Support paths with VIRTUAL_PATH

nginx.tmpl

@@ -1,3 +1,21 @@
+{{ define "upstream-block" }}
+upstream {{ .Host }}{{ .Suffix }} {
+{{ range $container := .Containers }}
+	{{ $addrLen := len $container.Addresses }}
+	{{/* If only 1 port exposed, use that */}}
+	{{ if eq $addrLen 1 }}
+		{{ $address := index $container.Addresses 0 }}
+		{{ template "upstream" (dict "Container" $container "Address" $address) }}
+	{{/* 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) }}
+	{{ end }}
+{{ end }}
+}
+{{ end }}
+
 {{ define "upstream" }}
 	{{ if .Address }}
 		{{/* If we got the containers from swarm and this container's port is published to host, use host IP:PORT */}}
@@ -15,6 +33,21 @@
 	{{ end }}
 {{ end }}
 
+{{ define "location" }}
+	location {{ .Path }} {
+		proxy_pass {{ .Proto }}://{{ .Host }}{{ .Suffix }};
+		{{ 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 }}
+	}
+{{ 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 {
@@ -71,22 +104,17 @@ server {
 {{ end }}
 
 {{ range $host, $containers := groupByMulti $ "Env.VIRTUAL_HOST" "," }}
-
-upstream {{ $host }} {
-{{ range $container := $containers }}
-	{{ $addrLen := len $container.Addresses }}
-	{{/* If only 1 port exposed, use that */}}
-	{{ if eq $addrLen 1 }}
-		{{ $address := index $container.Addresses 0 }}
-		{{ template "upstream" (dict "Container" $container "Address" $address) }}
-	{{/* 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) }}
+{{ $paths := groupBy $containers "Env.VIRTUAL_PATH" }}
+{{ $pathCount := len $paths }}
+{{ if eq $pathCount 0 }}
+	{{ template "upstream-block" dict "Host" $host "Suffix" "" "Containers" $containers }}
+{{ else }}
+	{{ range $path, $containers := $paths }}
+		{{ $sum := sha1 $path }}
+		{{ $suffix := printf "-%s" $sum }}
+		{{ template "upstream-block" dict "Host" $host "Suffix" $suffix "Containers" $containers }}
 	{{ end }}
 {{ end }}
-}
 
 {{ $default_host := or ($.Env.DEFAULT_HOST) "" }}
 {{ $default_server := index (dict $host "" $default_host "default_server") $host }}
@@ -143,18 +171,13 @@ server {
 	include /etc/nginx/vhost.d/default;
 	{{ end }}
 
-	location / {
-		proxy_pass {{ $proto }}://{{ $host }};
-		{{ 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 }}
-	}
+	{{ if eq $pathCount 0 }}
+	{{ template "location" (dict "Path" "/" "Proto" $proto "Host" $host "Suffix" "" ) }}
+	{{ else }}
+	{{ range $path, $containers := $paths }}
+	{{ template "location" (dict "Path" $path "Proto" $proto "Host" $host "Suffix" (printf "-%s" (sha1 $path)) ) }}
+	{{ end }}
+	{{ end }}
 }
 {{ else }}
 
@@ -169,18 +192,13 @@ server {
 	include /etc/nginx/vhost.d/default;
 	{{ end }}
 
-	location / {
-		proxy_pass {{ $proto }}://{{ $host }};
-		{{ 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 }}
-	}
+	{{ if eq $pathCount 0 }}
+	{{ template "location" (dict "Path" "/" "Proto" $proto "Host" $host "Suffix" "" ) }}
+	{{ else }}
+	{{ range $path, $containers := $paths }}
+	{{ template "location" (dict "Path" $path "Proto" $proto "Host" $host "Suffix" (printf "-%s" (sha1 $path)) ) }}
+	{{ end }}
+	{{ end }}
 }
 
 {{ if (and (exists "/etc/nginx/certs/default.crt") (exists "/etc/nginx/certs/default.key")) }}