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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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Correct log format dependent on route

I have a few virtual hosts running on a server, a couple are through a CDN and have X-Forward-For added to the headesr, sometimes it just goes through a load balancer where RemoteIPHeader is added. I ...
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NIC team not load balancing

I'm trying to achieve a load-balanced NIC team on a Windows Server 2016 machine. This is a ProLiant using a 4x 1Gb 311FLR interface card which as of yesterday has the latest driver installed (100.20.0....
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Partitioned access to configure Alteon Radware load balancer via API

I have a client with an Alteon Radware 5224 load balancer. I'm trying to determine if you can create an account on the load balancer that can be set up to only administer one virtual server and its "...
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Round robin DNS in public network [on hold]

Is it possible for round robin DNS to work in public internet? I mean if it is possible that when one person connect to a public website with browser using domain name, and sends the DNS request the ...
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HaProxy Configurations Error while setting up multi proc environment

I want to achieve 6000/sec Requests and trying to setup HaProxy with muli proc Settings but Getting this Error. cpu-map expects a process number including 'all', 'odd', 'even', or a number from 1 ...
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54 views

Round-robin outgoing TCP requests between multiple Ethernet adapters on Windows

I have a Windows Server Standard with 3 Ethernet adapters. I am running a C# application that makes TCP connections to another server. Right now they are all made via the adapter that has a default ...
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1answer
111 views

AWS Lambda as an Application Load Balancer target?

At AWS’ 2018 re:invent, AWS announced that Lambda functions can now be the target of Application Load Balancers (documentation here). I just want to ensure that I understand AWS previous offerings (e....
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35 views

Hide EC2 Instance Behind Load Balancer

In AWS, I have an EC2 instance which currently allows incoming traffic on port 80. I am hosting an API on this instance and so currently I can hit the API endpoints using Postman at the public IP of ...
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Connect from ec2 instance by alb to app to the same instance

My scenario: I deploy a application in AWS on e2 instance on some port: I create a network loadbalancer (application use a tcp protocol) with target group. Also this instance is in autoscalling group ...
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21 views

Apache httpd load balancing based on other server availability

We are implementing a real-time WebRTC - RTP video solution at a customer, using 3rd party vendor components and customer components. I am trying to find out if it possible to handle a corner-case ...
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1answer
20 views

Can we make AWS ALB forward request from a single user to the same target always?

I'm new to AWS ALB and I have set up an AWS Application Load Balancer along with ECS cluster with 2 EC2 instances. The entire architecture works fine. But later I find that the API calls from a single ...
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Kubernetes service vs Load balancer

A service in kubernetes is a object representation that is used by kube-proxy to link the VIP of the service to one of the containers behind the service. This can be done by several kube-proxy modes ...
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How to Nginx upstream on single server with additional IP addresses added to NIC?

I am having a single dedicated server (static IP) with two additional IP addresses added. When I run SSH with command: cat /etc/network/interfaces I got this result: auto lo iface lo inet loopback ...
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GCE Kubernetes and Load Balancer http to https

I have hired a DevOps to setup my infrastructure on GCE. We have decided to use Kubernetes Engine for our App. My DevOps has setup multiple load balancers and is using ingress. The issue is that he ...
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HAProxy (or any lb) - can you redirect based on path without SSL termination?

I'm looking to decouple the marketing (logged out) portion of a website from the main logged-in app, without having to use subdomains. I believe I can do this with ACLs in HAProxy, and potentially ...
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32 views

How to setup website across multiple web servers (with load balancer)?

I am trying to use two web servers to run my website (as opposed to the one I use now). I can easily create another LEMP stack on my hosting provider (Digital Ocean) and setup a load balancer to ...
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multiple wordpress instance loadbalancing

What is the best way to have multiple wordpress nodes behind a loadbalancer? I was trying to use mod_proxy_balancer with apache2, but somehow BALANCEID cookie was not working properly, so before I ...
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38 views

Network Load Balancing Cluster in a bridged network

I have three virtual machines (Virtualbox if it matters). They are all connected using bridge mode. (They also have a second NAT adapter if it matters) I configured a network load balancing cluster in ...
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1answer
30 views

Load balance PHP-FPM with HAProxy resulting in service unavailable

I need to load balance PHP-FPM with two backend servers with HAProxy (with Apache running on those backend servers as well). I have this frontend: frontend fr_fpm bind *:9000 mode tcp ...
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GCP Internal Load Balancer not responding

I am trying to reach GCP Internal Load Balancer from external network connected via 3rd party Pritunl-OpenVPN tunnel (tunnel endpoint is on VM). [external network] <------- Pritunl VPN ----> [GCP ...
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1answer
12 views

Why the 'uptime' command showing the load output faster than the 'w' command

Why the 'uptime' command showing the load output faster than the 'w' command. I am unable to use the 'w' command in high load environment but the 'uptime' shows the results more faster..
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How does nginx track least_conn for load balancing?

When using least_conn and nginx load balancing, does the load balancer keep a running list of connections or does it poll the upstream servers every time it needs to load balance something and get the ...
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Create a reliable architecture to avoid downtime

Today I have several droplets (VPS) on DigitalOcean for single tasks, one VPS for each task: Apache / PHP PostgreSQL NodeJS ElasticSearch Exim Unfortunately these days one of these droplets went ...
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Do I need external IPs for Managed Instance Group instances serving as a GLB back-end?

(Related to Why do I need an external address to make an internal connection between GCE instances?) I have a MIG that serves as a GLB back-end. The health-checks for both the MIG and the GLB back-...
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Stuck at setting up full proxy with HAProxy

I have gone through various answers on this forum and others and tried to debug my HAProxy configuration- alas no success. I am newbie at HAProxy and am facing challenges getting it to work the way I ...
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Error with galera load balancer port

I have two machines VNDMARIADB01 172.22.126.21 VNDMARIADB02 172.22.126.22 I have configured a Galera cluster in the first machine and Mariadb (in port 3307), both machines have a mariadb node ...
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32 views

Google Cloud GCP Load Balancer standard tier pricing

I want to reduce my k8s GCP load balancing costs for CI/CD purposes, so looking for an explanation of pricing for a Load Balancer in the standard tier. I have read through https://cloud.google.com/...
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Local network interface and iptable load balancing

I am trying to configure iptable on my router but without succes. The situation is like that : Four local interface, one gateway. Because of these interfaces are tun devices, I cannot create a ...
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2answers
41 views

An Application Load Balancer with fewer Instances than Availability Zones?

Is it important to always have an ec2 instance in each zone of your load balancer? Are there advantages to having more than two or three zones? We set up our application in an EC2 AutoScaling Group ...
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1answer
46 views

Enable communication between Azure virtual networks

I have an Azure subscription with 2 different resource groups, Test and Prod. Each resource group has a VNET with a bunch of VMs in it. There is a VM in Prod that acts as a license server, and ...
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1answer
45 views

GCP Https Load Balancer SSL Certificate

I am trying to create a Https load balancer using yaml and Jinja files on GCP deployment manager. But I am not sure how to provide SSL certificate. In the "sslCertificates" of "compute.v1....
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42 views

Loadbalancer targetPort not forwarding to daemonset hostPort if port not same as hostPort

I have the following setup: A loadbalancer points to an ingress controller as daemonset, running in a gcp-kubernetes-cluster, as seen in the example below: apiVersion: v1 kind: Service metadata: ...
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81 views

Coturn server behind AWS application load balancer

I'm trying to make coturn server work behind an AWS application load balancer. I'm using icetrickle to test it and the coturn seems that works as expected if I skip the load balancer and I hit ...
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AWS - Four load balanced t3.micro vs one t3.medium for a NodeJS API

I'm trying to decide which of the two setups would be get me more price/performance value with the consideration that I will run a NodeJS API in cluster mode: All prices are current rates for ...
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1answer
41 views

Can one device simultaneously be a reverse proxy, load balancer, and firewall?

From my understanding you have: Reverse Proxy: A device standing between internal servers and the internet. Some goals: SSL termination, caching, obfuscation, more freedom to change internal ...
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1answer
306 views

Can't SSH into AWS CloudFormation Stack Instance

I have a scalable load balancer set up right now that was mostly followed from this template: https://github.com/satterly/AWSCloudFormation-samples/blob/master/LAMP_Multi_AZ.template After adjusting ...
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Load balance url_param with openshift router

I would like to load balance between pods for some urls for my app with balance url_param on openshift origin. I know this is an option on haproxy, which the openshift router use, but I don't see ...
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1answer
80 views

nginx - redirect based on port number

I want to use nginx as a load balancer to distribute load over 2 servers. I have done this in the past, but am stuck with a specific requirement. I need to forward the requests onto the servers (from ...
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1answer
38 views

Cannot set-up SSL termination after changing subdomain

I've been working for a while on a web application that has lived on two load-balanced DigitalOcean droplets (using a DigitalOcean loadbalancer, not my own load-balancing droplet) with SSL termination....
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22 views

How do I configure Azure Load Balancer to forward traffic to an external endpoint?

I have a few of the same public endpoints exposed which I'd like my load balancer to route traffic to, but I can't figure out how to specify a backend pool that consists of these external endpoints - ...
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38 views

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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2answers
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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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27 views

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
72 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
49 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
70 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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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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1answer
79 views

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
45 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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143 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 ...