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Re: [libvirt] Different approach to locking



On Thu, Nov 11, 2010 at 11:35:55AM +0000, Daniel P. Berrange wrote:

> If you wanted to avoid directly using the libvirt lock manager plugins,
> and use a public libvirt API, then the other option is for libguestfs to
> create a custom XML with all the requested disks, and boot a transient
> libvirt guest with the libguestfs kernel/initrd/appliance and attach to
> the guestfsd inside that VM. Then the locking would all 'just work' since
> libguestfs would be a normal libvirt client application.

Yet another option would be to directly implement the locking schemes
in libguestfs itself. eg directly talk to sync-manager via its CLI
tool, or directly talk to libvirt's  virt-lockd (or follow the same
fcntl() locking rules that virt-lockd will use). Of course this is
probably more code work than all the other options, but is maximally
flexible in how you integrate.

Regards,
Daniel
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