Re: [systemd-devel] Netconsole NG
On 08.04.2014 23:27, poma wrote:
On 08.04.2014 14:25, Tom Gundersen wrote:
On Tue, Apr 8, 2014 at 2:10 PM, poma pomidorabelis...@gmail.com wrote:
On 08.04.2014 04:03, poma wrote:
On 07.04.2014 19:55, Zbigniew Jędrzejewski-Szmek wrote:
On Mon, Apr 07, 2014 at 05:34:10PM +0200, Lukáš Nykrýn wrote:
The reason why this was not rewritten a long time ago is that the
initscript tries to figure some of those values by itself (for
example the MAC address). But yes, we need to do something with
netconsole. It is a blocker for my initscripts evil plan.
Doesn't netconsole figure out most of those settings by itself, and
others default to sensible values, so if the network card is up
and has an address configured, only the device and target ip must be
given?
Dne 6.4.2014 17:59, poma napsal(a):
/etc/sysconfig/netconsole:
# This is the EnvironmentFile for the netconsole service. Starting this
# service enables the capture of dmesg output on a destination machine.
# Source port
SRC_PORT=12345
This should default to empty... Kernel will pick something.
# Source IP address
SRC_IP=192.168.1.2
This should default to empty... Kernel will use configured address,
since we order after network.target anyway.
# Source network device
SRC_DEV=enp1s2
Maybe this can be made into a instance argument?
# Destination port
DST_PORT=12345
I think this should default to 514/syslog, and can be left unset.
# Destination IP address
DST_IP=192.168.1.1
# Destination ethernet address
DST_EHA=00:11:22:33:44:55
This should default to unset. The kernel will query it if not set.
/usr/lib/systemd/system/netconsole.service:
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole
This is Fedora/RH specific. But I don't know what the proper path should
be, so maybe this is OK for now.
Type=simple
This is the default... No need to specify.
RemainAfterExit=yes
ExecStart=/usr/sbin/modprobe netconsole
This should be /sbin/modprobe for compatibility with split root.
netconsole=${SRC_PORT}@${SRC_IP}/${SRC_DEV},${DST_PORT}@${DST_IP}/${DST_EHA}
ExecStop=/usr/sbin/modprobe -r netconsole
Ditto.
[Install]
WantedBy=multi-user.target
That's a really late... But I don't see a better place unfortunately.
The original SysV netconsole service with related config - still in use,
https://git.fedorahosted.org/cgit/initscripts.git/plain/rc.d/init.d/netconsole
https://git.fedorahosted.org/cgit/initscripts.git/plain/sysconfig/netconsole
Feel free to comment.
Looks like an improvement on status quo.
Zbyszek
Shall we still leave something for users to configure.
Thanks for your review.
$ cat /usr/lib/systemd/system/netconsole-zbyszek.service
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole-zbyszek
RemainAfterExit=yes
ExecStart=/sbin/modprobe netconsole netconsole=@/${SRC_DEV},@${DST_IP}/
ExecStop=/sbin/modprobe -r netconsole
[Install]
WantedBy=multi-user.target
~~~
$ cat /etc/sysconfig/netconsole-zbyszek
# This is the EnvironmentFile for the netconsole service. Starting this
# service enables the capture of dmesg output on a destination machine.
# Source network device
SRC_DEV=enp1s2
# Destination IP address
DST_IP=192.168.1.1
~~~
$ dmesg | grep netcon
[ 24.361611] netpoll: netconsole: local port 6665
[ 24.361764] netpoll: netconsole: local IPv4 address 0.0.0.0
[ 24.361893] netpoll: netconsole: interface 'enp1s2'
[ 24.362061] netpoll: netconsole: remote port
[ 24.362344] netpoll: netconsole: remote IPv4 address 192.168.1.1
[ 24.362635] netpoll: netconsole: remote ethernet address
ff:ff:ff:ff:ff:ff
[ 24.362909] netpoll: netconsole: no IP address for enp1s2, aborting
[ 24.363186] netconsole: cleaning up
~
This turns out to be a bare minimum, i.e.
# modprobe netconsole netconsole=@/enp1s2,@192.168.1.1/
but that is also squeeze breeze ...
~
$ cat /usr/lib/systemd/system/netconsole-poma.service
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole-poma
RemainAfterExit=yes
ExecStart=/sbin/modprobe netconsole
netconsole=@${SRC_IP}/${SRC_DEV},@${DST_IP}/
ExecStop=/sbin/modprobe -r netconsole
[Install]
WantedBy=multi-user.target
$ cat /etc/sysconfig/netconsole-poma
# This is the EnvironmentFile for the netconsole service. Starting this
# service enables the capture of dmesg output on a destination machine.
# Source IP address
SRC_IP=192.168.1.2
# Source network
Re: [systemd-devel] Netconsole NG
On 08.04.2014 04:03, poma wrote:
On 07.04.2014 19:55, Zbigniew Jędrzejewski-Szmek wrote:
On Mon, Apr 07, 2014 at 05:34:10PM +0200, Lukáš Nykrýn wrote:
The reason why this was not rewritten a long time ago is that the
initscript tries to figure some of those values by itself (for
example the MAC address). But yes, we need to do something with
netconsole. It is a blocker for my initscripts evil plan.
Doesn't netconsole figure out most of those settings by itself, and
others default to sensible values, so if the network card is up
and has an address configured, only the device and target ip must be given?
Dne 6.4.2014 17:59, poma napsal(a):
/etc/sysconfig/netconsole:
# This is the EnvironmentFile for the netconsole service. Starting this
# service enables the capture of dmesg output on a destination machine.
# Source port
SRC_PORT=12345
This should default to empty... Kernel will pick something.
# Source IP address
SRC_IP=192.168.1.2
This should default to empty... Kernel will use configured address,
since we order after network.target anyway.
# Source network device
SRC_DEV=enp1s2
Maybe this can be made into a instance argument?
# Destination port
DST_PORT=12345
I think this should default to 514/syslog, and can be left unset.
# Destination IP address
DST_IP=192.168.1.1
# Destination ethernet address
DST_EHA=00:11:22:33:44:55
This should default to unset. The kernel will query it if not set.
/usr/lib/systemd/system/netconsole.service:
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole
This is Fedora/RH specific. But I don't know what the proper path should
be, so maybe this is OK for now.
Type=simple
This is the default... No need to specify.
RemainAfterExit=yes
ExecStart=/usr/sbin/modprobe netconsole
This should be /sbin/modprobe for compatibility with split root.
netconsole=${SRC_PORT}@${SRC_IP}/${SRC_DEV},${DST_PORT}@${DST_IP}/${DST_EHA}
ExecStop=/usr/sbin/modprobe -r netconsole
Ditto.
[Install]
WantedBy=multi-user.target
That's a really late... But I don't see a better place unfortunately.
The original SysV netconsole service with related config - still in use,
https://git.fedorahosted.org/cgit/initscripts.git/plain/rc.d/init.d/netconsole
https://git.fedorahosted.org/cgit/initscripts.git/plain/sysconfig/netconsole
Feel free to comment.
Looks like an improvement on status quo.
Zbyszek
Shall we still leave something for users to configure.
Thanks for your review.
$ cat /usr/lib/systemd/system/netconsole-zbyszek.service
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole-zbyszek
RemainAfterExit=yes
ExecStart=/sbin/modprobe netconsole netconsole=@/${SRC_DEV},@${DST_IP}/
ExecStop=/sbin/modprobe -r netconsole
[Install]
WantedBy=multi-user.target
~~~
$ cat /etc/sysconfig/netconsole-zbyszek
# This is the EnvironmentFile for the netconsole service. Starting this
# service enables the capture of dmesg output on a destination machine.
# Source network device
SRC_DEV=enp1s2
# Destination IP address
DST_IP=192.168.1.1
~~~
$ dmesg | grep netcon
[ 24.361611] netpoll: netconsole: local port 6665
[ 24.361764] netpoll: netconsole: local IPv4 address 0.0.0.0
[ 24.361893] netpoll: netconsole: interface 'enp1s2'
[ 24.362061] netpoll: netconsole: remote port
[ 24.362344] netpoll: netconsole: remote IPv4 address 192.168.1.1
[ 24.362635] netpoll: netconsole: remote ethernet address
ff:ff:ff:ff:ff:ff
[ 24.362909] netpoll: netconsole: no IP address for enp1s2, aborting
[ 24.363186] netconsole: cleaning up
~
This turns out to be a bare minimum, i.e.
# modprobe netconsole netconsole=@/enp1s2,@192.168.1.1/
but that is also squeeze breeze ...
~
$ cat /usr/lib/systemd/system/netconsole-poma.service
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole-poma
RemainAfterExit=yes
ExecStart=/sbin/modprobe netconsole
netconsole=@${SRC_IP}/${SRC_DEV},@${DST_IP}/
ExecStop=/sbin/modprobe -r netconsole
[Install]
WantedBy=multi-user.target
$ cat /etc/sysconfig/netconsole-poma
# This is the EnvironmentFile for the netconsole service. Starting this
# service enables the capture of dmesg output on a destination machine.
# Source IP address
SRC_IP=192.168.1.2
# Source network device
SRC_DEV=enp1s2
# Destination IP address
DST_IP=192.168.1.1
~~~
$ dmesg | grep netcon
[ 23.156730] netpoll: netconsole: local port 6665
[
Re: [systemd-devel] Netconsole NG
On Tue, Apr 8, 2014 at 2:10 PM, poma pomidorabelis...@gmail.com wrote:
On 08.04.2014 04:03, poma wrote:
On 07.04.2014 19:55, Zbigniew Jędrzejewski-Szmek wrote:
On Mon, Apr 07, 2014 at 05:34:10PM +0200, Lukáš Nykrýn wrote:
The reason why this was not rewritten a long time ago is that the
initscript tries to figure some of those values by itself (for
example the MAC address). But yes, we need to do something with
netconsole. It is a blocker for my initscripts evil plan.
Doesn't netconsole figure out most of those settings by itself, and
others default to sensible values, so if the network card is up
and has an address configured, only the device and target ip must be given?
Dne 6.4.2014 17:59, poma napsal(a):
/etc/sysconfig/netconsole:
# This is the EnvironmentFile for the netconsole service. Starting this
# service enables the capture of dmesg output on a destination machine.
# Source port
SRC_PORT=12345
This should default to empty... Kernel will pick something.
# Source IP address
SRC_IP=192.168.1.2
This should default to empty... Kernel will use configured address,
since we order after network.target anyway.
# Source network device
SRC_DEV=enp1s2
Maybe this can be made into a instance argument?
# Destination port
DST_PORT=12345
I think this should default to 514/syslog, and can be left unset.
# Destination IP address
DST_IP=192.168.1.1
# Destination ethernet address
DST_EHA=00:11:22:33:44:55
This should default to unset. The kernel will query it if not set.
/usr/lib/systemd/system/netconsole.service:
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole
This is Fedora/RH specific. But I don't know what the proper path should
be, so maybe this is OK for now.
Type=simple
This is the default... No need to specify.
RemainAfterExit=yes
ExecStart=/usr/sbin/modprobe netconsole
This should be /sbin/modprobe for compatibility with split root.
netconsole=${SRC_PORT}@${SRC_IP}/${SRC_DEV},${DST_PORT}@${DST_IP}/${DST_EHA}
ExecStop=/usr/sbin/modprobe -r netconsole
Ditto.
[Install]
WantedBy=multi-user.target
That's a really late... But I don't see a better place unfortunately.
The original SysV netconsole service with related config - still in use,
https://git.fedorahosted.org/cgit/initscripts.git/plain/rc.d/init.d/netconsole
https://git.fedorahosted.org/cgit/initscripts.git/plain/sysconfig/netconsole
Feel free to comment.
Looks like an improvement on status quo.
Zbyszek
Shall we still leave something for users to configure.
Thanks for your review.
$ cat /usr/lib/systemd/system/netconsole-zbyszek.service
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole-zbyszek
RemainAfterExit=yes
ExecStart=/sbin/modprobe netconsole netconsole=@/${SRC_DEV},@${DST_IP}/
ExecStop=/sbin/modprobe -r netconsole
[Install]
WantedBy=multi-user.target
~~~
$ cat /etc/sysconfig/netconsole-zbyszek
# This is the EnvironmentFile for the netconsole service. Starting this
# service enables the capture of dmesg output on a destination machine.
# Source network device
SRC_DEV=enp1s2
# Destination IP address
DST_IP=192.168.1.1
~~~
$ dmesg | grep netcon
[ 24.361611] netpoll: netconsole: local port 6665
[ 24.361764] netpoll: netconsole: local IPv4 address 0.0.0.0
[ 24.361893] netpoll: netconsole: interface 'enp1s2'
[ 24.362061] netpoll: netconsole: remote port
[ 24.362344] netpoll: netconsole: remote IPv4 address 192.168.1.1
[ 24.362635] netpoll: netconsole: remote ethernet address
ff:ff:ff:ff:ff:ff
[ 24.362909] netpoll: netconsole: no IP address for enp1s2, aborting
[ 24.363186] netconsole: cleaning up
~
This turns out to be a bare minimum, i.e.
# modprobe netconsole netconsole=@/enp1s2,@192.168.1.1/
but that is also squeeze breeze ...
~
$ cat /usr/lib/systemd/system/netconsole-poma.service
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole-poma
RemainAfterExit=yes
ExecStart=/sbin/modprobe netconsole
netconsole=@${SRC_IP}/${SRC_DEV},@${DST_IP}/
ExecStop=/sbin/modprobe -r netconsole
[Install]
WantedBy=multi-user.target
$ cat /etc/sysconfig/netconsole-poma
# This is the EnvironmentFile for the netconsole service. Starting this
# service enables the capture of dmesg output on a destination machine.
# Source IP address
SRC_IP=192.168.1.2
# Source network device
SRC_DEV=enp1s2
# Destination IP address
DST_IP=192.168.1.1
Re: [systemd-devel] Netconsole NG
On 04/08/2014 12:25 PM, Tom Gundersen wrote: This looks like a definitive improvement. I beg the differ that unit file created/provided is rubbish I even go so far as saying every line in the [Service] section is a sample of what not to do. Anyone reading this thread should stay away from duplicating what is being done in it. JBG ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] Netconsole NG
On 08.04.2014 14:25, Tom Gundersen wrote:
On Tue, Apr 8, 2014 at 2:10 PM, poma pomidorabelis...@gmail.com wrote:
On 08.04.2014 04:03, poma wrote:
On 07.04.2014 19:55, Zbigniew Jędrzejewski-Szmek wrote:
On Mon, Apr 07, 2014 at 05:34:10PM +0200, Lukáš Nykrýn wrote:
The reason why this was not rewritten a long time ago is that the
initscript tries to figure some of those values by itself (for
example the MAC address). But yes, we need to do something with
netconsole. It is a blocker for my initscripts evil plan.
Doesn't netconsole figure out most of those settings by itself, and
others default to sensible values, so if the network card is up
and has an address configured, only the device and target ip must be given?
Dne 6.4.2014 17:59, poma napsal(a):
/etc/sysconfig/netconsole:
# This is the EnvironmentFile for the netconsole service. Starting this
# service enables the capture of dmesg output on a destination machine.
# Source port
SRC_PORT=12345
This should default to empty... Kernel will pick something.
# Source IP address
SRC_IP=192.168.1.2
This should default to empty... Kernel will use configured address,
since we order after network.target anyway.
# Source network device
SRC_DEV=enp1s2
Maybe this can be made into a instance argument?
# Destination port
DST_PORT=12345
I think this should default to 514/syslog, and can be left unset.
# Destination IP address
DST_IP=192.168.1.1
# Destination ethernet address
DST_EHA=00:11:22:33:44:55
This should default to unset. The kernel will query it if not set.
/usr/lib/systemd/system/netconsole.service:
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole
This is Fedora/RH specific. But I don't know what the proper path should
be, so maybe this is OK for now.
Type=simple
This is the default... No need to specify.
RemainAfterExit=yes
ExecStart=/usr/sbin/modprobe netconsole
This should be /sbin/modprobe for compatibility with split root.
netconsole=${SRC_PORT}@${SRC_IP}/${SRC_DEV},${DST_PORT}@${DST_IP}/${DST_EHA}
ExecStop=/usr/sbin/modprobe -r netconsole
Ditto.
[Install]
WantedBy=multi-user.target
That's a really late... But I don't see a better place unfortunately.
The original SysV netconsole service with related config - still in use,
https://git.fedorahosted.org/cgit/initscripts.git/plain/rc.d/init.d/netconsole
https://git.fedorahosted.org/cgit/initscripts.git/plain/sysconfig/netconsole
Feel free to comment.
Looks like an improvement on status quo.
Zbyszek
Shall we still leave something for users to configure.
Thanks for your review.
$ cat /usr/lib/systemd/system/netconsole-zbyszek.service
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole-zbyszek
RemainAfterExit=yes
ExecStart=/sbin/modprobe netconsole netconsole=@/${SRC_DEV},@${DST_IP}/
ExecStop=/sbin/modprobe -r netconsole
[Install]
WantedBy=multi-user.target
~~~
$ cat /etc/sysconfig/netconsole-zbyszek
# This is the EnvironmentFile for the netconsole service. Starting this
# service enables the capture of dmesg output on a destination machine.
# Source network device
SRC_DEV=enp1s2
# Destination IP address
DST_IP=192.168.1.1
~~~
$ dmesg | grep netcon
[ 24.361611] netpoll: netconsole: local port 6665
[ 24.361764] netpoll: netconsole: local IPv4 address 0.0.0.0
[ 24.361893] netpoll: netconsole: interface 'enp1s2'
[ 24.362061] netpoll: netconsole: remote port
[ 24.362344] netpoll: netconsole: remote IPv4 address 192.168.1.1
[ 24.362635] netpoll: netconsole: remote ethernet address
ff:ff:ff:ff:ff:ff
[ 24.362909] netpoll: netconsole: no IP address for enp1s2, aborting
[ 24.363186] netconsole: cleaning up
~
This turns out to be a bare minimum, i.e.
# modprobe netconsole netconsole=@/enp1s2,@192.168.1.1/
but that is also squeeze breeze ...
~
$ cat /usr/lib/systemd/system/netconsole-poma.service
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole-poma
RemainAfterExit=yes
ExecStart=/sbin/modprobe netconsole
netconsole=@${SRC_IP}/${SRC_DEV},@${DST_IP}/
ExecStop=/sbin/modprobe -r netconsole
[Install]
WantedBy=multi-user.target
$ cat /etc/sysconfig/netconsole-poma
# This is the EnvironmentFile for the netconsole service. Starting this
# service enables the capture of dmesg output on a destination machine.
# Source IP address
SRC_IP=192.168.1.2
# Source network device
SRC_DEV=enp1s2
#
Re: [systemd-devel] Netconsole NG
On 08.04.2014 18:21, Jóhann B. Guðmundsson wrote:
On 04/08/2014 12:10 PM, poma wrote:
[Service]
EnvironmentFile=/etc/sysconfig/netconsole-zbyszek
RemainAfterExit=yes
ExecStart=/sbin/modprobe netconsole netconsole=@/${SRC_DEV},@${DST_IP}/
ExecStop=/sbin/modprobe -r netconsole
On popular demand of me providing more detailed criticism than just
this is rubbish as well as I got somewhat myself to blame for poorly
written unit files given that the best practical of unit writing resides
in my head by the experience of migrating so many legacy sysv initscript
to native systemd units and driven half way to insanity while doing so.
So let me clarify why I think this is rubbish.
For the first you are using the wrong Type for that unit file as in the
build in default which is Type=simple for the purpose of this unit along
with RemainAfterExit=yes in it when you should be using Type=oneshot unit
Secondly let me start with EnvironmentFile= in 99.9% times this is
entirely unnecessary since what is contains within those environment
files are configuration changes to daemon startup for daemons that are
so poorly written they dont support reading configuration files on startup.
Now on the 21 century within the systemd universe, administrators are (
supposted to be ) using drop in configuration snippets that contain that
administrator overwrite to overcome that daemons lack of reading
configuration file in the relvant unit's .d configuration directory that
resides under /etc/systemd/systemd/ or better yet developers that
maintain and own that component should be rewriting it's daemon to
support parsing configuration file(s) at startup.
If you happen to be using the 00.1% components that actually has valid
usecase for using EnvironmentFile= definition in type service units
these days, then those environment files should reside in a components
.d directory under /etc to make them cross distributional not under
/etc/sysconfig or under /etc/default and hopefully one day I will have
manage to remove all traces and usages of environmental files in
/etc/sysconfig in Fedora ( but achieving that is more like David vs
Goliath or Jóhann vs Red Hat.) as well as others doing the same in their
distribution of choice
Thirdly under no circumstances and I mean NEVER should you be loading
and unloading modules from within a systemd unit YES NEVER!!!
If you need for one reason or another to load module you do so by
placing .conf configuration snippet in /etc/modules-load.d which tell
the system which kernel modules to load but fact is if you actually need
to load some module manually like this something is wrong since modules
should be automatic loaded by PCI IDs, USB IDs, DMI IDs or similar
triggers encoded in the kernel modules themselves these days.
And you place .conf configuration snippet in /etc/modprobe.d which
contains which parameters the kernel module uses when loading.
Which leads to that service section being rubbish as well as the
existence of that entire unit being o_O since the correct way ( always )
when dealing with module and their option is what I described here above
which leads to for netconsole being
/etc/modules-load.d/netconsole.conf
# Load netconsole.ko at boot
netconsole
And
/etc/modprobe.d/netconsole.conf
# load netconsole options
options netconsole netconsole=@192.168.1.2/enp1s2,@192.168.1.1/
And since you are using netconsole you probably want to increase the
logvel as well
/etc/sysctl.d/10-netconsole.conf
#raising loglevel from 7 to 8
kernel.printk = 8 4 1 7
JBG
What do you mean? African or European swallow?
poma
___
systemd-devel mailing list
systemd-devel@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] Netconsole NG
On 08.04.2014 23:45, Jóhann B. Guðmundsson wrote: On 04/08/2014 09:27 PM, poma wrote: In fact, this method has long been known from the Lm_sensors - Linux hardware monitoring It's a well known fact that the internet is good at spreading ignorance and what you just provided was an example of more people doing it wrong which does not make it right. You can see the same pattern when people cut and paste code left and right to cut corners. JBG How do you know so much about swallows? poma ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] Netconsole NG
On 08.04.2014 23:27, poma wrote:
On 08.04.2014 14:25, Tom Gundersen wrote:
On Tue, Apr 8, 2014 at 2:10 PM, poma pomidorabelis...@gmail.com wrote:
On 08.04.2014 04:03, poma wrote:
On 07.04.2014 19:55, Zbigniew Jędrzejewski-Szmek wrote:
On Mon, Apr 07, 2014 at 05:34:10PM +0200, Lukáš Nykrýn wrote:
The reason why this was not rewritten a long time ago is that the
initscript tries to figure some of those values by itself (for
example the MAC address). But yes, we need to do something with
netconsole. It is a blocker for my initscripts evil plan.
Doesn't netconsole figure out most of those settings by itself, and
others default to sensible values, so if the network card is up
and has an address configured, only the device and target ip must be
given?
Dne 6.4.2014 17:59, poma napsal(a):
/etc/sysconfig/netconsole:
# This is the EnvironmentFile for the netconsole service. Starting this
# service enables the capture of dmesg output on a destination machine.
# Source port
SRC_PORT=12345
This should default to empty... Kernel will pick something.
# Source IP address
SRC_IP=192.168.1.2
This should default to empty... Kernel will use configured address,
since we order after network.target anyway.
# Source network device
SRC_DEV=enp1s2
Maybe this can be made into a instance argument?
# Destination port
DST_PORT=12345
I think this should default to 514/syslog, and can be left unset.
# Destination IP address
DST_IP=192.168.1.1
# Destination ethernet address
DST_EHA=00:11:22:33:44:55
This should default to unset. The kernel will query it if not set.
/usr/lib/systemd/system/netconsole.service:
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole
This is Fedora/RH specific. But I don't know what the proper path should
be, so maybe this is OK for now.
Type=simple
This is the default... No need to specify.
RemainAfterExit=yes
ExecStart=/usr/sbin/modprobe netconsole
This should be /sbin/modprobe for compatibility with split root.
netconsole=${SRC_PORT}@${SRC_IP}/${SRC_DEV},${DST_PORT}@${DST_IP}/${DST_EHA}
ExecStop=/usr/sbin/modprobe -r netconsole
Ditto.
[Install]
WantedBy=multi-user.target
That's a really late... But I don't see a better place unfortunately.
The original SysV netconsole service with related config - still in use,
https://git.fedorahosted.org/cgit/initscripts.git/plain/rc.d/init.d/netconsole
https://git.fedorahosted.org/cgit/initscripts.git/plain/sysconfig/netconsole
Feel free to comment.
Looks like an improvement on status quo.
Zbyszek
Shall we still leave something for users to configure.
Thanks for your review.
$ cat /usr/lib/systemd/system/netconsole-zbyszek.service
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole-zbyszek
RemainAfterExit=yes
ExecStart=/sbin/modprobe netconsole netconsole=@/${SRC_DEV},@${DST_IP}/
ExecStop=/sbin/modprobe -r netconsole
[Install]
WantedBy=multi-user.target
~~~
$ cat /etc/sysconfig/netconsole-zbyszek
# This is the EnvironmentFile for the netconsole service. Starting this
# service enables the capture of dmesg output on a destination machine.
# Source network device
SRC_DEV=enp1s2
# Destination IP address
DST_IP=192.168.1.1
~~~
$ dmesg | grep netcon
[ 24.361611] netpoll: netconsole: local port 6665
[ 24.361764] netpoll: netconsole: local IPv4 address 0.0.0.0
[ 24.361893] netpoll: netconsole: interface 'enp1s2'
[ 24.362061] netpoll: netconsole: remote port
[ 24.362344] netpoll: netconsole: remote IPv4 address 192.168.1.1
[ 24.362635] netpoll: netconsole: remote ethernet address
ff:ff:ff:ff:ff:ff
[ 24.362909] netpoll: netconsole: no IP address for enp1s2, aborting
[ 24.363186] netconsole: cleaning up
~
This turns out to be a bare minimum, i.e.
# modprobe netconsole netconsole=@/enp1s2,@192.168.1.1/
but that is also squeeze breeze ...
~
$ cat /usr/lib/systemd/system/netconsole-poma.service
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole-poma
RemainAfterExit=yes
ExecStart=/sbin/modprobe netconsole
netconsole=@${SRC_IP}/${SRC_DEV},@${DST_IP}/
ExecStop=/sbin/modprobe -r netconsole
[Install]
WantedBy=multi-user.target
$ cat /etc/sysconfig/netconsole-poma
# This is the EnvironmentFile for the netconsole service. Starting this
# service enables the capture of dmesg output on a destination machine.
# Source IP address
SRC_IP=192.168.1.2
# Source network
Re: [systemd-devel] Netconsole NG
On 04/08/2014 09:53 PM, poma wrote: How do you know so much about swallows? Given that you respond in random unrelated quotes on threads and reports then perhaps it's best that people start replying to you in same manner since it seems to be your preferred way of communication. JBG ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] Netconsole NG
On 09.04.2014 00:21, Jóhann B. Guðmundsson wrote: On 04/08/2014 09:53 PM, poma wrote: How do you know so much about swallows? Given that you respond in random unrelated quotes on threads and reports then perhaps it's best that people start replying to you in same manner since it seems to be your preferred way of communication. JBG What? A swallow carrying a coconut? poma ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] Netconsole NG
Dne 6.4.2014 17:59, poma napsal(a):
/etc/sysconfig/netconsole:
# This is the EnvironmentFile for the netconsole service. Starting this
# service enables the capture of dmesg output on a destination machine.
# Source port
SRC_PORT=12345
# Source IP address
SRC_IP=192.168.1.2
# Source network device
SRC_DEV=enp1s2
# Destination port
DST_PORT=12345
# Destination IP address
DST_IP=192.168.1.1
# Destination ethernet address
DST_EHA=00:11:22:33:44:55
/usr/lib/systemd/system/netconsole.service:
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole
Type=simple
RemainAfterExit=yes
ExecStart=/usr/sbin/modprobe netconsole
netconsole=${SRC_PORT}@${SRC_IP}/${SRC_DEV},${DST_PORT}@${DST_IP}/${DST_EHA}
ExecStop=/usr/sbin/modprobe -r netconsole
[Install]
WantedBy=multi-user.target
The original SysV netconsole service with related config - still in use,
https://git.fedorahosted.org/cgit/initscripts.git/plain/rc.d/init.d/netconsole
https://git.fedorahosted.org/cgit/initscripts.git/plain/sysconfig/netconsole
Feel free to comment.
poma
The reason why this was not rewritten a long time ago is that the
initscript tries to figure some of those values by itself (for example
the MAC address). But yes, we need to do something with netconsole. It
is a blocker for my initscripts evil plan.
Lukas
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Re: [systemd-devel] Netconsole NG
On Mon, Apr 07, 2014 at 05:34:10PM +0200, Lukáš Nykrýn wrote:
The reason why this was not rewritten a long time ago is that the
initscript tries to figure some of those values by itself (for
example the MAC address). But yes, we need to do something with
netconsole. It is a blocker for my initscripts evil plan.
Doesn't netconsole figure out most of those settings by itself, and
others default to sensible values, so if the network card is up
and has an address configured, only the device and target ip must be given?
Dne 6.4.2014 17:59, poma napsal(a):
/etc/sysconfig/netconsole:
# This is the EnvironmentFile for the netconsole service. Starting this
# service enables the capture of dmesg output on a destination machine.
# Source port
SRC_PORT=12345
This should default to empty... Kernel will pick something.
# Source IP address
SRC_IP=192.168.1.2
This should default to empty... Kernel will use configured address,
since we order after network.target anyway.
# Source network device
SRC_DEV=enp1s2
Maybe this can be made into a instance argument?
# Destination port
DST_PORT=12345
I think this should default to 514/syslog, and can be left unset.
# Destination IP address
DST_IP=192.168.1.1
# Destination ethernet address
DST_EHA=00:11:22:33:44:55
This should default to unset. The kernel will query it if not set.
/usr/lib/systemd/system/netconsole.service:
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole
This is Fedora/RH specific. But I don't know what the proper path should
be, so maybe this is OK for now.
Type=simple
This is the default... No need to specify.
RemainAfterExit=yes
ExecStart=/usr/sbin/modprobe netconsole
This should be /sbin/modprobe for compatibility with split root.
netconsole=${SRC_PORT}@${SRC_IP}/${SRC_DEV},${DST_PORT}@${DST_IP}/${DST_EHA}
ExecStop=/usr/sbin/modprobe -r netconsole
Ditto.
[Install]
WantedBy=multi-user.target
That's a really late... But I don't see a better place unfortunately.
The original SysV netconsole service with related config - still in use,
https://git.fedorahosted.org/cgit/initscripts.git/plain/rc.d/init.d/netconsole
https://git.fedorahosted.org/cgit/initscripts.git/plain/sysconfig/netconsole
Feel free to comment.
Looks like an improvement on status quo.
Zbyszek
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Re: [systemd-devel] Netconsole NG
On 07.04.2014 17:34, Lukáš Nykrýn wrote:
Dne 6.4.2014 17:59, poma napsal(a):
/etc/sysconfig/netconsole:
# This is the EnvironmentFile for the netconsole service. Starting this
# service enables the capture of dmesg output on a destination machine.
# Source port
SRC_PORT=12345
# Source IP address
SRC_IP=192.168.1.2
# Source network device
SRC_DEV=enp1s2
# Destination port
DST_PORT=12345
# Destination IP address
DST_IP=192.168.1.1
# Destination ethernet address
DST_EHA=00:11:22:33:44:55
/usr/lib/systemd/system/netconsole.service:
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole
Type=simple
RemainAfterExit=yes
ExecStart=/usr/sbin/modprobe netconsole
netconsole=${SRC_PORT}@${SRC_IP}/${SRC_DEV},${DST_PORT}@${DST_IP}/${DST_EHA}
ExecStop=/usr/sbin/modprobe -r netconsole
[Install]
WantedBy=multi-user.target
The original SysV netconsole service with related config - still in use,
https://git.fedorahosted.org/cgit/initscripts.git/plain/rc.d/init.d/netconsole
https://git.fedorahosted.org/cgit/initscripts.git/plain/sysconfig/netconsole
Feel free to comment.
poma
The reason why this was not rewritten a long time ago is that the
initscript tries to figure some of those values by itself (for example
the MAC address). But yes, we need to do something with netconsole. It
is a blocker for my initscripts evil plan.
Lukas
Yeehaw!
poma
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Re: [systemd-devel] Netconsole NG
On 07.04.2014 19:55, Zbigniew Jędrzejewski-Szmek wrote:
On Mon, Apr 07, 2014 at 05:34:10PM +0200, Lukáš Nykrýn wrote:
The reason why this was not rewritten a long time ago is that the
initscript tries to figure some of those values by itself (for
example the MAC address). But yes, we need to do something with
netconsole. It is a blocker for my initscripts evil plan.
Doesn't netconsole figure out most of those settings by itself, and
others default to sensible values, so if the network card is up
and has an address configured, only the device and target ip must be given?
Dne 6.4.2014 17:59, poma napsal(a):
/etc/sysconfig/netconsole:
# This is the EnvironmentFile for the netconsole service. Starting this
# service enables the capture of dmesg output on a destination machine.
# Source port
SRC_PORT=12345
This should default to empty... Kernel will pick something.
# Source IP address
SRC_IP=192.168.1.2
This should default to empty... Kernel will use configured address,
since we order after network.target anyway.
# Source network device
SRC_DEV=enp1s2
Maybe this can be made into a instance argument?
# Destination port
DST_PORT=12345
I think this should default to 514/syslog, and can be left unset.
# Destination IP address
DST_IP=192.168.1.1
# Destination ethernet address
DST_EHA=00:11:22:33:44:55
This should default to unset. The kernel will query it if not set.
/usr/lib/systemd/system/netconsole.service:
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole
This is Fedora/RH specific. But I don't know what the proper path should
be, so maybe this is OK for now.
Type=simple
This is the default... No need to specify.
RemainAfterExit=yes
ExecStart=/usr/sbin/modprobe netconsole
This should be /sbin/modprobe for compatibility with split root.
netconsole=${SRC_PORT}@${SRC_IP}/${SRC_DEV},${DST_PORT}@${DST_IP}/${DST_EHA}
ExecStop=/usr/sbin/modprobe -r netconsole
Ditto.
[Install]
WantedBy=multi-user.target
That's a really late... But I don't see a better place unfortunately.
The original SysV netconsole service with related config - still in use,
https://git.fedorahosted.org/cgit/initscripts.git/plain/rc.d/init.d/netconsole
https://git.fedorahosted.org/cgit/initscripts.git/plain/sysconfig/netconsole
Feel free to comment.
Looks like an improvement on status quo.
Zbyszek
Shall we still leave something for users to configure.
Thanks for your review.
poma
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[systemd-devel] Netconsole NG
/etc/sysconfig/netconsole:
# This is the EnvironmentFile for the netconsole service. Starting this
# service enables the capture of dmesg output on a destination machine.
# Source port
SRC_PORT=12345
# Source IP address
SRC_IP=192.168.1.2
# Source network device
SRC_DEV=enp1s2
# Destination port
DST_PORT=12345
# Destination IP address
DST_IP=192.168.1.1
# Destination ethernet address
DST_EHA=00:11:22:33:44:55
/usr/lib/systemd/system/netconsole.service:
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole
Type=simple
RemainAfterExit=yes
ExecStart=/usr/sbin/modprobe netconsole
netconsole=${SRC_PORT}@${SRC_IP}/${SRC_DEV},${DST_PORT}@${DST_IP}/${DST_EHA}
ExecStop=/usr/sbin/modprobe -r netconsole
[Install]
WantedBy=multi-user.target
The original SysV netconsole service with related config - still in use,
https://git.fedorahosted.org/cgit/initscripts.git/plain/rc.d/init.d/netconsole
https://git.fedorahosted.org/cgit/initscripts.git/plain/sysconfig/netconsole
Feel free to comment.
poma
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Re: [systemd-devel] Netconsole NG
El 06/04/14 12:59, poma escribió:
/usr/lib/systemd/system/netconsole.service:
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole
Type=simple
RemainAfterExit=yes
ExecStart=/usr/sbin/modprobe netconsole
netconsole=${SRC_PORT}@${SRC_IP}/${SRC_DEV},${DST_PORT}@${DST_IP}/${DST_EHA}
ExecStop=/usr/sbin/modprobe -r netconsole
[Install]
WantedBy=multi-user.target
The original SysV netconsole service with related config - still in use,
https://git.fedorahosted.org/cgit/initscripts.git/plain/rc.d/init.d/netconsole
https://git.fedorahosted.org/cgit/initscripts.git/plain/sysconfig/netconsole
Feel free to comment.
Do not call modprobe from unit files, use a modules-load.d snippet instead.
Hrmm.. a systemd-netconsole.service that could setup this is a clean
race-free fashion will be a cool addition to the stack ;)
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Re: [systemd-devel] Netconsole NG
On 06.04.2014 18:42, Cristian Rodríguez wrote:
El 06/04/14 12:59, poma escribió:
/usr/lib/systemd/system/netconsole.service:
[Unit]
Description=Adds the netconsole module with the configured parameters
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/netconsole
Type=simple
RemainAfterExit=yes
ExecStart=/usr/sbin/modprobe netconsole
netconsole=${SRC_PORT}@${SRC_IP}/${SRC_DEV},${DST_PORT}@${DST_IP}/${DST_EHA}
ExecStop=/usr/sbin/modprobe -r netconsole
[Install]
WantedBy=multi-user.target
The original SysV netconsole service with related config - still in use,
https://git.fedorahosted.org/cgit/initscripts.git/plain/rc.d/init.d/netconsole
https://git.fedorahosted.org/cgit/initscripts.git/plain/sysconfig/netconsole
Feel free to comment.
Do not call modprobe from unit files, use a modules-load.d snippet instead.
Netconsole ain't module vulgaris.
Snippet, yeah right.
Hrmm.. a systemd-netconsole.service that could setup this is a clean
race-free fashion will be a cool addition to the stack ;)
Say whaaat?
poma
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Re: [systemd-devel] Netconsole NG
El 06/04/14 13:42, Cristian Rodríguez escribió:
Hrmm.. a systemd-netconsole.service that could setup this is a clean
race-free fashion will be a cool addition to the stack ;)
The question is.. as a separate tool or an extension to networkd, which
seems to be a more suitable place..
NetConsole=true
enable netconsole on this interface , networkd can then fill up at least
${SRC_IP} ${SRC_DEV} ..other unit directives will be needed for
information that networkd does not have..
This hypothetical feature sounds significantly better than the current
hackish way...
--
Cristian
Team PITA
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Re: [systemd-devel] Netconsole NG
On 06.04.2014 19:40, Cristian Rodríguez wrote:
El 06/04/14 13:42, Cristian Rodríguez escribió:
Hrmm.. a systemd-netconsole.service that could setup this is a clean
race-free fashion will be a cool addition to the stack ;)
The question is.. as a separate tool or an extension to networkd, which
seems to be a more suitable place..
NetConsole=true
enable netconsole on this interface , networkd can then fill up at least
${SRC_IP} ${SRC_DEV} ..other unit directives will be needed for
information that networkd does not have..
This hypothetical feature sounds significantly better than the current
hackish way...
Yeah, but compared with your hypothetical and with the old style Kung Fu
netcon servo practically broken within the grand systemd schema,
/etc/init.d/netconsole
netpoll: netconsole: local port 12345
netpoll: netconsole: local IPv4 address 0.0.0.0
netpoll: netconsole: interface 'enp1s2'
netpoll: netconsole: remote port 12345
netpoll: netconsole: remote IPv4 address 192.168.1.1
netpoll: netconsole: remote ethernet address 00:11:22:33:44:55
netpoll: netconsole: device enp1s2 not up yet, forcing it
netpoll: netconsole: no IP address for enp1s2, aborting
netconsole: cleaning up
Netconsole NG is simple as it can be, and most importantly works in all
conditions,
/usr/lib/systemd/system/netconsole.service
netpoll: netconsole: local port 12345
netpoll: netconsole: local IPv4 address 192.168.1.2
netpoll: netconsole: interface 'enp1s2'
netpoll: netconsole: remote port 12345
netpoll: netconsole: remote IPv4 address 192.168.1.1
netpoll: netconsole: remote ethernet address 00:11:22:33:44:55
console [netcon0] enabled
netconsole: network logging started
netpoll: netconsole: local port 12345
netpoll: netconsole: local IPv4 address 192.168.1.2
netpoll: netconsole: interface 'enp1s2'
netpoll: netconsole: remote port 12345
netpoll: netconsole: remote IPv4 address 192.168.1.1
netpoll: netconsole: remote ethernet address 00:11:22:33:44:55
netpoll: netconsole: device enp1s2 not up yet, forcing it
console [netcon0] enabled
netconsole: network logging started
Now you can pursue the beauty of design. :)
poma
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