How do I manage Kubernetes Ingress for ClickHouse?
In this guide, we will set up a Kubernetes Ingress resource for ClickHouse using Pulumi. ClickHouse is a fast open-source columnar database management system. We will define a Kubernetes Ingress resource to expose ClickHouse services to the outside world.
Key Points
- Define a Kubernetes namespace for ClickHouse.
- Deploy a ClickHouse StatefulSet and Service.
- Create an Ingress resource to route traffic to the ClickHouse service.
import * as pulumi from "@pulumi/pulumi";
import * as k8s from "@pulumi/kubernetes";
// Define the namespace
const namespace = new k8s.core.v1.Namespace("clickhouse-ns", {
metadata: {
name: "clickhouse-ns",
},
});
// Deploy ClickHouse StatefulSet
const clickhouseStatefulSet = new k8s.apps.v1.StatefulSet("clickhouse", {
metadata: {
namespace: namespace.metadata.name,
name: "clickhouse",
},
spec: {
serviceName: "clickhouse",
replicas: 1,
selector: {
matchLabels: {
app: "clickhouse",
},
},
template: {
metadata: {
labels: {
app: "clickhouse",
},
},
spec: {
containers: [{
name: "clickhouse",
image: "yandex/clickhouse-server:latest",
ports: [{
containerPort: 8123,
name: "http",
}],
volumeMounts: [{
name: "clickhouse-storage",
mountPath: "/var/lib/clickhouse",
}],
}],
},
},
volumeClaimTemplates: [{
metadata: {
name: "clickhouse-storage",
},
spec: {
accessModes: ["ReadWriteOnce"],
resources: {
requests: {
storage: "10Gi",
},
},
},
}],
},
});
// Create a Service for ClickHouse
const clickhouseService = new k8s.core.v1.Service("clickhouse", {
metadata: {
namespace: namespace.metadata.name,
name: "clickhouse",
},
spec: {
ports: [{
port: 8123,
targetPort: "http",
protocol: "TCP",
}],
selector: {
app: "clickhouse",
},
},
});
// Define Ingress to expose ClickHouse service
const clickhouseIngress = new k8s.networking.v1.Ingress("clickhouse-ingress", {
metadata: {
namespace: namespace.metadata.name,
name: "clickhouse-ingress",
annotations: {
"nginx.ingress.kubernetes.io/rewrite-target": "/",
},
},
spec: {
rules: [{
host: "clickhouse.example.com",
http: {
paths: [{
path: "/",
pathType: "Prefix",
backend: {
service: {
name: clickhouseService.metadata.name,
port: {
number: 8123,
},
},
},
}],
},
}],
},
});
// Export the Ingress URL
export const ingressUrl = clickhouseIngress.metadata.name.apply(name => `http://${name}.example.com`);
Summary
In this guide, we created a Kubernetes namespace, deployed a ClickHouse StatefulSet and Service, and set up an Ingress resource to expose the ClickHouse service. The Ingress resource routes HTTP traffic to the ClickHouse service, making it accessible via a specified host.
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