I have a
XEN-4.4 server, running an
Ubuntu 14 client with
Samba 4.3.11-Ubuntu active directory.
I manage it using a
Windows 10 client running
Active Directory User and Computers.
I have a backup XEN server, with identical logical volumes configured, and an identical
I installed and configured DRBD to clone the main's XEN server's "SambaADserver" logical volume to the backup XEN server.
DRBDADM_BUILDTAG=GIT-hash:\ 5474c321d80250cc61d851220503fdc739490ce9\ build\ by\ pbuilder@marvin\,\ 2016-01-04\ 12:36:34 DRBDADM_API_VERSION=1 DRBD_KERNEL_VERSION_CODE=0x080403 DRBDADM_VERSION_CODE=0x080902 DRBDADM_VERSION=8.9.2rc1
If I use
dd to manually clone the Samba AD logical volume from the main XEN server to the backup, poweroff "sambaADserver" and then
xl create sambaADserver on the backup - it runs fine and Samba AD works fine.
But with DRBD cloning the logical volume, when I poweroff the main "sambaADserver" and start it on the backup - it seems to start fine (I can login to it,
service samba-ad-dc reports running, etc.) ... however, the domain controller does not seem to work. I.e. when I try to start
Active Directory User and Computers - I get the following error...
If I wait long enough, the error changes to one of "The RPC server is not running" ... instead of the "The server is not operational" message.