Add nginx as a role dependency where required

This is pretty much anywhere a LE certificate is needed. Similar for
nginx-php for PHP sites. Drop these roles from setup.yml.

roles/debian/files/nftables.conf

@@ -23,14 +23,6 @@ table inet filter {
             nd-neighbor-advert, nd-neighbor-solicit, nd-router-advert, nd-router-solicit
         } accept comment "accept IPv6 neighbor discovery"
     }
-
-    chain forward {
-        type filter hook forward priority filter; policy drop
-    }
-
-    chain output {
-        type filter hook output priority filter; policy accept
-    }
 }
 
 include "/etc/nftables.d/*.nft"

roles/dokuwiki/meta/main.yml

@@ -0,0 +1,3 @@
+dependencies:
+  - role: nginx
+  - role: nginx-php

roles/forgejo/meta/main.yml

@@ -0,0 +1,2 @@
+dependencies:
+  - role: nginx

roles/friwall/meta/main.yml

@@ -0,0 +1,2 @@
+dependencies:
+  - role: nginx

roles/grafana/meta/main.yml

@@ -0,0 +1,2 @@
+dependencies:
+  - role: nginx

roles/influxdb/meta/main.yml

@@ -0,0 +1,2 @@
+dependencies:
+  - role: nginx

roles/kanboard/meta/main.yml

@@ -0,0 +1,3 @@
+dependencies:
+  - role: nginx
+  - role: nginx-php

roles/netbox/meta/main.yml

@@ -0,0 +1,2 @@
+dependencies:
+  - role: nginx

roles/ocserv/README.md

@@ -0,0 +1,11 @@
+Install and configure ocserv with a script to configure nftables on (dis)connection.
+
+Create a self‐signed CA authority for issuing user certificates. User and group are read from the CN and OU certificate subject fields, respectively. To configure VPN groups, define the variable `vpn` as follows:
+
+    "vpn": {
+        "network": "<VPN network>"
+        "routes": {
+            "<group>": [ "<route>", … ]
+            …
+        }
+    }

roles/ocserv/files/ocserv-script

@@ -0,0 +1,25 @@
+#!/bin/sh
+
+set -x
+
+[ -n "$DEVICE" ] || exit 1
+[ -n "$USERNAME" ] || exit 2
+[ -n "$IP_REMOTE" ] || exit 3
+
+chain="inet ocserv client-${USERNAME}"
+remote_ip="${IP_REMOTE%/*}"
+
+case "${REASON}" in
+connect)
+	nft "add chain ${chain} { type filter hook forward priority filter; policy accept; }"
+	nft "flush chain ${chain}" # in case it already existed and not empty
+	if [ -n "$OCSERV_ROUTES" ] ; then
+		# convert netmask to prefix len, e.g. /255.0.0.0 to /8 and replace spaces with commas
+		routes="$(netmask $OCSERV_ROUTES | paste -s -d ',' | tr -d '[:space:]')"
+		nft "add rule ${chain} iif ${DEVICE} ip saddr ${remote_ip} ip daddr { ${routes} } mark set 0x100"
+	fi
+	;;
+disconnect)
+	nft "delete chain ${chain}"
+	;;
+esac

roles/ocserv/files/ocserv.nft

@@ -0,0 +1,14 @@
+table inet ocserv {
+    chain forward {
+        type filter hook forward priority filter + 10; policy drop;
+        ct state { established, related } accept
+        meta mark 0x100 accept
+    }
+}
+
+table ip ocserv {
+    chain postrouting {
+        type nat hook postrouting priority srcnat; policy drop;
+        meta mark 0x100 masquerade
+    }
+}

roles/ocserv/handlers/main.yml

@@ -0,0 +1,15 @@
+- name: reload nftables
+  service:
+    name: nftables
+    state: reloaded
+  when: "'handler' not in ansible_skip_tags"
+
+- name: reload systemd
+  command: systemctl daemon-reload
+  when: "'handler' not in ansible_skip_tags"
+
+- name: restart ocserv
+  service:
+    name: ocserv
+    state: restarted
+  when: "'handler' not in ansible_skip_tags"

roles/ocserv/meta/main.yml

@@ -0,0 +1,2 @@
+dependencies:
+  - role: nginx

roles/ocserv/tasks/main.yml

@@ -0,0 +1,78 @@
+- name: Install packages
+  package:
+    name:
+      - netmask # for ocserv-script
+      - ocserv
+    install_recommends: false # don’t install dnsmasq for whatever reason
+
+- name: Configure firewall
+  copy:
+    dest: /etc/nftables.d/
+    src: ocserv.nft
+  notify: reload nftables
+
+- name: Generate CA key
+  command:
+    cmd: openssl genpkey -algorithm ec -pkeyopt ec_paramgen_curve:P-256 -out ca.key
+    chdir: /etc/ocserv
+    creates: ca.key
+  notify: restart ocserv
+
+- name: Create CA certificate
+  command:
+    cmd: >
+      openssl req -key ca.key -out ca.crt -new -x509 -days 3650
+          -subj "/O=FRI/CN=vrata"
+          -addext keyUsage=critical,keyCertSign,cRLSign
+    chdir: /etc/ocserv
+    creates: ca.crt
+  notify: restart ocserv
+
+# this script allows routing from the client to their networks on connection
+- name: Install ocserv firewall script
+  copy:
+    dest: /usr/local/bin/
+    src: ocserv-script
+    mode: 755
+
+- name: Configure ocserv
+  template:
+    dest: /etc/ocserv/ocserv.conf
+    src: ocserv.conf.j2
+  notify: restart ocserv
+
+- name: Create config-per-group directory
+  file:
+    path: /etc/ocserv/config-per-group/
+    state: directory
+
+- name: Configure ocserv routes for each group
+  template:
+    dest: '/etc/ocserv/config-per-group/{{ item.key }}'
+    src: ocserv-group.j2
+  loop: '{{ vpn.routes | dict2items }}'
+  notify: restart ocserv
+
+- name: Create ocserv service override directory
+  file:
+    path: /etc/systemd/system/ocserv.service.d
+    state: directory
+    owner: root
+    group: root
+    mode: 0755
+
+- name: Set ocserv to start after network is online
+  copy:
+    dest: /etc/systemd/system/ocserv.service.d/override.conf
+    content: |
+      [Unit]
+      After=network-online.target
+      Wants=network-online.target
+  notify: reload systemd
+
+- name: Enable IP forwarding
+  sysctl:
+    name: net.ipv4.ip_forward
+    value: 1
+    sysctl_file: /etc/sysctl.d/99-local.conf
+    sysctl_set: true

roles/ocserv/templates/ocserv-group.j2

@@ -0,0 +1,3 @@
+{% for route in item.value %}
+route = {{ route }}
+{% endfor %}

roles/ocserv/templates/ocserv.conf.j2

@@ -0,0 +1,26 @@
+listen-host = {{ dns_name }}
+tcp-port = 443
+server-cert = /etc/letsencrypt/live/{{ dns_name }}/fullchain.pem
+server-key = /etc/letsencrypt/live/{{ dns_name }}/privkey.pem
+
+run-as-user = ocserv
+run-as-group = ocserv
+socket-file = /run/ocserv-socket
+chroot-dir = /var/lib/ocserv
+connect-script = /usr/local/bin/ocserv-script
+disconnect-script = /usr/local/bin/ocserv-script
+
+device = vpns
+cisco-client-compat = true
+dtls-legacy = true
+compression = true
+isolate-workers = true
+
+auth = certificate
+ca-cert = /etc/ocserv/ca.crt
+cert-user-oid = 2.5.4.3
+cert-group-oid = 2.5.4.11
+config-per-group = /etc/ocserv/config-per-group/
+default-domain = {{ domain }}
+ipv4-network = {{ vpn.network }}
+route = {{ vpn.network }}

roles/reverse-proxy/meta/main.yml

@@ -0,0 +1,2 @@
+dependencies:
+  - role: nginx

roles/synapse/meta/main.yml

@@ -0,0 +1,2 @@
+dependencies:
+  - role: nginx

roles/unifi/meta/main.yml

@@ -0,0 +1,2 @@
+dependencies:
+  - role: nginx

setup.yml

@@ -41,32 +41,25 @@
 
 - hosts: doc
   roles:
-    - nginx
-    - nginx-php
     - dokuwiki
 
 - hosts: git
   roles:
-    - nginx
     - forgejo
 
 - hosts: kanboard
   roles:
-    - nginx
-    - nginx-php
     - kanboard
 
 - hosts: matrix
   roles:
     - postgres
-    - nginx
     - synapse
   vars:
     user: synapse
 
 - hosts: monitor
   roles:
-    - nginx
     - influxdb
     - grafana
 
@@ -74,23 +67,23 @@
   roles:
     - postgres
     - redis
-    - nginx
     - netbox
   vars:
     user: netbox
 
 - hosts: unifi
   roles:
-    - nginx
     - unifi
 
+- hosts: vrata
+  roles:
+    - ocserv
+
 - hosts: web-front
   roles:
-    - nginx
     - reverse-proxy
 
 - hosts: zid
   roles:
     - opensmtpd
-    - nginx
     - friwall