[ovirt-users] is ovirt-node.iso supposed to create a readonly filesystem?

[Jorick Astrego]

On Thu, 2014-04-10 at 08:02 -0500, Jeremiah Jahn wrote: 

> On Thu, Apr 10, 2014 at 5:46 AM, Fabian Deutsch <fabiand at redhat.com> wrote:
> > Am Donnerstag, den 10.04.2014, 09:19 +0300 schrieb Itamar Heim:
> >> On 04/09/2014 11:01 PM, Jeremiah Jahn wrote:
> >> > I'm assuming the answer is no. But for some reason I seem to be
> >>
> >> the answer is yes actually. if you want a host you can change, use plain
> >> fedora/rhel/centos as the host.
> >> Fabian can reply to the rest.
> >
> > Yep. Node has a read-only root filesystem, which has some overlays to
> > allow limited changes.
> 
> And yet I've been able to edit the /etc/hosts file before this
> problem? Does it go readonly after a while?



Actually /etc is mounted in tmpfs so not persistent:


        cat /proc/mounts |grep etc
        none /etc tmpfs
        rw,rootcontext=system_u:object_r:var_lib_t:s0,seclabel,relatime
        0 0

So if you want to change things you have to change it in "/config/etc/"

>> the answer is yes actually. if you want a host you can change, use
plain 

> >> fedora/rhel/centos as the host.
> >> Fabian can reply to the rest.


You can just as easily do a "mount -o rw,remount /" to edit things if you want but you have to do this on every node and again after upgrading to a newer version of node.

I see it's there in the wiki:

http://www.ovirt.org/Node_Troubleshooting#Making_changes_on_the_host


Kind regards,

Jorick Astrego
Netbulae B.V.

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