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OpenStack: During new Cinder volume creation copying image from Glance takes long time

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Category:
openstack
Specialty:
virt
Last Updated:

Applies to

  • OpenStack Yoga and earlier releases
  • NFS

Issue

When provisioning a new Cinder volume:

  • Volume provisioning can take 10 minutes or more
  • When reviewing the Cinder volume.log, a bulk of the time is spent pulling the Glance image:

2022-07-12 10:58:56.195 190 DEBUG cinder.image.image_utils [req-xxxx] Image fetch details: dest /var/lib/cinder/conversion/image_fetch_1234host@netapp, size 3012.00 MB, duration 544.82 sec fetch /usr/lib/python3.6/site-packages/cinder/image/image_utils.py:465

2022-07-12 10:58:56.195 190 INFO cinder.image.image_utils [req-xxxx] Image download 3012.00 MB at 5.53 MB/s   

  • The above image fetch task took over 9 minutes to complete.

Performing a copy outside of OpenStack takes seconds:

# time cp /var/lib/glance/images/1234-5678-abcd-1234-123456789012 temp/     
                                                                
real    0m4.030s
user    0m0.004s
sys     0m1.495s

 

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