FreeBSD on AWS with root-on-zfs?

Victor Sudakov vas at
Sun Mar 15 05:52:08 UTC 2020

Victor Sudakov wrote:
> Matthew Seaman wrote:
> > > Is anyone using FreeBSD as a EC2 instance, what would you do if you
> > > wanted a root-on-zfs AMI?
> > 
> > Colin Percival published some root-on-ZFS AMIs a while back -- see
> >
> Good news.
> > 
> > I've used these with great success.  I haven't seen an announcement of a
> > 12.1-RELEASE version yet -- not sure what Colin's plans are, but I think
> > the idea was to offer this layout as an additional set of the official
> > FreeBSD AMIs at some point.
> I've just launched an EC2 instance with "FreeBSD 12.0-RELEASE-amd64 ZFS
> (ami-054939ebd299da308)".  It works!
> I think I can freebsd-update it to 12.1 myself until a 12.1 AMI is
> available.
> Thanks! And I should go and support Colin's endeavor.

One of the major advantages of the root-on-ZFS configuration is the
possibility to select a different BE from the loader prompt if something
goes wrong with the current BE.

On AWS, the loader prompt is inaccesible, so how can we utilize this
powerful feature?

Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
2:5005/49 at fidonet
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