1. Deploy the svc-postgres helm chart on Azure Kubernetes Service (AKS)


    To deploy a Helm chart for PostgreSQL on an Azure Kubernetes Service (AKS) cluster using Pulumi, you will primarily need the following:

    1. An AKS cluster where you will deploy the Helm chart.
    2. The Helm chart package, which includes the files necessary to deploy PostgreSQL in your Kubernetes cluster.

    First, you'll create the AKS cluster using the azure-native resources. Next, you will deploy the Helm chart to the AKS cluster using the kubernetes package, which allows you to work with Helm charts. In this program, we will assume that you have already set up the necessary Helm repository that contains the svc-postgres chart.

    Below is a detailed Pulumi program written in TypeScript that accomplishes this:

    import * as pulumi from "@pulumi/pulumi"; import * as azure_native from "@pulumi/azure-native"; import * as azuread from "@pulumi/azuread"; import * as kubernetes from "@pulumi/kubernetes"; import * as random from "@pulumi/random"; // A random password for the PostgreSQL Helm chart const password = new random.RandomPassword("password", { length: 12, }); // Create an Azure Resource Group const resourceGroup = new azure_native.resources.ResourceGroup("myResourceGroup"); // Create an Azure AD application for AKS const app = new azuread.Application("aks"); // Create a Service Principal for the application const servicePrincipal = new azuread.ServicePrincipal("aksSp", { applicationId: app.applicationId }); // Create the Service Principal Password const spPassword = new azuread.ServicePrincipalPassword("aksSpPassword", { servicePrincipalId: servicePrincipal.id, value: password.result, endDate: "2099-01-01T00:00:00Z", }); // Create the AKS cluster const cluster = new azure_native.containerservice.ManagedCluster("myAKSCluster", { resourceGroupName: resourceGroup.name, agentPoolProfiles: [{ count: 1, maxPods: 110, mode: "System", name: "agentpool", osDiskSizeGB: 30, osType: "Linux", vmSize: "Standard_DS2_v2", }], dnsPrefix: "myakscluster", linuxProfile: { adminUsername: "adminuser", ssh: { publicKeys: [{ keyData: "ssh-rsa ...", }], }, }, servicePrincipalProfile: { clientId: app.applicationId, secret: spPassword.value, }, kubernetesVersion: "1.18.14", }); // Export the kubeconfig export const kubeconfig = pulumi.all([cluster.name, resourceGroup.name]).apply(([clusterName, rgName]) => { return azure_native.containerservice.listManagedClusterUserCredentials({ resourceGroupName: rgName, resourceName: clusterName, }); }).apply(creds => { const encoded = creds.kubeconfigs[0].value; return Buffer.from(encoded, 'base64').toString(); }); // Create a Kubernetes Provider pointing to the AKS cluster const k8sProvider = new kubernetes.Provider("k8sProvider", { kubeconfig: kubeconfig, }); // Deploy the svc-postgres Helm chart const postgresChart = new kubernetes.helm.v3.Chart("postgres", { chart: "svc-postgres", version: "1.0.0", fetchOpts: { repo: "http://charts.my-company.com/", }, values: { postgresqlUsername: "postgres", postgresqlPassword: password.result, persistence: { size: "8Gi", }, }, }, { provider: k8sProvider }); // Export the PostgreSQL Service endpoint export const postgresqlEndpoint = postgresChart.getResourceProperty("v1/Service", "postgres-postgresql", "status").apply(status => status.loadBalancer.ingress[0].ip);


    • Password Generation: The program begins by generating a random password for the database. This is required because PostgreSQL Helm charts usually require defining a password for the PostgreSQL admin account upon deployment.

    • Azure Resource Group: It creates a new Azure resource group to contain all the resources, including the AKS cluster.

    • Azure AD Application and Service Principal: For AKS to manage resources in Azure on your behalf, it needs an identity. This is set up by creating an Azure Active Directory (AD) application and a corresponding service principal.

    • AKS Cluster Creation: It creates a new AKS cluster in the created resource group with a single node in the agent pool, using a Linux-based virtual machine.

    • Export kubeconfig: The kubeconfig needed to interact with the cluster is retrieved and exported (you would need to mask the sensitive components in a production environment).

    • Kubernetes Provider: A Pulumi Kubernetes provider instance is created, which allows Pulumi to interact with the Kubernetes cluster.

    • Deployment of Postgres Helm Chart: Here, Pulumi deploys the svc-postgres Helm chart (you should have this chart available in the referred Helm repo). It sets values for postgresqlUsername and postgresqlPassword based on Helm chart custom values for PostgreSQL.

    • Export PostgreSQL Service Endpoint: Once the Postgres service is up and running, it exports the database service endpoint, which can be used to connect to the PostgreSQL instance.

    Carefully replace the SSH public key data and repository URL with the appropriate values for your configuration. This program sets up everything for deployment, but you need to configure Azure credentials for Pulumi, which is already assumed to be in place.