<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman",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-reply;
font-family:"Calibri",sans-serif;
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>We’ve generally done staged upgrades (process documented in <a href="http://openstack-in-production.blogspot.com">http://openstack-in-production.blogspot.com</a>). For a smoother migration, we have split the changes to the service catalog to the latest API versions (e.g. Keystone V2 to V3) from the code upgrade. This allows you to have an easier rollback plan.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>However, we’ve always upgraded Nova last so I can’t confirm a newer Keystone than Nova but we’ve certainly had the latest Ceilometer before we upgraded Keystone.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>Tim<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Matt Fischer [mailto:matt@mattfischer.com] <br><b>Sent:</b> 06 January 2016 16:27<br><b>To:</b> Kevin Bringard (kevinbri) <kevinbri@cisco.com><br><b>Cc:</b> openstack-operators@lists.openstack.org<br><b>Subject:</b> Re: [Openstack-operators] kilo keystone with liberty nova<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>We've done the opposite, newer Keystone with older code. No issues that we've seen.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On Wed, Jan 6, 2016 at 8:15 AM, Kevin Bringard (kevinbri) <<a href="mailto:kevinbri@cisco.com" target="_blank">kevinbri@cisco.com</a>> wrote:<o:p></o:p></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><p class=MsoNormal>We've even done later versions of keystone with older versions of other stuff (Specifically Kilo Keystone with Juno Glance/Heat and Icehouse everything else)...<br><br>The thing I'd watch out for going the other direction is if the newer version of, let's say, nova, requires API calls which aren't present in your older version of Keystone. I can't think of any specific calls off the top of my head, but that'd be the only major read flag which comes to mind.<br><br><br><br>On 1/5/16, 10:50 PM, "Abel Lopez" <<a href="mailto:alopgeek@gmail.com">alopgeek@gmail.com</a>> wrote:<br><br>><br>><br>><br>>We've done things like Icehouse keystone and Juno glance/heat/ceilometer.<br>><br>><br>>Seems like having older keystone is somewhat safe.<br>><br>>On Tuesday, January 5, 2016, Marcus Furlong <<a href="mailto:furlongm@gmail.com">furlongm@gmail.com</a>> wrote:<br>><br>>Hi,<br>><br>>Just wanted to check if it's possible to have a mixed version<br>>environment with kilo keystone and e.g. liberty nova.<br>><br>>Has anyone done this? Any gotchas?<br>><br>>Regards,<br>>Marcus.<br>>--<br>>Marcus Furlong<br>><br>>_______________________________________________<br>>OpenStack-operators mailing list<br>><a href="mailto:OpenStack-operators@lists.openstack.org">OpenStack-operators@lists.openstack.org</a> <javascript:;><br>><a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators" target="_blank">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators</a><o:p></o:p></p><div><div><p class=MsoNormal>><br>><br>><br>_______________________________________________<br>OpenStack-operators mailing list<br><a href="mailto:OpenStack-operators@lists.openstack.org">OpenStack-operators@lists.openstack.org</a><br><a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators" target="_blank">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators</a><o:p></o:p></p></div></div></blockquote></div><p class=MsoNormal><o:p> </o:p></p></div></div></div></body></html>