RFC: new modes in network-manager 0.7 + ifupdown

Oliver Grawert ogra at ubuntu.com
Wed Oct 8 12:26:39 BST 2008


hi,
Am Dienstag, den 07.10.2008, 11:33 +0200 schrieb Alexander Sack:
>   [main]
>   plugins=ifupdown,keyfile
>            ^^^ ifupdown needs to be enabled!!
> 
>   [ifupdown]
>   managed=false
>           ^^^ this means unmanaged mode. use "true" here for the (experimental)
>               managed mode
As we discussed on IRC yesterday there are some drawbacks with services
requiring a static interface being up for their own startup if the above
managed mode is enabled. Namely we discused dhcp3-server which does a
check for running interfaces with static configuration and compares that
to its own config. If it doesnt find a working interface for its IP
range definition it will fail to start. 
Currently dhcpd starts with a sysvinit sequence number of S25 while
network manager starts with S30, network manager can not start earlier
due to the fact that it needs dbus and hal to be up.
 
One of the conclusions was that we need to make sure dhcpd's initscript
starts late enough past S30 unless we want to omit the self test feature
(which would be a bad idea imho) but due to the fact that NM can also
dynamically change the contents of /etc/network/interfaces and bring
interfaces down/up with ifupdown, a call to the initscript in
if-up.d/if-down.d would be necessary.

i have filed https://bugs.launchpad.net/ubuntu/+source/dhcp3/+bug/280123
but would like to hear some other opinions before making such a change.

ciao
	oli
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