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RESOLVED! =) Iâm happy to report Brian McGeorge found a solution, which was kindly passed on to me via Ben Stragnell. The answer is to set the environment variable LOGONSERVER to \\%COMPUTERNAME%. This works by not executing the body of the if statement in: https://cygwin.com/git/gitweb.cgi?p=cygwin-csih.git;a=blob;f=cygwin-service-installation-helper.sh;h=10ab4fb6d47803c9ffabdde51923fc2c3f0496bb;hb=7ca191bebb52ae414bb2a2e37ef22d94f2658dc7#l2884 (lines 2884 to 2890) My working user data now looks like this (note - you need to see both links for context - different parts of the same user data file). * https://github.com/taskcluster/generic-worker/blob/b0786db002921d3ec7d40053ac2e6799679ab290/worker_types/win2012r2/userdata#L4 * https://github.com/taskcluster/generic-worker/blob/b0786db002921d3ec7d40053ac2e6799679ab290/worker_types/win2012r2/userdata#L81-L101 The addition to the powershell script was simply: $env:LOGONSERVER = "\\" + $env:COMPUTERNAME I can confirm this fix works! Thanks again to Brian and Ben. =) Pete > On 03 Oct 2015, at 20:27, Peter Moore <pmoore@mozilla.com> wrote: > > After a little bit more digging, I think the cygwin name is coming from the output of getent here: > > https://cygwin.com/git/gitweb.cgi?p=cygwin-csih.git;a=blob;f=cygwin-service-installation-helper.sh;h=10ab4fb6d47803c9ffabdde51923fc2c3f0496bb;hb=7ca191bebb52ae414bb2a2e37ef22d94f2658dc7#l2705 > > At this point, Iâm not sure what causes getent to return different values when run in automation, and when run manually. I wonder if there is some kind of race condition, such that some subsystem is still updating at the point I install cygwin sshd. > > For reference, this is the powershell script, see lines 77 onwards: > https://hg.mozilla.org/try/file/4905af7c52e5/testing/taskcluster/worker_types/win2012r2/aws_userdata > > Thanks! > Pete > > > >> On 03 Oct 2015, at 19:12, Peter Moore <pmoore@mozilla.com> wrote: >> >> Hi, >> >> I have a powershell script for installing cygwin and setting up sshd which I am using as UserData when firing up a Windows 2012 R2 instance in AWS EC2. >> >> The same command succeeds when run manually, but fails when called from automation. Iâm trying to understand what it is that is different, so I can fix it in automation. >> >> The command called is: >> >> ssh-host-config -y -c 'ntsec mintty' -u 'cygwinsshd' -w 'qwe123QWE!@#' >> >> When I run manually, logged in as Administrator, I get a log line like this (notice the correct âCygwin nameâ): >> >> *** Query: Create new privileged user account 'WIN-EFPDIM0SAUP\cygwinsshd' (Cygwin name: âcygwinsshd')? (yes/no) yes >> >> When I run from automation, the log line looks like this (notice the incorrect âCygwin nameâ): >> >> *** Query: Create new privileged user account 'WIN-EFPDIM0SAUP\cygwinsshd' (Cygwin name: 'win-efpdim0saup+cygwinsshd')? (yes/no) yes >> >> It seems the extended âCygwin nameâ which I get in automation causes ssh-host-config to fail. Iâm trying to establish what causes the cygwin name to get the prefix of the machine name, since this seems to cause the problem. >> >> For reference, below Iâve put the logs in both the successful (manual) case, and the failing (automated) case. >> >> If anyone can point me to the source code of ssh-host-config Iâm also happy to dig - I couldnât find it online. So if youâre not sure, but know where the source is, Iâm happy to look. >> >> Many thanks in advance! >> Pete >> >> >> >> SUCCESSFUL run (when executed manually): >> >> *** Query: Create new privileged user account 'WIN-EFPDIM0SAUP\cygwinsshd' (Cygwin name: âcygwinsshd')? (yes/no) yes >> *** Info: User âcygwinsshd' has been created with password 'qwe123QWE!@#'. >> *** Info: If you change the password, please remember also to change the >> *** Info: password for the installed services which use (or will soon use) >> *** Info: the âcygwinsshd' account. >> >> *** Info: The sshd service has been installed under the âcygwinsshd' >> *** Info: account. To start the service now, call `net start sshd' or >> *** Info: `cygrunsrv -S sshd'. Otherwise, it will start automatically >> *** Info: after the next reboot. >> *** Info: Host configuration finished. Have fun! >> >> >> FAILED run (when called in automation): >> >> *** Query: Create new privileged user account 'WIN-EFPDIM0SAUP\cygwinsshd' (Cygwin name: 'win-efpdim0saup+cygwinsshd')? (yes/no) yes >> *** Info: User 'win-efpdim0saup+cygwinsshd' has been created with password 'qwe123QWE!@#'. >> *** Info: If you change the password, please remember also to change the >> *** Info: password for the installed services which use (or will soon use) >> *** Info: the 'win-efpdim0saup+cygwinsshd' account. >> >> *** Warning: Setting password expiry for user 'win-efpdim0saup+cygwinsshd' failed! >> *** Warning: Please check that password never expires or set it to your needs. >> No user or group 'win-efpdim0saup+cygwinsshd' known. >> *** Warning: Assigning the appropriate privileges to user 'win-efpdim0saup+cygwinsshd' failed! >> *** ERROR: There was a serious problem creating a privileged user. >> >
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