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terraform-aws-observability…/docs/eks/multicluster.md
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Co-authored-by: Ela AWS <51791117+elamaran11@users.noreply.github.com>
Co-authored-by: Elamaran Shanmugam <elamaran.shan@gmail.com>
2023-06-12 18:00:42 +02:00

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# AWS EKS Multicluster Observability
This example shows how to use the [AWS Observability Accelerator](https://github.com/aws-observability/terraform-aws-observability-accelerator), with more than one EKS cluster and verify the collected metrics from all the clusters in the dashboards of a common `Amazon Managed Grafana` workspace.
## Prerequisites
#### 1. EKS clusters
Using the example [eks-cluster-with-vpc](https://aws-observability.github.io/terraform-aws-observability-accelerator/helpers/new-eks-cluster/), create two EKS clusters with the names:
1. `eks-cluster-1`
2. `eks-cluster-2`
#### 2. Amazon Managed Service for Prometheus (AMP) workspace
We recommend that you create a new AMP workspace. To do that you can run the following command.
Ensure you have the following necessary IAM permissions
* `aps.CreateWorkspace`
```sh
export TF_VAR_managed_prometheus_workspace_id=$(aws amp create-workspace --alias observability-accelerator --query='workspaceId' --output text)
```
#### 3. Amazon Managed Grafana (AMG) workspace
To run this example you need an AMG workspace. If you have
an existing workspace, create an environment variable as described below.
To create a new workspace, visit our supporting example for managed Grafana.
!!! note
For the URL `https://g-xyz.grafana-workspace.eu-central-1.amazonaws.com`, the workspace ID would be `g-xyz`
```sh
export TF_VAR_managed_grafana_workspace_id=g-xxx
```
#### 4. Grafana API Key
AMG provides a control plane API for generating Grafana API keys.
As a security best practice, we will provide to Terraform a short lived API key to
run the `apply` or `destroy` command.
Ensure you have the following necessary IAM permissions
* `grafana.CreateWorkspaceApiKey`
* `grafana.DeleteWorkspaceApiKey`
```sh
export TF_VAR_grafana_api_key=`aws grafana create-workspace-api-key --key-name "observability-accelerator-$(date +%s)" --key-role ADMIN --seconds-to-live 7200 --workspace-id $TF_VAR_managed_grafana_workspace_id --query key --output text`
```
## Setup
#### 1. Download sources and initialize Terraform
```sh
git clone https://github.com/aws-observability/terraform-aws-observability-accelerator.git
cd terraform-aws-observability-accelerator/examples/eks-multicluster
terraform init
```
#### 2. Deploy
Verify by looking at the file `variables.tf` that there are two EKS clusters targeted for deployment by the names/ids:
1. `eks-cluster-1`
2. `eks-cluster-2`
The difference in deployment between these clusters is that Terraform, when setting up the EKS cluster behind variable `eks_cluster_1_id` for observability, also sets up:
* Dashboard folder and files in Amazon Managed Grafana
* Prometheus and Java, alerting and recording rules in Amazon Managed Service for Prometheus
!!! warning
To override the defaults, create a `terraform.tfvars` and change the default values of the variables.
Run the following command to deploy
```sh
terraform apply --auto-approve
```
## Verifying Multicluster Observability
One you have successfully run the above setup, you should be able to see dashboards similar to the images shown below in `Amazon Managed Grafana` workspace.
Note how you are able to use the `cluster` dropdown to filter the dashboards to metrics collected from a specific EKS cluster.
<img width="2557" alt="eks-multicluster-1" src="https://user-images.githubusercontent.com/4762573/233949110-ce275d06-7ad8-494c-b527-d9c2a0fb6645.png">
<img width="2560" alt="eks-multicluster-2" src="https://user-images.githubusercontent.com/4762573/233949227-f401f81e-e0d6-4242-96ad-0bcd39ad4e2d.png">
## Cleanup
To clean up entirely, run the following command:
```sh
terraform destroy --auto-approve
```