MAAS

2.3 - Network preseed misconfigures static routes

Bug #1752332 reported by Scott Hussey on 2018-02-28

This bug report is a duplicate of: Bug #1758919: Static routes are not per-interface, which breaks some deployments. Edit Remove

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	MAAS	Triaged	High	Unassigned

Bug Description

In 2.3, with cloud-init configuring networking, the ENI renderer produces a valid, but suspect interfaces file when using static routes. MaaS is producing a network config that puts all the static routes in the 'network.routes' stanza instead of including each route in the 'subnets.[].routes' section for the interface that would be the source for that route.

The static routes are translated into post-up/pre-down that appear at the tail end of the interfaces file. ifup interprets this by attaching these post-up/pre-down actions to the last interface. We have seen a lot of indeterminate behavior with routes not getting configured becauses the last interface defined in the interfaces will come up before the source interface for some of the routes. The particular configuration this has shown up on is a bonded interface with multiple VLAN tagged subinterfaces on it. Each subinterface has one or more static routes, but all the route statements are attributed to the last VLAN tagged interface. Deployed nodes on reboot can have a random set of the routes not configured with the fix being to ifdown/ifup the last defined VLAN tagged interface.

Attached is a patch we are using to correct this until it is fixed in the upstream MaaS. It is rough and is likely not a final fix.

diff --git a/src/maasserver/preseed_network.py b/src/maasserver/preseed_network.py
index 1be72d6..96ee6a3 100644
--- a/src/maasserver/preseed_network.py
+++ b/src/maasserver/preseed_network.py
@@ -192,7 +192,7 @@ class InterfaceConfiguration:
         return {
             route
             for route in self.routes
- if route.source == source
+ if str(route.source.cidr) == str(source.cidr)
         }

     def _generate_addresses(self, version=1):
@@ -251,8 +251,12 @@ class InterfaceConfiguration:
                                 v2_nameservers["addresses"] = []
                         v2_nameservers["addresses"].extend(
                             [server for server in subnet.dns_servers])
- self.matching_routes.update(
- self._get_matching_routes(subnet))
+ net_routes = self._get_matching_routes(subnet)
+ rl = [_generate_route_operation(r, version=version)
+ for r
+ in net_routes]
+ v1_subnet_operation['routes'] = rl
+ v2_config['routes'] = rl
             if dhcp_type:
                 v1_config.append(
                     {"type": dhcp_type}

Revision history for this message

Scott Hussey (sh8121) wrote on 2018-02-28:

2.3_route.patch Edit (1.3 KiB, text/plain)

Revision history for this message

Andres Rodriguez (andreserl) wrote on 2018-02-28:

Hi Scott,

MAAS doesn’t pass network configuration to cloud-init. MAAS passes the network configuration to Curtin. Curtin decided to pass through this configuration to cloud-init instead of doing it in Curtin itself.

If cloud-init is not interpreting the configuration correctly as expected by Curtin, then this is a bug in cloud-init. Could you please attach the present that’s been sent so we can triage debug this issue.

Changed in maas:
status:	New → Incomplete

Revision history for this message

Andres Rodriguez (andreserl) wrote on 2018-02-28:

Btw, you can get the preseed with “maas <user> machine get-curtin-config <systemd_id>

Feel free to attach the relevant information.

Revision history for this message

Scott Hussey (sh8121) wrote on 2018-02-28:

Download full text (5.7 KiB)

cloud-init is interpreting it fine. The issue is the configuration generated by MaaS is really not rendered correctly to get a stable network configuration on a deployed node.

Stock MaaS 2.3:
Success.
Machine-readable output follows:
apt:
  preserve_sources_list: false
  primary:
  - arches:
    - default
    uri: http://archive.ubuntu.com/ubuntu
  security:
  - arches:
    - default
    uri: http://archive.ubuntu.com/ubuntu
cloudconfig:
  maas-cloud-config:
    content: "#cloud-config\ndatasource:\n MAAS: {consumer_key: rzjLYaaUtzNnNb8kFT,\
      \ metadata_url: 'http://172.24.1.100:31900/MAAS/metadata/',\n token_key:\
      \ HgLwAXPcmyUzQQpqsj, token_secret: defLwJ5V63EXwK5TEU2W6h3C4aGgk8Ls}\n"
    path: /etc/cloud/cloud.cfg.d/90_maas_cloud_config.cfg
  maas-datasource:
    content: 'datasource_list: [ MAAS ]'
    path: /etc/cloud/cloud.cfg.d/90_maas_datasource.cfg
  maas-reporting:
    content: "#cloud-config\nreporting:\n maas: {consumer_key: rzjLYaaUtzNnNb8kFT,\
      \ endpoint: 'http://172.24.1.100:31900/MAAS/metadata/status/fndqc4',\n token_key:\
      \ HgLwAXPcmyUzQQpqsj, token_secret: defLwJ5V63EXwK5TEU2W6h3C4aGgk8Ls,\n type:\
      \ webhook}\n"
    path: /etc/cloud/cloud.cfg.d/90_maas_cloud_init_reporting.cfg
  maas-ubuntu-sso:
    content: '#cloud-config

snappy: {email: none@none}

      '
    path: /etc/cloud/cloud.cfg.d/90_maas_ubuntu_sso.cfg
debconf_selections:
  grub2: grub2 grub2/update_nvram boolean false
  maas: 'cloud-init cloud-init/datasources multiselect MAAS

cloud-init cloud-init/maas-metadata-url string http://172.24.1.100:31900/MAAS/metadata/

cloud-init cloud-init/maas-metadata-credentials string oauth_token_key=HgLwAXPcmyUzQQpqsj&oauth_token_secret=defLwJ5V63EXwK5TEU2W6h3C4aGgk8Ls&oauth_consumer_key=rzjLYaaUtzNnNb8kFT

    cloud-init cloud-init/local-cloud-config string apt:\n preserve_sources_list:
    false\n primary:\n - arches: [default]\n uri: http://archive.ubuntu.com/ubuntu\n security:\n -
    arches: [default]\n uri: http://archive.ubuntu.com/ubuntu\napt_preserve_sources_list:
    true\nmanage_etc_hosts: false\nmanual_cache_clean: true\nreporting:\n maas: {consumer_key:
    rzjLYaaUtzNnNb8kFT, endpoint: ''http://172.24.1.100:31900/MAAS/metadata/status/fndqc4'',\n token_key:
    HgLwAXPcmyUzQQpqsj, token_secret: defLwJ5V63EXwK5TEU2W6h3C4aGgk8Ls,\n type:
    webhook}\nsystem_info:\n package_mirrors:\n - arches: [i386, amd64]\n failsafe:
    {primary: ''http://archive.ubuntu.com/ubuntu'', security: ''http://security.ubuntu.com/ubuntu''}\n search:\n primary:
    [''http://archive.ubuntu.com/ubuntu'']\n security: [''http://archive.ubuntu.com/ubuntu'']\n -
    arches: [default]\n failsafe: {primary: ''http://ports.ubuntu.com/ubuntu-ports'',
    security: ''http://ports.ubuntu.com/ubuntu-ports''}\n search:\n primary:
    [''http://ports.ubuntu.com/ubuntu-ports'']\n security: [''http://ports.ubuntu.com/ubuntu-ports'']\n

    '
early_commands:
  driver_00:
  - sh
  - -c
  - echo third party drivers not installed or necessary.
install:
  log_file: /tmp/install.log
  post_files:
  - /tmp/install.log
kernel:
  mapping: {}...

cloud-init is interpreting it fine. The issue is the configuration generated by MaaS is really not rendered correctly to get a stable network configuration on a deployed node.

Stock MaaS 2.3:
Success.
Machine-readable output follows:
apt:
  preserve_sources_list: false
  primary:
  - arches:
    - default
    uri: http://archive.ubuntu.com/ubuntu
  security:
  - arches:
    - default
    uri: http://archive.ubuntu.com/ubuntu
cloudconfig:
  maas-cloud-config:
    content: "#cloud-config\ndatasource:\n  MAAS: {consumer_key: rzjLYaaUtzNnNb8kFT,\
      \ metadata_url: 'http://172.24.1.100:31900/MAAS/metadata/',\n    token_key:\
      \ HgLwAXPcmyUzQQpqsj, token_secret: defLwJ5V63EXwK5TEU2W6h3C4aGgk8Ls}\n"
    path: /etc/cloud/cloud.cfg.d/90_maas_cloud_config.cfg
  maas-datasource:
    content: 'datasource_list: [ MAAS ]'
    path: /etc/cloud/cloud.cfg.d/90_maas_datasource.cfg
  maas-reporting:
    content: "#cloud-config\nreporting:\n  maas: {consumer_key: rzjLYaaUtzNnNb8kFT,\
      \ endpoint: 'http://172.24.1.100:31900/MAAS/metadata/status/fndqc4',\n    token_key:\
      \ HgLwAXPcmyUzQQpqsj, token_secret: defLwJ5V63EXwK5TEU2W6h3C4aGgk8Ls,\n    type:\
      \ webhook}\n"
    path: /etc/cloud/cloud.cfg.d/90_maas_cloud_init_reporting.cfg
  maas-ubuntu-sso:
    content: '#cloud-config

snappy: {email: none@none}

'
    path: /etc/cloud/cloud.cfg.d/90_maas_ubuntu_sso.cfg
debconf_selections:
  grub2: grub2   grub2/update_nvram  boolean false
  maas: 'cloud-init   cloud-init/datasources  multiselect MAAS

cloud-init   cloud-init/maas-metadata-url  string http://172.24.1.100:31900/MAAS/metadata/

cloud-init   cloud-init/maas-metadata-credentials  string oauth_token_key=HgLwAXPcmyUzQQpqsj&oauth_token_secret=defLwJ5V63EXwK5TEU2W6h3C4aGgk8Ls&oauth_consumer_key=rzjLYaaUtzNnNb8kFT

cloud-init   cloud-init/local-cloud-config  string apt:\n  preserve_sources_list:
    false\n  primary:\n  - arches: [default]\n    uri: http://archive.ubuntu.com/ubuntu\n  security:\n  -
    arches: [default]\n    uri: http://archive.ubuntu.com/ubuntu\napt_preserve_sources_list:
    true\nmanage_etc_hosts: false\nmanual_cache_clean: true\nreporting:\n  maas: {consumer_key:
    rzjLYaaUtzNnNb8kFT, endpoint: ''http://172.24.1.100:31900/MAAS/metadata/status/fndqc4'',\n    token_key:
    HgLwAXPcmyUzQQpqsj, token_secret: defLwJ5V63EXwK5TEU2W6h3C4aGgk8Ls,\n    type:
    webhook}\nsystem_info:\n  package_mirrors:\n  - arches: [i386, amd64]\n    failsafe:
    {primary: ''http://archive.ubuntu.com/ubuntu'', security: ''http://security.ubuntu.com/ubuntu''}\n    search:\n      primary:
    [''http://archive.ubuntu.com/ubuntu'']\n      security: [''http://archive.ubuntu.com/ubuntu'']\n  -
    arches: [default]\n    failsafe: {primary: ''http://ports.ubuntu.com/ubuntu-ports'',
    security: ''http://ports.ubuntu.com/ubuntu-ports''}\n    search:\n      primary:
    [''http://ports.ubuntu.com/ubuntu-ports'']\n      security: [''http://ports.ubuntu.com/ubuntu-ports'']\n

'
early_commands:
  driver_00:
  - sh
  - -c
  - echo third party drivers not installed or necessary.
install:
  log_file: /tmp/install.log
  post_files:
  - /tmp/install.log
kernel:
  mapping: {}
  package: linux-signed-generic-hwe-16.04
late_commands:
  maas:
  - wget
  - --no-proxy
  - http://172.24.1.100:31900/MAAS/metadata/latest/by-id/fndqc4/
  - --post-data
  - op=netboot_off
  - -O
  - /dev/null
network:
  config:
  - id: ens3
    mac_address: 52:54:00:00:a3:31
    mtu: 1500
    name: ens3
    subnets:
    - type: manual
    type: physical
  - id: ens7
    mac_address: 52:54:00:88:40:4a
    mtu: 1500
    name: ens7
    subnets:
    - type: manual
    type: physical
  - bond_interfaces:
    - ens3
    - ens7
    id: bond0
    mac_address: 52:54:00:00:a3:31
    mtu: 1500
    name: bond0
    params:
      bond-downdelay: 200
      bond-lacp-rate: slow
      bond-miimon: 100
      bond-mode: balance-rr
      bond-updelay: 200
      bond-xmit-hash-policy: layer2
    subnets:
    - address: 172.24.1.101/24
      dns_nameservers: []
      gateway: 172.24.1.1
      type: static
    type: bond
  - destination: 172.20.0.0/24
    gateway: 172.24.1.1
    id: 1
    metric: 50
    type: route
  - address:
    - 172.24.1.100
    search:
    - maas
    type: nameserver
  version: 1
network_commands:
  builtin:
  - curtin
  - net-meta
  - custom
partitioning_commands:
  builtin:
  - curtin
  - block-meta
  - custom
reporting:
  maas:
    consumer_key: rzjLYaaUtzNnNb8kFT
    endpoint: http://172.24.1.100:31900/MAAS/metadata/status/fndqc4
    token_key: HgLwAXPcmyUzQQpqsj
    token_secret: defLwJ5V63EXwK5TEU2W6h3C4aGgk8Ls
    type: webhook
showtrace: true
storage:
  config:
  - grub_device: true
    id: sda
    model: QEMU HARDDISK
    name: sda
    ptable: msdos
    serial: drive-scsi0-0-0-0
    type: disk
    wipe: superblock
  - id: sdb
    model: QEMU HARDDISK
    name: sdb
    serial: drive-scsi0-0-1-0
    type: disk
    wipe: superblock
  - device: sda
    flag: boot
    id: sda-part1
    name: sda-part1
    number: 1
    offset: 4194304B
    size: 998244352B
    type: partition
    uuid: 867e13e2-a670-4f59-8d79-9c4abed9845c
    wipe: superblock
  - device: sda
    id: sda-part2
    name: sda-part2
    number: 2
    size: 19998441472B
    type: partition
    uuid: 5db858e2-7d96-4e4e-b16a-f51fae0ddf7f
    wipe: superblock
  - fstype: ext4
    id: sda-part1_format
    label: boot
    type: format
    uuid: e9417ba9-b51c-4d12-bfc9-8a95a950dbb6
    volume: sda-part1
  - fstype: ext4
    id: sda-part2_format
    label: root
    type: format
    uuid: 9263ac38-0acf-41f7-9e6d-f47500271c07
    volume: sda-part2
  - device: sda-part2_format
    id: sda-part2_mount
    path: /
    type: mount
  - device: sda-part1_format
    id: sda-part1_mount
    path: /boot
    type: mount
  version: 1
verbosity: 2

Revision history for this message

Scott Hussey (sh8121) wrote on 2018-02-28:

Download full text (5.5 KiB)

With the patch applied:
apt:
  preserve_sources_list: false
  primary:
  - arches:
    - default
    uri: http://archive.ubuntu.com/ubuntu
  security:
  - arches:
    - default
    uri: http://archive.ubuntu.com/ubuntu
cloudconfig:
  maas-cloud-config:
    content: "#cloud-config\ndatasource:\n MAAS: {consumer_key: rzjLYaaUtzNnNb8kFT,\
      \ metadata_url: 'http://172.24.1.100:31900/MAAS/metadata/',\n token_key:\
      \ HgLwAXPcmyUzQQpqsj, token_secret: defLwJ5V63EXwK5TEU2W6h3C4aGgk8Ls}\n"
    path: /etc/cloud/cloud.cfg.d/90_maas_cloud_config.cfg
  maas-datasource:
    content: 'datasource_list: [ MAAS ]'
    path: /etc/cloud/cloud.cfg.d/90_maas_datasource.cfg
  maas-reporting:
    content: "#cloud-config\nreporting:\n maas: {consumer_key: rzjLYaaUtzNnNb8kFT,\
      \ endpoint: 'http://172.24.1.100:31900/MAAS/metadata/status/fndqc4',\n token_key:\
      \ HgLwAXPcmyUzQQpqsj, token_secret: defLwJ5V63EXwK5TEU2W6h3C4aGgk8Ls,\n type:\
      \ webhook}\n"
    path: /etc/cloud/cloud.cfg.d/90_maas_cloud_init_reporting.cfg
  maas-ubuntu-sso:
    content: '#cloud-config

snappy: {email: none@none}

      '
    path: /etc/cloud/cloud.cfg.d/90_maas_ubuntu_sso.cfg
debconf_selections:
  grub2: grub2 grub2/update_nvram boolean false
  maas: 'cloud-init cloud-init/datasources multiselect MAAS

cloud-init cloud-init/maas-metadata-url string http://172.24.1.100:31900/MAAS/metadata/

cloud-init cloud-init/maas-metadata-credentials string oauth_token_key=HgLwAXPcmyUzQQpqsj&oauth_consumer_key=rzjLYaaUtzNnNb8kFT&oauth_token_secret=defLwJ5V63EXwK5TEU2W6h3C4aGgk8Ls

With the patch applied:
apt:
  preserve_sources_list: false
  primary:
  - arches:
    - default
    uri: http://archive.ubuntu.com/ubuntu
  security:
  - arches:
    - default
    uri: http://archive.ubuntu.com/ubuntu
cloudconfig:
  maas-cloud-config:
    content: "#cloud-config\ndatasource:\n  MAAS: {consumer_key: rzjLYaaUtzNnNb8kFT,\
      \ metadata_url: 'http://172.24.1.100:31900/MAAS/metadata/',\n    token_key:\
      \ HgLwAXPcmyUzQQpqsj, token_secret: defLwJ5V63EXwK5TEU2W6h3C4aGgk8Ls}\n"
    path: /etc/cloud/cloud.cfg.d/90_maas_cloud_config.cfg
  maas-datasource:
    content: 'datasource_list: [ MAAS ]'
    path: /etc/cloud/cloud.cfg.d/90_maas_datasource.cfg
  maas-reporting:
    content: "#cloud-config\nreporting:\n  maas: {consumer_key: rzjLYaaUtzNnNb8kFT,\
      \ endpoint: 'http://172.24.1.100:31900/MAAS/metadata/status/fndqc4',\n    token_key:\
      \ HgLwAXPcmyUzQQpqsj, token_secret: defLwJ5V63EXwK5TEU2W6h3C4aGgk8Ls,\n    type:\
      \ webhook}\n"
    path: /etc/cloud/cloud.cfg.d/90_maas_cloud_init_reporting.cfg
  maas-ubuntu-sso:
    content: '#cloud-config

snappy: {email: none@none}

'
    path: /etc/cloud/cloud.cfg.d/90_maas_ubuntu_sso.cfg
debconf_selections:
  grub2: grub2   grub2/update_nvram  boolean false
  maas: 'cloud-init   cloud-init/datasources  multiselect MAAS

cloud-init   cloud-init/maas-metadata-url  string http://172.24.1.100:31900/MAAS/metadata/

cloud-init   cloud-init/maas-metadata-credentials  string oauth_token_key=HgLwAXPcmyUzQQpqsj&oauth_consumer_key=rzjLYaaUtzNnNb8kFT&oauth_token_secret=defLwJ5V63EXwK5TEU2W6h3C4aGgk8Ls

cloud-init   cloud-init/local-cloud-config  string apt:\n  preserve_sources_list:
    false\n  primary:\n  - arches: [default]\n    uri: http://archive.ubuntu.com/ubuntu\n  security:\n  -
    arches: [default]\n    uri: http://archive.ubuntu.com/ubuntu\napt_preserve_sources_list:
    true\nmanage_etc_hosts: false\nmanual_cache_clean: true\nreporting:\n  maas: {consumer_key:
    rzjLYaaUtzNnNb8kFT, endpoint: ''http://172.24.1.100:31900/MAAS/metadata/status/fndqc4'',\n    token_key:
    HgLwAXPcmyUzQQpqsj, token_secret: defLwJ5V63EXwK5TEU2W6h3C4aGgk8Ls,\n    type:
    webhook}\nsystem_info:\n  package_mirrors:\n  - arches: [i386, amd64]\n    failsafe:
    {primary: ''http://archive.ubuntu.com/ubuntu'', security: ''http://security.ubuntu.com/ubuntu''}\n    search:\n      primary:
    [''http://archive.ubuntu.com/ubuntu'']\n      security: [''http://archive.ubuntu.com/ubuntu'']\n  -
    arches: [default]\n    failsafe: {primary: ''http://ports.ubuntu.com/ubuntu-ports'',
    security: ''http://ports.ubuntu.com/ubuntu-ports''}\n    search:\n      primary:
    [''http://ports.ubuntu.com/ubuntu-ports'']\n      security: [''http://ports.ubuntu.com/ubuntu-ports'']\n

'
early_commands:
  driver_00:
  - sh
  - -c
  - echo third party drivers not installed or necessary.
install:
  log_file: /tmp/install.log
  post_files:
  - /tmp/install.log
kernel:
  mapping: {}
  package: linux-signed-generic-hwe-16.04
late_commands:
  maas:
  - wget
  - --no-proxy
  - http://172.24.1.100:31900/MAAS/metadata/latest/by-id/fndqc4/
  - --post-data
  - op=netboot_off
  - -O
  - /dev/null
network:
  config:
  - id: ens3
    mac_address: 52:54:00:00:a3:31
    mtu: 1500
    name: ens3
    subnets:
    - type: manual
    type: physical
  - id: ens7
    mac_address: 52:54:00:88:40:4a
    mtu: 1500
    name: ens7
    subnets:
    - type: manual
    type: physical
  - bond_interfaces:
    - ens3
    - ens7
    id: bond0
    mac_address: 52:54:00:00:a3:31
    mtu: 1500
    name: bond0
    params:
      bond-downdelay: 200
      bond-lacp-rate: slow
      bond-miimon: 100
      bond-mode: balance-rr
      bond-updelay: 200
      bond-xmit-hash-policy: layer2
    subnets:
    - address: 172.24.1.101/24
      dns_nameservers: []
      gateway: 172.24.1.1
      routes:
      - destination: 172.20.0.0/24
        gateway: 172.24.1.1
        id: 1
        metric: 50
        type: route
      type: static
    type: bond
  - address:
    - 172.24.1.100
    search:
    - maas
    type: nameserver
  version: 1
network_commands:
  builtin:
  - curtin
  - net-meta
  - custom
partitioning_commands:
  builtin:
  - curtin
  - block-meta
  - custom
reporting:
  maas:
    consumer_key: rzjLYaaUtzNnNb8kFT
    endpoint: http://172.24.1.100:31900/MAAS/metadata/status/fndqc4
    token_key: HgLwAXPcmyUzQQpqsj
    token_secret: defLwJ5V63EXwK5TEU2W6h3C4aGgk8Ls
    type: webhook
showtrace: true
storage:
  config:
  - grub_device: true
    id: sda
    model: QEMU HARDDISK
    name: sda
    ptable: msdos
    serial: drive-scsi0-0-0-0
    type: disk
    wipe: superblock
  - id: sdb
    model: QEMU HARDDISK
    name: sdb
    serial: drive-scsi0-0-1-0
    type: disk
    wipe: superblock
  - device: sda
    flag: boot
    id: sda-part1
    name: sda-part1
    number: 1
    offset: 4194304B
    size: 998244352B
    type: partition
    uuid: 867e13e2-a670-4f59-8d79-9c4abed9845c
    wipe: superblock
  - device: sda
    id: sda-part2
    name: sda-part2
    number: 2
    size: 19998441472B
    type: partition
    uuid: 5db858e2-7d96-4e4e-b16a-f51fae0ddf7f
    wipe: superblock
  - fstype: ext4
    id: sda-part1_format
    label: boot
    type: format
    uuid: e9417ba9-b51c-4d12-bfc9-8a95a950dbb6
    volume: sda-part1
  - fstype: ext4
    id: sda-part2_format
    label: root
    type: format
    uuid: 9263ac38-0acf-41f7-9e6d-f47500271c07
    volume: sda-part2
  - device: sda-part2_format
    id: sda-part2_mount
    path: /
    type: mount
  - device: sda-part1_format
    id: sda-part1_mount
    path: /boot
    type: mount
  version: 1
verbosity: 2

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Scott Hussey (sh8121) wrote on 2018-02-28:

Contrasting the above you can see that in stock MaaS the bond0 definition has no routes defined in its subnets section. The static route is instead at the top-level of the network configuration and not tied to its source subnet. This ends up with the cloud-init ENI renderer adding the post-up/pre-down commands to the end of the interfaces file.

With the patch, the static route is instead included in the bond0 subnets section and so tied to the interface that must be up for the route to have a valid next-hop. This ends up with the cloud-init ENI renderer adding the post-up/pre-down commands to the stanza for the interface.

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Mike Pontillo (mpontillo) wrote on 2018-02-28:

When we originally implemented the v1 YAML, routes were not allowed to be associated with interfaces. I think this is a good change, but we'll need to make sure we depend on a version of curtin that supports it. (It isn't clear from the changelog when curtin gained that support.)

Changed in maas:
status:	Incomplete → Triaged
importance:	Undecided → High

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Mike Pontillo (mpontillo) wrote on 2018-02-28:

Talking to Ryan Harper on IRC, It looks like the current version of curtin that MAAS depends on allows per-interface routes. So it should be safe to make this change.

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Scott Hussey (sh8121) wrote on 2018-05-10:

How is this a duplicate of a bug in Launchpad?