1
vote
1answer
201 views

Any problems with having an active/active HAProxy setup with Keepalived

Apologies if this has been asked before, but I can't seem to find much on it. We're going to be using HAProxy to load balance our MariaDB Galera Cluster. All the articles/tutorials I have seen on ...
0
votes
0answers
18 views

“API” to halt server with HAProxy (by loadbalancer.org) [duplicate]

I have a HAProxy load balancer by loadbalancer.org. I have 3 servers in the cluster and have to halt a server once in a while, for example when I release new code on the server. I would like to be ...
0
votes
2answers
59 views

best way to load balance dual esxi

Im hosting a few websites on a single ESXi box that runs Windows Server 2008 R2 with IIS 7. Now I would like to make sure that if the host goes down, the websites will still be live, so I've ordered a ...
4
votes
2answers
318 views

How to scale up a web server supporting long polling

I am planing to add more web application servers to support increasing clients, deploying HAproxy and Keepalived for load balancing and High availability. My server usage has the following ...
2
votes
0answers
41 views

Multiple httpd with JBoss cluster: provide httpd HA

I have a working configuration like this: +-----+ +-----+ +-----+ +-----+ | i1 | | i2 | | i3 | ... | in | JBoss Cluster +--+--+ +--+--+ +--+--+ +--+--+ | ...
0
votes
1answer
106 views

How to implement High Availability easily?

I have a website that is currently hosted in a single DigitalOcean region. DO are great, but occasionally they have routing issues in a region and the website goes down. The stack is very simple - a ...
1
vote
0answers
25 views

Difference between all servers in one cluster and more than one cluster with servers? [closed]

Not sure I understand what´s the difference or how it works when servers a running in one cluster or if there are more than one clusters with servers in it - regard High availability & Load ...
1
vote
2answers
460 views

Is it possible to balance load between multiple Nginx load balancers without using a hardware load balancer?

I plan to balance load between my app servers using a separate Nginx server as a software load balancer. But actually, it's because a load balancer in front of the app servers allows me to update an ...
0
votes
0answers
410 views

High availability squid farm

I'm trying to configure a high availability squid farm on CentOs 6.4 with haproxy1.5 for load balancing and ucarp1.5.2 for ip failover alongside squid3.1.10, running on each server these are my ...
0
votes
1answer
58 views

How to install pulse during RHEL 5.9 install

I am desperately trying to install pulse on a rhel5.9 machine. I have tried googling all over but all I get are instruction on how to configure pulse/piranha on an already installed box. I have ...
0
votes
1answer
194 views

Solr Replication without using zookeeper

The application that I am currently working on does not need real time indexing. I am using Solr as the indexing engine and I want to setup a High Availability Solr cluster with 2 replica nodes. Seems ...
1
vote
6answers
227 views

Use two website hostings for better availability

I have two VPS servers from two different hosting companies. I want to make some fallback to second VPS if first is not available (preferably automatic). I understand that if I have a single ...
0
votes
1answer
83 views

multi-site web farm for IIS [duplicate]

I am having a terrible time finding information on this and I am hoping someone here can help or point me in the right direction. I am working on a project of setting up an IIS webfarm that is ...
0
votes
1answer
164 views

corosync and multiple load balancers

I am trying to provide HA capabilities for our load balancers (nginx, pgpool and haproxy optionally) using pacemaker/corosync. I have defined three primitives: 1 for the failover IP, 1 for ...
1
vote
0answers
32 views

Prevent NGINX from rerouting to a backend that was previously down

I'm using NGINX's ip_hash directive to ensure that client requests always end up at the same backend server. In the case of a backend server outage, NGINX will reroute to the available server, and ...
0
votes
2answers
219 views

Best way to load balancing between AWS and Rackspace?

I have a SaaS product hosted on AWS and I would like to have the same infrastructure hosted on Rackspace (or any other host) to offer a high availability (eventually load balancing) for my users in ...
1
vote
2answers
509 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
75 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", ...
3
votes
3answers
397 views

How can I create a “fail whale” for my website?

I have a website that we load-balance across a few machines. The load-balancer (a Brocade ServerIron ADX) is on the local network. I know it has the capability to configure a "backup" ip address to ...
1
vote
1answer
517 views

Load balancing with High Availability - SQL Server + IIS using AWS

This is my first time load-balancing with high-availability using Windows and SQL Server. Looking for some validation and input on my planned setup. Now, typically when I want to create a HA ...
0
votes
1answer
152 views

Using Amazon route53 for high availability

Using Amazon Route53 DNS, is it possible to build a highly available setup pointing to multiple web servers not on Amazon? I don't need to worry about session stickyness. Let's assume I have two web ...
1
vote
1answer
125 views

Why state is needed for keepalived

From the doc ! MASTER and BACKUP state are determined by the priority ! even if you specify MASTER as the state, the state will ! be voted on by priority (so if your state is MASTER but your ! ...
0
votes
2answers
361 views

HAProxy — pause/queue all traffic without losing requests

I basically have the same problem as mentioned in this thread -- I would like to temporarily suspend all requests to all servers of a certain backend, so that I can upgrade the backend and the ...
1
vote
2answers
351 views

Drbd Primary/Primary + iSCSI: accessing to different files avoids split brain?

I have a question / curiosity about split-brain on a Drbd Primary/Primary configuration. Supposing two nodes (hosts), host1 and host2 configured with Drbd Primary/Primary and two different shares ...
1
vote
1answer
144 views

Service haproxy error

I want to configure Haproxy for outgoing mail load balancing. my configuration file /etc/haproxy.cfg is. global maxconn 4096 # Total Max Connections. This is dependent on ulimit ...
2
votes
1answer
494 views

Using LVS (Linux Virtual Server) for doing DNS HA

I have been trying to create an LVS DNS HA using CentOS 6.x: Piranha GUI to configure the DNS Pulse is the HA heart of CentOS LB IPTables to configure marks on the packets since DNS uses TCP and UDP ...
-1
votes
2answers
852 views

Simple IP load balancer for web service that runs on Windows XP or Windows 7 Professional?

I've a closed code application that needs to connect to a web service that needs to run on XPs or Windows 7 (desktop). The application can only connect to a single IP address. The application is low ...
1
vote
3answers
801 views

Shared PHP Sessions in Load Balanced httpd environment

I have two httpd servers running PHP on RHEL 5.7. Initially I was sharing PHP sessions between the servers using a common NFS share that was hosted on a third server. This was causing slow downs and ...
1
vote
1answer
986 views

MySQL cluster for Drupal?

We have a pretty busy site based on Drupal and I was thinking of introducing some form of clustering for HA and Load balancing. However, http://drupal.org/requirements says: Drupal supports MyISAM ...
7
votes
2answers
550 views

Multi-site high availability

We have a SaaS application that we need to be highly available. We already have an expensive, well-maintained Hyper-V failover cluster, but today the datacenter where we host that cluster had a ...
0
votes
1answer
488 views

Simple Load Balance Architecture

We currently have a simple 3 server setup: Cloud NGinx/Apache web server (NGinx serves static, dynamic is proxied to Apache/PHP backend) Dedicated Database server Cloud Outgoing email + monitoring ...
5
votes
3answers
471 views

How can I load-balance a load balancer?

I'm about to convert a single-server single-database web application into a physically distributed high-available configuration with servers on two physical locations (for now). Now, obviously, I need ...
0
votes
1answer
221 views

Network GURUs - IP failover combined with load-balancing… Is there such software? Is it possible?

I've been playing around with high-availability solutions for a few days and so far I find UCARP very useful for IP fail-overing. It's dead simple and does the job. I was thinking about taking it a ...
5
votes
2answers
110 views

Insufficient channel capacity of 1GBit

There is a Caching Server (Varnish): it receives data from Amazon S3 on request, saves it for some time and gives it to the client. We have encountered the problem of insufficient channel capacity of ...
0
votes
1answer
231 views

How to use AppScale

There are some wiki which explain how to install and setup AppScale. But I didn't find anything related to the extensive use of AppScale. I mean, what to do in case of major outage ? If the node ...
1
vote
2answers
910 views

High Availability and Load Balancing for MySQL and Jetty

I'm about to deploy two distinct systems: A MySQL cluster and a cluster of Jetty web-servers. 1. SOFTWARE I can get more linux servers for the HA/LB, but which software should I use? I'm with ...
2
votes
1answer
391 views

is it possible to synchronize the states of TCP proxies in real time (for real-high-availability of SLB)?

Consider that there are two server load balancers working in the tcp proxy mode (e.g., for L7 load balancing). Is it possible to synchronize their states in real time so that they can be a backup for ...
0
votes
2answers
739 views

loadBalancing/clustering on IIS/ASP.Net/SQL Server

I've to create an offer for a future ASP.NET application. They wants an high availability(99.9%+). So I'm searching the best solutions with .Net technologies(asp.net mvc 3, IIS 7, SQL Server 2008 R2) ...
0
votes
2answers
469 views

How can I make a high available tomcat cluster with no single point of failure?

I've surfed the web and tried to find a way in order to make a tomcat cluster with no single point of failure , and all what I have found is that I need something called dispatcher which will be ...
2
votes
1answer
468 views

Heartbeat is giving me a heartache

I have 2 Ubuntu 11.04 VM's on which i have installed Heartbeat + apache2 to achieve a "high availability" setup. Heartbeat is up and running on both but im not able to ping the Virtual IP (cluster ip) ...
2
votes
2answers
2k views

Load balancing / Failover for multiple VPS's set across different datacenters

I know many variants of this question has been asked already, but I still can't find a good answer to my needs. What I want to do is setup a few (2 at minimum) VPS's to host my web apps on. I'd like ...
6
votes
1answer
816 views

What's the best practice for hot-redeployment of WARs to Tomcat?

What's the best practice for hot-redeployment of WARs to Tomcat? Say that I have a webapp that serves a long-running type of user (logs in in the morning, uses all say), and want non-stop redeployment ...
1
vote
1answer
162 views

Load balancing with apache2-mpm-itk

I'm doing some research for a project I'm working on, and I'm a bit stumped as to what to do when it comes to load balancing and mpm-itk. I currently have a web server (webA) running apache2-mpm-itk, ...
0
votes
3answers
168 views

Why reverse proxies when HA & LB are possessed by Tomcat & apache? [closed]

Anybody has any strong reason why HeartBeat, HAProxy, NGINX or any other reverse proxies needed for apache tomcat web application when we can have HA and LB with Tomcat supported Clustering with ...
1
vote
1answer
116 views

Create groups of backends depending of the virtual host requested

Say I have 6 web servers behind haproxy. Web servers should provide virtual hosting using apache (apache or nginex does not matter). I would like to be able to specify where the incoming HTTP requests ...
4
votes
2answers
496 views

Google network architecture

I am aware that this question might be closed as "not a real question", "subjective" or even "argumentative". If this is a mistake, I am sorry. I am not good at all at networking but I'm trying to ...
2
votes
2answers
760 views

load balancing, high availability for webapp setup

We have build a special interest social network and need to setup now the proper server setup for the webapp servers. We have for the webapp 5 physical server available (2xE5645 CPU, 24 GB Ram, RAID, ...
1
vote
4answers
672 views

Low cost solution to http loadbalancer single point of failure?

I have many low end atom servers for a startup project, each server have a few public ip addresses (no private network). I'm currently in the process of making it failsafe. There now is a load ...
2
votes
3answers
1k views

Varnish & Heartbeat as loadbalancers

Here is the set up I am trying to accomplish So, what I'm trying to accomplish is: a user goes to 10.0.0.1 it passes it to whichever loadbalancer is managing the requests. I then want varnish ...
11
votes
8answers
3k views

Load balancing Apache on a budget?

I am trying to get my head around the concept of load balancing to ensure availability and redundancy to keep users happy when things go wrong, rather than load balancing for the sake of offering ...