ubuntu-fan clearly triggers the problem.
Clean machine, no bridges after Juju installs ubuntu-fan and networking
still works as bridges were not created yet => no ifup/down executions:
root@maas-xenial3:/home/ubuntu# ifdown -a ; ifup -a
/usr/sbin/fanctl: 41: /usr/sbin/fanctl: arithmetic expression: expecting
primary: " (32-)/4 "
run-parts: /etc/network/if-up.d/ubuntu-fan exited with return code 2
Failed to bring up ens3.
root@maas-xenial3:/home/ubuntu# ifdown -a
root@maas-xenial3:/home/ubuntu# ifup -a
RTNETLINK answers: File exists
Failed to bring up ens3.
root@maas-xenial3:/home/ubuntu# apt purge ubuntu-fan
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
ubuntu-fan*
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
After this operation, 148 kB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 65843 files and directories currently installed.)
ubuntu-fan: removing default /etc/network/fan configuration
Purging configuration files for ubuntu-fan (0.12.8~16.04.1) ...
root@maas-xenial3:/home/ubuntu# ifdown -a
root@maas-xenial3:/home/ubuntu# ifup -a
RTNETLINK answers: File exists
Failed to bring up ens3.
root@maas-xenial3:/home/ubuntu# ifdown ens3
ifdown: interface ens3 not configured
root@maas-xenial3:/home/ubuntu# ip a d 10.10.101.103/24 dev ens3
root@maas-xenial3:/home/ubuntu# ifup -a
root@maas-xenial3:/home/ubuntu# apt install ubuntu-fan
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
ubuntu-fan
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/35.6 kB of archives.
Selecting previously unselected package ubuntu-fan.ce will be used.
Processing triggers for systemd (229-4ubuntu21) ...urrently installed.)
Processing triggers for ureadahead (0.100.0-19) ...ll.deb ...
Processing triggers for man-db (2.7.5-1) ...
Processing triggers for systemd (229-4ubuntu21) ...
root@maas-xenial3:/home/ubuntu# ifdown -a
root@maas-xenial3:/home/ubuntu# ifup -a
/usr/sbin/fanctl: 41: /usr/sbin/fanctl: arithmetic expression: expecting
primary: " (32-)/4 "
run-parts: /etc/network/if-up.d/ubuntu-fan exited with return code 2
Failed to bring up ens3.
root@maas-xenial3:/home/ubuntu# ifup -a
RTNETLINK answers: File exists
Failed to bring up ens3.
** Also affects: ubuntu-fan (Ubuntu)
Importance: Undecided
Status: New
** Summary changed:
- bridge activaction error: bridge activation failed
+ bridge activaction error: bridge activation failed | unconfigured interfaces
cause ifup failures
** Tags added: cpe-onsite
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https://bugs.launchpad.net/bugs/1737640
Title:
bridge activaction error: bridge activation failed | unconfigured
interfaces cause ifup failures
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