On 2018/04/02 11:22 am, Laine Stump wrote:
I've run into an issue here that I thought you might have some insight
on.
I can't seem to "re-define" a nwfilter.
Why is that? The only thing (aside from a syntax error) that would
cause
nwfilter-define to fail when the filter already exists would be if you
tried to define the filter with the same name but different (or
non-existent) uuid, or vice versa. As long as the new definition has
the
same name and uuid, there should be no problem.
If you're relying on libvirt to provide the uuid when the filter is
originally defined, just modify your "update" script to do virsh
nwfilter-dumpxml to read the current text of the filter, modify that
text, then send the result to virsh nwfilter-define (that's exactly
what
virsh nwfilter-edit does).
I must first 'virsh
nwfilter-undefine' then 'virsh nwfilter-define', or else use 'virsh
nwfilter-edit'. The problem being, I cannot use nwfilter-edit from a
script :/
My real problem is that if I want to add to and/or adjust a filter for
a
VM, I basically have to call 'virsh update-device ...' which
unfortunately leaves the VM wide-open for a short period of time,
which
is very undesirable.
I wonder if there's a way to edit the nwfilter _without_ libvirt
having
to drop the filter for the VM before applying any changes.
If this really doesn't work when using the same name and uuid as the
original nwfilter, please reply with the exact error message you
receive, along with the output of virsh nwfilter-dumpxml prior to the
attempt at redefinition, and the text you are sending that results in a
failed nwfilter-define.
You're absolutely correct! It must've been bc I allowed libvirt to
define the UUID, which I was not adding to my xml for the update. After
dumping the live rule and making changes to that xml, then defining
again, it worked as expected, thank you for checking me on that.
Also discovered that when I do it this way, the ebtables rules aren't
actually dropped as I thought was the case. Thanks for your help!
--
Andre Goree
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Email - andre at drenet.net
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