Hi, on the latest VyOS 1.2.0-rc9 the command:
set protocols bgp 65010 parameters default no-ipv4-unicast

I'm going to verify @dmbaturin patch to set level to info. Additionally we could also use immark, which leave a 'heartbeat' marker in the logfiles, so one can verify logging at least works. It would be visible to remote logging as well.

Sorry, I just overlooked it.

It's not really a bug, the log level is per default set not to log everything, like @EwaldvanGeffen stated above.
'set system syslog global facility all level all' will log everything, embedded users with flash drives will hate us for this if we change it :).
In my opinion, if someone needs to debug anything, he/she can just set the global logging or even to a particular file for debugging.
Otherwise, we can just change the section in the default config to have logging anything enabled per default, which increases the risk for losing information due to disk space limitation for /var/log as well as the quicker rotation (only 5 files are being stored per default).

The functionality is fixed in 1.2-rcX for ARP, I haven't verified other services such as DNS.

@dmbaturin install_routes = 0 not present in rc3

bmon was always there, it's in the dependencies of vyos-1x.

I've made a workaround for it. I've also reported the root cause to FRR: https://github.com/FRRouting/frr/issues/3215