Messages in this thread | | | Date | Thu, 16 Dec 2004 10:55:22 -0800 | From | Matt Mackall <> | Subject | Re: Issue on netconsole vs. Linux kernel oops |
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On Thu, Dec 16, 2004 at 10:48:27AM -0800, Park Lee wrote: > Hi, > I'd like to use netconsole to send local Linux > kernel's final messages (i.e. oops) to remote machine > when the kernel crashes. > Now I can successfully use a built-in netconsole to > send some loacl kernel messages to the remote machine. > (the parameter I send to local kernel on kernel > command line is > "netconsole=@192.168.0.2/,514@192.168.0.1/", I run > syslogd in remote machine). For example, When the > local kernel is booting, it will send a message > "192.168.0.2 audit(1103247021.091:0): initialized" to > remote machine through netconsole, and the syslogd on > remote machine will write the message to > /var/log/messages on remote machine. > What CONFUSE me most is that when the kernel > crashes, there is NO message (oops) about the crash > being wrote down by syslogd on remote machine to > remote /var/log/messages file at all!! > But in the mean time, We can see the outputs of > tcpdump on the remote machine, they are some thing > like the following: > > 01:36:56.692877 IP 192.168.0.2.6665 > > 192.168.0.1.syslog: UDP, length 48 > 01:36:56.692930 IP 192.168.0.2.6665 > > 192.168.0.1.syslog: UDP, length 29 > 01:36:56.692982 IP 192.168.0.2.6665 > > 192.168.0.1.syslog: UDP, length 15 > 01:36:56.693034 IP 192.168.0.2.6665 > > 192.168.0.1.syslog: UDP, length 9 > 01:36:56.693086 IP 192.168.0.2.6665 > > 192.168.0.1.syslog: UDP, length 16 > 01:36:56.693121 IP 192.168.0.2.6665 > > 192.168.0.1.syslog: UDP, length 16 > ... ... > > From these messages, we can see that the netconsole > actually have sent the final messages (oops) to remote > machine when the local kernel crashed. But there are > no corresponding messages recorded by syslogd on > remote machine to /var/log/messages.
From your description, it sounds like syslogd is at fault. Try using netcat on the remote machine.
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