Bug 720347
| Summary: | RHEL 6.1 Xen paravirt guest is getting network outage during live migration (host side) | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 5 | Reporter: | Laszlo Ersek <lersek> |
| Component: | kernel-xen | Assignee: | Laszlo Ersek <lersek> |
| Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 5.6 | CC: | drjones, leiwang, pcao, qwan, shwang, xen-maint |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2012-02-21 03:44:29 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | |||
| Bug Blocks: | 514489, 697021, 713585, 733416, 733651 | ||
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Description
Laszlo Ersek
2011-07-11 13:25:44 UTC
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release. Patch(es) available in kernel-2.6.18-282.el5 You can download this test kernel (or newer) from http://people.redhat.com/jwilson/el5 Detailed testing feedback is always welcomed. I reproduced the bug with kernel version 2.6.18-275.el5.
Then update the guest kernel to 2.6.18-300.el5 with xen-3.0.3-135.el5 and do the test for 20 times (host: i386 and x86_64, intel and amd). Verify with the 6.2 pv guest(i386 and x86_64, 2.6.32-220.el6).There are only little packets (1~2 packets) lost during the live migration. It is acceptable. So change this bug to VERIFIED.
Bug verify steps:
1. Start nfs in hostA and mount the nfs to hostB.
#mount $hostA_ip:/root/img /root/img
2. Modify the xen config file and restart xend service. Boot up the pv guest.
Edit "/etc/xen/xend-config.sxp" on these two machines as following:
(xend-relocation-server yes)
(xend-relocation-port 8002)
(xend-relocation-address '')
(xend-relocation-hosts-allow '')
# service xend restart
# xm cr pv-config.cfg
For RHEL6.2 PV guest, login to modify parameters. Set net.ipv4.conf.{all,default,IFACE}.arp_notify to 1 as following:
#sysctl net.ipv4.conf.all.arp_notify = 1
#sysctl net.ipv4.conf.default.arp_notify = 1
#sysctl net.ipv4.conf.lo.arp_notify = 1
#sysctl net.ipv4.conf.eth0.arp_notify = 1
3. Ping the guest from the other machine.
$ ping $guest_ip
4. Live migrate the guest between hostA and hostB.
# xm migrate -l pv-guest $hostA_ip
# xm migrate -l pv-guest $hostB_ip
5. Check the ping results after live migration finish.
6. Redo step3 to step5 for 20 times.
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. http://rhn.redhat.com/errata/RHSA-2012-0150.html |