[systemd-devel] Emergency mode if non-critical /etc/fstab entries are missing

[Dave Reisner]

On Mon, Sep 26, 2016 at 11:35:51AM +1300, Sergei Franco wrote:
> Thank you for your quick reply.
> 
> I just tested this scenario on Ubuntu 12.04LTS (with upstart) and it
> present the following message:
> 
> The disk drive for /data is not ready yet or not present.
> keys:Continue to wait, or Press S to skip mounting or M for manual recovery
> 
> So it is not as big difference as I initially thought, except it is much
> easier to deal with by simply pressing S, while I believe there is no
> such option for systemd (it would be nice).

Making bootup potentially interactive in this manner is strictly worse
than dumping you into emergency mode. At least with emergency mode, you
might be able to add dependencies to emergency.target such that, for
example, an sshd comes up and an admin can login to the remote box.
How's this supposed to work with a random prompt which must be accessed
on /dev/console?  Enforce that everyone has some sort of out of band
console?

Unclear why you consider this a superior design decision...

> So in future for non crucial disks I will use nofail.
> 
> Best regards.
> 
> Sergei.
> 
> P.S. As advised I have replied to correct address.
> 
> On 26 September 2016 at 11:30, Reindl Harald <h.reindl at thelounge.net> wrote:
> 
>     if you post somehting to a mailing-list and you get a response on the list
>     POST REPLIES TO THE LIST - *period*
> 
>     Am 26.09.2016 um 00:28 schrieb Sergei Franco:
>    
>         Thank you for your quick reply.
> 
>         I just tested this scenario on Ubuntu 12.04LTS (with upstart) and it
>         present the following message:
> 
>         The disk drive for /data is not ready yet or not present.
>         keys:Continue to wait, or Press S to skip mounting or M for manual
>         recovery
> 
>         So it is not as big difference as I initially thought, except it is
>         much
>         easier to deal with by simply pressing S, while I believe there is no
>         such option for systemd (it would be nice).
> 
>         So in future for non crucial disks I will use nofail.
> 
>         Best regards.
> 
>         Sergei.
> 
>         On 26 September 2016 at 10:57, Reindl Harald <h.reindl at thelounge.net
>         <mailto:h.reindl at thelounge.net>> wrote:
> 
> 
> 
>             Am 25.09.2016 um 23:52 schrieb Sergei Franco:
> 
>                 I am looking at correct way to disable the "feature" of
>                 emergency mode
>                 when systemd encounters missing block device entires in fstab.
> 
>                 For example:
> 
>                 the following entry is in /etc/fstab:
>                 UUID=d4a23034-8cbe-44b3-92a5-3d38e1816eff /data             
>          xfs
>                 defaults        0       0
> 
>                 If the drive (d4a23034-8cbe-44b3-92a5-3d38e1816eff) has been
>                 detached
>                 and machine rebooted it stops booting with Emergency mode, even
>                 though
>                 the /data is not crucial for boot
> 
> 
>             RTFM - when you don't say "nofail" it's ecpected to be crucial
> 
>             your entry says it's crucial
> 
>             http://unix.stackexchange.com/questions/53456/what-is-the-di
>         fference-between-nobootwait-and-nofail-in-fstab
>             <http://unix.stackexchange.com/questions/53456/what-is-the-
>         difference-between-nobootwait-and-nofail-in-fstab>
> 
> 
> 
> 

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