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[Bug 1669860] Re: cloud-init attempts to rename bonds

 

This bug was fixed in the package cloud-init - 0.7.9-90-g61eb03fe-
0ubuntu1~16.10.1

---------------
cloud-init (0.7.9-90-g61eb03fe-0ubuntu1~16.10.1) yakkety; urgency=medium

  * debian/cloud-init.templates: add Bigstep to list of sources. (LP: #1676460)
  * New upstream snapshot.
    - OpenStack: add 'dvs' to the list of physical link types. (LP: #1674946)
    - Fix bug that resulted in an attempt to rename bonds or vlans.
      (LP: #1669860)
    - tests: update OpenNebula and Digital Ocean to not rely on host
      interfaces.
    - net: in netplan renderer delete known image-builtin content.
      (LP: #1675576)
    - doc: correct grammar in capabilities.rst [David Tagatac]
    - ds-identify: fix detecting of maas datasource. (LP: #1677710)
    - netplan: remove debugging prints, add debug logging [Ryan Harper]
    - ds-identify: do not write None twice to datasource_list.
    - support resizing partition and rootfs on system booted without
      initramfs.  [Steve Langasek] (LP: #1677376)
    - apt_configure: run only when needed. (LP: #1675185)
    - OpenStack: identify OpenStack by product 'OpenStack Compute'.
      (LP: #1675349)
    - GCE: Search GCE in ds-identify, consider serial number in check.
      (LP: #1674861)
    - Add support for setting hashed passwords [Tore S. Lonoy] (LP: #1570325)
    - Fix filesystem creation when using "partition: auto"
      [Jonathan Ballet] (LP: #1634678)
    - ConfigDrive: support reading config drive data from /config-drive.
      (LP: #1673411)
    - ds-identify: fix detection of Bigstep datasource. (LP: #1674766)
    - test: add running of pylint [Joshua Powers]
    - ds-identify: fix bug where filename expansion was left on.
    - advertise network config v2 support (NETWORK_CONFIG_V2) in features.
    - Bigstep: fix bug when executing in python3. [root]
    - Fix unit test when running in a system deployed with cloud-init.
    - Bounce network interface for Azure when using the built-in path.
      [Brent Baude] (LP: #1674685)
    - cloudinit.net: add network config v2 parsing and rendering [Ryan Harper]
    - net: Fix incorrect call to isfile [Joshua Powers] (LP: #1674317)
    - net: add renderers for automatically selecting the renderer.
    - doc: fix config drive doc with regard to unpartitioned disks.
      (LP: #1673818)
    - test: Adding integratiron test for password as list [Joshua Powers]
    - render_network_state: switch arguments around, do not require target
    - support 'loopback' as a device type.
    - Integration Testing: improve testcase subclassing [Wesley Wiedenmeier]
    - gitignore: adding doc/rtd_html [Joshua Powers]
    - doc: add instructions for running integration tests via tox.
      [Joshua Powers]
    - test: avoid differences in 'date' output due to daylight savings.
    - Fix chef config module in omnibus install. [Jeremy Melvin] (LP: #1583837)
    - Add feature flags to cloudinit.version. [Wesley Wiedenmeier]
    - tox: add a citest environment
    - Support chpasswd/list being a list in addition to a string.
      [Sergio Lystopad] (LP: #1665694)
    - doc: Fix configuration example for cc_set_passwords module.
      [Sergio Lystopad] (LP: #1665773)
    - net: support both ipv4 and ipv6 gateways in sysconfig.
      [Lars Kellogg-Stedman] (LP: #1669504)
    - net: do not raise exception for > 3 nameservers
      [Lars Kellogg-Stedman] (LP: #1670052)

 -- Scott Moser <smoser@xxxxxxxxxx>  Mon, 03 Apr 2017 12:03:30 -0400

** Changed in: cloud-init (Ubuntu Yakkety)
       Status: Fix Committed => Fix Released

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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:
  Fix Released
Status in cloud-init source package in Yakkety:
  Fix Released

Bug description:
  === Begin SRU Template ===
  [Impact]
  When booting with bonds provided in networking configuration, cloud-init
  can fail as it attempts to rename the bond device to an interface.

  [Test Case]
   * download ubuntu cloud image
   * mount image, enable proposed, update, upgrade cloud-init
   * run 'bond-rename-launch' as provided.
   * login to kvm guest as 'ubuntu:passw0rd'
   * sudo cloud-init init

  the 'cloud-init init' above would fail before in an attempt
  to rename a bond device.  It will succeed now, as it will realize
  that it does not have anything to do.

  [Regression Potential]
  Should be small. regressions would be certainly related to
  bond or vlan configurations.

  === End SRU Template ===

  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/

  Related bugs:
   * bug 1682871: cloud-init attempts to rename vlans / get_interfaces_by_mac does not filter vlans

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