[gentoo-user] another headless device-question: In search of the LAN
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
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 On 30/09/14 20:12, meino.cra...@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 Key: 0xB2D9F759 -BEGIN PGP SIGNATURE- Version: GnuPG v2 iF4EAREIAAYFAlQqg4cACgkQXcRKerLZ91lR1QD/QRzj0cc8To2BVRQQr6uFny2a maQkQwy14zwmqV0qFecA/07H01ZAIbOswnX3HMF3SVDcqcxW9K7UxtPKvUSxXDVN =CMvs -END PGP SIGNATURE-
Re: [gentoo-user] another headless device-question: In search of the LAN
On Tuesday 30 Sep 2014 11:12:34 meino.cra...@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 signature.asc Description: This is a digitally signed message part.
Re: [gentoo-user] another headless device-question: In search of the LAN
On 30/09/14 11:21, Mick wrote: On Tuesday 30 Sep 2014 11:12:34 meino.cra...@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
thegeezer thegee...@thegeezer.net [14-09-30 12:32]: On 30/09/14 11:21, Mick wrote: On Tuesday 30 Sep 2014 11:12:34 meino.cra...@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
On Tue, 30 Sep 2014 12:39:06 +0200, meino.cra...@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. signature.asc Description: PGP signature
Re: [gentoo-user] another headless device-question: In search of the LAN
Neil Bothwick n...@digimed.co.uk [14-09-30 12:44]: On Tue, 30 Sep 2014 12:39:06 +0200, meino.cra...@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
Neil Bothwick n...@digimed.co.uk [14-09-30 12:44]: On Tue, 30 Sep 2014 12:39:06 +0200, meino.cra...@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
On Tue, 30 Sep 2014 13:49:44 +0200, meino.cra...@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. signature.asc Description: PGP signature
Re: [gentoo-user] another headless device-question: In search of the LAN
On Tuesday 30 Sep 2014 12:49:44 meino.cra...@gmx.de wrote: Neil Bothwick n...@digimed.co.uk [14-09-30 12:44]: On Tue, 30 Sep 2014 12:39:06 +0200, meino.cra...@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 signature.asc Description: This is a digitally signed message part.
Re: [gentoo-user] another headless device-question: In search of the LAN
On Tuesday 30 Sep 2014 13:09:55 Neil Bothwick wrote: On Tue, 30 Sep 2014 13:49:44 +0200, meino.cra...@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 signature.asc Description: This is a digitally signed message part.
Re: [gentoo-user] another headless device-question: In search of the LAN
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? signature.asc Description: PGP signature
Re: [gentoo-user] another headless device-question: In search of the LAN
On 30/09/2014 12:49, meino.cra...@gmx.de wrote: Neil Bothwick n...@digimed.co.uk [14-09-30 12:44]: On Tue, 30 Sep 2014 12:39:06 +0200, meino.cra...@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
Kerin Millar kerfra...@fastmail.co.uk [14-09-30 15:08]:
On 30/09/2014 12:49, meino.cra...@gmx.de wrote:
Neil Bothwick n...@digimed.co.uk [14-09-30 12:44]:
On Tue, 30 Sep 2014 12:39:06 +0200, meino.cra...@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
On 30/09/2014 14:46, Kerin Millar wrote:
On 30/09/2014 14:42, meino.cra...@gmx.de wrote:
Kerin Millar kerfra...@fastmail.co.uk [14-09-30 15:08]:
On 30/09/2014 12:49, meino.cra...@gmx.de wrote:
Neil Bothwick n...@digimed.co.uk [14-09-30 12:44]:
On Tue, 30 Sep 2014 12:39:06 +0200, meino.cra...@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
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.
signature.asc
Description: PGP signature
Re: [gentoo-user] another headless device-question: In search of the LAN
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
On 30/09/2014 14:42, meino.cra...@gmx.de wrote:
Kerin Millar kerfra...@fastmail.co.uk [14-09-30 15:08]:
On 30/09/2014 12:49, meino.cra...@gmx.de wrote:
Neil Bothwick n...@digimed.co.uk [14-09-30 12:44]:
On Tue, 30 Sep 2014 12:39:06 +0200, meino.cra...@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
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!! signature.asc Description: PGP signature
Re: [gentoo-user] another headless device-question: In search of the LAN
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
Kerin Millar kerfra...@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
