AWS Auto Scaling is a cloud service provided by Amazon Web Services (AWS). The service automatically adjusts capacity to maintain steady, predictable performance at the lowest possible cost.
Introduction.
Auto Scaling is a cloud computing feature to scale resources. It helps automatically adjust the capacity of your cloud resources to match the demand. Auto Scaling is helpful for ecommerce stores such as Magento. The store has variable traffic spikes, which are hard to predict. The service will monitor all scalable cloud services and resources related to a user’s applications.
How Does Work AWS Auto Scaling.
Scaling Plans : You can create scaling plans that automate how groups of resources respond to demand changes. You can choose to optimize availability, costs, or a balance of both.
Monitoring : AWS Auto Scaling monitors your application and automatically adds or removes capacity from your resource groups in real-time.
Scaling Strategy : AWS Auto Scaling includes predefined scaling strategies that simplify the setup of scaling policies.
load Balancing vs Auto Scaling.
| Load Balancing | Auto Scaling | |
| Traffic Distribution | Balances traffic among available resources. | Not involved in traffic distribution. |
| AWS Services | Elastic Load Balancer (ELB) (ALB, NLB, or CLB). | Auto Scaling Groups managing EC2 or other resources. |
| Integration | Works with EC2 instances, ECS tasks, Lambda. | Manages EC2 instances or ECS tasks. |
| EC2 instances | Routes incoming customer traffic to multiple EC2 instances to balance load. | Adds more EC2 instances during a sale or traffic surge and removes them during off-peak hours. |
| Instance failure | Stops sending traffic to the failed instance. | Replaces the failed instance with a healthy one. |
| Resource Adjustment | Does not add/remove resources. | Automatically adds or removes resources. |
| Health Monitoring | Detects and routes traffic away from unhealthy resources. | Replaces unhealthy resources (if configured). |
| Purpose | Improves application availability, performance, and fault tolerance. | Optimizes cost by ensuring you use only the required resources. |
Benefits of AWS Auto Scaling.
- Automatically scales resources up during high demand and down during low demand, ensuring you only pay for what you use.
- Maintains consistent performance even during unexpected demand spikes.
- Detects unhealthy instances or resources and replaces them automatically, ensuring high availability.
- Works seamlessly with various AWS services, like Elastic Load Balancers and CloudWatch.
- Supports scaling based on custom CloudWatch metrics, tailoring scaling to your specific application needs.
- Ensures high resource availability during peak loads, maximizing efficiency.
- Scale resources across different AWS regions to support global applications.
- Works seamlessly with AWS services like EC2, ECS, DynamoDB, Aurora, and Elastic Load Balancing to create a fully managed, scalable architecture.
AWS Auto Scaling Group.
AWS Auto Scaling Groups are an integral part of the scaling process. An AWS Auto Scaling Group (ASG) is a core component of AWS Auto Scaling that allows you to manage a group of Amazon EC2 instances collectively. Auto Scaling Group (ASG) is a collection of EC2 instances. It dynamically adjusts the number of instances in the group to meet the specified scaling policies, ensuring the application remains reliable and cost-efficient.
Core Components of an Auto Scaling Group :
- Launch Template.
- Desired, Minimum, and Maximum Capacity.
- Scaling Policies.
- Health Checks.
- Availability Zones and Load Balancers.
Conclusion.
In Conclusion, AWS Auto Scaling ensures your resources are always right-sized for the job, delivering performance and savings without the manual effort. It’s a smarter way to manage cloud infrastructure.
