From forum: https://forum.vyos.io/t/dhcp-hostnames-of-clients-not-resolving-after-update-v1-2-3-1-2-rolling/4393
using set service dhcp-server hostfile-update
VyOS should be able to resolve hostnames of clients supplied with an IP address using DHCP. with v1.2-rolling-201911170217 VyOS fails to resolve these hostnames. this worked when using v1.2.3
the hosts file (VyOS 1.2-rolling-201911170217) seems to be correct:
admin@vyos:~$ cat /etc/hosts ### Autogenerated by VyOS ### ### Do not edit, your changes will get overwritten ### # Local host 127.0.0.1 localhost 127.0.1.1 vyos.lan vyos # The following lines are desirable for IPv6 capable hosts ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters # From DHCP and "system static host-mapping" 192.168.1.150 macmini.lan