How do I configure a kubernetes cert-manager.io clusterissuer with Pulumi?
In this guide, we will configure a Kubernetes ClusterIssuer
resource using Pulumi. The ClusterIssuer
is a cert-manager resource that defines how certificates should be obtained. We will use Pulumi to define and create this resource in your Kubernetes cluster.
Steps:
- Install the necessary Pulumi packages.
- Define the Kubernetes provider.
- Create the
ClusterIssuer
resource.
Below is the complete Pulumi program written in TypeScript:
import * as pulumi from "@pulumi/pulumi";
import * as k8s from "@pulumi/kubernetes";
// Define the Kubernetes provider
const k8sProvider = new k8s.Provider("k8sProvider", {
kubeconfig: process.env.KUBECONFIG,
});
// Define the ClusterIssuer resource
const clusterIssuer = new k8s.apiextensions.CustomResource("letsencryptClusterIssuer", {
apiVersion: "cert-manager.io/v1",
kind: "ClusterIssuer",
metadata: {
name: "letsencrypt-prod",
},
spec: {
acme: {
server: "https://acme-v02.api.letsencrypt.org/directory",
email: "your-email@example.com",
privateKeySecretRef: {
name: "letsencrypt-prod",
},
solvers: [{
http01: {
ingress: {
class: "nginx",
},
},
}],
},
},
}, { provider: k8sProvider });
// Export the name of the ClusterIssuer
export const clusterIssuerName = clusterIssuer.metadata.name;
Key Points:
- Kubernetes Provider: We use the
k8s.Provider
to connect to the Kubernetes cluster. - ClusterIssuer Resource: The
ClusterIssuer
resource is defined with the necessary specifications for cert-manager to use Let’s Encrypt. - ACME Configuration: The ACME server URL, email, and private key secret reference are specified for Let’s Encrypt.
- Solver Configuration: An HTTP-01 solver is configured to use the
nginx
ingress class for solving ACME challenges.
Summary
In this guide, we configured a ClusterIssuer
resource in Kubernetes using Pulumi. This configuration enables cert-manager to obtain certificates from Let’s Encrypt using the HTTP-01 challenge method. The ClusterIssuer
is essential for managing certificates in a Kubernetes cluster, and Pulumi simplifies the process of defining and deploying this resource.
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