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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NGINX: using multiple node as load balancer

I have application deployed on tomcat server on machine A,B,C,D I want to load balance using the Nginx using two load balancer nodes LB1 & LB2. All documents talks about using single node as ...
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Marathon containers load balanced with Haproxy and consul return random 503 requests

Currenty the architecture is organised like this: 192.168.1.10, 192.168.1.11, 192.168.1.12 - mesos master with marathon and consul server 192.168.1.21, 192.168.1.22, 192.168.1.23 - three mesos ...
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21 views

SSL Certificate on Load balancer or server

I have a load balancer distributing traffic between two servers, the public facing urls are all https prefixed. I want to generate a wildcard ssl certificate but I am not sure if is better to place ...
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1answer
22 views

AWS : IP filtering with Load Balancer

I have an Amazon EC2 Instance which I use to expose an API to my clients (Django and Nginx if that can help you). Now, I needed an SSL connection so I had to use a load balancer. I should mention ...
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how to resolve domain in frontend nginx load balancer for two backend apache servers [on hold]

how to resolve domain in frontend nginx load balancer for two backend apache servers...? we have confired nginx load balancer in frontend... and then configured two apache web-server in backend... ...
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2answers
50 views

How to replicate files between two separate apache machines in bidirectional

How to replicate /var/www/html/ between two separate machines which has separate hard disk storage running Apache web servers. I was planning to setup load balancing between these two Apache servers ...
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35 views

Keepalived - Keep VIP after stop in both nodes

There's any way to keep the last VIP configuration in the case of a daemon stop in all the nodes of Keepalived? Thanks in advance.
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Is it possible to use one WAN for upload only and one WAN for download only? [migrated]

I have a pretty poor DSL connection at my office, especially regarding upload. I was wondering if it exists some solutions to use a 4G WAN for upload only and my DSL for regular download. By doing ...
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2answers
46 views

Is HAProxy still necessary when Varnish can act as a load balancer?

I would like to load-balance my application servers, as well as cache the responses from them. I've read an article dating back to 2012 on HAProxy's website, that was supposed to clear the confusion ...
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33 views

HAProxy not recognizing host headers?

I have been trying to configure HAProxy to send traffic to different backend servers based on hostnames. I tried using the directions found in How to divert traffic based on hostname using HAProxy? ...
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HAProxy http_req_rate limit doesn't kick in

I'm trying to setup a rate limit on my HAProxy frontend, to prevent more than X requests to be sent to the backend in a specific time frame. As an example I want to limit to 1 request every 10 ...
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25 views

NGINX load balance via client subnet

I have 3 frontends with web application in different subnets. I want to use nginx as load balancer, but I want balance clients via client subnet. For example: frontend1 - 1.1.1.10 frontend2 - ...
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32 views

Load balancer F5 and sticky session

I have installed a web application on a clustered environment where the load is balanced by an F5 device. Unfortunately I do not know exactly its model, but hopefully this information is not necessary ...
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1answer
28 views

google load balancing external ip

I am trying to setup Google Compute Load Balancer to HTTP content route between my Google Compute Machines and my appEngine application, depending on the URL. I can get everything setup but it ...
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2answers
40 views

How to use multiple ip addresses on one subdomain?

I have multiple FTP servers, which users can connect and upload files. Because I always add more servers and sometimes the servers get full, I want to have a subdomain ftp.mysite.com, that will point ...
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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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2answers
63 views

Must I bind haproxy to port 22 to load balance ssh/sftp

I need to use haproxy to load-balance SFTP connections but currently i cannot bind it to port 22 (cutomer constraint). Can i bind to port xxx and listen on port 22 to achieve this or must I bind to ...
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32 views

Load balancing between two (or more) GRE tunnels

I have a hosted service (think zScaler™) that is having me send my traffic to it via GRE tunnels. I am given two appliances and want to load balance my traffic between the two tunnels. I could ...
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31 views

Using MX records for load balancing on *outgoing* email: bad practice?

I operate a Rails application (a Discourse forum) that needs to send out email. My sysadmin told me I shouldn't use a specific outgoing mailserver, but rather specify my domain and have my app lookup ...
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37 views

pfSense Load Balancing sticky connection timeout

In pfSense 2 under Settings > Advanced > Miscellaneous there is an option to enable sticky connections for the Load Balancing. If you enable the use of sticky connections you can define the source ...
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68 views

HTTPS streaming and dynamic load balancer using Wowza and AWS

We are using Wowza instances to perform live streaming on AWS infrastructure. We have a script that monitors load balancer and launches/kills instances when required based on the number of ...
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73 views

Gitlab Images not found with nginx proxy (load balancer)

I have the following nginx config: server { listen 80 default_server; listen [::]:80 default_server ipv6only=on; root /usr/share/nginx/html; index index.php index.html index.htm; ...
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107 views

How to Reduce Failover Interval in HAProxy?

I have setup HAProxy and it is working fine. I observed that when one of the node goes down HAProxy detects that immediately, but switch-over / redirect existing traffic to the rest of working nodes ...
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Cannot establish a connection to a virtual IP from the same host

I have a load balancer using LVS on my Ubuntu machine that has a virtual IP. Now I want to connect to this virtual IP from the same Ubuntu machine, but the connection establishment fails (the real ...
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1answer
29 views

How to Retain Proxy URL for all request using Apache load balancer

I am trying to serve the requests to my Site through Proxy machine using Load balancer. When i try to access the Site by hitting http://PROXYSERVER.com, the HomePage comes up fine retaining the ...
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internal error server point to working server using load balancer or nginx

Lets say that I have 3 physical servers with different IPs and 1 load balancer which manages the traffic between those 3 servers. We tested to stop the service of nginx in the 2 servers and the load ...
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mysql and webservers loadbalancing [duplicate]

I have 2 webservers and 3 mysql servers and 2 loadbalancing ip from ovh ، one for loadbalance webservers and other for mysql servers . how can I connect webservers and mysql servers together? what ...
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477 views

How to load balance sftp instances on AWS

I like to know is it possible to load balance sftp servers in AWS. I have 2 servers, and each of my servers are using s3fs-fuse to mount the same S3 bucket onto a mount point. Both of my ec2 ...
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161 views

For SSL bridging, do HTTPS backends verify that the load balancer is using the same private key? If so, how?

We are using the F5 to perform load balancing. When using SSL bridging instead of termination, we generally use a wildcard on the front-end and a regular SSL cert on the HTTPS backend. However, ...
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29 views

Neo4j HA scale out scenario

Is it possible or even feasible to start Neo4j HA with one master and add slave in high traffic time with some sort of load balancing? From Neo4j Doc : Neo4j HA requires a quorum in order to ...
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1answer
30 views

One big server or multiple small? [duplicate]

I run an ad network with about 10 million visits per month. It is very likely that this rate will increase to 50 million in the next 6 months. What is the best way wo scale hardware? Currently I am ...
2
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1answer
88 views

How to add Azure Internal load balancer (ILB) for an existing VMs

Hoping someone can point me to the right direction. I'm not having much luck with the setup. Here is the scenario and relevant (well, what I think is relevant but please ask if you need more) setup ...
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21 views

Load-balance via netfilter

In iptables I can mark some packets(one of four, ie) in preroute and redirect after only marked packets. Is way to load-balance traffic via netfilter tables?
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MX priority server behaviour

This is a question about MX procotol priority. If I have two server as MX with different priority: MX 10 serverA MX 20 serverB Is this guarantee by the protocol that the MX 10 is the prefered? Can ...
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2answers
25 views

Web server set up for load balancing and forwarding

We are working on a networked service, where all the functionality of our software is exposed via an in-house web-server. The company's clients connect to it via a browser, does their tasks, log out, ...
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1answer
32 views

Possible Operating System for Linux-experienced admins when configuring a MikroTik RouterBoard RB951Ui-2HnD as balance-loader

I have just bought a MikroTik RouterBoard RB951Ui-2HnD router and would like to try it as balance-loader, if that is possible. Until now I have just used some desktop computers with Zentyal running ...
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1answer
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Should a Load balancer be bypassed via server specific URLs?

We have a web farm with an F5 load balancer on Windows 2012 R2. Previously it was configured so that a single url redirected users to a specific machine in the load balanced farm. For example: ...
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Apache httpd, Tomcat : Load-balancing seems to work between two tomcat, but one stops and service dies

I am working on a task in which I have to load-balance two tomcat-instances such that they share a common session also amongst themselves and when one goes down, the other one can handle the task. ...
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1answer
54 views

Windows Server 2012 NIC Teaming vs. MPIO [duplicate]

I've got a server with Windows Server 2012 R2 installed on it. 1 NIC on the server is used for management purposes and I've teamed the 3 other NICs which communicate with our SAN to carry out VM ...
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1answer
62 views

Haproxy 1.5x reload configuration without terminating layer 7 sessions?

Folks, I moved one of our SaaS applications off a coyote point hardware load balancer onto a vm running nginx + haproxy with haproxy handling hash persistence. The problem I'm running into is the ...
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1answer
12 views

Understanding the concept of highload application

So, I have an idea of creating highload app using Ruby on rails. However there are some questions about the conception of the project. The main idea is Client->Load Balancer -> Server_1 ...
0
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1answer
27 views

Handle sessions with Amazon Elastic Load Balancer

I plan to have 2 t2.micro Linux instances with 1 MySQL DB db.t1.micro and 1 Elastic Load Balancer on Amazon Web Services. I will run PHP programs on it. My question is: Do I need to write session to ...
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3answers
50 views

Elastic load balance between different clouds

It it possible to have a load balancer on AWS distribute between an EC2 instance and an Azure virtual machine? I want to mirror my app between both cloud platforms such that the Azure virtual machine ...
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1answer
16 views

AWS Elastic Beanstalk Load balancer returning blak page after cloning EB enviromnent even if EC2 are runnig

Given I have healthy working production enviroment set up via AWS Elastic Beanstalk running 3 EC2 instances load balanced by ELB. (EC2 instances are Docker containers) When I clone the EB environment ...
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1answer
22 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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1answer
82 views

Using uWSGI's built-in load balancer vs nginx

I have a python app that is exposed through wsgi and was going to deploy it to the world. There are no static assets that are served from it. The app will be deployed to a single machine. I am ...
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65 views

best practices for load balancing node.js app on google cloud

I'm looking for some feedback on deploying Node.js apps in Google Cloud Compute. We're currently using Google's HTTP Load Balancer and having it funnel traffic directly to our pool of Node.js ...
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How to diagnose load balancer fault

I have an apache2 load balancer connected to two servers. Over the past month I have noticed that the load balancer gives preference to one server over the over even though there is no balance ...
2
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1answer
18 views

Windows Network Load Balancing Manger & IIS original source IP?

I have Microsoft NLB on front of three IIS-servers. Which are configured on the same cluster. NLB itself is doing fine, but on IIS-logs all the requests are coming from the NLB:s IP-Address. Is there ...
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1answer
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Our app lags “randomly” due to Disk I/O issues?

We have made an app that requires hundreds of images downloaded for each user every day. Our basic server setup is as follows: Loadbalancer -> Nginx -> Databaseserver However, our app "randomly" ...