The issue was with password-less ssh. I figured out the problem. It had to do with specifying the key to use for ssh to netdump server in ~/.ssh/config file. #pwd /root/.ssh # cat config IdentityFile ~/.ssh/id_rsa.us1 # service kdump start No kdump initial ramdisk found. [WARNING] Rebuilding /boot/initrd-2.6.18-128.el5kdump.img Starting kdump: [ OK ] I also tested using your procedure to manually crash the server and it worked; could see a 48G vmcore file created on the netdump server. Thanks for your help. On Fri, Jul 29, 2011 at 7:25 PM, Tanweer Noor <tanweer.noor@xxxxxxxxx>wrote: > did you reboot system? if not, please do so. then check whether the system > is already generating a vmcore. Look on the console (either at the machine > directly, or through a kvm or serial console interface). If kdump is > already > running, just wait for it to finish. > If kdump is not running, you can start it by pressing Alt + SysRq > (PrintScreen) + C. This will instruct the kernel to panic and generate a > vmcore. > > > On Fri, Jul 29, 2011 at 4:10 PM, unix syzadmin <unixsyzadmin@xxxxxxxxx > >wrote: > > > Thanks, > > > > I initiated the kernel panic as you suggested; I get this on the console. > > > > SysRq : Trigger a crashdump > > Kexec: Warning: crash image not loaded > > Kernel panic - not syncing: SysRq-triggered panic! > > > > > > On Fri, Jul 29, 2011 at 5:34 PM, Tanweer Noor <tanweer.noor@xxxxxxxxx > > >wrote: > > > > > >> Add Boot Parameters > > > > > > add below line under /etc/grub.conf > > > > > > kernel /boot/vmlinuz-2.6.17-1.2519.4.21.el5 ro root=LABEL=/ rhgb quiet > > > crashkernel=128M@16M > > > > > > > > > open /etc/kdump.conf and uncomment dump location to /var/crash/ > > > > > > then run below:- > > > > > > # chkconfig kdump on > > > # service kdump start > > > > > > > > > Warning: This will panic your kernel, killing all services on the > machine > > > > > > # echo 1 > /proc/sys/kernel/sysrq > > > # echo "c" > /proc/sysrq-trigger > > > > > > if it does not dump core then run below > > > > > > service kdump start > > > > > > > > > > > > On Fri, Jul 29, 2011 at 2:24 PM, unix syzadmin <unixsyzadmin@xxxxxxxxx > > > >wrote: > > > > > > > Hi > > > > > > > > I am having issues configuring kdump on my linux server. > > > > > > > > # service kdump start > > > > No kdump initial ramdisk found. [WARNING] > > > > Rebuilding /boot/initrd-2.6.18-128.el5kdump.img > > > > /etc/kdump.conf: Could not create user1@server1:/var/crash, you > > probably > > > > need to run "service kdump propagate" > > > > Failed to run mkdumprd > > > > > > > > how did I configure kdump? > > > > ==================== > > > > # grep crashkernel /boot/grub/grub.conf > > > > kernel /vmlinuz-2.6.18-128.el5 ro root=/dev/sysvg/root.fs > nohpet > > > > nopmtimer powernow-k8.tscsync=1 crashkernel=128M@16M > > > > > > > > # grep net /etc/kdump.conf > > > > net user1@server1 > > > > > > > > The root user on this server is able to ssh to user1@server1 without > > > > password; tested this to be working with the following command line: > > > > > > > > #ssh -i /root/.ssh/id_rsa.us1 user1@server1 > > > > > > > > > > > > Any suggestions or pointers is appreciated. > > > > Thanks. > > > > -- > > > > redhat-list mailing list > > > > unsubscribe mailto:redhat-list-request@xxxxxxxxxx > ?subject=unsubscribe > > > > https://www.redhat.com/mailman/listinfo/redhat-list > > > > > > > > > > > > > > > > -- > > > ~ Tanweer > > > ---- > > > -- > > > redhat-list mailing list > > > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > > > https://www.redhat.com/mailman/listinfo/redhat-list > > > > > -- > > redhat-list mailing list > > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > > https://www.redhat.com/mailman/listinfo/redhat-list > > > > > > -- > ~ Tanweer > ---- > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list > -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
