if you want to remove an article from website contact us from top.

    this service automatically distributes traffic across multiple resources

    Mohammed

    Guys, does anyone know the answer?

    get this service automatically distributes traffic across multiple resources from screen.

    What is Elastic Load Balancing?

    Automatically distribute incoming application traffic across your application servers using Elastic Load Balancing.

    What is Elastic Load Balancing?

    PDF

    Elastic Load Balancing automatically distributes your incoming traffic across multiple targets, such as EC2 instances, containers, and IP addresses, in one or more Availability Zones. It monitors the health of its registered targets, and routes traffic only to the healthy targets. Elastic Load Balancing scales your load balancer capacity automatically in response to changes in incoming traffic.

    Load balancer benefits

    A load balancer distributes workloads across multiple compute resources, such as virtual servers. Using a load balancer increases the availability and fault tolerance of your applications.

    You can add and remove compute resources from your load balancer as your needs change, without disrupting the overall flow of requests to your applications.

    You can configure health checks, which monitor the health of the compute resources, so that the load balancer sends requests only to the healthy ones. You can also offload the work of encryption and decryption to your load balancer so that your compute resources can focus on their main work.

    Features of Elastic Load Balancing

    Elastic Load Balancing supports the following load balancers: Application Load Balancers, Network Load Balancers, Gateway Load Balancers, and Classic Load Balancers. You can select the type of load balancer that best suits your needs. For more information, see Product comparisons.

    For more information about using each load balancer, see the following documentation:

    User Guide for Application Load Balancers

    User Guide for Network Load Balancers

    User Guide for Gateway Load Balancers

    User Guide for Classic Load Balancers

    Accessing Elastic Load Balancing

    You can create, access, and manage your load balancers using any of the following interfaces:

    AWS Management Console— Provides a web interface that you can use to access Elastic Load Balancing.AWS Command Line Interface (AWS CLI) — Provides commands for a broad set of AWS services, including Elastic Load Balancing. The AWS CLI is supported on Windows, macOS, and Linux. For more information, see AWS Command Line Interface.AWS SDKs — Provide language-specific APIs and take care of many of the connection details, such as calculating signatures, handling request retries, and error handling. For more information, see AWS SDKs.Query API— Provides low-level API actions that you call using HTTPS requests. Using the Query API is the most direct way to access Elastic Load Balancing. However, the Query API requires that your application handle low-level details such as generating the hash to sign the request, and error handling. For more information, see the following:

    Application Load Balancers and Network Load Balancers — API version 2015-12-01

    Classic Load Balancers — API version 2012-06-01

    Related services

    Elastic Load Balancing works with the following services to improve the availability and scalability of your applications.

    Amazon EC2 — Virtual servers that run your applications in the cloud. You can configure your load balancer to route traffic to your EC2 instances. For more information, see the Amazon EC2 User Guide for Linux Instances or the Amazon EC2 User Guide for Windows Instances.Amazon EC2 Auto Scaling — Ensures that you are running your desired number of instances, even if an instance fails. Amazon EC2 Auto Scaling also enables you to automatically increase or decrease the number of instances as the demand on your instances changes. If you enable Auto Scaling with Elastic Load Balancing, instances that are launched by Auto Scaling are automatically registered with the load balancer. Likewise, instances that are terminated by Auto Scaling are automatically de-registered from the load balancer. For more information, see the Amazon EC2 Auto Scaling User Guide.AWS Certificate Manager — When you create an HTTPS listener, you can specify certificates provided by ACM. The load balancer uses certificates to terminate connections and decrypt requests from clients.Amazon CloudWatch — Enables you to monitor your load balancer and to take action as needed. For more information, see the Amazon CloudWatch User Guide.Amazon ECS — Enables you to run, stop, and manage Docker containers on a cluster of EC2 instances. You can configure your load balancer to route traffic to your containers. For more information, see the Amazon Elastic Container Service Developer Guide.AWS Global Accelerator — Improves the availability and performance of your application. Use an accelerator to distribute traffic across multiple load balancers in one or more AWS Regions. For more information, see the AWS Global Accelerator Developer Guide.Route 53 — Provides a reliable and cost-effective way to route visitors to websites by translating domain names into the numeric IP addresses that computers use to connect to each other. For example, it would translate www.example.com into the numeric IP address 192.0.2.1. AWS assigns URLs to your resources, such as load balancers. However, you might want a URL that is easy for users to remember. For example, you can map your domain name to a load balancer. For more information, see the Amazon Route 53 Developer Guide.AWS WAF — You can use AWS WAF with your Application Load Balancer to allow or block requests based on the rules in a web access control list (web ACL). For more information, see the AWS WAF Developer Guide.

    स्रोत : docs.aws.amazon.com

    Elastic Load Balancing

    Elastic Load Balancing

    Create a Free Account

    ELB Free Tier includes 750 Hours per month shared between Classic, Application and Network load balancers.

    Amazon Web Services China Region • 12 Months Free

    Create an account, and get started »

    Elastic Load Balancing automatically distributes incoming application traffic across multiple Amazon EC2 instances. It enables you to achieve greater levels of fault tolerance in your applications, seamlessly providing the required amount of load balancing capacity needed to distribute application traffic. Elastic Load Balancing detects unhealthy instances and automatically reroutes traffic to healthy instances until the unhealthy instances have been restored. Customers can enable Elastic Load Balancing within a single or multiple Availability Zones for more consistent application performance. Elastic Load Balancing can also be used in an Amazon Virtual Private Cloud (“VPC”) to distribute traffic between application tiers in a virtual network that you define.

    Application Load Balancer

    Application Load Balancer is best suited for load balancing of HTTP and HTTPS traffic and provides advanced request routing targeted at the delivery of modern application architectures, including microservices and containers. Application Load Balancer routes traffic to targets within Amazon VPC based on the content of the request.

    Network Load Balancer

    Network Load Balancer is best suited for load balancing of Transmission Control Protocol (TCP), User Datagram Protocol (UDP), and Transport Layer Security (TLS) traffic where extreme performance is required. Network Load Balancer routes traffic to targets within Amazon VPC and is capable of handling millions of requests per second while maintaining ultra-low latencies.

    Gateway Load Balancer

    Gateway Load Balancer makes it easy to deploy, scale, and run third-party virtual networking appliances. Providing load balancing and auto scaling for fleets of third-party appliances, Gateway Load Balancer is transparent to the source and destination of traffic. This capability makes it well suited for working with third-party appliances for security, network analytics, and other use cases.

    Classic Load Balancer

    Classic Load Balancer provides basic load balancing across multiple Amazon EC2 instances and operates at both the request level and the connection level. Classic Load Balancer is intended for applications that were built within the EC2-Classic network.

    Benefits

    Highly availability and elasticity

    Elastic Load Balancing is part of the Amazon Web Services network in China, with native awareness of failure boundaries like AZs to keep your applications available across a region. ELB is also a fully managed service, meaning you can focus on delivering applications and not installing fleets of load balancers. Capacity is automatically added and removed based on the utilization of the underlying application servers.

    Robust monitoring & visibility

    Elastic Load Balancing allows you to monitor the health of your applications and their performance in real time with Amazon CloudWatch metrics, logging, and request tracing. This improves visibility into the behavior of your applications, uncovering issues and identifying performance bottlenecks in your application stack. ELB helps ensure compliance with application Service Level Agreements (SLAs).

    Security

    Elastic Load Balancing works with Amazon Virtual Private Cloud (VPC) to provide robust security features, including integrated certificate management, user-authentication, and SSL/TLS decryption. Together, they give you the flexibility to centrally manage TLS settings and offload CPU intensive workloads from your applications. ALB also supports integration with Amazon WAF, adding a level of protection before bad actors reach the application. Further, S2N and HTTP Guardian have been developed as Open Source solutions to reduce the potential for HTTP-based attacks.

    Integration and global reach

    As a native Amazon Web Services service, ELB is tightly integrated with other Amazon Web Services services like EC2, ECS/EKS and operational tools such as Amazon CloudFormation and Amazon Web Services Billing.

    Feature breadth

    Elastic Load Balancing offers the breadth of features needed by businesses of all sizes, while delivering them in an Amazon Web Services -native experience. Elastic Load Balancing includes support for features needed in container-based workloads, including HTTP/2, gRPC, TLS offload, advanced rule-based routing, and integration with container services as an ingress controller. ALB provides customers with a native HTTP endpoint for calling Lambda functions, removing the dependency on other solutions. Further, Gateway Load Balancer creates one gateway for routing traffic through fleets of third-party appliances.

    Use cases

    Migrating to Amazon Web Services

    ELB supports the load balancing capabilities critical for you to migrate to Amazon Web Services. ELB is well positioned to load balance both traditional as well as cloud native applications with auto scaling capabilities that eliminate the guess work in capacity planning. ELB is easy to configure and use, which makes your migration experience simple. The managed experience of ELB means that you can focus on the most critical part of a successful migration - migrating applications - instead of configuring load balancers. ELB also integrates well with the common management tools that you are familiar with such as Terraform and Ansible.

    स्रोत : www.amazonaws.cn

    AWS

    Elastic Load Balancing automatically distributes incoming application traffic across multiple targets, such as Amazon EC2 instances, containers, and IP add…

    AWS - Elastic Load Balancing (ELB) - Overview

    Term 1 / 40

    What is Elastic Load Balancing?

    Click the card to flip 👆

    Definition 1 / 40

    Elastic Load Balancing

    distributes incoming application or network traffic across multiple targets in multiple availability zones.

    This includes:

    Amazon EC2 instancescontainersIP addresses

    Elastic Load Balancing scales your load balancer as traffic to your application changes over time, and can scale to the vast majority of workloads automatically.

    Click the card to flip 👆

    Created by Dave_J_HartmanPLUS

    Elastic Load Balancing automatically distributes incoming application traffic across multiple targets, such as Amazon EC2 instances, containers, and IP addresses. It can handle the varying load of your application traffic in a single Availability Zone or across multiple Availability Zones. Elastic Load Balancing offers three types of load balancers that all feature the high availability, automatic scaling, and robust security necessary to make your applications fault tolerant.

    TBD: Documentatio…

    Terms in this set (40)

    What is Elastic Load Balancing?

    Elastic Load Balancing

    distributes incoming application or network traffic across multiple targets in multiple availability zones.

    This includes:

    Amazon EC2 instancescontainersIP addresses

    Elastic Load Balancing scales your load balancer as traffic to your application changes over time, and can scale to the vast majority of workloads automatically.

    What are the key benefits of a Load Balancer?

    - distributes workloads to increase availability and performance

    - provides fault tolerance - Provides fault tolerance for applications

    - Add/Remove resources as needed - You can add and remove compute resources from your load balancer as your needs change, without disrupting the overall flow of requests to your applications.

    - health checks - You can configure health checks to ensure that traffic is only routed to healthy resources.

    - Offload encryption/decryption - Frees compute resources from having to perform encryption/decryption functions.

    What are the different types of load balancers?

    There are 3 types of load balancer:

    1) Application Load Balancer - If you need flexible application management, we recommend that you use an .

    2) Network Load Balancers - Provides for extreme performance and static IP is needed for your application

    3) Classic Load Balancers -

    What IP addresses do ELB's have?

    ELB's do not have pre-defined IPv4 addresses, you resolve them using a DNS name.

    Do Load Load Balancers work across AZ's or Regions?

    Load Balancers only work across AZ's within a region. VPC's do not span regions and LB's are assigned are the region level.

    Using Route 53 and ELB's you can create a cross-region architecture.

    What is the default routing process for ELB's?

    By default, routes each request independently to the registered instance with the smallest load.

    Is there a way to access/use the IP of the Load balancers?

    No, we never get the IP's for the load balancers themselves.

    Can load balancers be used for internal traffic?

    Yes, an internal load balancer routes traffic to EC2 instances in private subnets.

    Note that when you create a Classic Load Balancer in EC2-Classic, it must be an Internet-facing load balancer.

    Do targets for an ELB have to have a public IP address for internet facing ELBs?

    No, both Internet-facing and internal load balancers route requests to your targets using private IP addresses. Therefore, your targets do not need public IP addresses to receive requests from an internal or an Internet-facing load balancer.

    What is the ELB Controller?

    The ELB Controller is the service which stores all the configuration and also monitors the load balancer and manages the capacity that is used to handle the client requests.

    What is the difference between auto scaling and the scaling the ELB does?

    AWS itself handles the scaling of the ELB capacity and this scaling is different to scaling of the EC2 instances to which the ELB routes its request to, which is handled by Auto Scaling

    What is the default TTL for the public IP's that are assigned to the ELB nodes?

    60 seconds

    If ELB scales based on the traffic profile, how long will it generally take for ELB to scale and what happens when this occurs.?

    This can range from 1 to 7 minutes.

    The ELB controller will update the DNS records with the new list of IP addresses.

    What happens if an instance becomes unhealthy?

    The instance will be removed from the pool (but still registered with Elastic Load Balancing) when the limit on unsuccessful health checks is reached. As long as an instance is registered with Elastic Load Balancing, the load balancer will continue to perform health checks on an instance.

    What error message/code is returned if there is an issue with the ELB?

    HTTP 504 means the elb has timed out within the idle timeout period.

    Can we get the public IP address of a client request?

    Yes, the IPv4 address is part of the X-Forwarded-For header.

    What is cross-zone load balancing?

    स्रोत : quizlet.com

    Do you want to see answer or more ?
    Mohammed 14 day ago
    4

    Guys, does anyone know the answer?

    Click For Answer