library/roles/nginx: Add a configuration snippet to support websocket reverse proxy.

nginx/defaults/main.yml

@@ -35,6 +35,7 @@ nginx_ldap_base_dn: "dc=example,dc=org"
 # nginx_ldap_login_attribute: uid
 # nginx_ldap_pam_groupdn:
 nginx_letsencrypt_managed: True
+nginx_websockets_support: False
 
 # Virtualhost example
 # nginx_virthosts:

nginx/tasks/nginx.yml

@@ -31,3 +31,9 @@
   notify: Reload nginx
   tags: [ 'nginx', 'nginx_conf' ]
 
+- name: Install websockets configuration if enabled
+  template: src=nginx-websockets.conf.j2 dest=/etc/nginx/conf.d/websockets.conf owner=root group=root mode=0444
+  when: nginx_websockets_support
+  notify: Reload nginx
+  tags: [ 'nginx', 'nginx_conf' ]
+

nginx/templates/nginx-websockets.conf.j2

@@ -0,0 +1,4 @@
+map $http_upgrade $connection_upgrade {
+    default upgrade;
+    ''      close;
+}