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The cert-manager Operator for Red Hat OpenShift is a cluster-wide service that provides application certificate lifecycle management. The cert-manager Operator for Red Hat OpenShift allows you to integrate with external certificate authorities and provides certificate provisioning, renewal, and retirement.

About the cert-manager Operator for Red Hat OpenShift

The cert-manager project introduces certificate authorities and certificates as resource types in the Kubernetes API, which makes it possible to provide certificates on demand to developers working within your cluster. The cert-manager Operator for Red Hat OpenShift provides a supported way to integrate cert-manager into your OpenShift Container Platform cluster.

The cert-manager Operator for Red Hat OpenShift provides the following features:

  • Support for integrating with external certificate authorities

  • Tools to manage certificates

  • Ability for developers to self-serve certificates

  • Automatic certificate renewal

Do not attempt to use both cert-manager Operator for Red Hat OpenShift for OpenShift Container Platform and the community cert-manager Operator at the same time in your cluster.

Also, you should not install cert-manager Operator for Red Hat OpenShift for OpenShift Container Platform in multiple namespaces within a single OpenShift cluster.

Supported issuer types

The cert-manager Operator for Red Hat OpenShift supports the following issuer types:

  • Automated Certificate Management Environment (ACME)

  • Certificate authority (CA)

  • Self-signed

  • Vault

  • Venafi

Certificate request methods

There are two ways to request a certificate using the cert-manager Operator for Red Hat OpenShift:

Using the cert-manager.io/CertificateRequest object

With this method a service developer creates a CertificateRequest object with a valid issuerRef pointing to a configured issuer (configured by a service infrastructure administrator). A service infrastructure administrator then accepts or denies the certificate request. Only accepted certificate requests create a corresponding certificate.

Using the cert-manager.io/Certificate object

With this method, a service developer creates a Certificate object with a valid issuerRef and obtains a certificate from a secret that they pointed to the Certificate object.

Additional resources