On Fri, Jun 16, 2017 at 02:38:21PM +0200, jean-christophe manciot wrote:
libvirt-nss is not for translating DNS names, rather than libvirt guest namesI meant hostname/guest name. There is no static DNS in /etc/hosts for the VMs and no specific records in DNS server. Can you see the guest in: /var/lib/libvirt/dnsmasq/virbr0.{macs,status}# cat /var/lib/libvirt/dnsmasq/virbr0.{macs,status} [ { "domain": "KVM-Ubuntu-GNS3-Server-17.04", "macs": [ "52:54:00:03:9f:9f" ] } ] [ { "ip-address": "192.168.122.124", "mac-address": "52:54:00:03:9f:9f", "hostname": "KVM-Ubuntu-GNS3-Server-17", "expiry-time": 1497617966 } ] You need to restart the network after you've set up the NSS module. I've rebooted the system. I am using something along the lines of:$ cat /etc/dnsmasq.d/libvirt.confserver=/virt/192.168.213.1 server=/213.168.192.in-addr.arpa/192.168.213.1/ I have no /etc/dnsmasq.d/libvirt.conf, but in */etc/dnsmasq.conf*: *local=/actionmystique.net/ <http://actionmystique.net/>*
That doesn't matter, i created libvirt.conf myself and my /etc/dnsmasq.conf includes everything from /etc/dnsmasq.d/ that ends with .conf. the line you are using means it will not forward those hostnames anywhere. But the problem is that you have 2 different dnsmasq daemons running at the same time and one doesn't know about the other. The one ran by libvirt will not be accessed anyhow unless you tell it to your system-wide one. So similarly to what I was suggesting, you'd need: server=/actionmystique.net/192.168.213.1 server=/213.168.192.in-addr.arpa/192.168.213.1/ instead of the local= line.
I thought this would add that domain name to the answers from whatever is found in DHCP leases.
But the leases are offered by different dnsmasq than which one the ping is asking.
The comment says: # Add local-only domains here, queries in these domains are answered # from /etc/hosts or DHCP only.
But there is nothing in /etc/hosts and nothing will ever be added there automatically. The only one who knows the hostname <-> IP address mapping is libvirt and its dnsmasq.
Since the first libvirt-nss module ("libvirt" plugin) looks into DHCP
server leases, the above setting should work, shouldn't it?
Actually, I've just realized that there is a discrepancy between the
libvirt VM guest name and the Ubuntu hostname, where the trailing ".04" has
been automatically removed.
So, the* hostname (not guest name) is accessible*:
# ping KVM-Ubuntu-GNS3-Server-17
PING KVM-Ubuntu-GNS3-Server-17 (192.168.122.124) 56(84) bytes of data.
64 bytes from KVM-Ubuntu-GNS3-Server-17 (192.168.122.124): icmp_seq=1
ttl=64 time=0.191 ms
64 bytes from KVM-Ubuntu-GNS3-Server-17 (192.168.122.124): icmp_seq=2
ttl=64 time=0.302 ms
...
*but not he FQDN*:
# ping KVM-Ubuntu-GNS3-Server-17.actionmystique.net
ping: KVM-Ubuntu-GNS3-Server-17.actionmystique.net: Name or service not
known
It all comes down to what is your usage, what are your use cases,
basically what are you trying to achieve here. Unless we know that,
there is no one clear answer.
P.S.: About the .04, that is yet another level of domain that, I think,
might get stripped, or just used differently when nsswitch is
actually asking for it.
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