add IF EXISTS to DROP DATABASE statememnts,

make sure sudo is installed (prevents errors on miminal LXC installs),

stack.sh

@@ -23,6 +23,10 @@ if ! grep -q natty /etc/lsb-release; then
     fi
 fi
 
+#The following makes fresh mininmal installs (i.e. LXCs) happy
+apt-get update
+apt-get install -y sudo
+
 # stack.sh keeps the list of **apt** and **pip** dependencies in external
 # files, along with config templates and other useful files.  You can find these
 # in the ``files`` directory (next to this script).  We will reference this
@@ -275,7 +279,7 @@ if [[ "$ENABLED_SERVICES" =~ "g-reg" ]]; then
     mkdir -p $GLANCE_IMAGE_DIR
 
     # (re)create glance database
-    mysql -u$MYSQL_USER -p$MYSQL_PASS -e 'DROP DATABASE glance;' || true
+    mysql -u$MYSQL_USER -p$MYSQL_PASS -e 'DROP DATABASE IF EXISTS glance;'
     mysql -u$MYSQL_USER -p$MYSQL_PASS -e 'CREATE DATABASE glance;'
     # Copy over our glance-registry.conf
     GLANCE_CONF=$GLANCE_DIR/etc/glance-registry.conf
@@ -361,7 +365,7 @@ fi
 
 if [[ "$ENABLED_SERVICES" =~ "mysql" ]]; then
     # (re)create nova database
-    mysql -u$MYSQL_USER -p$MYSQL_PASS -e 'DROP DATABASE nova;' || true
+    mysql -u$MYSQL_USER -p$MYSQL_PASS -e 'DROP DATABASE IF EXISTS nova;'
     mysql -u$MYSQL_USER -p$MYSQL_PASS -e 'CREATE DATABASE nova;'
     $NOVA_DIR/bin/nova-manage db sync
 
@@ -378,7 +382,7 @@ fi
 
 if [[ "$ENABLED_SERVICES" =~ "key" ]]; then
     # (re)create keystone database
-    mysql -u$MYSQL_USER -p$MYSQL_PASS -e 'DROP DATABASE keystone;' || true
+    mysql -u$MYSQL_USER -p$MYSQL_PASS -e 'DROP DATABASE IF EXISTS keystone;'
     mysql -u$MYSQL_USER -p$MYSQL_PASS -e 'CREATE DATABASE keystone;'
 
     # FIXME (anthony) keystone should use keystone.conf.example