Using Kubernetes K8s.nginx.org With App.k8s.io

In this solution, we will use Pulumi to deploy an NGINX Ingress Controller on a Kubernetes cluster. We will utilize the k8s.nginx.org and app.k8s.io APIs to manage the deployment and configuration of the NGINX Ingress Controller. The key services involved in this solution are Kubernetes, NGINX Ingress Controller, and Pulumi.

Step-by-Step Explanation

1. Set up Pulumi and Kubernetes provider: Initialize a new Pulumi project and configure the Kubernetes provider to interact with your Kubernetes cluster.
2. Deploy NGINX Ingress Controller: Use the k8s.nginx.org API to deploy the NGINX Ingress Controller on your Kubernetes cluster.
3. Configure Ingress Resources: Create and configure Ingress resources using the k8s.nginx.org API to route traffic to your applications.
4. Manage Applications with app.k8s.io: Use the app.k8s.io API to manage and organize your applications within the Kubernetes cluster.

Key Points

• Pulumi allows for infrastructure as code, making it easier to manage and deploy resources.
• The NGINX Ingress Controller is a powerful tool for managing external access to services in a Kubernetes cluster.
• The k8s.nginx.org API provides a robust way to configure and manage NGINX Ingress resources.
• The app.k8s.io API helps in organizing and managing applications within the Kubernetes cluster.

Conclusion

By following this solution, you will be able to deploy and manage an NGINX Ingress Controller on your Kubernetes cluster using Pulumi. This approach leverages the power of infrastructure as code and the flexibility of Kubernetes APIs to provide a scalable and manageable solution for routing traffic to your applications.

Full Code Example

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

const namespace = new k8s.core.v1.Namespace("nginx-ingress", {
    metadata: { name: "nginx-ingress" }
});

const serviceAccount = new k8s.core.v1.ServiceAccount("nginx-ingress-service-account", {
    metadata: {
        namespace: namespace.metadata.name,
        name: "nginx-ingress-service-account"
    }
});

const clusterRole = new k8s.rbac.v1.ClusterRole("nginx-ingress-cluster-role", {
    metadata: { name: "nginx-ingress-cluster-role" },
    rules: [{
        apiGroups: [""],
        resources: ["configmaps", "endpoints", "nodes", "pods", "secrets", "services"],
        verbs: ["get", "list", "watch"]
    }, {
        apiGroups: [""],
        resources: ["nodes"],
        verbs: ["get"]
    }, {
        apiGroups: [""],
        resources: ["services"],
        resourceNames: ["kubernetes"],
        verbs: ["get"]
    }, {
        apiGroups: ["extensions"],
        resources: ["ingresses"],
        verbs: ["get", "list", "watch"]
    }]
});

const clusterRoleBinding = new k8s.rbac.v1.ClusterRoleBinding("nginx-ingress-cluster-role-binding", {
    metadata: { name: "nginx-ingress-cluster-role-binding" },
    subjects: [{
        kind: "ServiceAccount",
        name: serviceAccount.metadata.name,
        namespace: namespace.metadata.name
    }],
    roleRef: {
        kind: "ClusterRole",
        name: clusterRole.metadata.name,
        apiGroup: "rbac.authorization.k8s.io"
    }
});

const configMap = new k8s.core.v1.ConfigMap("nginx-ingress-controller-config-map", {
    metadata: {
        namespace: namespace.metadata.name,
        name: "nginx-ingress-controller-config-map"
    },
    data: {
        "enable-vts-status": "true"
    }
});

const deployment = new k8s.apps.v1.Deployment("nginx-ingress-controller-deployment", {
    metadata: {
        namespace: namespace.metadata.name,
        name: "nginx-ingress-controller"
    },
    spec: {
        replicas: 1,
        selector: {
            matchLabels: { app: "nginx-ingress" }
        },
        template: {
            metadata: {
                labels: { app: "nginx-ingress" }
            },
            spec: {
                serviceAccountName: serviceAccount.metadata.name,
                containers: [{
                    name: "nginx-ingress-controller",
                    image: "nginx/nginx-ingress:latest",
                    args: ["/nginx-ingress-controller"],
                    ports: [{ containerPort: 80 }],
                    env: [{
                        name: "POD_NAME",
                        valueFrom: {
                            fieldRef: { fieldPath: "metadata.name" }
                        }
                    }, {
                        name: "POD_NAMESPACE",
                        valueFrom: {
                            fieldRef: { fieldPath: "metadata.namespace" }
                        }
                    }]
                }]
            }
        }
    }
});

const service = new k8s.core.v1.Service("nginx-ingress-controller-service", {
    metadata: {
        namespace: namespace.metadata.name,
        name: "nginx-ingress-controller"
    },
    spec: {
        type: "LoadBalancer",
        selector: { app: "nginx-ingress" },
        ports: [{ port: 80, targetPort: 80 }]
    }
});

const ingress = new k8s.networking.v1.Ingress("nginx-ingress", {
    metadata: {
        namespace: namespace.metadata.name,
        name: "nginx-ingress"
    },
    spec: {
        rules: [{
            host: "example.com",
            http: {
                paths: [{
                    path: "/",
                    pathType: "Prefix",
                    backend: {
                        service: {
                            name: service.metadata.name,
                            port: { number: 80 }
                        }
                    }
                }]
            }
        }]
    }
});

export const nginxIngressService = service.metadata.name;
export const nginxIngressDeployment = deployment.metadata.name;
export const nginxIngressIngress = ingress.metadata.name;