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#Install Fedora on your machine
#Install Fedora on your machine
#After system installed, check if kexec-tools kernel-debuginfo and crash is installed via <pre>rpm -q kexec-tools kernel-debuginfo crash</pre>Or via yum <pre>yum install kexec-tools kernel-debuginfo crash</pre>
#After system installed, check if kexec-tools kernel-debuginfo and crash is installed via <pre>rpm -q kexec-tools kernel-debuginfo crash</pre>Or via yum <pre>yum install kexec-tools kernel-debuginfo crash</pre>
#Reserve crashkernel for kdump by grubby<pre>rubby --args="crashkernl=128M" --update-kernel=$(grubby --default-kernel)</pre>Reboot system and check /proc/cmdline <pre>cat /proc/cmdline | grep "crashkernel"</pre>
#Reserve crashkernel for kdump by grubby<pre>grubby --args="crashkernl=128M" --update-kernel=$(grubby --default-kernel)</pre>Reboot system and check /proc/cmdline <pre>cat /proc/cmdline | grep "crashkernel"</pre>
#Edit /etc/kdump.conf, add this line:
#Edit /etc/kdump.conf, add this line:<pre>net my.server.com:/mnt/testarea/nfs</pre><pre>core_collector makedumpfile -c -d 31</pre>
    :<pre>   net my.server.com:/mnt/testarea/nfs
#Apply changes and start kdump via <pre>service kdump restart</pre>
    core_collector makedumpfile -c -d 31</pre>
#Apply changes and start kdump via <pre>ervice kdump restart</pre>


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Latest revision as of 03:32, 26 March 2012

Description

Setup

  1. Prepare a NFS server, edit /etc/exports, append this line:
    /mnt/testarea/nfs *(rw,no_root_squash,sync)
    Restart NFS service:
     service nfs restart
  2. Install Fedora on your machine
  3. After system installed, check if kexec-tools kernel-debuginfo and crash is installed via 
    rpm -q kexec-tools kernel-debuginfo crash
    Or via yum 
    yum install kexec-tools kernel-debuginfo crash
  4. Reserve crashkernel for kdump by grubby
    grubby --args="crashkernl=128M" --update-kernel=$(grubby --default-kernel)
    Reboot system and check /proc/cmdline 
    cat /proc/cmdline | grep "crashkernel"
  5. Edit /etc/kdump.conf, add this line:
    net my.server.com:/mnt/testarea/nfs
    core_collector makedumpfile -c -d 31
  6. Apply changes and start kdump via 
    service kdump restart

How to test

  1. Trigger crash via:
    echo c > /proc/sysrq-trigger
  2. Use crash to analyse vmcore:
        mount -t nfs my.server.com:/mnt/testarea/nfs /var/crash/
        crash -i crash-simple.cmd /usr/lib/debug/lib/modules/xxx/vmlinux /var/crash/xxx/vmcore
        crash -i crash.cmd /usr/lib/debug/lib/modules/xxx/vmlinux /var/crash/xxx/vmcore

Expected Results

  1. Dump process could be monitered if console is connected
  2. System reboot successfully after dump vmcore finshed
  3. vmcore was found on NFS server
  4. No warning or error should be should found on crash output
Retrieved from "https://fedoraproject.org/w/index.php?title=QA:Testcase_Kdump_Func_NFS&oldid=280101"