How do I deploy Keycloak and NATS on Kubernetes?
In this guide, we will deploy Keycloak and NATS on a Kubernetes cluster using Pulumi. Keycloak is an open-source Identity and Access Management solution, while NATS is a high-performance messaging system. We will define Kubernetes resources for both applications and deploy them to the cluster.
Keycloak and NATS Deployment on Kubernetes
import * as pulumi from "@pulumi/pulumi";
import * as k8s from "@pulumi/kubernetes";
// Define the namespace
const namespace = new k8s.core.v1.Namespace("keycloak-nats-ns", {
metadata: {
name: "keycloak-nats",
},
});
// Deploy NATS
const natsDeployment = new k8s.apps.v1.Deployment("nats-deployment", {
metadata: {
namespace: namespace.metadata.name,
},
spec: {
selector: { matchLabels: { app: "nats" } },
replicas: 1,
template: {
metadata: { labels: { app: "nats" } },
spec: {
containers: [{
name: "nats",
image: "nats:latest",
ports: [{ containerPort: 4222 }],
}],
},
},
},
});
const natsService = new k8s.core.v1.Service("nats-service", {
metadata: {
namespace: namespace.metadata.name,
labels: natsDeployment.spec.template.metadata.labels,
},
spec: {
ports: [{ port: 4222, targetPort: 4222 }],
selector: natsDeployment.spec.template.metadata.labels,
},
});
// Deploy Keycloak
const keycloakDeployment = new k8s.apps.v1.Deployment("keycloak-deployment", {
metadata: {
namespace: namespace.metadata.name,
},
spec: {
selector: { matchLabels: { app: "keycloak" } },
replicas: 1,
template: {
metadata: { labels: { app: "keycloak" } },
spec: {
containers: [{
name: "keycloak",
image: "jboss/keycloak:latest",
ports: [{ containerPort: 8080 }],
env: [
{ name: "DB_VENDOR", value: "h2" },
{ name: "KEYCLOAK_USER", value: "admin" },
{ name: "KEYCLOAK_PASSWORD", value: "admin" },
],
}],
},
},
},
});
const keycloakService = new k8s.core.v1.Service("keycloak-service", {
metadata: {
namespace: namespace.metadata.name,
labels: keycloakDeployment.spec.template.metadata.labels,
},
spec: {
ports: [{ port: 8080, targetPort: 8080 }],
selector: keycloakDeployment.spec.template.metadata.labels,
type: "LoadBalancer",
},
});
// Export the URLs for accessing Keycloak and NATS
export const natsServiceUrl = pulumi.interpolate`http://${natsService.metadata.name}.${namespace.metadata.name}.svc.cluster.local:4222`;
export const keycloakServiceUrl = pulumi.interpolate`http://${keycloakService.status.loadBalancer.ingress[0].ip}:8080`;
Key Points
- We created a Kubernetes namespace for organizing the resources.
- We deployed NATS using a Kubernetes Deployment and exposed it with a Service.
- We deployed Keycloak using a Kubernetes Deployment and exposed it with a LoadBalancer Service.
- We exported the URLs for accessing Keycloak and NATS.
Summary
In this guide, we deployed Keycloak and NATS on a Kubernetes cluster using Pulumi. We defined the necessary Kubernetes resources and exposed the services to be accessible. This setup provides a basic deployment of Keycloak and NATS, suitable for development and testing environments.
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