openstack
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neutron
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[Docs] Add info about how to use shared SG with VMs 

This patch adds info about workaround how to spawn VM using Security
Groups shared through RBAC mechanism in Neutron.
Proper fix for that issue will require changes in the Neutron API and in
Nova so will not be possible to backport.

Related-bug: #1942615
Change-Id: Iadb3fe0ca8fa9c14ec2912016bd3912e5dcee5ff
This commit is contained in:
Slawek Kaplonski 2021-09-08 15:41:29 +02:00
parent d1a89af312
commit a383afa10f
1 changed files with 20 additions and 0 deletions
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20
doc/source/admin/config-rbac.rst
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@ -284,6 +284,26 @@ This process can be repeated any number of times to share a security-group
with an arbitrary number of projects.
Creating an instance which uses a security group shared through RBAC, but only
specifying the network ID when calling Nova will not work currently. In such
cases Nova will check if the given security group exists in Neutron before it
creates a port in the given network. The problem with that is that Nova asks
only for the security groups filtered by the project_id thus it will not get
the shared security group back from the Neutron API. See `bug 1942615
<https://bugs.launchpad.net/neutron/+bug/1942615>`__ for details.
To workaround the issue, the user needs to create a port in Neutron first, and
then pass that port to Nova:
.. code-block:: console
$ openstack port create --network net1 --security-group
5ba835b7-22b0-4be6-bdbe-e0722d1b5f24 shared-sg-port
$ openstack server create --image cirros-0.5.1-x86_64-disk --flavor m1.tiny
--port shared-sg-port vm-with-shared-sg
Sharing an address scope with specific projects
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~