Deploy the promtail-mixin helm chart on Opensshift

Question

Pulumi · Accepted Answer

To deploy the `promtail-mixin` Helm chart on OpenShift using Pulumi, you'll need to create a Pulumi program that leverages the `@pulumi/kubernetes` package to interact with your OpenShift cluster.

Promtail is an agent which ships the contents of local logs to a private Grafana Loki instance or Grafana Cloud. It is usually deployed to every machine that has applications needed to be monitored.

Let's break down the steps you need to take:

1. **Set up a new Pulumi project**: First, you'll need to create a new Pulumi project if you don't already have one. This can be done by running `pulumi new` in your terminal and selecting the appropriate template.

2. **Install dependencies**: In your Pulumi project, install the necessary dependencies which are the Pulumi Kubernetes SDK. You can do this by running `npm install @pulumi/kubernetes`.

3. **Create the Pulumi Stack**: In your TypeScript file (usually `index.ts`), you will import the Pulumi Kubernetes SDK, and then create a Kubernetes `Chart` resource, which represents the `promtail-mixin` Helm chart.

4. **Deploy the chart**: Fill in the necessary information like the path or HTTP location of your chart, any values to override in the chart's `values.yaml` file, and the namespace where you want the resources to be deployed.

Below is a Pulumi program written in TypeScript that deploys the `promtail-mixin` Helm chart to OpenShift. Note that you will need to replace `CHART_REPO_URL` with the actual chart repository URL and provide any specific configuration needed by `promtail-mixin` through the `values` property.

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

// Create an OpenShift provider instance using the kubernetes provider. If you're running this outside
// of where kubectl is set up, you might need to pass the kubeconfig explicitly.
const provider = new k8s.Provider("openshift", { /* kubeconfig: YOUR_KUBECONFIG_HERE */ });

// Deploy promtail-mixin Helm chart using the Kubernetes provider.
const promtailMixinChart = new k8s.helm.v3.Chart("promtail-mixin", {
    chart: "promtail-mixin",
    version: "CHART_VERSION", // Replace with the desired chart version
    fetchOpts: {
        repo: "CHART_REPO_URL", // Replace with the Helm repository URL hosting the promtail-mixin chart
    },
    values: {
        // ... your custom values ...
    },
    namespace: "default", // Specify the namespace where you want to deploy the chart
}, { provider: provider });

// Export the resources created
export const chartName = promtailMixinChart.metadata.apply(m => m.name);
```

In this program:

- We import the Kubernetes package from Pulumi, which allows us to create Kubernetes resources.
- We instantiate a Pulumi Kubernetes `Provider` to interact with our OpenShift cluster. Depending on your setup, you might need to configure the provider with explicit credentials.
- We use the `Chart` resource from the Pulumi Kubernetes package to deploy the `promtail-mixin` Helm chart. We specify the chart name, version, and repository URL. Replace `CHART_VERSION` and `CHART_REPO_URL` with the correct values for your use case.
- We define any overrides for our Helm chart in the `values` property as needed.
- We specify the namespace to deploy our Helm chart to, which defaults to `default` in this case.
- Finally, we export the name of the chart for easy access to its details after deployment.

You need to make sure that Helm is set up properly in your environment and that the specified Helm chart version and repository URL are correct.

To apply this program:
- Ensure you have Pulumi and OpenShift `oc` CLI installed and configured.
- Navigate to the Pulumi project directory.
- Run `pulumi up` to deploy the resources defined in the program. This will prompt for confirmation before proceeding.

After running `pulumi up`, the resources needed for `promtail-mixin` to operate will be created on your OpenShift cluster.