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

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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
52 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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31 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
68 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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29 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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20 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
42 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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0answers
29 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
26 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
33 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 ...
6
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1answer
81 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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11 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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0answers
18 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 ...
1
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1answer
67 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
47 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
24 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
97 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
20 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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0answers
16 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 ...
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0answers
22 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
85 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
45 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
49 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
79 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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7 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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51 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 ...
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1answer
158 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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36 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
256 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
19 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 ...
2
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1answer
165 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
33 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
78 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
58 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
152 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. ...
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1answer
38 views

Change amazon's ELB domain name to my own domain without it changing upon resolving it

I'm trying to set my own domain name as an alias for the generated DNS by Amazon's ELB. The generated DNS is not good for me, since I've purchased a certificate for my domain (www.domain.com). ...
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0answers
112 views

Tomcat 8.0.43 not using Keep Alive

I'm trying to setup a few app servers behind Amazon's ELB and I've been getting some 504 errors that I've been tracking down. Looking at the Tomcat manager app under status, I'm seeing the following: ...
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0answers
99 views

Varnish configuration with Apache webserver in AWS ec2 free tier

I have AWS ec2 free tier where i have deployed my sample. I have configured the webserver to listen on 80 port. I am able to access the application by the below URL http://X.X.X.X/SampleApp But ...
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0answers
60 views

certificate does not match name aws private ip

Using AWS ec2 with a load Balancer and elastic IP. Im trying to add and SSL certificate but getting the following error. Certificate does not match name shop.domain.com Subject ip-172-31-19-115 ...
1
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1answer
229 views

ELB health checks for freshly launched EC2 instances not working

I'm trying to manually set up a load balanced environment using EC2. My instances are reachable via SSH and ping. However, as soon as I put them inside a load balancer, the instances are not able to ...
2
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1answer
718 views

is there a standard for chaining x-forwarded-for headers?

IETF RFC 2616 Section 4.2 allows a request to contain multiple headers with the same field-name as long as chronological order of insertion is preserved and their values can be converted into single ...
4
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1answer
177 views

How does nginx distribute traffic among IPs associated with an upstream DNS name?

With this configuration: upstream some_upstream { server some-elb.us-east-1.elb.amazonaws.com:80; } If some-elb.us-east-1.elb.amazonaws.com maps to 2 IP addresses, how will nginx distribute ...
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1answer
230 views

AWS ELB SSL and Health Check Issue

I'm getting very frustrated trying to sort this issue out. We have an AWS environment that uses SSL certificates at the load balancer. We also have a rewrite rule in httpd.conf that redirects all ...
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0answers
62 views

AWS ELB and forcing Https

I have an ELB which in the first place was set to forward in this way: Protocal Port Forward-Protocol Port Http 80 Http 80 Protocal Port Forward-Protocol ...
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2answers
144 views

Cannot put application back into ELB: Instance has not passed the configured HealthyThreshold number of health checks consecutively

Putting the EC2 instance back into the ELB used to work 90% of the time. Unfortunately lately the deployment regulary fails with the next error: 15:51:59 TASK: [Start the app] ...
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51 views

Is it possible to use an Elastic Load Balancer on an IIS Server accepting BITS Uploads?

I have a website hosted on EC2 using IIS 8.5. I've got a virtual directory with BITS uploads enabled, and everything works over http and now https when my URL points to the instance's public EIP. The ...
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2answers
389 views

How to set “server preference” for tls cipher suites?

Mozilla has a tool to generate server configurations at Mozilla SSL Configuration Generator. For Amazon Elastic Load Balancing (ELB), the configuration does not appear to have a setting for "use ...
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1answer
261 views

Retrieve clients geolocation info from AWS ELB?

Forgive me if this question is in the wrong place; had difficulty deciding whether this belongs on SO or SF. Since I'm not asking for code, I guess here would be the best place. We want to be able to ...
0
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1answer
19 views

With PROXY support enabled in ELB, are occasional non-PROXY connections to the EC2 instance still possible?

We have PROXY protocol support enabled on our ELB but we seem to be occasionally getting non-PROXY TCP connections to the EC2 instance behind the ELB. The instance's Security Group only allows ...
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2answers
378 views

How to run a java jar file on Elastic bean stack

Currently I am using elastic beanstack for drupal application and choose the “Web Server” environment it is pre-defined configuration that uses PHP 5.5 with Apache. I need to deploy the java API ...