From fff050c71d23a4a076c5f65a567249ea64ace72d Mon Sep 17 00:00:00 2001
From: Jose Diaz-Gonzalez <email@josediazgonzalez.com>
Date: Sat, 16 Apr 2016 17:46:07 -0400
Subject: [PATCH] Warn users when there is a low memory condition on
 installation

Closes #1971

[ci skip]
---
 bootstrap.sh | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/bootstrap.sh b/bootstrap.sh
index 3a7fb2c93..2adc0d85f 100755
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -12,6 +12,7 @@ set -eo pipefail; [[ $TRACE ]] && set -x
 # It also means that we can't run a partially downloaded script.
 
 ensure-environment() {
+  local FREE_MEMORY
   echo "Preparing to install $DOKKU_TAG from $DOKKU_REPO..."
   if ! command -v apt-get &>/dev/null; then
     echo "This installation script requires apt-get. For manual installation instructions, consult http://dokku.viewdocs.io/dokku/advanced-installation/"
@@ -22,6 +23,12 @@ ensure-environment() {
     echo "This installation script requires that you have a hostname set for the instance. Please set a hostname for 127.0.0.1 in your /etc/hosts"
     exit 1
   }
+
+  FREE_MEMORY=$(grep MemTotal /proc/meminfo | awk '{print $2}')
+  if [[ "$FREE_MEMORY" -lt 1003600 ]]; then
+    echo "For dokku to build containers, it is strongly suggested that you have 1024 megabytes or more of free memory"
+    echo "If necessary, please consult this document to setup swap: http://dokku.viewdocs.io/dokku/advanced-installation/#vms-with-less-than-1gb-of-memory"
+  fi
 }
 
 install-requirements() {