Enable websockets support in nginx.

defaults/main.yml

@@ -279,18 +279,22 @@ grafana_oauth_allow_assign_grafana_admin: false
 # https://grafana.com/docs/grafana/next/setup-grafana/configure-security/configure-authentication/generic-oauth/#jmespath-examples
 grafana_oauth_role_attribute_path: ""
 
+grafana_tls_enabled: false
+grafana_tls_only: "{{ grafana_tls_enabled }}"
 grafana_nginx_virthosts:
   - virthost_name: "{{ ansible_fqdn }}"
     listen: "80"
     server_name: "{{ ansible_fqdn }}"
     server_aliases: ""
     index: index.html
-    ssl_enabled: false
-    ssl_only: false
+    ssl_enabled: "{{ grafana_tls_enabled }}"
+    ssl_only: "{{ grafana_tls_only }}"
     ssl_letsencrypt_certs: "{{ nginx_letsencrypt_managed }}"
     root: "{{ nginx_webroot }}"
     server_tokens: "off"
+    websockets: true
     proxy_standard_setup: true
     proxies:
       - location: /
+        websockets: true
         target: http://localhost:{{ grafana_http_port }};