ELB is Amazon's managed Load Balancer service, used in conjunction with its EC2 virtual machine cloud hosting service.

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With AWS ELB, is it possible to direct specific subdirectories to specific servers?

We're moving from a single EC2 server setup to a multiple-webserver setup, and using ELB to spread traffic across the servers. Our core application will handle this just fine. There's one sub ...
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355 views

Elastic Load Balancing using a chain of domains/hosts

I've setup an elastic load balancer on EC2 which (for example) has the public DNS (A Record) of: LB-165746761.eu-west-1.elb.amazonaws.com I've then registered a domain which I want to act as my ...
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Using ELB Across Multiple Regions

Let say I have the website domain http://myawesomesite.com, and to start I have a ELB setup on the US-EAST Region with 2 instances running my application. As the site becomes more awesome and I ...
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IP Range for internal private IP of Amazon ELB

I'm trying to find out the range of IP addresses that an Elastic Load Balancer could have from an EC2 instance which is behind it. This is so I can configure the HttpRealIpModule of nginx correctly. ...
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4answers
8k views

Nginx set_real_ip_from AWS ELB load balancer address

I have a set of Nginx servers behind an Amazon ELB load balancer. I am using set_real_ip (from the HttpRealIpModule) so that I can access the originating client IP address on these servers (for ...
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3answers
919 views

Can you change an AWS Elastic Load Balancer health check without causing instances to go out of service?

For a number of reasons I need to change the health check URL of a live site behind an ELB. The ELB is configured for health checks every 30 seconds, with a healthy threshold of 2 and unhealthy ...
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3answers
2k views

mod_rpaf behind an Amazon ELB

I've got mod_rpaf installed to get the user's IP address from the X-Forwarded-For header in PHP, Apache logs, etc. Unfortunately, it looks like I have to explicitly set which IPs that header will be ...
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314 views

Amazon ELB disguises IP Address to EC2 Boxes?

It appears my Amazon Elastic Load Balancer is allocating traffic to EC2's, but without their IP addresses? Is this usual behaviour? It's incredibly annoying. I.e. ELB CName is on my domain name DNS, ...
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AWS - Assign an Elastic IP to a ELB

Is it possible to assign an Elastic IP to a Load Balancer?
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78 views

AWS - Load balance to different clusters

So I'm using ELB to load balance incoming requests. Is it possibile to make the ELB listen on two ports and, for example, route all the request made to port 80 to a specific set of instances, and ...
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3answers
501 views

Mail bouncing when using a CNAME for domain root and load balancing

We recently moved to EC2 and started using amazon's elb for load balancing. We're using CloudFlare for DNS which allows us to use a cname the domain root. However, we occasionally have people tell ...
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433 views

Why should one use amazon-elb?

Amazon-elb is a scalability solution that works like a proxy to several instances of my amazon ec2 servers. I wonder if it would'nt be more effective to have a roundrobin DNS to resolve my name into a ...
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Setting Up ELB with SSL - What is Backend Authentication?

I started setting up Amazon's Elastic Load Balancing Service for my server pool and I need to setup HTTPS/SSL. I have all my SSL Certificates setup, but then I come to the step for backend ...
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2answers
568 views

ELB Alternatives for AWS when transferring large amount of data

So I got a unique problem. Our app is designed to server large amount of files using a special link that is one time use. We have been playing with ELB but notice an interesting "bug", if you start ...
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1answer
978 views

Working of Amazon Elastic Load Balancers

I've a Amazon ELB behind which there are 3 EC2 instances distributed across 3 zones. Following are extracts of access logs on each instances: 1st instance(Zone A): 10.210.214.231 - - ...
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4k views

Endless Redirect Loop with AWS ELB and wordpress site using wordpress https plugin

I have configured an AWS ELB to point to my Ubuntu Server running the Wordpress 3.2.1. Everything worked great on the server until I put it behind a load balancer. I setup the load balancer to ...
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2answers
10k views

How to install a Thawte SSL certificate on Amazon Elastic Load Balancer?

Here's my situation. We've generated an SSL certificate from Thawte for a site we're hosting on EC2. We have our servers load balanced using Elastic Load Balancer. Thawte gives us one PKCS signed ...
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1answer
677 views

Amazon EC2 ELB directing load to other instances and session stores

If we scale up (add an instance to ELB), could we redirect some existing requests to the new instance. So that, The users that we force to a new server will be asked to login again If we scale down ...
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1answer
477 views

Amazon ELB not loadbalancing between two servers

I'm just set up a small load balanced architecture in AWS using two Large EC2 instances in the same availability zone with a non-sticky ELB in front. Amazon reports that both instances are health and ...
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3answers
718 views

Proxy to load balancer, bandwidth?

I have an Amazon Elastic Load Balancer. I can't set my domain apex -- domain.com to the ELB because Amazon doesn't provide an IP. If I: set up a new EC2 instance (whih has its own IP) set up a ...
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2answers
764 views

AWS ELB - Stress test - Transient Error

I'm doing stress testing of our system. Currently we have 5 m1.large instances running behind ELB, sitting in east region. In west region, there are 3 small instances (with JMeter) that I use to ...
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Does AWS ELB support RFC-5746 when configured for HTTPS

Is it possible to configure AWS ELB for HTTPS access in such a way as to support RFC-5746 (TLS Renegotiation Indication Extension)? If so, how?
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972 views

Amazon ELB and private IP addresses

We are considering using Amazon's ELB for load-balancing requests to internal API servers. If we use it, do we have to route our traffic through the public IP addresses, and thus lose the speed and ...
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3answers
926 views

Amazon EC2 Load Balanced & Auto Loaded Cluster - What happens to browser sessions?

Assuming a cluster of webservers on EC2 with both Elastic Load Balancing and Auto Loading (meaning instances start and die based on demand), can someone tell me what happens to a user's browser's ...
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835 views

AWS Autoscaling issue with existing nodes in ELB

I already have a ELB setup called MyLoadBalancer. I already have 2 nodes running on it with health checks (that checks a URL on the node to see if they are up) Created an autoscaling group (min 2, ...