WIP NextCloud using Garage backend, fix app download urls

Remove the networ_interface parameter in nomad config
This means that nomad will now autodetect its own ip address
by looking at the default route.
Thus nodes in a LAN behind a NAT will get their LAN address,
and internet nodes will get their public address.
They won't get their VPN addresses.
This seems not to break Consul's use of VPN addresses to address
services, and fixes attr.unique.network.ip-address for DiploNAT.

ansible/README.md

@@ -13,3 +13,59 @@ For each machine, **one by one** do:
   - Reboot
   - Check that cluster is healthy
 
+## New configuration with Wireguard
+
+This configuration is used to make all of the cluster nodes appear in a single
+virtual private network, enable them to communicate on all ports even if they
+are behind NATs at different locations. The VPN also provides a layer of
+security, encrypting all comunications that occur over the internet.
+
+### Prerequisites
+
+Nodes must all have two publicly accessible ports (potentially routed through a NAT):
+
+- A port that maps to the SSH port (port 22) of the machine, allowing TCP connections
+- A port that maps to the Wireguard port (port 51820) of the machine, allowing UDP connections
+
+
+### Configuration
+
+The network role sets up a Wireguard interface, called `wgdeuxfleurs`, and
+establishes a full mesh between all cluster machines. The following
+configuration variables are necessary in the node list:
+
+- `ansible_host`: hostname to which Ansible connects to, usually the same as `public_ip`
+- `ansible_user`: username to connect as for Ansible to run commands through SSH
+- `ansible_port`: if SSH is not bound publicly on port 22, set the port here
+- `public_ip`: the public IP for the machine or the NATting router behind which the machine is
+- `public_vpn_port`: the public port number on `public_ip` that maps to port 51820 of the machine
+- `vpn_ip`: the IP address to affect to the node on the VPN (each node must have a different one)
+- `dns_server`: any DNS resolver, typically your ISP's DNS or a public one such as OpenDNS
+
+The new iptables configuration now prevents direct communication between
+cluster machines, except on port 51820 which is used to transmit VPN packets.
+All intra-cluster communications must now go through the VPN interface (thus
+machines refer to one another using their VPN IP addresses and never their
+public or LAN addresses).
+
+### Restarting Nomad
+
+When switching to the Wireguard configuration, machines will stop using their
+LAN addresses and switch to using their VPN addresses. Consul seems to handle
+this correctly, however Nomad does not. To make Nomad able to restart
+correctly, its Raft protocol module must be informed of the new IP addresses of
+the cluster members. This is done by creating on all nodes the file
+`/var/lib/nomad/server/raft/peers.json` that contains the list of IP addresses
+of the cluster. Here is an example for such a file:
+
+```
+["10.68.70.11:4647","10.68.70.12:4647","10.68.70.13:4647"]
+```
+
+Once this file is created and is the same on all nodes, restart Nomad on all
+nodes. The cluster should resume operation normally.
+
+The same procedure can also be applied to fix Consul, however my tests showed
+that it didn't break when IP addresses changed (it just took a bit long to come
+back up).
+

ansible/lxvm

@@ -0,0 +1,6 @@
+[cluster_nodes]
+#ubuntu1 ansible_host=192.168.42.10
+debian1 ansible_host=192.168.42.20 ansible_user=root public_ip=192.168.42.20 dns_server=208.67.222.222 vpn_ip=10.68.70.11 public_vpn_port=51820 datacenter=belair interface=enp1s0
+debian2 ansible_host=192.168.42.21 ansible_user=root public_ip=192.168.42.21 dns_server=208.67.222.222 vpn_ip=10.68.70.12 public_vpn_port=51820 datacenter=belair interface=enp1s0
+debian3 ansible_host=192.168.42.22 ansible_user=root public_ip=192.168.42.22 dns_server=208.67.222.222 vpn_ip=10.68.70.13 public_vpn_port=51820 datacenter=belair interface=enp1s0
+ovh1 ansible_host=51.75.4.20 ansible_user=debian ansible_become=yes public_ip=51.75.4.20 dns_server=208.67.222.222 vpn_ip=10.68.70.20 public_vpn_port=51820 datacenter=saturne interface=eth0

ansible/roles/common/tasks/main.yml

@@ -3,6 +3,7 @@
     that:
       - "ansible_architecture == 'aarch64' or ansible_architecture == 'armv7l' or ansible_architecture == 'x86_64'"
       - "ansible_os_family == 'Debian'"
+      - "ansible_distribution_version == '10'"
 
 - name: "Upgrade system"
   apt:
@@ -15,6 +16,7 @@
 - name: "Install base tools"
   apt:
     name:
+      - sudo
       - vim
       - htop
       - screen

ansible/roles/consul/templates/consul.json.j2

@@ -1,17 +1,18 @@
 {
+  "datacenter": "deuxfleurs",
   "data_dir": "/var/lib/consul",
   "bind_addr": "0.0.0.0",
-  "advertise_addr": "{{ public_ip }}",
+  "advertise_addr": "{{ vpn_ip }}",
   "addresses": {
     "dns": "0.0.0.0",
     "http": "0.0.0.0"
   },
   "retry_join": [
-   {% for selected_host in groups['cluster_nodes']|reject("sameas", ansible_fqdn) %}{# @FIXME: Reject doesn't work #}
-     "{{ hostvars[selected_host]['private_ip'] }}" {{ "," if not loop.last else "" }}
+   {% for selected_host in groups['cluster_nodes']|difference([inventory_hostname]) %}{# @FIXME: Reject doesn't work #}
+     "{{ hostvars[selected_host]['vpn_ip'] }}" {{ "," if not loop.last else "" }}
    {% endfor %}
   ],
-  "bootstrap_expect": 3,
+  "bootstrap_expect": {{ groups['cluster_nodes']|length }},
   "server": true,
   "ui": true,
   "ports": {

ansible/roles/consul/templates/resolv.conf.j2

@@ -1,2 +1,2 @@
-nameserver {{ private_ip }}
+nameserver {{ vpn_ip }}
 nameserver {{ dns_server }}

ansible/roles/network/handlers/main.yml

@@ -0,0 +1,5 @@
+---
+- name: reload wireguard
+  service:
+    name: wg-quick@wgdeuxfleurs
+    state: restarted

ansible/roles/network/tasks/main.yml

@@ -1,3 +1,6 @@
+- name: "Create iptables configuration direcetory"
+  file: path=/etc/iptables/ state=directory
+
 - name: "Deploy iptablesv4 configuration"
   template: src=rules.v4.j2 dest=/etc/iptables/rules.v4
 
@@ -9,3 +12,48 @@
     name: net.ipv4.ip_forward
     value: "1"
     sysctl_set: yes
+
+# Wireguard configuration
+- name: "Enable backports repository"
+  apt_repository:
+    repo: deb http://deb.debian.org/debian buster-backports main
+    state: present
+
+- name: "Install wireguard"
+  apt:
+    name:
+      - wireguard
+      - wireguard-tools
+      - "linux-headers-{{ ansible_kernel }}"
+    state: present
+
+- name: "Create wireguard configuration direcetory"
+  file: path=/etc/wireguard/ state=directory
+
+- name: "Check if wireguard private key exists"
+  stat: path=/etc/wireguard/privkey
+  register: wireguard_privkey
+
+- name: "Create wireguard private key"
+  shell: wg genkey > /etc/wireguard/privkey
+  when: wireguard_privkey.stat.exists == false
+  notify:
+    - reload wireguard
+
+- name: "Secure wireguard private key"
+  file: path=/etc/wireguard/privkey mode=0600
+
+- name: "Retrieve wireguard public key"
+  shell: wg pubkey < /etc/wireguard/privkey
+  register: wireguard_pubkey
+
+- name: "Deploy wireguard configuration"
+  template: src=wireguard.conf.j2 dest=/etc/wireguard/wgdeuxfleurs.conf mode=0600
+  notify:
+    - reload wireguard
+
+- name: "Enable Wireguard systemd service at boot"
+  service: name=wg-quick@wgdeuxfleurs state=started enabled=yes daemon_reload=yes
+
+- name: "Create /tmp/wgdeuxfleurs.template.conf example configuration file for external nodes"
+  local_action: template src=wireguard_external.conf.j2 dest=/tmp/wgdeuxfleurs.template.conf

ansible/roles/network/templates/rules.v4.j2

@@ -7,14 +7,21 @@
 -A INPUT -p tcp  --dport 22 -j ACCEPT
 
 # Cluster
--A INPUT -s 192.168.1.254 -j ACCEPT
--A INPUT -s 82.253.205.190 -j ACCEPT
 {% for selected_host in groups['cluster_nodes'] %}
--A INPUT -s {{ hostvars[selected_host]['public_ip'] }} -j ACCEPT
--A INPUT -s {{ hostvars[selected_host]['private_ip'] }} -j ACCEPT
+-A INPUT -s {{ hostvars[selected_host]['public_ip'] }} -p udp --dport 51820 -j ACCEPT
+-A INPUT -s {{ hostvars[selected_host]['vpn_ip'] }} -j ACCEPT
+{% endfor %}
+{% for host in other_vpn_nodes %}
+-A INPUT -s {{ host.public_ip }} -p udp --dport 51820 -j ACCEPT
+-A INPUT -s {{ host.vpn_ip }} -j ACCEPT
 {% endfor %}
 
-# Local
+# Rennes
+-A INPUT -s 93.2.173.168 -j ACCEPT
+-A INPUT -s 82.253.205.190 -j ACCEPT
+# router
+-A INPUT -s 192.168.1.254 -j ACCEPT
+
 -A INPUT -i docker0 -j ACCEPT
 -A INPUT -s 127.0.0.1/8 -j ACCEPT
 -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT

ansible/roles/network/templates/wireguard.conf.j2

@@ -0,0 +1,20 @@
+[Interface]
+Address = {{ vpn_ip }}
+PostUp = wg set %i private-key <(cat /etc/wireguard/privkey)
+ListenPort = 51820
+
+{% for selected_host in groups['cluster_nodes']|difference([inventory_hostname]) %}
+[Peer]
+PublicKey = {{ hostvars[selected_host].wireguard_pubkey.stdout }}
+Endpoint = {{ hostvars[selected_host].public_ip }}:{{ hostvars[selected_host].public_vpn_port }}
+AllowedIPs = {{ hostvars[selected_host].vpn_ip }}/32
+PersistentKeepalive = 25
+{% endfor %}
+
+{% for host in other_vpn_nodes %}
+[Peer]
+PublicKey = {{ host.pubkey }}
+Endpoint = {{ host.public_ip }}:{{ host.public_vpn_port }}
+AllowedIPs = {{ host.vpn_ip }}/32
+PersistentKeepalive = 25
+{% endfor %}

ansible/roles/network/templates/wireguard_external.conf.j2

@@ -0,0 +1,27 @@
+# Template configuration file for VPN nodes that are non in the cluster
+# The private key should be stored as /etc/wireguard/privkey
+# External nodes should be registered in network/vars/main.yml
+
+[Interface]
+Address = <INSERT YOUR IP HERE, IT SHOULD MATCH THE ONE IN vars/main.yml>
+PostUp = wg set %i private-key <(cat /etc/wireguard/privkey)
+ListenPort = 51820
+
+# Cluster nodes
+{% for selected_host in groups['cluster_nodes'] %}
+[Peer]
+PublicKey = {{ hostvars[selected_host].wireguard_pubkey.stdout }}
+Endpoint = {{ hostvars[selected_host].public_ip }}:{{ hostvars[selected_host].public_vpn_port }}
+AllowedIPs = {{ hostvars[selected_host].vpn_ip }}/32
+PersistentKeepalive = 25
+{% endfor %}
+
+# External nodes
+# TODO: remove yourself from here
+{% for host in other_vpn_nodes %}
+[Peer]
+PublicKey = {{ host.pubkey }}
+Endpoint = {{ host.public_ip }}:{{ host.public_vpn_port }}
+AllowedIPs = {{ host.vpn_ip }}/32
+PersistentKeepalive = 25
+{% endfor %}

ansible/roles/network/vars/main.yml

@@ -0,0 +1,6 @@
+---
+other_vpn_nodes:
+  - pubkey: "QUiUNMk70TEQ75Ut7Uqikr5uGVSXmx8EGNkGM6tANlg="
+    public_ip: "37.187.118.206"
+    public_vpn_port: "51820"
+    vpn_ip: "10.68.70.101"

ansible/roles/nomad/tasks/main.yml

@@ -1,7 +1,11 @@
-- name: "Set nomad version"
+- name: "Set Nomad version"
   set_fact:
     nomad_version: 0.12.0-beta2
 
+- name: "Set CNI version"
+  set_fact:
+    cni_plugins_version: 0.8.6
+
 - name: "Download and install Nomad for x86_64"
   unarchive:
     src: "https://releases.hashicorp.com/nomad/{{ nomad_version }}/nomad_{{ nomad_version }}_linux_amd64.zip"
@@ -10,6 +14,19 @@
   when:
     - "ansible_architecture == 'x86_64'"
 
+- name: "Create /opt/cni/bin"
+  file: path=/opt/cni/bin state=directory
+
+- name: "Download and install CNI plugins for x86_64"
+  unarchive:
+    src: "https://github.com/containernetworking/plugins/releases/download/v{{ cni_plugins_version }}/cni-plugins-linux-amd64-v{{ cni_plugins_version }}.tgz"
+    dest: /opt/cni/bin
+    remote_src: yes
+  when:
+    - "ansible_architecture == 'x86_64'"
+  notify:
+    - restart nomad
+
 - name: "Create Nomad configuration directory"
   file: path=/etc/nomad/ state=directory
 

ansible/roles/nomad/templates/nomad.hcl.j2

@@ -1,3 +1,5 @@
+datacenter = "{{ datacenter }}"
+
 addresses {
   http = "0.0.0.0"
   rpc = "0.0.0.0"
@@ -5,16 +7,16 @@ addresses {
 }
 
 advertise {
-  http = "{{ public_ip }}"
-  rpc = "{{ public_ip }}"
-  serf = "{{ public_ip }}"
+  http = "{{ vpn_ip }}"
+  rpc = "{{ vpn_ip }}"
+  serf = "{{ vpn_ip }}"
 }
 
 data_dir = "/var/lib/nomad"
 
 server {
   enabled          = true
-  bootstrap_expect = 3
+  bootstrap_expect = {{ groups['cluster_nodes']|length }}
 }
 
 consul {
@@ -25,10 +27,20 @@ client {
   enabled = true
   #cpu_total_compute = 4000
   servers = ["127.0.0.1:4648"]
-  network_interface = "{{ interface }}"
   options {
     docker.privileged.enabled = "true"
     docker.volumes.enabled = "true"
   } 
+
+  network_interface = "wgdeuxfleurs"
+
+  host_network "default" {
+    #cidr = "{{ vpn_ip }}/24"
+	interface = "wgdeuxfleurs"
+  }
+  host_network "public" {
+    #cidr = "{{ public_ip }}/32"
+	interface = "{{ interface }}"
+  }
 }
 

ansible/roles/storage/tasks/main.yml

@@ -48,7 +48,7 @@
       nfs.export-volumes: "off"
       cluster.lookup-optimize: "on"
 
-    cluster: "{% for selected_host in groups['cluster_nodes'] %}{{ hostvars[selected_host]['private_ip'] }}{{ ',' if not loop.last else '' }}{% endfor %}"
+    cluster: "{% for selected_host in groups['cluster_nodes'] %}{{ hostvars[selected_host]['vpn_ip'] }}{{ ',' if not loop.last else '' }}{% endfor %}"
   run_once: true
 
 - name: "Create mountpoint"
@@ -61,7 +61,7 @@
   tags: gluster-fstab
   mount:
     path: /mnt/glusterfs
-    src: "{{ private_ip }}:/donnees"
+    src: "{{ vpn_ip }}:/donnees"
     fstype: glusterfs
     opts: "defaults,_netdev,noauto,x-systemd.automount"
     state: present

consul/configuration/nextcloud/config.php.tpl

@@ -6,6 +6,7 @@ $CONFIG = array (
   'secret' => '{{ key "secrets/nextcloud/secret" | trimSpace }}',
   'trusted_domains' => array (
     0 => 'nextcloud.deuxfleurs.fr',
+    1 => 'nextcloud.devx.adnab.me',
   ),
   'memcache.local' => '\\OC\\Memcache\\APCu',
 

nomad/bottin2.hcl

@@ -1,5 +1,5 @@
 job "directory2" {
-  datacenters = ["dc1"]
+  datacenters = ["dc1", "saturne", "belair"]
   type = "service"
 
   constraint {
@@ -94,7 +94,7 @@ job "directory2" {
           "guichet",
           "traefik.enable=true",
           "traefik.frontend.entryPoints=https,http",
-          "traefik.frontend.rule=Host:guichet.deuxfleurs.fr",
+          "traefik.frontend.rule=Host:guichet.devx.adnab.me",
         ]
         port = "web_port"
         address_mode = "host"

nomad/garage.hcl

@@ -59,7 +59,7 @@ job "garage" {
           "garage_api",
           "traefik.enable=true",
           "traefik.frontend.entryPoints=https,http",
-          "traefik.frontend.rule=Host:garage.deuxfleurs.fr"
+          "traefik.frontend.rule=Host:garage.deuxfleurs.fr,garage.devx.adnab.me"
         ]
         port = "api_port"
         address_mode = "host"

nomad/gitea.hcl

@@ -0,0 +1,72 @@
+job "git" {
+  datacenters = ["dc1"]
+  type = "service"
+
+  constraint {
+    attribute = "${attr.cpu.arch}"
+    value     = "amd64"
+  }
+
+  constraint {
+    attribute = "${attr.unique.hostname}"
+    value     = "debian1"
+  }
+
+  group "gitea" {
+    task "server" {
+      driver = "docker"
+      config {
+        image = "gitea/gitea:1.10.3"
+        port_map {
+          web_port = 3000
+          ssh_port = 222
+        }
+        volumes = [
+            "/etc/timezone:/etc/timezone:ro",
+            "/etc/localtime:/etc/localtime:ro",
+            "/srv/gitea:/data",
+        ]
+      }
+
+      env {
+        "USER_UID" = "1000"
+        "USER_GID" = "1000"
+        "LOG_LEVEL" = "trace"
+      }
+
+      resources {
+        memory = 100
+        cpu = 100
+        network {
+          port "web_port" {}
+          port "ssh_port" {
+            static = 2222
+          }
+        }
+      }
+
+      service {
+        tags = [
+          "gitea",
+          "traefik.enable=true",
+          "traefik.frontend.entryPoints=https,http",
+          "traefik.frontend.rule=Host:git.deuxfleurs.fr,git.deuxfleurs.org"
+        ]
+        port = "web_port"
+        address_mode = "host"
+        name = "gitea"
+        check {
+          type = "tcp"
+          port = "web_port"
+          interval = "60s"
+          timeout = "5s"
+          check_restart {
+            limit = 3
+            grace = "90s"
+            ignore_warnings = false
+          }
+        }
+      }
+    }
+  }
+ }

nomad/nextcloud.hcl

@@ -45,7 +45,7 @@ job "nextcloud" {
           "nextcloud",
           "traefik.enable=true",
           "traefik.frontend.entryPoints=https,http",
-          "traefik.frontend.rule=Host:nextcloud.deuxfleurs.fr",
+          "traefik.frontend.rule=Host:nextcloud.deuxfleurs.fr,nextcloud.devx.adnab.me",
         ]
         port = "web_port"
         address_mode = "host"

nomad/postgres.hcl

@@ -1,5 +1,5 @@
 job "postgres" {
-  datacenters = ["dc1"]
+  datacenters = ["dc1", "belair"]
   type = "system"
   priority = 90
 
@@ -113,7 +113,7 @@ job "postgres" {
       }
 
       resources {
-        memory = 500
+        memory = 200
         network {
           port "psql_port" {
             static = "5433"

nomad/traefik-netv2.hcl

@@ -0,0 +1,77 @@
+job "frontend" {
+  datacenters = ["dc1", "saturne"]
+  type = "service"
+
+  group "traefik" {
+    network {
+      mode = "bridge"
+      port "http" {
+        static = 80
+        host_network = "public"
+      }
+      port "https" {
+        static = 443
+        host_network = "public"
+      }
+      port "admin" {
+        static = 8082
+      }
+    }
+
+    task "server" {
+      driver = "docker"
+
+      config {
+        image = "amd64/traefik:1.7.20"
+        readonly_rootfs = true
+        volumes = [
+          "secrets/traefik.toml:/etc/traefik/traefik.toml",
+        ]
+      }
+
+      resources {
+        memory = 265
+      }
+
+      template {
+        data = "{{ key \"configuration/traefik/traefik.toml\" }}"
+        destination = "secrets/traefik.toml"
+      }
+    }
+
+    service {
+      tags = [
+        "http", 
+        "frontend",
+        "(diplonat (tcp_port 80))"
+      ]
+      port = "http"
+      name = "traefik"
+    }
+
+    service {
+      tags = [
+        "https", 
+        "frontend",
+        "(diplonat (tcp_port 443))"
+      ]
+      port = "https"
+      name = "traefik"
+
+      check {
+        type = "http"
+        protocol = "http"
+        port = "http"
+        path = "/"
+        interval = "60s"
+        timeout = "5s"
+        check_restart {
+          limit = 3
+          grace = "90s"
+          ignore_warnings = false
+        }
+      }
+    }
+  }
+}
+

nomad/traefik.hcl

@@ -1,5 +1,5 @@
 job "frontend" {
-  datacenters = ["dc1"]
+  datacenters = ["dc1", "saturne"]
   type = "service"
 
   group "traefik" {
@@ -9,6 +9,7 @@ job "frontend" {
       config {
         image = "amd64/traefik:1.7.20"
         readonly_rootfs = true
+        network_mode = "host"
         port_map {
           https_port = 443
           http_port = 80
@@ -24,9 +25,11 @@ job "frontend" {
         network {
           port "https_port" {
             static = "443"
+            host_network = "public"
           }
           port "http_port" {
             static = "80"
+            host_network = "public"
           }
           port "adm_port" {
             static = "8082"
@@ -34,20 +37,23 @@ job "frontend" {
         }
       }
       
+      template {
+        data = "{{ key \"configuration/traefik/traefik.toml\" }}"
+        destination = "secrets/traefik.toml"
+      }
+
       service {
         tags = [
-          "https", 
+          "http", 
           "frontend",
-          "(diplonat (tcp_port 80 443))"
+          "(diplonat (tcp_port 80))"
         ]
-        port = "https_port"
-        address_mode = "host"
-        name = "traefik"
+        port = "http_port"
+        name = "traefik-http"
+
         check {
-          type = "http"
-          protocol = "http"
-          port = "adm_port"
-          path = "/ping"
+          type = "tcp"
+          port = "http_port"
           interval = "60s"
           timeout = "5s"
           check_restart {
@@ -58,9 +64,27 @@ job "frontend" {
         }
       }
 
-      template {
-        data = "{{ key \"configuration/traefik/traefik.toml\" }}"
-        destination = "secrets/traefik.toml"
+      service {
+        tags = [
+          "https", 
+          "frontend",
+          "(diplonat (tcp_port 443))"
+        ]
+        port = "https_port"
+        address_mode = "host"
+        name = "traefik-https"
+
+        check {
+          type = "tcp"
+          port = "https_port"
+          interval = "60s"
+          timeout = "5s"
+          check_restart {
+            limit = 3
+            grace = "90s"
+            ignore_warnings = false
+          }
+        }
       }
     }
   }