I saw a case of a nil-expansion of `dns_ipv4` causing this error in code that looks like this:
r "ip -n #{q_vm} addr replace #{dns_ipv4} dev #{nic.tap}"
And has errors like:
---STDERR---
RTNETLINK answers: Operation not supported
from /home/rhizome/host/lib/vm_setup.rb:271:in `block in setup_taps_6'
from /home/rhizome/host/lib/vm_setup.rb:268:in `each'
from /home/rhizome/host/lib/vm_setup.rb:268:in `setup_taps_6'
from /home/rhizome/host/lib/vm_setup.rb:96:in `setup_networking'
from /home/rhizome/host/lib/vm_setup.rb:49:in `block in prep'
/home/rhizome/common/lib/util.rb:29:in `r': command failed: ip -n vmg1x0hy addr replace dev nc9g0we9s2 (CommandFail)
While this was probably caused by an old running code image, it seems
like we can check for the existence of obliged fields in `params.json`
as we do all the others, for some reason, a couple got square brackets
rather than `.fetch`.
fcb93202c3