Public bug reported:
Fan allows for variable sized subnet map sizes. For example, if I want
to map a /24 to a /16 instead of the default /16 to /8, Fan supports
this. However, when configuring this via fanatic, I see that docker
configuration fails. In /etc/default/docker, the --fixed-cidr flag is
defined incorrectly.
$ sudo fanatic
Welcome to the fanatic fan networking wizard. This will help you set
up an example fan network and optionally configure docker and/or LXD touse this
network. See fanatic(1) for more details.
Configure fan underlay (hit return to accept, or specify alternative)
[192.168.0.0/16]: 192.168.1.0/24
Configure fan overlay (hit return to accept, or specify alternative)
[250.0.0.0/8]: 250.99.0.0/16
Create LXD networking for underlay:192.168.1.0/24 overlay:250.99.0.0/16 [Yn]: Y
Profile fan-250-99 created
Create docker networking for underlay:192.168.1.0/24 overlay:250.99.0.0/16
[Yn]: Y
Job for docker.service failed because the control process exited with error
code. See "systemctl status docker.service" and "journalctl -xe" for details.
Test LXD networking for underlay:192.168.1.10/24 overlay:250.99.0.0/16
(NOTE: potentially triggers large image downloads) [Yn]: n
Test docker networking for underlay:192.168.1.10/24 overlay:250.99.0.0/16
(NOTE: potentially triggers large image downloads) [Yn]: n
This host IP address: 192.168.1.10
Remote test host IP address (none to skip):
/usr/sbin/fanatic: Testing skipped
$ grep "DOCKER_OPTS" /etc/default/docker
# Use DOCKER_OPTS to modify the daemon startup options.
#DOCKER_OPTS="--dns 8.8.8.8 --dns 8.8.4.4"
DOCKER_OPTS=" -b fan-250-99 --mtu=1450 --iptables=false
--fixed-cidr=250.99.10.0/40"
May 20 05:15:30 macbook docker[27364]:
time="2016-05-20T05:15:30.411933688-07:00" level=fatal msg="Error
starting daemon: Error initializing network controller: invalid CIDR
address: 250.99.10.0/40"
** Affects: ubuntu-fan (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1584092
Title:
Docker misconfigured when using non-default overlay/underlay netmask
size
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