Bug 1990115
Summary: | Multus whereabouts assigns duplicate IP addresses to pods when have large number of replicas | ||
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Product: | OpenShift Container Platform | Reporter: | Douglas Smith <dosmith> |
Component: | Networking | Assignee: | Douglas Smith <dosmith> |
Networking sub component: | multus | QA Contact: | Weibin Liang <weliang> |
Status: | CLOSED ERRATA | Docs Contact: | |
Severity: | high | ||
Priority: | high | CC: | aapark, anbhat, dosmith, ealcaniz, eminguez, pibanezr, tohayash, weliang, xingli, yingwang |
Version: | 4.7 | ||
Target Milestone: | --- | ||
Target Release: | 4.9.0 | ||
Hardware: | Unspecified | ||
OS: | Unspecified | ||
Whiteboard: | Telco:Networking | ||
Fixed In Version: | Doc Type: | If docs needed, set a value | |
Doc Text: | Story Points: | --- | |
Clone Of: | 1990113 | Environment: | |
Last Closed: | 2021-10-18 17:44:56 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: | 1990113 |
Comment 2
Weibin Liang
2021-08-06 19:10:40 UTC
Verified on version below and the issue is fixed. lilia@liliadeMacBook-Pro mytest % oc version Client Version: 4.7.5 Server Version: 4.9.0-0.nightly-2021-08-17-122812 Kubernetes Version: v1.22.0-rc.0+3dfed96 Followed the guide to verify this issue: https://gist.github.com/dougbtv/b12ae309790c1e7c1fab045cff7f7668#verification 1. create network-attachment-definition lilia@liliadeMacBook-Pro mytest % oc get network-attachment-definitions.k8s.cni.cncf.io NAME AGE macvlan-bridge-whereabouts 27m yaml file: apiVersion: "k8s.cni.cncf.io/v1" kind: NetworkAttachmentDefinition metadata: name: macvlan-bridge-whereabouts namespace: bcd spec: config: '{ "cniVersion": "0.3.1", "name": "whereabouts", "type": "macvlan", "master": "br-ex", "mode": "bridge", "ipam": { "type": "whereabouts", "range": "192.18.0.0/15" } }' 2. Create the replica set via yaml as below. apiVersion: apps/v1 kind: ReplicaSet metadata: name: whereabouts-test labels: app: whereabouts-test tier: whereabouts-test spec: # modify replicas according to your case replicas: 200 selector: matchLabels: tier: whereabouts-test template: metadata: labels: tier: whereabouts-test annotations: k8s.v1.cni.cncf.io/networks: macvlan-bridge-whereabouts spec: containers: - name: samplepod command: ["/bin/ash", "-c", "trap : TERM INT; sleep infinity & wait"] image: quay.io/openshifttest/hello-sdn@sha256:d5785550cf77b7932b090fcd1a2625472912fb3189d5973f177a5a2c347a1f95 3. After 200 pods were running, checked ip addresses and found no duplicate ip. lilia@liliadeMacBook-Pro mytest % oc get pods | grep whereabouts-test | awk '{print $1}' | xargs -I {} oc exec -t {} -- ip a | grep "inet 192" | awk '{print $2}' | sort | uniq | wc -l 200 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 (Moderate: OpenShift Container Platform 4.9.0 bug fix and security 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/RHSA-2021:3759 |