0
votes
1answer
39 views

Apache mod_proxy_balancer + Tomcat load balancing - Should not redirect until web applications are ready

I am using apache2 mod_proxy and mod_proxy_balancer to balance the load to 4 seperate tomcat8 instances on different servers. I am using different AJP ports for each tomcat instance and using jvmRoute ...
1
vote
1answer
44 views

How to make Nginx fire 504 immediately is server is not available?

I have Nginx set up as a load balancer with cookie-based stickiness. The logic is: If the cookie is NOT there, use round-robbing to choose a server from cluster. If the cookie is there, go to the ...
0
votes
1answer
175 views

Nginx GeoIP load balancing with failover

I am attempting to set up a test Nginx load balanced environment. So far I have sucessfully configured a load balancer nginx-balancer1 and 3 servers to serve webpages nginx1, nginx2 & nginx3. I ...
1
vote
1answer
77 views

Configuring multiple Nginx load balancers for failover

I am attempting to set up a test Nginx load balanced environment. So far I have sucessfully configured a load balancer nginx-balancer1 and 3 servers to serve webpages nginx1, nginx2 & nginx3. ...
1
vote
2answers
411 views

Failover for server with dual WAN

I have one mail server, one SonicWall firewall, two Internet providers, and an internal DNS server. I have WAN failover set up on the SonicWall so in the event that the primary connection is down ...
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 ...
2
votes
2answers
402 views

Azure Load balancing internal instances of web/worker roles?

As far as I know Azure does not have a load balancer for internal services, internal endpoints are not load balanced. But can someone have implemented a "soft" solution, or can advice me some helpful ...
0
votes
1answer
62 views

Detect if the original node failed in tomcat cluster

I have two nodes in a cluster. Node1 initially servers requests. Loadbalancer redirects the request to node 2 if the first node fails. I would like to know if there is a way for the Node 2 to detect ...
-1
votes
1answer
3k views

CentOS Dual WAN - Load Balance and Failover

I am setting up a Linux server (CentOS) to act as a router with load balacing and failover (when one internet line is down, another one should take over). The clients conected to eth1 ( LAN ) should ...
2
votes
1answer
337 views

nginx failover without load balancing

I'm having trouble with configuring nginx. I'm using nignx for reverse porxy. I just want to send my all requests to my first server. But if the first server is down, i want to send requests to ...
0
votes
1answer
57 views

one website on 2 servers [closed]

i want to put my website on 2 servers, When server #1 is down, my site loads from server#2 . How can i do this? i want this 2 servers synced realtime... is there any software for this? or any trick? ...
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 ...
0
votes
1answer
122 views

Software load balancing fail-over vs hardware [closed]

Please correct me, but my understanding is that with software load balancing a service must be run on each server while there is one DS that notifies the other servers that a server has gone down and ...
2
votes
2answers
146 views

Ways to do simple failover with one server and two IPs

The setup is one server (Windows 2008) at one location with two incoming connections. As the server has to interface with various on-site devices, and will have a small number of incoming ...
1
vote
0answers
291 views

Squid on windows loadbalancing only to one server

After thousands of googles and trying days i cant get the load balancer/failover in squid on windows to work. Iam using squid 2.7. My webservers are 2 single NIC lighttpd and one dual nic lighttpd. ...
3
votes
2answers
823 views

DNS Round-robin, Load Balancing, Load sharing, and failover in 2012

I have been reading many posts on serverfault as well as on other sites regarding all these. What I understand is, Multiple A records(round-robin dns) can be used for both : Load sharing ...
0
votes
1answer
1k views

Loadbalancing JBoss with haproxy AND mod_jk

I've been tasked to explore ways of building a very fail-resistant configuration for a professional application developed for JBoss. I have a somewhat fixed hardware configuration (servers have ...
1
vote
2answers
94 views

High available and secure FrontEnd to WebApps behind a firewall [closed]

my question is about proposed implementation of high available and secure FrontEnd to WebApps behind a firewall. The components of the network and their relationships are as follows: 1) 2 WebApps ...
0
votes
1answer
118 views

Stop Nginx from accepting new connections on error

I am running an nginx server behind a separate (L-4) load balancer that basically just serves static files and forwards requests to a downstream web server. This works great as long as all the ...
1
vote
1answer
174 views

How can I implement a high availability service with JBoss 5?

I've tried to implement a high availability service with JBoss and Apache. The architecture is: Apache | | | | JBoss1 JBoss2 There is a balancer implemented from Apache to the ...
3
votes
4answers
6k views

AlwaysOn SQL Server 2012 - any option for true active/active?

I'm about to upgrade and consolidate a group of SQL Server 2008R2 to a single SQL Server 2012. I want have high availability and looking for the different options. The number of databases is fairly ...
2
votes
1answer
268 views

Akamai Website Fail-over trigger

My organisation currently has 2 data centres from which it hosts its corporate website, with Akamai providing load-balancing, and other CDN services. Now, I'm told that if our server stack in 1 data ...
1
vote
2answers
494 views

Several load-balancing servers listening on single IP/port?

Let's say I have a fully working, load-balanced application server environment. All servers have to fail-over gracefully. It's relatively easy to do with the application servers, but how can I ...
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 ...
6
votes
1answer
3k views

Pacemaker Active/Active haproxy load balancing

I am using Haproxy to load balance replicated mysql master servers. I am also using Heartbeat and Pacemaker for Active/Active ip failover with two virtual ips on the two load balancers for web server ...
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 ...
0
votes
1answer
127 views

Quickly Routing Web Traffic From 1 Web Server to Another

We need a solution to route web traffic from 1 web server to another. We have 2 dedicated Windows 2008 Servers with our hosting company. 1st server is our main web server and the 2nd is a back-up ...
1
vote
0answers
1k views

ISC DHCP fails to sync leases between peers

I use ISC DHCP version 4.1.1 on Debian GNU/Linux on both servers. I tried to solve the following problem using various versions of ISC DHCP but it remained the same. My configuration for failover ...
0
votes
2answers
572 views

Can I configure mod_proxy to use different parameters based on HTTP Method?

I'm using mod_proxy as a failover proxy with two balance members. While mod_proxy marks dead nodes as dead, it still routes one request per minute to each dead node and, if it's still dead, will ...
0
votes
1answer
2k views

Simple setup for load-balanced and fail-over tomcat?

Being new to Tomcat infrastructure, I am wondering what an advisable setup would be to have two physical machines each running a tomcat instance to be load-balanced and capable of failover to each ...
0
votes
1answer
499 views

Multiple gateway + load balancing in linux gateway

i have a problem with load balancing/Fail-overing with Linux gateway my network look-like this now, i want users in internal LAN (192.168.1.x), has connect with both line. is any solution excuse ...
4
votes
2answers
8k views

How to setup HAProxy with failover?

I understand that, to get failover on an HAProxy load balancing setup, you need two machines running HAproxy (and route it to several webserver instances). But in this case, say abcd.com, how do we ...
1
vote
1answer
662 views

error_page doesn't seem to work with nginx upstream directive

I am trying to use nginx to load-balance a couple of downstream app servers, and to show a "fail whale" style page if all the downstream servers are offline or unresponsive. Unfortunately, the nginx ...
4
votes
6answers
3k views

Redundant Load Balancers for Windows-based Web Servers?

I'm having some trouble trying to figure out the technical details of the below design; specifically in the area of the redundant load-balancers. The web servers are running Windows Server 2003 R2 64 ...
1
vote
3answers
4k views

Is it possible to make redundancy on HAProxy server?

I am going to use HAProxy as a load balancer that will balance requests on 3 application servers. But what if balancer server (HAProxy) fails at some point? I was thinking of cloning the first ...
2
votes
4answers
224 views

Question regarding uptime strategy for website

I'm working on a website where we need to have a good deal of uptime. Specially in the short bursts (15-day periods) that the website's events happen. The page is dead simple and can be served ...
1
vote
2answers
125 views

What to do if the failover fails?

I am looking to setup a failover in the following configuration - Failover Server (Frontend) Primary Server - Secondary Server (used if primary server fails) (Backend) So traffic goes to the ...
1
vote
2answers
205 views

Geographic web+pgsql load balancing

My goal is (don't know if this is possible, that's why I'm asking): have two separate geographic locations. At each location, a web server and a postgres database run. The application is the same at ...
11
votes
2answers
7k views

LVS vs HAProxy, which should I choose?

I am looking for a solution to load balancing and failover strategy, mainly for big web applications. We have many services to be balanced, such as web, MySQL, and many other HTTP or TCP based ...
3
votes
6answers
2k views

How do I set up failover for a single web server using two ISPs?

I have one web server and two WAN connections (1 cable, 1 DSL). DNS is run offsite, and points to the IP address assigned by one of the ISPs. How can I have the second connection take over when the ...
2
votes
5answers
1k views

Device to manage 2 dsl connections - failover, load balancing and bonding

I'm setting up an offsite DR facility on a budget. The office has 2 ADSL lines coming in to identical router/modem devices. I'm looking for a cost effective (cheap) way of joining the two connections ...
2
votes
3answers
1k views

Aggregate multiple WAN connections (DSL, WiFi, WiMax) with a static IP, without BGP

Is it possible to use two VPN or MLPPP routers to aggregate, load balance, or fail over between WAN connections from a number of different providers? Two conditions: 1. We need to keep the external ...
8
votes
3answers
13k views

nginx automatic failover load balancing

I'm using nginx and NginxHttpUpstreamModule for loadbalancing. My config is very simple: upstream lb { server 127.0.0.1:8081; server 127.0.0.1:8082; } server { listen 89; ...
2
votes
2answers
764 views

What happens when a load balancer fails?

Let's say I'm using Amazon's EC2 load balancer. I have it hooked up to two instances (excuse me if my terminology isn't correct). What happens if the load balancer fails? Do both instances fail to ...
2
votes
2answers
236 views

How to manage service failover?

I am using Windows Network Load Balancing to keep my apps available even when one of the servers is down. The problem is that it only detects when a whole machine is down. It happens sometimes that ...
1
vote
1answer
2k views

Failover or load balancing configuration on Apple Xserve and Mac OS X Server Snow Leopard (10.6)

I'm currently installing a number of Apple Xserve boxes running Mac OS X Server (10.6). After poking and prodding for a while I can't find any obvious way, or documentation telling me how, to set up ...
1
vote
1answer
828 views

Reverse Proxy failover scenarios?

I currently have 2 apache web-servers that run ldirectord/heartbeat to load balance between them. Whenever I reboot one of the web-servers, or take it down for maintenance, ldirectord automatically ...
5
votes
1answer
2k views

DNS Round-robin failover and load balancing

Having read all of the questions and answers (1 2 3 and so on) on here relating to DNS load balancing, and Round-robin DNS, there's still a number of unanswered questions.. Large companies, and I'm ...
2
votes
4answers
1k views

CherryPy, Load Balancing, and Remote Failover

Our company's current customer-facing site & intranet site is currently built on Classic ASP running on IIS 6. The current site only contains about 10 customer-facing pages, and an internal site ...
3
votes
4answers
2k views

Apache Failover and Load Balancing

I am working for a small finance firm as a Web Application Developer. Our company has an interal website coded in PHP and running on Apache. Recently our server went down and the website was down for ...