From 73c4afbd22b2299aa483a926c1227faa563ba17b Mon Sep 17 00:00:00 2001
From: Mike Dillon <mike.dillon@synctree.com>
Date: Sun, 26 Oct 2014 09:19:58 -0700
Subject: [PATCH] Support paths with VIRTUAL_PATH

* Require `dict` and `sha1` function support in docker-gen
---
 nginx.tmpl | 41 +++++++++++++++++++++++++++++++++++++----
 1 file changed, 37 insertions(+), 4 deletions(-)

diff --git a/nginx.tmpl b/nginx.tmpl
index 3aa28f4..6590270 100644
--- a/nginx.tmpl
+++ b/nginx.tmpl
@@ -35,10 +35,9 @@ server {
 	return 503;
 }
 
-{{ range $host, $containers := groupByMulti $ "Env.VIRTUAL_HOST" "," }}
-
-upstream {{ $host }} {
-{{ range $container := $containers }}
+{{ define "upstream" }}
+upstream {{ .Host }}{{ .Suffix }} {
+{{ range $index, $container := .Containers }}
 	{{ $addrLen := len $container.Addresses }}
 	{{/* If only 1 port exposed, use that */}}
 	{{ if eq $addrLen 1 }}
@@ -65,6 +64,20 @@ upstream {{ $host }} {
 	{{ end }}
 {{ end }}
 }
+{{ end }}
+
+{{ range $host, $containers := groupByMulti $ "Env.VIRTUAL_HOST" "," }}
+{{ $paths := groupBy $containers "Env.VIRTUAL_PATH" }}
+{{ $pathCount := len $paths }}
+{{ if eq $pathCount 0 }}
+	{{ template "upstream" dict "Host" $host "Suffix" "" "Containers" $containers }}
+{{ else }}
+	{{ range $path, $containers := $paths }}
+		{{ $sum := sha1 $path }}
+		{{ $suffix := printf "-%s" $sum }}
+		{{ template "upstream" dict "Host" $host "Suffix" $suffix "Containers" $containers }}
+	{{ end }}
+{{ end }}
 
 {{/* Get the first cert name defined by containers w/ the same vhost */}}
 {{ $certName := (first (groupByKeys $containers "Env.CERT_NAME")) }}
@@ -102,18 +115,38 @@ server {
 
 	add_header Strict-Transport-Security "max-age=31536000; includeSubdomains";
 
+	{{ if eq $pathCount 0 }}
 	location / {
 		proxy_pass http://{{ $host }};
 	}
+	{{ else }}
+		{{ range $path, $containers := $paths }}
+			{{ $sum := sha1 $path }}
+			{{ $suffix := printf "-%s" $sum }}
+			location {{ $path }} {
+				proxy_pass http://{{ $host }}{{ $suffix }};
+			}
+		{{ end }}
+	{{ end }}
 }
 {{ else }}
 
 server {
 	server_name {{ $host }};
 
+	{{ if eq $pathCount 0 }}
 	location / {
 		proxy_pass http://{{ $host }};
 	}
+	{{ else }}
+		{{ range $path, $containers := $paths }}
+			{{ $sum := sha1 $path }}
+			{{ $suffix := printf "-%s" $sum }}
+			location {{ $path }} {
+				proxy_pass http://{{ $host }}{{ $suffix }};
+			}
+		{{ end }}
+	{{ end }}
 }
 
 server {