Bug 2028963 - Whereabouts should reconcile stranded IP addresses
Summary: Whereabouts should reconcile stranded IP addresses
Alias: None
Product: OpenShift Container Platform
Classification: Red Hat
Component: Networking
Version: 4.10
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
: 4.10.0
Assignee: Douglas Smith
QA Contact: Weibin Liang
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)
Last Closed: 2022-03-10 16:31:36 UTC
Target Upstream Version:

Attachments (Terms of Use)

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.


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

Note You need to log in before you can comment on or make changes to this bug.