Public bug reported: Summary: This issue is observed intermittently on Jenkins gate and sometimes in local setup for Tacker project. The error has been observed for create VNF request workflow.
Steps: The create VNF request internally uses a heat HOT template to create a nova instance using the below HOT template: http://paste.openstack.org/show/478592/ Actual behavior: >From the n-cpu.log it is observed that there are duplicate bridges create in >the qemu xml file for the 3 network interfaces. http://logs.openstack.org/00/219000/9/experimental/gate-tacker-dsvm-functional/ec3b2c8/logs/screen-n-cpu.txt.gz?level=ERROR Observation: The 1st network interface for the nova instance is a Neutron Port resource provided in HOT template. Nova sends a PUT request to update the port information. It also sends 2 POST requests for the 2nd and 3rd network interfaces. Neutron receives the PUT request and sends network-event changed event while nova is still waiting for the POST response for the 2 ports. http://logs.openstack.org/00/219000/9/experimental/gate-tacker-dsvm-functional/ec3b2c8/logs/screen-q-svc.txt.gz#_2015-09-29_06_42_46_545 If the network-changed event is received before the 3rd port POST response is received, refresh_cache is acquired by nova_service at: http://logs.openstack.org/00/219000/9/experimental/gate-tacker-dsvm-functional/ec3b2c8/logs/screen-n-cpu.txt.gz#_2015-09-29_06_42_46_760 Nova sends a query for port information, updates the cache and release the lock. By then, POST requests are completed which acquires the cache lock again and sends request for network info. refresh_cache is updated twice and contains duplicate set of ports Network vifs are built for all 6 ports and qemu xml is build based on that. Duplicate bridges in xml is complained by libvirt as device or resource busy. Version and environment: Devstack Master ** Affects: neutron Importance: Undecided Status: New ** Affects: nova Importance: Undecided Status: New ** Affects: tacker Importance: Undecided Status: New ** Also affects: tacker Importance: Undecided Status: New ** Also affects: nova Importance: Undecided Status: New -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to neutron. https://bugs.launchpad.net/bugs/1515768 Title: Instance creation fails with libvirtError: Unable to create tap device: Device or resource busy Status in neutron: New Status in OpenStack Compute (nova): New Status in tacker: New Bug description: Summary: This issue is observed intermittently on Jenkins gate and sometimes in local setup for Tacker project. The error has been observed for create VNF request workflow. Steps: The create VNF request internally uses a heat HOT template to create a nova instance using the below HOT template: http://paste.openstack.org/show/478592/ Actual behavior: From the n-cpu.log it is observed that there are duplicate bridges create in the qemu xml file for the 3 network interfaces. http://logs.openstack.org/00/219000/9/experimental/gate-tacker-dsvm-functional/ec3b2c8/logs/screen-n-cpu.txt.gz?level=ERROR Observation: The 1st network interface for the nova instance is a Neutron Port resource provided in HOT template. Nova sends a PUT request to update the port information. It also sends 2 POST requests for the 2nd and 3rd network interfaces. Neutron receives the PUT request and sends network-event changed event while nova is still waiting for the POST response for the 2 ports. http://logs.openstack.org/00/219000/9/experimental/gate-tacker-dsvm-functional/ec3b2c8/logs/screen-q-svc.txt.gz#_2015-09-29_06_42_46_545 If the network-changed event is received before the 3rd port POST response is received, refresh_cache is acquired by nova_service at: http://logs.openstack.org/00/219000/9/experimental/gate-tacker-dsvm-functional/ec3b2c8/logs/screen-n-cpu.txt.gz#_2015-09-29_06_42_46_760 Nova sends a query for port information, updates the cache and release the lock. By then, POST requests are completed which acquires the cache lock again and sends request for network info. refresh_cache is updated twice and contains duplicate set of ports Network vifs are built for all 6 ports and qemu xml is build based on that. Duplicate bridges in xml is complained by libvirt as device or resource busy. Version and environment: Devstack Master To manage notifications about this bug go to: https://bugs.launchpad.net/neutron/+bug/1515768/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
