[gentoo-user] another "headless device"-question: In search of the LAN

[gentoo-user] another "headless device"-question: In search of the LAN

[meino.cramer]

Hi,

For a device (beaglebone black) I am looking for a solution
of the following problem:

This little computer boots a fully blown Gentoo linux. It is 
used mostly as headless device (capturing data from attached 
sensors).

From time to time I want access it via LAN.

If the device was booted without LAN attached, the configured
ethernet was not found and dhcpd fails.
So Gentoo goes into "no LAN"-mode (or something like that).



Is there a less "waiting for the timeout"-prone way to refresh
the status of the LAN beside putting the accoring init-script
into a cron job ???


Is there a way to check, whether a RJ45 was plugged into the 
device and if so to start init-script then?

Thank you very much in advance for any help!
Best regards,
mcc

Re: [gentoo-user] another "headless device"-question: In search of the LAN

[wraeth]

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On 30/09/14 20:12, meino.cramer@gmx.de wrote:
> Is there a way to check, whether a RJ45 was plugged into the device and if 
> so to start init-script then?

You could use a network management daemon that works on device status such as
net-misc/networkmanager (replacing the dhcpcd service but still making use of
the dhcpcd (or, if preferred, dhclient) utility).

- -- 
wraeth
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Re: [gentoo-user] another "headless device"-question: In search of the LAN

[Mick]

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On Tuesday 30 Sep 2014 11:12:34 meino.cramer@gmx.de wrote:
> Hi,
> 
> For a device (beaglebone black) I am looking for a solution
> of the following problem:
> 
> This little computer boots a fully blown Gentoo linux. It is
> used mostly as headless device (capturing data from attached
> sensors).
> 
> From time to time I want access it via LAN.
> 
> If the device was booted without LAN attached, the configured
> ethernet was not found and dhcpd fails.
> So Gentoo goes into "no LAN"-mode (or something like that).
> 
> 
> 
> Is there a less "waiting for the timeout"-prone way to refresh
> the status of the LAN beside putting the accoring init-script
> into a cron job ???
> 
> 
> Is there a way to check, whether a RJ45 was plugged into the
> device and if so to start init-script then?
> 
> Thank you very much in advance for any help!
> Best regards,
> mcc

Typically used on laptops:

[I] sys-apps/ifplugd
     Available versions:  
            0.28-r9	[doc selinux]
     Installed versions:  0.28-r9(11:14:57 12/18/10)(-doc)
     Homepage:            http://0pointer.de/lennart/projects/ifplugd/
     Description:         Brings up/down ethernet ports automatically with 
cable detection


-- 
Regards,
Mick

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Re: [gentoo-user] another "headless device"-question: In search of the LAN

[thegeezer]

On 30/09/14 11:21, Mick wrote:
> On Tuesday 30 Sep 2014 11:12:34 meino.cramer@gmx.de wrote:
>> Thank you very much in advance for any help!
>> Best regards,
>> mcc
> Typically used on laptops:
>
> [I] sys-apps/ifplugd
>      Available versions:  
>             0.28-r9	[doc selinux]
>      Installed versions:  0.28-r9(11:14:57 12/18/10)(-doc)
>      Homepage:            http://0pointer.de/lennart/projects/ifplugd/
>      Description:         Brings up/down ethernet ports automatically with 
> cable detection
>
>

and another alternative would be sys-apps/netplug

Re: [gentoo-user] another "headless device"-question: In search of the LAN

[meino.cramer]

thegeezer <thegeezer@thegeezer.net> [14-09-30 12:32]:
> On 30/09/14 11:21, Mick wrote:
> > On Tuesday 30 Sep 2014 11:12:34 meino.cramer@gmx.de wrote:
> >> Thank you very much in advance for any help!
> >> Best regards,
> >> mcc
> > Typically used on laptops:
> >
> > [I] sys-apps/ifplugd
> >      Available versions:  
> >             0.28-r9	[doc selinux]
> >      Installed versions:  0.28-r9(11:14:57 12/18/10)(-doc)
> >      Homepage:            http://0pointer.de/lennart/projects/ifplugd/
> >      Description:         Brings up/down ethernet ports automatically with 
> > cable detection
> >
> >
> 
> and another alternative would be sys-apps/netplug
> 


WHOW! That all sounds much more easier than I have dreamt of!
I did not thought, that such software exists already -- and therefore
did not search for it...

Great! Thanks a lot -- helps a lot here!

Best regards,
mcc

Re: [gentoo-user] another "headless device"-question: In search of the LAN

[Neil Bothwick]

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On Tue, 30 Sep 2014 12:39:06 +0200, meino.cramer@gmx.de wrote:

> > > [I] sys-apps/ifplugd
> > >      Available versions:  
> > >             0.28-r9	[doc selinux]
> > >      Installed versions:  0.28-r9(11:14:57 12/18/10)(-doc)
> > >      Homepage:
> > > http://0pointer.de/lennart/projects/ifplugd/ Description:
> > > Brings up/down ethernet ports automatically with cable detection

> > and another alternative would be sys-apps/netplug

> WHOW! That all sounds much more easier than I have dreamt of!
> I did not thought, that such software exists already -- and therefore
> did not search for it...

If you use openrc, you only need to install one of these programs, not
configure or set it to run. OpenRC detects that one of these programs is
available and uses it to do exactly what you need.


-- 
Neil Bothwick

We are upping our standards - so up yours.

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Re: [gentoo-user] another "headless device"-question: In search of the LAN

[meino.cramer]

Neil Bothwick <neil@digimed.co.uk> [14-09-30 12:44]:
> On Tue, 30 Sep 2014 12:39:06 +0200, meino.cramer@gmx.de wrote:
> 
> > > > [I] sys-apps/ifplugd
> > > >      Available versions:  
> > > >             0.28-r9	[doc selinux]
> > > >      Installed versions:  0.28-r9(11:14:57 12/18/10)(-doc)
> > > >      Homepage:
> > > > http://0pointer.de/lennart/projects/ifplugd/ Description:
> > > > Brings up/down ethernet ports automatically with cable detection
> 
> > > and another alternative would be sys-apps/netplug
> 
> > WHOW! That all sounds much more easier than I have dreamt of!
> > I did not thought, that such software exists already -- and therefore
> > did not search for it...
> 
> If you use openrc, you only need to install one of these programs, not
> configure or set it to run. OpenRC detects that one of these programs is
> available and uses it to do exactly what you need.
> 
> 
> -- 
> Neil Bothwick
> 
> We are upping our standards - so up yours.

Hi Neil,

...and there are people out there, which flee with lightspeed
in fear of complexity in that moment I will spell "c-o-m-m-a-n-d-l-i-n-e"
<grin>

Thanks a lot! Currently emerge is running... :)

Best regards,
mcc

Re: [gentoo-user] another "headless device"-question: In search of the LAN

[meino.cramer]

Neil Bothwick <neil@digimed.co.uk> [14-09-30 12:44]:
> On Tue, 30 Sep 2014 12:39:06 +0200, meino.cramer@gmx.de wrote:
> 
> > > > [I] sys-apps/ifplugd
> > > >      Available versions:  
> > > >             0.28-r9	[doc selinux]
> > > >      Installed versions:  0.28-r9(11:14:57 12/18/10)(-doc)
> > > >      Homepage:
> > > > http://0pointer.de/lennart/projects/ifplugd/ Description:
> > > > Brings up/down ethernet ports automatically with cable detection
> 
> > > and another alternative would be sys-apps/netplug
> 
> > WHOW! That all sounds much more easier than I have dreamt of!
> > I did not thought, that such software exists already -- and therefore
> > did not search for it...
> 
> If you use openrc, you only need to install one of these programs, not
> configure or set it to run. OpenRC detects that one of these programs is
> available and uses it to do exactly what you need.
> 
> 
> -- 
> Neil Bothwick
> 
> We are upping our standards - so up yours.

...ok, it works!
...nearly... ;)



Unfortunately, ntp-client is configured via rc-update (added to
"default") but after plugging in LAN the interface eth0 comes 
up and I have access via ssh...but the date is set to the beginnig
of the UNIX epoch.
I have to call ntp-client by hand.

Re: [gentoo-user] another "headless device"-question: In search of the LAN

[Neil Bothwick]

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On Tue, 30 Sep 2014 13:49:44 +0200, meino.cramer@gmx.de wrote:

> > If you use openrc, you only need to install one of these programs, not
> > configure or set it to run. OpenRC detects that one of these programs
> > is available and uses it to do exactly what you need.

> Unfortunately, ntp-client is configured via rc-update (added to
> "default") but after plugging in LAN the interface eth0 comes 
> up and I have access via ssh...but the date is set to the beginnig
> of the UNIX epoch.
> I have to call ntp-client by hand.

You could call it from postup() in /etc/conf.d/net. See net.example for
details.


-- 
Neil Bothwick

To be intoxicated is to feel sophisticated but not be able to say it.

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Re: [gentoo-user] another "headless device"-question: In search of the LAN

[Mick]

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On Tuesday 30 Sep 2014 13:09:55 Neil Bothwick wrote:
> On Tue, 30 Sep 2014 13:49:44 +0200, meino.cramer@gmx.de wrote:
> > > If you use openrc, you only need to install one of these programs, not
> > > configure or set it to run. OpenRC detects that one of these programs
> > > is available and uses it to do exactly what you need.
> > 
> > Unfortunately, ntp-client is configured via rc-update (added to
> > "default") but after plugging in LAN the interface eth0 comes
> > up and I have access via ssh...but the date is set to the beginnig
> > of the UNIX epoch.
> > I have to call ntp-client by hand.
> 
> You could call it from postup() in /etc/conf.d/net. See net.example for
> details.

Do you know of any difference between netplug and ifplug?  Pros & Cons kind of 
thing, or are they identical in their operation?

-- 
Regards,
Mick

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Re: [gentoo-user] another "headless device"-question: In search of the LAN

[Neil Bothwick]

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On Tue, 30 Sep 2014 13:16:48 +0100, Mick wrote:

> Do you know of any difference between netplug and ifplug?  Pros & Cons
> kind of thing, or are they identical in their operation?

I installed ifplugd and it just worked, so I've never tried netplug. But
openrc does the work now, it just uses those programs to tell when the
link is available.


-- 
Neil Bothwick

When companies ship Styrofoam, what do they pack it in?

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Re: [gentoo-user] another "headless device"-question: In search of the LAN

[Mick]

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On Tuesday 30 Sep 2014 12:49:44 meino.cramer@gmx.de wrote:
> Neil Bothwick <neil@digimed.co.uk> [14-09-30 12:44]:
> > On Tue, 30 Sep 2014 12:39:06 +0200, meino.cramer@gmx.de wrote:
> > > > > [I] sys-apps/ifplugd
> > > > > 
> > > > >      Available versions:
> > > > >             0.28-r9	[doc selinux]
> > > > >      
> > > > >      Installed versions:  0.28-r9(11:14:57 12/18/10)(-doc)
> > > > > 
> > > > >      Homepage:
> > > > > http://0pointer.de/lennart/projects/ifplugd/ Description:
> > > > > Brings up/down ethernet ports automatically with cable detection
> > > > 
> > > > and another alternative would be sys-apps/netplug
> > > 
> > > WHOW! That all sounds much more easier than I have dreamt of!
> > > I did not thought, that such software exists already -- and therefore
> > > did not search for it...
> > 
> > If you use openrc, you only need to install one of these programs, not
> > configure or set it to run. OpenRC detects that one of these programs is
> > available and uses it to do exactly what you need.
> 
> ...ok, it works!
> ...nearly... ;)
> 
> 
> 
> Unfortunately, ntp-client is configured via rc-update (added to
> "default") but after plugging in LAN the interface eth0 comes
> up and I have access via ssh...but the date is set to the beginnig
> of the UNIX epoch.
> I have to call ntp-client by hand.

Or instead use chrony?

-- 
Regards,
Mick

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[gentoo-user] Re: another "headless device"-question: In search of the LAN

[James]

 <meino.cramer <at> gmx.de> writes:


> Unfortunately, ntp-client is configured via rc-update (added to
> "default") but after plugging in LAN the interface eth0 comes 
> up and I have access via ssh...but the date is set to the beginnig
> of the UNIX epoch.  I have to call ntp-client by hand.

Meino,


Make sure your system time (hwclock) is properly set upon bootup.
Since you are running on an embedded hardware board, I'd look at 
those docs and find a forum as to the specifics of how the hardware
clock is set and maintained on the board. Once you get it close,
then ntp should be configuration.

man hwclock

hth,
James

Re: [gentoo-user] Re: another "headless device"-question: In search of the LAN

[meino.cramer]

James <wireless@tampabay.rr.com> [14-09-30 14:24]:
>  <meino.cramer <at> gmx.de> writes:
> 
> 
> > Unfortunately, ntp-client is configured via rc-update (added to
> > "default") but after plugging in LAN the interface eth0 comes 
> > up and I have access via ssh...but the date is set to the beginnig
> > of the UNIX epoch.  I have to call ntp-client by hand.
> 
> Meino,
> 
> 
> Make sure your system time (hwclock) is properly set upon bootup.
> Since you are running on an embedded hardware board, I'd look at 
> those docs and find a forum as to the specifics of how the hardware
> clock is set and maintained on the board. Once you get it close,
> then ntp should be configuration.
> 
> man hwclock
> 
> hth,
> James
> 
> 
> 
> 
> 

Hi James,

...the system has no built-in RTC which still runs if the system is
powered off.
After power is up and eth0 is alive, the time/date has to be set via 
ntp-client. The rest already working.
I called 
    /etc/init.d/ntp-client start
after booting the little beast and plugging in the RJ45 and everything
else was fine.
Currently I am experimenting with chrony (emerging).
Will see, if this will make a difference ;)

Best
mcc

Re: [gentoo-user] Re: another "headless device"-question: In search of the LAN

[Neil Bothwick]

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On Tue, 30 Sep 2014 14:34:28 +0200, meino.cramer@gmx.de wrote:

> ...the system has no built-in RTC which still runs if the system is
> powered off.
> After power is up and eth0 is alive, the time/date has to be set via 
> ntp-client. The rest already working.
> I called 
>     /etc/init.d/ntp-client start
> after booting the little beast and plugging in the RJ45 and everything
> else was fine.
> Currently I am experimenting with chrony (emerging).
> Will see, if this will make a difference ;)

Disclaimer: I've never used chrony.

The trouble with any program that polls regularly, as I assume chrony
does, is that you have a window between the interface coming up and the
clock being set. It makes more sense to me to use postup() to set the
clock as soon as the interface comes up, whether you call ntp-client or
chrony to do this.


-- 
Neil Bothwick

The trouble with life is that you are halfway through it before you
realize it's a "do it yourself" thing.

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Re: [gentoo-user] Re: another "headless device"-question: In search of the LAN

[wraeth]

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Hash: SHA256

On 30/09/14 22:37, Neil Bothwick wrote:
> The trouble with any program that polls regularly, as I assume chrony does,
> is that you have a window between the interface coming up and the clock
> being set. It makes more sense to me to use postup() to set the clock as
> soon as the interface comes up, whether you call ntp-client or chrony to do
> this.

FWIW, there's a dispatcher script you can use (at least with NM) that calls
chrony and sets it to online mode.

- -- 
wraeth
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Re: [gentoo-user] Re: another "headless device"-question: In search of the LAN

[wraeth]

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On 30/09/14 22:39, wraeth wrote:
> FWIW, there's a dispatcher script you can use (at least with NM) that
> calls chrony and sets it to online mode.

Sorry, to clarify: when NetworkManager comes online, it can execute scripts
placed in /etc/NetworkManager/dispatcher.d. There's a script I came across [0]
that, when placed in the dispatcher directory, brings chrony online and syncs
time.

[0] https://aur.archlinux.org/packages/networkmanager-dispatcher-chrony/
- -- 
wraeth
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Re: [gentoo-user] Re: another "headless device"-question: In search of the LAN

[meino.cramer]

wraeth <wraeth@wraeth.id.au> [14-09-30 14:44]:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA256
> 
> On 30/09/14 22:39, wraeth wrote:
> > FWIW, there's a dispatcher script you can use (at least with NM) that
> > calls chrony and sets it to online mode.
> 
> Sorry, to clarify: when NetworkManager comes online, it can execute scripts
> placed in /etc/NetworkManager/dispatcher.d. There's a script I came across [0]
> that, when placed in the dispatcher directory, brings chrony online and syncs
> time.
> 
> [0] https://aur.archlinux.org/packages/networkmanager-dispatcher-chrony/
> - -- 
> wraeth
> Key: 0xB2D9F759
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> =8Qc8
> -----END PGP SIGNATURE-----
> 

This feels little bit less than a k.i.s.s. ... ;)

I put a call of
    /etc/init.d/ntp-client restart
into 
    postup() { }
of /etc/conf.d/net

which is a little more like a k.i.s.s. ;)
Like that...runs fine and fast. And only once...no polling
on this little machine.

Thanks you all again for all the ideas and help! 

Best regards,
mcc

Re: [gentoo-user] Re: another "headless device"-question: In search of the LAN

[Poison BL.]

On Tue, Sep 30, 2014 at 8:34 AM,  <meino.cramer@gmx.de> wrote:
> James <wireless@tampabay.rr.com> [14-09-30 14:24]:
>> Meino,
>>
>>
>> Make sure your system time (hwclock) is properly set upon bootup.
>> Since you are running on an embedded hardware board, I'd look at
>> those docs and find a forum as to the specifics of how the hardware
>> clock is set and maintained on the board. Once you get it close,
>> then ntp should be configuration.
>>
>> man hwclock
>>
>> hth,
>> James
>>
>>
>
> Hi James,
>
> ...the system has no built-in RTC which still runs if the system is
> powered off.
> After power is up and eth0 is alive, the time/date has to be set via
> ntp-client. The rest already working.
> I called
>     /etc/init.d/ntp-client start
> after booting the little beast and plugging in the RJ45 and everything
> else was fine.
> Currently I am experimenting with chrony (emerging).
> Will see, if this will make a difference ;)
>
> Best
> mcc
>

The trick for bringing the clock into the right era after boot on a
system like that one (and what's used in raspbian for the pi) is to,
at shutdown, write the current date/time into a file. Then, on boot,
set the date/time to what that file has, meaning it won't be perfectly
accurate, but it will be considerably closer until ntp's available to
it again. The most important thing that accomplishes for me is, while
it doesn't keep the wall clock times accurate, maintaining the right
order of times on log messages, etc. It also prevents a lot of issues
with log and backup rotations that depend on 'which file is newer?',
etc.

-- 
Poison [BLX]
Joshua M. Murphy

Re: [gentoo-user] another "headless device"-question: In search of the LAN

[Kerin Millar]

On 30/09/2014 12:49, meino.cramer@gmx.de wrote:
> Neil Bothwick <neil@digimed.co.uk> [14-09-30 12:44]:
>> On Tue, 30 Sep 2014 12:39:06 +0200, meino.cramer@gmx.de wrote:
>>
>>>>> [I] sys-apps/ifplugd
>>>>>       Available versions:
>>>>>              0.28-r9	[doc selinux]
>>>>>       Installed versions:  0.28-r9(11:14:57 12/18/10)(-doc)
>>>>>       Homepage:
>>>>> http://0pointer.de/lennart/projects/ifplugd/ Description:
>>>>> Brings up/down ethernet ports automatically with cable detection
>>
>>>> and another alternative would be sys-apps/netplug
>>
>>> WHOW! That all sounds much more easier than I have dreamt of!
>>> I did not thought, that such software exists already -- and therefore
>>> did not search for it...
>>
>> If you use openrc, you only need to install one of these programs, not
>> configure or set it to run. OpenRC detects that one of these programs is
>> available and uses it to do exactly what you need.
>>
>>
>> --
>> Neil Bothwick
>>
>> We are upping our standards - so up yours.
>
> ...ok, it works!
> ...nearly... ;)
>
>
>
> Unfortunately, ntp-client is configured via rc-update (added to
> "default") but after plugging in LAN the interface eth0 comes
> up and I have access via ssh...but the date is set to the beginnig
> of the UNIX epoch.
> I have to call ntp-client by hand.

If you know that net.eth0 is specifically required to be up for 
ntp-client to work, you should render OpenRC aware of the fact:

echo 'rc_need="net.eth0"' >> /etc/conf.d/ntp-client

--Kerin

Re: [gentoo-user] another "headless device"-question: In search of the LAN

[meino.cramer]

Kerin Millar <kerframil@fastmail.co.uk> [14-09-30 15:08]:
> On 30/09/2014 12:49, meino.cramer@gmx.de wrote:
> >Neil Bothwick <neil@digimed.co.uk> [14-09-30 12:44]:
> >>On Tue, 30 Sep 2014 12:39:06 +0200, meino.cramer@gmx.de wrote:
> >>
> >>>>>[I] sys-apps/ifplugd
> >>>>>      Available versions:
> >>>>>             0.28-r9	[doc selinux]
> >>>>>      Installed versions:  0.28-r9(11:14:57 12/18/10)(-doc)
> >>>>>      Homepage:
> >>>>>http://0pointer.de/lennart/projects/ifplugd/ Description:
> >>>>>Brings up/down ethernet ports automatically with cable detection
> >>
> >>>>and another alternative would be sys-apps/netplug
> >>
> >>>WHOW! That all sounds much more easier than I have dreamt of!
> >>>I did not thought, that such software exists already -- and 
> >>>therefore
> >>>did not search for it...
> >>
> >>If you use openrc, you only need to install one of these programs, 
> >>not
> >>configure or set it to run. OpenRC detects that one of these programs 
> >>is
> >>available and uses it to do exactly what you need.
> >>
> >>
> >>--
> >>Neil Bothwick
> >>
> >>We are upping our standards - so up yours.
> >
> >...ok, it works!
> >...nearly... ;)
> >
> >
> >
> >Unfortunately, ntp-client is configured via rc-update (added to
> >"default") but after plugging in LAN the interface eth0 comes
> >up and I have access via ssh...but the date is set to the beginnig
> >of the UNIX epoch.
> >I have to call ntp-client by hand.
> 
> If you know that net.eth0 is specifically required to be up for 
> ntp-client to work, you should render OpenRC aware of the fact:
> 
> echo 'rc_need="net.eth0"' >> /etc/conf.d/ntp-client
> 
> --Kerin
> 

Hi Kerin,

I tried a similiar thing:

#!/sbin/runscript
# Copyright 1999-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/net-misc/ntp/files/ntp-client.rc,v 1.13 2013/12/24 11:01:52 vapier Exp $

depend() {
        before cron portmap
        after eth0
        use dns logger
}


for "after XYZ"
I set 
    net
    net.eth0
    eth0
and none worked for me...

Best regards,
mcc

Re: [gentoo-user] another "headless device"-question: In search of the LAN

[Kerin Millar]

On 30/09/2014 14:42, meino.cramer@gmx.de wrote:
> Kerin Millar <kerframil@fastmail.co.uk> [14-09-30 15:08]:
>> On 30/09/2014 12:49, meino.cramer@gmx.de wrote:
>>> Neil Bothwick <neil@digimed.co.uk> [14-09-30 12:44]:
>>>> On Tue, 30 Sep 2014 12:39:06 +0200, meino.cramer@gmx.de wrote:
>>>>
>>>>>>> [I] sys-apps/ifplugd
>>>>>>>       Available versions:
>>>>>>>              0.28-r9	[doc selinux]
>>>>>>>       Installed versions:  0.28-r9(11:14:57 12/18/10)(-doc)
>>>>>>>       Homepage:
>>>>>>> http://0pointer.de/lennart/projects/ifplugd/ Description:
>>>>>>> Brings up/down ethernet ports automatically with cable detection
>>>>
>>>>>> and another alternative would be sys-apps/netplug
>>>>
>>>>> WHOW! That all sounds much more easier than I have dreamt of!
>>>>> I did not thought, that such software exists already -- and
>>>>> therefore
>>>>> did not search for it...
>>>>
>>>> If you use openrc, you only need to install one of these programs,
>>>> not
>>>> configure or set it to run. OpenRC detects that one of these programs
>>>> is
>>>> available and uses it to do exactly what you need.
>>>>
>>>>
>>>> --
>>>> Neil Bothwick
>>>>
>>>> We are upping our standards - so up yours.
>>>
>>> ...ok, it works!
>>> ...nearly... ;)
>>>
>>>
>>>
>>> Unfortunately, ntp-client is configured via rc-update (added to
>>> "default") but after plugging in LAN the interface eth0 comes
>>> up and I have access via ssh...but the date is set to the beginnig
>>> of the UNIX epoch.
>>> I have to call ntp-client by hand.
>>
>> If you know that net.eth0 is specifically required to be up for
>> ntp-client to work, you should render OpenRC aware of the fact:
>>
>> echo 'rc_need="net.eth0"' >> /etc/conf.d/ntp-client
>>
>> --Kerin
>>
>
> Hi Kerin,
>
> I tried a similiar thing:
>
> #!/sbin/runscript
> # Copyright 1999-2013 Gentoo Foundation
> # Distributed under the terms of the GNU General Public License v2
> # $Header: /var/cvsroot/gentoo-x86/net-misc/ntp/files/ntp-client.rc,v 1.13 2013/12/24 11:01:52 vapier Exp $
>
> depend() {
>          before cron portmap
>          after eth0
>          use dns logger
> }
>
>
> for "after XYZ"
> I set
>      net
>      net.eth0
>      eth0
> and none worked for me...

Using 'after' won't work unless both net.eth0 and ntp-client are in the 
default runlevel. Obviously, that condition is not satisfied if you are 
using ifplugd. Please try the solution mentioned in my previous post. It 
should work.

--Kerin

Re: [gentoo-user] another "headless device"-question: In search of the LAN

[Kerin Millar]

On 30/09/2014 14:46, Kerin Millar wrote:
> On 30/09/2014 14:42, meino.cramer@gmx.de wrote:
>> Kerin Millar <kerframil@fastmail.co.uk> [14-09-30 15:08]:
>>> On 30/09/2014 12:49, meino.cramer@gmx.de wrote:
>>>> Neil Bothwick <neil@digimed.co.uk> [14-09-30 12:44]:
>>>>> On Tue, 30 Sep 2014 12:39:06 +0200, meino.cramer@gmx.de wrote:
>>>>>
>>>>>>>> [I] sys-apps/ifplugd
>>>>>>>>       Available versions:
>>>>>>>>              0.28-r9    [doc selinux]
>>>>>>>>       Installed versions:  0.28-r9(11:14:57 12/18/10)(-doc)
>>>>>>>>       Homepage:
>>>>>>>> http://0pointer.de/lennart/projects/ifplugd/ Description:
>>>>>>>> Brings up/down ethernet ports automatically with cable detection
>>>>>
>>>>>>> and another alternative would be sys-apps/netplug
>>>>>
>>>>>> WHOW! That all sounds much more easier than I have dreamt of!
>>>>>> I did not thought, that such software exists already -- and
>>>>>> therefore
>>>>>> did not search for it...
>>>>>
>>>>> If you use openrc, you only need to install one of these programs,
>>>>> not
>>>>> configure or set it to run. OpenRC detects that one of these programs
>>>>> is
>>>>> available and uses it to do exactly what you need.
>>>>>
>>>>>
>>>>> --
>>>>> Neil Bothwick
>>>>>
>>>>> We are upping our standards - so up yours.
>>>>
>>>> ...ok, it works!
>>>> ...nearly... ;)
>>>>
>>>>
>>>>
>>>> Unfortunately, ntp-client is configured via rc-update (added to
>>>> "default") but after plugging in LAN the interface eth0 comes
>>>> up and I have access via ssh...but the date is set to the beginnig
>>>> of the UNIX epoch.
>>>> I have to call ntp-client by hand.
>>>
>>> If you know that net.eth0 is specifically required to be up for
>>> ntp-client to work, you should render OpenRC aware of the fact:
>>>
>>> echo 'rc_need="net.eth0"' >> /etc/conf.d/ntp-client
>>>
>>> --Kerin
>>>
>>
>> Hi Kerin,
>>
>> I tried a similiar thing:
>>
>> #!/sbin/runscript
>> # Copyright 1999-2013 Gentoo Foundation
>> # Distributed under the terms of the GNU General Public License v2
>> # $Header: /var/cvsroot/gentoo-x86/net-misc/ntp/files/ntp-client.rc,v
>> 1.13 2013/12/24 11:01:52 vapier Exp $
>>
>> depend() {
>>          before cron portmap
>>          after eth0
>>          use dns logger
>> }
>>
>>
>> for "after XYZ"
>> I set
>>      net
>>      net.eth0
>>      eth0
>> and none worked for me...
>
> Using 'after' won't work unless both net.eth0 and ntp-client are in the
> default runlevel. Obviously, that condition is not satisfied if you are
> using ifplugd. Please try the solution mentioned in my previous post. It
> should work.

On second thoughts, it might have the unintended affect of starting 
net.eth0 before iplugd does. If you try it, let me know how it goes.

--Kerin

Re: [gentoo-user] another "headless device"-question: In search of the LAN

[Neil Bothwick]

[-- Attachment #1: Type: text/plain, Size: 813 bytes --]

On Tue, 30 Sep 2014 14:46:46 +0100, Kerin Millar wrote:

> > depend() {
> >          before cron portmap
> >          after eth0
> >          use dns logger
> > }
> >
> >
> > for "after XYZ"
> > I set
> >      net
> >      net.eth0
> >      eth0
> > and none worked for me...  
> 
> Using 'after' won't work unless both net.eth0 and ntp-client are in the 
> default runlevel. Obviously, that condition is not satisfied if you are 
> using ifplugd. Please try the solution mentioned in my previous post.
> It should work.

ifplugd shouldn't be in any runlevel, it is just there for openrc to use.

I suspect that the problem is that eth0 is up but inactive, so services
depending on it start but are unable to contact the network.


-- 
Neil Bothwick

All generalizations are false.

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Re: [gentoo-user] another "headless device"-question: In search of the LAN

[Kerin Millar]

On 30/09/2014 14:58, Neil Bothwick wrote:
> On Tue, 30 Sep 2014 14:46:46 +0100, Kerin Millar wrote:
>
>>> depend() {
>>>           before cron portmap
>>>           after eth0
>>>           use dns logger
>>> }
>>>
>>>
>>> for "after XYZ"
>>> I set
>>>       net
>>>       net.eth0
>>>       eth0
>>> and none worked for me...
>>
>> Using 'after' won't work unless both net.eth0 and ntp-client are in the
>> default runlevel. Obviously, that condition is not satisfied if you are
>> using ifplugd. Please try the solution mentioned in my previous post.
>> It should work.
>
> ifplugd shouldn't be in any runlevel, it is just there for openrc to use.

I did not claim or suggest otherwise.

--Kerin

Re: [gentoo-user] another "headless device"-question: In search of the LAN

[Neil Bothwick]

[-- Attachment #1: Type: text/plain, Size: 689 bytes --]

On Tue, 30 Sep 2014 15:00:39 +0100, Kerin Millar wrote:

> >> Using 'after' won't work unless both net.eth0 and ntp-client are in
> >> the default runlevel. Obviously, that condition is not satisfied if
> >> you are using ifplugd. Please try the solution mentioned in my
> >> previous post. It should work.  
> >
> > ifplugd shouldn't be in any runlevel, it is just there for openrc to
> > use.  
> 
> I did not claim or suggest otherwise.

Your suggestion that net.eth0 was not in the default runlevel if using
ifplugd suggested that ifplugd was, otherwise the interface would never
be started.


-- 
Neil Bothwick

Growing old is mandatory; growing up is optional!!

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Re: [gentoo-user] another "headless device"-question: In search of the LAN

[Kerin Millar]

On 30/09/2014 15:03, Neil Bothwick wrote:
> On Tue, 30 Sep 2014 15:00:39 +0100, Kerin Millar wrote:
>
>>>> Using 'after' won't work unless both net.eth0 and ntp-client are in
>>>> the default runlevel. Obviously, that condition is not satisfied if
>>>> you are using ifplugd. Please try the solution mentioned in my
>>>> previous post. It should work.
>>>
>>> ifplugd shouldn't be in any runlevel, it is just there for openrc to
>>> use.
>>
>> I did not claim or suggest otherwise.
>
> Your suggestion that net.eth0 was not in the default runlevel if using
> ifplugd suggested that ifplugd was, otherwise the interface would never
> be started.

No it it didn't. I pointed out that his attempt to use 'after' could 
never have worked. I did so by explaining the exact conditions under 
which 'after' would have made a difference.

Aside from that, I am well aware that he is using ifplugd and how it works.

--Kerin

Re: [gentoo-user] another "headless device"-question: In search of the LAN

[meino.cramer]

Kerin Millar <kerframil@fastmail.co.uk> [14-09-30 16:04]:
> On 30/09/2014 14:58, Neil Bothwick wrote:
> >On Tue, 30 Sep 2014 14:46:46 +0100, Kerin Millar wrote:
> >
> >>>depend() {
> >>>          before cron portmap
> >>>          after eth0
> >>>          use dns logger
> >>>}
> >>>
> >>>
> >>>for "after XYZ"
> >>>I set
> >>>      net
> >>>      net.eth0
> >>>      eth0
> >>>and none worked for me...
> >>
> >>Using 'after' won't work unless both net.eth0 and ntp-client are in 
> >>the
> >>default runlevel. Obviously, that condition is not satisfied if you 
> >>are
> >>using ifplugd. Please try the solution mentioned in my previous post.
> >>It should work.
> >
> >ifplugd shouldn't be in any runlevel, it is just there for openrc to 
> >use.
> 
> I did not claim or suggest otherwise.
> 
> --Kerin
> 

I already have a solution in a file which is a user alterable
file:
I just put a call to ntp-client in the postup(){} function
of /etc/conf.d/net. Called once and no polling and straight forward.
And if an update to that file will happen, cfg-update will keep track
of it.
I am happy with that.

Best regards,
mcc