{# helper variables and per-site defaults that we can't set in role defaults #}
{% set domain_name       = item.domain_name %}
{# assume HSTS is off unless a vhost explicitly sets it to "yes" #}
{% set enable_hsts       = item.enable_hsts | default("no") %}

    {# first, check if the current vhost has a custom cert (perhaps self-signed) #}
    {% if item.tls_certificate_path is defined and item.tls_key_path is defined %}

    # concatenated key + cert
    # See: http://nginx.org/en/docs/http/configuring_https_servers.html
    ssl_certificate {{ item.tls_certificate_path }};
    ssl_certificate_key {{ item.tls_key_path }};

    {# otherwise, assume host is using letsencrypt #}
    {% else %}

    # concatenated key + cert
    # See: http://nginx.org/en/docs/http/configuring_https_servers.html
    ssl_certificate {{ letsencrypt_root }}/{{ domain_name }}/fullchain.pem;
    ssl_certificate_key {{ letsencrypt_root }}/{{ domain_name }}/privkey.pem;

    {% endif %}

    ssl_session_timeout {{ nginx_ssl_session_timeout }};
    ssl_session_cache {{ nginx_ssl_session_cache }};
    ssl_buffer_size {{ nginx_ssl_buffer_size }};

    ssl_dhparam {{ nginx_ssl_dhparam }};
    ssl_protocols {{ nginx_ssl_protocols }};
    ssl_ciphers "{{ tls_cipher_suite }}";
    ssl_prefer_server_ciphers on;

    {# OSCP stapling only works with real certs #}
    {% if use_letsencrypt == "yes" or item.tls_certificate_path %}
    # OCSP stapling...
    ssl_stapling on;
    ssl_stapling_verify on;
    {% if linode_id is defined %}
    # use Linode internal DNS
    resolver 139.162.139.5 139.162.130.5 [2a01:7e01::5] [2a01:7e01::6];
    {% else %}
    resolver 8.8.8.8 8.8.4.4 [2001:4860:4860::8844] [2001:4860:4860::8888];
    {% endif %} {# end: linode_id #}
    {% endif %} {# end: use_letsencrypt #}

    # nginx does not auto-rotate session ticket keys: only a HUP / restart will do so and
    # when a restart is performed the previous key is lost, which resets all previous
    # sessions. The fix for this is to setup a manual rotation mechanism:
    # http://trac.nginx.org/nginx/changeset/1356a3b9692441e163b4e78be4e9f5a46c7479e9/nginx
    #
    # Note that you'll have to define and rotate the keys securely by yourself. In absence
    # of such infrastructure, consider turning off session tickets:
    ssl_session_tickets off;

    {% if enable_hsts == "yes" %}
    # Enable this if you want HSTS (recommended, but be careful)
    # Include all subdomains and indicate to Google that we want this pre-loaded in Chrome's HSTS store
    # See: https://hstspreload.appspot.com/
    add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload" always;
    {% endif %}