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

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300 views

Amazon ELB page 'recieving' time very slow, running EC2 + spot

I have an Elastic Load Balancer paired to a set of instances one is persistant and the other is a variable number of spot instance. When i access the servers directly using their end points, the ...
5
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1answer
2k views

How to block Nginx access log statements from specific user agents

I am looking to turn off logging in the Nginx access log file from specific requests from http user agents. Basically from the Amazon ELB Health Check and our external (Pingdom) monitoring. Since ...
3
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1answer
145 views

How to find out the location of Google IP number: e.g. 209.85.143.94

I am building DNS service and I need to find out location of DNS servers querying me. Apparently anyone who is using Google public DNS like 8.8.8.8 is coming from Google /17 network, and if I do geoip ...
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1answer
267 views

Amazon AWS: SSL in our testing environment

My company has a running business web service on AWS which uses a wildcard SSL certificate (works for *.example.com). Multiple partners have subdomains and need SSL (https://partner1.example.com, ...
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3answers
711 views

AWS ELB as backend for Varnish Accelerator

I am working on a large deployment on AWS that has high uptime requirements and variable loads throughout the day. Obviously, this is the perfect use case for ELB (Elastic Load Balancer) and ...
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2answers
648 views

Disable https for certain path in nginx results in instance behind ELB going into redirect loop

I am using elb terminated ssl. I want to force /product/performancesummaries/ to be HTTP only. Here is my current configuration that I am playing around with: user www-data; worker_processes 2; pid ...
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0answers
240 views

AWS SSL Load Balancer

OK, I am looking for some pointers. Basically I have a white-label app/site that will allow users to setup their own domain to use for their customer front-end. We have 2 dedicated servers and a load ...
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1answer
271 views

How can I determine what caused a sudden increase of traffic to my AWS servers?

I recently set up a cloud system on Amazon AWS for a big website. I usually use Elastic Beanstalk to deploy the application (written in Java Spring) and it's currently running on 4 micro instances. ...
3
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1answer
480 views

Unicorn behind ELB, no nginx

If I understand Unicorn right (and in particular from their philosophy doc) it seems like Unicorn was really designed to operate behind a reverse proxy like nginx. My question is: can I drop nginx ...
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2answers
485 views

Amazon VPC ELB SSL port redirection

I have an Elastic load balancer with 2 ports open, 80 and 443. 443 has SSL on it. both 80 and 443 are being redirectedt to internal servers port 80. The issue is that i want to run my site only on ...
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2answers
2k views

Can Elastic Load Balancers correctly distribute traffic to different size instances

Just been looking into Elastic Load Balancers. As I understand it they just do round robin, evenly distributing connections to the servers behind them. So what happens if you have different size ...
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1answer
2k views

SSL redirect on EC2 instance behind SSL terminating load balancer

I'm trying to redirect all url's to https in a web application. I have an ec2 instance behind an elastic load balancer. SSL is terminated on the load balancer. Any attempts at redirection end up ...
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2answers
1k views

Amazon VPC - Elastic load balancer not forwaring requests to Private Subnet instance

I have setup and Elastic load balancer in VPC. There is a public and private subnet. Currently the web server is in the Private subnet and there is a NAT instance in public subnet, from which the web ...
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2answers
560 views

Amazon Elastic Beanstalk - Any file managers?

Are there any file manager UIs I can use with Elastic Beanstalk (upload,view,etc)? Does the AWS Management Console include one? I'm doing PHP and HTML.
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2answers
1k views

CloudFront with Custom Origin and ELB

We are using CloudFront for our static assets but also wanted to allow for Gzip. We set up a new distribution with a custom origin pointing back to our application servers which are behind a elastic ...
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1answer
1k views

After setting up Elastic Load balancer my https doesn't work anymore. Nginx error

I have a regular instance that works fine when not behind a load balancer. I set up an ELB with 80 forwarding to 80 and 443 forwarding to 443 and sticky sessions. Afterward I receive this error when ...
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3answers
322 views

AWS Elastic load balancer doesn't decrease instances from Alarm Trigger

I have a load balancer that I created an auto-scaling-group and launch-config for. I created the auto-scaling-group with a min-size of 1 and max size of 20. I have a scaledown policy: ...
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0answers
248 views

ELB allows unencrypted/http communication on port 443?

I was testing a configuration of AWS ELB to use for SSL termination when I came across an intermittent issue... Ocasionally, you can specify HTTP with port 443 (http://...:443) and ELB will pass ...
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2answers
809 views

Load Balancing on Amazon (AWS) and staying up to date

I would like to have a load balancer for my site and have the site up to date. The load balancer will take the AMI I select and spin up more of those instances when processing power hits a certain ...
2
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0answers
385 views

Resque(Redis) On EC2 Micro Replciated to 3 availability zones

I'm going to build a failover setup for my resque jobs system wich uses Redis as a queue. The idea is to put 3 redises in different availability zones on micro instances and replicate them. Also would ...
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0answers
152 views

What is best practice for upgrades with AWS autoscaling and database migrations?

I would like to use a combination of an ELB and AutoScaling for a web application. For upgrades to the web application that don't involve changing the database, I can simply rotate all the instances ...
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3answers
1k views

Load testing sites behind an EC2 load balancer with ApacheBench

When ever I try to load test a site that is load balanced on EC2 I get the following message: ab -n 20 -c 20 http://www.somesite.com/ Benchmarking www.somesite.com (be patient)...Send request ...
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0answers
405 views

How to debug when ELB fails but nginx looks ok?

I'm using Amazon's elastic load balancing across several machines that are running nginx. The problem is, after running for fifteen minutes or so, ELB starts to mark all of the machines as dead. When ...
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5answers
4k views

How can I make my web server reachable via IPv6 on the AWS platform?

My business's web site uses the AWS platform. I want the site's visitors to be able to reach my content using the IPv6 protocol. How can I add an IPv6 address?
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1answer
1k views

Amazon ELB HTTPS Backend authentication causing invalid certificate error

I have a wild card SSL certificate issued by Starfield Secure Certifcation Authority that is valid thru 2014. I have been using the certificate with ELB without backend authentication (cert not ...
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1answer
245 views

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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2answers
311 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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4answers
1k views

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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2answers
1k views

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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2answers
4k 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
573 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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2answers
271 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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2answers
2k views

AWS - Assign an Elastic IP to a ELB

Is it possible to assign an Elastic IP to a Load Balancer?
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1answer
71 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 ...
2
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3answers
424 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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2answers
400 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 ...
4
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1answer
3k views

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 ...
2
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2answers
434 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
709 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 - - ...
3
votes
1answer
2k 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 ...
4
votes
2answers
8k 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 ...
2
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1answer
491 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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0answers
87 views

Sticky sessions with ELB except for crawlers (or at least google)?

I have a cluster of servers behind an elastic load ballancer. We need to use sticky sessions for users, but for Google crawler we would like it to be non sticky. Is this possible?
2
votes
1answer
356 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 ...
2
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3answers
666 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 ...
2
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2answers
656 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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1answer
663 views

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?
2
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1answer
683 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
872 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 ...