[SAMBA4][PATCH] Add Windows testing to Samba 4 make tests

[Brad Henry]

Hello,

This README file should help to explain what is needed to setup a 
Windows VM for testing using this framework. Let me know if there's 
anything that looks strange or could use clarification.

vm_setup.tar.gz is currently located at the root of my SVN branch, 
svn://svnanon.samba.org/samba/branches/SOC/bnh. I think that locating it 
within the Samba 4 source tree (at source/script/tests/win/) would be a 
good idea, as it would make it more easily accessible. Alternatively, I 
was thinking that a good place for it might be with the build farm 
scripts. However, its usefulness is not restricted to the build farm, as 
'make wintest' could be run manually, if the WINTESTCONF environment 
variable is exported and set to a test_win.conf file customized for that 
site.

Does anyone else have any thoughts about it either way?

Thanks,
Brad

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This project uses a VMware Server hosted Windows guest VM to test the
behaviour of Windows -> Samba and Samba -> Windows interactions. To setup a
Windows host for testing, vm_setup.tar.gz contain some scripts which create
an administrative user account, and enable and start the installed telnet
service on the Windows host. Optionally, the hostname and workgroup name can
also be set. vm_setup.tar.gz is currently located in the SOC/bnh branch of
Samba's SVN repository.

PREREQUISITES

To use these scripts, VMware Server needs to be running with a Windows guest
VM installed, IP addressed, and VMware tools needs to be installed and running
on the guest VM. The Windows OS I used to test with was Windows Server 2003,
but I think this should work with any version of Windows that has the
Microsoft telnet service installed. The VMware Server versions I used for
testing was 1.0.0 build-27828, and 1.0.0 build-28343.

PLEASE NOTE: Due to problems with my original revert_snapshot() code, the initial
setup now requires that the VM configuration setting 'When Powering Off' is
manually set to 'Revert to snapshot' (snapshot.action="autoRevert" in the
guest's .vmx file).  This should not be a permanent change, but the original
revert_snapshot() code I wrote no longer works and i'm not sure why.

On the machine that these scripts are running on (this need not be the same
machine as the VMware host), the VMware perl scripting api needs to be
installed, as well as the vix-perl api. These come with the VMware Server
console package.

After unzipping this file, the libraries are installed by extracting the
VMware-vix-e.x.p-<revision number>.tar.gz and
VMware-VmPerlAPI-e.x.p-<revision number>.tar.gz archives, and running the
vmware-install.pl scripts inside their respective directories.

On Slackware 10.2, I encountered a problem in that when I tried to use the vix
api libraries, I would get the following error:

SSLLoadSharedLibrary: Failed to load library /<client program directory>/libcrypto.so.0.9.7:/<client program directory>/libcrypto.so.0.9.7: cannot open a shared object file: No such file or directory.

The fix found on the VMware knowledge base (search http://kb.vmware.com for
Doc ID: 1837104) states that it's a known problem with the scripting libraries,
and can be resolved by installing VMware Server on the host, which properly
sets up the SSL module loader. This is what I would suggest if you encounter
this, as it solved the problem for me (I don't have VMware Server actually
running on that host though).

INSTALLATION

To use these scripts, modify initial_setup.conf to match your environment. The
GUEST_HOSTNAME, GUEST_WORKGROUP, HOST_SERVER_NAME, HOST_SERVER_PORT,
HOST_USERNAME, and HOST_PASSWORD variables are optional, and are commented out
in this release.

Running initial_setup.sh will:
*  Get the IP address of the Windows guest VM.
*  Take a snapshot of the pristine Windows guest.
*  Copy the windows scripts from the windows-scripts directory on the unix host
        to the directory on the Windows guest specified by the
        GUEST_SCRIPT_PATH option. This path will be created on the guest if
        it does not already exist.
*  Execute win_setup.wsf on the Windows guest in order to create the
        administrator account specified by GUEST_USERNAME and GUEST_PASSWORD,
        enable and start the telnet service, and set the GUEST_HOSTNAME and
        GUEST_WORKGROUP if configured.
*  If these operations are successful so far, another snapshot is taken at this
	point. This is the snapshot which is restored if the tests encounter
	problems they are unable to recover from.

These operations leave the Windows guest in a state such that it can be
remotely administered with telnet. Specifically, this will allow us to use
'make wintest' in Samba 4 to perform smbtorture tests against a Windows host,
and perform tests from a Windows client to a Samba server.

INTEGRATING WITH THE BUILD FARM

Follow the standard steps to add a host to the build farm. The major
difference is that we will need to run these tests as root. To run the
Windows tests in the build farm, a .fns file will need to be created for
your new host that exports a WINTESTCONF environment variable pointing to a
config file used by 'make wintest'. An example of this config file can be
found at source/script/tests/win/test_win.conf in the Samba 4 source tree. 

I've also included the bnhtest.fns file that I'm using for my build farm host
below, as an example. It was modified from generic.fns.

action_test_windows() {
        do_make wintest
        w_status=$?
        echo "WINTEST STATUS: $w_status"
        return $w_status;
}

per_run_hook

system=`uname`

export WINTESTCONF="/home/build/win/test_win.conf"

for compiler in gcc cc icc; do

  # arrgh, "which" gives no err code on solaris
  path=`which $compiler`
  if [ -x "$path" ]; then

    if $compiler -v 2>&1 | grep gcc.version > /dev/null; then
       isgcc=1
       CFLAGS="-Wall"
       export CFLAGS
    else
       CFLAGS=""
       export CFLAGS
       isgcc=0
    fi
    if [ $compiler = gcc -o $isgcc = 0 ]; then

      # only attempt samba4 if we have perl
      if which perl > /dev/null; then
        test_tree samba4 source $compiler configure build install test_windows
      fi
    fi
  fi
done