kernel-packages team mailing list archive

[Andy Whitcroft <apw@xxxxxxxxxxxxx>]

** Description changed:

  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): 
+ 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"
+ 
+ ===
+ [Impact]
+ 
+ Non default network splits are not honoured correctly.
+ 
+ [Test Case]
+ 
+ Setup fan with non /8 /16 split, as per reporter.
+ 
+ [Regression Potential]
+ 
+ Low, as these currently do not work correctly.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to ubuntu-fan in Ubuntu.
https://bugs.launchpad.net/bugs/1584092

Title:
  Docker misconfigured when using non-default overlay/underlay netmask
  size

Status in ubuntu-fan package in Ubuntu:
  Fix Released
Status in ubuntu-fan source package in Xenial:
  In Progress

Bug description:
  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"

  ===
  [Impact]

  Non default network splits are not honoured correctly.

  [Test Case]

  Setup fan with non /8 /16 split, as per reporter.

  [Regression Potential]

  Low, as these currently do not work correctly.

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