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Installing the Horizontal Autoscaler

To enable horizontal autoscaling in your cluster setup, follow these steps to update your Docker Compose files.

Step 1: Update Your Root Compose

In the root compose file, add the following service definition:

root_horizontal_autoscaler:
  image: docker.io/sadegh81/root-hca:v2 # or v1
  pull_policy: always
  container_name: root_horizontal_autoscaler
  hostname: root_horizontal_autoscaler
  expose:
    - "10080"
  ports:
    - "10080:10080"
  environment:
    - SYSTEM_MANAGER_URL=<YOUR_IP>
    - MY_PORT=10080
    - CLUSTER_MANAGER_URL=<YOUR_IP>
    - MONGO_ROOT_URI=mongodb://<YOUR_IP>:10007/
  depends_on:
    - system_manager
    - mongo_root
    - mongo_rootnet

Step 2: Update Your Cluster Compose

In the cluster compose file, add the following service definition:

cluster_horizontal_autoscaler:
  image: docker.io/sadegh81/cluster-hca:v2 # or v1
  pull_policy: always
  container_name: cluster_horizontal_autoscaler
  hostname: cluster_horizontal_autoscaler
  expose:
    - "10180"
  ports:
    - "10180:10180"
  environment:
    - MY_PORT=10180
    - SYSTEM_MANAGER_URL=<YOUR_IP>
    - CLUSTER_MANAGER_URL=<YOUR_IP>
    - MONGO_CLUSTER_URI=mongodb://<YOUR_IP>:10107/
    - MONGO_ROOT_URI=mongodb://<YOUR_IP>:10007/
  depends_on:
    - system_manager
    - root_horizontal_autoscaler
    - mongo_cluster
    - mongo_clusternet

Notes

  • If the autoscaler fails to work properly, try restarting the containers.
  • This may happen because the autoscaler occasionally fails to register itself with the root orchestrator on the first run.