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From Dmitri Chebotarov <>
Subject Upgrade to VCL 2.3
Date Mon, 20 Aug 2012 17:02:11 GMT

I've upgraded VCL 2.2.1 -> 2.3 on Friday and would like to share issues and fixes:

- right after the upgrade all new reservations failed  (when vcld needed to create new VM).
I traced it to failing scp command on step when VCL copies .vmx file to a VM host. There were
no errors reported in vcld.conf log file and vcld proceeded to next steps. Then error was
reported on VM host when vcld attempted to register a VM with non-existing .vmx file. The
scp command doesn't get any options and silently fails. I've added: 

        if (!defined($options)) {
                $options = " -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null ";

to, sub run_scp_command, before $options are added to $scp_path. I think adding these
options to ~/.ssh/config would give the same result.

- needed to increase ConnectTimeout in Many (but not all) reservations failed with
error 'Connection timed out during banner exchange' when VCL was running ssh commands to prepare
reservation (3 attempts): "/usr/bin/ssh -i /etc/vcl/vcl.key  -o StrictHostKeyChecking=no -o
UserKnownHostsFile=/dev/null -o ConnectionAttempts=1 -o ConnectTimeout=3 -l root -p 22 -x
<vcl-computer-name> 'command' ". I've changed ConnectTimeout to 10. 

- was getting 'undefined usenls' JS error when I clicked 'Connect' button on successful reservation.
'Get RDP File' button wasn't available. This happened b/c I used page.php from VCL 2.2.1,
which doesn't define usenls vars. Once I defined usenls in page.php it fixed the issue (thanks
to Josh who pointed the problem)

- configuring firewall for Windows reservations failed. There is already
for this problem. I've removed lines checking for $exit_status in and will
apply proper fix later with VCL 2.3.1. 

At this point VCL 2.3 runs OK. 

Thank you,

Dmitri Chebotarov
Virtual Computing Lab Systems Engineer, TSD - Ent Servers & Messaging
223 Aquia Building, Ffx, MSN: 1B5
Phone: (703) 993-6175
Fax: (703) 993-3404

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