From bce619cbf5a720e409de9f05387c10e86586ba26 Mon Sep 17 00:00:00 2001
From: Adam Kocoloski <adam@cloudant.com>
Date: Fri, 27 Aug 2010 12:40:03 -0400
Subject: read Erlang VM arguments from config file

---
 rel/overlay/bin/dbcore  | 20 ++++++--------------
 rel/overlay/etc/vm.args | 22 ++++++++++++++++++++++
 rel/reltool.config      |  3 ++-
 3 files changed, 30 insertions(+), 15 deletions(-)
 create mode 100644 rel/overlay/etc/vm.args

(limited to 'rel')

diff --git a/rel/overlay/bin/dbcore b/rel/overlay/bin/dbcore
index 4ffd69fa..6ada061e 100755
--- a/rel/overlay/bin/dbcore
+++ b/rel/overlay/bin/dbcore
@@ -4,23 +4,15 @@
 
 ERTS_BIN_DIR=$(cd ${0%/*} && pwd)
 
-ROOTDIR=${ERTS_BIN_DIR%/*}
+export ROOTDIR=${ERTS_BIN_DIR%/*}
 
 START_ERL=`cat $ROOTDIR/releases/start_erl.data`
 ERTS_VSN=${START_ERL% *}
 APP_VSN=${START_ERL#* }
 
-BINDIR=$ROOTDIR/erts-$ERTS_VSN/bin
-EMU=beam
-PROGNAME=`echo $0 | sed 's/.*\///'`
-CMD="$BINDIR/erlexec"
+export BINDIR=$ROOTDIR/erts-$ERTS_VSN/bin
+export EMU=beam
+export PROGNAME=`echo $0 | sed 's/.*\///'`
 
-export EMU
-export ROOTDIR
-export BINDIR
-export PROGNAME
-
-exec $CMD -boot $ROOTDIR/releases/$APP_VSN/dbcore \
-    +Bd -noinput -sasl errlog_type error \
-    +A 16 +K true \
-    -name dbcore
+exec $BINDIR/erlexec -boot $ROOTDIR/releases/$APP_VSN/dbcore \
+    -args_file $ROOTDIR/etc/vm.args
diff --git a/rel/overlay/etc/vm.args b/rel/overlay/etc/vm.args
new file mode 100644
index 00000000..29ae50f8
--- /dev/null
+++ b/rel/overlay/etc/vm.args
@@ -0,0 +1,22 @@
+# Each node in the system must have a unique name.  A name can be short
+# (specified using -sname) or it can by fully qualified (-name).  There can be
+# no communication between nodes running with the -sname flag and those running 
+# with the -name flag.
+{{node_name}}
+
+# All nodes must share the same magic cookie for distributed Erlang to work.
+# Comment out this line if you synchronized the cookies by other means (using
+# the ~/.erlang.cookie file, for example).
+-setcookie monster
+
+# Tell SASL not to log progress reports
+-sasl errlog_type error
+
+# Use kernel poll functionality if supported by emulator
++K true
+
+# Start a pool of asynchronous IO threads
++A 16
+
+# Uncomment this line to disable the interactive Erlang shell
+# +Bd -noinput
diff --git a/rel/reltool.config b/rel/reltool.config
index b3386f48..408b3571 100644
--- a/rel/reltool.config
+++ b/rel/reltool.config
@@ -42,5 +42,6 @@
     {copy, "overlay/share"},
     {copy, "../couchjs/build/couchjs", "bin/couchjs"},
     {copy, "../couchjs/build/main.js", "share/couchjs/main.js"},
-    {template, "overlay/etc/default.ini", "etc/default.ini"}
+    {template, "overlay/etc/default.ini", "etc/default.ini"},
+    {template, "overlay/etc/vm.args", "etc/vm.args"}
 ]}.
-- 
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