yahoo-eng-team team mailing list archive

[Scott Moser <smoser@xxxxxxxxxx>]

** Also affects: cloud-init (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Also affects: cloud-init (Ubuntu Yakkety)
   Importance: Undecided
       Status: New

** Changed in: cloud-init (Ubuntu Xenial)
       Status: New => Confirmed

** Changed in: cloud-init (Ubuntu Yakkety)
       Status: New => Confirmed

** Changed in: cloud-init (Ubuntu Xenial)
   Importance: Undecided => Medium

** Changed in: cloud-init (Ubuntu Yakkety)
   Importance: Undecided => Medium

-- 
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to cloud-init.
https://bugs.launchpad.net/bugs/1669860

Title:
  cloud-init attempts to rename bonds

Status in cloud-init:
  Fix Committed
Status in cloud-init package in Ubuntu:
  Fix Released
Status in cloud-init source package in Xenial:
  Confirmed
Status in cloud-init source package in Yakkety:
  Confirmed

Bug description:
  1. Zesty amd64
  2. cloud-init 0.7.9-47-gc81ea53-0ubuntu1

  3. cloud-init boots with a bond network config and does not attempt to
  rename bond0

  4. cloud-init init (net mode) fails when it attempts to rename a bond
  interface

  
  Running with the following network config (2 nics)
  config:
  -   mac_address: bc:76:4e:06:96:b3
      name: interface0
      type: physical
  -   mac_address: bc:76:4e:04:88:41
      name: interface1
      type: physical
  -   bond_interfaces:
      - interface0
      - interface1
      name: bond0
      params:
          bond_miimon: 100
          bond_mode: 802.3ad
          bond_xmit_hash_policy: layer3+4
      type: bond
  -   name: bond0.108
      subnets:
      -   address: 65.61.151.38
          netmask: 255.255.255.252
          routes:
          -   gateway: 65.61.151.37
              netmask: 0.0.0.0
              network: 0.0.0.0
          type: static
      -   address: 2001:4800:78ff:1b:be76:4eff:fe06:96b3
          netmask: 'ffff:ffff:ffff:ffff::'
          routes:
          -   gateway: 2001:4800:78ff:1b::1
              netmask: '::'
              network: '::'
          type: static
      type: vlan
      vlan_id: '108'
      vlan_link: bond0
  -   name: bond0.208
      subnets:
      -   address: 10.184.225.122
          netmask: 255.255.255.252
          routes:
          -   gateway: 10.184.225.121
              netmask: 255.240.0.0
              network: 10.176.0.0
          -   gateway: 10.184.225.121
              netmask: 255.240.0.0
              network: 10.208.0.0
          type: static
      type: vlan
      vlan_id: '208'
      vlan_link: bond0
  -   address: 72.3.128.240
      type: nameserver
  -   address: 72.3.128.241
      type: nameserver

  
  During cloud-init init --local; the network configuration is rendered and brought up
  bond0 is a virtual interface which uses the MAC from one of the slaves.

  In cloud-init init (net) mode, we check if the interfaces are named properly;
  When cloud-init collects the current_rename_info, it reads the MAC address of
  each device listed in /sys/class/net;  this includes *virtual* devices, like bonds/bridges
  Then it looks up an interface name by MAC, however the bond and one of the interfaces
  have the same value which results in cloud-init attempting to rename bond0

  The solution is to not collect MACs of virtual interfaces for rename-purpose since
  virtual devices do not ever get renamed; their name is defined by the config.

  diff --git a/cloudinit/net/__init__.py b/cloudinit/net/__init__.py
  index ea649cc..e2a50ad 100755
  --- a/cloudinit/net/__init__.py
  +++ b/cloudinit/net/__init__.py
  @@ -14,6 +14,7 @@ from cloudinit import util
   
   LOG = logging.getLogger(__name__)
   SYS_CLASS_NET = "/sys/class/net/"
  +SYS_DEV_VIRT_NET = "/sys/devices/virtual/net/"
   DEFAULT_PRIMARY_INTERFACE = 'eth0'
   
   
  @@ -205,7 +206,11 @@ def _get_current_rename_info(check_downable=True):
       """Collect information necessary for rename_interfaces."""
       names = get_devicelist()
       bymac = {}
  +    virtual = os.listdir(SYS_DEV_VIRT_NET)
       for n in names:
  +        # do not attempt to rename virtual interfaces
  +        if n in virtual:
  +            continue
           bymac[get_interface_mac(n)] = {
               'name': n, 'up': is_up(n), 'downable': None}
   

  Log file of a failure:
  http://paste.ubuntu.com/24084999/

To manage notifications about this bug go to:
https://bugs.launchpad.net/cloud-init/+bug/1669860/+subscriptions