reverse-proxy/rp/nginx.tmpl

{{ $CurrentContainer := where $ "ID" .Docker.CurrentContainerID | first }}

{{ define "upstream" }}
	{{ if .Address }}
		{{/* If we got the containers from swarm and this container's port is published to host, use host IP:PORT */}}
		{{ if and .Container.Node.ID .Address.HostPort }}
			# {{ .Container.Node.Name }}/{{ .Container.Name }}
			server {{ .Container.Node.Address.IP }}:{{ .Address.HostPort }};
		{{/* If there is no swarm node or the port is not published on host, use container's IP:PORT */}}
		{{ else if .Network }}
			# {{ .Container.Name }}
			server {{ .Network.IP }}:{{ .Address.Port }};
		{{ end }}
	{{ else if .Network }}
		# {{ .Container.Name }}
		{{ if .Network.IP }}
			server {{ .Network.IP }} down;
		{{ else }}
			server 127.0.0.1 down;
		{{ end }}
	{{ end }}

{{ end }}

# If we receive X-Forwarded-Proto, pass it through; otherwise, pass along the
# scheme used to connect to this server
map $http_x_forwarded_proto $proxy_x_forwarded_proto {
  default $http_x_forwarded_proto;
  ''      $scheme;
}

# If we receive X-Forwarded-Port, pass it through; otherwise, pass along the
# server port the client connected to
map $http_x_forwarded_port $proxy_x_forwarded_port {
  default $http_x_forwarded_port;
  ''      $server_port;
}

# If we receive Upgrade, set Connection to "upgrade"; otherwise, delete any
# Connection header that may have been passed to this server
map $http_upgrade $proxy_connection {
  default upgrade;
  '' close;
}

# Apply fix for very long server names
server_names_hash_bucket_size 128;

# Default dhparam
{{ if (exists "/etc/nginx/dhparam/dhparam.pem") }}
ssl_dhparam /etc/nginx/dhparam/dhparam.pem;
{{ end }}

# Set appropriate X-Forwarded-Ssl header
map $scheme $proxy_x_forwarded_ssl {
  default off;
  https on;
}

gzip_types text/plain text/css application/javascript application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;

log_format vhost '$host $remote_addr - $remote_user [$time_local] '
                 '"$request" $status $body_bytes_sent '
                 '"$http_referer" "$http_user_agent" '
                 '"$http_dnt"';

access_log off;

{{ if $.Env.RESOLVERS }}
resolver {{ $.Env.RESOLVERS }};
{{ end }}

{{ if (exists "/etc/nginx/proxy.conf") }}
include /etc/nginx/proxy.conf;
{{ else }}
# HTTP 1.1 support
proxy_http_version 1.1;
proxy_buffering off;
proxy_set_header Host $http_host;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $proxy_connection;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $proxy_x_forwarded_proto;
proxy_set_header X-Forwarded-Ssl $proxy_x_forwarded_ssl;
proxy_set_header X-Forwarded-Port $proxy_x_forwarded_port;

# Mitigate httpoxy attack (see README for details)
proxy_set_header Proxy "";
{{ end }}

{{ $enable_ipv6 := eq (or ($.Env.ENABLE_IPV6) "") "true" }}
server {
	server_name _; # This is just an invalid value which will never trigger on a real hostname.
	listen 80;
	{{ if $enable_ipv6 }}
	listen [::]:80;
	{{ end }}
	access_log /var/log/nginx/access.log vhost;
	return 302 https://{{ $.Env.ERROR_WEBSITE }};
}

{{ $error_page_cert := printf "/etc/nginx/certs/" $.Env.ERROR_WEBSITE ".crt" }}
{{ $error_page_key := printf "/etc/nginx/certs/" $.Env.ERROR_WEBSITE ".key" }}

{{ if (and (exists $error_page_cert) (exists $error_page_key)) }}
server {
	server_name _; # This is just an invalid value which will never trigger on a real hostname.
	listen 443 ssl http2;
	{{ if $enable_ipv6 }}
	listen [::]:443 ssl http2;
	{{ end }}
	access_log /var/log/nginx/access.log vhost;
	return 302 https://{{ $.Env.ERROR_WEBSITE }};

	ssl_session_tickets off;
	ssl_certificate {{ $error_page_cert }};
	ssl_certificate_key {{ $error_page_key }};
}
{{ end }}

{{ range $host, $containers := groupByMulti $ "Env.VIRTUAL_HOST" "," }}

{{ $host := trim $host }}
{{ $is_regexp := hasPrefix "~" $host }}
{{ $upstream_name := when $is_regexp (sha1 $host) $host }}

# {{ $host }}
upstream {{ $upstream_name }} {

{{ range $container := $containers }}
	{{ $addrLen := len $container.Addresses }}

	{{ range $knownNetwork := $CurrentContainer.Networks }}
		{{ range $containerNetwork := $container.Networks }}
			{{ if (and (ne $containerNetwork.Name "ingress") (or (eq $knownNetwork.Name $containerNetwork.Name) (eq $knownNetwork.Name "host"))) }}
				## Can be connected with "{{ $containerNetwork.Name }}" network

				{{/* If only 1 port exposed, use that */}}
				{{ if eq $addrLen 1 }}
					{{ $address := index $container.Addresses 0 }}
					{{ template "upstream" (dict "Container" $container "Address" $address "Network" $containerNetwork) }}
				{{/* If more than one port exposed, use the one matching VIRTUAL_PORT env var, falling back to standard web port 80 */}}
				{{ else }}
					{{ $port := coalesce $container.Env.VIRTUAL_PORT "80" }}
					{{ $address := where $container.Addresses "Port" $port | first }}
					{{ template "upstream" (dict "Container" $container "Address" $address "Network" $containerNetwork) }}
				{{ end }}
			{{ else }}
				# Cannot connect to network of this container
				server 127.0.0.1 down;
			{{ end }}
		{{ end }}
	{{ end }}
{{ end }}
}

{{ $default_host := or ($.Env.DEFAULT_HOST) "" }}

# https://golang.org/pkg/text/template/
# A variable's scope extends to the "end" action of the control structure ("if", "with", or "range") in which it is declared, or to the end of the template if there is no such control structure. A template invocation does not inherit variables from the point of its invocation.
{{ $running := first $containers }}
{{ $running := $running.State.Running }}

{{ $default_server := index (dict $host "" $default_host "default_server") $host }}

{{/* Get the VIRTUAL_PROTO defined by containers w/ the same vhost, falling back to "http" */}}
{{ $proto := trim (or (first (groupByKeys $containers "Env.VIRTUAL_PROTO")) "http") }}

{{/* Get the NETWORK_ACCESS defined by containers w/ the same vhost, falling back to "external" */}}
{{ $network_tag := or (first (groupByKeys $containers "Env.NETWORK_ACCESS")) "external" }}

{{/* Get the HTTPS_METHOD defined by containers w/ the same vhost, falling back to "redirect" */}}
{{ $https_method := or (first (groupByKeys $containers "Env.HTTPS_METHOD")) "redirect" }}

{{/* Get the SSL_POLICY defined by containers w/ the same vhost, falling back to "Mozilla-Intermediate" */}}
{{ $ssl_policy := or (first (groupByKeys $containers "Env.SSL_POLICY")) "Mozilla-Intermediate" }}

{{/* Get the HSTS defined by containers w/ the same vhost, falling back to "max-age=31536000" */}}
{{ $hsts := or (first (groupByKeys $containers "Env.HSTS")) "max-age=31536000" }}

{{/* Get the VIRTUAL_ROOT By containers w/ use fastcgi root */}}
{{ $vhost_root := or (first (groupByKeys $containers "Env.VIRTUAL_ROOT")) "/var/www/public" }}


{{/* Get the first cert name defined by containers w/ the same vhost */}}
{{ $certName := (first (groupByKeys $containers "Env.CERT_NAME")) }}

{{/* Get the best matching cert  by name for the vhost. */}}
{{ $vhostCert := (closest (dir "/etc/nginx/certs") (printf "%s.crt" $host))}}

{{/* vhostCert is actually a filename so remove any suffixes since they are added later */}}
{{ $vhostCert := trimSuffix ".crt" $vhostCert }}
{{ $vhostCert := trimSuffix ".key" $vhostCert }}

{{/* Use the cert specified on the container or fallback to the best vhost match */}}
{{ $cert := (coalesce $certName $vhostCert) }}

{{ $is_https := (and (ne $https_method "nohttps") (ne $cert "") (exists (printf "/etc/nginx/certs/%s.crt" $cert)) (exists (printf "/etc/nginx/certs/%s.key" $cert))) }}

{{ if $is_https }}

{{ if eq $https_method "redirect" }}
server {
	server_name {{ $host }};
	listen 80 {{ $default_server }};
	{{ if $enable_ipv6 }}
	listen [::]:80 {{ $default_server }};
	{{ end }}
	access_log /var/log/nginx/access.log vhost;
	return 301 https://$host$request_uri;
}
{{ end }}

server {
	server_name {{ $host }};
	listen 443 ssl http2 {{ $default_server }};
	{{ if $enable_ipv6 }}
	listen [::]:443 ssl http2 {{ $default_server }};
	{{ end }}
	access_log /var/log/nginx/access.log vhost;

	{{ if eq $network_tag "internal" }}
	# Only allow traffic from internal clients
	include /etc/nginx/network_internal.conf;
	{{ end }}

	ssl_protocols TLSv1.2 TLSv1.3;
	ssl_ciphers 'TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384';


	ssl_prefer_server_ciphers on;
	ssl_session_timeout 5m;
	ssl_session_cache shared:SSL:50m;
	ssl_session_tickets off;

	ssl_certificate /etc/nginx/certs/{{ (printf "%s.crt" $cert) }};
	ssl_certificate_key /etc/nginx/certs/{{ (printf "%s.key" $cert) }};

	{{ if (exists (printf "/etc/nginx/certs/%s.dhparam.pem" $cert)) }}
	ssl_dhparam {{ printf "/etc/nginx/certs/%s.dhparam.pem" $cert }};
	{{ end }}

	{{ if (exists (printf "/etc/nginx/certs/%s.chain.pem" $cert)) }}
	ssl_stapling on;
	ssl_stapling_verify on;
	ssl_trusted_certificate {{ printf "/etc/nginx/certs/%s.chain.pem" $cert }};
	{{ end }}

	{{ if (not (or (eq $https_method "noredirect") (eq $hsts "off"))) }}
	add_header Strict-Transport-Security "{{ trim $hsts }}" always;
	{{ end }}

	{{ if (exists (printf "/etc/nginx/vhost.d/%s" $host)) }}
	include {{ printf "/etc/nginx/vhost.d/%s" $host }};
	{{ end }}

        {{ if (exists "/etc/nginx/vhost.d/default") }}
	include /etc/nginx/vhost.d/default;
	{{ end }}

        {{ if eq $running true }}
	location / {
		{{ if eq $proto "uwsgi" }}
		include uwsgi_params;
		uwsgi_pass {{ trim $proto }}://{{ trim $upstream_name }};
		{{ else if eq $proto "fastcgi" }}
		root   {{ trim $vhost_root }};
		include fastcgi.conf;
		fastcgi_pass {{ trim $upstream_name }};
		{{ else }}
		proxy_pass {{ trim $proto }}://{{ trim $upstream_name }};
		{{ end }}

		{{ if (exists (printf "/etc/nginx/htpasswd/%s" $host)) }}
		auth_basic	"Restricted {{ $host }}";
		auth_basic_user_file	{{ (printf "/etc/nginx/htpasswd/%s" $host) }};
		{{ end }}
		{{ if (exists (printf "/etc/nginx/vhost.d/%s_location" $host)) }}
		include {{ printf "/etc/nginx/vhost.d/%s_location" $host}};
		{{ else if (exists "/etc/nginx/vhost.d/default_location") }}
		include /etc/nginx/vhost.d/default_location;
		{{ end }}
	}
        {{ else }}
            return 302 https://{{ $.Env.ERROR_WEBSITE }};
        {{ end }}
}

{{ end }}

{{ if or (not $is_https) (eq $https_method "noredirect") }}

server {
	server_name {{ $host }};
	listen 80 {{ $default_server }};
	{{ if $enable_ipv6 }}
	listen [::]:80 {{ $default_server }};
	{{ end }}
	access_log /var/log/nginx/access.log vhost;

	{{ if eq $network_tag "internal" }}
	# Only allow traffic from internal clients
	include /etc/nginx/network_internal.conf;
	{{ end }}

	{{ if (exists (printf "/etc/nginx/vhost.d/%s" $host)) }}
	include {{ printf "/etc/nginx/vhost.d/%s" $host }};
	{{ end }}

        {{ if (exists "/etc/nginx/vhost.d/default") }}
	include /etc/nginx/vhost.d/default;
	{{ end }}

        {{ if eq $running true }}

	location / {
		{{ if eq $proto "uwsgi" }}
		include uwsgi_params;
		uwsgi_pass {{ trim $proto }}://{{ trim $upstream_name }};
		{{ else if eq $proto "fastcgi" }}
		root   {{ trim $vhost_root }};
		include fastcgi.conf;
		fastcgi_pass {{ trim $upstream_name }};
		{{ else }}
		proxy_pass {{ trim $proto }}://{{ trim $upstream_name }};
		{{ end }}
		{{ if (exists (printf "/etc/nginx/htpasswd/%s" $host)) }}
		auth_basic	"Restricted {{ $host }}";
		auth_basic_user_file	{{ (printf "/etc/nginx/htpasswd/%s" $host) }};
		{{ end }}
		{{ if (exists (printf "/etc/nginx/vhost.d/%s_location" $host)) }}
		include {{ printf "/etc/nginx/vhost.d/%s_location" $host}};
		{{ else if (exists "/etc/nginx/vhost.d/default_location") }}
		include /etc/nginx/vhost.d/default_location;
		{{ end }}
	}
        {{ else }}
            return 302 https://{{ $.Env.ERROR_WEBSITE }};
        {{ end }}
}

{{ if (and (not $is_https) (exists "/etc/nginx/certs/default.crt") (exists "/etc/nginx/certs/default.key")) }}
server {
	server_name {{ $host }};
	listen 443 ssl http2 {{ $default_server }};
	{{ if $enable_ipv6 }}
	listen [::]:443 ssl http2 {{ $default_server }};
	{{ end }}
	access_log /var/log/nginx/access.log vhost;
	return 500;

	ssl_certificate /etc/nginx/certs/default.crt;
	ssl_certificate_key /etc/nginx/certs/default.key;
}
{{ end }}

{{ end }}
{{ end }}