distro/arch.py fixes

[Paul Melis]

I needed to patch a few places in distros/arch.py to get cloud-init to work on Arch. This is with an OpenNebula-based cloud, but that shouldn't matter. In /etc/cloud/cloud.cfg I obviously used "arch" for system_info -> distro.

I checked against current trunk version of distros/arch.py. There's 3 issues in arch.py that this patch fixes (in order of appearance in the patch):

1. The loopback device is returned as an entry by net_util.translate_network(), leading to it gettingprocessed to configure settings like IP address, netmask, etc, but these aren't available and leads to an exception. I simply removed the "lo" entry from the dictionary.

2. The netctl command expects its profile files to be named /etc/netctl/<iface>. The code in arch.py leaves out the last separator, leading to files like /etc/netctleth0, which doesn't work

3. The function convert_resolv_conf() can't possibly work, as it tries to iterate over the "list" type instead of the "settings" list.

[Scott Moser (smoser)]

Paul,
Thanks for the patch. I can pull this, but you'll need to sign the Canonical contributors agreement.
http://www.ubuntu.com/legal/contributors
please feel free to ping me in irc (freenode smoser) or email if you have questions.

[Joshua Powers (powersj)]

Hey Paul, any chance you were able to sign the contributor agreement?

[Paul Melis (paul-floorball-flamingos)]

I'd rather not sign the CLA. Is placing the patch in the public domain a good alternative?

[Rich Lees (rlees85)]

I really would like to see this merged. Can I do anything to help? I will agree to the agreement as long as there is nothing stupid in there.

[Rich Lees (rlees85)]

Update: I signed the agreement. I was going to make a patch file exactly the same as this for the same reasons. If it could be assumed "mine" and merged that would be great. Alternatively, I would raise another bug with an identical patch file attached.

Please advice on how to proceed... Would love for this to make the next release...

[Rich Lees (rlees85)]

https://bugs.launchpad.net/cloud-init/+bug/1706593

[Scott Moser (smoser)]

I'm marking this a duplicate of the newly filed 1706593. See discussion there.