1. Using kubernetes helm.sh with kubegres.reactive-tech.io

    TypeScript

    To deploy a Helm chart in a Kubernetes cluster using Pulumi, you will need to have access to a Kubernetes cluster and have your kubeconfig file pointing to it. The Helm chart for Kubegres is used for deploying a Postgres cluster on Kubernetes, managed by Kubegres, which is a custom resource controller.

    Here I'll guide you through the process using Pulumi's Kubernetes provider to deploy Kubegres to your cluster.

    First, we'll use the kubernetes.helm.sh/v3.Chart resource. This Pulumi resource represents a Helm chart, and deploying a Helm chart via Pulumi is similar to using helm install or helm upgrade. You specify the name of the chart, the version, and any custom values you want to pass to the Helm chart. Pulumi will handle the rest, including track resource changes and perform updates and rollbacks as necessary.

    Let's get started with the program in TypeScript:

    import * as kubernetes from '@pulumi/kubernetes'; // Kubegres Helm Chart settings const kubegresChart = new kubernetes.helm.v3.Chart('kubegres', { chart: 'kubegres', // The name of the chart version: '1.3.1', // Specify the version of the chart you want to deploy fetchOpts: { repo: 'https://reactive-tech.io/kubegres/helm/', // Helm repository where Kubegres is located }, values: { // You can customize the values here according to your needs. // These are just placeholders to illustrate customization. // Refer to the helm chart values or official documentation // for accurate configuration options. replicaCount: 3, postgres: { volume: { size: "1Gi", } } }, }); // Export the external IP for the kubegres service endpoint export const kubegresExternalIp = kubegresChart.getResourceProperty( 'v1/Service', 'kubegres', // This should match the service name deployed by the Kubegres Helm chart 'status' ).apply(status => status.loadBalancer.ingress[0]?.ip);

    In the above program:

    • We import the Pulumi Kubernetes package.
    • We declare a Helm chart resource for Kubegres with required parameters, such as the chart name, version, repository, and additional custom values according to the Kubegres Helm chart's values.yaml. These values are used to configure the Postgres cluster to our specific needs. Adjust these values according to the official Kubegres Helm chart specification for more complex configurations.
    • We export a property of the service created by the Kubegres Helm chart, specifically, the external IP address assigned to the service. This allows you to connect to your Postgres cluster externally, if the service type is LoadBalancer and your Kubernetes cluster supports it. Make sure to verify the service name in the Kubegres Helm chart and update the string 'kubegres' if it's different.

    Before running this Pulumi program, make sure you have:

    1. Installed Pulumi CLI and set up your Pulumi account.
    2. Installed and set up kubectl with the context of your Kubernetes cluster.
    3. Access to the Kubernetes cluster where you want to deploy Kubegres.

    Once you have those prerequisites met, you can run the Pulumi program using your terminal:

    pulumi up

    This command will start the Pulumi deployment process. Pulumi will show you a preview of the resources that will be created and will ask for your confirmation before proceeding. Once you confirm, Pulumi will apply the changes to your cluster and output the exported external IP once it's available.

    Please note that this is a basic example. In a production setup, you should ensure that your Kubegres instances are properly secured and configured according to your organization's policies and practices. Also, managing database state and persistent data requires careful consideration in the context of Kubernetes.

    For more information about configurable options for the Kubegres Helm chart, consult the official documentation.


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