On 30. 3. 2020 15:26, john doe wrote:
On 3/30/2020 1:20 PM, Andrea Bolognani wrote:
On Mon, 2020-03-30 at 12:04 +0200, Michal Prívozník wrote:
On 27. 3. 2020 20:49, john doe wrote:
If my understanding is correct, using 'try06' or 'debian' should do the same thing?
Yes, that is the idea. However, these plugins were not introduced at the same time. I think that especially Debian has delayed libvirt_guest plugin. You can check if both plugins exist:
ls /usr/lib64/libnss_libvirt*
/usr/lib64/libnss_libvirt_guest.so.2 /usr/lib64/libnss_libvirt.so.2
Note that paths are different in Debian-based distros, so the correct ones in this case are actually
/lib/x86_64-linux-gnu/libnss_libvirt.so.2 /lib/x86_64-linux-gnu/libnss_libvirt_guest.so.2
I have upgraded that Buster host to Bullseye, so I have now a 6... version. I have also the above two modules.
I'm still not able to use 'libvirt_guest' though:
--- Guest output (try06):
root@try06:~# cat /etc/hostname try06
--- Host output (host):
root@host:# grep hosts: /etc/ns* hosts: libvirt_guest root@host:# virsh net-dhcp-leases default Expiry Time MAC address Protocol IP address Hostname Client ID or DUID --------------------------------------------------------------------------------------------------------- 2020-03-30 16:03:41 52:54:00:d4:e6:f0 ipv4 192.168.122.137/24 - -
root@host:# getent hosts try06; echo $? 2
What am I missing?
Hold on. 'libvirt_guest' NSS plugin is supposed to translate libvirt names to IP addresses. For instance: virsh start myDomain; ssh myDomain The 'libvirt' NSS plugin is supposed to translate hostnames as sent by guests to IP addresses. These two can be viewed as the following: libvirt_guest: virsh domifaddr --source lease $dom libvirt: virsh net-dhcp-leases $net | grep $hostname And this is where it gets interesting. In your previous e-mails, net-dhcp-leases (aka 'libvirt' plugin) worked because the guest did send hostname when doing DHCP. Now it doesn't (see '-' under 'Hostname' in the output). Therefore, the 'libvirt' NSS plugin won't work. And 'libvirt_guest' translates names of guests as seen by libvirt, i.e. names you pass to virsh commands. These are unrelated to '/etc/hostname' within guest. But hopefully, you haven't renamed your guest since then and it is still named 'try06', that is virsh list --all produces 'try06' in the list. If this is all true, can you share the output of: strace $(which getent) hosts try06 Michal