From fd5b5c096e109af640ba718dc71c1a97911146dd Mon Sep 17 00:00:00 2001
From: Tim de Pater <git@trafex.nl>
Date: Thu, 18 Feb 2016 11:40:48 +0100
Subject: [PATCH] Made the upstream host/port a environment variable

---
 docker-compose.yml | 3 +++
 nginx/Dockerfile   | 6 ++++++
 nginx/nginx.conf   | 2 +-
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/docker-compose.yml b/docker-compose.yml
index e38cf2b..4edb78c 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -14,3 +14,6 @@ nginx:
         - appdata
     ports:
         - 80:80
+    environment:
+    - UPSTREAM_HOST=fpm
+    - UPSTREAM_PORT=9000
diff --git a/nginx/Dockerfile b/nginx/Dockerfile
index 8749058..efdcb2f 100644
--- a/nginx/Dockerfile
+++ b/nginx/Dockerfile
@@ -1,3 +1,9 @@
 FROM nginx:1.9
 
 COPY nginx.conf /etc/nginx/conf.d/app.conf
+
+CMD /bin/bash -c envsubst < /etc/nginx/conf.d/app.conf.template > /etc/nginx/conf.d/app.conf && nginx -g 'daemon off;'
+
+CMD sed -i 's/UPSTREAM_HOST/'"$UPSTREAM_HOST"'/g' /etc/nginx/conf.d/app.conf \
+ && sed -i 's/UPSTREAM_PORT/'"$UPSTREAM_PORT"'/g' /etc/nginx/conf.d/app.conf \
+ && nginx -g 'daemon off;'
diff --git a/nginx/nginx.conf b/nginx/nginx.conf
index 92717cc..b6f72b8 100644
--- a/nginx/nginx.conf
+++ b/nginx/nginx.conf
@@ -36,7 +36,7 @@ server {
 	location ~ \.php$ {
         try_files $uri =404;
 		fastcgi_split_path_info ^(.+\.php)(/.+)$;
-		fastcgi_pass  fpm:9000;
+		fastcgi_pass  UPSTREAM_HOST:UPSTREAM_PORT;
 		fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
         fastcgi_param SCRIPT_NAME $fastcgi_script_name;
 		fastcgi_index index.php;