poonam-agarwal28 opened a new issue #5660:
URL: https://github.com/apache/cloudstack/issues/5660
##### ISSUE TYPE
* Improvement Request
##### COMPONENT NAME
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CEPH, API
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##### CLOUDSTACK VERSION
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4.15
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##### CONFIGURATION
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Cloudstack 4.15 with KVM Hypervisors and RBD/CEPH as Primary Storage.
Secondary Storage on NFS.
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##### OS / ENVIRONMENT
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CentOS 7.8
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##### SUMMARY
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The current VM deployment process on CEPH as Primary Store runs below
command during the deployment to convert the image to raw and also write to the
CEPH Pool at the same time. This takes huge amount of time eg below has a 15GB
template which took around 3+ Hours. This causes the VM deployment fail due to
Job Timeout
If this process is converted to a 2-Step Process as below
Step 1: Image converted to raw
Step 2: Raw image moved to CEPH either using qemu-img convert or rbd as
below takes much lower time.
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##### STEPS TO REPRODUCE
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Upload a big template with root volume size of 300GB or higher ( NFS as
secondary Store )
Deploy a VM with the template with CEPH as the backend primary store.
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<!-- Paste example playbooks or commands between quotes below -->
~~~
[root@TEST]# time qemu-img convert -p -O raw
/mnt/f268aaee-6090-3fc9-9e9d-41b807bfa8c5.qcow2
rbd:cloudstack/test450:mon_host=VXILAB1-CMON.ceph.local:auth_supported=cephx:id=cloudstack:key=AQDicxxxxxxxxxxxxxxxxFrNxwwxwxw==:rbd_default_format=2:client_mount_timeout=30
(100.00/100%)
real 114m40.176s
user 10m34.924s
sys 4m3.139s
[root@VXIMUM1-CHVZR-2 mnt]# time qemu-img convert -p -O raw
/media/ISETest12.raw
rbd:cloudstack/testimage:mon_host=VXILAB1-CMON.ceph.local:auth_supported=cephx:id=cloudstack:key=AQxxxxxxxxxxxxxxrNDqlJueQ==:rbd_default_format=2:client_mount_timeout=30
(0.00/100%)
(32.02/100%)
(100.00/100%)
real 74m1.770s
user 4m40.347s
sys 11m20.207s
[root@VXIMUM1-CHVZR-1 media]# time rbd import ISETest12.raw --dest-pool
cloudstack
Importing image: 100% complete...done.
real 7m58.793s
user 1m30.641s
sys 2m39.082s
[root@VXIMUM1-CHVZR-2 mnt]# time qemu-img convert -p -O raw
/media/f268aaee-6090-3fc9-9e9d-41b807bfa8c5.qcow2 /media/ISETest12.raw
(100.00/100%)
real 9m3.571s
user 4m8.513s
sys 2m41.161s
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<!-- You can also paste gist.github.com links for larger files -->
##### EXPECTED RESULTS
<!-- What did you expect to happen when running the steps above? -->
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The expected result is that VM deployment on CEPH should complete in a
reasonable time before the job times out.
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##### ACTUAL RESULTS
<!-- What actually happened? -->
<!-- Paste verbatim command output between quotes below -->
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The actual result is that the first time VM deployment on CEPH takes a long
time and eventually times out due to the conversion process being extremely
slow.
~~~
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