Detailed bug description:
Both Cinder and Glance use NFS as backend. For such scenarios Cinder supports 'NetApp NFS Copy Offload client'(http://docs.openstack.org/juno/config-reference/content/ontap-cluster-nfs.html) to copy images from Glance to Cinder using NFS (unlike regular HTTP downloading from Glance API).
The issue is when offloading tool is configured Cinder downloads image from Glance via HTTP before using offloading tool. So effectively it does the job twice: first it downloads image from Glance using HTTP (converts it ....) and then it downloads image second time using offloading tool.
Steps to reproduce:
Configure NetApp NFS backend for Cinder, specify 2 (or more) NFS shares for NFS backend.
Configure NFS backend for Glance (file backend pointing to NFS mount point).
Create volume `cinder create --image 59cd2153-f892-41e0-b8fa-3bd9cdde16af 40`
Check cinder-volume log:
2016-10-11 11:26:41.819 17653 DEBUG glanceclient.common.http [req-f987f983-ee2e-4886-9f35-945ee9f554b9 8555d82365964315840708d6efdafeae 0ff102a3698842fa89dacf049cf84e40
- - -] curl -g -i -X GET -H 'Accept-Encoding: gzip, deflate' -H 'Accept: */*' -H 'User-Agent: python-glanceclient' -H 'Connection: keep-alive' -H 'X-Auth-Token: {SHA1}52
5561ab8f9c94662aced0187f7b58ce29dc0fa5' -H 'Content-Type: application/octet-stream' http://172.18.54.101:9292/v2/images/59cd2153-f892-41e0-b8fa-3bd9cdde16af/file log_cur
l_request /usr/lib/python2.7/dist-packages/glanceclient/common/http.py:185
2016-10-11 11:26:41.931 17653 DEBUG glanceclient.common.http [req-f987f983-ee2e-4886-9f35-945ee9f554b9 8555d82365964315840708d6efdafeae 0ff102a3698842fa89dacf049cf84e40
- - -]
HTTP/1.1 200 OK
content-length: 8823242752
content-md5: e7f6e7d7d38423a705394ad72fdb823c
connection: close
date: Tue, 11 Oct 2016 11:26:41 GMT
content-type: application/octet-stream
x-openstack-request-id: req-1fe0c5cb-1467-4fb8-bfc7-ee91e278a252
log_http_response /usr/lib/python2.7/dist-packages/glanceclient/common/http.py:199
...
2016-10-11 11:28:32.317 17653 DEBUG cinder.image.image_utils [req-f987f983-ee2e-4886-9f35-945ee9f554b9 8555d82365964315840708d6efdafeae 0ff102a3698842fa89dacf049cf84e40 - - -] Image fetch details: dest /var/lib/cinder/conversion/tmpUgLYML, size 8414.00 MB, duration 110.50 sec fetch /usr/lib/python2.7/dist-packages/cinder/image/image_utils.py:177
and later
2016-10-11 11:28:32.872 17653 DEBUG cinder.volume.flows.manager.create_volume [req-c4980bb2-c286-4739-b0bc-9b87770e225f - - - - -] Attempting download of 59cd2153-f892-41e0-b8fa-3bd9cdde16af ((u'file:///mnt/glance/images/59cd2153-f892-41e0-b8fa-3bd9cdde16af', [{u'url': u'file:///mnt/glance/images/59cd2153-f892-41e0-b8fa-3bd9cdde16af', u'metadata': {u'mountpoint': u'/mnt/glance/images', u'type': u'nfs', u'id': u'NetAppNFS', u'share_location': u'nfs://172.18.52.240/vol_glance/images'}}])) to volume 915ec5e6-73f8-44c5-975c-b5bb4652db96. _copy_image_to_volume /usr/lib/python2.7/dist-packages/cinder/volume/flows/manager/create_volume.py:517
2016-10-11 11:28:32.875 17653 DEBUG cinder.volume.drivers.netapp.dataontap.nfs_cmode [req-c4980bb2-c286-4739-b0bc-9b87770e225f - - - - -] No result found in image cache copy_image_to_volume /usr/lib/python2.7/dist-packages/cinder/volume/drivers/netapp/dataontap/nfs_cmode.py:426
2016-10-11 11:28:32.875 17653 DEBUG cinder.volume.drivers.netapp.dataontap.nfs_cmode [req-c4980bb2-c286-4739-b0bc-9b87770e225f - - - - -] Trying copy from image service using copy offload. _copy_from_img_service /usr/lib/python2.7/dist-packages/cinder/volume/drivers/netapp/dataontap/nfs_cmode.py:502
Example log file https://drive.google.com/open?id=0BzqvkqZNKRGdYWQ1eVhFNkpObGs
Expected results:
Cinder downloads image with ID 59cd2153-f892-41e0-b8fa-3bd9cdde16af dirrectly (via NFS using offloading tool)
Actual result:
Although 'offloading tool' is configured for Cinder and Glance backend is NFS, Cinder downloads image from Glance using HTTP client before using 'offloading tool' (so actually it does the job twice)
Description of the environment
VERSION:
feature_groups:
- mirantis
production: "docker"
release: "8.0"
api: "1.0"
build_number: "570"
build_id: "570"
fuel-nailgun_sha: "558ca91a854cf29e395940c232911ffb851899c1"
python-fuelclient_sha: "4f234669cfe88a9406f4e438b1e1f74f1ef484a5"
fuel-agent_sha: "658be72c4b42d3e1436b86ac4567ab914bfb451b"
fuel-nailgun-agent_sha: "b2bb466fd5bd92da614cdbd819d6999c510ebfb1"
astute_sha: "b81577a5b7857c4be8748492bae1dec2fa89b446"
fuel-library_sha: "c2a335b5b725f1b994f78d4c78723d29fa44685a"
fuel-ostf_sha: "3bc76a63a9e7d195ff34eadc29552f4235fa6c52"
fuel-mirror_sha: "fb45b80d7bee5899d931f926e5c9512e2b442749"
fuelmenu_sha: "78ffc73065a9674b707c081d128cb7eea611474f"
shotgun_sha: "63645dea384a37dde5c01d4f8905566978e5d906"
network-checker_sha: "a43cf96cd9532f10794dce736350bf5bed350e9d"
fuel-upgrade_sha: "616a7490ec7199f69759e97e42f9b97dfc87e85b"
fuelmain_sha: "d605bcbabf315382d56d0ce8143458be67c53434"
some logs are here http://