Re: [Engine-devel] Network Wiring

>> <snip> >> >>>>> purge a network while it is connected to VMs: Link-Down on >>>>> all >>>>> nics >>>>> and connect to the empty/no network. (Yes I know, it's not >>>>> par >>>>> of >>>>> the >>>>> feature, but you know someone will ask for it soon :)) >>>> >>>> It should not be hard to implement; In >>>> http://wiki.ovirt.org/wiki/Feature/DetailedNetworkWiring#New_API >>>> I >>>> suggest passing >>>> no 'network' element to mean "connected to nothing". >>>> >>> I don't really understand why changing the link state to down is >>> not enough? >>> What is the added value of connecting "unwired" nic to a none >>> network? >> >> It is not a big deal of a difference, but the semantics of having >> no >> network is clear: you can run the VM if networks are missing, you >> can >> remove a network when the VM is running. When a VM is associated to >> a >> network, but its link state is down, the "right" semantics is more >> vague. > > Indeed :) > > Plus consider the use case of hooks providing the networking - they > still need the engine to assign the MAC and type (like the CISCO > hook). > If you force a logical network on each nic, it means you have to > invent a dummy LN and define it as non-required and set the global > config to allow VMs to run on hosts that do not have this networks - > Too messy. Though sometimes desirable since the network name may be > a hint to the hook, there are cases it's not. > > -> No LN means this VM can run on any host! with implicit assumption > that someone else takes care of connecting it to the proper network. > > Note that in this case you may still want the network with link state > up and be allowed to bring the link up/down so it's for sure not the > case as 'unwired/link down but connected to arbitrary network' > I"ve added "none" network option to the wiki. Any more comments? Do we have green light to start working on the feature?

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