Set the ulimit in the init script with a way to override the limit

Fix #916

CHANGELOG.md

@@ -6,6 +6,8 @@
   right content type in the response when compression is enabled
 - [Issue #722](https://github.com/influxdb/influxdb/issues/722). Add
   an install target to the Makefile
+- [Issue #916](https://github.com/influxdb/influxdb/issues/916). Set
+  ulimit in the init script with a way to override it in /etc/default/influxdb
 
 ## v0.8.3 [2014-09-24]
 

scripts/init.sh

@@ -17,10 +17,29 @@
 # In the third case we have to define our own functions which are very dumb
 # and expect the args to be positioned correctly.
 
-if [ -e /lib/lsb/init-functions ]; then
+if [ -r /lib/lsb/init-functions ]; then
     source /lib/lsb/init-functions
 fi
 
+DEFAULT=/etc/default/influxdb
+
+if [ -r $DEFAULT ]; then
+    source $DEFAULT
+fi
+
+if [ "x$NOFILES" == "x" ]; then
+    NOFILES=0
+fi
+
+if [ $NOFILES -le 0 ]; then
+    NOFILES=4096
+fi
+
+echo "Setting ulimit -n $NOFILES"
+if ! ulimit -n $NOFILES >/dev/null 2>&1; then
+    echo -n "Cannot set the max number of open file descriptors"
+fi
+
 function pidofproc() {
     if [ $# -ne 3 ]; then
         echo "Expected three arguments, e.g. $0 -p pidfile daemon-name"