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

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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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22 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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43 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
34 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
141 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
41 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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29 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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37 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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0answers
33 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
43 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
39 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
51 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
39 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
35 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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48 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
90 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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92 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
240 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
241 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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32 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
69 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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85 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
32 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
61 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
129 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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41 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
236 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
80 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
37 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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117 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
40 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
28 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
196 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
61 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
79 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
147 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 ...
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0answers
92 views

Cloudformation ELB Cloudwatch Alarms InsufficientData

I have setup a bunch of cloudwatch alarms for my service using cloudformation. All my alarms work except for the ELB alarms. They always just show insufficient data. I can go into the console and ...
0
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1answer
307 views

How to set up AWS Cloudfront for dynamic number of domains for a dynamic site?

THE SETUP We have a webs/wix/etc-like website management system we are trying to use with CloudFront. It has the following domains and subdomains. - ourdomain: our main website - admin.ourdomain: ...
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61 views

Elastic Load Balancer Nginx and Rails

Currently we use Elastic Load balancer which hits Nginx then finally rails (nginx and rails both run on the app server). The idea is to use the connection pooling functionality of Nginx. Do we need ...
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1answer
403 views

Grok Issue with Multiple IP's in NginX Logstash

i've got an issue with logging from my webservers, which has an elb and then a varnish layer in front of nginx layer. varnish is setup properly for X-Forwarded-For and logs come through normally with ...
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0answers
21 views

How could I dispatch the request by instances' type dynamically

How could I dispatch the request by instances' type dynamically I have a ELB contains an auto scaling group and an indenpendent ec2 machine However the indenpendent ec2 machine is t2.large and ...
3
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1answer
318 views

Map one AWS ELB load balancer port to balance to multiple instance ports?

Lets say I have multiple processes running on multiple EC2 instances each on different ports. Can I map a single AWS ELB to balance to any of these processes across any instance? For example, I'd ...
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1answer
55 views

Prevent AWS load balancer serving on IP address

I've configured a Amazon Webservices Load Balancer for my site. It's all good the domain name resolves to the IP address of the Load Balancer Endpoint, and on the internal LAN it communicates with my ...
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1answer
127 views

Grace Period? - AWS EC2 Container Service and Elastic Load Balancers

When an elastic load balancer (ELB) is associated with an auto-scaling group, it is possible to specify a grace period during which new EC2 instances will not be terminated even if they are marked as ...
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1answer
62 views

Migrating from nginx to Amazon ELB

I'm interested in migrating from a manually managed AWS EC2 cloud with multiple webapps to AWS ELB with auto scalling. However, I'm not sure whether a single ELB will be enough to handle my ...
0
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1answer
245 views

Can't access AWS ec2 instance behind elastic load balancer

I've been following lynda.com's AWS essential training and I've successfully set up an EC2 instance but when I try to put it behind a load balancer I can not access it through the ELB's public DNS. ...