Error: Failed calling webhook during Unified Collection Framework (UCF) nstallation

Products

• Network Observability

Issue/Introduction

The main Kubernetes installer runs for an extended period and fails when attempting to create an IP address pool ․​​​​​‌​‍

ERROR MESSAGE: "Internal error occurred: failed calling webhook "ipaddresspoolvalidationwebhook․metallb․io": failed to call webhook: Post "https://metallb-webhook-service․metallb-system․svc: 443/validate-metallb-io-v1beta1-ipaddresspool?timeout=10s": context deadline exceeded

SYMPTOMS:

• Pre-flight validate passes, but deployment fails

• Fails at the MetalLB stage

CONTEXT: Occurs during the main k8s installer execution for a new UCF cluster deployment ․

IMPACT: Prevents successful installation of the DX NetOps environment

Environment

NetOps 25.4.x
Unified Collection Framework 25.4.x multi node cluster.

 

 

Cause

Running 

kubectl get pods -A 

Shows pods going into CrashLoopBackoff repeatedly

kubectl commands would hang at times

Running curl command:

kubectl run -it --rm debug --image=curlimages/curl --restart=Never -- \
>    curl -vk https://metallb-webhook-service.metallb-system.svc.cluster.local:443/
If you don't see a command prompt, try pressing enter.
pod default/debug terminated (Error)

Showed the inability to connect

This showed the network was unstable

Resolution

Resolve any underlying network issue and verify cluster is stable before proceeding further