Large OpenShift Container Platform 4.10.24 - Cluster is failing to update router-certs secret in openshift-config-managed namespace as the given secret is too big.

2022-09-01T06:24:15.157333294Z 2022-09-01T06:24:15.157Z ERROR operator.init.controller.certificate_publisher_controller controller/controller.go:266  Reconciler error  {"name": "foo-bar", "namespace": "openshift-ingress-operator", "error": "failed to ensure global secret: failed to update published router certificates secret: Secret \"router-certs\" is invalid: data: Too long: must have at most 1048576 bytes"}

The OpenShift Container Platform 4 - Cluster has 180 IngressController configured with endpointPublishingStrategy set to private.

Now the default certificate needs to be replaced but is not properly replicated to openshift-authentication namespace and potentially other location because of the problem mentioned (since the required secret can not be updated)

OpenShift Container Platform 4.10.24

Always

1. Install OpenShift Container Platform 4.10
2. Create 180 IngressController with specific certificates
3. Check openshift-ingress-operator logs to see how it fails to update/create the necessary secret in openshift-config-managed

2022-09-01T06:24:15.157333294Z 2022-09-01T06:24:15.157Z ERROR operator.init.controller.certificate_publisher_controller controller/controller.go:266  Reconciler error  {"name": "foo-bar", "namespace": "openshift-ingress-operator", "error": "failed to ensure global secret: failed to update published router certificates secret: Secret \"router-certs\" is invalid: data: Too long: must have at most 1048576 bytes"}

No matter how many IngressController is created, secret management taken care by Operators need to work, even if data exceed 1 MB size limitation. In that case an approach needs to exist to split data into multiple secrets or handle it otherwise.