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Sequential boot with systemd?

Started by"Steve Keller" <keller.steve@gmx.de>
First post2019-03-27 19:50 +0100
Last post2019-06-05 21:10 +0200
Articles 4 — 4 participants

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  Sequential boot with systemd? "Steve Keller" <keller.steve@gmx.de> - 2019-03-27 19:50 +0100
    Re: Sequential boot with system d? Brian <ad44@cityscape.co.uk> - 2019-03-27 21:20 +0100
    Re: Sequential boot with systemd? Darac Marjal <mailinglist@darac.org.uk> - 2019-03-27 22:20 +0100
    Re: Sequential boot with systemd? Andrei POPESCU <andreimpopescu@gmail.com> - 2019-06-05 21:10 +0200

#206687 — Sequential boot with systemd?

From"Steve Keller" <keller.steve@gmx.de>
Date2019-03-27 19:50 +0100
SubjectSequential boot with systemd?
Message-ID<xGlMB-3zY-1@gated-at.bofh.it>
Is it possible to configure systemd to *not* start services in
parallel?  I'd prefer deterministic boot with readable boot
messages.  With parallel start, messages of different services get
intermingled and it's much more difficult to identify possible
problems.

Steve

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#206691 — Re: Sequential boot with system d?

FromBrian <ad44@cityscape.co.uk>
Date2019-03-27 21:20 +0100
SubjectRe: Sequential boot with system d?
Message-ID<xGnbH-4zv-5@gated-at.bofh.it>
In reply to#206687
On Wed 27 Mar 2019 at 19:27:21 +0100, Steve Keller wrote:

> Is it possible to configure systemd to *not* start services in
> parallel?  I'd prefer deterministic boot with readable boot
> messages.  With parallel start, messages of different services get
> intermingled and it's much more difficult to identify possible
> problems.

Would Requires plus After get you going?

-- 
Brian.

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#206695

FromDarac Marjal <mailinglist@darac.org.uk>
Date2019-03-27 22:20 +0100
Message-ID<xGo7M-5ck-3@gated-at.bofh.it>
In reply to#206687
On 27/03/2019 18:27, Steve Keller wrote:
> Is it possible to configure systemd to *not* start services in
> parallel?  I'd prefer deterministic boot with readable boot
> messages.  With parallel start, messages of different services get
> intermingled and it's much more difficult to identify possible
> problems.
>
> Steve
>
Have you thought about installing plymouth? Most people know it for it's
"splash screen" capabilities, but it also acts as a boot message
manager. You may find that installing plymouth and using the "text" or
"details" themes clears up your messages.

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#209655

FromAndrei POPESCU <andreimpopescu@gmail.com>
Date2019-06-05 21:10 +0200
Message-ID<y5Jsl-Q0-3@gated-at.bofh.it>
In reply to#206687

[Multipart message — attachments visible in raw view] — view raw

On Mi, 27 mar 19, 19:27:21, Steve Keller wrote:
> Is it possible to configure systemd to *not* start services in
> parallel?

That would be very difficult to achieve with systemd, your best option 
would probably be to switch to sysv.

> I'd prefer deterministic boot with readable boot
> messages.  With parallel start, messages of different services get
> intermingled and it's much more difficult to identify possible
> problems.

Not an option for boot messages, but journalctl has some advanced 
filtering options that one can use, e.g. '-b -u ssh' will show only the 
messages from the current boot and from units matching the pattern 
'ssh'.

If you only care about possible problems -p (priority) could also be 
useful.

It shouldn't be very difficult to script something based on that.

Kind regards,
Andrei
-- 
http://wiki.debian.org/FAQsFromDebianUser

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