Deploy the postgrest helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy the PostgREST Helm chart on OpenShift, you’ll need to use the `kubernetes.helm.v3.Chart` resource from Pulumi's Kubernetes provider. This allows you to leverage Helm charts directly within your Pulumi program. Here's how you might use it:

1. Ensure that you've configured your Pulumi Kubernetes provider to point to the correct OpenShift cluster.
2. Use the `kubernetes.helm.v3.Chart` class to create a new Helm chart resource in your OpenShift cluster. When you instantiate this class, you will pass the specific chart and configuration that you want to deploy — in this case, PostgREST.

The following is a Pulumi program written in TypeScript that demonstrates how to deploy the PostgREST Helm chart on OpenShift. Make sure that you’re logged into your OpenShift cluster and that the Helm chart you intend to deploy is available in your Helm repository.

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

// Replace with the appropriate namespace, repo, and version
const namespace = 'default';
const repo = 'http://your-helm-repo/';
const chart = 'postgrest';
const chartVersion = 'version-number'; // Specify the chart version you want to deploy

const postgrestChart = new k8s.helm.v3.Chart('postgrest', {
    chart: chart,
    version: chartVersion,
    namespace: namespace,
    fetchOpts: {
        repo: repo,
    },
    // You can specify additional configuration here, e.g., set parameters or values
    // For example:
    // values: {
    //     config: {
    //         dbUri: 'YourDatabaseURI',
    //         // Other configuration parameters...
    //     },
    // },
}, { provider: /* the k8s provider pointing to your OpenShift cluster */ });

export const chartName = postgrestChart.name;
export const chartNamespace = postgrestChart.namespace;
```

In this program:

- We import the Kubernetes package from Pulumi which allows us to interact with Kubernetes resources.
- We define several constants that hold values like the namespace you want to deploy the chart into, the URL to your Helm repository, the name of the chart you want to deploy (`postgrest`), and the version of the chart.
- We instantiate a `Chart` resource, which represents the PostgREST Helm chart we want to deploy. In the `fetchOpts` property, we specify the repository where the Helm chart can be found.
- Optionally, in the `values` property, you may customize the Helm chart values to provide custom configuration to the PostgREST application.
- The `provider` option can be used if you need to specify a custom Kubernetes provider; for example, if you're dealing with multiple clusters or if your cluster's configuration isn't picked up from the default kubeconfig.
- We export the chart name and namespace to get easy access to these values from the Pulumi CLI after the deployment.

After running this Pulumi program, it will perform the equivalent of `helm install` for the PostgREST Helm chart into the OpenShift cluster you're connected to. With the values customized as needed, PostgREST will be configured according to your requirements.

Please ensure you have the required access permissions on your OpenShift cluster to deploy a Helm chart and that the PostgREST Helm chart is appropriately configured and available in your Helm repository.