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Update documentation for Openshift 4.13 upgrade #267

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88 changes: 88 additions & 0 deletions docs/modules/ROOT/pages/how-tos/update_maintenance/v_4_13.adoc
Original file line number Diff line number Diff line change
@@ -0,0 +1,88 @@
= Upgrade to OpenShift 4.13 / Administrator Acknowledgment

OpenShift Container Platform 4.13 uses Kubernetes 1.26, which removed some of the deprecated `v1beta1` APIs.
A manual acknowledgment must be provided before the cluster can be upgraded to 4.13.

More information can be found in https://access.redhat.com/articles/6958394.

== Upgrade to 4.13

. Check requests to removed APIs
+
[source,bash]
----
kubectl get apirequestcounts \
--as=cluster-admin \
-o jsonpath='{range .items[?(@.status.removedInRelease!="")]}{.status.removedInRelease}{"\t"}{.metadata.name}{"\t"}{.status.requestCount}{"\n"}{end}'
----
+
Should print a report like the sample below.
The last column is requests in the last 24 hours.
+
[source,bash]
----
1.26 flowschemas.v1beta1.flowcontrol.apiserver.k8s.io 3630
1.26 horizontalpodautoscalers.v2beta2.autoscaling 281
1.26 prioritylevelconfigurations.v1beta1.flowcontrol.apiserver.k8s.io 329
----
+
If you see counts `> 0` you can check from whom the API calls are originating.
+
[source,bash]
----
kubectl get apirequestcounts horizontalpodautoscalers.v2beta2.autoscaling \
--as=cluster-admin \
-o jsonpath='{range ..username}{$}{"\n"}{end}' \
| sort | uniq
----
+
[NOTE]
====
Some services autodiscover supported APIs, notably https://kubernetes.io/docs/reference/command-line-tools-reference/kube-controller-manager/[kube-controller-manager] (`system:kube-controller-manager`) and ArgoCD (`system:serviceaccount:syn:argocd-application-controller`).
These services will show up as using deprecated APIs.
====
+
More advanced query: Show only resources with create and update requests.
+
[source,bash]
----
kubectl --as=cluster-admin get apirequestcount -ojson | jq '
.items[] |
select(
.status.removedInRelease == "1.26" and .status.requestCount > 0
) |
{
resource: .metadata.name,
requests: (
reduce .status.last24h[] as $hour ({"requests": 0}; .requests += (
reduce $hour.byNode[]? as $node ({"requests": 0}; .requests += (
reduce $node.byUser[]? as $user ({"requests": 0}; .requests += (
reduce $user.byVerb[]? as $verb (0; . + (
if $verb.verb == "watch" or $verb.verb == "list" or $verb.verb == "get" then
0
else
$verb.requestCount
end
))
))
).requests)
).requests)
).requests
}
'
----

. Provide the Acknowledgment
+
[source,bash]
----
kubectl patch cm admin-acks \
--as=cluster-admin \
-n openshift-config \
--patch '{"data":{"ack-4.12-kube-1.26-api-removals-in-4.13":"true"}}' \
--type=merge
----

. Upgrade the cluster
+
Follow the steps in xref:oc4:ROOT:how-tos/update_maintenance.adoc[Update/Maintenance].
1 change: 1 addition & 0 deletions docs/modules/ROOT/partials/nav.adoc
Original file line number Diff line number Diff line change
Expand Up @@ -85,6 +85,7 @@
** xref:oc4:ROOT:how-tos/update_maintenance/automated-upgrades-at-vshn.adoc[]
** xref:oc4:ROOT:how-tos/new_minor.adoc[Get ready for new minor]
** xref:oc4:ROOT:how-tos/update_maintenance/v_4_12.adoc[Upgrade to OCP4.12]
** xref:oc4:ROOT:how-tos/update_maintenance/v_4_13.adoc[Upgrade to OCP4.13]
** xref:oc4:ROOT:references/architecture/upgrade_controller.adoc[Upgrade Controller]

// Support
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