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

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How to upload a certificate to Amazon ELB?

I've generated the pem files for a new certificate which we recently purchased from comodo, using this link as a guide: ...
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30 views

How to configure ELB load-balancer over HTTPS for two sites deployed to the same pair of servers?

I would appreciate immensely if you shed some light into what we might be missing or doing wrong. I am not completely in charge of the configuration, and I'm not an expert on the subject, but have ...
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49 views

Way to limit Amazon ELB to a fixed set of IP addresses?

We would like to use Amazon Elastic Load Balancing, however, our application requires a fixed set of IP addresses as our clients need to know a finite list of possible destinations for specific ...
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9 views

Listener Protocol for ELB in front of Squid Proxy

We have two Squid proxy servers for High availability. We want to use Amazon ELB in front of these Squid proxy servers. When we use Load Balancer Protocol as TCP and port 8080, Instance Protocol TCP ...
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24 views

Is it a good design to have multiple proxy layer?

I have 3 Django applications (Django + Nginx for static files) in autoscaling group in AWS. All are served as subdolfers of a single domain http://example.com/app1 http://example.com/app2 ...
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29 views

Unable to get Route 53 to work with ELB

I have created an ELB for my 2 dev instances. My domain name is example.com, which is an A record to an Elastic IP for an EC2 instance. I'm trying to create a subdomain record dev.example.com, which ...
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27 views

Force nginx to close connection

We have a setup that looks like this: Client -> AWS ELB (tcp load balancing)-> NGINX (ssl termination) -> application server. We want to gracefully take application servers out of the load balancer. ...
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59 views

AWS ELB with SSL backend adds proxy protocol inside SSL stream

Note, this has been also posted in http://thread.gmane.org/gmane.comp.web.haproxy/27737 we are trying to configure this architecture: ELB terminating SSL, using preconfigured certificates. ...
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34 views

AWS Elastic Load Balancer And 408 Request Timeout

We have a scenario where we are trying to access Openfire admin console behind AWS ELB using https. The http url works fine , but the https does not work, and we see a 408 request timeout error while ...
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18 views

ELB_5xx errors but no application errors

We see lot of ELB_5xx errors recently. During this time there is no error logged in the back end server, no HTTP 5xx errors , there is no 5xx errors in ELB logs and there is no application restart. ...
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1answer
29 views

AWS ELB health check fails on LDAP authentication

I am running a Docker container through ECS. The container runs an Apache server hosting a simple web application. However, the server requires LDAP authentication to access the page. I am using a ...
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27 views

Elb healthcheck fails for Https

Im using a url for ELB healthcheck in AWS. This health check is working with Http:1140/<myurltoapplication> and the attached Ec2 Instance were showing as Inservice but when i use ...
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1answer
64 views

AWS ELB health check when using nginx and TCP

I have an elasticbeanstalk environment that uses nginx as a frontend server for a node.js application. The environment uses an elastic load balancer configured to accept connections on ...
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1answer
14 views

Installing Deis in AWS without ELB

I'd like to install a Deis cluster in AWS but without using ELB, since we have already paid for an alternative (BigIP), and our network guys are comfortable with it. Is it easy to configure Deis not ...
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0answers
54 views

504s on Elastic Beanstalk app deploy (user -> ELB -> Elastic Beanstalk mod_wsgi)

I have a Python Elastic Beanstalk load-balanced app. Here is the path a user request takes on its way into the Elastic Beanstalk app: user -> Elastic Beanstalk ELB -> Elastic Beanstalk mod_wsgi ...
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1answer
156 views

AWS ELB Latency issue

I have two c3.2xlarge EC2 machines with Ubuntu environment both in us-west-2a AZ. Both contains same code with mySQL database from AWS RDS (db.r3.2xlarge). Both instances are added to an ELB. Both has ...
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1answer
55 views

AWS ELB with ipv6 fails on online tests

I have an ELB with ipv6 AAAA DNS configured on route 53. The problem is that the tests I used tell me it's not ok (I don't have an ipv6 connection for testing): AFAIK I don't need to configure ...
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35 views

ELB to tomcat https redirecting to http

So we have tomcat servers behind a AWS ELB. Everything is working fine with https except if we manually type in this address: https://example.com/web/ This works fine... https://example.com/web ...
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1answer
39 views

EC2 instances single public subnet - VPN Successful But no internet

I have successfully established a VPN connection to VPC EC2 Instances (Windows), which reside in single public subnet. But, both instances cannot ping Google or each other. Is it possible to assign a ...
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40 views

AWS ELB is adding http absolute path

We have tomcats running a Spring Security webapp. The https is terminated at the ELB (443), then forwarded to tomcat on 8080. However, when we log in, a successful login redirects us to ...
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1answer
51 views

AWS ELB logs missing requests

We are trying to match requests made to our backend instances with logs from our ELB. Our application server logs clearly indicate that certain requests are coming in, but the matching requests are ...
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1answer
46 views

AWS ELB not configuring properly with EC2 instance

I have a working EC2 instance I'd like to place, along with a copy, behind an Elastic Load Balancer, but I can't get it to work. ELB Settings: Ports: ELB HTTP:80 -> EC2 HTTP:80, default VPC ...
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2answers
71 views

Force SSL redirect with AWS decrypting SSL on an ELB and routing to Nginx/Passenger

Currently we are creating a new environment and are running into some quirks with SSL. We are using an ELB that accepts 80/443. Both route to the same port on an Nginx box (ELB Decrypts). On the Nginx ...
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2answers
48 views

AWS ELB health check failing when trying to force HTTPS through NGINX for my single page application

I'm trying to force https on my http endpoints using NGINX like so: server { location / { root /data/www; if ($http_x_forwarded_proto != 'https') { rewrite ^ ...
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1answer
47 views

AWS ELB + NGINX for rails app

If I'm using Amazon's Elastic Load Balancer for a Rails app, do I need to put an Nginx reverse proxy between the app and the ELB?
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60 views

Amazon RDS and Auto-Scale EBS: Security Groups

I have the following setup on Amazon AWS: An Auto-Scaling Group An ELB An RDS database Everything is in the default VPC The only thing about this setup that I don't quite understand yet relates to ...
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3answers
104 views

Passing multiple https domains through Elastic Load Balancer

I just moved a site from one domain to another. It's still on the same servers behind an AWS Elastic Load Balancer. I also changed the certificate on the load balancer to one for the new domain. The ...
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118 views

Amazon ELB https termination results in 504 for large file uploads

I've stumbled upon the following issue and can't seem to find a solution. Setup: IIS server behind Amazon ELB setup to terminate SSL connections on the ELB with a setup of https 443 -> https 443 ...
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1answer
358 views

Can I use the new free SSL/TLS AWS certificates without ELB or Beanstalk on plain EC2?

AWS just announced free SSL/TLS certificates here: https://aws.amazon.com/blogs/aws/new-aws-certificate-manager-deploy-ssltls-based-apps-on-aws/ Mainly: SSL/TLS certificates provisioned through ...
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1answer
337 views

How to add AWS ELB access logs to logstash with S3 input?

I'm using an ELK stack for server monitoring. My application's access logs which are from AWS ELB are stored in AWS S3. I am trying to add them to logstash with the following input: input { s3 { ...
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36 views

Understanding AWS ELB, multiple ELB per subnet or one ELB per subnet?

So I'm trying to setup a production site and I'm new to the devops world. I have a setup that consists of four components: 1) Node.js API Server 2) Memcached Elasticache cluster 3) Postgresql RDS 4) ...
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4answers
82 views

SSL certificate for CNAME redirected domain

I have a webservice which provides simple site constructor functionality with payment page. User can select purchase domain e.g. user.com, select some template and point this domain with CNAME to my ...
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114 views

Intermittent ERR_INVALID_CHUNKED_ENCODING

I have a Node.js application running in two AWS instances behind a ELB instance. Every now and then, I get errors such as ERR_INVALID_CHUNKED_ENCODING or ERR_CONTENT_LENGTH_MISMATCH. This is observed ...
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2answers
34 views

Loadbalancing a root domain redirection web server hosted in EC2 to remove SPOF

This may seem quite obscure and perhaps quite niche but bear with me. The situation is: www.domain.com points to infrastructure in EC2, specifically an ELB domain.com points to a micro instance in ...
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1answer
69 views

ELB level Sticky sessions AWS

Would like to know the real benefit/advantage of configuring sticky sessions @ load balancer level in AWS.. i understood from the AWS documentation that the user request will be routed to a specific ...
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1answer
146 views

Is it possible to use Kerberos over TLS through sssd?

Background I am trying to log in (via SSH, to an Amazon Linux EC2 instance running sssd) as users that I've created in my AWS Directory Services Simple AD. I am authenticating with Kerberos and ...
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13 views

Apache 2.2 Prefork generating many connections without load

I'm observing a problem where Apache 2.2 is starting up a tremendous amount of extra threads between 2:45 AM and 3:00 AM each night. I've gone through all the usual troubleshooting, and can't find a ...
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49 views

EJB Remoting Auto Scaling in AWS

I'm currently in the process of figuring out how to migrate a Java EE Middleware application from a single static server to a Load Balanced Wildfly Cluster in AWS (with an Auto Scaling Group behing an ...
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1answer
331 views

How to log original value of $remote_addr when using Real-IP

My environment has user requests passing through a number of systems: [Client] --> [ELB] ---> [nginx] --> [web] (ELB = AWS Elastic Load Balancer) Thanks to this answer, I have nginx determining and ...
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2answers
97 views

Wildcard SSL Certificate on Multiple ELBs in VPC

I am very new to installation of certificates and AWS itself altogether. Now, in my current infrastructure I have 3 ELBs that are in a VPC. I have purchased a wildcard ssl certificate from COMODO ...
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1answer
43 views

Using CloudFormation, I cannot get an AAAA record to work with ELB

I have the following two CloudFormation resources: "TestELB" { ... }, "TestRecordSetGroup": { "Type": "AWS::Route53::RecordSetGroup", "Properties": { "HostedZoneName": "example.com.", ...
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1answer
121 views

Amazon Web Services, mod_remoteip behind VPC hosted ELB occasionally sending IPv6 addresses

On Amazon Web Services, I have an EC2 instance running Apache and mod_remoteip. The instance is behind a Virtual Private Cloud (VPC) hosted Elastic Load Balancer (ELB). In the mod_remoteip config ...
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1answer
45 views

PHP sessions without an expiration period. What happens to the sticky session on the load balancer?

I'm using PHP sessions without an expiration period, using Amazon EC2 Elastic Load Balancing with Sticky Sessions.. What happens to the generated application sticky session on the load balancer? When ...
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20 views

AWS internal ELB security with open security group

I'm just wondering whether anyone can tell me whether there are potential security considerations with internal ELBs setup inside a VPC which has an internet gateway attached. The security group I ...
2
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0answers
30 views

AWS ELB: cloudwatch metric for open connections?

I'm setting up ELB, and I'm having trouble finding a suitable metric to use to adjust the size of the pool. RequestCount doesn't work because some requests are much cheaper than others. Latency ...
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1answer
254 views

AWS ELB+Reverse Proxy (Nginx)+ELBs: Force SSL

I've reviewed/attempted prior suggestions found on the web to no avail. I currently have an ELB setup in front of my Nginx reverse proxy which then passes traffic onto 3 distinct ELBs which reside in ...
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1answer
73 views

ELB reports backend_status_code of “0” for some requests

I found some weird entries in my ELB logs that I can't really explain. They all look like this (parsed into JSON): { "backend": "-", "backend_processing_time": "-1", ...
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1answer
87 views

ELB is as slow as its Idle Connection Timeout setting

I'm trying out ELB with a minimal configuration (HTTP 80 -> 3000), and for one just one EC2 instance. (I know that normally one would put at least two EC2 instances, but I'm just assessing ELB.) ...
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1answer
191 views

AWS - ELB - NTP - Unable to forward UDP Traffic?

I am trying to setup two micro-instances behind an internal ELB which will handle mundane tasks such as central logging and NTP queries, but come to realize that ELB doesn't support UDP forwarding. ...
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12 views

How to re-spawn Opsworks instances when heartbeat fails?

I have a Rails app on Opsworks with two instances. My understanding from AWS Opsworks auto-healing, load instances, and load balancer is that the ELB is monitoring the application heartbeat and will ...