dignajar/another-scheduler repository overview

⁠Another Autoscaler

Another Autoscaler is a Kubernetes controller that automatically starts, stops, or restarts pods from a deployment at a specified time using a cron syntax.

Another Autoscaler read the annotation of each deployment and performs an increase or decrease in the number of replicas.

⁠Use cases

• Deployments with GPU, stop them after working hours.
• Stop deployments that are not needed on the weekend.
• Save some money in your Kubernetes cluster after working hours or weekends.
• Another Autoscaler is a perfect combination with Cluster Autoscaler.

⁠Install

# Deploy Another Autoscaler into Kubernetes on default namespace
kubectl apply -f https://raw.githubusercontent.com/dignajar/another-autoscaler/master/kubernetes/full.yaml

⁠Annotations

Stop pods at 6pm every day:

another-autoscaler.io/stop-time: "00 18 * * *"

Start pods at 1pm every day:

another-autoscaler.io/start-time: "00 13 * * *"

Start 3 pods at 2:30pm every day:

another-autoscaler.io/start-time: "30 14 * * *"
another-autoscaler.io/start-replicas: "3"

Restart pods at 9:15am every day:

another-autoscaler.io/restart-time: "15 09 * * *"

Restart pods at 2:30am, only on Saturday and Sunday:

another-autoscaler.io/restart-time: "00 02 * * 0,6"

⁠Example: How to start pods at 2pm and stop them at 3pm every day

The following example start 5 replicas in total at 2pm and stop 4 of them at 3pm every day, the deployment start with 0 replicas.

The start-replicas is not incremental, the value is the number of replicas will be setup by Another Autoscaler at the defined time by start-time.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx
  labels:
    app: nginx
  annotations:
    another-autoscaler.io/start-time: "00 14 * * *"
    another-autoscaler.io/start-replicas: "5"
    another-autoscaler.io/stop-time: "00 15 * * *"
    another-autoscaler.io/stop-replicas: "1"
spec:
  replicas: 0
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:latest
        ports:
        - containerPort: 80