[Bug 1746419] [NEW] bond parameters are not changed by 'netplan apply'

[Daniel Axtens]

Public bug reported:

I have a yaml file as follows:

network:
    version: 2
    ethernets:
        bonddevs:
            match:
                name: ens[78]
    bonds:
        bond0:
            interfaces: [bonddevs]
            parameters:
                mode: active-backup
                mii-monitor-interval: 1
            addresses:
                - 10.10.10.1/24


Say I decide that 1s is too frequent for the MII interval, and I want to change the interval to 2s.

If I change that in the yaml, then run
# netplan generate
# netplan apply
# cat /proc/net/bonding/bond0|grep "MII Polling Interval (ms)"
MII Polling Interval (ms): 1000

In other words, the change has not been applied.

Running netplan --debug apply prints:
DEBUG:device bond0 operstate is up, not replugging

So I wondered if bringing the bond down would help. It does not:
# ip link set dev bond0 down
# netplan apply
# cat /proc/net/bonding/bond0|grep "MII Polling Interval (ms)"
MII Polling Interval (ms): 1000

However, deleting the link works:
# ip link del dev bond0
# netplan apply
# cat /proc/net/bonding/bond0|grep "MII Polling Interval (ms)"
MII Polling Interval (ms): 2000

This is counter-intuitive behaviour.
Ideally, I would like a regular netplan apply to work without deleting the bond.
However, a changed to the docs to make this clear would be OK.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: nplan 0.32~17.10.1
ProcVersionSignature: User Name 4.13.0-32.35-generic 4.13.13
Uname: Linux 4.13.0-32-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
Date: Wed Jan 31 05:47:42 2018
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=C.UTF-8
 SHELL=/bin/bash
SourcePackage: nplan
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: nplan (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug artful uec-images

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to nplan in Ubuntu.
https://bugs.launchpad.net/bugs/1746419

Title:
  bond parameters are not changed by 'netplan apply'

Status in nplan package in Ubuntu:
  New

Bug description:
  I have a yaml file as follows:

  network:
      version: 2
      ethernets:
          bonddevs:
              match:
                  name: ens[78]
      bonds:
          bond0:
              interfaces: [bonddevs]
              parameters:
                  mode: active-backup
                  mii-monitor-interval: 1
              addresses:
                  - 10.10.10.1/24

  
  Say I decide that 1s is too frequent for the MII interval, and I want to change the interval to 2s.

  If I change that in the yaml, then run
  # netplan generate
  # netplan apply
  # cat /proc/net/bonding/bond0|grep "MII Polling Interval (ms)"
  MII Polling Interval (ms): 1000

  In other words, the change has not been applied.

  Running netplan --debug apply prints:
  DEBUG:device bond0 operstate is up, not replugging

  So I wondered if bringing the bond down would help. It does not:
  # ip link set dev bond0 down
  # netplan apply
  # cat /proc/net/bonding/bond0|grep "MII Polling Interval (ms)"
  MII Polling Interval (ms): 1000

  However, deleting the link works:
  # ip link del dev bond0
  # netplan apply
  # cat /proc/net/bonding/bond0|grep "MII Polling Interval (ms)"
  MII Polling Interval (ms): 2000

  This is counter-intuitive behaviour.
  Ideally, I would like a regular netplan apply to work without deleting the bond.
  However, a changed to the docs to make this clear would be OK.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: nplan 0.32~17.10.1
  ProcVersionSignature: User Name 4.13.0-32.35-generic 4.13.13
  Uname: Linux 4.13.0-32-generic x86_64
  ApportVersion: 2.20.7-0ubuntu3.7
  Architecture: amd64
  Date: Wed Jan 31 05:47:42 2018
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=C.UTF-8
   SHELL=/bin/bash
  SourcePackage: nplan
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/nplan/+bug/1746419/+subscriptions