--_000_B2CAFC4D5E2D574A883EF61ACD5ADE3301000617SERV070corpeldo_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi everyone, While I was figuring out how to implement the support for IBM POWER in the = oVirt engine, I stumbled into an use case that can cause some confusion. During the creation of a cluster, you can choose an empty processor name if= you do not select the option "Enable Virt Service". As a result, it is pos= sible to create a virtual machine inside a cluster without any attached hos= ts. So, if you create a VM this way, it is impossible to decide in which ar= chitecture it will run (if it is either x86-64 or POWER). Without knowing t= his, the engine cannot show the proper list of device models (for networks,= disks, displays, ...) in the frontend. It raises some questions: - Why oVirt allows the creation of clusters without a processor name? - What exactly is the "Virt Service"? Why are the processor related checks= only executed if this service is enabled? - How can this use case be solved? Should the engine always enforce a prope= r CPU name in all clusters? - If the engine enforces every cluster to have a CPU name, what should be d= one in the default Cluster? Thanks, Vitor --_000_B2CAFC4D5E2D574A883EF61ACD5ADE3301000617SERV070corpeldo_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable <html xmlns:v=3D"urn:schemas-microsoft-com:vml" xmlns:o=3D"urn:schemas-micr= osoft-com:office:office" xmlns:w=3D"urn:schemas-microsoft-com:office:word" = xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" xmlns=3D"http:= //www.w3.org/TR/REC-html40"> <head> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"=
<meta name=3D"Generator" content=3D"Microsoft Word 14 (filtered medium)"> <style><!-- /* Font Definitions */ @font-face {font-family:SimSun; panose-1:2 1 6 0 3 1 1 1 1 1;} @font-face {font-family:SimSun; panose-1:2 1 6 0 3 1 1 1 1 1;} @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} @font-face {font-family:"\@SimSun"; panose-1:2 1 6 0 3 1 1 1 1 1;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm; margin-bottom:.0001pt; font-size:11.0pt; font-family:"Calibri","sans-serif";} a:link, span.MsoHyperlink {mso-style-priority:99; color:blue; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {mso-style-priority:99; color:purple; text-decoration:underline;} span.EmailStyle17 {mso-style-type:personal-compose; font-family:"Calibri","sans-serif"; color:windowtext;} .MsoChpDefault {mso-style-type:export-only; font-family:"Calibri","sans-serif";} @page WordSection1 {size:612.0pt 792.0pt; margin:70.85pt 3.0cm 70.85pt 3.0cm;} div.WordSection1 {page:WordSection1;} --></style><!--[if gte mso 9]><xml> <o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" /> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext=3D"edit"> <o:idmap v:ext=3D"edit" data=3D"1" /> </o:shapelayout></xml><![endif]--> </head> <body lang=3D"PT-BR" link=3D"blue" vlink=3D"purple"> <div class=3D"WordSection1"> <p class=3D"MsoNormal"><span lang=3D"EN-US">Hi everyone,<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">While I was figuring out how to= implement the support for IBM POWER in the oVirt engine, I stumbled into a= n use case that can cause some confusion.<o:p></o:p></span></p> <p class=3D"MsoNormal"><span lang=3D"EN-US">During the creation of a cluste= r, you can choose an empty processor name if you do not select the option &= quot;Enable Virt Service". As a result, it is possible to create a vir= tual machine inside a cluster without any attached hosts. So, if you create a VM this way, it is impossible to decide in whic= h architecture it will run (if it is either x86-64 or POWER). Without knowi= ng this, the engine cannot show the proper list of device models (for netwo= rks, disks, displays, ...) in the frontend.<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">It raises some questions:<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">- Why oVirt allows the creation= of clusters without a processor name?<o:p></o:p></span></p> <p class=3D"MsoNormal"><span lang=3D"EN-US">- What exactly is the "Vir= t Service"? Why are the processor related checks only executed i= f this service is enabled?<o:p></o:p></span></p> <p class=3D"MsoNormal"><span lang=3D"EN-US">- How can this use case be solv= ed? Should the engine always enforce a proper CPU name in all clusters?<o:p=
</o:p></span></p> <p class=3D"MsoNormal"><span lang=3D"EN-US">- If the engine enforces every = cluster to have a CPU name, what should be done in the default Cluster?<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">Thanks,<o:p></o:p></span></p> <p class=3D"MsoNormal"><span lang=3D"EN-US">Vitor<o:p></o:p></span></p> </div> </body> </html>
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