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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HAProxy RTMP (TCP) load balancing

I am using HAProxy as load balancer for the RTMP protocol. For now it's working very very good but I have one small problem. I want to send the client's IP on the RTMP request after the load balancer. ...
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1answer
39 views

nginx proxy_redirect websockets, not proxy

I have been able to successfully set up nginx as a load balancer to proxy websocket requests (with SSL), however, really I think I need to be able to redirect them. My desired configuration is to ...
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19 views

Splitting HTTP/HTTPS traffic with SSL Termination in Rackspace Load Balancer

I've got a Load Balancer (LB) set up, with the SSL certificate installed, and a Cloud Server sat behind it serving my site. If I visit a static file in the site, with http:// or https:// it gets ...
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3answers
442 views

How does Linux distribute load on multiple CPU cores

Let's say I got 2 quadcore processors (8x 2,13Ghz). The server runs multiple programs which can only utilize 1 core + Nginx and Apache worker at the same time. The question is, does Linux efficiently ...
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1answer
25 views

Scaling a web application horizontally in Tomcat (load balancing / clustering)

I develop a simple REST-style web application consisting of 2 basic modules. Module#1: server exposing REST web services, stateless, deployed in Tomcat Module#2: REST client There is one Tomcat ...
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1answer
74 views
+50

How to share session resumption cache behind load balancer?

I scanned my servers' SSL/TLS configuration using https://www.ssllabs.com/ssltest/, and it reported Session resumption (caching) No (IDs assigned but not accepted) I'm using 2 instances of Azure web ...
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1answer
33 views

multi-wan problems with web services

I recently set up a multi-wan connection for a small company, because they are at the end of the line for any possible ISP, services do go down, and they really depend on their Internet connection. I ...
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43 views

Load Balancing over multiple ISP connections

I have been trying to implement load balance and fail over on a linux machine having multiple interfaces. Currently I am using two ISP lines and I wish to split the network traffic such that both of ...
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24 views

load balance adlds instances over two seperate azure vm's

I have two azure VMs, on which i have hosted two AD LDS instances, one being the replica of the other. I want to ensure load balancing and fault tolerance of the instances (if primary goes down, the ...
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21 views

Cannot able to Load Balance on Apache HTTPD Server with mod_proxy_balancer using Balancer Member with SSL Enabled

I am trying to Load Balance on Apache 2.4.7 using mod_proxy_balancer module. My below configuration is working perfectly fine. <VirtualHost *:80> # Turn OFF Forward Proxying or Open Proxy ...
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1answer
45 views

Keepalived load balancing MySQL. Backup server time-out

Dear beloved people at ServerFault. I'm trying (and failing) to setup a load balanced MySQL server array. Please enlighten me, show me the error in my ways. Current setup: two MySQL servers with ...
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1answer
32 views

Amazon RDS load balancing and performance

My question is simple. Is it possible to load balance rds (master and read-replicas) using the same haproxy instance used for application load balancing? This would mean that the IP of the ...
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1answer
27 views

Cassandra 2.x - cluster does not rebalance after adding new nodes

I had 3 nodes, all with ~550GB, and added 4 more. I hoped that data would migrate on its own from old servers to new ones. Unfortunately after one day, data seems to stay in old places. In parallel, ...
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1answer
43 views

Why is my nginx load balancer misdirect phpMyAdmin after login?

In my testing server, I have an nginx load balancer pointing to Apache server(s) running on the same machine, and I've installed phpMyadmin under Apache. My nginx config: http { upstream backend ...
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26 views

Having difficulties routing TCP via OSPF (quagga) generated routes

I have two isolated virtual machines (srv-a and srv-b) broadcasting their cluster address (10.0.1.253/32) via OSPF. A third virtual machine (router) with IP forwarding enabled is receiving these ...
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46 views

EC2 Haproxy stops taking requests

I am using haproxy with Apache to keep alive an EC2 server. Sometimes haproxy stops taking new requests. If I reload haproxy it starts working normally. I have disabled iptables and increased open ...
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0answers
30 views

Apache ReverseProxy sets upstream server to error when it returns an error page

We are using an Apache LoadBalancer/ReverseProxy to provide a failover for our web servers. Currently we are experiencing the following problem: A webservice call returns an error with HTTP status ...
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13 views

Indentifying where a HTTP 503 Service Unavailable is being generated

We have a Web Sphere server that Calls a web service on a Windows machine running IIS. The Call goes via a Blue Coat load balancer. The Windows machine is hosted on VM Ware. What we are seeing is ...
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1answer
31 views

Unable to use https on Amazon loadbalancer

I have a wild card certificate for a domain and have configured it on a load balancer. The load balancer has an EC2 instance assigned. I am using the domain name to point to the load balancer through ...
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1answer
96 views

Nginx load balancer is hanging on SSL

I'm trying to get nginx to do load balancing across my web servers, while terminating SSL at the load balancer level. The nginx.conf file I'm using is based on all the guides for doing this exact ...
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1answer
41 views

Setup an intelligent Round-Robin strategy

According to a lot of research - I discovered the design pattern Round Robin. It basically solves the idea I want to adopt. I want to have a pool with physical servers, each their own IP address ...
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1answer
49 views

Unable to resolve Amazon route53 domain name to loadbalancer

In AWS I have configured a load balancer to point to an EC2 instance and its working fine. Then I used route53 to resolve my domain to the loadbalancer IP. ex: "api.b1.example.com" The problem is ...
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1answer
29 views

HAProxy - Will HAProxy automatically reload list files?

I have text files with lists of ip addresses that I want to use to help determine to right actions to take with HAProxy. So if haproxy loads whitelists like this. "acl whitelist src -f ...
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18 views

Application Request Routing and Throttling

We have a set of WCF services that are proxying calls to another web service layer built on top of IBM WebSphere. The WebSphere setup is a black box to us, but we're told that we need to throttle ...
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1answer
163 views

ASUS RT N16 merlin-wrt dual wan load balancing

I have a ASUS RT N16 router, running on Tomato Shibby mod. I read that this firmware doesn't support dual-wan. Someone suggested using Asuswrt-merlin mod, but this too supports dual-wan only in ...
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32 views

F5 routes all REST requests from one client to same host

I have a rest webservice clustered behind an F5 using SSL Termination, SSL persistence and the balancing is "least connections". This service sees millions of messages per day. The vast majority of ...
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3answers
314 views

ESXi 5.5 NIC teaming for Load balancing using Cisco Etherchannel

I am using Cisco 3750G stacked switch configured with etherchannel and connected to ESXi Server configured with NIC teaming; Load balancing as router based on IP Hash. Cisco Switch configuration: ( ...
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2answers
48 views

Static IP in AWS but with possible Load Balance feature

I am playing a bit with AWS. My goal is to setup infrastructure, which will have static IP on outgoing connections (requirement from payment provider which solution has been implemented in our app) ...
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1answer
18 views

Browser Authentication Prompt After Server Restart

Details We have an internal website. The authentication mode is windows hence it takes windows logins. It is served from two windows servers running Windows Server 2008 R2. And are connected with ...
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1answer
14 views

Hot-spare using Pound

I currently have a server deployment in which Pound is being used as a reverse proxy (HTTPS -> HTTP) in front of a single server instance. I'd like to add a second instance on a different host that ...
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2answers
107 views

How do you force an Apache Load balancer to rewrite http 302 redirects to https?

I've got a website that I want to always be served in https. The site is load balanced using Apache. The Apache load balancer is configured basically like so: <Proxy balancer://mycluster> ...
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27 views

Maximum server attempts from upstream in Nginx

I have configured Nginx load balancing between backend servers. upsteam backend { server 127.0.0.1:8080; server 127.0.0.1:8081; server 127.0.0.1:8082; server 127.0.0.1:8083; } server ...
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3answers
53 views

Load balancing for a running server process with sessions

I'm developing a server application that accepts incoming connections and works with client applications. The customer wants to have two machines working: in case one goes offline, the second will ...
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2answers
202 views

How to construct a MongoDB Health Check in HAProxy?

There is a fastcgi example of a binary health check on the HAProxy blog. How would I construct a similar check for MongoDB such that I am doing a more robust health check for MongoDB - one that ...
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3answers
307 views

nginx - Load Balancer - Considerable lag when upstream node is offline/down

Running nginx 1.0.15 on CentOS 6.5. I have three upstream servers and everything works fine, however when I simulate an outage, and take one of the upstream servers down, I notice considerable lag in ...
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1answer
46 views

load balancing multiple connections over multiple links

As I understand it (based on the kernel docs) the setting of "arp_filter=1" necessitates the use of a source based routing policy to allow multiple interfaces to route traffic, potentially (but not ...
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1answer
33 views

ssl and loadbalancing : answer directly from backend?

Context debian 64bits. I try to learn https. I created a loadbalancer but I cannot answer tthe client directly from the backend since it receive the LB ip. Question I would like to know how I ...
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1answer
58 views

Multiple Proxy servers - and how to get around non-SNI devices?

We have a lot of devices that cannot use SNI and we want to be able to proxy a lot of HTTP/HTTPS servers. I was thinking we could setup a HAProxy for each URL to connect to initially, and then load ...
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1answer
74 views

How to proxy traffic by IP using server names/aliases?

We have 5 different server locations each containing around 30 servers each, each server represents a URL and serves both HTTP and HTTPS. They're all identical however provide different content based ...
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2answers
65 views

How to balance the root domain using NS records?

I have two load balancers that balance incoming traffic across multiple data centers. These work fine. I can test them out by doing an nslookup example.com xIP I have now taken out DNS services with ...
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1answer
32 views

Working WCF WebServices with NLB server

Im starting the architecture of a new project using WCF, but im not the right person to make some network considerations, so im doing some research but cannot find the answers to these questions: ...
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1answer
38 views

When load balancing, must all copies of static web page be exactly the same?

I am used to get answers for everything on the web, but not this time... Yesterday I enable Amazon DNS weight functionally to load balance 7 websites between two different IP addresses (split ...
2
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1answer
120 views

HAProxy error: Some configuration options require full privileges, so global.uid cannot be changed

After adding the line to /etc/haproxy/haproxy.cfg as part of creating a transparent proxy, source 0.0.0.0 usesrc clientip restarting haproxy starts giving an error ~# service haproxy reload ...
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1answer
84 views

Using 2 Transparent HAProxy for load balancing

We can configure HAProxy to be a transparent proxy by using the guide here, where one of the steps says ...to put the backend servers in a different subnet to the front end clients and make sure that ...
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0answers
180 views

RTMP Proxy Server

I have an application which uses both HTTP (content data) and RTMP (video streams) for communications. An nginx server is configured for load balancing and proxying incoming client requests. It works ...
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1answer
27 views

Apache loadbalancing - how to get reported about server fault

I am a newbie about load balancing so sorry if the question is trivial. I set up a basic load balancing using one server as a load balancer (planning to add at least one more with heartbeat) and for ...
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1answer
69 views

HAProxy - proxy to webserver via tcp

I have a simple web application, All requests to that application are HTTP based (RESTfull API and standard ajax) I have an haproxy before my tomcat cluster. So now i have clients that http request ...
2
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1answer
511 views

Dynamic HAProxy configuration

I try to figure out a way to dynamically manage the loadbalancer configuration. I want to add and remove "service nodes" depending on the overall system load. My research so far revealed "Thalassa" ...
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2answers
50 views

sending requests from many IP's [closed]

Is there a service I can use to balance requests between many IP addresses? I need to run some tests and want to send out http requests from a pool of say 100 IP addresses. I don't want to incur the ...
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66 views

Load Balancing Nginx

Okay I have edited my question :) I would like to point all traffic at my dedicated server running Nginx and have that handle 70-80% of the load while also distributing the traffic to some other VPS ...