Re: [ovirt-users] 4.2 downgrade
by Yaniv Kaul
On Sep 30, 2017 8:09 AM, "Ryan Mahoney" <ryan(a)beaconhillentertainment.com>
wrote:
Accidentally upgraded a 4.0 environment to 4.2 (didn't realize the "master"
repo was development repo). What's my chances/best way if possible to roll
back to 4.0 (or 4.1 for that matter).
There is no roll back to oVirt installation.
That being said, I believe the Alpha quality is good. It is not feature
complete and we of course have more polishing to do, but it's very usable
and we will continue to ship updates to it. Let us know promptly what
issues you encounter.
Y.
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6 years, 6 months
DR with oVirt: no data on OVF_STORE
by Luca 'remix_tj' Lorenzetto
Hello,
i'm experimenting a DR architecture that involves block storage
replication from the storage side (EMC VNX 8000).
Our idea is to import the replicated data storage domain on another
datacenter, managed by another engine, with the option "Import Domain"
and then import all the vms contained.
The idea works, but we encountered an issue that we don't want to have
again: we imported an SD and *no* vm were listed in the tab "VM
Import". Disks were available, but no VM informations.
What we did:
- on storage side: split the replica between the main disk in Site A
and the secondary disk Site B
- on storage side: added the disk to the storage group of the
"recovery" cluster
- from engine UI: Imported storage domain, confirming that i want to
activate even if seems to be attached to another DC
- from engine UI: move out from maintenance the storage domain and
click on the "VM Import" tab of the new SD.
What happened: *no* vm were listed
To identify better what's happening, I've found here some indications
on how lvm for block storage works and I identified the command on how
to find and read the OVF_STORE.
Looking inside the OVF_STORE has shown why no vm were listed: it was
empty (no .ovf file listed with tar tvf)
So, without the possibility import vms, i did a rollback, detaching
the storage domain and re-establishing the replication between the
main site and the DR site.
Then, after a day of replications (secondary volume is aligned every
30 minutes), i tried again and i've been able to import also vms
(OVF_STORE was populated).
So my question is: how to i force to have OVF_STORE to be aligned at
least as frequent as the replication? I want to have the VM disks
replicated to the remote site along with VM OVF informations.
Is possible to have OVF_STORE informations aligned when a VM is
created/edited or with a scheduled task? Is this so I/O expensive?
Thank you,
Luca
--
"E' assurdo impiegare gli uomini di intelligenza eccellente per fare
calcoli che potrebbero essere affidati a chiunque se si usassero delle
macchine"
Gottfried Wilhelm von Leibnitz, Filosofo e Matematico (1646-1716)
"Internet è la più grande biblioteca del mondo.
Ma il problema è che i libri sono tutti sparsi sul pavimento"
John Allen Paulos, Matematico (1945-vivente)
Luca 'remix_tj' Lorenzetto, http://www.remixtj.net , <lorenzetto.luca(a)gmail.com>
6 years, 6 months
oVirt 4.2 hosted-engine command damaged
by Julián Tete
I updated my lab environment from oVirt 4.1.x to oVirt 4.2 Alpha
The hosted-engine command has been corrupted
An example:
hosted-engine --vm-status
Traceback (most recent call last):
File "/usr/lib64/python2.7/runpy.py", line 162, in _run_module_as_main
"__main__", fname, loader, pkg_name)
File "/usr/lib64/python2.7/runpy.py", line 72, in _run_code
exec code in run_globals
File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_setup/vm_status.py",
line 213, in <module>
if not status_checker.print_status ():
File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_setup/vm_status.py",
line 110, in print_status
all_host_stats = self._get_all_host_stats ()
File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_setup/vm_status.py",
line 75, in _get_all_host_stats
all_host_stats = ha_cli.get_all_host_stats ()
File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/client/client.py",
line 154, in get_all_host_stats
return self.get_all_stats (self.StatModes.HOST)
File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/client/client.py",
line 99, in get_all_stats
stats = broker.get_stats_from_storage (service)
File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/lib/brokerlink.py",
line 147, in get_stats_from_storage
for host_id, data in six.iteritems (result):
File "/usr/lib/python2.7/site-packages/six.py", line 599, in iteritems
return d.iteritems (** kw)
AttributeError: 'NoneType' object has no attribute 'iteritems'
hosted-engine --set-maintenance --mode = none
Traceback (most recent call last):
File "/usr/lib64/python2.7/runpy.py", line 162, in _run_module_as_main
"__main__", fname, loader, pkg_name)
File "/usr/lib64/python2.7/runpy.py", line 72, in _run_code
exec code in run_globals
File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_setup/set_maintenance.py",
line 88, in <module>
if not maintenance.set_mode (sys.argv [1]):
File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_setup/set_maintenance.py",
line 76, in set_mode
value = m_global,
File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/client/client.py",
line 240, in set_maintenance_mode
str (value))
File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/client/client.py",
line 187, in set_global_md_flag
all_stats = broker.get_stats_from_storage (service)
File
"/usr/lib/python2.7/site-packages/ovirt_hosted_engine_ha/lib/brokerlink.py",
line 147, in get_stats_from_storage
for host_id, data in six.iteritems (result):
File "/usr/lib/python2.7/site-packages/six.py", line 599, in iteritems
return d.iteritems (** kw)
AttributeError: 'NoneType' object has no attribute 'iteritems'
hosted-engine --vm-start
VM exists and its status is Up
Hardware
Manufacturer: HP
Family: ProLiant
Product Name: ProLiant BL460c Gen8
CPU Model Name: Intel (R) Xeon (R) CPU E5-2667 v2 @ 3.30GHz
CPU Type: Intel SandyBridge Family
CPU Sockets: 2
CPU Cores per Socket: 8
CPU Threads per Core: 2 (SMT Enabled)
Software:
OS Version: RHEL - 7 - 4.1708.el7.centos
OS Description: CentOS Linux 7 (Core)
Kernel Version: 4.12.0 - 1.el7.elrepo.x86_64
KVM Version: 2.9.0 - 16.el7_4.5.1
LIBVIRT Version: libvirt-3.2.0-14.el7_4.3
VDSM Version: vdsm-4.20.3-95.git0813890.el7.centos
SPICE Version: 0.12.8 - 2.el7.1
GlusterFS Version: glusterfs-3.12.1-2.el7
CEPH Version: librbd1-0.94.5-2.el7
6 years, 6 months
