nginx: add common role for nginx

esmil:
- disable access log and log errors to syslog (journal really)
  use journalctl -u nginx to see the errors
- hoist some configuration values into ansible variables
- add tags and use a handler to reload nginx on configuration changes
- make nginx do its DNS queries against our local resolved
  this enables nginx to use DNSSEC and DoT
- don't start nginx before the network is up. if it can't do
  dns lookups ssl_stapling will be ignored

1 files changed, 73 insertions, 0 deletions

diff --git a/roles/nginx/templates/nginx.conf.j2 b/roles/nginx/templates/nginx.conf.j2
new file mode 100644
index 0000000..1188e53
--- /dev/null
+++ b/roles/nginx/templates/nginx.conf.j2
@@ -0,0 +1,73 @@
+user www-data;
+worker_processes auto;
+{% if nginx_worker_rlimit_nofile is defined %}
+worker_rlimit_nofile {{ nginx_worker_rlimit_nofile }};
+{% endif %}
+pid /run/nginx.pid;
+error_log /dev/null debug;
+error_log syslog:server=unix:/dev/log,facility=daemon,tag=nginx notice;
+
+include /etc/nginx/modules-enabled/*.conf;
+
+events {
+	worker_connections {{ nginx_worker_connections }};
+	# multi_accept on;
+}
+
+http {
+	##
+	# Basic Settings
+	##
+
+	sendfile on;
+	tcp_nopush on;
+	types_hash_max_size 2048;
+	# server_tokens off;
+
+	# server_names_hash_bucket_size 64;
+	# server_name_in_redirect off;
+
+	include /etc/nginx/mime.types;
+	default_type application/octet-stream;
+
+	##
+	# Resolver
+	##
+
+	resolver 127.0.0.53 valid=30s; # systemd-resolved listens here
+
+	##
+	# SSL Settings
+	##
+
+	ssl_protocols {{ nginx_ssl_protocols }};
+	ssl_ciphers   {{ nginx_ssl_ciphers }};
+	ssl_prefer_server_ciphers off;
+	ssl_dhparam   /etc/nginx/dhparam;
+
+	##
+	# Logging Settings
+	##
+
+	access_log off;
+
+	##
+	# Gzip Settings
+	##
+
+	gzip on;
+
+	# gzip_vary on;
+	# gzip_proxied any;
+	# gzip_comp_level 6;
+	# gzip_buffers 16 8k;
+	# gzip_http_version 1.1;
+	# gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
+
+	##
+	# Virtual Host Configs
+	##
+
+	include /etc/nginx/conf.d/*.conf;
+	include /etc/nginx/sites-enabled/*;
+}