yahoo-eng-team team mailing list archive

[Harald Jensås <1959148@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Description of problem:
The routes put in route6-$DEVICE by cloud-init is in an invalid format.

The schema[1] for network_matadata uses a non-converntinal format for
the IPv6 netmask. It is stored as an IPv6 address, similar to how IPv4
netmasks are written 255.255.255.0 the IPv6 netmask is written as
FFFF:FFFF:FFFF:FFFF:: in the network metadata.

cloud-init does not translate this. So you end up with:

cat /etc/sysconfig/network-scripts/route6-ens3
# Created by cloud-init on instance boot automatically, do not edit.
#
::/:: via fd00:fd00:fd00:2::fffe  dev ens3
fd00:fd00:fd00:1::/ffff:ffff:ffff:ffff:: via fd00:fd00:fd00:2::fffe  dev ens3
fd00:fd00:fd00::/ffff:ffff:ffff:ffff:: via fd00:fd00:fd00:2::fffe  dev ens3

The result is that the routes are ignored since it is not a valid inet6
prefix.

[1]
https://docs.openstack.org/nova/latest/_downloads/9119ca7ac90aa2990e762c08baea3a36/network_data.json


Actual results:
Jan 26 14:12:45 overcloud-novacompute-0 NetworkManager[1027]: <warn>  [1643206365.7973] ifcfg-rh:     ignoring invalid route at "::/:: via fd00:fd00:fd00:2::fffe  dev ens3" (/etc/sysconfig/network-scripts/route6-ens3:3): Argument for "::/::" is not ADDR/PREFIX format
Jan 26 14:12:45 overcloud-novacompute-0 NetworkManager[1027]: <warn>  [1643206365.7977] ifcfg-rh:     ignoring invalid route at "fd00:fd00:fd00:1::/ffff:ffff:ffff:ffff:: via fd00:fd00:fd00:2::fffe  dev ens3" (/etc/sysconfig/network-scripts/route6-ens3:4): Argument for "fd00:fd00:fd00:1::/ffff:ffff:ffff:ffff::" is not ADDR/PREFIX format
Jan 26 14:12:45 overcloud-novacompute-0 NetworkManager[1027]: <warn>  [1643206365.7979] ifcfg-rh:     ignoring invalid route at "fd00:fd00:fd00::/ffff:ffff:ffff:ffff:: via fd00:fd00:fd00:2::fffe  dev ens3" (/etc/sysconfig/network-scripts/route6-ens3:5): Argument for "fd00:fd00:fd00::/ffff:ffff:ffff:ffff::" is not ADDR/PREFIX format

ip -6 route add fd00:fd00:fd00::/ffff:ffff:ffff:ffff:: via fd00:fd00:fd00::1
Error: inet6 prefix is expected rather than "fd00:fd00:fd00::/ffff:ffff:ffff:ffff::".

Expected results:
The netmask should be the decimal number in CIDR annotation.

** Affects: cloud-init
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1959148

Title:
  cloud-init writes route6-$DEVICE config with a HEX netmask. ip route
  does not like : Error: inet6 prefix is expected rather than
  "fd00:fd00:fd00::/ffff:ffff:ffff:ffff::".

Status in cloud-init:
  New

Bug description:
  Description of problem:
  The routes put in route6-$DEVICE by cloud-init is in an invalid format.

  The schema[1] for network_matadata uses a non-converntinal format for
  the IPv6 netmask. It is stored as an IPv6 address, similar to how IPv4
  netmasks are written 255.255.255.0 the IPv6 netmask is written as
  FFFF:FFFF:FFFF:FFFF:: in the network metadata.

  cloud-init does not translate this. So you end up with:

  cat /etc/sysconfig/network-scripts/route6-ens3
  # Created by cloud-init on instance boot automatically, do not edit.
  #
  ::/:: via fd00:fd00:fd00:2::fffe  dev ens3
  fd00:fd00:fd00:1::/ffff:ffff:ffff:ffff:: via fd00:fd00:fd00:2::fffe  dev ens3
  fd00:fd00:fd00::/ffff:ffff:ffff:ffff:: via fd00:fd00:fd00:2::fffe  dev ens3

  The result is that the routes are ignored since it is not a valid
  inet6 prefix.

  [1]
  https://docs.openstack.org/nova/latest/_downloads/9119ca7ac90aa2990e762c08baea3a36/network_data.json

  
  Actual results:
  Jan 26 14:12:45 overcloud-novacompute-0 NetworkManager[1027]: <warn>  [1643206365.7973] ifcfg-rh:     ignoring invalid route at "::/:: via fd00:fd00:fd00:2::fffe  dev ens3" (/etc/sysconfig/network-scripts/route6-ens3:3): Argument for "::/::" is not ADDR/PREFIX format
  Jan 26 14:12:45 overcloud-novacompute-0 NetworkManager[1027]: <warn>  [1643206365.7977] ifcfg-rh:     ignoring invalid route at "fd00:fd00:fd00:1::/ffff:ffff:ffff:ffff:: via fd00:fd00:fd00:2::fffe  dev ens3" (/etc/sysconfig/network-scripts/route6-ens3:4): Argument for "fd00:fd00:fd00:1::/ffff:ffff:ffff:ffff::" is not ADDR/PREFIX format
  Jan 26 14:12:45 overcloud-novacompute-0 NetworkManager[1027]: <warn>  [1643206365.7979] ifcfg-rh:     ignoring invalid route at "fd00:fd00:fd00::/ffff:ffff:ffff:ffff:: via fd00:fd00:fd00:2::fffe  dev ens3" (/etc/sysconfig/network-scripts/route6-ens3:5): Argument for "fd00:fd00:fd00::/ffff:ffff:ffff:ffff::" is not ADDR/PREFIX format

  ip -6 route add fd00:fd00:fd00::/ffff:ffff:ffff:ffff:: via fd00:fd00:fd00::1
  Error: inet6 prefix is expected rather than "fd00:fd00:fd00::/ffff:ffff:ffff:ffff::".

  Expected results:
  The netmask should be the decimal number in CIDR annotation.

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