Add wireguard

infrastructure/create-resources/ansible/inventory/group_vars/all.yml

@@ -2,6 +2,14 @@
 k3s_version: v1.22.3+k3s1
 ansible_user: root
 systemd_dir: /etc/systemd/system
+systemd_network_dir: /etc/systemd/network
 master_ip: "{{ hostvars[groups['serverctl_master_hosts'][0]]['ansible_host'] | default(groups['serverctl_master_hosts'][0]) }}"
 extra_server_args: ""
 extra_agent_args: ""
+
+ansible_become_method: su
+
+ufw_enabled: true
+
+wireguard_mask_bits: 24
+wireguard_port: 51871

infrastructure/create-resources/ansible/inventory/hosts.cfg

@@ -0,0 +1,18 @@
+[serverctl_master_hosts]
+
+[serverctl_node_hosts]
+
+[serverctl_mesh_nodes]
+65.21.50.146 ansible_host=65.21.50.146 wireguard_ip=192.168.0.1
+65.21.251.3 ansible_host=65.21.251.3 wireguard_ip=192.168.0.2
+65.21.255.102 ansible_host=65.21.255.102 wireguard_ip=192.168.0.3
+95.216.162.16 ansible_host=95.216.162.16 wireguard_ip=192.168.0.4
+
+[serverctl_mesh_nodes:vars]
+pipelining=true
+ansible_ssh_user=root
+ansible_ssh_port=22
+
+[serverctl_cluster:children]
+serverctl_master_hosts
+serverctl_node_hosts

infrastructure/create-resources/ansible/ping.yml

@@ -0,0 +1,7 @@
+---
+- hosts: serverctl_mesh_nodes
+  gather_facts: yes
+  tasks:
+    - name: ping
+      command: "ping -c3 {{ hostvars[item].wireguard_ip}}"
+      with_items: "{{groups['all']}}"

infrastructure/create-resources/ansible/roles/wireguard/mesh/handlers/main.yml

@@ -0,0 +1,7 @@
+---
+- name: systemd network restart
+  service:
+    name: systemd-networkd
+    state: restarted
+    enabled: yes
+  become: yes

infrastructure/create-resources/ansible/roles/wireguard/mesh/tasks/main.yml

@@ -0,0 +1,128 @@
+---
+- name: update packages
+  apt:
+    update_cache: yes
+    cache_valid_time: 3600
+  become: yes
+
+
+- name: install ufw
+  apt:
+    name: ufw
+    state: present
+  become: yes
+  when: ufw_enabled
+
+- name: Allow SSH in UFW
+  ufw:
+    rule: allow
+    port: "{{ ansible_ssh_port }}"
+    proto: tcp
+  become: yes
+  when: ufw_enabled
+
+- name: Set ufw logging
+  ufw:
+    logging: "on"
+  become: yes
+  when: ufw_enabled
+
+- name: inter-node Wireguard UFW connectivity
+  ufw:
+    rule: allow
+    src: "{{ hostvars[item].wireguard_ip }}"
+  with_items: "{{ groups['all'] }}"
+  become: yes
+  when: ufw_enabled and item != inventory_hostname
+
+- name: Reject everything and enable UFW
+  ufw:
+    state: enabled
+    policy: reject
+    log: yes
+  become: yes
+  when: ufw_enabled
+
+- name: enable and persist ip forwarding
+  sysctl:
+    name: net.ipv4.ip_forward
+    value: "1"
+    state: present
+    sysctl_set: yes
+    reload: yes
+
+- name: install wireguard
+  apt:
+    name: wireguard
+    state: present
+  become: yes
+
+- name: generate wireguard keypair
+  shell: wg genkey | tee /etc/wireguard/privatekey | wg pubkey | tee /etc/wireguard/publickey
+  args:
+    creates: /etc/wireguard/privatekey
+  become: yes
+
+- name: register private key
+  shell: cat /etc/wireguard/privatekey
+  register: wireguard_private_key
+  changed_when: false
+  become: yes
+
+- name: register public key
+  shell: cat /etc/wireguard/publickey
+  register: wireguard_public_key
+  changed_when: false
+  become: yes
+
+- name: generate preshared keypair
+  shell: "wg genpsk > /etc/wireguard/psk-{{item}}"
+  args:
+    creates: "/etc/wireguard/psk-{{item}}"
+  when: inventory_hostname < item
+  with_items: "{{groups['serverctl_mesh_nodes']}}"
+  become: yes
+
+- name: register preshared key
+  shell: "cat /etc/wireguard/psk-{{item}}"
+  register: wireguard_preshared_key
+  changed_when: false
+  when: inventory_hostname < item
+  with_items: "{{groups['serverctl_mesh_nodes']}}"
+  become: yes
+
+- name: message preshared keys
+  set_fact: "wireguard_preshared_keys={{wireguard_preshared_keys|default({}) | combine({item.item: item.stdout})}}"
+  when: item.skipped is not defined
+  with_items: "{{wireguard_preshared_key.results}}"
+  become: yes
+
+- name: Setup wgserverctl0 device
+  template:
+    src: 'systemd.netdev'
+    dest: '{{systemd_network_dir}}/99-wg0.netdev'
+    owner: root
+    group: systemd-network
+    mode: 0640
+  become: yes
+  notify: systemd network restart
+
+- name: Setup wgserverctl0 network
+  template:
+    src: 'systemd.network'
+    dest: "{{systemd_network_dir}}/99-wg0.network"
+    owner: root
+    group: systemd-network
+    mode: 0640
+  become: yes
+  notify: systemd network restart
+
+#- name: Start and enalbe wireguard on book
+#  systemd:
+#    name: wg-quick@wgserverctl0
+#    enabled: yes
+#    state: started
+
+#- debug: msg="{{item.1}} - {{ (wireguard_base_ipv4|ipaddr(item.0 + 1)) }}"
+#  with_indexed_items: "{{groups.serverctl_mesh_nodes}}"
+

infrastructure/create-resources/ansible/roles/wireguard/mesh/templates/systemd.netdev

@@ -0,0 +1,20 @@
+[NetDev]
+Name=wg0
+Kind=wireguard
+Description=WireGuard tunnel wg0
+
+[WireGuard]
+ListenPort={{ wireguard_port }}
+PrivateKey={{ wireguard_private_key.stdout }}
+
+{% for peer in groups['serverctl_mesh_nodes'] %}
+{% if peer != inventory_hostname %}
+
+[WireGuardPeer]
+PublicKey={{ hostvars[peer].wireguard_public_key.stdout }}
+PresharedKey={{ wireguard_preshared_keys[peer] if inventory_hostname < peer else hostvars[peer].wireguard_preshared_keys[inventory_hostname] }}
+AllowedIPs={{ hostvars[peer].wireguard_ip }}/32
+Endpoint={{ hostvars[peer].ansible_host }}:{{ wireguard_port }}
+PersistentKeepalive=25
+{% endif %}
+{% endfor %}

infrastructure/create-resources/ansible/roles/wireguard/mesh/templates/systemd.network

@@ -0,0 +1,5 @@
+[Match]
+Name=wg0
+
+[Network]
+Address={{ wireguard_ip }}/{{ wireguard_mask_bits }}

infrastructure/create-resources/ansible/site.yml

@@ -9,6 +9,13 @@
   become: yes
   roles:
     - role: "./k3s/master"
+
+- hosts: serverctl_mesh_nodes
+  become: yes
+  gather_facts: yes
+  roles:
+    - role: './wireguard/mesh'
+
 #- hosts: serverctl_node_hosts
 #  become: yes
 #  roles:

infrastructure/create-resources/hcloud.tf

@@ -1,4 +1,3 @@
-
 variable "serverctl_master_count" {
   default = 0
 }
@@ -7,6 +6,9 @@ variable "serverctl_node_count" {
   default = 0
 }
 
+variable "serverctl_mesh_count" {
+  default = 4
+}
 
 resource "hcloud_placement_group" "serverctl_master" {
   name = "serverctl_master_group"
@@ -18,7 +20,7 @@ resource "hcloud_server" "serverctl_master" {
   name        = "serverctl-master-${count.index}"
   image       = "debian-11"
   server_type = "cx11"
-  ssh_keys = [
+  ssh_keys    = [
     var.hcloud_serverctl_ssh_key_id
   ]
   placement_group_id = hcloud_placement_group.serverctl_master.id
@@ -50,7 +52,7 @@ resource "hcloud_server" "serverctl_node" {
   name        = "serverctl-node-${count.index}"
   image       = "debian-11"
   server_type = "cx11"
-  ssh_keys = [
+  ssh_keys    = [
     var.hcloud_serverctl_ssh_key_id
   ]
   placement_group_id = hcloud_placement_group.serverctl_node.id
@@ -72,11 +74,44 @@ resource "hcloud_server" "serverctl_node" {
   }
 }
 
+resource "hcloud_placement_group" "serverctl_mesh" {
+  name = "serverctl_mesh_group"
+  type = "spread"
+}
+
+resource "hcloud_server" "serverctl_mesh" {
+  count       = var.serverctl_mesh_count
+  name        = "serverctl-mesh-${count.index}"
+  image       = "debian-11"
+  server_type = "cx11"
+  ssh_keys    = [
+    var.hcloud_serverctl_ssh_key_id
+  ]
+  placement_group_id = hcloud_placement_group.serverctl_mesh.id
+
+
+  lifecycle {
+    create_before_destroy = true
+  }
+
+  provisioner "remote-exec" {
+    inline = ["sudo apt update", "sudo apt install python3 -y", "echo Done!"]
+
+    connection {
+      host        = self.ipv4_address
+      type        = "ssh"
+      user        = "root"
+      private_key = file(var.pvt_key)
+    }
+  }
+}
+
 resource "local_file" "hosts_cfg" {
-  content = templatefile("${path.module}/templates/hosts.tpl",
+  content = templatefile("${path.module}/templates/hosts.tftpl",
     {
-      serverctl_masters = hcloud_server.serverctl_master.*.ipv4_address
-      serverctl_nodes   = hcloud_server.serverctl_node.*.ipv4_address
+      serverctl_masters    = hcloud_server.serverctl_master.*.ipv4_address
+      serverctl_nodes      = hcloud_server.serverctl_node.*.ipv4_address
+      serverctl_mesh_nodes = hcloud_server.serverctl_mesh.*.ipv4_address
     }
   )
   filename = "ansible/inventory/hosts.cfg"

infrastructure/create-resources/templates/hosts.tftpl

@@ -0,0 +1,23 @@
+[serverctl_master_hosts]
+%{ for ip in serverctl_masters ~}
+${ip}
+%{ endfor ~}
+
+[serverctl_node_hosts]
+%{ for ip in serverctl_nodes ~}
+${ip}
+%{ endfor ~}
+
+[serverctl_mesh_nodes]
+%{ for ip in serverctl_mesh_nodes ~}
+${ip} ansible_host=${ip} wireguard_ip=${cidrhost("192.168.0.0/24", index(serverctl_mesh_nodes, ip) + 1)}
+%{ endfor ~}
+
+[serverctl_mesh_nodes:vars]
+pipelining=true
+ansible_ssh_user=root
+ansible_ssh_port=22
+
+[serverctl_cluster:children]
+serverctl_master_hosts
+serverctl_node_hosts

infrastructure/create-resources/templates/hosts.tpl

@@ -1,13 +0,0 @@
-[serverctl_master_hosts]
-%{ for ip in serverctl_masters ~}
-${ip}
-%{ endfor ~}
-
-[serverctl_node_hosts]
-%{ for ip in serverctl_nodes ~}
-${ip}
-%{ endfor ~}
-
-[serverctl_cluster:children]
-serverctl_master_hosts
-serverctl_node_hosts