<html 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:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0cm;
margin-right:0cm;
margin-bottom:0cm;
margin-left:36.0pt;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:1997370145;
mso-list-type:hybrid;
mso-list-template-ids:-56691380 -1 134807577 134807579 134807567 134807577 134807579 134807567 134807577 134807579;}
@list l0:level1
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level2
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level3
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l0:level4
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level5
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level6
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l0:level7
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level8
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level9
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
ol
{margin-bottom:0cm;}
ul
{margin-bottom:0cm;}
--></style></head><body lang=EN-AU link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Hi all </p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>My questions are;</p><p class=MsoNormal><o:p> </o:p></p><ol style='margin-top:0cm' start=1 type=1><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>How are people using iSCSI Cinder storage with Openstack to-date? For example a Nimble Storage array backend. I mean to say, are people using backend integration drivers for other hardware (like netapp)? Or are they using backend iscsi for example?</li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'>How are people managing DR with Openstack in terms of backend storage replication to another array in another location and continuing to use Openstack? </li></ol><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The environment which I am currently using;</p><p class=MsoNormal>1 x Nimble Storage array (iSCSI) with nimble.py Cinder driver </p><p class=MsoNormal>1 x virtualised Controller node</p><p class=MsoNormal>2 x physical compute nodes</p><p class=MsoNormal>This is Openstack Pike. </p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>In addition, I have a 2<sup>nd</sup> Nimble Storage array in another location.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>To explain the questions I’d like to put forward my thoughts for question 2 first: </p><p class=MsoNormal>For point 2 above, I have been searching for a way to utilise replicated volumes on the 2<sup>nd</sup> array from Openstack with existing instances. For example, if site 1 goes down how would I bring up openstack in the 2<sup>nd</sup> location and boot up the instances where their volumes are stored on the 2<sup>nd</sup> array. I found a proposal for something called “cheesecake” ref: <a href="https://specs.openstack.org/openstack/cinder-specs/specs/rocky/cheesecake-promote-backend.html">https://specs.openstack.org/openstack/cinder-specs/specs/rocky/cheesecake-promote-backend.html</a> <br>But I could not find if it had been approved or implemented. So I return to square 1. I have some thoughts about failing over the controller VM and compute node but I don’t think there’s any need to go into here because of the above blocker and for brevity anyway.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The nimble.py driver which I am using came with Openstack Pike and it appears Nimble / HPE are not maintaining it any longer. I saw a commit to remove nimble.py in Openstack Train release. The driver uses the REST API to perform actions on the array. Such as creating a volume, downloading the image, mounting the volume to the instance, snapshots, clones etc. This is great for me because to date I have around 10TB of openstack storage data allocated and the Nimble array shows the amount of data being consumed is <900GB. This is due to the compression and zero-byte snapshots and clones. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>So coming back to question 2 – is it possible? Can you drop me some keywords that I can search for such as an Openstack component like Cheesecake? I think basically what I am looking for is a supported way of telling Openstack that the instance volumes are now located at the new / second array. This means a new cinder backend. Example, new iqn, IP address, volume serial number. I think I could probably hack the cinder db but I really want to avoid that. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>So failing the above, it brings me to the question 1 I asked before. How are people using Cinder volumes? May be I am going about this the wrong way and need to take a few steps backwards to go forwards? I need storage to be able to deploy instances onto. Snapshots and clones are desired. At the moment these operations take less time than the horizon dashboard takes to load because of the waiting API responses. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>When searching for information about the above as an end-user / consumer I get a bit concerned. Is it right that Openstack usage is dropping? There’s no web forum to post questions. The chatroom on freenode is filled with ~300 ghosts. Ask Openstack questions go without response. Earlier this week (before I found this mail list) I had to use facebook to report that the Openstack.org website had been hacked. Basically it seems that if you’re a developer that can write code then you’re in but that’s it. I have never been a coder and so I am somewhat stuck. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks in advance</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986">Mail</a> for Windows 10</p><p class=MsoNormal><o:p> </o:p></p></div></body></html>