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Message #90097
[Bug 1915341] Re: neutron-linuxbridge-agent not starting due to nf_tables rules
** Changed in: neutron
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1915341
Title:
neutron-linuxbridge-agent not starting due to nf_tables rules
Status in neutron:
Fix Released
Bug description:
* Description
When restarting neutron-linuxbridge-agent it fails, because it cannot remove nf_tables chains
* Pre-conditions
Openstack Ussuri on Ubuntu 20.04 installed as described in https://docs.openstack.org/install-guide on real hardware.
* reproduction steps
When you remove an instance there seem to remain some rules in neutronARP-* and neutronMAC-* tables. When restarting neutron-linuxbridge-agent then, it fails:
neutron_lib.exceptions.ProcessExecutionError: Exit code: 4; Stdin: ; Stdout: ; Stderr: ebtables v1.8.4 (nf_tables): CHAIN_USER_DEL failed (Device or resource busy): chain neutronARP-tap0a9b5e3a-21
INFO neutron.plugins.ml2.drivers.agent._common_agent [-] Stopping Linux bridge agent agent.
After flushing these chains the agent can be started.
# openstack --version
openstack 5.2.0
* severity: blocker
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References