Troubleshoot Consul-Connect-Injector: Failed to Call Wehbook x509 Certificate Expired or Not Yet Valid

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Introduction

The following article will help address the x509: certificate has expired or is not yet validerror message associated with the connect-injector and controller pods in Kubernetes.

Problem

The connect-injector and controller pods experience a recurring issue where they go into a crashloopback state.

• This issue is accompanied by the following error message:

Internal error occurred: failed calling webhook "consul-connect-injector.consul.hashicorp.com": failed to call webhook: Post "https:/consul-connect-injector.consul.svc:443/mutate?timeout=10s': x509: certificate has expired or is not yet valid.

General Flow

Causes

The issue of connect-injector and controller pods encountering crashloopback errors with the specified message can be attributed to the following causes:

• Kubernetes Resource Contention

  • Resource contention within the Kubernetes cluster may impede the creation and renewal of certificates.

• Kube API Issues

  • Problems with the Kubernetes API can disrupt the proper functioning of the webhook and certificate management.

Solution

To rectify the issue and resolve the crashloopback scenario, follow these steps:

1. Restart the consul-webhook-cert-manager pod.
   • This action initiates the creation of a fresh certificate authority (CA) for the consul-connect-injector mutating webhook.
   • Based on the new CA, a new secret named consul-connect-inject-webhook-cert should be automatically generated within the consul namespace.
2. Review the logs to verify the x509: certificate has expired or is not yet valid error message no longer appears and the connect-injector pod is no longer showing in a crashloopbackstatus.

Outcome

By adhering to the aforementioned solution, users can effectively mitigate the failed to call webhook x509 certificate expired or not yet valid error message associated with the consul-connect-injector and consul-controller pods