Comment 3 for bug 1501033

I've modified the image a bit, to add 'set -x' to /sbin/resolvconf, and to also echo '::: "$0" "$@"' in /sbin/resolvconf before the -x . so you can easily find those by looking for '::: /sbin/resolvconf'

I've caught in pass and fail and attach journalctl output here.
Also showing output of some things inside just for reference. The only differnce between pass and fail in the following output is presence of 'nameserver 10.0.2.3' The fail case is shown, pass would have that line after DO NOT EDIT.

$ cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN

$ ls -l /etc/resolv.conf
lrwxrwxrwx 1 root root 29 Oct 3 21:37 /etc/resolv.conf -> ../run/resolvconf/resolv.conf

$ cat /run/network/ifstate
eth0=eth0
lo=lo

$ cat /run/net-eth0.conf
DEVICE='eth0'
PROTO='dhcp'
IPV4ADDR='10.0.2.15'
IPV4BROADCAST='10.0.2.255'
IPV4NETMASK='255.255.255.0'
IPV4GATEWAY='10.0.2.2'
IPV4DNS0='10.0.2.3'
IPV4DNS1='0.0.0.0'
HOSTNAME=''
DNSDOMAIN=''
NISDOMAIN=''
ROOTSERVER='10.0.2.2'
ROOTPATH=''
filename=''
UPTIME='16'
DHCPLEASETIME='86400'
DOMAINSEARCH=''