Bug 1995872
| Summary: | OpenShift SDN doesn't add NOTRACK rule to raw iptables table to prevent vxlan from reaching conntrack | ||
|---|---|---|---|
| Product: | OpenShift Container Platform | Reporter: | OpenShift BugZilla Robot <openshift-bugzilla-robot> |
| Component: | Networking | Assignee: | Andrew Stoycos <astoycos> |
| Networking sub component: | openshift-sdn | QA Contact: | Ying Wang <yingwang> |
| Status: | CLOSED ERRATA | Docs Contact: | |
| Severity: | high | ||
| Priority: | high | CC: | andreajess2003, astoycos, jeharris, ktenzer, palonsor, rhowe, scuppett, snetting, surya, tmanor, williamsdanielusa, yingwang, zzhao |
| Version: | 4.6 | Keywords: | FastFix |
| Target Milestone: | --- | ||
| Target Release: | 4.7.z | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2021-09-15 09:16:49 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: | 1995871 | ||
| Bug Blocks: | 1995873 | ||
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Comment 1
Ying Wang
2021-08-31 10:30:50 UTC
Deployed cluster via cluster-bot using openshift/sdn/pull/338, the issue is fixed. sh-4.4# iptables -t raw -S -P PREROUTING ACCEPT -P OUTPUT ACCEPT -N OPENSHIFT-NOTRACK -A PREROUTING -m comment --comment "disable conntrack for vxlan" -j OPENSHIFT-NOTRACK -A OUTPUT -m comment --comment "disable conntrack for vxlan" -j OPENSHIFT-NOTRACK -A OPENSHIFT-NOTRACK -p udp -m udp --dport 4789 -j NOTRACK sh-4.4# exit % oc version Client Version: 4.9.0-0.nightly-2021-08-18-144658 Server Version: 4.7.0-0.ci.test-2021-08-31-091530-ci-ln-s3w5yrb-latest Kubernetes Version: v1.20.0-1095+9689d22dc3121e-dirty Thanks, Ying Checked on version 4.7.0-0.nightly-2021-09-06-042858, issue is fixed. sh-4.4# iptables -t raw -S -P PREROUTING ACCEPT -P OUTPUT ACCEPT -N OPENSHIFT-NOTRACK -A PREROUTING -m comment --comment "disable conntrack for vxlan" -j OPENSHIFT-NOTRACK -A OUTPUT -m comment --comment "disable conntrack for vxlan" -j OPENSHIFT-NOTRACK -A OPENSHIFT-NOTRACK -p udp -m udp --dport 4789 -j NOTRACK % oc version Client Version: 4.9.0-0.nightly-2021-08-18-144658 Server Version: 4.7.0-0.nightly-2021-09-06-042858 Kubernetes Version: v1.20.0+9689d22 Thanks, Ying 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 (OpenShift Container Platform 4.7.30 bug fix update), 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://access.redhat.com/errata/RHBA-2021:3422 The information you share is very good and interesting I know more useful things. Keep posting interesting things and I will keep an eye on your posts. https://gettingoverit.co OpenShift SDN does not add a NOTRACK rule to the raw iptables table to prevent vxlan from reaching conntrack. This is considered a pretty good solution, very effective and meets the desired user criteria https://deathrun3d.io |