Re: [Users] backups
by Martijn Grendelman
Hi Charles,
> How are you folks doing your hypervisor level backups?
>
> Under ESXi I used GhettoVCB which basically took a snap shot, copied the
> disk image to another location, then deleted the snap.
Thank you for this hint, I didn't know about GhettoVCB and I'm
definately going to have a look at it.
> I haven't been able to find too much information on how this can be done
> with ovirt. I see discussions on the new backup API, but I'm not
> interested in spending big bucks on an enterprise backup solution for a
> home lab.
>
> Only discussion I saw on using snapshots for backups said don't do it
> because the tools don't sync memory when the snapshots are taken.
The problem with snapshot-based backups is, that they are usually only
crash-consistent, meaning that they contain the state of a system's
disks as they would be if you pulled the power plug on a server. If you
restore a system from this type of backup, you would see file system
recovery happening at the first boot, and you risk data loss from -for
example- database servers.
The process that GhettoVCB uses according to your description above is
the same. Your backups are only crash-consistent.
If you need application-level consistency, you need a mechanism to
inform applications that a backup is going to take place (or rather: a
snapshot will be taken) and that they should place themselves in a
consistent state. For example: sync data to disk, flush transaction
logs, stuff like that. Microsoft Windows has VSS for that. For Linux,
there is no such thing (that I know of). Common practice for "quiescing"
database servers and such on Linux is making consistent SQL dumps in a
pre-backup job.
I my case, for most guests a crash-consistent backup, containing a
recent MySQL or PostgreSQL dump is sufficient. I use LVM snapshots (not
oVirt snapshots) for backups, and I use Rsync to transfer the data. I
have been experimenting with Virtsync [1], but I'm having a bit of
trouble with that, so for the moment, it's just Rsync.
Efficiently backing up sparse images with Rsync can be a bit of a
challenge (that's why Virtsync was created in the first place, IIRC),
but using '--sparse' on the inital backup and '--inplace' on subsequent
backups seems to do the trick.
[1] http://www.virtsync.com/
I hope this helps.
Cheers,
Martijn.
11 years
[Users] virtio-rng / crypto inside vms
by Sven Kieske
Hi,
I'm just wondering: How is the state
of the virtio-rng implementation?
I'm asking because I need to regenerate
ssh host keys in newly deployed vms.
(I seem to be the only person, or everybody
else has found the solution, or nobody thinks
about security, or a mixture of the above?)
Additional I found no really guidance
on how much entropy bits should be
available to generate a secure key
inside a vm, beside these numbers:
http://www.ietf.org/rfc/rfc1750.txt
suggests about 128 bits of entropy
for a single cryptographic operation.
various other sources mention ranges
between 100-200 or even at least 4096
entropy bits.
Would it be a workaround to add a virtual
sound device and use this one for /dev/random ?
(But it would be useless if you have no real sound hardware I guess).
Additional when you want to regenerate host keys in e.g. Ubuntu
3 Keys get generated so you need even more entropy to be on the
save side.
If you got any links to best practices or some
good news regarding the state of virtio-rng that would be awesome.
Currently my vms have around 130-160 entropy bits available.
--
Mit freundlichen Grüßen / Regards
Sven Kieske
Systemadministrator
Mittwald CM Service GmbH & Co. KG
Königsberger Straße 6
32339 Espelkamp
T: +49-5772-293-100
F: +49-5772-293-333
https://www.mittwald.de
Geschäftsführer: Robert Meyer
St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen
Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
11 years
Re: [Users] SpiceHTML5, noVNC console and Spice Proxy mixable?
by Nicholas Kesick
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11 years
[Users] SpiceHTML5, noVNC console and Spice Proxy mixable?
by Gianluca Cecchi
Hello,
I already have a thread regarding SpiceHTML5 open and where I'm going
to give further feedback as requested.
In the mean time I would like to ask if the three features in the
subject are completely mixable or not, as in the next days I'm going
to test them all and I would like to start from consistent setup and
not to give wrong answers based on wrong initial setup.
If I understood correctly, both SpiceHTML5 and noVNC console are based
on websocket proxy through the config parameter called WebSocketProxy
and I can consolidate this proxy on the engine . SO that I can in the
same environment use both.
Correct?
Coming then to Spice Proxy, managed by config parameter
"SpiceProxyDefault", my questions are:
- is it mixable with the two above or are they mutually exclusive?
- can I configure the engine itself to be the proxy, installing squid on it?
- If yes, what would be correct parameter for SpiceProxyDefault:
localhost:3128 or engine_hostname.domainname:3128?
If both are ok, I think it is more convenient to use localhost, correct?
Thanks in advance,
Gianluca
11 years
[Users] Can't add networks
by Rob Abshear
I have a brand spanking new installation. Fresh controllers and nodes.
I have imported some machines and have them up and running. However,
when I try to add any more networks to the nodes, I get a failure. The
engine.log is giving the following failure:
2013-12-13 19:48:03,280 INFO
[org.ovirt.engine.core.bll.network.host.SetupNetworksCommand]
(ajp--127.0.0.1-8702-3) Running command: SetupNetworksCommand internal:
false. Entities affected : ID: 185e8be6-5c9f-4ca2-a9b9-2dd49d6e6cfe
Type: VDS
2013-12-13 19:48:03,282 INFO
[org.ovirt.engine.core.vdsbroker.vdsbroker.SetupNetworksVDSCommand]
(ajp--127.0.0.1-8702-3) START, SetupNetworksVDSCommand(HostName =
Out-001, HostId = 185e8be6-5c9f-4ca2-a9b9-2dd49d6e6cfe, force=false,
checkConnectivity=true, conectivityTimeout=120,
networks=[Inside {id=b88e1266-d83f-4753-ac61-0c383f2ce607,
description=Internal connections, comment=null, subnet=null,
gateway=null, type=null, vlanId=null, stp=false,
dataCenterId=5849b030-626e-47cb-ad90-3ce782d831b3, mtu=0,
vmNetwork=true, cluster=NetworkCluster {id={clusterId=null,
networkId=null}, status=OPERATIONAL, display=false, required=false,
migration=false}, providedBy=null, label=null}],
bonds=[],
interfaces=[p2p1 {id=0f6b3543-7622-4d26-aab8-3524cab6b4db,
vdsId=185e8be6-5c9f-4ca2-a9b9-2dd49d6e6cfe, name=p2p1,
macAddress=00:13:3b:0e:08:93, networkName=Inside, bondName=null,
bootProtocol=DHCP, address=, subnet=, gateway=null, mtu=0, bridged=true,
speed=100, type=0, networkImplementationDetails=null},
em1 {id=57dae4a3-ba5a-430a-946e-5f087a33f761,
vdsId=185e8be6-5c9f-4ca2-a9b9-2dd49d6e6cfe, name=em1,
macAddress=00:19:b9:e3:63:e7, networkName=ovirtmgmt, bondName=null,
bootProtocol=STATIC_IP, address=192.168.164.71, subnet=255.255.252.0,
gateway=192.168.165.2, mtu=1500, bridged=true, speed=1000, type=2,
networkImplementationDetails={inSync=true, managed=true}},
em2 {id=df35d1f8-1467-446a-8f93-e507f67379e7,
vdsId=185e8be6-5c9f-4ca2-a9b9-2dd49d6e6cfe, name=em2,
macAddress=00:19:b9:e3:63:e9, networkName=null, bondName=null,
bootProtocol=DHCP, address=, subnet=, gateway=null, mtu=1500,
bridged=false, speed=0, type=0, networkImplementationDetails=null},
p2p2 {id=4b747913-edc3-4f75-9c5b-a11f02f73536,
vdsId=185e8be6-5c9f-4ca2-a9b9-2dd49d6e6cfe, name=p2p2,
macAddress=00:13:3b:0e:08:94, networkName=null, bondName=null,
bootProtocol=DHCP, address=, subnet=, gateway=null, mtu=1500,
bridged=false, speed=1000, type=0, networkImplementationDetails=null}],
removedNetworks=[],
removedBonds=[]), log id: 93c1504
2013-12-13 19:48:03,296 INFO
[org.ovirt.engine.core.vdsbroker.vdsbroker.SetupNetworksVDSCommand]
(ajp--127.0.0.1-8702-3) FINISH, SetupNetworksVDSCommand, log id: 93c1504
2013-12-13 19:50:14,731 ERROR
[org.ovirt.engine.core.vdsbroker.vdsbroker.SetupNetworksVDSCommand]
(ajp--127.0.0.1-8702-3) Failed in SetupNetworksVDS method
2013-12-13 19:50:14,732 ERROR
[org.ovirt.engine.core.vdsbroker.vdsbroker.SetupNetworksVDSCommand]
(ajp--127.0.0.1-8702-3) Error code ERR_FAILED_IFUP and error message
VDSGenericException: VDSErrorException: Failed to SetupNetworksVDS,
error = Determining IP information for Inside... failed.
2013-12-13 19:50:14,735 ERROR
[org.ovirt.engine.core.vdsbroker.vdsbroker.SetupNetworksVDSCommand]
(ajp--127.0.0.1-8702-3)
org.ovirt.engine.core.vdsbroker.vdsbroker.VDSErrorException:
VDSGenericException: VDSErrorException: Failed to SetupNetworksVDS,
error = Determining IP information for Inside... failed.
2013-12-13 19:50:14,737 ERROR
[org.ovirt.engine.core.vdsbroker.vdsbroker.SetupNetworksVDSCommand]
(ajp--127.0.0.1-8702-3) Command SetupNetworksVDS execution failed.
Exception: VDSErrorException: VDSGenericException: VDSErrorException:
Failed to SetupNetworksVDS, error = Determining IP information for
Inside... failed.
2013-12-13 19:50:14,740 ERROR
[org.ovirt.engine.core.bll.network.host.SetupNetworksCommand]
(ajp--127.0.0.1-8702-3) Command
org.ovirt.engine.core.bll.network.host.SetupNetworksCommand throw Vdc
Bll exception. With error message VdcBLLException:
org.ovirt.engine.core.vdsbroker.vdsbroker.VDSErrorException:
VDSGenericException: VDSErrorException: Failed to SetupNetworksVDS,
error = Determining IP information for Inside... failed. (Failed with
error ERR_FAILED_IFUP and code 29)
Any help would be appreciated.
--
*NADA Convention & Expo*: January 24-27, 2014 - New Orleans, LA - Booth
5001
<http://www.bbb.org/south-east-florida/business-reviews/advertising-agenci...><http://www.bbb.org/south-east-florida/business-reviews/advertising-agenci...>
11 years
[Users] Gluster Volume Info won't update
by Andrew Lau
Because of a few issues I had with keepalived, I moved my storage network
to it's own VLAN but it seems to have broken part of the ovirt gluster
management.
Same scenario:
2 Hosts
1x Engine, VDSM, Gluster
1x VDSM,Gluster
So to properly split the gluster data and ovirtmgmt I simply assigned them
two host names and two IPS.
172.16.0.1 (ovirtmgmt) hvx.melb.example.net
172.16.1.1 (gluster) gsx.melb.example.net
However the oVirt engine does not seem to like this, it would not pick up
the gluster volume as "running" until I did a restart through the UI.
The issue (possible bug) I'm seeing is the logs are being filled with
http://www.fpaste.org/59440/13862963/
Volume information isn't being pulled as it thinks the
gs01.melb.example.netis not within the cluster, where in fact it is
but registered under
hv01.melb.example.net
Thanks,
Andrew
11 years
[Users] Redundant Management Servers?
by Michael Kleinpaste
Has anyone tried, or is it possible to set up redundant management servers?
Say, 2 x ovirt-engine pointing to the same or replicated databases?
--
*Michael Kleinpaste*
11 years
[Users] Fwd: disks successfully removed with torage failure message
by Gianluca Cecchi
On Thu, Dec 12, 2013 at 3:24 PM, Vered Volansky wrote:
> Hןת
>
> I'm looking into it now, please send the vdsm log as well, in case I need it too.
>
> Thanks,
> Vered
>
Sorry, I missed the list...
As the VM was powered off, for which host do you need vdsm.log?
The one that has SPM role?
Gianluca
11 years
[Users] oVirt Python SDK: getting the full filenames of disk images
by Исаев Виталий Анатольевич
--_000_69303615BE133645963548DD4A3BFCB3BDB80CE2K7fintechru_
Content-Type: text/plain; charset="koi8-r"
Content-Transfer-Encoding: quoted-printable
Dear ovirt-engine users,
I will be appreciated if someone experienced in oVirt Python SDK could advi=
ce the method of getting the full filename of the VM's disk images in the R=
HEV hypervisor's file system. Can I get filename with a full file system pa=
th from a ovirtsdk.infrastructure.brokers.VMDisk class instance?
If Python SDK (what is preffered) can't provide such an information, may be=
it is still possible with RHEV-M REST API?
Thank you,
Vitaly Isaev
Software engineer
Information security department
Fintech JSC, Moscow, Russia
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<p class=3D"MsoNormal"><span lang=3D"EN-US">Dear ovirt-engine users, <o:p><=
/o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I will be appreciated if someon=
e experienced in oVirt Python SDK could advice the method of getting the fu=
ll filename of the VM’s disk images in the RHEV hypervisor’s fi=
le system. Can I get filename with a full file system
path from a ovirtsdk.infrastructure.brokers.VMDisk class instance?<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">If Python SDK (what is preffere=
d) can’t provide such an information, may be it is still possible wit=
h RHEV-M REST API?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thank you, <o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;mso-f=
areast-language:RU">Vitaly Isaev<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;color=
:gray;mso-fareast-language:RU">Software engineer<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;color=
:gray;mso-fareast-language:RU">Information security department<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;color=
:gray;mso-fareast-language:RU">Fintech JSC, Moscow, Russia<o:p></o:p></span=
></p>
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11 years
