Deploy the gitea-instance helm chart on Azure Kubernetes Service (AKS)

Question

Pulumi · Accepted Answer

To deploy the Gitea instance using a Helm chart on Azure Kubernetes Service (AKS), we'll need to follow these steps:

1. **Set up an AKS cluster**: We need a Kubernetes cluster running on AKS. This cluster will be the environment where Gitea is deployed.
2. **Install Helm**: Helm is a package manager for Kubernetes, which allows us to define, install, and upgrade applications using Helm Charts. The Gitea Helm chart is a pre-packaged set of resources that define the Gitea application.
3. **Deploy the Gitea Helm chart**: Once Helm is set up and we have access to the AKS cluster, we can deploy the Gitea instance using the Helm chart.

We will use the Pulumi `azure-native` provider to create the AKS cluster and the `kubernetes` provider to install the Helm chart on the cluster.

Here's the TypeScript program that accomplishes these tasks:

```typescript
import * as pulumi from "@pulumi/pulumi";
import * as azure_native from "@pulumi/azure-native";
import * as kubernetes from "@pulumi/kubernetes";
import * as azuread from "@pulumi/azuread";

// Create an Azure Resource Group
const resourceGroup = new azure_native.resources.ResourceGroup("resourceGroup");

// Set up an AKS cluster
const managedCluster = new azure_native.containerservice.ManagedCluster("myAksCluster", {
    resourceGroupName: resourceGroup.name,
    // Specify other necessary properties like agentPoolProfiles, dnsPrefix, etc.
});

// Fetch the kubeconfig from the generated AKS cluster
const creds = pulumi.all([resourceGroup.name, managedCluster.name]).apply(([rgName, clusterName]) => 
    azure_native.containerservice.listManagedClusterUserCredentials({
        resourceGroupName: rgName,
        resourceName: clusterName,
    })
);

// Extract the kubeconfig from the credentials result
const kubeconfig = creds.apply(c => Buffer.from(c.kubeconfigs[0].value, "base64").toString());

// Provide the kubeconfig to the Kubernetes provider
const k8sProvider = new kubernetes.Provider("k8sProvider", {
    kubeconfig: kubeconfig,
});

// Deploy the Gitea Helm chart
const giteaChart = new kubernetes.helm.v3.Chart("gitea", {
    chart: "gitea",
    version: "x.y.z", // Use the correct Gitea chart version
    fetchOpts:{
        // If the Gitea chart is in a Helm repository, provide the repository URL
        repo: "https://helm.gitea.io/",
    },
}, { provider: k8sProvider });

// Export the cluster name and kubeconfig
export const clusterName = managedCluster.name;
export const kubeconfigFile = pulumi.secret(kubeconfig);
```

In the program above, we take the following steps:

- **Resource Group**: We create an Azure Resource Group, which is a container that holds related resources for an Azure solution.

- **Kubernetes Cluster**: We create an AKS cluster with the necessary configurations. You will need to set properties for `agentPoolProfiles`, `dnsPrefix`, and other necessary configurations according to your requirements.

- **Credentials**: We retrieve the credentials for the AKS cluster, including the Kubernetes configuration required to communicate with the AKS cluster.

- **Kubernetes Provider**: We provide Pulumi with the kubeconfig so it can communicate with the AKS cluster to deploy Kubernetes resources.

- **Helm Chart**: We use the Helm provider to deploy the Gitea chart. Replace `"x.y.z"` with the correct Helm chart version for Gitea. The repository URL is specified to point to the Gitea Helm repository.

- **Outputs**: Finally, we export the cluster name and kubeconfig as outputs from the program.

Before running this Pulumi program, you need to have Pulumi CLI installed and configured with Azure credentials. When you run `pulumi up`, Pulumi will perform all the above steps, creating the AKS cluster and deploying Gitea onto it.

Note: Always ensure Helm charts and versions used are from trusted sources and they are secured adequately for your environment before deploying to production. The `"x.y.z"` placeholder should be replaced with the actual version of the Gitea Helm chart you wish to deploy.