# \[Solved\] OpenNebula 5.0.1 - Migrate Failed

**URL:** <https://forum.opennebula.io/t/solved-opennebula-5-0-1-migrate-failed/2595>\
**Category:** Product Support\
**Created:** [July 19, 2016, 5:51pm UTC](https://forum.opennebula.io/t/solved-opennebula-5-0-1-migrate-failed/2595 "2016-07-19T17:51:52Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Yannick\_MOLINET](https://avatars.discourse-cdn.com/v4/letter/y/ea666f/32.png) [@Yannick\_MOLINET](https://forum.opennebula.io/u/Yannick_MOLINET)\
**Post date:** [July 19, 2016, 5:51pm UTC](https://forum.opennebula.io/t/solved-opennebula-5-0-1-migrate-failed/2595/1 "2016-07-19T17:51:52Z")

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HI all,

I’m just install a fresh OpenNebula 5.0.1 on a three nodes cluster.  
I can launch VM without any problem, but when I try to migrate from one host to another, it’s failed.  
The System DataStore and Image DataStore are QCOW2 (to use symlink from host to the SAN LUN).

Below the log  
`Tue Jul 19 19:42:32 2016 [Z0][VM][I]: New LCM state is MIGRATE Tue Jul 19 19:42:32 2016 [Z0][VMM][I]: Successfully execute transfer manager driver operation: tm_premigrate. Tue Jul 19 19:42:32 2016 [Z0][VMM][I]: ExitCode: 0 Tue Jul 19 19:42:32 2016 [Z0][VMM][I]: Successfully execute network driver operation: pre. Tue Jul 19 19:42:32 2016 [Z0][VMM][I]: Command execution fail: cat << EOT | /var/tmp/one/vmm/kvm/migrate 'one-4' 'adnpvirt07' 'adnpvirt13' 4 adnpvirt13 Tue Jul 19 19:42:32 2016 [Z0][VMM][E]: migrate: Command "virsh --connect qemu:///system migrate --live one-4 qemu+ssh://adnpvirt07/system" failed: error: Cannot access storage file '/var/lib/one//datastores/0/4/disk.1' (as uid:9869, gid:9869): Aucun fichier ou dossier de ce type Tue Jul 19 19:42:32 2016 [Z0][VMM][E]: Could not migrate one-4 to adnpvirt07 Tue Jul 19 19:42:32 2016 [Z0][VMM][I]: ExitCode: 1 Tue Jul 19 19:42:32 2016 [Z0][VMM][I]: Successfully execute transfer manager driver operation: tm_failmigrate. Tue Jul 19 19:42:32 2016 [Z0][VMM][I]: Failed to execute virtualization driver operation: migrate. Tue Jul 19 19:42:32 2016 [Z0][VMM][E]: Error live migrating VM: Could not migrate one-4 to adnpvirt07 Tue Jul 19 19:42:32 2016 [Z0][VM][I]: New LCM state is RUNNING Tue Jul 19 19:42:33 2016 [Z0][LCM][I]: Fail to live migrate VM. Assuming that the VM is still RUNNING (will poll VM).`  
Thanks for help  
Yannick

Add 1 : Disk.1 is the context image.  
Add 2 : Migrate show as Succes when VM is POWEROFF. but boot failed with this log  
\> Tue Jul 19 20:10:50 2016 [Z0][VMM][I]: Command execution fail: cat \<\< EOT | /var/tmp/one/vmm/kvm/deploy ‘/var/lib/one//datastores/0/4/deployment.13’ ‘adnpvirt07’ 4 adnpvirt07  
\> Tue Jul 19 20:10:50 2016 [Z0][VMM][I]: error: Failed to create domain from /var/lib/one//datastores/0/4/deployment.13  
\> Tue Jul 19 20:10:50 2016 [Z0][VMM][I]: error: Cannot access storage file ‘/var/lib/one//datastores/0/4/disk.0’ (as uid:9869, gid:9869): Aucun fichier ou dossier de ce type  
\> Tue Jul 19 20:10:50 2016 [Z0][VMM][E]: Could not create domain from /var/lib/one//datastores/0/4/deployment.13  
\> Tue Jul 19 20:10:50 2016 [Z0][VMM][I]: ExitCode: 255  
\> Tue Jul 19 20:10:50 2016 [Z0][VMM][I]: Failed to execute virtualization driver operation: deploy.  
\> Tue Jul 19 20:10:50 2016 [Z0][VMM][E]: Error deploying virtual machine: Could not create domain from /var/lib/one//datastores/0/4/deployment.13  
\> Tue Jul 19 20:10:50 2016 [Z0][VM][I]: New state is POWEROFF  
\> Tue Jul 19 20:10:50 2016 [Z0][VM][I]: New LCM state is LCM\_INIT

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**Author:** ![atodorov\_storpool](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.opennebula.io/atodorov_storpool/32/5327_2.png) [@atodorov\_storpool](https://forum.opennebula.io/u/atodorov_storpool)\
**Post date:** [July 20, 2016, 6:58am UTC](https://forum.opennebula.io/t/solved-opennebula-5-0-1-migrate-failed/2595/2 "2016-07-20T06:58:27Z")

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Hi Yannick,

It looks like your system datastore is not on shared file system.

did you follow these instructions?

[http://docs.opennebula.org/5.0/deployment/open\_cloud\_storage\_setup/fs\_ds.html#shared-qcow2-transfer-modes](http://docs.opennebula.org/5.0/deployment/open_cloud_storage_setup/fs_ds.html#shared-qcow2-transfer-modes)

Kind Regards,  
Anton Todorov

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**Author:** ![Yannick\_MOLINET](https://avatars.discourse-cdn.com/v4/letter/y/ea666f/32.png) [@Yannick\_MOLINET](https://forum.opennebula.io/u/Yannick_MOLINET)\
**Post date:** [July 20, 2016, 7:39am UTC](https://forum.opennebula.io/t/solved-opennebula-5-0-1-migrate-failed/2595/3 "2016-07-20T07:39:55Z")

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Hi Anton,

Thanks for your answer.  
In fact, I passed a lot of time to understand all OpenNebula mechanisms, especially for the storage.  
I understund that QCow2 driver enable to link an image to the image datastore but not that the system datastore must be also shared.  
What is the best pratice ? GlusterFS in réplication mode ? Only on KVM Host, not on the one server ?

Thanks,  
Yannick

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**Author:** ![silbogg](https://avatars.discourse-cdn.com/v4/letter/s/c68b51/32.png) [@silbogg](https://forum.opennebula.io/u/silbogg)\
**Post date:** [July 20, 2016, 2:15pm UTC](https://forum.opennebula.io/t/solved-opennebula-5-0-1-migrate-failed/2595/4 "2016-07-20T14:15:05Z")

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Hi Yannick,

try system ds as shared and image ds as qcow2. It should work…

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<div class="post-metadata">

**Author:** ![Yannick\_MOLINET](https://avatars.discourse-cdn.com/v4/letter/y/ea666f/32.png) [@Yannick\_MOLINET](https://forum.opennebula.io/u/Yannick_MOLINET)\
**Post date:** [July 20, 2016, 3:05pm UTC](https://forum.opennebula.io/t/solved-opennebula-5-0-1-migrate-failed/2595/5 "2016-07-20T15:05:19Z")

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As Anton mentionned, I have set a GlusterFS replication between all kvm host of the system datastore (keeping qcow2 driver). It’s perfectly working.