[systemd-devel] Using timedatectl on a readonly rootfile system using mender

[Vito Caputo]

Could you please stop signing mails sent to this publicly accessible,
archived, and indexed/searchable mailing list with this impossible
boilerplate:

> IMPORTANT: The contents of this email and any attachments are confidential.
> They are intended for the named recipient(s) only. If you have received
> this email by mistake, please notify the sender immediately and do not
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Thank you.


On Fri, Sep 04, 2020 at 06:16:06PM -0400, Shravan Singh wrote:
> What constitutes a configuration?
> And please read my email subject. I can't have writable /etc, mender
> dosen't allow that.
> 
> In today's mobile computing age you really think users shouldn't change
> timezone?
> You keep saying " I for one am certainly not convinced that the timezones"
> but you don't explain why?
> Are you looking at this system as a static machine? That can never change
> timezone?
> 
> And please don't use profanity. I have not and you shouldn't either.
> 
> Regards,
> Shravan Singh
> (239) 243-0838
> 
> Blue Sparq, Inc.
> 928 NE 24th Lane unit 4 and 5.
> Cape Coral, FL 33993
> 
> IMPORTANT: The contents of this email and any attachments are confidential.
> They are intended for the named recipient(s) only. If you have received
> this email by mistake, please notify the sender immediately and do not
> disclose the contents to anyone or make copies thereof.
> 
> 
> On Fri, Sep 4, 2020 at 6:05 PM Lennart Poettering <lennart at poettering.net>
> wrote:
> 
> > On Fr, 04.09.20 15:54, Shravan Singh (shravan at bluesparq.com) wrote:
> >
> > > Yes, But help me understand.
> > > I think you said that you are not convinced as to why that has to done.
> > >
> > > My argument is very simple shouldn't a Linux environment allow change in
> > > timezone easily?
> >
> > Oh we do. But if your want configuration to be changable, then mount
> > /etc writable.
> >
> > You have two contradicting goals: you want immutable config, but then
> > you want to change config. So how's that gonna work?
> >
> > If you want your persistent config changable then make it changable,
> > i.e. mount /etc/ writable.
> >
> > > Now I am not an expert in Linux kernel development. But I see that some
> > of
> > > the files, even though they reside in /etc  are linked to file in /run
> > > Like *resolv.conf.  *Which allows dynamic changes.
> >
> > I explained this already. DNS server data today is much less config
> > than state, acquired dynamically via DHCP, hence most distros don#t
> > configure it in /etc so much anymore, but manage it in /run (where
> > transient state is generally kept), and only keep a compat symlink in
> > /etc. If you try to convince people though that the local timezone
> > should just be transient state and not persistent config you'll have a
> > hard time. I for one am certainly not convinced that the timezones are
> > state...
> >
> > I mean, the line between persistent configuration and transient state
> > is blurry, but in the case of DNS settings and timezone settings I
> > certainly can draw a line easily.
> >
> > > timezone activity change is a very basic change one that needs to be
> > > supported by the system. Why guard it with so much.
> >
> > We don't do that. Just make /etc/ writable ffs, if you want stuff in
> > /etc to be changable.
> >
> > Lennart
> >
> > --
> > Lennart Poettering, Berlin
> >

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