# Alerts

## What You Will Do

This is Part 1 of a multi-part, self-paced quick start exercise. In this part, you will create a custom blueprint and apply it on your cluster. Next you will simulate an error condition on your cluster to see how the platform monitors, generates and centrally aggregates alerts.

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## Step 1: Create Blueprint

- Navigate to the project in your Org where the cluster is located.
- Select Infrastructure -> Blueprint -> New Blueprint

- Name appropriately -> click Save

- Choose the appropriate option show in below screenshot.

- Scroll down to go to "Managed System Add-Ons" Section

- Select the check box "Monitoring & Alerting" -> click "Save Changes"

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## Step 2: Apply Blueprint to the cluster

- Go back to Infrastructure -> Cluster and click the gear icon on the right side of the page -> Click "Update Blueprint"

- Select the newly created blueprint "alertmanager-blueprint" and version -> click "Save and Publish"

- Wait for the alertmanager-blueprint to sync

- Observe no Alerts

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## Step 3: Simulate a Failure Condition

- Go to Application -> Workloads -> Click on " New Workload" -> Select "Create New Workload"

- Choose appropriate name and select options as shown in screenshot below -> Click " Continue" to go to the Upload Tab

- On the Upload Tab -> click " Choose File"

- Upload the yaml below yaml file and click -> " Save And Go To Placement"

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```
  apiVersion: apps/v1
  kind: Deployment
  metadata:
    name: nginx-deployment
  spec:
    selector:
      matchLabels:
        app: nginx
    replicas: 2 # tells deployment to run 2 pods matching the template
    template:
      metadata:
        labels:
          app: nginx
      spec:
        containers:
        - name: nginx
          image: nginx-error:1.14.2
          ports:
          - containerPort: 80
```

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- On the Placement tab -> Select the Checkbox with cluster name -> Click " Save and Go To Publish" -> then Click " Publish"

In a few minutes, the "visibility and monitoring" add-on deployed on the cluster by the platform will automatically detect the error condition and generate an alert.
- Go back to Infrastructure -> Cluster, Click -> "Alerts" to check the Alerts:

Important

Alerts will be automatically cleared by the platform if it determines that the error condition is not detected anymore.

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## Recap

Congratulations! At this point, you have successfully simulated an error condition with a workload on your managed cluster and used the platform to centrally monitor and aggregate the alerts.