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Bug 2160670 - Cannot replace self-created ovs internal port with another ovs interface
Summary: Cannot replace self-created ovs internal port with another ovs interface
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: nmstate
Version: 9.2
Hardware: Unspecified
OS: Unspecified
high
medium
Target Milestone: rc
: ---
Assignee: Gris Ge
QA Contact: Mingyu Shi
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2023-01-13 09:24 UTC by Mingyu Shi
Modified: 2023-05-09 08:22 UTC (History)
6 users (show)

Fixed In Version: nmstate-2.2.5-1.el9
Doc Type: No Doc Update
Doc Text:
Clone Of:
Environment:
Last Closed: 2023-05-09 07:31:53 UTC
Type: Bug
Target Upstream Version:
Embargoed:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Github nmstate nmstate pull 2203 0 None open ovs: Fix error when adding internal interface 2023-01-20 04:44:56 UTC
Red Hat Issue Tracker NMT-10 0 None None None 2023-01-20 04:45:49 UTC
Red Hat Issue Tracker RHELPLAN-145019 0 None None None 2023-01-13 09:24:50 UTC
Red Hat Product Errata RHBA-2023:2190 0 None None None 2023-05-09 07:32:04 UTC

Description Mingyu Shi 2023-01-13 09:24:10 UTC
Description of problem:
In recent version, when there is no any port mentioned, nmstate will automatically create an internal port whose name is same with the ovs bridge.
Now this self-created port cannot be easily removed.

Version-Release number of selected component (if applicable):
Verified with:
nmstate-2.2.3-3.el9.x86_64
nispor-1.2.9-1.el9.x86_64
NetworkManager-1.41.7-2.el9.x86_64
openvswitch2.15-2.15.0-79.el9fdp.x86_64
DISTRO=RHEL-9.2.0-20230111.33

How reproducible:
100%

Steps to Reproduce:
# step 1
echo "
interfaces:
- name: ovsbr0
  state: up
  type: ovs-bridge
" | nmstatectl apply

# step 2
echo "
interfaces:
- name: ovsbr0
  state: up
  type: ovs-bridge
  bridge:
    port:
    - name: ovs0
" | nmstatectl apply

Actual results:
[2023-01-13T09:14:40Z INFO  nmstate::iface] Include interface ovsbr0 to edit as its controller required so
[2023-01-13T09:14:40Z INFO  nmstate::iface] Interface ovsbr0 cannot live without controller, marking as absent as it has been detached from its original controller ovsbr0
[2023-01-13T09:14:40Z INFO  nmstate::ifaces::inter_ifaces_controller] Creating new OVS internal interface ovs0 to edit as its controller ovsbr0 required so
NmstateError: InvalidArgument: Interface ovs0 cannot be in up state as its parent ovsbr0 has been marked as absent

Expected results:
No failure
Internal port(type: ovs-interface) ovsbr0 is removed, internal port ovs0 is created

Additional info:
Explicitly marking it as absent doesn't work neither:
interfaces:
- name: ovsbr0
  state: up
  type: ovs-bridge
  bridge:
    port:
    - name: ovs0
- name: ovsbr0
  state: absent
  type: ovs-interface
- name: ovs0
  state: up
  type: ovs-interface


But in step 2, if adding a *system* interface without any internal interface, it can work:
interfaces:
- name: ovsbr0
  state: up
  type: ovs-bridge
  bridge:
    port:
    - name: veth0 # a system interface

Comment 1 Gris Ge 2023-01-20 04:44:11 UTC
Patch posted to upstream: https://github.com/nmstate/nmstate/pull/2203

The key reproducer is replace ovs internal interface of a bridge holding same name ovs interface.

The root cause is nmstate incorrect think newly created ovs internal interface is depending the orphan ovs interface(because they are the same name).

Additional fix for this patch is VLAN over ethernet will not be auto-absent when ethernet been marked as absent, because absent ethernet still exists
in kernel, VLAN can still work. This also apply to veth as nmstate cannot tell whether veth will be delete from kernel or not by absent action.
The reason we do that is because nmstate is supporting VLAN over unmanager interface, hence VLAN should not be impacted by its ethernet parent.

Comment 5 Mingyu Shi 2023-01-31 11:54:41 UTC
Verified with:
nmstate-2.2.5-1.el9.x86_64
nispor-1.2.9-1.el9.x86_64
NetworkManager-1.41.90-1.el9.x86_64
openvswitch2.15-2.15.0-79.el9fdp.x86_64
DISTRO=RHEL-9.2.0-20230127.12

Comment 7 errata-xmlrpc 2023-05-09 07:31:53 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (nmstate bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2023:2190


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