From 915cdc343dc1e0a5f3a159ab00c831b32dea5285 Mon Sep 17 00:00:00 2001
From: Christian Schuster <christian.schuster@eforce21.com>
Date: Sun, 10 Jun 2018 23:33:54 +0200
Subject: [PATCH] allow overriding the default access log and error log
 locations

---
 README.md          |  4 ++++
 docker-compose.yml |  6 ++++++
 run.sh             | 13 +++++++++++++
 3 files changed, 23 insertions(+)

diff --git a/README.md b/README.md
index f78516c..9a1985a 100644
--- a/README.md
+++ b/README.md
@@ -24,6 +24,10 @@ A very simple container to redirect HTTP traffic to another server, based on `ng
     - useful if client should not change the request method from POST to GET
     - if not set or not in allowed Codes `SERVER_REDIRECT_CODE` is used
     - so per default all requests will be redirected with the same status code
+- `SERVER_ACCESS_LOG` - optionally define the location where nginx will write its access log
+   - if not set /dev/stdout is used
+- `SERVER_ERROR_LOG` - optionally define the location where nginx will write its error log
+   - if not set /dev/stderr is used
 
 See also `docker-compose.yml` file.
 
diff --git a/docker-compose.yml b/docker-compose.yml
index 15e2b17..ff5ac86 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -16,3 +16,9 @@ to:
     # optionally define the http code to redirect POST requests
     # if not set or not in allowed Codes, SERVER_REDIRECT_CODE will be used
     #- SERVER_REDIRECT_POST_CODE=
+    # optionally define the location for the nginx access log
+    # if not set /dev/stdout is used
+    #- SERVER_ACCESS_LOG=/dev/null
+    # optionally define the location for the nginx error log
+    # if not set /dev/stderr is used
+    #- SERVER_ERROR_LOG=/dev/null
diff --git a/run.sh b/run.sh
index 6391a7b..9bc62dd 100644
--- a/run.sh
+++ b/run.sh
@@ -27,6 +27,16 @@ if [ ! -n "$SERVER_REDIRECT_SCHEME" ] ; then
     SERVER_REDIRECT_SCHEME='$scheme'
 fi
 
+# set access log location from optional ENV var
+if [ ! -n "$SERVER_ACCESS_LOG" ] ; then
+    SERVER_ACCESS_LOG='/dev/stdout'
+fi
+
+# set error log location from optional ENV var
+if [ ! -n "$SERVER_ERROR_LOG" ] ; then
+    SERVER_ERROR_LOG='/dev/stderr'
+fi
+
 sed -i "s|\${SERVER_REDIRECT}|${SERVER_REDIRECT}|" /etc/nginx/conf.d/default.conf
 sed -i "s|\${SERVER_NAME}|${SERVER_NAME}|" /etc/nginx/conf.d/default.conf
 sed -i "s|\${SERVER_REDIRECT_CODE}|${SERVER_REDIRECT_CODE}|" /etc/nginx/conf.d/default.conf
@@ -34,4 +44,7 @@ sed -i "s|\${SERVER_REDIRECT_POST_CODE}|${SERVER_REDIRECT_POST_CODE}|" /etc/ngin
 sed -i "s|\${SERVER_REDIRECT_PATH}|${SERVER_REDIRECT_PATH}|" /etc/nginx/conf.d/default.conf
 sed -i "s|\${SERVER_REDIRECT_SCHEME}|${SERVER_REDIRECT_SCHEME}|" /etc/nginx/conf.d/default.conf
 
+ln -sfT "$SERVER_ACCESS_LOG" /var/log/nginx/access.log
+ln -sfT "$SERVER_ERROR_LOG" /var/log/nginx/error.log
+
 exec nginx -g 'daemon off;'