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  2. Deploy ClickHouse on Kubernetes with TypeScript

How do I deploy the ClickHouse Docker image on Kubernetes with TypeScript?

In this guide, we will deploy the ClickHouse Docker image on a Kubernetes cluster using Pulumi and TypeScript. ClickHouse is an open-source columnar database management system that allows for real-time analytics using SQL queries.

The following Pulumi program will:

  1. Create a Kubernetes namespace.
  2. Deploy a ClickHouse Pod.
  3. Expose the ClickHouse service within the cluster.
import * as pulumi from "@pulumi/pulumi";
import * as k8s from "@pulumi/kubernetes";

// Define the Kubernetes namespace
const namespace = new k8s.core.v1.Namespace("clickhouse-ns", {
    metadata: { name: "clickhouse" },
});

// Define the ClickHouse Pod
const clickhousePod = new k8s.core.v1.Pod("clickhouse-pod", {
    metadata: {
        namespace: namespace.metadata.name,
        name: "clickhouse",
        labels: { app: "clickhouse" },
    },
    spec: {
        containers: [{
            name: "clickhouse",
            image: "yandex/clickhouse-server:latest",
            ports: [{ containerPort: 8123 }, { containerPort: 9000 }],
        }],
    },
});

// Define the ClickHouse Service
const clickhouseService = new k8s.core.v1.Service("clickhouse-service", {
    metadata: {
        namespace: namespace.metadata.name,
        name: "clickhouse",
    },
    spec: {
        selector: { app: "clickhouse" },
        ports: [
            { port: 8123, targetPort: 8123, protocol: "TCP" },
            { port: 9000, targetPort: 9000, protocol: "TCP" },
        ],
    },
});

// Export the service URL
export const clickhouseServiceURL = pulumi.interpolate`http://${clickhouseService.metadata.name}.${namespace.metadata.name}.svc.cluster.local:8123`;

Key Points

  • Namespace: A Kubernetes namespace is created to isolate the ClickHouse resources.
  • Pod: A Pod is defined to run the ClickHouse Docker container.
  • Service: A Service is created to expose the ClickHouse Pod internally within the Kubernetes cluster.
  • Export: The URL of the ClickHouse service is exported for easy access.

Summary

This Pulumi program sets up a Kubernetes namespace, deploys a ClickHouse Pod, and exposes it via a Kubernetes Service. This allows you to run ClickHouse on your Kubernetes cluster and access it using the provided service URL.

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