Marcelo Lima created CLOUDSTACK-10128:
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Summary: Template from snapshot not merging vhd files
Key: CLOUDSTACK-10128
URL: https://issues.apache.org/jira/browse/CLOUDSTACK-10128
Project: CloudStack
Issue Type: Bug
Security Level: Public (Anyone can view this level - this is the default.)
Components: Management Server
Affects Versions: 4.5.2.2, 4.10.0.0, 4.9.2.0, 4.9.3.0
Environment: Production environment running ACS 4.5.2.2, 4.9.2.0,
4.9.3.0
XenServer 6.5
Primary Storage NFS and ISCSI
Fresh install running 4.5.2.2, 4.9.2.0, 4.9.3.0 and 4.10
Reporter: Marcelo Lima
Priority: Critical
If we have two or more snapshots of a ROOT disk and try to create a template
from differencial snapshots, CloudStack not merging the vhd files on secondary
storage.
Steps to reproduce
1. Create virtual machine - OK
2. Create a manual snapshot from ROOT volume - OK
The vhd of first snapshot (snapshot-base) is stored on secondary storage
correctly
[root@acs01 6]# ls -l
/exports/secondary/snapshots/2/6/011a7650-a13f-4332-8c72-2428a002affc.vhd
-rw-r--r-- 1 root root 1767191040 Nov 1 12:12
/exports/secondary/snapshots/2/6/011a7650-a13f-4332-8c72-2428a002affc.vhd
[root@acs01 6]# md5sum
/exports/secondary/snapshots/2/6/011a7650-a13f-4332-8c72-2428a002affc.vhd
240e5e424552d44b5d297895b064beee
/exports/secondary/snapshots/2/6/011a7650-a13f-4332-8c72-2428a002affc.vhd
3. Create a template from snapshot-base - OK
[root@acs01 6]# ls -l
/exports/secondary/template/tmpl/2/206/be3311d9-8e59-4240-968d-73d7a6eecfdd.vhd
-rw-r--r-- 1 root root 1767191040 Nov 1 12:17
/exports/secondary/template/tmpl/2/206/be3311d9-8e59-4240-968d-73d7a6eecfdd.vhd
[root@acs01 6]# md5sum
/exports/secondary/template/tmpl/2/206/be3311d9-8e59-4240-968d-73d7a6eecfdd.vhd
240e5e424552d44b5d297895b064beee
/exports/secondary/template/tmpl/2/206/be3311d9-8e59-4240-968d-73d7a6eecfdd.vhd
This template from snapshot-base boot normally
4. Create new file (1GB) on ROOT volume
5. Create new snapshot (snapshot-diff) from ROOT volume - OK
[root@acs01 6]# ls -l /exports/secondary/snapshots/2/6/
total 2840056
-rw-r--r-- 1 root root 1767191040 Nov 1 12:12
011a7650-a13f-4332-8c72-2428a002affc.vhd <- snapshot-base
-rw-r--r-- 1 root root 1141019136 Nov 1 12:21
1503adaa-4f6e-4f9c-8d80-68663baa86b8.vhd <- snapshot-diff
6. Create a template from second snapshot - NOK
[root@acs01 6]# ls -lh
/exports/secondary/template/tmpl/2/207/4c5c51a1-fcb4-4cc8-8f97-1664a63af262.vhd
-rw-r--r-- 1 root root 1141019136 Nov 1 12:30
/exports/secondary/template/tmpl/2/207/4c5c51a1-fcb4-4cc8-8f97-1664a63af262.vhd
CloudStack not merging snapshot-base and snapshot-diff. Template from second
snapshot is corrupted because is based just on differential vhd.
Volume from snapshot work very well
1. Create a volume from snapshot-diff - OK
CloudStack merge two snapshots in one file
[root@acs01 primary]# ls -l
/exports/primary/70f1db23-cc59-4ec7-b8d4-ed036228593b.vhd
-rw-r--r-- 1 root root 2843030016 Nov 1 12:34
/exports/primary/70f1db23-cc59-4ec7-b8d4-ed036228593b.vhd
2. Download the new volume to check vhd on secondary storage
[root@acs01 9]# ls -l
/exports/secondary/volumes/2/9/ec6e0f65-bb71-4c91-bac3-287cde2106b7.vhd
-rw-r--r-- 1 root root 2843030016 Nov 1 12:35
/exports/secondary/volumes/2/9/ec6e0f65-bb71-4c91-bac3-287cde2106b7.vhd
We test on 4.5.2.2, 4.9.2.0, 4.9.3.0 and 4.10. XenServer 6.5 with SP1 and
XenServer 6.5 with all patches.
A workaround is create a volume (data-disk) from latest snapshot, create new
snapshot from data-disk and convert to template.
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