AWS, Cloud Computing

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Maximizing Efficiency Shared Application Load Balancers with AWS Elastic Beanstalk


In the era of cloud computing, where scalability, reliability, and cost-efficiency are paramount, Amazon Web Services (AWS) Elastic Beanstalk is a versatile platform for deploying and managing web applications. When paired with Shared Application Load Balancers (ALB), it becomes a potent combination that enables businesses to maximize efficiency in handling traffic and optimizing resource utilization.


A shared load balancer is a load balancer that you create, maintain, and use across several Elastic Beanstalk setups using the Amazon Elastic Compute Cloud (Amazon EC2) service.

AWS Elastic Beanstalk automatically creates a Load Balancer specifically for your environment when you create a load-balanced, scalable environment and decide to use an application load balancer.

You might wish to avoid paying for numerous dedicated load balancers in some circumstances. When you have different environments, for instance, if your application is a collection of microservices rather than a single monolithic service, this can be useful. You may decide to employ a shared load balancer in such circumstances.

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Shared Application Load Balancer Use Cases

  • The load balancer and listeners are created and managed separately from Elastic Beanstalk. You can add rules and processes, and AWS Elastic Beanstalk sets and handles default rules and processes. The listener rules and processes that were added when the environment was created are taken away by AWS Elastic Beanstalk.
  • The default rule is only connected to a port 80 listener by AWS Elastic Beanstalk if one is present. The default rule must be linked to a different default listener port if you select one (the Elastic Beanstalk console and EB CLI take care of this for you).
  • For the load balancer, you can set up one or more security groups. If you don’t, AWS Elastic Beanstalk determines whether a security group that it already administers is connected to the load balancer. If not, a security group is created by AWS Elastic Beanstalk and attached to the load balancer. The last environment that shared the load balancer with AWS Elastic Beanstalk terminates when this security group is deleted.
  • AWS Elastic Beanstalk cannot be used to configure access log capture in your Application Load Balancer, and after an environment has been created, listeners and listener rules cannot be modified. Only processes (target groups) can be updated. Utilize Amazon EC2 to set up listeners, listener rules, and access log capture configuration.


  • Cost Efficiency: Shared load balancers help reduce costs as you don’t need a dedicated load balancer for each environment.
  • Scalability: Easily scale your application across multiple environments, making it suitable for microservices architectures.
  • Streamlined Management: Centralized management simplifies load balancer configuration and maintenance.
  • Resource Optimization: Eliminate the need for additional security groups by letting AWS Elastic Beanstalk handle them.
  • Flexibility: Customize load balancer settings and security groups to suit your application’s requirements.

Best Practices

  • Resource Naming: Clearly label shared load balancers to identify their purpose and usage.
  • Security Groups: Review and manage security group settings to ensure proper network access control.
  • Regular Monitoring: Monitor shared load balancer performance and adjust as needed.
  • Documentation: Maintain detailed documentation for load balancer configurations.
  • Access Logs: Utilize Amazon EC2 for configuring access log capture on your Application Load Balancer.


By leveraging shared load balancers, we can reduce costs, improve scalability, and streamline the configuration process. However, it’s essential to follow best practices and be aware of potential challenges to ensure a smooth experience.

While shared load balancers offer numerous advantages, it’s crucial to remain cautious about resource conflicts and security concerns. Remember that once an environment is created, modifying listeners and rules can be challenging, and terminating an environment sharing a load balancer may impact its associated security group. As your application scales, managing shared load balancers for multiple environments can also introduce complexity.

Drop a query if you have any questions regarding AWS Elastic Beanstalk and we will get back to you quickly.

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1. Can I use a shared load balancer with AWS Elastic Beanstalk for any type of application?

ANS: – Shared load balancers are particularly useful for applications with multiple environments, such as those built on microservices architectures. However, they can be employed for various types of applications, depending on your specific requirements. Evaluate your application’s needs and the benefits of shared load balancers to determine if they are a suitable choice.

2. What should I do if I need to modify listener rules or listeners after creating an environment with AWS Elastic Beanstalk?

ANS: – AWS Elastic Beanstalk locks listener rules and listeners once an environment is created, making modifications challenging. If you need to make changes to listeners or rules, consider creating a new environment with the desired configuration. Alternatively, you can set up listeners, listener rules, and other advanced configurations directly using Amazon EC2 for more flexibility. Remember that careful planning during the initial setup can help avoid the need for significant changes later.

WRITTEN BY Ravikumar Eranna Murali

Ravikumar works as a Research Intern at CloudThat. His expertise lies in AWS Services and pursuing DevOps technologies like Kubernetes, Docker, and Jenkins. Ravi enjoys learning and working on new challenges to give the best solution.



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