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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AWS Elastic Load Balancing to 2 Nginx web servers Not Working
On AWS, I have two Nginx web servers serving up a WordPress site. The two web servers are connect to and NFS server. All servers are working great, online, and healthy.
I setup AWS Load Balancing ...
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0answers
31 views
nginx wrong IP when checking connections limit
I have lot of times the following line appearing in the nginx error log. This is causing the 50x error appearing to the visitors of the site. We have a multilanguage site that has URL ...
2
votes
3answers
49 views
One Alias to point to multiple IP addresses
The problem I have is the following:
I have distributed application (3 geographically spreader nodes), which on request returns large data sets. In order to reduce the network traffic, I need to ...
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1answer
28 views
Private ip iptables rule
I am using Windows Azure where they allocate a private IP for you like 10.3.2.1. If I have another machine at 10.3.2.2, how can I open up the first machine(say port 3306) to let the second machine to ...
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7 views
One packet scheduling in LVS and source address of outgoing packets
I am using LVS (ipvsadm) in NAT mode to load balance UDP traffic for a number of "realservers". I am using one-packet-scheduling so that traffic originating from a single source port on the client is ...
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0answers
23 views
Apache as Load balancer - forcing a break in persistent connection
I have setup a load balancer with Apache 2.2 via mod_proxy and mod_proxy_balancer. The load balancing works just fine, but there is one case I cannot find any configuration options for, namely, while ...
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1answer
57 views
Any auto-scaling ELB alternatives for EC2? [closed]
I have a python web application running with nginx and uwsgi on amazon EC2. I would like to implement a system where in instances are spawned or deleted according to the load. And a load balancer that ...
1
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2answers
34 views
Certificates for clusters
I have read the various threads regarding clusters (behind the load balancer) and certificates.
I am trying to implement this in our company.
Firstly Our compnay policy is not to allow exporting of ...
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votes
1answer
32 views
HAProxy loadbalanced backend - behaviour when one server down
My understanding was that with two server backends load-balanced by HAProxy , if one goes down, HAProxy should be able to direct all traffic to the other.
I have two loadbalaced webservers, with ...
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2answers
31 views
Using dual isp and static ip [closed]
what are the options to increase/backup bandwidth of a load balanced web farm gaining bandwidth from more isps?
What are hardware/ip requirement to benefict from the 2 lines?
...
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0answers
38 views
Need to set up a shared file system for load-balanced site in Amazon AWS
I have two load-balanced nodes and rather than synchronizing two file systems, I would like to try a shared file system. What is the best way to do this in AWS? I am using Windows Server 2003 for the ...
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votes
1answer
27 views
Syslog-ng Load Balancing
I am working on setting up a syslog-ng server to accept logs from various sources. The general setup is going to be:
Device1
Device2 Syslog1
Device3 --> Load ...
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0answers
24 views
tomcat 6 horizontal clustering?
Please see my previous question.I didn't get any answer and the answer was not helped.That's why I created a new ...
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1answer
41 views
Adding load balancing completely slowed down my server
I have decided to scale a service and added load balancing using NGINX upstream.
My Setup
upstream main {
server example1.com:8909 weight=1;
server example2.com:8909 weight=1;
...
}
server {
...
0
votes
1answer
26 views
How to make Nginx forward the original host name
I have an nginx server acting as a load balancer for my apache servers. I am using subdomains and my code relies on the HTTP_HOST value to perform the correct task.
When i make a request to say: ...
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0answers
14 views
load balancing or route par app on OSX
I'm searching if there is a software's solution on OSX to use 2 different routes (10.0.0.1 & 10.0.0.101 ) with a load balancing effect or specify a route for each application.
For example : ...
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votes
1answer
41 views
NGINX as Load Balancer to IIS web servers
I am trying to set up a simple software load balancer based on NGINX for two IIS web servers.
Here is the NGINX configuration file I have created for the load balancing:
http {
include ...
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0answers
50 views
Confusion setting up a simple tomcat6 clustering on ubuntu 12.04 using mod_jk: status page won't show
am a little confused when setting up 2 tomcat6 instances cluster in a clean ubuntu server 12.04. i didn't install default tomcat6 i used tomcat6-user's tomcat6-instance-create to create 2 instances. ...
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0answers
13 views
Is it possible to catch requests on barracuda load balancer?
I need to take different measures on barracuda load balancer and to trigger some actions.
For example, if the response time of 95% requests exceeds 3 seconds then an action should be taken. How can ...
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vote
3answers
70 views
reverse proxy and load balance server architecture
While creating a load balanced and reverse proxy based architecture, how would the two be placed?
Is this the correct architecture?
First LB server, then proxy: - When client hits a URL, it is ...
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0answers
32 views
What is a logical web address, when using a loadbalancer for distributing load among clustered web applications?
In Oracle docs, I keep coming across the term 'Logical web address (LWA)', and this concept is especially useful while setting up a load balanced application.
I couldn't find any documentation on ...
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0answers
10 views
ldirectord does not transfer connections when a real server dies
I am using ldirectord to load balance two IIS servers. The ldirectord.cg looks like this:
autoreload = yes
quiescent = yes
checkinterval = 1
negotiatetimeout = 2
emailalertfreq = 60
emailalert = ...
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0answers
18 views
Co-current connections supported by EC2 [duplicate]
How may concurrent connections Apache can handle on Amazon EC2 small instance?
I will have to test the site for the sake of load balancing.
1
vote
1answer
62 views
Per-packet round-robin load balancing for UDP
I need to load-balance UDP traffic between a number of "realservers" and do it in a truly round-robin fashion. I've started with keepalived, but unexpectedly discovered, that LVS treats UDP traffic as ...
0
votes
1answer
93 views
Load balance https and websockets wth sticky sessions and NGINX
I'm using NGINX to do sticky session load balancing in front of a node.js app that will support http, ssl, and websockets. If I want the load balancer to simply forward requests to the node.js server ...
0
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1answer
32 views
Misunderstanding about packet travel over NLB-Network
I'm doing a LAB about NLB(Network load balancing) on Windows Server 2008 - Unicast mode.
But I can't understand how the packet travel across the Network...
...
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2answers
62 views
rewrite http to https with ngnix behind load balancer
I'm using a Rackspace load balancer which enables me to set up my ssl key/pem inside of the admin panel. Everything works fine, I can use both http and https protocols. But if I try to redirect http ...
0
votes
1answer
36 views
HAProxy load balancing based on source ip (IP subnet)
I have x cluster. This cluster look like
Cluster 1
192.168.1. (Server type 1)
192.168.2. (Server type 2)
192.168.3.1 (Server type 3) <Redis server>
Cluster 2
192.167.1. (Server type 1)
...
1
vote
1answer
41 views
Can I use an Amazon Load Balancer in front of multiple GlusterFS EC2 instances?
I'm encountering an interesting problem with setting up a High-Availability file system cluster on EC2. The idea behind the setup is simple: 2 GlusterFS nodes are in two separate availability zones ...
0
votes
1answer
32 views
IP-based load balancing on external and internal interface
I have a certain distributed (as in, multiple components on multiple machines) service, that should be made available from the outside world. So, in LVS terminology, the clients are "on the internet", ...
-2
votes
0answers
23 views
Should I host sharing buttons on a seperate domain? [closed]
I want to offer a set of social media sharing buttons[1] that lets users send a link to a website.
Users can embed them in their website and I'm worried about the traffic and server workload. Should ...
1
vote
1answer
40 views
Round-robin mail forwarding in Exchange 2010
We are using Exchange 2010 to receive B2B messages as mails. To balance the increasing number of incoming mails to multiple parallel application servers, I am looking for a way to forward the mails in ...
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0answers
27 views
Should ICMP redirects be turned off on servers running LVS+keepalived?
Suppose I have two servers running LVS and keepalived. I read in RFC5798 that ICMP redirects can work together with VRRP, but some articles on the Internet suggest that we should turn off the sending ...
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0answers
20 views
Apache2: benchmarking kills the server? How to limit number of concurrent requests served by apache2
Running this command chokes apache2 for some reason?
The command is:
ab -n 1000 -c 100 http://example.com/
So if a large number of concurrent users kills the server, how do you make it so that the ...
0
votes
2answers
67 views
What is the advantage of having ELB infront of your NGINX servers?
I've looked into a lot of back end setups on Amazon Web Services, especially that of Instagram's. On their Instgram Engineering Blog they mentioned how they have an Elastic Load Balancer in front of ...
0
votes
1answer
61 views
AWS VPC ELB vs. Custom Load Balancing
So I'm wondering if this is a good idea. I have a Amazon AWS VPC setup with a public and private subnets. So I all ready get the Internet Gateway and NAT. I was going to setup all my web servers ...
0
votes
1answer
47 views
Does LVS ldirectord Load Balancer support SSL termination / offloading?
I use a ldirectord setup for load balancing a couple of real servers and for the HTTPS conenctions I am considering using some offloading mechanism on the LB - is there some functionality already ...
0
votes
2answers
31 views
Updating db server with no internet connection
I have a database server running Ubuntu 12.04. The db server is connected to a load-balancer(HAProxy) on a LAN network and the LB is connected to the internet. So the db server has no direct ...
0
votes
1answer
18 views
How can I passthough the client-requested host when using NGINX as a loadbalancer?
I have an NGINX config:
upstream djangobackend {
server svr1.int.example.com:80;
server svr2.int.example.com:80;
server svr3.int.example.com:80;
}
server {
location / {
proxy_pass ...
0
votes
1answer
37 views
Connecting HAproxy load-balancer to WAN and LAN
I'm setting up a load balancer with failover and I'm confused on how to properly set it up. The load-balancer is balancing web traffic to web-servers on a LAN network.
My setup is the following:
I ...
0
votes
2answers
47 views
Juniper Router - Load Balancing
I have a single Juniper router which is connected to multiple external ASs. I am looking to load balancing for best way to automatically move traffic away from one link the others (without hardcoded ...
0
votes
1answer
86 views
NGINX as load balancer with tomcat6 gives bad gateway error only only HTTPS mode
I am using nginx as load balancer on tomcat6 webserver. Both NGINX and TOMCAT6 have been configured to use only HTTPS. NGINX configuration settings are mentioned in the following two files.
...
1
vote
1answer
74 views
URL rewriting between different pools with different authentication in IIS
I have an IIS application and three sub-applications as follows:
CMT (Windows and Anonymously authenticated)
- CI
- EM
- Website (Windows authenticated)
CI and EM are helper web services and ...
0
votes
0answers
33 views
HAProxy Frontend and Backends on Same Network
Is it mandatory to have the HAProxy Frontend and Backends on different subnets ? Can I run HAProxy in a configuration where the backends are also on the same subnet as the frontend(s) ? If its ...
1
vote
1answer
771 views
How to horizontally scale SSL termination behind HAProxy load balancing?
I've been looking around and no one seems to be trying to scale SSL termination the way I am and I'm curious as to why my approach seems so uncommon.
Here's what I want to do followed by why:
...
2
votes
1answer
43 views
Load balancer apache what's wrong
I' trying to make a load balancing using apache but when I got to my (Local)host 'load'
got Not found
I've been load those mods
LoadModule proxy_module modules/mod_proxy.so
LoadModule ...
5
votes
3answers
145 views
Load balancers and SQL backups
Our production environments typically consists in 4-8 Apache web servers and 2 (My)SQL servers :
Each web server is affiliated to one SQL server
SQL servers have a circular replication setup
All web ...
0
votes
1answer
35 views
Amazon Web Service monitoring
I have deployed a web app on an AWS server. I have following questions:
Monitoring
my websphere app server status capacity monitoring?
uptime thru Amazon CloudWatch metrics?
Load balancing
...
0
votes
1answer
34 views
lighttpd server-status blank host and uri
Looking at the server-status on lighttpd, running behind a AWS load balancer, I'm seeing some long-lived (up to around 60 seconds) requests, in a "read" state with a blank host and blank URI. What ...
0
votes
2answers
62 views
Link aggregation on ESXi: can one TCP/IP stream in a guest VM use more than one link's banwidth?
I have VMWare ESXi 5.1 host with several gigabit links, connected to a LACP and 802.3ad-capable switch, in a static LACP mode on a switch, with "IP hash" load balancing mode in ESXi. I'm currently ...
