| 2017-11-13 18:46:38 |
Scott Moser |
bug |
|
|
added bug |
| 2017-11-13 18:47:01 |
Scott Moser |
bug task added |
|
systemd (Ubuntu) |
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| 2018-02-26 17:05:25 |
Ryan Harper |
bug |
|
|
added subscriber Ryan Harper |
| 2018-04-11 00:13:33 |
Launchpad Janitor |
merge proposal linked |
|
https://code.launchpad.net/~raharper/netplan/+git/netplan/+merge/342976 |
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| 2018-05-08 14:49:12 |
Mathieu Trudel-Lapierre |
nplan (Ubuntu): status |
New |
Fix Released |
|
| 2018-05-08 14:54:52 |
Mathieu Trudel-Lapierre |
description |
I noticed that lxd (lxc list) reports that an lxc container has an ipv6 address in artful or bionic. It does not list this in xenial or zesty. I suspect this change occurred in the switch over to netplan/networkd.
This may at first seem harmless or even desired, but note that the user configuration did not request ipv6 config, so its presence is a bug.
$ for rel in xenial zesty artful bionic; do
lxc launch ubuntu-daily:$rel $rel-demo; done
Creating xenial-demo
Starting xenial-demo
..
Creating bionic-demo
Starting bionic-demo
$ sleep 10
$ lxc list
$ lxc list
+-------------+---------+----------------------+------------------------------------------------+------------+-----------+
| NAME | STATE | IPV4 | IPV6 | TYPE | SNAPSHOTS |
+-------------+---------+----------------------+------------------------------------------------+------------+-----------+
| artful-demo | RUNNING | 10.75.205.208 (eth0) | fd42:eee5:7c43:3d62:3a42:611c:3f6f:1184 (eth0) | PERSISTENT | 0 |
+-------------+---------+----------------------+------------------------------------------------+------------+-----------+
| bionic-demo | RUNNING | 10.75.205.187 (eth0) | fd42:eee5:7c43:3d62:6f4:155b:39cc:fc3d (eth0) | PERSISTENT | 0 |
+-------------+---------+----------------------+------------------------------------------------+------------+-----------+
| xenial-demo | RUNNING | 10.75.205.143 (eth0) | | PERSISTENT | 0 |
+-------------+---------+----------------------+------------------------------------------------+------------+-----------+
| zesty-demo | RUNNING | 10.75.205.123 (eth0) | | PERSISTENT | 0 |
+-------------+---------+----------------------+------------------------------------------------+------------+-----------+
## Here is the config that was provided by lxd
$ lxc exec bionic-demo cat /var/lib/cloud/seed/nocloud-net/network-config
version: 1
config:
- type: physical
name: eth0
subnets:
- type: dhcp
control: auto
## Here is the config that cloud-init rendered.
$ lxc exec bionic-demo -- grep -v '^#' /etc/netplan/50-cloud-init.yaml
network:
version: 2
ethernets:
eth0:
dhcp4: true
$ lxc exec bionic-demo cat /run/systemd/network/10-netplan-eth0.network
[Match]
Name=eth0
[Network]
DHCP=ipv4
[DHCP]
UseMTU=true
RouteMetric=100
$ lxc exec bionic-demo -- systemctl status --no-pager --full systemd-networkd
● systemd-networkd.service - Network Service
Loaded: loaded (/lib/systemd/system/systemd-networkd.service; enabled; vendor preset: enabled)
Active: active (running) since Mon 2017-11-13 18:37:34 UTC; 8min ago
Docs: man:systemd-networkd.service(8)
Main PID: 118 (systemd-network)
Status: "Processing requests..."
Tasks: 1 (limit: 4915)
Memory: 2.0M
CPU: 19ms
CGroup: /system.slice/systemd-networkd.service
└─118 /lib/systemd/systemd-networkd
Nov 13 18:37:34 bionic-demo systemd[1]: Starting Network Service...
Nov 13 18:37:34 bionic-demo systemd-networkd[118]: eth0: Gained IPv6LL
Nov 13 18:37:34 bionic-demo systemd-networkd[118]: Enumeration completed
Nov 13 18:37:34 bionic-demo systemd[1]: Started Network Service.
Nov 13 18:37:37 bionic-demo systemd-networkd[118]: eth0: DHCPv6 address fd42:eee5:7c43:3d62:6f4:155b:39cc:fc3d/128 timeout preferred 3600 valid 3600
Nov 13 18:37:37 bionic-demo systemd-networkd[118]: eth0: DHCPv4 address 10.75.205.187/24 via 10.75.205.1
Nov 13 18:37:37 bionic-demo systemd-networkd[118]: Not connected to system bus, ignoring transient hostname.
Nov 13 18:37:39 bionic-demo systemd-networkd[118]: eth0: Configured
Nov 13 18:38:09 bionic-demo systemd-networkd[118]: Could not set hostname: Method call timed out
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: nplan 0.30
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu4
Architecture: amd64
Date: Mon Nov 13 18:27:53 2017
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
LANG=C.UTF-8
SourcePackage: nplan
UpgradeStatus: No upgrade log present (probably fresh install) |
[Impact]
All users of netplan.
[Test case]
== LXD containers ==
1) Start an LXD container (artful or bionic)
2) Verify that an IPv6 address is present
3) Verify that the system is brought up in a reasonable time (does not wait 2 minutes to be reachable).
== servers / cloud instances ==
1) Start a bionic system, with no IPv6 connectivity (no router to advertise a prefix)
2) Verify that the system boots quickly (does not wait 2 minutes to be reachable).
[Regression potential]
Since this changes default IPv6 behavior, care should be taken to validate that systems are maintaining IPv6 connectivity when it is available, and similarly that systems where no IPv6 connectivity is available on the network are behaving correctly: there should not be long boot delays, and no extra IPv6 addresses aside from link-local addresses generated by the kernel.
--
I noticed that lxd (lxc list) reports that an lxc container has an ipv6 address in artful or bionic. It does not list this in xenial or zesty. I suspect this change occurred in the switch over to netplan/networkd.
This may at first seem harmless or even desired, but note that the user configuration did not request ipv6 config, so its presence is a bug.
$ for rel in xenial zesty artful bionic; do
lxc launch ubuntu-daily:$rel $rel-demo; done
Creating xenial-demo
Starting xenial-demo
..
Creating bionic-demo
Starting bionic-demo
$ sleep 10
$ lxc list
$ lxc list
+-------------+---------+----------------------+------------------------------------------------+------------+-----------+
| NAME | STATE | IPV4 | IPV6 | TYPE | SNAPSHOTS |
+-------------+---------+----------------------+------------------------------------------------+------------+-----------+
| artful-demo | RUNNING | 10.75.205.208 (eth0) | fd42:eee5:7c43:3d62:3a42:611c:3f6f:1184 (eth0) | PERSISTENT | 0 |
+-------------+---------+----------------------+------------------------------------------------+------------+-----------+
| bionic-demo | RUNNING | 10.75.205.187 (eth0) | fd42:eee5:7c43:3d62:6f4:155b:39cc:fc3d (eth0) | PERSISTENT | 0 |
+-------------+---------+----------------------+------------------------------------------------+------------+-----------+
| xenial-demo | RUNNING | 10.75.205.143 (eth0) | | PERSISTENT | 0 |
+-------------+---------+----------------------+------------------------------------------------+------------+-----------+
| zesty-demo | RUNNING | 10.75.205.123 (eth0) | | PERSISTENT | 0 |
+-------------+---------+----------------------+------------------------------------------------+------------+-----------+
## Here is the config that was provided by lxd
$ lxc exec bionic-demo cat /var/lib/cloud/seed/nocloud-net/network-config
version: 1
config:
- type: physical
name: eth0
subnets:
- type: dhcp
control: auto
## Here is the config that cloud-init rendered.
$ lxc exec bionic-demo -- grep -v '^#' /etc/netplan/50-cloud-init.yaml
network:
version: 2
ethernets:
eth0:
dhcp4: true
$ lxc exec bionic-demo cat /run/systemd/network/10-netplan-eth0.network
[Match]
Name=eth0
[Network]
DHCP=ipv4
[DHCP]
UseMTU=true
RouteMetric=100
$ lxc exec bionic-demo -- systemctl status --no-pager --full systemd-networkd
● systemd-networkd.service - Network Service
Loaded: loaded (/lib/systemd/system/systemd-networkd.service; enabled; vendor preset: enabled)
Active: active (running) since Mon 2017-11-13 18:37:34 UTC; 8min ago
Docs: man:systemd-networkd.service(8)
Main PID: 118 (systemd-network)
Status: "Processing requests..."
Tasks: 1 (limit: 4915)
Memory: 2.0M
CPU: 19ms
CGroup: /system.slice/systemd-networkd.service
└─118 /lib/systemd/systemd-networkd
Nov 13 18:37:34 bionic-demo systemd[1]: Starting Network Service...
Nov 13 18:37:34 bionic-demo systemd-networkd[118]: eth0: Gained IPv6LL
Nov 13 18:37:34 bionic-demo systemd-networkd[118]: Enumeration completed
Nov 13 18:37:34 bionic-demo systemd[1]: Started Network Service.
Nov 13 18:37:37 bionic-demo systemd-networkd[118]: eth0: DHCPv6 address fd42:eee5:7c43:3d62:6f4:155b:39cc:fc3d/128 timeout preferred 3600 valid 3600
Nov 13 18:37:37 bionic-demo systemd-networkd[118]: eth0: DHCPv4 address 10.75.205.187/24 via 10.75.205.1
Nov 13 18:37:37 bionic-demo systemd-networkd[118]: Not connected to system bus, ignoring transient hostname.
Nov 13 18:37:39 bionic-demo systemd-networkd[118]: eth0: Configured
Nov 13 18:38:09 bionic-demo systemd-networkd[118]: Could not set hostname: Method call timed out
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: nplan 0.30
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu4
Architecture: amd64
Date: Mon Nov 13 18:27:53 2017
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
LANG=C.UTF-8
SourcePackage: nplan
UpgradeStatus: No upgrade log present (probably fresh install) |
|
| 2018-05-08 20:48:59 |
Brian Murray |
nplan (Ubuntu Artful): status |
New |
Fix Committed |
|
| 2018-05-08 20:49:03 |
Brian Murray |
bug |
|
|
added subscriber Ubuntu Stable Release Updates Team |
| 2018-05-08 20:49:06 |
Brian Murray |
bug |
|
|
added subscriber SRU Verification |
| 2018-05-08 20:49:12 |
Brian Murray |
tags |
amd64 apport-bug bionic uec-images |
amd64 apport-bug bionic uec-images verification-needed verification-needed-artful |
|
| 2018-05-08 21:08:55 |
Brian Murray |
nplan (Ubuntu Xenial): status |
New |
Fix Committed |
|
| 2018-05-08 21:09:03 |
Brian Murray |
tags |
amd64 apport-bug bionic uec-images verification-needed verification-needed-artful |
amd64 apport-bug bionic uec-images verification-needed verification-needed-artful verification-needed-xenial |
|
| 2018-05-14 22:45:57 |
Mathieu Trudel-Lapierre |
tags |
amd64 apport-bug bionic uec-images verification-needed verification-needed-artful verification-needed-xenial |
amd64 apport-bug bionic uec-images verification-done-artful verification-done-xenial |
|
| 2018-06-06 01:09:38 |
Launchpad Janitor |
nplan (Ubuntu Artful): status |
Fix Committed |
Fix Released |
|
| 2018-06-06 01:09:54 |
Chris Halse Rogers |
removed subscriber Ubuntu Stable Release Updates Team |
|
|
|
| 2018-06-06 01:10:38 |
Launchpad Janitor |
nplan (Ubuntu Xenial): status |
Fix Committed |
Fix Released |
|
| 2021-06-30 21:12:34 |
Dan Streetman |
systemd (Ubuntu): status |
New |
Invalid |
|
