roles/nginx: Add convenience tags to fact task

Instead of manually creating our own self-signed certificate we can
use the one created automatically by the ssl-cert package on Debian.
This is only used by the dummy default HTTPS vhost.

Pipfile.lock

@@ -18,17 +18,17 @@
     "default": {
         "ansible": {
             "hashes": [
-                "sha256:f561cca7fbc4daa14d98e18cd0cb74bd8b173f1501b8fa11543f6ef002de3167"
+                "sha256:737d819ffbd7a80c28795b4edd93e59ad21e6e6d53af0d19f57412814f9260d0"
             ],
             "index": "pypi",
-            "version": "==4.1.0"
+            "version": "==4.2.0"
         },
         "ansible-core": {
             "hashes": [
-                "sha256:7e75827a94d47d1c3e1930d708f0ef637a3ab9a21f757aaf55deab6e9f47c682"
+                "sha256:5ae4c3da765df08ce23f6315a6d48121c0090324fe0a9d305c85f362ff6bcaeb"
             ],
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
-            "version": "==2.11.1"
+            "version": "==2.11.2"
         },
         "cffi": {
             "hashes": [

roles/nginx/tasks/main.yml

@@ -16,8 +16,15 @@
     add_nginx_apt_key is changed or
     add_nginx_apt_repository is changed
 
-- name: Install nginx
-  apt: pkg=nginx cache_valid_time=3600 state=present
+- name: Set nginx packages
+  set_fact:
+    nginx_packages:
+      - nginx
+      - ssl-cert # for ssl-cert-snakeoil.pem in nginx
+  tags: nginx, packages
+
+- name: Install nginx packages
+  apt: pkg={{ nginx_packages }} cache_valid_time=3600 state=present
   tags: nginx, packages
 
 - name: Copy nginx.conf

roles/nginx/tasks/vhosts.yml

@@ -7,11 +7,6 @@
     notify:
       - reload nginx
 
-  - name: Generate self-signed TLS cert
-    command: openssl req -x509 -nodes -sha256 -days 365 -subj "/C=SO/ST=SO/L=snakeoil/O=snakeoil/CN=snakeoil" -newkey rsa:2048 -keyout /etc/ssl/private/nginx-snakeoil.key -out /etc/ssl/certs/nginx-snakeoil.crt -extensions v3_ca creates=/etc/ssl/certs/nginx-snakeoil.crt
-    notify:
-      - reload nginx
-
   - name: Download 4096-bit RFC 7919 dhparams
     get_url:
       url: https://raw.githubusercontent.com/internetstandards/dhe_groups/master/ffdhe4096.pem

roles/nginx/templates/blank-vhost.conf.j2

@@ -16,9 +16,9 @@ server {
     listen [::]:443 ssl http2 default_server;
     server_name _;
 
-    # "snakeoil" certificate (self signed!)
-    ssl_certificate /etc/ssl/certs/nginx-snakeoil.crt;
-    ssl_certificate_key /etc/ssl/private/nginx-snakeoil.key;
+    # self-signed "snakeoil" certificate from ssl-cert package
+    ssl_certificate /etc/ssl/certs/ssl-cert-snakeoil.pem;
+    ssl_certificate_key /etc/ssl/private/ssl-cert-snakeoil.key;
 
     ssl_session_timeout {{ nginx_ssl_session_timeout }};
     ssl_session_cache {{ nginx_ssl_session_cache }};