Hi David,This ticket is for the source-list, which is for dns resolver and the
config is as follows.
version: 1
config:
- type: physical
name: eth0
- type: nameserver
address: ['xx.xx.xx.xx'] sortlist: ['xx.xx.xx.xx', 'xx.xx.xx.xx'] I
believe the only thing that is needed for cloud-init is to add the keyword
"sort-list" to the case list, so that it is written to /etc/resolv.conf.
As for source-based routing, there is no config recognized by cloud-init. It's
just straight network statements, name, ip, netmask, etc. The work is done by
a shell script in the if-up.d directory as follows:
#!/bin/sh
set -e
if [ "$METHOD" = loopback ]; then
exit 0
elif [ "$METHOD" = dhcp ]; then
exit 0
elif [ "$METHOD" = static ]; then
if [ "$IF_GATEWAY" ]; then
echo "exiting..."
exit 0
fi
fi
IF_GATEWAY="$(echo "$IF_ADDRESS" | cut -d. -f1-3).254"
ip route flush table "$IFACE"
ip route add default via "$IF_GATEWAY" table "$IFACE"
ip rule del lookup "$IFACE" || true
ip rule add from "$IF_ADDRESS" lookup "$IFACE"
Basically, if the interface is a loopback, dhcp, or already has a
default gateway, it does nothing. For any other interface, it adds a
default route to the route table causing all responses to inbound
traffic to use the same interface to respond on. The email I sent late
last night to your email, discusses what I've been able to find, in
terms of using systemd-networkd, but requires ver 235, as well as some
additional work in netplan and cloud-init to recognize all the values.
P.S. systemd 235, which I saw is proposed for bionic beaver, adds quite
a few nice functions, including "vrf".
From: David Britton <david.brit...@canonical.com>
To: jfgibb...@yahoo.com
Sent: Wednesday, November 1, 2017 4:50 PM
Subject: [Bug 1704402] Re: dns-sortlist not recognized in network-config
Hi James -- do you have an example #cloud-config that you can attach
that sets up source-based routing (please sanitize first if required)?
Thanks.
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report.
https://bugs.launchpad.net/bugs/1704402
Title:
dns-sortlist not recognized in network-config
Status in cloud-init:
Confirmed
Status in cloud-init package in Ubuntu:
New
Bug description:
I'm using LXD with Ubuntu images, and cloud-init to do initial setup
of container. I'm not sure, but I believe the issue is in cloud-init,
but would appreciate a pointer to the right location if not.
Currently using network-config meta data, cloud-init takes the
following config and converts correctly:
version: 1
config:
- type: physical
name: eth0
- type: nameserver
address: ['xx.xx.xx.xx']
search: ['example.local', 'example.org']
However including the following line is not recognized:
sortlist: ['xx.xx.xx.xx', 'xx.xx.xx.xx']
Please add support for this standard nameserver option.
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https://bugs.launchpad.net/cloud-init/+bug/1704402/+subscriptions
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https://bugs.launchpad.net/bugs/1704402
Title:
dns-sortlist not recognized in network-config
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