Using kubernetes operator.victoriametrics.com with cert-manager.k8s.cloudflare.com

Question

Pulumi · Accepted Answer

To use the VictoriaMetrics operator on Kubernetes with cert-manager for TLS certificate management, you would typically follow these steps:

Install cert-manager: cert-manager is a Kubernetes tool that automates the management and issuance of TLS certificates. It will handle the creation and renewal of TLS certificates for your services.
Deploy the VictoriaMetrics operator: The VictoriaMetrics operator manages VictoriaMetrics components on Kubernetes. It automates deployment, scaling, and operations of the VictoriaMetrics components.
Configure VictoriaMetrics to use TLS: Configure the VictoriaMetrics components to require and use TLS for secure communications. This involves creating a Certificate resource that defines how the certificate should be obtained.
Deploy an Ingress controller: If you need to expose the VictoriaMetrics services to the outside world, you would typically use an Ingress controller with a valid TLS certificate.

Below is a Pulumi program written in TypeScript that demonstrates the setup of these components. This program assumes you already have a Kubernetes cluster and have setup Pulumi with the appropriate configurations. Make sure to replace placeholder values such as <your-domain> with actual values that apply to your use case.

import * as k8s from "@pulumi/kubernetes";
import * as pulumi from "@pulumi/pulumi";

// Step 1: Install cert-manager.
// This includes creating necessary CRDs, deploying cert-manager components, and setting up Issuers or ClusterIssuers.
const certManagerNamespace = new k8s.core.v1.Namespace("cert-manager-namespace", {
    metadata: { name: "cert-manager" }
});

const certManagerChart = new k8s.helm.v3.Chart("cert-manager", {
    namespace: certManagerNamespace.metadata.name,
    chart: "cert-manager",
    version: "v1.5.3",
    fetchOpts: { repo: "https://charts.jetstack.io" },
    values: { installCRDs: true },
});

// Step 2: Deploy the VictoriaMetrics operator.
// Deploy the operator in your Kubernetes cluster.
const vmOperatorChart = new k8s.helm.v3.Chart("victoria-metrics-operator", {
    chart: "victoria-metrics-operator",
    version: "<chart-version>",
    fetchOpts: { repo: "https://victoriametrics.github.io/helm-charts/" },
    // Include additional values to configure the operator
});

// Step 3: Configure VictoriaMetrics to use TLS.
// Create a custom Certificate resource for your VictoriaMetrics components.
const vmCertificate = new k8s.apiextensions.CustomResource("vm-certificate", {
    apiVersion: "cert-manager.io/v1",
    kind: "Certificate",
    metadata: {
        name: "victoria-metrics-cert",
        namespace: "<namespace-where-victoriametrics-is-deployed>",
    },
    spec: {
        secretName: "victoria-metrics-tls",
        issuerRef: {
            name: "letsencrypt-prod", // Replace with your Issuer or ClusterIssuer
            kind: "ClusterIssuer",
        },
        dnsNames: ["<your-domain>"], // Replace with your actual domain
    },
}, { provider: certManagerChart });

// Step 4: Optionally deploy an Ingress controller.
// If you want to expose the VictoriaMetrics services to the internet, set up Ingress with TLS.

// Note: Before you proceed, ensure that you have pointed your domain's DNS records to your Ingress controller's IP.

const ingressController = new k8s.networking.v1.Ingress("ingress-controller", {
    metadata: {
        name: "victoria-metrics-ingress",
        annotations: {
            "kubernetes.io/ingress.class": "nginx",
            "cert-manager.io/cluster-issuer": "letsencrypt-prod", // Use the same ClusterIssuer as above
        },
    },
    spec: {
        tls: [{
            hosts: ["<your-domain>"], // Replace with your actual domain
            secretName: vmCertificate.spec.secretName, // Secret will be created by cert-manager
        }],
        rules: [{
            host: "<your-domain>", // Replace with your actual domain
            http: {
                paths: [{
                    path: "/",
                    pathType: "Prefix",
                    backend: {
                        service: {
                            name: "victoria-metrics-service", // Replace with your actual service name
                            port: {
                                number: 80, // Port on which your service is exposed
                            },
                        },
                    },
                }],
            },
        }],
    },
}, { provider: certManagerChart });

// Export the ingress IP to access the VictoriaMetrics endpoint
export const ingressIp = ingressController.status.loadBalancer.ingress[0].ip;

This program sets up a VictoriaMetrics instance with TLS termination using cert-manager and optionally exposes it with an Ingress controller.

It's critical to ensure that:

The versions of the charts are compatible with your cluster and meet your requirements. Replace <chart-version> with the actual chart version you wish to deploy.
The DNS names and other placeholders <your-domain> are replaced with the actual information associated with your deployment.
The namespace for the VictoriaMetrics components is specified correctly.
Your DNS records are appropriately configured for the ingress to work correctly. They must point to the IP of the Ingress controller once it's deployed.

Remember that deploying and managing Kubernetes objects can be complex, and it's essential to understand each component's role and how they interact with each other.