scale-out

#!/usr/bin/env bash

set -e

CLOUDFORMATION_STACK_NAME=playground-PROD-cdk-playground

POLICY_ARN=$(
  aws cloudformation describe-stacks \
      --stack-name "$CLOUDFORMATION_STACK_NAME" \
      --profile developerPlayground \
      --region eu-west-1 \
      --no-cli-pager | \
      jq -r '.Stacks[].Outputs[] | select( [.OutputKey | contains("ScaleOutArn") ] | any) | .OutputValue'
)

ASG_NAME=$(
  aws cloudformation describe-stacks \
      --stack-name "$CLOUDFORMATION_STACK_NAME" \
      --profile developerPlayground \
      --region eu-west-1 \
      --no-cli-pager | \
      jq -r '.Stacks[].Outputs[] | select( [.OutputKey | contains("AutoscalingGroupName") ] | any) | .OutputValue'
)

CURRENT_DESIRED_CAPACITY=$(
  aws autoscaling describe-auto-scaling-groups \
    --auto-scaling-group-names "$ASG_NAME" \
    --profile developerPlayground \
    --region eu-west-1 | \
    jq -r '.AutoScalingGroups[].DesiredCapacity'
)

aws autoscaling execute-policy \
  --policy-name "$POLICY_ARN" \
  --profile developerPlayground \
  --region eu-west-1

NEW_DESIRED_CAPACITY=$(
  aws autoscaling describe-auto-scaling-groups \
    --auto-scaling-group-names "$ASG_NAME" \
    --profile developerPlayground \
    --region eu-west-1 | \
    jq -r '.AutoScalingGroups[].DesiredCapacity'
)

echo "Desired capacity has been updated from $CURRENT_DESIRED_CAPACITY to $NEW_DESIRED_CAPACITY"