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Questions tagged [load-balancing]

Load balancing deal with the techniques involved on using multiple systems to deal with high demands, balancing the load between those multiple systems. Questions deal with networking and server load balancing, using dedicated hardware or not.

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IIS “Server Unavailable” Response Type (loadBalancerCapabilities) and Amazon Web Services

IIS app pools have a property listed as '"Server Unavailable" Response Type", and having the name "loadBalancerCapabilities" in their IIS schema, which can take either of the values HttpLevel (default)...
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Low Benchmark Results on External Server to Load Balancer [closed]

I created a Load Balancer. When testing internally in the Load Balancer Server using wrk, I received a benchmark of 300,000 Requests Per Second.. Then, I created a droplet in Digital Ocean and ran the ...
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Do I need an SSL certificate on my EC2 server even when I have a load balancer?

Starting to setup a Load Balanser in AWS, I ran into some additional questions. Basically I have a web site/app deployed in an EC2 instance. I'd like to make it secure by using an AWS generated cert ...
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Using Apache HTTPD mod_proxy_balancer for many vhosts

I have an Apache httpd 2.4.34 configuration with many vhosts (~4000) mostly used for redirecting and SSL-offloading using mod_proxy to access the backend. Now I want to switch to mod_proxy_balancer ...
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1answer
40 views

GCP Firewall - Deny by User Agent

Is it possible to block user agents in the Google Cloud Platform Firewall? I have a specific one I require to block. However as I offload SSL to the Load Balancer it is that which makes the request ...
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1answer
41 views

What application structure for Load Balancing HTTPS/Websockets with many domains on AWS with Docker

We are having an application that heavily relies on websockets. As our Application is software-as-a-service, our clients can use their own domains (and forward them via CNAME to our servers). At the ...
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1answer
24 views

AWSApplication load balancer - custom headers

I have question regarding AWS ALB. Does anybody knows if it is possible to modify (specifically ADD) custom headers to requests? Something like proxy_set_header in nginx http://nginx.org/en/docs/http/...
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26 views

Load balancer & SSLs

So I'm trying to load balance 2 servers, however I'm having the following issue with SSL. My customers add their own domains via the cPanel API, they need to be on SSL. Previously with one server, ...
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Apache load balancer: health check with long timeout

I'm using Apache HTTP Server as a reverse proxy for a couple of Tomcat instances. I've setup load balancing as follows: <Proxy "balancer://tomcat-app"> BalancerMember "http://10.0.0.1:8080" ...
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1answer
40 views

Estimating concurrency limits for an AWS architecture running WordPress

I'm trying to estimate a number of concurrent users a WordPress AWS setup can withstand (that needs to be highly available and support huge loads). I am asked for a loose range that I would say we can ...
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27 views

Apache Kafka configuration behind NAT/LB

In order to make our Kafka cluster available both from Internet and from our private network, we thought fine to configure Kafka this way : Private VIP:9000 => All brokers:9092 (topology query ...
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Load balancer + COM = Access is denied

I am part of a software development team that develops an in-house desktop application and we are facing the following issue since two weeks ago: A load balancer (Netscaler) was enabled in our ...
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How to use HAProxy as a load balancer for LXC containers running nginx for HTTP and HTTPS requests?

Ok so i'm running two different sites one on the main domain xyz.com and test.xyz.com i want xyz.com to use https and i want test.xyz.com to run on simple http. I'm running each site on different lxd ...
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1answer
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Allocating Game Servers Across Dedicated Servers

I run a small game server hosting business for a niche game, and I rent dedicated servers to keep costs down, each of which runs many game server instances. Game servers can be created and deleted at ...
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1answer
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How to connect to my server from AWS device farm when limiting the device farm ip range to 54.244.50.32/27?

We have a classic load balanser that's configured to allow TCP traffic on port 444. We have a security group configured that allows TCP traffic from 54.244.50.32/27. If we open up the traffic to the ...
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How can I have nginx determine the subdomain when it's behind a load-balancer itself

I am currently on Linode with 3 back-end production servers behind a Node Balancer. I have the site's domain.tv and sub.domain.tv pointing to the Node Balancer's IP. The Node Balancer points to local....
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2answers
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Migrating Load Balancer from hardware software

We're currently using OVH Load Balancers to serve our LAMP stack webapplication. The problem is, that OVH LB services are really not that great and is down too much. The servers are also located ...
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F5 BigIP - HTTP Header Log Based on User-Agent Condition

I'm a completely F5 newbie F5 trying to script an iRules to log the HTTP Headers if the User-Agent contains "Mozilla": when HTTP_REQUEST_RELEASE { if { [HTTP::header "User-Agent"] contains "...
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1answer
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How to synchronize 2 GCE VM instances in an Instance Group on Google Compute Engine?

I plan to setup an environment on Google Compute Engine using Managed Instance Groups. I will be running Linux on the VMs. I am new to Google cloud and am unable to find a method to keep all copies ...
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Apache Load Balancer — How to know which Route was chosen on 1st pass

I am using Apache 2.4.x to Load Balance (mod_proxy) for AB testing to slowly introduce a new server while we retire an old server & service. Everything I need is working, except for a small issue ...
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3answers
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Azure high availability solution with synchronization of website and SQL server data

We have a web solution that we sell and it comes with 1 dedicated Azure VM containing everything it requires to run the application: ASP.NET web application Production environment QA environment SQL ...
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Apache 2.4.18 (RedHat) Failonstatus Directive Not Shutting Down Worker Node w/ 503 Status Error

Overview - RedHat 6 - Apache 2.4.18 - Dell Boomi Status Code 503 Atom is shutting down I have an Apache httpd24 web server running mod_proxy and mod_proxy_balancer. My test includes 2 worker nodes ...
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1answer
32 views

Network Load Balancing configuration

I'm configuring Windows Network Load Balancing between two SharePoint servers which are in the same NLB cluster, but I want to have the first server for users and second for services (and for users ...
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1answer
49 views

DigitalOcean load balancer health checks flooding my CodeIgniter sessions

I've been trying to figure this one out for a while now, but so far no success. After contacting DigitalOcean support a couple of times, I'm even more lost. I have the following setup: domain points ...
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1answer
128 views

HAProxy 504 Gateway Time-out Exchange 2016

I have been trying to use HAProxy as a proxy and load balancer for my 2 Exchange 2016 mail servers. Whenever I hit the IP of the HAProxy server I get a "504 Gateway Time-out" error. I have tried ...
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Assign a single resource provider with apache load balancer

I have an apache service with a load balancer using ProxyPass and ProxyPassReverse and I use it to balance the load of a certain website between 2 servers. The problem is there is I have a caching ...
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My Haproxy LB not show real statistic

i have issue with statistic of haproxy loadbalancer. i have four backend servers with one load balancer. after a few hours from restart services in haproxy load balancer, statistic from the haproxy ...
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1answer
111 views

Google cloud cdn - unclear cache hit ratio

I'm using google cloud cdn (Load balancer with a backend service) and the hit ration status is not very clear. In the image below you can see: Left image - CDN view - Value of cache hit ratio is "n/...
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26 views

Nginx epoll_wait() issue under load test with Load Balancer

I'm using JMeter CLI to load tests our micro services (Nginx+PHP-FPM+Laravel). Micro services are all under an AWS Application Load Balancer which performs a health-check. For that micro service, ...
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1answer
73 views

How to use “Set weight” in HAProxy

Hi I have configured an HAProxy server in haproxy.cfg to balance the traffic flow between two servers, say server web1 10.10.10.10 weight 50 server web2 10.10.10.11 weight 50 For testing purpose we ...
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1answer
42 views

Why should Cloudflare LB point to another AWS/GC/etc. LB?

I am aware Cloudflare has a security focus, but considering it also provides load balancing, why should I have it point to yet another load balancer e.g. AWS ELB?
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Azure Load Standard Public Balancer load balancing to unhealthy or removed VM

We have a highly available website which we are trying to migrate to Azure. We basically have an Azure Standard Load Balancer with a public IP and 2 VMs in the backend pool. We have noticed that if 1 ...
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nginx: resolver does not refresh after dns update

We've had an issue today with the nginx resolver in an AWS environment. According to the nginx log files, nginx did not resolve to the right servers, after the DNS record changes. The DNS originally ...
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DNS layer with service discover as resolver not SRV

I need to know is there any solution for solving my problem. I have a BIND DNS server and consul as service discoverer. This is what i want as simple diagram: How can I configure this sample setup ...
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1answer
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How can we use capacity-based load balancing in our physical data center?

We are planning to have multiple high-capacity servers with the same application configuration (data analysis pipeline) and would like to send requests including a data stream to each server, based on ...
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Google cloud load balancer not returning Content-Encoding: gzip

I'm using google cloud Load balancer that sits in front of an nginx backend service (in google cloud terms). When i'm accessing the nginx server directly i can see the 'Content-Encoding: gzip' header ...
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1answer
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Can you use SSL termination in conjunction with a Layer 4 load balancer?

I have an internal load balancer to balance internal traffic to my Kubernetes cluster (hosted in GKE). According to the Internal Load Balancer documentation, it only balances L3/L4 traffic. I need to ...
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1answer
71 views

AWS LBS maximum request rate does not clear

In LBS I have message " "A request made to AWS Config exceeds the maximum request rate permitted for your account." Unfortunately I do not know what is my current limit. I found this page but it does ...
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What is optimal hardware configuration for LAMP video application [duplicate]

I need to run Linux-Apache-PHP-MySQL video application (Video calling platform) for a 40 concurrent video calls - I am aiming 120 users (3 on a video call so there will be 40 concurrent video calls ...
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2answers
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what is service mesh in container Load Balancing?

When i read about Load Balancers & containers.Looking for clear understanding of service mesh in Load balancer and how it is useful in containers.
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SSL implemation

So, i know we can enable SSL on the AWS Application load balancers. But the set up here is, the connections terminates on an on-prem f5 loadbalancer. The traffic is then routed to an internal(private) ...
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2answers
82 views

Https not working on AWS EC2 with ssl certificate installed

I Have insatlled ssl on my aws but not able to load my site on https https://darkcloud.app (My site) Certificate load balancer Route 53 ubuntu@ip-172-31-8-134:~$ curl -v https://www.darkcloud.app ...
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Pointing to ELB in Route53: A record (via ALIAS) vs CNAME

there is a weird problem with my application. A Classical Elastic Load Balancer sits in front of my application servers, which are EC2 instances. I point my sub-domain to the ELB in Route53. Case 1: ...
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Autoscaling cloud web applications- what method do people use to establish which metric is most suitable to scale off?

I understand with applications hosted in the Cloud, autoscaling is now a very popular method of ensuring applications can scale based on fluctuations load/work. From my reading, I know that most, if ...
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Is there a way in Rancher to schedule services by “groups”?

Rancher v1.6.x, under Cattle, already on HA. I'm mostly asking about a workaround or some great idea I couldn't figure. Of course, Rancher doesn't have this "groups" concept. I have 8 hosts in my ...
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Multiple certs on an ELB listener. Nagios monitoring only checks the default one, regardless of host name

So I have two sites running, each behind a single Amazon ELB. For the purpose of this post (and my companies privacy), using these hostnames for each: example.com anotherexample.com Certs are ...
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2answers
452 views

HAproxy health check for https backend

I have haproxy configuration that works perfect for vault server in the backend with http configuration and it load balance based on unsealed and active vault server using 200 OK code. This works for ...
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1answer
21 views

Nginx loadbalancing, Is there a way to do this?

I want to use a test server for administrators. Is there a way to assign an access from the client of ip(123.0.0.1) to the server of ip(123.0.0.2)? upstream target-server { server [123.0.0.3] ; ...
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136 views

Configuring correct firewall settings for GCP HTTP load balancer

I have two VMs running HTTP servers on port 8545 as shown in the figure and placed in an instance group. I created a HTTP load balancer in GCP to balance HTTP requests from end users. However, with ...
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1answer
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AWS Elastic Load Balancer- two web applications in cluster in different autoscaled groups- one load balancer or two?

I'm wondering what the recommend practice would be in this scenario. If I have two web applications on the same VPC network (essentially in the same cluster) in two different autoscaled groups, would ...