<div dir="ltr">Hello Vahric and list! Thank you for the answer!<br><br>I've analyzed documentation you indicated. Although one of that be related with a Huawei product, the answer for the problem was there, exactly what reported:<br><br>If the version of OpenStack is Havana and IceHouse, add libvirt_iscsi_use_multipath = True in [default] of /etc/nova/nova.conf. If the version of OpenStack is Juno, Kilo, and Liberty, add iscsi_use_multipath = True in [libvirt] of /etc/nova/nova.conf.<br><br>So, to use IBM Storwize with iSCSI multipath we need:<br><br>- configure Storwize driver to manage the storage;<br>- configure multipath on compute nodes;<br>- add libvirt_iscsi_use_multipath = True or iscsi_use_multipath = True depending of the running version.<br><br>When attaching a volume to one instance, Storwize driver will connect on storage via management interface (normally via ssh), get parameters about available iSCSI IPs and make the compute nodes run iscsiadm in a manner that connects to all of theses IPs. At this moment, running multipath -ll on the compute node that executes the virtual machine on which the volume was attached, we could see the available paths!<br><br>I've created a solicitation to include these information on Storwize driver documentation. <br><br><a href="https://bugs.launchpad.net/openstack-manuals/+bug/1564442">https://bugs.launchpad.net/openstack-manuals/+bug/1564442</a><br><br>Thank you!!<br>:)<br></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature"><div dir="ltr">- JLC</div></div></div>
<br><div class="gmail_quote">On Wed, Mar 30, 2016 at 5:17 PM, Vahric Muhtaryan <span dir="ltr"><<a href="mailto:vahric@doruk.net.tr" target="_blank">vahric@doruk.net.tr</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-family:Calibri,sans-serif"><div>Hello , </div><div>To be an example I find out 3PAR documentation which HPE newly implement multipath with liberty and config is on pdf <a href="http://www8.hp.com/h20195/v2/GetPDF.aspx%2F4AA5-1930ENW.pdf" target="_blank">http://www8.hp.com/h20195/v2/GetPDF.aspx%2F4AA5-1930ENW.pdf</a> </div><div>I am also IBM customer but using FC but for iscsi I checked liberty configuration reference and looks like from Grizzly its supported </div><div>But on of other ibm documentation is saying its controlled by Nova </div><div><span style="white-space:pre-wrap"> </span><a href="https://www.ibm.com/support/knowledgecenter/#!/SST55W_4.1.0/liaca/liaca_configuring_storwize_driver.html" target="_blank">https://www.ibm.com/support/knowledgecenter/#!/SST55W_4.1.0/liaca/liaca_configuring_storwize_driver.html</a></div><div>Then I find out this <a href="http://docs.openstack.org/liberty/config-reference/content/config-iscsi-multipath.html" target="_blank">http://docs.openstack.org/liberty/config-reference/content/config-iscsi-multipath.html</a> , looks like after Juno it should be configured by openstack admin in nova.conf under libvirt section manually . </div><div><br></div><div>Hope you can success </div><div>Pls inform me </div><div>Regards</div><div>VM</div><div><br></div><span><div style="font-family:Calibri;font-size:11pt;text-align:left;color:black;BORDER-BOTTOM:medium none;BORDER-LEFT:medium none;PADDING-BOTTOM:0in;PADDING-LEFT:0in;PADDING-RIGHT:0in;BORDER-TOP:#b5c4df 1pt solid;BORDER-RIGHT:medium none;PADDING-TOP:3pt"><span style="font-weight:bold">From: </span> Jorge Luiz Correa <<a href="mailto:correajl@gmail.com" target="_blank">correajl@gmail.com</a>><br><span style="font-weight:bold">Date: </span> Wednesday 30 March 2016 at 21:18<br><span style="font-weight:bold">To: </span> <<a href="mailto:openstack@lists.openstack.org" target="_blank">openstack@lists.openstack.org</a>><br><span style="font-weight:bold">Subject: </span> [Openstack] Help configuring multipath with IBM storwize v3700.<br></div><div><div class="h5"><div><br></div><div dir="ltr">Hi! I would like to get some help configuring my compute nodes to use multipath when establishing iscsi connections with a IBM Storwize v3700 storage. <br><br>I have 1 controller, 1 network node and 2 compute nodes. The IBM Storwize driver is configured on controller and volumes can be created and attached to instances running on compute nodes. <br><br>However, my storage has 2 nodes (canisters or controllers) and each one has two 10G interfaces for iscsi use. So, I have four IPs configured as iscsi at storage. But, when I attach a volume to some virtual machine, the compute node uses the first IP of the 'primary' controller (IBM calls this by 'config node'). <br><br>I've read a lot of documentation but I couldn't find certainly what I need to configure neither where I need to put these configuration. <br><br>What I've already read is that this model of storage doesn't answer to iscsi calls with a list of available iscsi IPs, as do some others equipments. So, I need some way to tell nova that I have more than one IP address available, so iscsi commands can connect using not just one IP. <br><br>Making compute nodes connect to 2 iscsi IPs then I can use multipath. I've already configured multipath on compute nodes but it isn't used. <br><br>So:<br><br>- how to configure nova to use multipath?<br>- how to configure nova to make more than one iscsi connection?<br><br>I appreciate ANY help, documentation, configuration examples etc. <br><br>Thanks!<br>:)<br><br clear="all"><div><div><div dir="ltr">- JLC</div></div></div></div></div></div>
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