+# ok, so the logic should be simple, just yum update the world
+# however there are many cases in the real life where this
+# just does not work, because of a glitch somewhere
+# so, we force the update of crucial pkgs independently, as
+# the whole group is sometimes too much to swallow
+# this one is builtin
+CRUCIAL_PACKAGES_BUILTIN=[ 'NodeUpdate' , 'nodemanager' ]
+# and operations can also try to push a list through a conf_file
+# should use the second one for consistency, try the first one as well for legacy
+CRUCIAL_PACKAGES_OPTIONAL_PATH1='/etc/planetlab/NodeUpdate.packages'
+CRUCIAL_PACKAGES_OPTIONAL_PATH2='/etc/planetlab/crucial-rpm-list'
+