Hello Lei, Both ways can be used, depends if you want your database to be accessible outside the datacenter network as highly available then FIP can be used , if it would internal services that would be using database , then you can implement using Fixed ips , but for that , you need to mark fixed_ip as reserved in the nova database fixed_ip table the ip you would be using as a virtual ip, otherwise ip would be allocated to another vm you provision in openstack. I hope that gives the answer.
On Mon, Apr 8, 2013 at 4:53 PM, Lei Zhang <zhang.lei....@gmail.com> wrote: > Hi Syed, > Thanks for you quickly reply. But What I want is HA between VMs not HA > between Physical Machine(Openstack Node/ Services) > > > On Mon, Apr 8, 2013 at 7:20 PM, Syed Armani <syed.arm...@hastexo.com>wrote: > >> Hi Lei Zhang, >> >> You can find more information about HA in OpenStack in this guide: >> http://docs.openstack.org/trunk/openstack-ha/content/index.html >> >> Best regards, >> Syed Armani >> >> On Monday 08 April 2013 04:46 PM, Lei Zhang wrote: >> > Hi all, >> > >> > I am using Folsom, and I want to set up a HA between VMs. For example, I >> > have two DB VMs. One is the primary and other is a slave. I want to use >> > Keepalive or pacemake to switch between them when one is failed. >> > >> > But how to implement this? Because in general, we need a dynamic IP to >> > associate to the VMs and change the relationship when necessary. But >> > which IP should be used ? Floating ip or Fixed IP? and how. >> > >> > -- >> > Lei Zhang >> > >> > Blog: http://jeffrey4l.github.com >> > twitter/weibo: @jeffrey4l >> > >> > >> > _______________________________________________ >> > Mailing list: https://launchpad.net/~openstack >> > Post to : openstack@lists.launchpad.net >> > Unsubscribe : https://launchpad.net/~openstack >> > More help : https://help.launchpad.net/ListHelp >> > >> >> > > > -- > Lei Zhang > > Blog: http://jeffrey4l.github.com > twitter/weibo: @jeffrey4l > > _______________________________________________ > Mailing list: https://launchpad.net/~openstack > Post to : openstack@lists.launchpad.net > Unsubscribe : https://launchpad.net/~openstack > More help : https://help.launchpad.net/ListHelp > > -- * With Regards * * Ritesh Nanda * *** * <http://www.ericsson.com/>
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