Questions tagged [load-balancing]

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CPU load and CPU usage impact on processes

I have looked into a fair bit of online forums and blogs to understand the impact of CPU load and CPU usage on processes. By CPU Load I mean the Load average which appears in top command. 1min, 5min, ...
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How to NGINX reverse proxy to backend server which has a self signed certificate?

I have a small network with a webserver and an OpenVPN Access Server (with own webinterface). I have only 1 public ip and want to be able to point subdomains to websites on the webserver (e.g. ...
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10 views

HAProxy configuration problem with ports

Hi :) I have problem with HAProxy configuration. I have haproxy and two backend servers (backend servers listen on 1234 port) It's my haproxu config: frontend http_front bind *:80 backend ...
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1answer
62 views

L4 balancing using ipvs: drop RST packets - failover

I have a L4 ipvs load balancer with L7 envoy balancers setup. Let's say one of my L4 balancers goes down and thanks to consistent hashing the traffic which is now handled (thanks to BGP) by another L4 ...
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20 views

Load balancing packets from interface to many virtual interfaces

I've got a server with interface eth0. I'm using a black-box software (SNORT) that gets as input an interface and using a single thread analyze the packets' data. I wish to increase the throughput ...
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10 views

Apache LoadBalancer not distributing evenly

I have an Apache 2.2 LB which I am trying to understand why all traffic is going to IP 137 mainly. I thought it was because maybe restart time, as up time was lower than others, so I did a reset on ...
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1answer
15 views

HTTPD load balancer shows duplicated information about nodes

I have enabled the HTTPD LoadBalancer Manager as: <location "/balancer-manager"> SetHandler balancer-manager allow from all </location> But when I access the HTTP ...
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29 views

NAT: accept a connection and then forward it?

In linux (or BSD), is it possible to accept an incoming connection, read the first payload packet, and then forward the connection to another server based on the contents of that packet? I'm not blind ...
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16 views

Two Virtaulhost with one IP in Apache2 is not working with Haproxy

For my case, haproxy is at front-end where ssl terminates ( in actual system) and requests are served via back end. In backend, there are two virtual hosts. My requirement is that if client type IP in ...
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24 views

haproxy setup is not working when resource utilization become high

We are using HA proxy v2.3 in our organization for load balancing our apache application servers. Three web application servers are configured in haproxy. When any one of the web application server ...
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134 views

Trying to pscp a pem file from windows machine to Brocade adx 1000

Brand new to Brocade or any switch, I managed to configure load balancing without ssl and now working on ssl enabling. I have a PEM file on my IIS server and I try to copy this to the switch using ...
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1answer
92 views

HAProxy ignores nbproc

In our test environment we've identified a strange HAProxy behavior. We're using the standard RHEL 7 provided haproxy-1.5.18-8.el7.x86_64 RPM. According to our understanding, the total number of ...
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758 views

nginx load balancer and kafka rest proxy

I use Kafka rest proxy and I want behind load balancer nginx. I have one topic in cluster Kafka(three nodes) and Produce a message with JSON data curl -X POST -H "Content-Type: application/vnd.kafka....
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1answer
488 views

Apache load balancer always redirect

I set the LoadBalancer in Apache 2.4.6 (CentOS), it works well except one thing. When the user open the alias of Apache server, it anytime redirect the user to another server when click somewhere on ...
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1answer
57 views

Detect bot on AWS

We use angular for our front end, our compiled dist folder is uploaded to an S3 bucket which is connected to a load balancer. In order for our site to be rendered correctly for search engine bots we ...
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116 views

Accessing a Kubernetes service using nodePort from external load balancer

When I expose the kubernetes service using nodePort , then I can access the port/service using any workder node IP:PORT , even if the service is just actually running on just one node. What would be ...
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333 views

NGINX -> varnish load balancer -> Apache SSL connection = BAD REQUEST

This is my setup : Server 1 = Nginx is receiving the request on port 443 and is used as a reverse proxy to send it to Varnish 5, on the same server on port 80. Varnish is load balancing requests on ...
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2answers
755 views

nginx load balancing doesn't work [closed]

I have experience the problem in nginx load balancing configuration. the load balancing server doesn't want to forward into any backend server. I set the server configuration as below: Hostname ...
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1answer
1k views

Do multiple entries for nslookup imply load-balancer via DNS?

I'm reading about the differences between a load-balancer implemented at the DNS level vs having a single DNS entry which forwards to a load-balancer. I found this Q&A particularly useful: I'm ...
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1answer
1k views

distribute the JVM across a cluster of machines

Grasping at straws for search parameters and terminology. The key attribute to the JVM is the V for virtual (at least within the context of this question). How do you span a JVM across a cluster of ...
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1answer
322 views

CARP Interface Doesn't Respond to Traffic

I have two OpenBSD boxes on running as Gen1 VMs on Hyper-V 2016; the VMs are split across two Hyper-V hosts. The NICs associated with the CARP pseudo interface do have MAC address spoofing enabled; ...
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207 views

Download Booster: combine ethernet and WiFi bandwidth (load-balancing internet connections)

I'd like to know and how I can use simultaneously two (or more) internet connections, i.e. Ethernet, WiFi, but also 3G/LTE, ... For example, I would use Ethernet from my ADSL router and WiFi from an ...
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2answers
615 views

NGINX LoadBalancer not working, only pulling up default index.html site on LB, not upsteam servers

I setup an NGINX loadbalancer in front of 2 tomcat servers on a Cent7 system. When I try to pull them up from the LB, I just get the default index.html NGINX page from the default installation. I've ...
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1answer
91 views

nginx tcp balancer + exchange

My Nginx works like tcp balancer between users and Exchange cluster. Every thing works fine, but I'd like to add active checks. For example IMAP service, after TCP session initiation service return ...
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0answers
647 views

FreeBSD load balancer implementation

I have a program, which cannot be used in multiprocess\multithread mode, so it eat one CPU core, others cores are free, but RAM and network bandwidth usage near to 10% from max. The server for the ...
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62 views

How to add ngnix behind haproxy server

I have setup nginx web server and I want to do the load balancing using haproxy server. I have done these using apache but unable to do it for nginx. Below the apache settings which are working for ...
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932 views

can i configure an apache VirtualHost Proxy BalancerMember as failover-only (e.g. hot/warm)?

i currently have a VirtualHost configured to load balance between 2 servers. however, to avoid race conditions that occur when both instances are active, i would like to switch to a hot/warm ...
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648 views

10GBit Ethernet network mesh switch with brouting and “VLAN”

I want to create a mesh network with 10GBit Ethernet links between servers and a switch stack capable of distributed trunking. In this scenario for a number n>2 (but typically 2<n<6) imagine:...
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1answer
2k views

Reverse SSH Tunnel

I have a gitlab server on my local network and a server that I can ssh to from outside my network. Is there a way I can configure the server, that I can SSH into, so that when I use: ssh git@git....
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1answer
318 views

Memcached Issue connection lost in between Centos

I have a application server on with I m running load balance with nginx.. my memcached is getting crashed in between. below is my memcache.conf file. # memcached.conf port=11211 pidpath=/apps/home/...
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1answer
673 views

Using a load balancer instead of Apache to throttle transactions from specific IP's

I have two Apache instances behind a load balancer that I transfer the requests to, depending on the request type. Now what I want: when I get too many transactions from an IP address, I want to ...
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2answers
745 views

Why does my cpu never get past 60-70% cpu usage? Where is the bottleneck?

In my CPU graph thingy, I have noticed recently that when compiling stuff I can never seem to reach 100% usage, it just keeps bobbing up and down around 60-70% max. Example: In contrast, this graph ...
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455 views

How to make load balancing work from the pfSense box itself?

pdSense is a special distro of FreeBSD for routing. It supports limited multi WAN load balancing, i.e. it is possible to configure pfSense so that each next request will connect via different WAN ...
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207 views

How to route to Virtual IP as gateway

I have environment on Centos 6.7 Final, 2 Loadbalancer failover (Haproxy, keepalived), 3 Web Server (nginx - PHP-Fpm). LB1 (Public x.x.x.233, Private 10.110.120.21), LB2 (Public x.x.x.235, Private 10....
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2k views

Apache Load Balancer Timeout

We have two httpd servers running on RHEL 6 behind a hardware load balancer We are getting timeout errors in our httpd error log. [Fri Feb 19 15:06:49.823372 2016] [proxy_http:error] [pid 15760] (...
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1answer
859 views

HTTP Session Management while using Nginx as in “Round Robin” mode Load-balancer?

I'm trying to load-balance "2 Web Servers (running Apache/PHP)" by putting nginx in front of them. But I need to use Round Robin algorithm but when I do this, I can't manage to have the stable ...
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1answer
4k views

Understanding retry value in Apache Load Balancer Configuration

We are using mod_proxy to balance load between our backend servers . We have different setup and some of the backend servers either runs on tomcat\jboss. The balancer configuation is as follows ...
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1answer
628 views

Running crons on a scaled mirrored servers (cron logic needed) [closed]

I have a client running on Rackspace, they have three servers that are synced together entirely, I've added a bunch of crons in the crontab using wget to the web address of the cron (that sync to each ...
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1answer
436 views

How to load balance mutiport traffic using HAProxy

I have 2 servers that host an application that listens to mutiple ports. Is there a way to load traffic between these servers using HAProxy? I tried this in configuration, but it didn't work: ...
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107 views

How to Limit the hit-rate of connection for “X-Forwarded-for” IPs?

I have Apache, which is behind the Amazon ELB which forwards the IPs as in "X-Forwarded-for" header. I found some articles around to do the hitrate limitation but i doubt they are all for real IPs, ...
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1answer
147 views

Apache loadbalancer not serving requests intelligently

My Apache LB is serving requests to a failed node as well. Am I missing something? worker.list=node1,node3,loadbalancer worker.node1.port=8009 worker.node1.host=10.0.0.17 worker.node1.type=ajp13 ...
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1k views

OpenVPN load balancing

The question is in general about the best practices. VPN network has to manage about a thousand of simultaneous connections, so there is a problem in load balancing over several OpenVPN servers. ...
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3answers
918 views

KeepAliveD Documentation

I am looking for a consolidated documentation for KeepAlieD. My apologies if this is not the right place to ask this question. However, even after extensive googling for 2 days, i could not find a ...
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1answer
528 views

load balancing multiplie services linux

I have setup multiple servers, One of them is a windows server running team speak. The other is a game server with csgo(counter strike global offensive) and lastly, one running an apache server. ...
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1answer
2k views

keepalived virtual_server - only answering on box keepalived is on

I have a flat network (no routing yet) of 3 servers, each with a service (http, mysqld, doesn't matter) listening on 0.0.0.0 (ip_nonlocal_bind and ip_forward are on) and running keepalived. ...
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2answers
7k views

Multiple IP source on single interface in Linux

We could set multiple IP addressses on single interface, for example using NetworkManager: How to make any connection to outside of this PC to use different IP? for example if I have 8 IP addresses (...
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1answer
1k views

setting (system-wide) CPU affinities for running processes on a Linux platform

I am conducting a kind of research in that I schedule multiple parallel applications (e.g., OpenMP/pthreaded applications) and execute the applications on specific (partitioned) cores on Linux-based ...
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1answer
285 views

How nginx receives requests from client and forwards it to the actual server?

I have installed nginx on RHEL and now I need to configure it to forward the requests to the actual server in the /etc/nginx/nginx.conf. My actual server is using a private IP address, will nginx ...
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58 views

Same website, multiple servers

I have a single server with a folder that contains my website with Apache, with a database in MySQL that contains some of my website data. Now my question is, say that millions of users are using my ...
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33 views

SSL (Hosted on LB) to be installed on the Downstream Apache Servers?

First, I have very basic knowledge on the SSL topic. Here is my setup. I have (1) of Public Facing Domain on LB and (2) of Internal Domains on each Web Servers. Like: [https://public....