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Automated users/groups creation and updating them
by Alexis HAUSER 01 Jun '16

01 Jun '16

Hi, I'm trying to find what are the different ways / approaches to automated users/groups creation, based on a LDAP/AD database. This is my first problematic : when a LDAP/AD provider is joined, and a user is created in ovirt from this provider, the user heritates a part of the attributes from this LDAP database. Now if I change one attribute on the LDAP side (for example "first name"), it isn't updated on the ovirt user. Would there be other way to update this information than creating / deleting the user ? My second problematic is what should I use to automate creation of users. It seems possible with : - shell scripting : using ovirt-aaa-jdbc-tool - python SDK - java SDK - rest API Which one of these approaches would be the most simple ? I'm more familiar with shell scripting than other languages. That would be nice to find a way with it. Concerning ovirt-aaa-jdbc-tool, I've heard it was only adding/deleting users from the internal DB, not the others. In that case, is there a way in shell scripting to interact with other profiles than internal ? Is there files somewhere containing users and their informations I could modify ? What would happen if a user is in use and it is modified/deleted at the same time ? I know it makes a lot of questions, but I can't really get started before having those answers.

2 1

Hiding extended user interface
by Alexis HAUSER 01 Jun '16

01 Jun '16

Hi, Is there a way to hide the "extended" user interface, and show only the "basic" one ? Is it also possible to show only the extended and hide the basic ?

2 1

Ovirt Engine - Wait For Launch
by Maton, Brett 31 May '16

31 May '16

I did a yum update on one of my Ovirt Hosts a few days ago. All of the VM's on that host have been shown in the web UI with a status of 'Wait For Launch'. The VM's all appear to still be up and running but I can't manage/migrate them. Is there anything I can do to clear this issue ? Regards, Brett

2 1

dwhd error: host_interface_samples_history_pkey
by Bill James 31 May '16

31 May '16

Ovirt events keeps saying "ETL service sampling has encountered an error. Please consult the service log for more details." ovirt-engine-dwhd.log says: 2016-05-27 10:55:00|UWxd1W|48u96S|MjrqV0|OVIRT_ENGINE_DWH|StatisticsSync|Default|6|Java Exception|tJDBCOutput_4|org.postgresql.util.PSQLException:ERROR: root page 3 of index "host_interface_samples_history_pkey" has level 0, expected 1|1 Exception in component tJDBCOutput_3 org.postgresql.util.PSQLException: ERROR: current transaction is aborted, commands ignored until end of transaction block at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2157) (see attached) I double checked all my VMs, they all have an interface assigned. Not sure what host_interface_samples_history_pkey is referring to. Thanks.

2 2

What recovers a VM from pause?
by Nicolas Ecarnot 31 May '16

31 May '16

Hello, We're planning a move from our old building towards a new one a few meters away. In a similar way of Martijn (https://www.mail-archive.com/users@ovirt.org/msg33182.html) I have maintenance planed on our storage side. Say an oVirt DC is using a SAN's LUN via iSCSI (Equallogic). This SAN allows me to setup block replication between two SANs, seen by oVirt as one (Dell is naming it SyncRep). Then switch all the iSCSI accesses to the replicated LUN. When doing this, the iSCSI stack of each oVirt host notices the de-connection, tries to reconnect, and succeeds. Amongst our hosts, this happens between 4 and 15 seconds. When this happens fast enough, oVirt engine and the VMs don't even notice, and they keep running happily. When this takes more than 4 seconds, there are 2 cases : 1 - The hosts and/or oVirt and/or the SPM (I actually don't know) notices that there is a storage failure, and pauses the VMs. When the iSCSI stack reconnects, the VMs are automatically recovered from pause, and this all takes less than 30 seconds. That is very acceptable for us, as this action is extremely rare. 2 - Same storage failure, VMs paused, and some VMs stay in pause mode forever. Manual "run" action is mandatory. When done, everything recovers correctly. This is also quite acceptable, but here come my questions : My questions : (!) - *WHAT* process or piece of code or what oVirt parts is responsible for deciding when to UN-pause a VM, and at what conditions? That would help me to understand why some cases are working even more smoothly than others. - Are there related timeouts I could play with in engine-config options? - [a bit off-topic] Is it safe to increase some iSCSI timeouts of buffer-sizes in the hope this kind of disconnection would get un-noticed? -- Nicolas ECARNOT

6 8

Re: [ovirt-users] How to automate the ovirt host deployment?
by Karli Sjöberg 31 May '16

31 May '16

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5 6

Can't perform search after setting up an Active Directory
by Alexis HAUSER 31 May '16

31 May '16

Hi, I added an Active Directory server to RHEV, but I can't perform any search and I don't see any namespace in the interface. I'm able to perform search using with the same search user DN / passwd and certificate : LDAPTLS_CACERT=/somewhere/myca.pem ldapsearch -H ldaps://myserver.com -x -D 'CN=Something,DC=myserver,DC=come' -w 'mypaswd' -b 'CN=users,DC=something,DC=com' in the engine.log, if I grep warn, I can see the following messages : 2016-05-25 05:54:55,840 WARN [org.ovirt.engine.core.bll.SearchQuery] (ajp-/127.0.0.1:8702-3) [] Illegal search: ADUSER@AD-authz:undefined: allnames=*: null 2016-05-25 05:54:55,843 WARN [org.ovirt.engine.core.bll.SearchQuery] (ajp-/127.0.0.1:8702-3) [] Illegal search: ADGROUP@AD-authz:undefined: name=*: null 2016-05-25 05:54:58,160 WARN [org.ovirt.engine.core.bll.SearchQuery] (ajp-/127.0.0.1:8702-9) [] Illegal search: ADUSER@AD-authz:undefined: allnames=*: null 2016-05-25 05:54:58,162 WARN [org.ovirt.engine.core.bll.SearchQuery] (ajp-/127.0.0.1:8702-9) [] Illegal search: ADGROUP@AD-authz:undefined: name=*: null I also tried adding the following configuration but it didn't solve my problem : sequence-init.init.100-my-basedn-init-vars = my-basedn-init-vars sequence.my-basedn-init-vars.010.description = set baseDN sequence.my-basedn-init-vars.010.type = var-set sequence.my-basedn-init-vars.010.var-set.variable = simple_baseDN sequence.my-basedn-init-vars.010.var-set.value = CN=Users,DC=something,DC=com Any ideas ? By the way, if I didn't rename my .profile and auth* files from my LDAP configuration, I had the LDAP namespace suggested by the web interface in my AD domain when trying to perform a search. Is that a bug ?

3 29

listing domains fails
by Fabrice Bacchella 31 May '16

31 May '16

--Apple-Mail=_943A44EE-DB36-4E2B-A9A5-F7AE7F010E4A Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii I'm trying to list domains using the api, and I'm getting a strange = message : > GET /api/storagedomains;case_sensitive=3DTrue HTTP/1.1 ... > Version: 3 > Content-Type: application/xml > Accept: application/xml > Filter: False > Prefer: persistent-auth > Content-Length: 0 < HTTP/1.1 404 Not Found < <?xml version=3D"1.0" encoding=3D"UTF-8" standalone=3D"yes"?> < <fault> < <reason>Operation Failed</reason> < <detail>Entity not found: Storage server connection: = id=3D6860d96f-557e-4d82-a209-401d72bd6e16</detail> < </fault> And in engine.log, I got: Before: 2016-05-30 13:07:31,017 INFO = [org.ovirt.engine.core.vdsbroker.vdsbroker.DisconnectStorageServerVDSComma= nd] (default task-25) [4c2e1822] START, = DisconnectStorageServerVDSCommand(HostName =3D ng320, = StorageServerConnectionManagementVDSParameters:{runAsync=3D'true', = hostId=3D'4426ed42-0805-43b1-92d9-3e5a680eaf38', = storagePoolId=3D'00000000-0000-0000-0000-000000000000', = storageType=3D'LOCALFS', = connectionList=3D'[StorageServerConnections:{id=3D'6860d96f-557e-4d82-a209= -401d72bd6e16', connection=3D'/data/ovirt/data', iqn=3D'null', = vfsType=3D'null', mountOptions=3D'null', nfsVersion=3D'null', = nfsRetrans=3D'null', nfsTimeo=3D'null', iface=3D'null', = netIfaceName=3D'null'}]'}), log id: 63f890 ... 2016-05-30 13:07:32,312 INFO = [org.ovirt.engine.core.vdsbroker.vdsbroker.DisconnectStorageServerVDSComma= nd] (default task-25) [4c2e1822] FINISH, = DisconnectStorageServerVDSCommand, return: = {6860d96f-557e-4d82-a209-401d72bd6e16=3D0}, log id: 63f890 When I run the command: 2016-05-31 15:34:11,259 ERROR = [org.ovirt.engine.api.restapi.resource.AbstractBackendResource] (default = task-13) [] Operation Failed: Entity not found: Storage server = connection: id=3D6860d96f-557e-4d82-a209-401d72bd6e16 What's wrong ?= --Apple-Mail=_943A44EE-DB36-4E2B-A9A5-F7AE7F010E4A Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii <html><head><meta http-equiv=3D"Content-Type" content=3D"text/html = charset=3Dus-ascii"></head><body style=3D"word-wrap: break-word; = -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" = class=3D"">I'm trying to list domains using the api, and I'm getting a = strange message :<div class=3D""><br class=3D""></div><div class=3D""><div= style=3D"margin: 0px;" class=3D""><font face=3D"Menlo" = style=3D"font-size: 11px;" class=3D"">> GET = /api/storagedomains;case_sensitive=3DTrue = HTTP/1.1</font></div></div><div class=3D""><font face=3D"Menlo" = style=3D"font-size: 11px;" class=3D"">...</font></div><div class=3D""><div= style=3D"margin: 0px;" class=3D""><font face=3D"Menlo" = style=3D"font-size: 11px;" class=3D"">> Version: 3</font></div><div = style=3D"margin: 0px;" class=3D""><font face=3D"Menlo" style=3D"font-size:= 11px;" class=3D"">> Content-Type: application/xml</font></div><div = style=3D"margin: 0px;" class=3D""><font face=3D"Menlo" style=3D"font-size:= 11px;" class=3D"">> Accept: application/xml</font></div><div = style=3D"margin: 0px;" class=3D""><font face=3D"Menlo" style=3D"font-size:= 11px;" class=3D"">> Filter: False</font></div><div style=3D"margin: = 0px;" class=3D""><font face=3D"Menlo" style=3D"font-size: 11px;" = class=3D"">> Prefer: persistent-auth</font></div><div style=3D"margin: = 0px;" class=3D""><font face=3D"Menlo" style=3D"font-size: 11px;" = class=3D"">> Content-Length: 0</font></div></div><div class=3D""><font = face=3D"Menlo" style=3D"font-size: 11px;" class=3D""><br = class=3D""></font></div><div class=3D""><div style=3D"margin: 0px;" = class=3D""><font face=3D"Menlo" style=3D"font-size: 11px;" class=3D""><= HTTP/1.1 404 Not Found</font></div></div><div class=3D""><div = style=3D"margin: 0px;" class=3D""><font face=3D"Menlo" style=3D"font-size:= 11px;" class=3D"">< <?xml version=3D"1.0" encoding=3D"UTF-8" = standalone=3D"yes"?></font></div><div style=3D"margin: 0px;" = class=3D""><font face=3D"Menlo" style=3D"font-size: 11px;" class=3D""><= <fault></font></div><div style=3D"margin: 0px;" class=3D""><font = face=3D"Menlo" style=3D"font-size: 11px;" class=3D""><     = <reason>Operation Failed</reason></font></div><div = style=3D"margin: 0px;" class=3D""><font face=3D"Menlo" style=3D"font-size:= 11px;" class=3D""><     <detail>Entity not found: = Storage server connection: = id=3D6860d96f-557e-4d82-a209-401d72bd6e16</detail></font></div><div = style=3D"margin: 0px;" class=3D""><font face=3D"Menlo" style=3D"font-size:= 11px;" class=3D"">< </fault></font></div></div><div = class=3D""><br class=3D""></div><div class=3D"">And in engine.log, I = got:</div><div class=3D"">Before:</div><div class=3D""><font = face=3D"Menlo" class=3D""><span style=3D"font-size: 11px;" = class=3D"">2016-05-30 13:07:31,017 = INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.DisconnectStora= geServerVDSCommand] (default task-25) [4c2e1822] START, = DisconnectStorageServerVDSCommand(HostName =3D ng320, = StorageServerConnectionManagementVDSParameters:{runAsync=3D'true', ho= stId=3D'4426ed42-0805-43b1-92d9-3e5a680eaf38', = storagePoolId=3D'00000000-0000-0000-0000-000000000000', = storageType=3D'LOCALFS', connectionList=3D'[StorageServerConnections:= {id=3D'6860d96f-557e-4d82-a209-401d72bd6e16', = connection=3D'/data/ovirt/data', iqn=3D'null', vfsType=3D'null', = mountOptions=3D'null', nfsVersion=3D'null', nfsRetrans=3D'null', = nfsTimeo=3D'null', iface=3D'null', netIfaceName=3D'null'}]'}), = log id: 63f890<br class=3D"">...</span></font></div><div = class=3D""><div style=3D"margin: 0px; font-size: 11px; font-family: = Menlo;" class=3D"">2016-05-30 13:07:32,312 INFO  = [org.ovirt.engine.core.vdsbroker.vdsbroker.DisconnectStorageServerVDSComma= nd] (default task-25) [4c2e1822] FINISH, = DisconnectStorageServerVDSCommand, return: = {6860d96f-557e-4d82-a209-401d72bd6e16=3D0}, log id: 63f890</div><div = style=3D"margin: 0px; font-size: 11px; font-family: Menlo;" class=3D""><br= class=3D""></div><div style=3D"margin: 0px;" class=3D"">When I run the = command:</div><div style=3D"margin: 0px;" class=3D""><font face=3D"Menlo" = style=3D"font-size: 11px;" class=3D"">2016-05-31 15:34:11,259 ERROR = [org.ovirt.engine.api.restapi.resource.AbstractBackendResource] (default = task-13) [] Operation Failed: Entity not found: Storage server = connection: = id=3D6860d96f-557e-4d82-a209-401d72bd6e16</font></div></div><div = style=3D"margin: 0px;" class=3D""><br class=3D""></div><div = style=3D"margin: 0px;" class=3D"">What's wrong ?</div></body></html>= --Apple-Mail=_943A44EE-DB36-4E2B-A9A5-F7AE7F010E4A--

1 0

VMs using hugepages
by Ralf Schenk 31 May '16

31 May '16

This is a multi-part message in MIME format. --------------1F41AA982CD26EC47BC0B407 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Hello, I try to get VM's to use hugepages by default. We use them on our manual VM's set up for libvirt and experience performance advantages. I installed vdsm-hook-hugepages, but according to http://www.ovirt.org/develop/developer-guide/vdsm/hook/hugepages/ I have to set hugepages=SIZE. Engine Web-Fronted doesn't show an option anywhere to specify this. I want the VMs to have: <memoryBacking> <hugepages/> </memoryBacking> Any hint ? Versions: vdsm.noarch 4.17.28-0.el7.centos @ovirt-3.6 vdsm-cli.noarch 4.17.28-0.el7.centos @ovirt-3.6 vdsm-gluster.noarch 4.17.28-0.el7.centos @ovirt-3.6 vdsm-hook-hugepages.noarch 4.17.28-0.el7.centos @ovirt-3.6 vdsm-hook-vmfex-dev.noarch 4.17.28-0.el7.centos @ovirt-3.6 vdsm-infra.noarch 4.17.28-0.el7.centos @ovirt-3.6 vdsm-jsonrpc.noarch 4.17.28-0.el7.centos @ovirt-3.6 vdsm-python.noarch 4.17.28-0.el7.centos @ovirt-3.6 vdsm-xmlrpc.noarch 4.17.28-0.el7.centos @ovirt-3.6 vdsm-yajsonrpc.noarch 4.17.28-0.el7.centos @ovirt-3.6 Engine: ovirt-engine.noarch 3.6.6.2-1.el7.centos @ovirt-3.6 -- *Ralf Schenk* fon +49 (0) 24 05 / 40 83 70 fax +49 (0) 24 05 / 40 83 759 mail *rs(a)databay.de* <mailto:rs@databay.de> *Databay AG* Jens-Otto-Krag-Straße 11 D-52146 Würselen *www.databay.de* <http://www.databay.de> Sitz/Amtsgericht Aachen • HRB:8437 • USt-IdNr.: DE 210844202 Vorstand: Ralf Schenk, Dipl.-Ing. Jens Conze, Aresch Yavari, Dipl.-Kfm. Philipp Hermanns Aufsichtsratsvorsitzender: Klaus Scholzen (RA) ------------------------------------------------------------------------ --------------1F41AA982CD26EC47BC0B407 Content-Type: multipart/related; boundary="------------42116FB0C46FABA6A6982AF7" --------------42116FB0C46FABA6A6982AF7 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit <html> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"> </head> <body bgcolor="#FFFFFF" text="#000000"> <p>Hello,</p> <p>I try to get VM's to use hugepages by default. We use them on our manual VM's set up for libvirt and experience performance advantages. I installed vdsm-hook-hugepages, but according to <a class="moz-txt-link-freetext" href="http://www.ovirt.org/develop/developer-guide/vdsm/hook/hugepages/">http://www.ovirt.org/develop/developer-guide/vdsm/hook/hugepages/</a> I have to set hugepages=SIZE. Engine Web-Fronted doesn't show an option anywhere to specify this. <br> </p> <p>I want the VMs to have:</p> <p><tt> <memoryBacking><br> <hugepages/><br> </memoryBacking><br> </tt><br> </p> <p>Any hint ?<br> </p> <p>Versions:</p> <p><tt>vdsm.noarch 4.17.28-0.el7.centos @ovirt-3.6</tt><tt><br> </tt><tt>vdsm-cli.noarch 4.17.28-0.el7.centos @ovirt-3.6</tt><tt><br> </tt><tt>vdsm-gluster.noarch 4.17.28-0.el7.centos @ovirt-3.6</tt><tt><br> </tt><tt>vdsm-hook-hugepages.noarch 4.17.28-0.el7.centos @ovirt-3.6</tt><tt><br> </tt><tt>vdsm-hook-vmfex-dev.noarch 4.17.28-0.el7.centos @ovirt-3.6</tt><tt><br> </tt><tt>vdsm-infra.noarch 4.17.28-0.el7.centos @ovirt-3.6</tt><tt><br> </tt><tt>vdsm-jsonrpc.noarch 4.17.28-0.el7.centos @ovirt-3.6</tt><tt><br> </tt><tt>vdsm-python.noarch 4.17.28-0.el7.centos @ovirt-3.6</tt><tt><br> </tt><tt>vdsm-xmlrpc.noarch 4.17.28-0.el7.centos @ovirt-3.6</tt><tt><br> </tt><tt>vdsm-yajsonrpc.noarch 4.17.28-0.el7.centos @ovirt-3.6</tt><tt><br> </tt><br> </p> Engine:<br> ovirt-engine.noarch 3.6.6.2-1.el7.centos @ovirt-3.6<br> <br> <div class="moz-signature">-- <br> <p> </p> <table border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td colspan="3"><img src="cid:part1.FD451D75.B4E6C315@databay.de" height="30" border="0" width="151"></td> </tr> <tr> <td valign="top"> <font face="Verdana, Arial, sans-serif" size="-1"><br> <b>Ralf Schenk</b><br> fon +49 (0) 24 05 / 40 83 70<br> fax +49 (0) 24 05 / 40 83 759<br> mail <a href="mailto:rs@databay.de"><font color="#FF0000"><b>rs(a)databay.de</b></font></a><br> </font> </td> <td width="30"> </td> <td valign="top"> <font face="Verdana, Arial, sans-serif" size="-1"><br> <b>Databay AG</b><br> Jens-Otto-Krag-Straße 11<br> D-52146 Würselen<br> <a href="http://www.databay.de"><font color="#FF0000"><b>www.databay.de</b></font></a> </font> </td> </tr> <tr> <td colspan="3" valign="top"> <font face="Verdana, Arial, sans-serif" size="1"><br> Sitz/Amtsgericht Aachen • HRB:8437 • USt-IdNr.: DE 210844202<br> Vorstand: Ralf Schenk, Dipl.-Ing. Jens Conze, Aresch Yavari, Dipl.-Kfm. Philipp Hermanns<br> Aufsichtsratsvorsitzender: Klaus Scholzen (RA) </font> </td> </tr> </tbody> </table> <hr color="#000000" noshade="noshade" size="1" width="100%"> </div> </body> </html> --------------42116FB0C46FABA6A6982AF7 Content-Type: image/gif; name="logo_databay_email.gif" Content-Transfer-Encoding: base64 Content-ID: <part1.FD451D75.B4E6C315(a)databay.de> Content-Disposition: inline; filename="logo_databay_email.gif" R0lGODlhlwAeAMQAAObm5v9QVf/R0oKBgfDw8NfX105MTLi3t/r6+sfHx/+rrf98gC0sLP8L EhIQEKalpf/g4ZmYmHd2dmppaf8uNP/y8v8cIv+Ym//AwkE/P46NjRwbG11cXP8ABwUDA/// /yH5BAAAAAAALAAAAACXAB4AAAX/4CeOYnUJZKqubOu+cCzPNA0tVnfVfO//wGAKk+t0Ap+K QMFUYCDCqHRKJVUWDaPRUsFktZ1G4AKtms9o1gKsFVS+7I5ll67bpd647hPQawNld4KDMQJF bA07F35aFBiEkJEpfXEBjx8KjI0Vkp2DEIdaCySgFBShbEgrCQOtrq+uEQcALQewrQUjEbe8 rgkkD7y5KhMZB3drqSoVFQhdlHGXKQYe1dbX2BvHKwzY1RMiAN7j1xEjBeTmKeIeD3cYCxRf FigvChRxFJwkBBvk5A7cpZhAjgGCDwn+kfslgto4CSoSehh2BwEEBQvowDAUR0EKdArHZTg4 4oDCXBFC/3qj9SEluZEpHnjYQFIGgpo1KgSasYjNKBImrzF4NaFbNgIjCGRQeIyVKwneOLzS cLCAg38OWI4Y4GECgQcSOEwYcADnh6/FNjAwoGFYAQ0atI4AAFeEFwsLFLiJUQEfGH0kNGAD x8+oNQdIRQg+7NCaOhIgD8sVgYADNsPVGI5YWjRqzQTdHDDIYHRDLokaUhCglkFEJi0NKJhl 0RP2TsvXUg88KiLBVWsZrF6DmMKlNYMqglqTik1guN8OBgAgkGCpB+L9ugK4iSCBvwEfECw1 kILrBpa1jVCQIQBRvbP+rlEcQVAoSevWyv6uhpwE12uEkQAAZucpVw1xIsjkgf8B863mQVYt eQATCZYJZJ5WBfij2wfpHcEeHGG8Z+BMszVWDXkfKLhceJhBSAJ+1ThH32AfRFZNayNAtUFi wFSTSwEHJIYAAQU84IADwyjIEALU9MchG+vFgIF7W2GDI2T7HfjBgNcgKQKMHmwjgnCSpeCb ULRkdxhF1CDY40RjgmUAA/v1J5FAKW2gGSZscBFDMraNgJs1AYpAAGYP5jJoNQ4Y4Gh8jpFg HH9mgbmWo1l6oA4C3Ygp6UwEIFBfNRtkMIBlKMLnAXgAXLWhXXH85EIFqMhGGZgDEKArABGA ed0HI4bk5qgnprCYSt88B6dqS0FEEAMPJDCdCJYViur/B1BlwGMJqDTwnhqxJgUpo0ceOQ4D 0yEakpMm/jqCRMgWm2I1j824Y6vLvuuPjHnqOJkIgP6xzwp5sCFNsCFp88Gxh11lrjfDcNrc CEx64/CD3iAHlQcMUEQXvcA+qBkBB4Q2X1CusjBlJdKMYAKI6g28MbKN5hJsBAXknHOwutn4 oFYqkpqAzjnPbE0u1PxmwAQGXLWBbvhuIIEGEnRjlAHO4SvhbCNAkwoGzEBwgV9U0lfu2WiX OkDEGaCdKgl0nk2YkWdPOCDabvaGdkAftL1LlgwCM+7Tq11V71IO7LkM2XE0YAHMYMhqqK6U V165CpaHukLmiXFO8XSVzzakX+UH6TrmAajPNxfqByTQec41AeBPvSwIALkmAnuiexCsca3C BajgfsROuxcPA8kHQJX4DAIwjnsAvhsvfXHWKEwDAljg7sj03L9wwAQTxOWD2AE0YP75eCkw cPfs+xACADs= --------------42116FB0C46FABA6A6982AF7-- --------------1F41AA982CD26EC47BC0B407--

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Clone, template, pools : how does it uses disk space ?
by Alexis HAUSER 31 May '16

31 May '16

Hi, I would like to know what happens to storage when using the different method of cloning or generating VMs using templates / pools. I'd like to know also in what case VM and virtual disks are totally independent and in what case they are not. Sadly the RHEV documentation doesn't really provide these informations and I don't find any explicit informations about it. For example, when making a VM from template, using pre-allocated disk option, for a 50GB Virtual disk, it only uses 3GB on the physical disk. Another example, when making a pool of 10 VMs, based on a VM with a 50 GB virtual disk, only 2GB more space is used on the physical disk. What is exactly done when this happens ? Here are the case I would like to have informations about (physical storage, and independence of VMs) : - using simple "clone function" - making VM from template with "clone" mode - making VM from template with "thin" mode - making VM in pools Is there modes calculating only the difference from the original VM, and other modes copying totally the informations from the virtual disk from the original VM ?

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