Whereabouts clear IP allocations

README.md

Clearing IP allocations manually with Whereabouts

This outlines a process for clearing IP address allocations with Whereabouts manually. This clears all allocations, you could be more surgical about it, however, this is efficient if it's possible.

NOTE I have another procedure somewhere which has fancy bash commands to make this easier, and is fully tested, however, in theory this "should just work" (you've heard that before)

Overview

1. Stop all pods which use Multus + Whereabouts (if possible)
2. Clear IP allocations
3. Start any pods which use Multus + Whereabouts.

Step 1 and 3 are hopefully intuitive and are done in order to avoid possible inconsistencies.

For step 2:

oc get crds | grep -i whereabouts

This should result in two CRDs, overlappingrangeipreservations.whereabouts.cni.cncf.io and ippools.whereabouts.cni.cncf.io

For each of those, perform:

oc get overlappingrangeipreservations.whereabouts.cni.cncf.io -A

and then with each item there.

oc delete $names-from-above -n $namespace-here

Repeat with ippools.whereabouts.cni.cncf.io

Thanks Doug! This worked great, one nit the oc delete needs the crd name. Here is a quick way I deleted the bunch:
oc delete overlappingrangeipreservations.whereabouts.cni.cncf.io ` oc get overlappingrangeipreservations.whereabouts.cni.cncf.io -A | awk '{print "-n",$1," ",$2}'`

Another reference: https://bugzilla.redhat.com/show_bug.cgi?id=1914053#c3