Hi Everyone,

I'm also from OpenStack, just wanted to add an idea and a question.

> > - In what order should cloud-init try ipv6 and ipv4?
> >    - cloud-init would prefer to know which one it should use so we don't 
> > timeout on an endpoint that isn't there.
>
> I would say that it it could be checked what IP addresses are configured in 
> the guest OS already and use correct one if only one type of addresses is 
> there. If there would be both IPv4 and IPv6, it could try IPv4 first as it is 
> like that now. What do You think about such solution?

Alternatively we may delay this decision by adding a new data source
'OpenStackIPv6' and then the cloud image builder can order 'OpenStack'
and 'OpenStackIPv6' in datasource_list as they see fit.

My question relates to the use of link-local addresses as it is also
commented on review.opendev.org. With my limited IPv6 experience, a
URL with a link-local address but without a zone is incomplete, right?
This is incomplete: http://[fe80::a9:fe:a9:fe]/. On the other hand
this is complete: http://[fe80::a9:fe:a9:fe%25eth0]/. At the time of
configuring cloud-init nobody will be able to predict the
guest-internal interface names. Is it okay for cloud-init to take the
incomplete address and discover the interface(s) to be used?

Thank you,
Bence Romsics
rubasov on freenode

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