keyring: /usr/share/keyrings/docker-archive-keyring.gpg
+    state: present
+
+
+# Add Docker's repository to apt
+# $ echo \
+#   "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/debian \
+#   $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+- name: "Add Docker's repository to APT sources list"
+  ansible.builtin.apt_repository:
+    repo: "deb [arch={{ architecture_map[ansible_architecture] }} signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/debian {{ ansible_distribution_release }} stable"
+    state: present
+  vars:
+    architecture_map:
+      "x86_64": "amd64"
+      "aarch64": "arm64"
+      "aarch": "arm64"
+      "armhf": "armhf"
+      "armv7l": "armhf"
+
+# Install Docker engine
+# $ sudo apt-get update
+# $ sudo apt-get install docker-ce docker-ce-cli containerd.io
+- name: "Install Docker engine"
+  ansible.builtin.apt:
+    state: present
+    update_cache: yes
+    name:
+      - docker-ce
+      - docker-ce-cli
+      - containerd.io
+
+# Install docker-compose 
+# $ sudo curl -L "https://github.com/docker/compose/releases/download/1.28.5/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
+- name: "Install Docker Compose"
+  ansible.builtin.get_url:
+    url: "https://github.com/docker/compose/releases/download/{{ compose_version }}/docker-compose-{{ ansible_system }}-{{ ansible_architecture }}"
+    dest: /usr/local/bin/docker-compose
+    mode: "0755"
+  vars:
+    compose_version: 1.28.5
\ No newline at end of file
diff --git a/os/config/roles/common/tasks/hashicorp.yml b/os/config/roles/common/tasks/hashicorp.yml
new file mode 100644
index 0000000..9cf647b
--- /dev/null
+++ b/os/config/roles/common/tasks/hashicorp.yml
@@ -0,0 +1,24 @@
+- name: "Add Hashicorps's official GPG key to apt"
+  ansible.builtin.apt_key:
+    url: https://apt.releases.hashicorp.com/gpg
+    state: present
+
+- name: "Add Hashicorp's repository to APT sources list"
+  ansible.builtin.apt_repository:
+    repo: "deb [arch={{ architecture_map[ansible_architecture] }}] https://apt.releases.hashicorp.com {{ ansible_distribution_release }} main"
+    state: present
+  vars:
+    architecture_map:
+      "x86_64": "amd64"
+      "aarch64": "arm64"
+      "aarch": "arm64"
+      "armhf": "armhf"
+      "armv7l": "armhf"
+
+- name: "Install Nomad & Consul"
+  ansible.builtin.apt:
+    state: present
+    update_cache: yes
+    name:
+      - nomad 
+      - consul
\ No newline at end of file