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Several use cases in EC2 involve instances with multiple network interfaces and occasionally multiple addresses on a single interface.  I do not believe all of those need to be configured automatically, but it ought to remain possible for a user/script/etc to make network configuration changes that persist across reboots.
Several use cases in EC2 involve instances with multiple network interfaces and occasionally multiple addresses on a single interface.  I do not believe all of those need to be configured automatically, but it ought to remain possible for a user/script/etc to make network configuration changes that persist across reboots.
{{admon/caution|Work in progress|[[User:mhayden|mhayden]] is doing some rambling on systemd-networkd here since [[User:maxamillion|maxamillion]] asked so nicely.}}
==systemd-networkd use cases==
Here are some sample use cases for systemd-networkd and example configurations.
===Simple DHCP on a single interface===
For an interface <code>eth0</code>, a single <code>.network</code> file is needed:
<pre>
# cat /etc/systemd/network/eth0.network
[Match]
Name=eth0
[Network]
DHCP=yes
</pre>


[[User:Gholms|Gholms]] ([[User talk:Gholms|talk]]) 05:49, 27 August 2015 (UTC)
[[User:Gholms|Gholms]] ([[User talk:Gholms|talk]]) 05:49, 27 August 2015 (UTC)

Revision as of 02:18, 29 September 2015

This is a placeholder page for the discussion of what the Cloud image (Base at first, Atomic to follow) requires from a networking stack on it's images.


- configure DHCP, renew dhcp leases - configure with cloud-init - configure with traditional RH-ecosystem ifcfg-eth0 file (log warnings for unsupported options)


Questions!

- Q: any need to support more than one interface? - Q: if single interface, should we standardize on "eth0"" - Q: dns configuration? - Q: support static IP (via cloud-init?)


Several use cases in EC2 involve instances with multiple network interfaces and occasionally multiple addresses on a single interface. I do not believe all of those need to be configured automatically, but it ought to remain possible for a user/script/etc to make network configuration changes that persist across reboots.

Work in progress
mhayden is doing some rambling on systemd-networkd here since maxamillion asked so nicely.

systemd-networkd use cases

Here are some sample use cases for systemd-networkd and example configurations.

Simple DHCP on a single interface

For an interface eth0, a single .network file is needed:

# cat /etc/systemd/network/eth0.network
[Match]
Name=eth0

[Network]
DHCP=yes


Gholms (talk) 05:49, 27 August 2015 (UTC)