*** This bug is a duplicate of bug 1907878 ***
https://bugs.launchpad.net/bugs/1907878
** This bug has been marked a duplicate of bug 1907878
wrong var declaration in if-up.d/resolved (nm-dispatcher[54417]:
/etc/network/if-up.d/resolved: 12: mystatedir: not found)
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https://bugs.launchpad.net/bugs/1910273
Title:
Upgrade to groovy breaks DNS resolution
Status in ifupdown package in Ubuntu:
Confirmed
Bug description:
~# lsb_release -rd
Description: Ubuntu 20.10
Release: 20.10
~# apt-cache policy ifupdown
ifupdown:
Instalēts: 0.8.35ubuntu2
Kandidāts: 0.8.35ubuntu2
Versiju tabula:
*** 0.8.35ubuntu2 500
500 http://mirrors.digitalocean.com/ubuntu groovy/universe amd64
Packages
100 /var/lib/dpkg/status
~#
Problem: Upon upgrade from Ubuntu 20.04 to Ubuntu 20.10, I expected
name resolution upon reboot to work as usual.
What happened:
a) /var/log/syslog sprinkled with error messages:
- /etc/network/if-up.d/resolved: 12: mystatedir: not found
- /etc/network/if-up.d/resolved: 70: DNS: not found
- /etc/network/if-up.d/resolved: 1: /run/network/ifupdown-inet-eth0:
DNS=8.8.8.8 8.8.4.4: not found
b) resolvectl dns returning no name servers
Investigation:
Recently changed /etc/network/if-up.d/resolved and
/etc/network/if-down.d/resolved files contain programming errors. See
https://git.launchpad.net/ubuntu/+source/ifupdown/commit/?id=54fec5eedfd59adaffe9021c271914578dd05d1b
.
Fix:
$ diff
/Users/pklavins/Downloads/ifupdown-0.8.35ubuntu2/debian/if-down.d/resolved
if-down.d_resolved
12c12
< mystatedir statedir ifindex interface
---
> # local mystatedir statedir ifindex interface
$ diff
/Users/pklavins/Downloads/ifupdown-0.8.35ubuntu2/debian/if-up.d/resolved
if-up.d_resolved
12c12
< mystatedir statedir ifindex interface
---
> # local mystatedir statedir ifindex interface
39,40c39,40
< DNS=DNS
< DOMAINS=DOMAINS
---
> DNS=$DNS
> DOMAINS=$DOMAINS
42,43c42,43
< DNS=DNS6
< DOMAINS=DOMAINS6
---
> DNS=$DNS6
> DOMAINS=$DOMAINS6
47c47
< "$DNS"="$NEW_DNS"
---
> DNS="$NEW_DNS"
51c51
< "$DOMAINS"="$NEW_DOMAINS"
---
> DOMAINS="$NEW_DOMAINS"
70c70
< DNS DNS6 DOMAINS DOMAINS6 DEFAULT_ROUTE
---
> # local DNS DNS6 DOMAINS DOMAINS6 DEFAULT_ROUTE
$
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