Multi-attach will not allow you to have a block device with a local file-system to be concurrently accessed from multiple nodes. It is intended for HA scenarios where a second server can take over a block device from another server. So, if you unmount on your first server, you can mount on the second and you will see your file.
Arne On 06 Mar 2018, at 09:53, 谭 明宵 <tanmingx...@outlook.com<mailto:tanmingx...@outlook.com>> wrote: I installed the openstack queens use devstack. I want to test the "Cinder Multi-Attach" function 1. create a multiattach volume ``` # cinder type-create multiattach # cinder type-key multiattach set multiattach="<is> True" # cinder create 10 --name multiattach-volume --volume-type <volume_type_uuid> ``` 2. attache the volume to two instances ``` # nova volume-attach test01 <volume_uuid> # nova volume-attach test02 <volume_uuid> ``` <7B194ED4-5D18-4FFA-9FF3-E54DB425E7E4.png> 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 <4DFCCC80-5132-4383-B986-726664E45EAF.png> then test02 create a file，but i cannot find it in test01,The reverse is the same. <FC3B5C89-087F-4BE5-9B02-C584E7E80BEA.png> I think i have something wrong，the test like the "share storage" What should the correct effect be like? thanks _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org<mailto:openstack@lists.openstack.org> Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack -- Arne Wiebalck CERN IT
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