When you run two or more replicas per service, you are increasing the availability of the containerized service because you are not relying on a single pod to do all of the work. Furthermore, scaling horizontally by adding pods allows your service to scale and handle larger loads.
Targeted resources by this rule (types of kind): Deployment
Enabled by default? True
Policy as code identifier: DEPLOYMENT_INCORRECT_REPLICAS_VALUE
If the number of replicas is set to 1
Set numbers of replicas to be greater than 1