Merge pull request #1 from eSailors/limit-cache-size

Make cache size configurable

Author: Qasim Sarfraz

files/nginx.conf

@@ -12,7 +12,7 @@ http {
   keepalive_timeout 65;
   sendfile on;
 
-  proxy_cache_path /cache/cache levels=1:2 keys_zone=cache:16m inactive=1y use_temp_path=off;
+  proxy_cache_path /cache/cache levels=1:2 keys_zone=cache:16m inactive=1y max_size=CACHE_MAX_SIZE use_temp_path=off;
   resolver RESOLVER valid=30s;
 
   # this is necessary for us to be able to disable request buffering in all cases

files/startup.sh

@@ -31,12 +31,16 @@ fi
 UPSTREAM_WITHOUT_PORT=$( echo ${UPSTREAM} | sed -r "s/.*:\/\/(.*):.*/\1/g")
 echo Using resolver $RESOLVER and $UPSTREAM [$(dig +short  ${UPSTREAM_WITHOUT_PORT})] as upstream.
 
+CACHE_MAX_SIZE=${CACHE_MAX_SIZE:-75g}
+echo Using cache max size $CACHE_MAX_SIZE
+
 CONFIG=/usr/local/openresty/nginx/conf/nginx.conf
 
 # Update nginx config
 sed -i -e s!UPSTREAM!"$UPSTREAM"!g $CONFIG
 sed -i -e s!PORT!"$PORT"!g $CONFIG
 sed -i -e s!RESOLVER!"$RESOLVER"!g $CONFIG
+sed -i -e s!CACHE_MAX_SIZE!"$CACHE_MAX_SIZE"!g $CONFIG
 
 # setup ~/.aws directory
 AWS_FOLDER='/root/.aws'