k8s-sqs-hpa-controller

Introduction

k8s-sqs-hpa-controller autoscales a kubernetes horizontal pod autoscaler(HPA) based on AWS SQS. It periodically fetch the number of messages in SQS queue and update HPA's minimum replicas accordingly.

Usage

Sample Kubernetes manifests are available in the deploy directory. sqs:GetQueueAttributes permission is required to your IAM Access Keys.

The folloing is an example IAM permission.

{
    "Version": "2012-10-17",
    "Statement": [{
        "Effect": "Allow",
        "Action": "sqs:GetQueueAttributes",
        "Resource": "*"
    }]
}

And here's an example deployment you shold apply.

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    run: k8s-sqs-hpa-controller
  name: k8s-sqs-hpa-controller
  namespace: kube-system
spec:
  replicas: 1
  selector:
    matchLabels:
      run: k8s-sqs-hpa-controller
  template:
    metadata:
      labels:
        run: k8s-sqs-hpa-controller
    spec:
      serviceAccountName: k8s-sqs-hpa-controller
      containers:
      - image: rossy4613/k8s-sqs-hpa-controller:latest
        name: k8s-sqs-hpa-controller
        args:
          - --poll-interval=10s
          - --min-hpa=1
          - --target='{"queue-url":"sample1", "hpa-name":"hpa1","namespace":"default"}'
          - --target='{"queue-url":"sample2", "hpa-name":"hpa2","namespace":"default"}'
        env:
          - name: AWS_REGION
            value: ap-northeast-1
          - name: AWS_ACCESS_KEY_ID
            value: <your_key>
          - name: AWS_SECRET_ACCESS_KEY
            value: <your_secret>
        resources:
          requests:
            memory: "100Mi"
            cpu: "100m"
          limits:
            memory: "100Mi"
            cpu: "100m"

Configuration Parameters

• poll-interval ... Interval to poll SQS queue(default is 10s)
• target ... Pair of SQS URL and HPA name(namespace can be ommited, in which case it will be default)