Subnet discovery match by dbus-id on vsphere infra

Hello,

Sorry for my bad english

We are evaluating open-audit (community-version 1.12.8.1) on a vmWare iinfrastructure. We use the VM cloning feature very often...

When we use the "Discovy device" with a "device IP" as a subnet format (ie 192.16.1.1-10, by example), we don't see all the relative devices. In "Debug mode", we have the following logs :

First device

...
LOG   - SSH command 'timeout 5m sshpass ssh -oStrictHostKeyChecking=no -oConnectTimeout=10 -oUserKnownHostsFile=/dev/null 'visadmin'@192.168.0.1 'cat /var/lib/dbus/machine-id'' on 192.168.0.1 succeeded
...
DEBUG - dbus_identifier: 3bd894e3dfbd9912428e28b95630b59d
...
LOG   - SSH insert for 192.168.0.1
LOG   - System insert start for 192.168.0.1 (pro-umvroutr-01)
LOG   - System insert end for 192.168.0.1 (pro-umvroutr-01) (System ID 1304)

==> It's OK

But, next, a second device is processing, and we see :

...
LOG   - SSH command 'timeout 5m sshpass ssh -oStrictHostKeyChecking=no -oConnectTimeout=10 -oUserKnownHostsFile=/dev/null 'visadmin'@192.168.0.4 'cat /var/lib/dbus/machine-id'' on 192.168.0.4 succeeded
...
DEBUG - dbus_identifier: 3bd894e3dfbd9912428e28b95630b59d
...
DEBUG - Command Output:
Array
(
    [0] => 3bd894e3dfbd9912428e28b95630b59d
)


LOG   - Start DNS checking for 192.168.0.4
LOG   - Finish DNS checking for 192.168.0.4
LOG   - HIT on dbus_identifier for 192.168.0.4 (System ID 1304)
LOG   - Returning System ID 1304 for 192.168.0.4

So, the script update the device with System ID 1304 (instead of inserting it in DB), because this device "HIT on dbus-identifer"

As far that we know, it's not recomended to change this dbus-identifier (see https://dbus.freedesktop.org/doc/dbus-uuidgen.1.html) :

If you try to change an existing machine-id on a running system, it will probably result in bad things happening

So, is it possible to deactivate this matching on dbus identifier somewhere ? In the config page, we don't have seen anything about that...

Thank you...

Regards
Padou

Subnet discovery match by dbus-id on vsphere infra

1 answer