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Netconsole
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Netconsole with UDP
- Configure netconsole for 2.4 redhat kernel (redhat 9.0)
- 1) build the 2.4 redhat kernel with netconsole patch (in rh-2.4 series), make sure build with NETCONSOLE option.
* 2) bootup the netconsole machine with this kernel, make sure netdump rpm is installed in this machine.
* 3) edit /etc/sysconfig/netdump of this machine just like
* LOCALPORT=6666
* DEV=eth0
* NETDUMPADDR=192.168.1.223 #remote server machine (host)
* NETDUMPPORT=6666
* NETDUMPMACADDR=00:08:74:96:6D:9B #remote server eth address
* IDLETIMEOUT=100
* 4) add a user accout named netdump in your host machine, then start netdump service in that netconsole machine.
* 5) netconsole has been setup.
* Configure netconsole in 2.6 kernel
* 1) add this line "netconsole=[src-port]@[src-ip]/[<dev>],[tgt-port]@<tgt-ip>/[tgt-macaddr]" in your boot command line.
* 2) bootup the netconsole machine.
* 3) 2.6 netconsole has been setup.
* Configure conman over netconsole, download conman from ftp://www.clusterfs.com/pub/conman
* 1) edit your /etc/conman.conf, make sure you have set SERVER logdir, SERVER logfile, SERVER port,
* add following line in /etc/conman.conf
* NETCONSOLE name="netconsole" dev="client1_ip_address:client1_port" (clientX is netconsole machine)
* NETCONSOLE1 name="netconsole" dev="client2_ip_address:client2_port"
* ............
* 2) start conmand server conmand
* 3) start conman netconsole with conman -d conmand_server_ip:conmand_server_port NETCONSOLEx
* 4) Input sysrq command (& + S + sysrq_command) over conman netconsole, you will get the result in conman netconsole
There is a netconsole patch available that supports kernel level network logging over UDP. More information and a link to the kernel patches can be found at: [1].
- LinuxDebugging
