[ovirt-users] Problem with data domain link after update to 3.6.2

[Gianluca Cecchi]

Hello,
single physical host with oVirt 3.6.1 on CentOS 7.2
Configured with SH Engine on NFS.
Also NFS iso and NFS data domain present
All 3 NFS are provided by host itself.
2 VMs with CentOS 7.2.

Starting point has all ok in webadmin GUI, also the hosted_storage without
exceptions.

Updated to 3.6.2 following these steps:
On host
- global maintenance

On engine VM
- yum update "ovirt-engine-setup*"
- engine-setup

On host
- exit maintenance

Verified correct access to webadmin GUI again. From GUI
- shutdown of the 2 powered on VMs

On host
- local maintenance

Shutdown of engine VM

On host
yum update
BTW: should I stop vdsmd before running update or not?
reboot
exit maintenance

Verified access to webadmin GUI and all storage domains are shown as up.
But when I try to power on one of the VMs I get this error:

VM racclient1 is down with error. Exit message: Cannot access storage file
'/rhev/data-center/00000001-0001-0001-0001-0000000000ec/556abaa8-0fcc-4042-963b-f27db5e03837/images/d2f2b967-c0c3-4648-9daa-553e8ef4652b/e0524893-1f78-4e6b-8e5e-83217bc0dc5b'
(as uid:107, gid:107): No such file or directory.

Indeed the file, that actually seems to be a symbolic link, doesn't exist
On host:
[root at ractor ~]# ll /rhev/data-center/00000001-0001-0001-0001-0000000000ec
total 0
lrwxrwxrwx. 1 vdsm kvm 99 Jan 27 07:31 2025c2ea-6205-4bc1-b29d-745b47f8f806
->
/rhev/data-center/mnt/ractor.datacenter.mydomain.dom:_SHE__DOMAIN/2025c2ea-6205-4bc1-b29d-745b47f8f806
lrwxrwxrwx. 1 vdsm kvm 99 Jan 27 07:31 fd5754f1-bd00-4337-ad64-1abde35438ae
->
/rhev/data-center/mnt/ractor.datacenter.mydomain.dom:_ISO__DOMAIN/fd5754f1-bd00-4337-ad64-1abde35438ae
lrwxrwxrwx. 1 vdsm kvm 99 Jan 27 07:31 mastersd ->
/rhev/data-center/mnt/ractor.datacenter.mydomain.dom:_SHE__DOMAIN/2025c2ea-6205-4bc1-b29d-745b47f8f806


[root at ractor ~]# ll /rhev/data-center/mnt/
total 0
drwxr-xr-x. 3 vdsm kvm 74 Nov 19 15:47
ractor.datacenter.mydomain.dom:_ISO__DOMAIN
drwxr-xr-x. 3 vdsm kvm 74 Nov 19 15:46
ractor.datacenter.mydomain.dom:_NFS__DOMAIN
drwxr-xr-x. 3 vdsm kvm 74 Nov 19 15:25
ractor.datacenter.mydomain.dom:_SHE__DOMAIN
drwxr-xr-x. 2 vdsm kvm  6 Nov 19 15:25
_var_lib_ovirt-hosted-engine-setup_tmp8InOft

[root at ractor ~]# ll
/rhev/data-center/mnt/ractor.datacenter.mydomain.dom\:_NFS__DOMAIN/556abaa8-0fcc-4042-963b-f27db5e03837/
total 4
drwxr-xr-x.  2 vdsm kvm   69 Nov 19 15:46 dom_md
drwxr-xr-x. 10 vdsm kvm 4096 Dec  4 00:23 images
drwxr-xr-x.  4 vdsm kvm   28 Nov 19 15:47 master

[root at ractor ~]# ll
/rhev/data-center/mnt/ractor.datacenter.mydomain.dom\:_NFS__DOMAIN/556abaa8-0fcc-4042-963b-f27db5e03837/images/
total 32
drwxr-xr-x. 2 vdsm kvm 4096 Dec 10 15:45
3b641c29-5196-4b2f-b1a5-fb31f8064780
drwxr-xr-x. 2 vdsm kvm 4096 Dec  1 12:06
7d5dd44f-f5d1-4984-9e76-2b2f5e42a915
drwxr-xr-x. 2 vdsm kvm 4096 Nov 25 16:34
83799ab5-055f-445c-8b6c-496d19bce921
drwxr-xr-x. 2 vdsm kvm 4096 Nov 29 17:44
9a3fcdf7-75f4-4605-ba34-665dae9a4e0d
drwxr-xr-x. 2 vdsm kvm 4096 Dec  4 00:19
ba11e44c-7cf5-4ef1-a9cd-0a6630bda801
drwxr-xr-x. 2 vdsm kvm 4096 Dec  4 00:22
d2f2b967-c0c3-4648-9daa-553e8ef4652b
drwxr-xr-x. 2 vdsm kvm 4096 Dec 10 15:45
d49f6096-96a2-4ef2-926a-a54a8246d303
drwxr-xr-x. 2 vdsm kvm 4096 Dec  4 00:24
d9d2cd3f-0b1c-4e04-bd6a-1ffafc723344

[root at ractor ~]# ll
/rhev/data-center/mnt/ractor.datacenter.mydomain.dom\:_NFS__DOMAIN/556abaa8-0fcc-4042-963b-f27db5e03837/images/d2f2b967-c0c3-4648-9daa-553e8ef4652b/
total 3338720
-rw-rw----. 1 vdsm kvm 8589934592 Jan 27 06:57
e0524893-1f78-4e6b-8e5e-83217bc0dc5b
-rw-rw----. 1 vdsm kvm    1048576 Dec  4 00:21
e0524893-1f78-4e6b-8e5e-83217bc0dc5b.lease
-rw-r--r--. 1 vdsm kvm        259 Dec  4 00:22
e0524893-1f78-4e6b-8e5e-83217bc0dc5b.meta

Is this problem already known? Should it be sufficent to only create the
symbolic link? What process/service is in charge to create the link?

Gianluca
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