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Red Hat Bugzilla – Bug 1570399
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Bug 1570399
-
[3.8] DNS to local node vs. static egress IP
Summary:
[3.8] DNS to local node vs. static egress IP
Keywords
:
Status
:
CLOSED CURRENTRELEASE
Alias:
None
Product:
OpenShift Container Platform
Classification:
Red Hat
Component:
Networking
Sub Component:
---
DNS
Metal LB
router
runtime-cfg
SR-IOV
kubernetes-nmstate
kubernetes-nmstate-operator
kuryr
mDNS
multus
NetObs
openshift-sdn
ovn-kubernetes
ptp
Version:
3.8.0
Hardware:
x86_64
OS:
Linux
Priority:
medium
Severity:
medium
Target Milestone:
---
Target Release
:
3.8.z
Assignee:
Dan Winship
QA Contact:
Meng Bo
Docs Contact:
URL:
Whiteboard:
Depends On:
1557924
Blocks:
TreeView+
depends on
/
blocked
Reported:
2018-04-22 15:00 UTC by
Dan Winship
Modified:
2018-08-23 14:15 UTC (
History
)
CC List:
2 users
(
show
)
aos-bugs
bbennett
Fixed In Version:
Doc Type:
Bug Fix
Doc Text:
Cause: When using per-namespace static egress IPs, all external traffic is routed through the egress IP. "External" means all traffic which isn't directed to another pod, and so includes traffic from the pod to the pod's node. Consequence: When pods are told to use the node's IP address for DNS, and the pod is using a static egress IP, then DNS traffic will be routed to the egress node first, and then back to the original node, which might be configured to not accept DNS requests from other hosts, causing the pod to be unable to resolve DNS. Fix: pod-to-node DNS requests now bypass the egress IP and go directly to the node Result: DNS works
Clone Of:
1570398
Environment:
Last Closed:
2018-08-23 14:15:51 UTC
Target Upstream Version:
Embargoed:
Attachments
(Terms of Use)
Links
System
ID
Private
Priority
Status
Summary
Last Updated
Github
ose/pull/1219
0
None
None
None
2018-04-22 15:03:02 UTC
Comment 1
Dan Winship
2018-04-22 15:03:03 UTC
https://github.com/openshift/ose/pull/1219
Comment 2
Dan Winship
2018-08-23 14:15:51 UTC
closing old fixed 3.8 bugs
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