------- Comment From wil...@us.ibm.com 2016-12-01 15:14 EDT-------
Thank you for the quick turnaround. I verified the new package with my
test code. The bug submitter will verify his set-up as well.
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keepalived raising VIP apply error
Status in keepalived package in Ubuntu:
Status in keepalived source package in Xenial:
Status in keepalived source package in Yakkety:
* keepalived on ppc64el (due to a large page size) experiences
"Netlink: error: message truncated" messages.
* These Netlink truncations result in keepalived thinking that the
the underlying device does not exist, even though it does.
* Creating 100 veth interfaces ppc64el and verify if "Netlink: error:
message truncated" errors are emitted. If so, the bug is present. If
not, the bug is fixed.
* This is code issue, fixed upstream, in the keepalived code when the
system page size exceeds 4096. The upstream fix was backported to all
releases and should only properly limit the size of the buffer used
for netlink to at most 8192 on systems with a page size greater than
8192. I believe risk of regression is very low.
* Using the tests provided by David Wilder, I ran on both x86_64 and
ppc64el LXD containers. Without the backported changes, I saw no
issues on x86_64, and the reported issue on ppc64el (as expected, as a
page size greater than 4K is required to see the buffer size issue).
With the backported changes, both architectures show no issue with the
== Comment: #0 - Andrew Thorstensen - 2016-11-17 09:50:25 ==
Using Ubuntu 16.04 on ppc64le, we are building a 'neutron network node' using
the VRRP configuration (built on keepalived).
Information on this OpenStack configuration can be found here:
When we run, the configuration is failing to apply via keepalived.
The logs post the following:
Nov 17 02:58:31 p8test-lp1 Keepalived_vrrp: VRRP is trying to assign
VIP to unknown qr-a5f5ba96-52 interface !!! go out and fix your conf !!!
However, the device DOES exist. But the keepalived config just
doesn't always deploy it.
ii keepalived 1:1.2.19-1
ppc64el Failover and monitoring daemon for LVS clusters
This configuration sometimes works, but does sometimes fail on Ubuntu
Linux p8test-lp1 4.4.0-47-generic #68-Ubuntu SMP Wed Oct 26 19:38:24 UTC 2016
ppc64le ppc64le ppc64le GNU/Linux
---Additional Hardware Info---
This is a Power8 system with Ubuntu 16.04.1 installed. Though we see no
indication that this is specific to Power.
Machine Type = S822L
Machine Type = 8286-42A
---Steps to Reproduce---
Install openstack. Run the network node in a VRRP HA configuration. Create
a router and assign a global IP.
== Comment: #5 - David J. Wilder - 2016-11-17 15:58:04 ==
The problem is fixed in this upstream commit:
On systems with a page size larger than 4096 keepalived may report:
"Netlink: error: message truncated" messages
This error was reported on a ppc64le in an OpenStack/Nutron environment.
Ppc64le is using a 64k pages size. I found that keepalived's netlink recvmsg
buffer was too small causing messages to be truncated. The size of the read
buffer for the netlink socket should be based on page size however, it should
not exceed 8192. See the comment in the patch.
I tested the fix by creating 100 veth interfaces and verifying the errors
did not return.
Signed-off-by: David Wilder <dwil...@us.ibm.com>
Signed-off-by: Quentin Armitage <quen...@armitage.org.uk>
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