configure_networking fails if dhcp provides no domain search path

[dann frazier]

configure_networking() always returns an error for me. Using 'set -x', I observed the following at the end of a test script:

+ for n in $ns_addrs
+ '[' ', ' = '["192.168.122.1", ' ']'
+ continue
+ alist='["192.168.122.1"]'
+ '[' -n '' ']'
+ echo ' nameservers:'
+ echo ' addresses: ["192.168.122.1"]'
+ '[' -n '' ']'

Which corresponds to this line of code in _render_netplan():

  [ -n "$slist" ] && echo " search: $slist"

I noticed that my dhcp server (default libvirt net) does not provide a domain search path, which is triggering this. If I move my VM to a network w/ a DHCP server that *does* provide this search path, it continues fine.

[Launchpad Janitor (janitor)]

This bug was fixed in the package initramfs-tools - 0.136ubuntu2

---------------
initramfs-tools (0.136ubuntu2) focal; urgency=medium

  * scripts/functions:_render_netplan(): Make configure_networking()
    more resilient when called by set -e scripts. LP: #1868310.

 -- dann frazier <email address hidden> Fri, 20 Mar 2020 14:09:47 -0600