** Changed in: makedumpfile (Ubuntu Xenial) Importance: Undecided => High
** Description changed: + [SRU justification] + HOSTTAG=ip is unusable without this fix on some platforms + + [Impact] + HOSTTAG functionality works as expected. + + [Fix] + Loop on hostname -I for five seconds. Revert to HOSTTAG=hostname if IP address not found. + + [Test Case] + The race condition is difficult to run into but the bug reporter has been able to confirm the change from a PPA (see comment #5). + + [Regression] + Minimal, as the code path is only enhanced by one loop. Exit path remains the same. + + [Original description of the problem] + == Comment: #0 - PAVITHRA R. PRAKASH - 2016-06-30 07:12:40 == ---Problem Description--- During kdump over ssh IP prefix will be present only in first dump, subsequent dumps will not have IP in directory name. ---Steps to Reproduce--- 1) apt-get install linux-crashdump 2) increase crashdump size: sudo vim /etc/default/grub.d/kexec-tools.cfg GRUB_CMDLINE_LINUX_DEFAULT="$GRUB_CMDLINE_LINUX_DEFAULT crashkernel=2G- 4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M 3) sudo update-grub ; reboot the machine 4) sudo sed -i 's/USE_KDUMP=0/USE_KDUMP=1/g' /etc/default/kdump-tools 5) kdump-config show # should show "ready to dump" 6) ssh-keygen -t rsa 7) Edit below parameters in /etc/default/kdump-tools SSH="root@<server IP>" SSH_KEY=/root/.ssh/id_rsa 8) kdump-config propagate 9) kdump-config show 10) reboot 11) echo "c" > /proc/sysrq-trigger 12) verify dump is created in ssh server. 13) trigger the crash again. Logs ===== root@ubuntu:/home/ubuntu# uname -a Linux ubuntu 4.4.0-26-generic #45-Ubuntu SMP Mon Jun 20 17:27:01 UTC 2016 ppc64le ppc64le ppc64le GNU/Linux dumps on ssh server when 3 crashes are triggered ------------------------------------------------------------------------ [root@ltc-fire5 crash]# ls 192.168.122.25-201606300523 [root@ltc-fire5 crash]# ls 192.168.122.25-201606300523 -201606300524 [root@ltc-fire5 crash]# ls 192.168.122.25-201606300523 -201606300524 -201606300525 [root@ltc-fire5 crash]# cd -201606300524 -bash: cd: -2: invalid option cd: usage: cd [-L|[-P [-e]]] [dir] [root@ltc-fire5 crash]# cd -- -201606300524 [root@ltc-fire5 -201606300524]# ls dmesg.201606300524 dump.201606300524 - == Comment: #8 - Kevin W. Rudd - 2016-07-05 18:23:01 == Canonical, The behavior appears to be somewhat intermittent, and it looks as if define_stampdir() might be getting called before the network init has completed. If delaying this function is not practical, it might be helpful to have define_stampdir() fall back to using just "hostname" if "hostname -I" doesn't return any useful information for setting THIS_HOST. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to makedumpfile in Ubuntu. https://bugs.launchpad.net/bugs/1599561 Title: Ubuntu 16.04.01 kdump: IP prefix is missing in the directory name after first dump during kdump over ssh. Status in makedumpfile package in Ubuntu: Fix Released Status in makedumpfile source package in Xenial: In Progress Bug description: [SRU justification] HOSTTAG=ip is unusable without this fix on some platforms [Impact] HOSTTAG functionality works as expected. [Fix] Loop on hostname -I for five seconds. Revert to HOSTTAG=hostname if IP address not found. [Test Case] The race condition is difficult to run into but the bug reporter has been able to confirm the change from a PPA (see comment #5). [Regression] Minimal, as the code path is only enhanced by one loop. Exit path remains the same. [Original description of the problem] == Comment: #0 - PAVITHRA R. PRAKASH - 2016-06-30 07:12:40 == ---Problem Description--- During kdump over ssh IP prefix will be present only in first dump, subsequent dumps will not have IP in directory name. ---Steps to Reproduce--- 1) apt-get install linux-crashdump 2) increase crashdump size: sudo vim /etc/default/grub.d/kexec-tools.cfg GRUB_CMDLINE_LINUX_DEFAULT="$GRUB_CMDLINE_LINUX_DEFAULT crashkernel =2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M 3) sudo update-grub ; reboot the machine 4) sudo sed -i 's/USE_KDUMP=0/USE_KDUMP=1/g' /etc/default/kdump-tools 5) kdump-config show # should show "ready to dump" 6) ssh-keygen -t rsa 7) Edit below parameters in /etc/default/kdump-tools SSH="root@<server IP>" SSH_KEY=/root/.ssh/id_rsa 8) kdump-config propagate 9) kdump-config show 10) reboot 11) echo "c" > /proc/sysrq-trigger 12) verify dump is created in ssh server. 13) trigger the crash again. Logs ===== root@ubuntu:/home/ubuntu# uname -a Linux ubuntu 4.4.0-26-generic #45-Ubuntu SMP Mon Jun 20 17:27:01 UTC 2016 ppc64le ppc64le ppc64le GNU/Linux dumps on ssh server when 3 crashes are triggered ------------------------------------------------------------------------ [root@ltc-fire5 crash]# ls 192.168.122.25-201606300523 [root@ltc-fire5 crash]# ls 192.168.122.25-201606300523 -201606300524 [root@ltc-fire5 crash]# ls 192.168.122.25-201606300523 -201606300524 -201606300525 [root@ltc-fire5 crash]# cd -201606300524 -bash: cd: -2: invalid option cd: usage: cd [-L|[-P [-e]]] [dir] [root@ltc-fire5 crash]# cd -- -201606300524 [root@ltc-fire5 -201606300524]# ls dmesg.201606300524 dump.201606300524 == Comment: #8 - Kevin W. Rudd - 2016-07-05 18:23:01 == Canonical, The behavior appears to be somewhat intermittent, and it looks as if define_stampdir() might be getting called before the network init has completed. If delaying this function is not practical, it might be helpful to have define_stampdir() fall back to using just "hostname" if "hostname -I" doesn't return any useful information for setting THIS_HOST. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1599561/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
