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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squid3 FAIL with cache_peer round-robin on 127.0.0.1 different port

I have 3 tunnels end to a Debian running squid3 (ports 9001 to 9003). At start of each tunnel runs a proxy. I try to load-balance those proxies this way: http_access allow all http_port 4128 ...
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59 views

Nginx Load Balancer having two load balanced nginx+php-fpm (Primary script unknown) error

We have two web servers with nginx+php-fpm ( 10.0.0.10 and 10.0.0.20 ), which is load balanced behind another nginx server ( just nginx ), when we try to browse we get file not found error, with error ...
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28 views

Apache Load Balancing And Network traffic Flow

I am using apache load balancing to load balance web requests to various other nodes, the problem I am having is during uploads and downloads, all the traffic is also being routed through my load ...
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2answers
55 views

Haproxy: How to balance traffic within directory reached?

I want to know if there's a way to balance the traffic within directories using haproxy. I have haproxy balancing all HTTP traffic to server1 & server2. What I want is to balance all images ...
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1answer
66 views

Permit access to website with load balancer (changing IP), disable rest with iptables

I need to block access to all websites except for a couple of URLs on a group of workstations. Apparently a few of these websites are load balanced. I use iptables: iptables -P OUTPUT ACCEPT ...
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1answer
67 views

ipt_CLUSTERIP: unknown protocol 1

I am trying to create a web cluster with two load balancers and a single public ip address The command I use is the following: iptables -I INPUT -d $CLUSTERIP -i $WAN_IF -j CLUSTERIP --new ...
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2answers
273 views

Squid load balancing and reverse proxy conflicts

I'm having difficulties configuring Squid 3.3 to do both "load-balancing" over multiple WAN links (using random ACLs + tcp_outgoing_address options) and to also have a "reverse proxy". It works just ...
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122 views

LVS + keepalived for load balancing transparent SQUID proxies

I need to load balance a number of SQUID proxies configured in transparent mode. Below is a simple diagram with one LB and SQUID boxes. ---------- | Client | ...
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1answer
155 views

Nginx add a response header that describe the upstream server used

I'm starting to use nginx with multiple backends by using the upstream directive. I want nginx to add a response header that describe which backend server was used to serve this request. Something ...
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1answer
32 views

Three ADSLs on a single router [duplicate]

I know that my question sounds impossible, but I would go deeper into it. I have three Internet connections: ADSL from Provider 1; ADSL from Provider 2; LTE from Provider 3 (USB WiFi Box). I need ...
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1answer
267 views

How to make connections answer from the same gateway they entered in RouterOS?

I have a MikroTik RouterOS 6.23 device, and my network is as follows: Router | |-- bridge1_LAN (wlan1 + ether1) (192.168.0.210) -- LAN (192.168.0.0/24) | Here is where computers are. Those ...
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116 views

Clustering with Jboss EAP and Load balancing with Haproxy

I'm doing load balancing with HAProxy and use JBoss EAP as application servers. The Haproxy server is configured to route incoming requests to the application servers. How can I integrate Jboss EAP ...
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69 views

Direct server return loadbalancer for mariadb galera cluster with 2 networks

Is it possible to configure LVS (keepalived) loadbalancer with direct server return (DSR) for 2 leg network setup? The desired architecture is as follows: mariadb galera cluster, where each node has ...
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1answer
104 views

Default backend in haproxy

I wonder whether there is a way to configure a default backend in haproxy, so it balances requests among a pool of backend servers (three in the example below), keeping the default backend as a ...
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2k views

How is a single IP address load balanced?

I'm aware of "round robin DNS" load balancing, but how can a single IP address be load balanced? Google's DNS servers for example, 8.8.8.8 and 8.8.4.4. Wikipedia's load balancing article states: ...
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142 views

How to AVOID getting caught in a DDOS meant for someone else (not prevent)?

So we have a load balancer and all that jazz set up with Rackspace. However, guess what, our clients' websites were down again today. It seems that Rackspace should have their load-balancer ...
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1answer
126 views

EC2 Failing Load Balancer Health Check

One of my projects is an internal web app which we are putting behind a load balancer. As of now there is only one ec2 (will be more in production) and the load balancer is not able to reach the ...
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57 views

how to prevent loadbalancer from going offline?

i plan to setup a load balancer for a webproject but there is a major issue in my head: a typical loadbalancer would be: (provided by nginx upstream) Server #1 accepts all requests and forwards them ...
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2answers
162 views

Geographic load balancing

At a company they currently have a typical webserver setup: one webserver and one database server. Unfortunately there are often problems due to high load on the webserver and database so I was asked ...
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14 views

Simple way to test my load balancer from behind (inside) its LAN

I have a 3 DSL load balancer with, say, 1MB/seg download speed. In order to check its correct behavior from any of the computers connected to this load balancer and see if traffic (download, at least) ...
2
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1answer
335 views

How would you set up multiple SSL terminating Haproxy instances, which are themselves load balanced?

I've been doing a great deal of research and experimentation on this, and I'm really running into a wall: I'm trying to set up HAProxy as the reverse proxy for a high-availability environment. All ...
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1answer
37 views

What is the request flow in BIG-IP load balancers for NONE preference?

I would like to know to which member does the request will be first directed to when NONE preference is set in the BIG-IP load balancers. From this link, there are three ways to set the redundancy ...
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341 views

Load balancing iptables

I am trying to use iptable for load balancing. I'm working with virtualbox. All vm (debian)are in internal networking and IPs are static. I want to route requests coming to my web server(apache2) with ...
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1answer
53 views

Azure Traffic Manager TTL - what does it mean for downtime

The default TTL on Azure Traffic Manager is 5 minutes by default. Does this mean that when a server (endpoint) goes down then people won't get routed to a working server for up to 5 mins?
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262 views

Load balancing network traffic using iptables

I am trying to load balance traffic from internal LAN on a linux router having two gateways. Initially I went for the iproute implementation which didnt balance the load as expected, reason being that ...
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31 views

Load Balanced Apache [closed]

I am currently working on a POC solution where I would use a software load balancer to ensure HA for two Apache servers. Please pardon any mistakes because this is the first time I am playing around ...
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1answer
862 views

I can't upload server certificate on AWS IAM

I got AWS iam working on my server, and trying to upload some certificates: aws iam upload-server-certificate --server-certificate-name domain2014 --certificate-body ...
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2answers
601 views

RapidSSL: domain name does not match the certificate common name or SAN

I'm installing SSL certifcate (RapidSSL) on Amazon AWS (Load balancer). Installation was already completed, but when I test it I get: Wrong certificate installed. The domain name does not match the ...
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1answer
245 views

Apache presents wrong certificate when accessed via load balancer [duplicate]

I've got a server that has two SSL certificates set up, one for internal access where it is accessed along the lines of host.my-local.net and other for external access where it is accessed similar to ...
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2answers
327 views

Load balancing IPTABLES POSTROUTING rules

I have an interface with 5 IP addresses assigned to it (as virtual adapters) let's call them x1,x2,x3,x4 and x5. Currently I have SNAT POSTROUTING forwarding rules from local source range to specific ...
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1answer
326 views

NGINX ip_hash load balancing not working

I've set up NGINX to load-balance requests to my web app. One front end server passes requests to two backend servers. All works fine. However, I have been using the ip_hash directive to ensure users ...
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1answer
224 views

Clustered Apache 2.4 LoadBalancer displays no content on /balancer-manager

I have a Clustered Loadbalancer (pacemaker, corosync, apache 2.4) on CentOS 7. There are two configuration files, one for the actual balanced site and one for the balancer-manager. When I access the ...
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61 views

NGINX: Disk write spike and/or not enough workers error from sudden surge in traffic causing 500 errors

I have been trying to diagnose an issue we have on our production servers. We have a server running NGINX as a load balancer which splits requests between four application servers. At least a few ...
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1answer
100 views

Apache 2.2.4 Proxy Balancer Extremely Slow When a Balancemember is down

I am using apache 2.2.4 as a reverse proxy server in my DMZ. The Proxy Balancer appears to work great when the two BalancerMember servers are up. But if I shut one down, It takes roughly 30-45 seconds ...
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0answers
173 views

WordPress behind haproxy: $_POST being reset

So here's the sitch: Load balancer (haproxy) delivering to 3 web servers and a database server, 5 servers in total with memcache sessions being shared between the web servers. I can confirm that ...
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1answer
121 views

TCP Load balancing

I need to implement an architecture that can serve 3 million GPS Devices sending Location Updates/Alerts (every 10 secs) to our system for processing. Features: 1) TCP communication. 1) Long lived ...
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55 views

Bottle neck of nginx?

I'm using nginx as a load balancer on amazon ec2 m3.large instance. This load balancer will receive loads from a load generator and distributed them to the 3 instance with mysql database serves as ...
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1answer
204 views

apache proxypassreverse ServerName not working

I have a secondary development wordpress site. (Centos 6.6 x86 ,LAMP) Since the size of the site is growing. (300GB+). Now I divide it into 3 server. domain: www.example.com server1 46.192.22.01 ...
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1answer
123 views

Howto configure apache httpd load balancing with workers that only differ in path, not host?

How can load balancing in apache httpd be configured if the workers only differ in path, not host? E.g. I have the public URL http://www.example.com/myapp and this should be load balanced to internal ...
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1answer
36 views

Riak setup and LB?

Quick question about setting up riak cluster. Do I need load balancer in front of the cluster ? The cluster will have 3 nodes with N =3, so successful write must have the data in 3 nodes. Any ...
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1answer
70 views

High Load Website. how to load balancing? [closed]

i have the following problem: i have two servers (intel xeon 3,4 GHZ with 32GB RAM and RAID 10 (4x1TB Enterprise Harddiscs). all servers are installed with vmware esxi 5.5 (free). webserver, ...
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1answer
139 views

Nginx Load Balancer Optimum Specs

I have 3 Nginx servers and each of them should handle about 2k users (concurrent connections). In front of them I have Nginx load balancer. That's 4 Virtual machines, sharing same subnet and same ...
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40 views

HAProxy backend throttling

I'd like to use a similar setting with the one described here to rotate among a set of proxies (not Tor but same idea). One extra requirement though is to throttle requests so that no backend server ...
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1answer
212 views

Why layer 7 load balancer cannot pass through SSL termination?

I need to share ssl termination task among server farm or multiple processes. In this architecture, there should be a load balancer before this ssl termination task. After looking for an appropriate ...
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1answer
99 views

Architecting nginx for redundacy

This may be a stupid question, but after googling a while I can't find the answer or just don't know how to ask it. I have a web app running on a server named 'myserver1'. I've brought up 'myserver2' ...
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2answers
357 views

Scale HAProxy for more than 64k websockets

We are trying to design an architecture that will be able to handle more than 64k websockets. We first tried with Amazon ELB, but its design doesn't allow unexpected spike of traffic nor websocket. ...
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1answer
46 views

How to achieve stateful fail over when using multiple uplinks?

I have multiple ISP lines over which I am load balancing the network traffic on my linux machine having multiple interfaces ( eth0, eth1 ,eth2, eth3) . This I am doing by creating the routing tables ...
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25 views

Fail over in Lokiwall Firewall

I have configured lokiwall firewall on my linux machine having multiple interfaces. Dual Routing works fine. However, I wanted to know how does the fail over happen in case a link goes down. Do the ...
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33 views

Permanent redirect from machine behind load-balancer

I suppose you've seen questions about Google indexing both the domain name and IP address of a site. I have a similar problem, except there's a load-balancer in between, and I have no access to this ...
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1answer
171 views

F5 BigIP limiting the amount of sources able to connect to a virtual server

In an F5 bigIP LTM with sw version 11.4.1, is it possible to have multiple sources addresses for a virtual server? The objective is to limit the number of sources from where the virtual server can be ...