Public bug reported: Description =========== When attaching a volume to a running instance the nova-api validates that the volume is not already attached to the instance. However nova-compute is responsible for actually creating the BDM entry in the database. If sending attach requests fast enough it can be possible that the same "attach_volume" request can be sent to nova-compute for the same volume/instance combination.
Steps to reproduce ================== * Create an Instance and a volume * run in 2 terminals in parallel "openstack server add volume <instance> <volume>" * when being fast enough this results in "openstack server show" to report the volume id twice Expected result =============== The volume is attached to the instance just once Actual result ============= The volume is attached to the instance two (or with more parallelity) or more times. Environment =========== 1. Happens on master till queens (possibly also earlier releases) 2. Which hypervisor did you use? Indepentent of Hypervisor, observed with Libvirt 2. Which storage type did you use? Independent of Storage, observed with ceph + nfs 3. Which networking type did you use? Independent of Network, observed with ovs ** Affects: nova Importance: Undecided Assignee: Felix Huettner (felix.huettner) Status: In Progress ** Changed in: nova Assignee: (unassigned) => Felix Huettner (felix.huettner) -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). https://bugs.launchpad.net/bugs/1937375 Title: Duplicate BlockDeviceMapping if attaching volumes too fast Status in OpenStack Compute (nova): In Progress Bug description: Description =========== When attaching a volume to a running instance the nova-api validates that the volume is not already attached to the instance. However nova-compute is responsible for actually creating the BDM entry in the database. If sending attach requests fast enough it can be possible that the same "attach_volume" request can be sent to nova-compute for the same volume/instance combination. Steps to reproduce ================== * Create an Instance and a volume * run in 2 terminals in parallel "openstack server add volume <instance> <volume>" * when being fast enough this results in "openstack server show" to report the volume id twice Expected result =============== The volume is attached to the instance just once Actual result ============= The volume is attached to the instance two (or with more parallelity) or more times. Environment =========== 1. Happens on master till queens (possibly also earlier releases) 2. Which hypervisor did you use? Indepentent of Hypervisor, observed with Libvirt 2. Which storage type did you use? Independent of Storage, observed with ceph + nfs 3. Which networking type did you use? Independent of Network, observed with ovs To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1937375/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : yahoo-eng-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp