I use resflash to build read-only images for my router: https://gitlab.com/bconway/resflash/tree/master/
It's not quite a standard OpenBSD installation, but it's pretty close. However, unless you're using really bad install media (like USB flash memory or something) I don't think OpenBSD is very likely to suffer a corrupted filesystem even on power outage unless you're doing very heavy IO (and even then it's probably fine). -- Jarkko On Thu, 2018-11-15 at 15:26 +0100, jean-yves boisiaud wrote: > hello, > > for more than 10 years, I install OpenBSD to serve as firewalls and > VPN > IPSec or OpenVPN. > > Some of these firewalls are near my office, while other are far away. > > Most of them are not used with an UPS. It is the main reason why I > decided > to use root FS mounted RO. /tmp, /dev, /var and /var/log are mounted > into > RAM using mfs and a skeleton. > > It worked fine during these 10 years. > > Now, OpenBSD needs root FS mounted RW. And, from 6.4, even if fstab > says > root fs to be mounted RO, it stays RW and it is not possible to > remount it > RO manually. And lsof has been retired... > > Is there any people, who like me used root FS read only, and are now > in > trouble ? > > Is there a way to use OpenBSD 6.4 resilient to power outage without > UPS > when root FS is mounted RW ? I am ready to use memory filesystem for > /var > and /var/log. > > Or, is there a simple way to use root FS RO with OpenBSD 6.4 and > above ? > -- Jarkko Oranen <[email protected]>
