## Custom Kubernetes controller for managing CloudWatch alarms

Kubernetes Operator implemented using <a href="https://github.com/kubernetes-client/java">Kubernetes Java SDK</a>. This operator packages a custom resource named **K8sMetricAlarm** defined by a CustomResourceDefinition, a custom controller implemented as a Deployment, which responds to events in the Kubernetes cluster pertaining to add/update/delete actions on the K8sMetricAlarm custom resource, and Role/RoleBinding resources to grant necessary permissions to the custom controller. The customer controller runs under the identity of a Kubernetes service account which is associated with an IAM role that has permissions to manages resources in CloudWatch

## Build Requirements

<ul>
  <li><a href="https://www.oracle.com/java/technologies/javase/javase-jdk8-downloads.html">Java SE Development Kit 8</a></li>
  <li><a href="https://maven.apache.org/download.cgi">Apache Maven 3.6.2</a></li>
  <li><a href="https://www.docker.com/products/container-runtime">Docker 19.03</a></li>
</ul>

## Build Instructions

To build the JAR file, type <b>mvn clean</b> followed by <b>mvn package</b> at the command line. 

To build the Docker image, use the <b>build-K8s.sh</b> script under the **docker-build** folder. Be sure to modify the <b>TARGET_IMG</b> variable to point to your repository in a Docker image registry.