Bug 1334237
| Summary: | Dump a guest with long domain name by watchdog failed | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Fangge Jin <fjin> |
| Component: | libvirt | Assignee: | Martin Kletzander <mkletzan> |
| Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 7.3 | CC: | dyuan, rbalakri, yafu, zpeng |
| Target Milestone: | rc | Keywords: | Upstream |
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | libvirt-2.0.0-1.el7 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2016-11-03 18:45:04 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Patch posted upstream: https://www.redhat.com/archives/libvir-list/2016-June/msg00776.html Fixed upstream with v1.3.5-278-gab74f60a3668:
commit ab74f60a3668c401ff812ff0beb38f34bf4dcc6b
Author: Martin Kletzander <mkletzan>
Date: Mon Jun 13 16:28:06 2016 +0200
qemu: Shorten domain name for watchdog coredump
Reproduced with libvirt-1.3.4-1.el7. Steps are as comment0. Verify pass with libvirt-2.0.0-3.el7.x86_64. Test steps: 1.Prepare a guest with 248-character in domain name and with watchdog device: virsh # dumpxml 1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111 ... <watchdog model='i6300esb' action='dump'> <alias name='watchdog0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x0c' function='0x0'/> </watchdog> ... 2.In guest: #echo 1>/dev/watchdog 3.Wait 30s, check dump file, could see dump file create correctly: #ll /var/lib/libvirt/qemu/dump/ -rw-------. 1 root root 1822568040 Jul 26 09:59 6-11111111111111111111-2016-07-26-09:59:37 Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHSA-2016-2577.html |
Description of problem: Prepare a guest with long name(248-character), try to get guest dump file by watchdog, but no dump file is generated due to file name too long: 2016-05-05 15:20:37.466+0000: 3440: error : qemuOpenFileAs:3076 : Failed to create file '/var/lib/libvirt/qemu/dump/1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111-1462461637': File name too long 2016-05-05 15:20:37.466+0000: 3440: error : processWatchdogEvent:3946 : operation failed: Dump failed Version-Release number of selected component (if applicable): libvirt-1.3.4-1.el7 How reproducible: 100% Steps: 1.Prepare a guest with 248-character in domain name and with watchdog device: virsh # dumpxml 1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111 ... <watchdog model='i6300esb' action='dump'> <alias name='watchdog0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x0c' function='0x0'/> </watchdog> ... 2.In guest: #echo 1>/dev/watchdog Wait 30s, check dump file # ll /var/lib/libvirt/qemu/dump/ (no dump file is generated) 3.There is error log in libvirtd.log: 2016-05-05 15:20:37.466+0000: 3440: error : qemuOpenFileAs:3076 : Failed to create file '/var/lib/libvirt/qemu/dump/1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111-1462461637': File name too long 2016-05-05 15:20:37.466+0000: 3440: error : processWatchdogEvent:3946 : operation failed: Dump failed Actual results: Dump guest by watchdog failed when domain has a long name Expected results: Dump guest by watchdog successfully. Additional info: