Using kubernetes mindbody.com with operators.coreos.com

Question

Pulumi · Accepted Answer

In order to deploy a Kubernetes Operator from Operator Lifecycle Manager (OLM) through Pulumi, you will need to interact with Kubernetes Custom Resource Definitions (CRDs) as well as Custom Resources (CRs). These are the Kubernetes resources responsible for defining and controlling the operators provided by OLM.

Here's a step-by-step explanation followed by a TypeScript program to accomplish this:

1. **Set up the Kubernetes Provider**: Ensure that the Kubernetes provider is set up to interact with your Kubernetes cluster.
2. **Install OLM**: Operators are managed by the Operator Lifecycle Manager. If it's not already installed in your cluster, you need to install it.
3. **Create a Subscription**: A Subscription CR tells OLM where to find an operator’s packages and which channel to track. The channel helps determine the version of the operator to be installed.
4. **Create an OperatorGroup**: OperatorGroups are OLM resources that provide multitenant configuration to operators. They define the set of namespaces where the operator will work.
5. **Check the Operator Status**: Before deploying resources managed by the operator, ensure that the operator installation is complete and successful.

Here's an example program that demonstrates how to set up a Subscription and an OperatorGroup for an operator available on OperatorHub.io. This program does not target a specific operator for `mindbody.com` or `operators.coreos.com`, as those might not refer to actual Kubernetes operators. Instead, I'll provide an example setup for a generic operator.

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

// Create a new kubernetes provider to interact with the cluster. Ensure that you have the kubeconfig file setup for this.
const provider = new k8s.Provider("provider", {
    kubeconfig: process.env.KUBECONFIG, // Use the KUBECONFIG environment variable.
});

// Suppose you want to install an operator named "example-operator" in the "operators" namespace
const namespace = new k8s.core.v1.Namespace("operators-ns", {
    metadata: { name: "operators" },
}, { provider: provider });

// Create the OperatorGroup.

const operatorGroup = new k8s.apiextensions.CustomResource("operatorGroup", {
    apiVersion: "operators.coreos.com/v1",
    kind: "OperatorGroup",
    metadata: {
        name: "example-operator-group",
        namespace: namespace.metadata.name,
    },
    spec: {
        targetNamespaces: [namespace.metadata.name],
    },
}, { provider: provider, dependsOn: namespace });

// Create the Subscription to the operator.

const operatorSubscription = new k8s.apiextensions.CustomResource("operatorSubscription", {
    apiVersion: "operators.coreos.com/v1alpha1",
    kind: "Subscription",
    metadata: {
        name: "example-operator-sub",
        namespace: namespace.metadata.name,
    },
    spec: {
        channel: "stable", // Replace with the correct channel for your operator.
        name: "example-operator", // Replace with the exact name of the desired operator.
        source: "operatorhubio-catalog", // OperatorHub Catalog Source.
        sourceNamespace: "olm", // Namespace where Catalog Source is located.
    },
}, { provider: provider, dependsOn: operatorGroup });

// Export the namespace and subscription name.

export const operatorNamespace = namespace.metadata.name;
export const subscriptionName = operatorSubscription.metadata.name;
```

This program sets the namespace for operators and creates two Kubernetes Custom Resources—`OperatorGroup` and `Subscription`, which are essential for the installation and management of an Operator using OLM. You would need to replace `"example-operator"` with the appropriate operator name, and `"stable"` with the correct subscription channel for your operator.

Additionally, this assumes the `operatorhubio-catalog` is accessible within your cluster in the `olm` namespace which is typically set up when installing OLM. If your operator is coming from a different catalog or channel, adjust the `source`, `sourceNamespace`, and `channel` fields as necessary.

In a real-world scenario, specific versions of the Operator and additional configuration might be needed for an operator tailored for mindbody.com or other domain-specific purposes. This would also typically require understanding the CRDs the operator uses and creating instances of those CRs to manage your services effectively.