Er, problems for the hypervisor, that is. And an admin probably doesn't want to deal with configuring all of those, even if it can be scripted, so CloudStack does the creation/deletion.
On Wed, Mar 4, 2015 at 8:18 AM, Marcus <shadow...@gmail.com> wrote: > As for why, it's a scalability issue. There are people who are using > (or have defined) 10,000+ guest networks. If CloudStack left bridges > around that weren't being used it could cause problems for the guest, > so it keeps things tidy by only keeping bridges that are used. > > On Wed, Mar 4, 2015 at 8:16 AM, Marcus <shadow...@gmail.com> wrote: >> I don't think anyone has ever tested what would happen if the admin >> has manually defined the same guest bridges that CloudStack wants to >> use. CloudStack creates them on the fly and deletes them when the last >> VM has been removed. I assume you're using these bridges on the host >> for something out of band that CloudStack isn't aware of? >> >> On Wed, Mar 4, 2015 at 8:09 AM, Andrija Panic <andrija.pa...@gmail.com> >> wrote: >>> I forgot to add - this is ACS 4.3.0 and CentOS 6.x... breth1-500 is the >>> main bridge used for Shared Network (yes, I know, somewhat confusing name >>> for the bridge...) >>> >>> On 4 March 2015 at 17:07, Andrija Panic <andrija.pa...@gmail.com> wrote: >>> >>>> Hi people. >>>> >>>> on physical host, I was having breth1-500(bridge) with eth1(joined to this >>>> bridge) - all defined manually in Centos network config files. >>>> (when you boot physical host - this bridge is active of course) >>>> >>>> When I deploy new VM with Shared Network with vlan 500, new device is >>>> created eth1.500 and joined to this bridge - which is fine, and then vnet0 >>>> device from VM is also joined to the bridge... >>>> >>>> >>>> >>>> When I stop the last VM that is using this Shared Network, CloudStack >>>> (agent?) removes eth1.500 from bridge (fine with me), and ***then removed >>>> eth1 from bridge (which I manually configured !!!) and later stoped/removed >>>> the whole bridge*** >>>> >>>> If you try to start new VM again (joined to Shared Network with vlan 500) >>>> - then no bridge is available, VM is started, but no vnet device, no >>>> breth1-500 bridge up, and no eth1.500 up. >>>> No bridge was available - but also bridge was not created on the fly... >>>> >>>> >>>> Is there any explanation - why the heck would my manually configured >>>> bridge get deleted? >>>> >>>> -- >>>> >>>> Andrija Panić >>>> >>> >>> >>> >>> -- >>> >>> Andrija Panić
