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<div class="">Multi-attach will not allow you to have a block device with a local file-system to be concurrently</div>
<div class="">accessed from multiple nodes. It is intended for HA scenarios where a second server can take</div>
<div class="">over a block device from another server. So, if you unmount on your first server, you can mount</div>
<div class="">on the second and you will see your file.</div>
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<div class="">Arne</div>
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<div class="">On 06 Mar 2018, at 09:53, 谭 明宵 <<a href="mailto:tanmingxiao@outlook.com" class="">tanmingxiao@outlook.com</a>> wrote:</div>
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I installed the openstack queens use <span style="margin: 0px; padding: 0px; line-height: 22.4px;" class="">devstack. I want to test the "</span>Cinder Multi-Attach<span style="margin: 0px; padding: 0px; line-height: 22.4px;" class="">" </span>function
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<div style="margin: 0px; padding: 0px;" class="">1. create a multiattach volume</div>
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<div style="margin: 0px; padding: 0px;" class="">```</div>
<div style="margin: 0px; padding: 0px;" class=""># cinder type-create multiattach</div>
<div style="margin: 0px; padding: 0px;" class=""># cinder type-key multiattach set multiattach="<is> True"</div>
<div style="margin: 0px; padding: 0px;" class=""># cinder create 10 --name multiattach-volume --volume-type <volume_type_uuid></div>
<div style="margin: 0px; padding: 0px;" class="">```</div>
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<div style="margin: 0px; padding: 0px;" class="">2. attache the volume to two instances</div>
<div style="margin: 0px; padding: 0px;" class="">```</div>
<div style="margin: 0px; padding: 0px;" class=""># nova volume-attach test01 <volume_uuid></div>
<div style="margin: 0px; padding: 0px;" class=""># nova volume-attach test02 <volume_uuid></div>
<div style="margin: 0px; padding: 0px;" class="">```</div>
<div style="margin: 0px; padding: 0px;" class=""><span id="cid:DCD455A4-5EDA-44C0-9DA9-877CCF9C679E@mailmaster"><7B194ED4-5D18-4FFA-9FF3-E54DB425E7E4.png></span></div>
<div style="margin: 0px; padding: 0px;" class="">3. mount the volume , create some file，but the file don't sync between the two instance，It seems that they are two independent volumes</div>
<div style="margin: 0px; padding: 0px;" class=""><span id="cid:99ABEDC0-DE62-497F-931B-8F5276ADD2E1@mailmaster"><4DFCCC80-5132-4383-B986-726664E45EAF.png></span></div>
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<div style="margin: 0px; padding: 0px;" class="">then test02 create a file，but i cannot find it in test01,The reverse is the same.</div>
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<div style="margin: 0px; padding: 0px;" class=""><span id="cid:C2C7FD23-2B2B-4060-9155-C9AC30953580@mailmaster"><FC3B5C89-087F-4BE5-9B02-C584E7E80BEA.png></span></div>
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<div style="margin: 0px; padding: 0px;" class="">I think i have something wrong，the test like the "share storage"</div>
<div style="margin: 0px; padding: 0px;" class="">What should the correct effect be like? thanks</div>
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<div class="">--<br class="">
Arne Wiebalck<br class="">
CERN IT </div>
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