This is a multi-part message in MIME format. --------------010000090502070605080205 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Tim, Thanks for your information. I am not sure why we need power management to be configured for the hosts running HA virtual machines. If one host is down because of network interrupt or power failure, the engine should know how many HA VMs are down and find out the VM images on the storage domain to start the VM instances on another host in the cluster. Why do we need power manager to be configured? We only need a method to check the VM or host status and a method to restart the VM instances with existing VM images on another host. Is it required to force powering down the failing host forever to make sure the failing host will not come back to live again? * Power management must be configured for the hosts running the highly available virtual machines. * The host running the highly available virtual machine must be part of a cluster which has other available hosts. * The destination host must be running. * The source and destination host must have access to the data domain on which the virtual machine resides. * The source and destination host must have access to the same virtual networks and VLANs. * There must be enough CPUs on the destination host that are not in use to support the virtual machine's requirements. * There must be enough RAM on the destination host that is not in use to support the virtual machine's requirements. Tim Hildred:
You might also find this helpful: https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Virtualiza...
The topics before and after it explain a bit more about high availability.
Tim Hildred, RHCE Content Author II - Engineering Content Services, Red Hat, Inc. Brisbane, Australia Email: thildred@redhat.com Internal: 8588287 Mobile: +61 4 666 25242 IRC: thildred
----- Original Message -----
From: "Dafna Ron" <dron@redhat.com> To: suporte@logicworks.pt Cc: Users@ovirt.org Sent: Monday, March 18, 2013 4:46:51 AM Subject: Re: [Users] High Availability
I think that there is some confusion here so I will explain what are the configurations for fail-over.
power management will reboot your host if a connectivity issue is detected so all your vm's will be killed. resilience policy will allow you to choose vm migration policy during a host failure and its configured in the cluster level (clusters -> select cluster -> general sub tab -> edit policy) High Availability is configured only for servers type vm's and what it does is re-run the vm in case the pid of the vm is killed (so most commonly, if you have power management configured, and the host is rebooted, the vm will start automatically on a different host).
so it really depends what you want. if you want vm migration than look into cluster policy, if you want a specific vm to always be up and you don't care about the other vm's than configure power management and a HA vm. it really depends on what you need.
On 03/17/2013 07:15 PM, suporte@logicworks.pt wrote:
Is it Mandatory to have power manamement enabled? if yes what equipment do you recommend to use with it?
Regards Jose
----- Mensagem original ----- De: "René Koch" <r.koch@ovido.at> Para: suporte@logicworks.pt, Users@ovirt.org Enviadas: Domingo, 17 Março, 2013 16:47:41 Assunto: RE: [Users] High Availability
Hi,
You have to configure power management to make high availability working and mark the vms high availability checkbox...
Regards, René
-----Original message-----
From:suporte@logicworks.pt <suporte@logicworks.pt> Sent: Sunday 17th March 2013 17:28 To: Users@ovirt.org Subject: [Users] High Availability
What should I need to configure to put HA working? I mean, when a host broke all the VM automatically move to another host. Do I need to have Power management enabled?
Thanks _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
-- Dafna Ron _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
-- --- 舒明 Shu Ming Open Virtualization Engineerning; CSTL, IBM Corp. Tel: 86-10-82451626 Tieline: 9051626 E-mail: shuming@cn.ibm.com or shuming@linux.vnet.ibm.com Address: 3/F Ring Building, ZhongGuanCun Software Park, Haidian District, Beijing 100193, PRC --------------010000090502070605080205 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit <html> <head> <meta content="text/html; charset=UTF-8" http-equiv="Content-Type"> </head> <body text="#000000" bgcolor="#FFFFFF"> <div class="moz-cite-prefix">Tim,<br> <br> Thanks for your information. I am not sure why we need power management to be configured for the hosts running HA virtual machines. If one host is down because of network interrupt or power failure, the engine should know how many HA VMs are down and find out the VM images on the storage domain to start the VM instances on another host in the cluster. Why do we need power manager to be configured? We only need a method to check the VM or host status and a method to restart the VM instances with existing VM images on another host. Is it required to force powering down the failing host forever to make sure the failing host will not come back to live again?<br> <br> <br> <ul> <li class="listitem"> <div class="para">Power management must be configured for the hosts running the highly available virtual machines. </div> </li> <li class="listitem"> <div class="para"> The host running the highly available virtual machine must be part of a cluster which has other available hosts. </div> </li> <li class="listitem"> <div class="para"> The destination host must be running. </div> </li> <li class="listitem"> <div class="para"> The source and destination host must have access to the data domain on which the virtual machine resides. </div> </li> <li class="listitem"> <div class="para"> The source and destination host must have access to the same virtual networks and VLANs. </div> </li> <li class="listitem"> <div class="para"> There must be enough CPUs on the destination host that are not in use to support the virtual machine's requirements. </div> </li> <li class="listitem"> <div class="para"> There must be enough RAM on the destination host that is not in use to support the virtual machine's requirements. </div> </li> </ul> <br> <br> Tim Hildred:<br> </div> <blockquote cite="mid:646344375.46855977.1363573783397.JavaMail.root@redhat.com" type="cite"> <pre wrap="">You might also find this helpful: <a class="moz-txt-link-freetext" href="https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Virtualization/3.1/html/Administration_Guide/High_availability_considerations.html">https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Virtualization/3.1/html/Administration_Guide/High_availability_considerations.html</a> The topics before and after it explain a bit more about high availability. Tim Hildred, RHCE Content Author II - Engineering Content Services, Red Hat, Inc. Brisbane, Australia Email: <a class="moz-txt-link-abbreviated" href="mailto:thildred@redhat.com">thildred@redhat.com</a> Internal: 8588287 Mobile: +61 4 666 25242 IRC: thildred ----- Original Message ----- </pre> <blockquote type="cite"> <pre wrap="">From: "Dafna Ron" <a class="moz-txt-link-rfc2396E" href="mailto:dron@redhat.com"><dron@redhat.com></a> To: <a class="moz-txt-link-abbreviated" href="mailto:suporte@logicworks.pt">suporte@logicworks.pt</a> Cc: <a class="moz-txt-link-abbreviated" href="mailto:Users@ovirt.org">Users@ovirt.org</a> Sent: Monday, March 18, 2013 4:46:51 AM Subject: Re: [Users] High Availability I think that there is some confusion here so I will explain what are the configurations for fail-over. power management will reboot your host if a connectivity issue is detected so all your vm's will be killed. resilience policy will allow you to choose vm migration policy during a host failure and its configured in the cluster level (clusters -> select cluster -> general sub tab -> edit policy) High Availability is configured only for servers type vm's and what it does is re-run the vm in case the pid of the vm is killed (so most commonly, if you have power management configured, and the host is rebooted, the vm will start automatically on a different host). so it really depends what you want. if you want vm migration than look into cluster policy, if you want a specific vm to always be up and you don't care about the other vm's than configure power management and a HA vm. it really depends on what you need. On 03/17/2013 07:15 PM, <a class="moz-txt-link-abbreviated" href="mailto:suporte@logicworks.pt">suporte@logicworks.pt</a> wrote: </pre> <blockquote type="cite"> <pre wrap="">Is it Mandatory to have power manamement enabled? if yes what equipment do you recommend to use with it? Regards Jose ----- Mensagem original ----- De: "René Koch" <a class="moz-txt-link-rfc2396E" href="mailto:r.koch@ovido.at"><r.koch@ovido.at></a> Para: <a class="moz-txt-link-abbreviated" href="mailto:suporte@logicworks.pt">suporte@logicworks.pt</a>, <a class="moz-txt-link-abbreviated" href="mailto:Users@ovirt.org">Users@ovirt.org</a> Enviadas: Domingo, 17 Março, 2013 16:47:41 Assunto: RE: [Users] High Availability Hi, You have to configure power management to make high availability working and mark the vms high availability checkbox... Regards, René -----Original message----- </pre> <blockquote type="cite"> <pre wrap=""><a class="moz-txt-link-abbreviated" href="mailto:From:suporte@logicworks.pt">From:suporte@logicworks.pt</a> <a class="moz-txt-link-rfc2396E" href="mailto:suporte@logicworks.pt"><suporte@logicworks.pt></a> Sent: Sunday 17th March 2013 17:28 To: <a class="moz-txt-link-abbreviated" href="mailto:Users@ovirt.org">Users@ovirt.org</a> Subject: [Users] High Availability What should I need to configure to put HA working? I mean, when a host broke all the VM automatically move to another host. Do I need to have Power management enabled? Thanks _______________________________________________ Users mailing list <a class="moz-txt-link-abbreviated" href="mailto:Users@ovirt.org">Users@ovirt.org</a> <a class="moz-txt-link-freetext" href="http://lists.ovirt.org/mailman/listinfo/users">http://lists.ovirt.org/mailman/listinfo/users</a> </pre> </blockquote> <pre wrap="">_______________________________________________ Users mailing list <a class="moz-txt-link-abbreviated" href="mailto:Users@ovirt.org">Users@ovirt.org</a> <a class="moz-txt-link-freetext" href="http://lists.ovirt.org/mailman/listinfo/users">http://lists.ovirt.org/mailman/listinfo/users</a> </pre> </blockquote> <pre wrap=""> -- Dafna Ron _______________________________________________ Users mailing list <a class="moz-txt-link-abbreviated" href="mailto:Users@ovirt.org">Users@ovirt.org</a> <a class="moz-txt-link-freetext" href="http://lists.ovirt.org/mailman/listinfo/users">http://lists.ovirt.org/mailman/listinfo/users</a> </pre> </blockquote> <pre wrap="">_______________________________________________ Users mailing list <a class="moz-txt-link-abbreviated" href="mailto:Users@ovirt.org">Users@ovirt.org</a> <a class="moz-txt-link-freetext" href="http://lists.ovirt.org/mailman/listinfo/users">http://lists.ovirt.org/mailman/listinfo/users</a> </pre> </blockquote> <br> <br> <pre class="moz-signature" cols="72">-- --- 舒明 Shu Ming Open Virtualization Engineerning; CSTL, IBM Corp. Tel: 86-10-82451626 Tieline: 9051626 E-mail: <a class="moz-txt-link-abbreviated" href="mailto:shuming@cn.ibm.com">shuming@cn.ibm.com</a> or <a class="moz-txt-link-abbreviated" href="mailto:shuming@linux.vnet.ibm.com">shuming@linux.vnet.ibm.com</a> Address: 3/F Ring Building, ZhongGuanCun Software Park, Haidian District, Beijing 100193, PRC</pre> </body> </html> --------------010000090502070605080205--