added generic nginx role

5 files changed, 169 insertions, 0 deletions

diff --git a/roles/nginx/defaults/main.yml b/roles/nginx/defaults/main.yml
new file mode 100644
index 00000000..ae4aa9d4
--- /dev/null
+++ b/roles/nginx/defaults/main.yml
@@ -0,0 +1,13 @@
+---
+nginx_pkg_name: nginx-light
+
+# nginx_vhosts:
+#   example:
+#     template: generic-proxy-no-buffering-with-acme
+#     acme: yes
+#     hostnames:
+#       - example.com
+#       - www.example.com
+#     proxy_pass: http://127.0.0.1:8080
+#   other.io:
+#     contents: "<< nginx vhost config file contents >>"
diff --git a/roles/nginx/handlers/main.yml b/roles/nginx/handlers/main.yml
new file mode 100644
index 00000000..6deed0cd
--- /dev/null
+++ b/roles/nginx/handlers/main.yml
@@ -0,0 +1,5 @@
+---
+- name: restart nginx
+  service:
+    name: nginx
+    state: restarted
diff --git a/roles/nginx/tasks/acme.yml b/roles/nginx/tasks/acme.yml
new file mode 100644
index 00000000..c08c0a57
--- /dev/null
+++ b/roles/nginx/tasks/acme.yml
@@ -0,0 +1,50 @@
+---
+- name: check if acme certs already exist
+  loop: "{{ item.value.hostnames }}"
+  loop_control:
+    loop_var: acme_hostname
+  stat:
+    path: "/var/lib/acme/live/{{ acme_hostname }}"
+  register: acme_cert_stat
+
+- name: set acmecert_missing_hostnames variable
+  set_fact:
+    acmecert_missing_hostnames: "{{ acme_cert_stat.results | acme_cert_nonexistent(item.value.hostnames) }}"
+
+- name: link nonexistent hostnames to self-signed interim cert
+  when: acmecert_missing_hostnames | length > 0
+  block:
+    - name: get id of existing selfsigned interim certificate
+      command: cat /var/lib/acme/.selfsigned-interim-cert
+      changed_when: false
+      check_mode: false
+      register: selfsigned_interim_cert_id
+
+    - name: set selfsigned_interim_cert_id variable
+      set_fact:
+        selfsigned_interim_cert_id: "{{ selfsigned_interim_cert_id.stdout }}"
+
+    - name: link to snakeoil cert for nonexistent hostnames
+      loop: "{{ acmecert_missing_hostnames }}"
+      loop_control:
+        loop_var: acme_missing_hostname
+      file:
+        src: "../certs/{{ selfsigned_interim_cert_id }}"
+        dest: "/var/lib/acme/live/{{ acme_missing_hostname }}"
+        state: link
+
+- name: enable vhost config using acme cert
+  file:
+    src: ../sites-available/liquidtruth
+    dest: /etc/nginx/sites-enabled/liquidtruth
+    state: link
+
+- name: make sure nginx config has been (re)loaded
+  meta: flush_handlers
+
+- name: get certificate using acmetool
+  import_role:
+    name: acmetool/cert
+  vars:
+    acmetool_cert_name: "{{ item.value.hostnames[0] }}"
+    acmetool_cert_hostnames: "{{ item.value.hostnames }}"
diff --git a/roles/nginx/tasks/main.yml b/roles/nginx/tasks/main.yml
new file mode 100644
index 00000000..19791235
--- /dev/null
+++ b/roles/nginx/tasks/main.yml
@@ -0,0 +1,53 @@
+---
+- name: install nginx
+  apt:
+    name: "{{ nginx_pkg_name }}"
+    state: present
+
+- name: remove nginx default config
+  file:
+    name: /etc/nginx/sites-enabled/default
+    state: absent
+  notify: restart nginx
+
+- name: install nginx config snippets
+  loop:
+    - ssl
+    - hsts
+  copy:
+    src: "{{ global_files_dir }}/common/nginx-snippets/{{ item }}.conf"
+    dest: /etc/nginx/snippets/
+  notify: restart nginx
+
+- name: generate Diffie-Hellman parameters
+  openssl_dhparam:
+    path: /etc/ssl/dhparams.pem
+    size: 2048
+  notify: restart nginx
+
+- name: install nginx configs from template
+  loop: "{{ nginx_vhosts | dict2items }}"
+  loop_control:
+    label: "{{ item.key }}"
+  when: "'template' in item.value"
+  template:
+    src: "{{ item.value.template }}.conf.j2"
+    dest: "/etc/nginx/sites-available/{{ item.key }}"
+  notify: restart nginx
+
+- name: install nginx configs from config data
+  loop: "{{ nginx_vhosts | dict2items }}"
+  loop_control:
+    label: "{{ item.key }}"
+  when: "'contents' in item.value"
+  copy:
+    contents: "{{ item.value.contents }}"
+    dest: "/etc/nginx/sites-available/{{ item.key }}"
+  notify: restart nginx
+
+- name: generate acme certificate
+  loop: "{{ nginx_vhosts | dict2items }}"
+  loop_control:
+    label: "{{ item.key }} ({{ item.value.hostnames | join(', ') }})"
+  when: item.value.acme
+  include_tasks: acme.yml
diff --git a/roles/nginx/templates/generic-proxy-no-buffering-with-acme.conf.j2 b/roles/nginx/templates/generic-proxy-no-buffering-with-acme.conf.j2
new file mode 100644
index 00000000..784b2590
--- /dev/null
+++ b/roles/nginx/templates/generic-proxy-no-buffering-with-acme.conf.j2
@@ -0,0 +1,48 @@
+# used for websockets
+# set http_connection to either upgrade or close (as normal)
+map $http_upgrade $connection_upgrade {
+    default upgrade;
+    ''      close;
+}
+
+server {
+    listen 80;
+    listen [::]:80;
+    server_name {{ item.value.hostnames | join(' ') }};
+
+    include snippets/acmetool.conf;
+
+    location / {
+        return 301 https://$host$request_uri;
+    }
+}
+
+server {
+    listen 443 ssl http2;
+    listen [::]:443 ssl http2;
+    server_name {{ item.value.hostnames | join(' ') }};
+
+    include snippets/acmetool.conf;
+    include snippets/ssl.conf;
+    ssl_certificate     /var/lib/acme/live/{{ item.value.hostnames[0] }}/fullchain;
+    ssl_certificate_key /var/lib/acme/live/{{ item.value.hostnames[0] }}/privkey;
+    include snippets/hsts.conf;
+
+    location / {
+        proxy_buffering off;
+        proxy_ignore_headers "X-Accel-Buffering";
+        proxy_request_buffering off;
+        proxy_http_version 1.1;
+
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+
+        # for websockets
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection $connection_upgrade;
+
+        proxy_pass {{ item.value.proxy_pass }};
+    }
+}