Adding new (optional) dependency to configure.ac

Signed-off-by: René Nussbaumer <rn@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

INSTALL

@@ -34,6 +34,8 @@ Before installing, please verify that you have the following programs:
   <http://starship.python.net/crew/theller/ctypes/>`_, if running on
   python 2.4 (optional, used for node daemon memory locking)
 - `socat <http://www.dest-unreach.org/socat/>`_
+- `Paramiko <http://www.lag.net/paramiko/>`_, if you want automated SSH
+  setup; optional otherwise but manual setup of the nodes required
 
 These programs are supplied as part of most Linux distributions, so
 usually they can be installed via the standard package manager. Also

configure.ac

@@ -317,6 +317,13 @@ AC_PYTHON_MODULE(pyparsing, t)
 AC_PYTHON_MODULE(pyinotify, t)
 AC_PYTHON_MODULE(pycurl, t)
 
+# This is optional but then we've limited functionality
+AC_PYTHON_MODULE(paramiko)
+if test "$HAVE_PYMOD_PARAMIKO" = "no"; then
+  AC_MSG_WARN([You do not have paramiko installed. While this is optional you
+               have to setup SSH and noded on the joining nodes yourself.])
+fi
+
 AC_CONFIG_FILES([ Makefile ])
 
 AC_OUTPUT