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[Michael Camilli <2014226@xxxxxxxxxxxxxxxxxx>]

Public bug reported:


I have static routes specified for two networks, and during cloud-init an error occurs as it tries to make use of NETMASK1.

  # Network 2
  eth1:
    addresses: # List of IP[v4,v6] addresses to assign to this interface
      - 2001:db8:abcd:abce:fe::1000/96

    routes: # List of static routes for this interface
      - to: 2001:db8:abcd:abce:fe::0/96
        via: 2001:db8:abcd:bbce:fe::2

  # Network 3
  eth2:
    addresses: # List of IP[v4,v6] addresses to assign to this interface
      - 2001:db8:abcd:abcf:fe::1000/96

    routes: # List of static routes for this interface
      - to: 2001:db8:abcd:abcf:fe::0/96
        via: 2001:db8:abcd:bbcf:fe::2

Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/cloudinit/cmd/main.py", line 761, in status_wrapper
    ret = functor(name, args)
  File "/usr/lib/python3.6/site-packages/cloudinit/cmd/main.py", line 433, in main_init
    init.apply_network_config(bring_up=bring_up_interfaces)
  File "/usr/lib/python3.6/site-packages/cloudinit/stages.py", line 926, in apply_network_config
    netcfg, bring_up=bring_up
  File "/usr/lib/python3.6/site-packages/cloudinit/distros/__init__.py", line 233, in apply_network_config
    self._write_network_state(network_state)
  File "/usr/lib/python3.6/site-packages/cloudinit/distros/__init__.py", line 129, in _write_network_state
    renderer.render_network_state(network_state)
  File "/usr/lib/python3.6/site-packages/cloudinit/net/sysconfig.py", line 1011, in render_network_state
    base_sysconf_dir, network_state, self.flavor, templates=templates
  File "/usr/lib/python3.6/site-packages/cloudinit/net/sysconfig.py", line 1002, in _render_sysconfig
    contents[cpath] = iface_cfg.routes.to_string(proto)
  File "/usr/lib/python3.6/site-packages/cloudinit/net/sysconfig.py", line 199, in to_string
    netmask_value = str(self._conf["NETMASK" + index])
KeyError: 'NETMASK1'

Additional Info:
1. Using KVM on a private server
2. See above configuration details that cause an issue. Note in the documentation I could only find an example of an ipv4 route, so maybe you could enhance the documentation with an example for ipv6 if possible.

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

** Attachment added: "cloud-init.tar.gz"
   https://bugs.launchpad.net/bugs/2014226/+attachment/5659716/+files/cloud-init.tar.gz

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https://bugs.launchpad.net/bugs/2014226

Title:
  cloud-init crashes with IPv6 routes

Status in cloud-init:
  New

Bug description:
  
  I have static routes specified for two networks, and during cloud-init an error occurs as it tries to make use of NETMASK1.

    # Network 2
    eth1:
      addresses: # List of IP[v4,v6] addresses to assign to this interface
        - 2001:db8:abcd:abce:fe::1000/96

      routes: # List of static routes for this interface
        - to: 2001:db8:abcd:abce:fe::0/96
          via: 2001:db8:abcd:bbce:fe::2

    # Network 3
    eth2:
      addresses: # List of IP[v4,v6] addresses to assign to this interface
        - 2001:db8:abcd:abcf:fe::1000/96

      routes: # List of static routes for this interface
        - to: 2001:db8:abcd:abcf:fe::0/96
          via: 2001:db8:abcd:bbcf:fe::2

  Traceback (most recent call last):
    File "/usr/lib/python3.6/site-packages/cloudinit/cmd/main.py", line 761, in status_wrapper
      ret = functor(name, args)
    File "/usr/lib/python3.6/site-packages/cloudinit/cmd/main.py", line 433, in main_init
      init.apply_network_config(bring_up=bring_up_interfaces)
    File "/usr/lib/python3.6/site-packages/cloudinit/stages.py", line 926, in apply_network_config
      netcfg, bring_up=bring_up
    File "/usr/lib/python3.6/site-packages/cloudinit/distros/__init__.py", line 233, in apply_network_config
      self._write_network_state(network_state)
    File "/usr/lib/python3.6/site-packages/cloudinit/distros/__init__.py", line 129, in _write_network_state
      renderer.render_network_state(network_state)
    File "/usr/lib/python3.6/site-packages/cloudinit/net/sysconfig.py", line 1011, in render_network_state
      base_sysconf_dir, network_state, self.flavor, templates=templates
    File "/usr/lib/python3.6/site-packages/cloudinit/net/sysconfig.py", line 1002, in _render_sysconfig
      contents[cpath] = iface_cfg.routes.to_string(proto)
    File "/usr/lib/python3.6/site-packages/cloudinit/net/sysconfig.py", line 199, in to_string
      netmask_value = str(self._conf["NETMASK" + index])
  KeyError: 'NETMASK1'

  Additional Info:
  1. Using KVM on a private server
  2. See above configuration details that cause an issue. Note in the documentation I could only find an example of an ipv4 route, so maybe you could enhance the documentation with an example for ipv6 if possible.

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