How do I set up auto-scaling for MinIO on Kubernetes?

In this guide, we will set up a MinIO instance on a Kubernetes cluster and configure auto-scaling using the Horizontal Pod Autoscaler (HPA). MinIO is a high-performance, S3-compatible object storage system. Auto-scaling ensures that the MinIO deployment can handle varying loads by automatically adjusting the number of pods.

Key Points

Create a Kubernetes namespace for MinIO.
Deploy MinIO using a Kubernetes Deployment resource.
Expose MinIO using a Kubernetes Service resource.
Configure auto-scaling using a Horizontal Pod Autoscaler resource.

Below is the complete Pulumi program in TypeScript:

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

// Create a namespace for MinIO
const minioNamespace = new k8s.core.v1.Namespace("minio-namespace", {
    metadata: {
        name: "minio",
    },
});

// Deploy MinIO
const minioDeployment = new k8s.apps.v1.Deployment("minio-deployment", {
    metadata: {
        namespace: minioNamespace.metadata.name,
        name: "minio",
    },
    spec: {
        selector: {
            matchLabels: {
                app: "minio",
            },
        },
        replicas: 1,
        template: {
            metadata: {
                labels: {
                    app: "minio",
                },
            },
            spec: {
                containers: [
                    {
                        name: "minio",
                        image: "minio/minio:latest",
                        args: ["server", "/data"],
                        ports: [
                            {
                                containerPort: 9000,
                                name: "minio",
                            },
                        ],
                        env: [
                            {
                                name: "MINIO_ACCESS_KEY",
                                value: "minioadmin",
                            },
                            {
                                name: "MINIO_SECRET_KEY",
                                value: "minioadmin",
                            },
                        ],
                    },
                ],
            },
        },
    },
});

// Expose MinIO
const minioService = new k8s.core.v1.Service("minio-service", {
    metadata: {
        namespace: minioNamespace.metadata.name,
        name: "minio",
    },
    spec: {
        selector: {
            app: "minio",
        },
        ports: [
            {
                port: 9000,
                targetPort: "minio",
                protocol: "TCP",
            },
        ],
    },
});

// Configure Horizontal Pod Autoscaler
const minioHPA = new k8s.autoscaling.v1.HorizontalPodAutoscaler("minio-hpa", {
    metadata: {
        namespace: minioNamespace.metadata.name,
        name: "minio",
    },
    spec: {
        scaleTargetRef: {
            apiVersion: "apps/v1",
            kind: "Deployment",
            name: "minio",
        },
        minReplicas: 1,
        maxReplicas: 10,
        targetCPUUtilizationPercentage: 50,
    },
});

Summary

In this guide, we created a Pulumi program to deploy MinIO on a Kubernetes cluster and configured auto-scaling using the Horizontal Pod Autoscaler. We defined a namespace, deployment, service, and HPA to ensure MinIO can scale according to CPU utilization. This setup helps maintain performance and availability as demand changes.

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