Deploy the opscruise helm chart on AWS EKS

Question

Pulumi · Accepted Answer

To deploy the OpsCruise Helm chart on an AWS EKS cluster, we'll go through multiple steps. Firstly, we'll set up an AWS EKS cluster using Pulumi EKS component (`eks.Cluster`). Secondly, we'll integrate the Elastic Container Registry (ECR) with EKS using `aws.ecr.Repository` for storing Docker images. Lastly, we’ll use the Kubernetes provider with the `kubernetes.helm.v3.Chart` resource to deploy the OpsCruise Helm chart on the EKS cluster.

Here's what we'll need to do:

1. **EKS Cluster**: Create an EKS cluster with a specified node count and instance type.
2. **ECR Repository**: Set up an ECR repository.
3. **Identity Access Management (IAM)**: Configure IAM roles for EKS.
4. **Helm Chart Deployment**: Deploy OpsCruise using the Helm chart on our EKS cluster.

I'll provide a Pulumi program in TypeScript that encapsulates these steps. This program assumes that you have AWS credentials configured for Pulumi and `kubectl` configured to interact with Kubernetes clusters.

Here's the Pulumi program, which includes explanatory comments for each of the steps:

```typescript
import * as eks from "@pulumi/eks";
import * as aws from "@pulumi/aws";
import * as k8s from "@pulumi/kubernetes";

// Create an EKS cluster.
const cluster = new eks.Cluster("opsCruiseCluster", {
    desiredCapacity: 2,
    minSize: 1,
    maxSize: 3,
    instanceType: "t2.medium", // Change to a larger instance type as needed.
    providerCredentialOpts: {
        profileName: "aws-profile", // Ensure your AWS profile is configured in ~/.aws/credentials.
    },
});

// For storing container images, we will create an EKS repository.
const ecrRepository = new aws.ecr.Repository("opsCruiseEcrRepo");

// Create an IAM role and attach the AmazonEKSClusterPolicy.
const eksRole = new aws.iam.Role("eksRole", {
    assumeRolePolicy: aws.iam.assumeRolePolicyForPrincipal({
        Service: "eks.amazonaws.com",
    }),
});

new aws.iam.RolePolicyAttachment("eksPolicyAttachment", {
    role: eksRole,
    policyArn: aws.iam.ManagedPolicies.AmazonEKSClusterPolicy,
});

// Initialize a new k8s provider using the kubeconfig from our EKS cluster.
const provider = new k8s.Provider("k8sProvider", {
    kubeconfig: cluster.kubeconfig.apply(JSON.stringify),
});

// Deploy OpsCruise using a Helm Chart.
// This assumes that OpsCruise Helm chart is available in a public or configured private Helm repo.
const opsCruiseChart = new k8s.helm.v3.Chart("opsCruiseChart", {
    chart: "opscruise",
    version: "1.0.0", // Specify the version of the Helm chart.
    fetchOpts: {
        repo: "https://charts.opscruise.com/", // Adjust the Helm repo URL if necessary.
    },
    // You can specify the chart values as needed.
    // For example: 
    // values: {
    //     someKey: "someValue",
    //     anotherKey: "anotherValue",
    // },
}, { provider });

// Export the EKS cluster's kubeconfig and the ECR repository URL for use in deployment pipelines.
export const kubeconfig = cluster.kubeconfig;
export const ecrRepositoryUrl = ecrRepository.repositoryUrl;
```

**Explanation**:

1. **EKS Cluster Setup**: We utilized `eks.Cluster` to simplify the creation of our cluster. It handles the creation of the VPC and subnets, as well as the worker nodes.
2. **ECR Repository**: `aws.ecr.Repository` creates a Docker container registry where you can push images used by the Kubernetes pods. OpsCruise might use such a registry for private images.
3. **IAM Role**: An IAM role with the `AmazonEKSClusterPolicy` is established, which is needed for EKS to manage resources on your behalf.
4. **Helm Chart Deployment**: The Kubernetes provider (`k8s.Provider`) is being set up using the kubeconfig generated by the cluster, allowing the `k8s.helm.v3.Chart` resource to deploy charts into your cluster. In this case, it's assumed that OpsCruise has a Helm chart named `opscruise`, available at the specified repository URL. Replace `version` and `values` as necessary according to the OpsCruise Helm chart documentation.

**Action Items**:

1. Install Pulumi CLI and configure AWS credentials if you haven't already.
2. Configure `kubectl` to manage Kubernetes clusters.
3. Adjust the `instanceType`, `version`, `repo`, and `values` according to your requirements and the OpsCruise Helm chart documentation.
4. Run `pulumi up` to execute the Pulumi program.

Once the deployment is completed, the program will output the kubeconfig for the EKS cluster and the ECR repository URL, which can be used to interact with the cluster or push container images.