---------- Forwarded Message ---------- Subject: Re: [openstack-dev] [Nova] Providing instance's guest OS with data (ssh keys, root password, hostname) Date: Friday 19 December 2014, 14:17:34 From: Daniel P. Berrange <berra...@redhat.com> To: OpenStack Development Mailing List (not for usage questions) <openstack- d...@lists.openstack.org>
Dmitry GuryanovOn Fri, Dec 19, 2014 at 05:11:57PM +0300, wrote: > Hello, > > If I understood correctly, there are 3 ways to provide guest OS with some data > (SSH keys, for example): > > 1. mount guest root fs on host (with libguestfs) and copy data there. > 2. config drive and cloud-init > 3. nova metadata service and cloud-init > > > All 3 methods do almost the same thing and can be enabled or disabled in nova > config file. So which one is preferred? How do people usually configure their > openstack clusters? > > I'm asking, because we are going to extend nova/libvirt driver to support our > virtualization solution (parallels driver in libvirt) and it seems it will not > work as is and requires some development. Which method is first-priority and > used by most people? I'd probably prioritize in this order: 1. config drive and cloud-init 2. nova metadata service and cloud-init 3. mount guest root fs on host (with libguestfs) and copy data there. but there's not much to choose between 1 & 2. NB, option 3 isn't actually hardcoded to use libguestfs - it falls back to using loop devices / local mounts, albeit less secure, so not really recommended. At some point option 3 may be removed from Nova entirely since the first two options are preferred & more reliable in general. Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :| _______________________________________________ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev ----------------------------------------- -- Dmitry Guryanov _______________________________________________ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
