Bug 2028963 - Whereabouts should reconcile stranded IP addresses
Summary: Whereabouts should reconcile stranded IP addresses
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: OpenShift Container Platform
Classification: Red Hat
Component: Networking
Version: 4.10
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
: 4.10.0
Assignee: Douglas Smith
QA Contact: Weibin Liang
URL:
Whiteboard:
Depends On:
Blocks: 2028964
TreeView+ depends on / blocked
 
Reported: 2021-12-03 20:23 UTC by Douglas Smith
Modified: 2023-09-15 01:17 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Enhancement
Doc Text:
Feature: Implements an IP reconciliation job for Whereabouts IPAM CNI called "ip-reconciler" which runs as a Kubernetes cronjob. Reason: On occasion events occur where the CNI DEL action will not complete for a given pod (for example, a forcefully powered off node), and in such a case stored IP address allocations may be left stranded and unable to be allocated without manual intervention. Result: Stranded IP address allocations are garbage collected automatically on a periodic basis to free unused IP addresses.
Clone Of:
: 2028964 (view as bug list)
Environment:
Last Closed: 2022-03-10 16:31:36 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2022:0056 0 None Closed openshift-apiserver pod flapping between pending and running mode 2022-04-19 14:02:49 UTC

Description Douglas Smith 2021-12-03 20:23:40 UTC 
Description of problem: IP reconciliation is a feature in the latest whereabouts, and due to reports, this feature should be backported all the way to 4.6.z. The feature is in the form of a cron job which reconciles the IP addresses.


Version-Release number of selected component (if applicable): 4.6-4.10


How reproducible: Specialized. Customers often experience this when nodes are rebooted, or pods are force deleted, and therefore CNI DEL calls aren't processed in their entirety by Whereabouts


Steps to Reproduce: (We will produce a procedure which produces orphaned IP addresses)

Actual results: IP addresses will remain stranded, and never utilized again.


Expected results: IP addresses that were stranded become available for use again.


Additional info: 4.10 has the reconciliation code but still requires a bug fix from upstream.
Comment 1 Douglas Smith 2022-01-04 13:50:51 UTC 
This can be verified using this procedure: https://gist.github.com/dougbtv/599e8a1a747fde300d46e912f573b40f

Thank you!
Comment 4 errata-xmlrpc 2022-03-10 16:31:36 UTC 
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 4.10.3 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-2022:0056
Comment 6 Red Hat Bugzilla 2023-09-15 01:17:49 UTC 
The needinfo request[s] on this closed bug have been removed as they have been unresolved for 500 days
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