Daniel, Thanks for you response. But I am still confusing about use a iscsi device, if I want to use it as shared storage, first I need to attach to a node as a block storage, then I mount it to other compute nodes using NFS. The problem is that this will make a big lost on performance. Currently nova already support to create a new VM on ceph RBD, but why we can not create it on a block storage?
Thanks. 在 2013年10月28日星期一，Speichert,Daniel 写道： > Ray,**** > > It seems that OpenStack purposefully omits the method of provisioning > shared storage.**** > > It’s totally up to you �C all you need to do is to mount > /var/lib/nova/instances/ on each compute node on the system level.**** > > ** ** > > Make sure your user IDs inside /var/lib/nova/instances/ are correct: nova, > libvirt-em and kvm need to have matching IDs across all machines if you use > e.g. NFSv3.**** > > ** ** > > Regards,**** > > Daniel**** > > ** ** > > *From:* Ray Sun [mailto:xiaoq...@gmail.com <javascript:_e({}, 'cvml', > 'xiaoq...@gmail.com');>] > *Sent:* Monday, October 28, 2013 4:27 AM > *To:* OpenStack Maillist > *Subject:* [Openstack] [Nova]How to setup shared storage for live > migration based on IPSAN device?**** > > ** ** > > Hi Stackers,**** > > I found there is a document to describe how to setup live migration using > NFS by Mirantis.**** > > > http://www.mirantis.com/blog/tutorial-openstack-live-migration-with-kvm-hypervisor-and-nfs-shared-storage > **** > > In this articles, there is a paragraph here:**** > > *In a typical Openstack deployment, every compute node manages its > instances locally in a dedicated directory (for example, > /var/lib/nova/instances/) but for live migration, this folder has to be in > a centralized location and shared across all the compute nodes. Hence, a > shared file system or block storage is an important requirement for > enabling live migration. For shared storage, a distributed file system such > as GlusterFS, NFS needs to be properly configured and running before live > migration can be performed. SAN storage protocols such as Fibre Channel > (FC) and iSCSI can also be used for shared storage.***** > > ** ** > > Please pay attention the sentence in blue, currently, I have a IPSAN > device, and I want use it as the shared storage for all my compute nodes. > My questions is how to setup it in nova, I didn't find any document to > introduce this, please help. Thanks a lot.**** > > ** ** > > Best Regards > -- Ray**** > -- Best Regards -- Ray
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