Errors running Dockerfile with Kubernetes

[daudn]

I am having trouble using this docker image so thought I'd post some of the errors that I can't quite understand.

1. Metrics
   I first get this error:
   not enough metrics to calculate new size, required at least 0.75 was 0.00 metrics ratio
   Then it changed to:
   not enough metrics to calculate new size, required at least 0.75 was 0.42 metrics ratio
   My question is: what is metrics referring to? No. of items in the queue?

2. ServiceAccount
   deployments.apps "<name-of-app-being-scaled" is forbidden: User "system:serviceaccount:default:default" cannot get deployments.apps in the namespace "default"
   ---> Is this an error due to 'roles' possible?

3. Dial TCP i/o timeout
   Sometimes I get:
   Failed to get queue length for queue : dial tcp :5672: i/o timeout

I want to be able to create replicas of pods based on no. of msgs in the queue.

So, essentially, no. of msgs in queue == no. of replicas of

Kindly give me some direction as to what could be the problem?