AWS Elastic Load Balancer ELB Using CLI Part-1
AWS Elastic Load Balancer [ELB] Using CLI
ELB stands for AWS Elastic Load Balancer. ELB is used to manage load balance between multiple EC2 instances running on AWS cloud. It provides scalability and false tolerance for application.
What Are The ELB Feature?
ELB is fully managed component which manage and distribute incoming application network traffic across multiple EC2 instances which can be in multiple AWS EC2 availability zones.
ELB can be used to load balance services in private and public IPs.
ELB can be terminate and process incoming secure SSL connection which improve system performance.
ELB provides sticky session feature to maintain user Cookie for that particular session and ensure that user session request should sent to same EC2 instance.
It provides Auto-Scaling that scale out AWS cloud space automatically.
It monitor the health of multiple EC2 instances running behind ELB and configured rules
It integrate with Route 53 which enables to configure our application with custom domains and global distribution of application content.
AWS support two types of load balancers:
1. Classic Load Balancer [Old Original Type]
2. Application Load Balancer [Latest Introduced Type]
1. Classic Load Balancer: is used to route traffic, based on applications or network level details.
It is best option for simple load balancing traffic across multiple EC2 instances where high availability, auto scaling and robust security are basic requirement of application.
It works under 4th layer of OSI model which is Transport Layer.
2. Application Load Balancer: For advanced functionality and application level support we can use Application Load Balancer.
This service operates at Application Layer and allows user to define routing rules based on content across multiple services running on one or more AWS EC2 instances.
It works under layer 7 of OSI model that is Application Layer.
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