From 2b41ab4def6bdab7c475cae16e3ba7e208fcaa17 Mon Sep 17 00:00:00 2001
From: Johannes Schickling <schickling.j@gmail.com>
Date: Sun, 19 Jun 2016 16:21:28 +0200
Subject: [PATCH] better nginx config

---
 nginx-envtpl/README.md     | 61 +++++++++++++++++++++++++++++++++++++-
 nginx-envtpl/entrypoint.sh |  6 +++-
 2 files changed, 65 insertions(+), 2 deletions(-)

diff --git a/nginx-envtpl/README.md b/nginx-envtpl/README.md
index 068e6e7..336aea8 100644
--- a/nginx-envtpl/README.md
+++ b/nginx-envtpl/README.md
@@ -50,4 +50,63 @@ http {
     }
 
 }
-```
\ No newline at end of file
+```
+
+### Alternative: Template via `$NGINX_CONFIG_TEMPLATE` environment variable
+
+Instead of mounting a `nginx.conf.tpl` file via a volume, you can also pass in the template via the `$NGINX_CONFIG_TEMPLATE` environment variable.
+
+Here is an `docker-compose.yml` example segment:
+
+
+```yaml
+proxy:
+  image: schickling/nginx-envtpl
+  environment:
+    NGINX_WORKER_RLIMIT_NOFILE: 96000
+    NGINX_WORKER_CONNECTIONS: 10000
+    NGINX_BACKLOG: 10000
+    NGINX_PROXY_ADDR: "http://example.com/"
+    NGINX_CONFIG_TEMPLATE: >
+      worker_processes auto;
+      worker_rlimit_nofile {{ NGINX_WORKER_RLIMIT_NOFILE }};
+      error_log /dev/stdout info;
+
+      events {
+          worker_connections {{ NGINX_WORKER_CONNECTIONS }};
+          use epoll;
+          multi_accept on;
+      }
+
+      http {
+
+          proxy_cache_path /tmp/nginx levels=1:2 keys_zone=my_zone:10m inactive=60m;
+
+          access_log /dev/stdout;
+
+          server {
+
+              listen 80 backlog={{ NGINX_BACKLOG }};
+              root /usr/share/nginx/html/;
+              index index.html;
+
+              server_name localhost;
+
+              charset utf-8;
+
+              location / {
+                  proxy_pass {{ NGINX_PROXY_ADDR }};
+                  proxy_cache my_zone;
+                  proxy_cache_methods POST;
+                  proxy_cache_key "$request_uri|$request_body";
+                  proxy_cache_valid 5s;
+                  proxy_cache_use_stale error timeout updating;
+
+                  add_header X-Proxy-Cache $upstream_cache_status;
+              }
+          }
+
+      }
+  ports:
+    - "80:80"
+```
diff --git a/nginx-envtpl/entrypoint.sh b/nginx-envtpl/entrypoint.sh
index b3dfda1..c271c2e 100755
--- a/nginx-envtpl/entrypoint.sh
+++ b/nginx-envtpl/entrypoint.sh
@@ -1,5 +1,9 @@
 #!/bin/sh
 
-envtpl /etc/nginx/nginx.conf.tpl
+if [[ ! -z $NGINX_CONFIG_TEMPLATE ]]; then
+  envtpl < $NGINX_CONFIG_TEMPLATE > /etc/nginx/nginx.conf
+else
+  envtpl /etc/nginx/nginx.conf.tpl
+fi
 
 exec "$@"