Deploy the processmaker helm chart on Kubernetes

Question

Pulumi · Accepted Answer

To deploy the ProcessMaker helm chart on a Kubernetes cluster with Pulumi, you'll be essentially scripting the equivalent of what you might do with the `helm` CLI tool, but with the advantages of infrastructure as code (IaC) practices, such as versioning, code reviews, and CI/CD integrations.

Below is a Pulumi program written in TypeScript that accomplishes this task. The program uses the `@pulumi/kubernetes` package which allows you to describe Kubernetes resources in a declarative manner using TypeScript. We will utilize the `Chart` resource which is a component of the Pulumi Kubernetes provider to deploy the helm chart.

Here's what the program will do:
1. Import the necessary Pulumi and Kubernetes packages.
2. Use the `Chart` resource to install the ProcessMaker helm chart into our Kubernetes cluster.

Before you can apply this Pulumi code, you will need a Kubernetes cluster and configure your local `kubectl` to connect to it. We are also assuming that you have already logged into your Pulumi account and set up the Pulumi CLI.

Here's the detailed Pulumi program to deploy the ProcessMaker helm chart on Kubernetes:

```typescript
import * as k8s from '@pulumi/kubernetes';

// Define the settings for the ProcessMaker Helm chart.
const processMakerChart = new k8s.helm.v3.Chart('processmaker', {
    // Replace with the correct repo URL or name if needed.
    repo: 'processmaker',
    chart: 'processmaker',
    version: '4.0.0', // Use the correct chart version.
    values: {
        // Define any values that you would like to override.
        // For example, you can specify the number of replicas, resource limits, etc.
        // This is analogous to the 'values.yaml' file used by Helm charts.
        // Below is just a placeholder, you will need to put actual configuration keys and values.
        /* 
        replicaCount: 2,
        image: {
           repository: 'processmaker/pmio',
           tag: 'latest',
           pullPolicy: 'IfNotPresent'
        },
        service: {
            type: 'ClusterIP',
            port: 80
        },
        */
    },
    namespace: 'default', // Specify the namespace where the chart should be deployed.
    // If you need to add any extra transformations or configurations, you can add them here.
});

// Export the URL or any other outputs you might need after the deployment.
// For instance, if your ProcessMaker deployment creates a LoadBalancer service,
// you might want to export the LoadBalancer's IP or hostname to access ProcessMaker.
export const processMakerUrl = processMakerChart.getResourceProperty('v1/Service', 'processmaker-service', 'status').apply(status => `http://${status.loadBalancer.ingress[0].hostname}`);

```

In the above code, `processmaker` refers to the name of the Helm chart for ProcessMaker, and `4.0.0` should be replaced with the version of the ProcessMaker Helm chart that you intend to deploy. Also, you would need to adjust the `values` field with the desired configurations for your ProcessMaker instance. These configurations are equivalent to what you'd specify in a `values.yaml` file when using Helm directly.

Please replace placeholder comments with actual configuration values based on your ProcessMaker chart's requirements.

After saving this TypeScript code to a file (e.g., `index.ts`), you can run the following commands in the terminal to deploy the chart to your Kubernetes cluster:

```shell
# Install the Pulumi CLI if you haven't already.
$ curl -fsSL https://get.pulumi.com | sh

# Log in to the Pulumi service.
$ pulumi login

# Create a new Pulumi stack (equivalent to an environment).
$ pulumi stack init [stack-name]

# Review the plan to see what resources will be created.
$ pulumi preview

# Deploy the resources to the cluster.
$ pulumi up
```

Make sure to replace `[stack-name]` with a name that you want to give to your deployment environment.

After running `pulumi up`, you should see the resources being created in the command line output. Once it's complete, the URL to access the ProcessMaker instance should be exported as a stack output, assuming your service type creates an external endpoint. If not, you might need to inspect your cluster to find the correct endpoint.