In computing, failover is automatic switching to a redundant or standby computer server, system, or network upon the failure or abnormal termination of the previously active application, server, system, or network. Failover and switchover are essentially the same operation, except that failover is ...

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0answers
30 views

Load Balancing For 2 Servers on Different Datacenters [on hold]

I am using Ubuntu 12.04 and I need to implement simple/effective Load Balancer / Fail Over System as per the below requirements: a. It should balance the load between two different public IPs (two ...
0
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0answers
12 views

RTMP Proxy Server

I have an application which uses both HTTP (content data) and RTMP (video streams) for communications. An nginx server is configured for load balancing and proxying incoming client requests. It works ...
0
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2answers
28 views

Keepalived loses VIP upon power cycle of master

I have two servers running Keepalived 1.2.7 with hostnames left and right. Here are the configs: # keepalived.conf on left vrrp_instance VI_1 { state MASTER interface eth1 ...
0
votes
1answer
21 views

Apache loadbalancing - how to get reported about server fault

I am a newbie about load balancing so sorry if the question is trivial. I set up a basic load balancing using one server as a load balancer (planning to add at least one more with heartbeat) and for ...
-4
votes
0answers
36 views

Software-based private network [closed]

This might be a stupid question, but is there a way (or what are the options) to create a software-based private network between dedicated servers (so, no VPSes)? Meaning having private IPs or ...
0
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1answer
36 views

Mongodb replica failures to resolve DNS when primary DNS is stopped while secondary DNS is operational

I have setup mongod replica consisted of 3 nodes + 1 delayed hidden node + arbiter. I have setup DNS: primary and secondary internal DNS (bind) servers, so that I can reference nodes by normal FQDN ...
2
votes
1answer
114 views

What are the options for a HA system?

I'm looking into creating a HA Linux machine for my client's website. What are the main options I have, or a place/article where I can find out more? I would LOVE if it was a single-image, too, so ...
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votes
1answer
23 views

Is MOSIX the easiest way to build a redundant system?

I'm trying to figure out the easiest way to build a server with HA. I looked into Linux-HA, Heartbeat, Mesos. I then found MOSIX. I don't know if it's a thing from the past that no one uses, but ...
1
vote
0answers
14 views

Deploying High Availability Remote Desktops on Server 2008 R2 Ent - Do they have to be virtual desktops

I am looking at upgrading an existing 2008 R2 RDS Server to be part of a high availabilty environment. (It cannot be 2012 or 2012 R2 due to management not liking Windows 8 UI and associated training) ...
0
votes
1answer
56 views

Can HAProxy reconnect a websocket to another backend server transparently?

I'm new to HAProxy so this might have an obvious answer but I wasn't able to find it. Consider this setup: two backend web applications; one HAProxy in front of the web applications; many clients ...
1
vote
0answers
31 views

Keepalived configurations

I installed keepalived on two firewalls to provide fail over. I'm not sure if the following configurations are correct (see configurations below). Sometimes I have problems to reach the websites ...
0
votes
1answer
31 views

Hosting self hosted WebAPI in Windows Failover Cluster

I've got a windows service that is self-hosting the Asp.Net WebAPI. This works great and I can send GET requests successfully. However I am also trying to host this service in a Windows 2012 ...
0
votes
0answers
15 views

Windows 2008r2 Failover GeoCluster Quorum Votes

Windows 2008r2 Failover Cluster with SQL 2012 always on Geo cluster. I have: 2 nodes setup with equal nodeweights = 1 DFS Witness has a nodeweight of 1 equaling 3 Votes for the cluster. setup ...
2
votes
1answer
19 views

Website failover across internet connections

Requirement For a network having 4 static IP internet leased line connections linked to hosting a website. What are the current strategies one can apply to ensure high availability in case of ...
1
vote
1answer
92 views

pfSense failover and OpenVPN site-to-site

I have two pfSense Clusters, and am trying to connect them with an OpenVPN site-to-site VPN. Initially, the client was a single pfSense system, and all was well. Now that one system is a cluster, and ...
0
votes
1answer
28 views

Active-passive xenserver bond availibility after stacked switch failure

Citrix documentation for Xenserver recommends that when physicals NICs participating in an active-passive bond, need to be connected to different switches, the switches must be stacked.. Would the ...
7
votes
5answers
534 views

Hot spare host vs cold spare host?

We have several hosts where we have an identical hot spare host, which is patched and updated so it is very close to have to same software and config. In case of failure the network cable is switched ...
0
votes
1answer
12 views

Supporting writes on bind9 failover

I want to set up a redundant DNS based on Bind9, including failover for write operations. I have DHCP dynamically update DNS based on client hostnames, and I need this functionality to continue to ...
0
votes
0answers
104 views

XenServer HA (failover VM's) without shared storage

In the university from Uruguay where I work, we have 2 IBM BladeCenter S with 4 server blades each one. Each blade have XenServer 6.2 installed and working. Our idea is have each BladeCenter in ...
0
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1answer
74 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 ...
0
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1answer
46 views

Redirect PowerDNS on Failure

I've been searching around, but cannot seem to find an answer so I apologize if this has been asked here before. I had two PowerDNS servers - ns1 and ns2 (which are in different datacenters). Both ...
0
votes
1answer
86 views

HDFS' ZKFC service unable to start

Introduction CDH4's ZooKeeper Failover Controller (ZKFC) has been installed. Starting the ZKFC service: [vagrant@localhost ~]$ sudo service hadoop-hdfs-zkfc start Starting ...
0
votes
3answers
58 views

One domain hiding two servers

For our SaaS web-app we have two identical servers in two geographically separated data centers. FOO_1 is the production server and does real-time (MySQL master-slave) replication to its backup ...
1
vote
1answer
56 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 ...
1
vote
2answers
76 views

Windows Server 2008 DNS Forwarder Failover

When setting up and testing DNS forwarders I am finding that if the primary is unreachable 2008 will still try it for every query before trying the secondary. The default timeout before querying the ...
1
vote
1answer
67 views

DFS Replication Manager on Failover Cluster Nodes

I currently have a VM architecture setup for high availability / manageability. The one point of failure is that I have a single windows 2008 machine that runs DFS replication across the servers in my ...
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votes
2answers
67 views

Hosts File Failover [closed]

My software uses DNS Name to connect to the Server. My Clients sometimes need to work off site and in such a case they use Hamachi to connect to the server. I would like to know if it is possible to ...
0
votes
1answer
51 views

mongodb on aws 2 region replication

I think I already have the answer, but I'm a developer so thought I'd check here first. There are AWS regions with more than 2 zone, but some with only 2. E.g. Sydney. Now if I were to deploy a ...
2
votes
2answers
85 views

When to employ server failover in a virtual environment

This question kind of got me thinking about fault tolerance in DHCP, so I did a little digging in my current environment and discovered that we only have 1 DHCP server per major site in our company ...
1
vote
0answers
260 views

XenServer IP Failover OVH not working

I have got problem on XenServer with IP FailOver in OVH. I did everything what is in this official tutorial http://help.ovh.co.uk/BridgeClient and IP not working. On my VM is Debian 7 64bit I set MAC ...
3
votes
0answers
140 views

Most VMS refuse to start

Setup: Virtual Host, running server 2012, hosting around 10 production VMs Problem: Last night, 2 VMs stopped with no warning, event log notification, or any information. The rest of the VMs on this ...
1
vote
0answers
116 views

Dreamhost DNS to AWS Route 53

I'm looking to setup DNS failover for config.webconverger.com and I think Route53 is the best option to get it going. However I'm confused how to export the DNS zone from Dreamhost to Route 53, ...
1
vote
1answer
593 views

Failover Cluster Client Access Point Only Responds to Pings on the Owner Node

Background We're running two VMs (Windows Server 2012 R2) on Azure with SQL Server installed, set up as an availability group. We also, of course, have another VM as a dedicated DC. These are all ...
0
votes
1answer
92 views

Which technique should be chosen for IP failover with manual control

I have the following setup, Linux stack, with front-end running nginx proxy and static assets and back-end running Ruby on Rails and MySQL in master-master replication: Primary site: front-end.a, ...
1
vote
2answers
56 views

Multiple DNS servers for website failover

I know this is a bad "solution", if its even one, but due to the circumstances I think it fits. If Server A runs ns1.example.com and Server 2 runs ns2.example.com and both are hosting an exact ...
0
votes
2answers
74 views

how to recover from a failed web server or reverse proxy

I have the following setup in my datacenter. Global LB --> HA proxy (2 instances on different servers via VRRP, performs HTTPS termination, acts as reverse proxy) ---> Nginx(2 instances on different ...
0
votes
1answer
250 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
98 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
193 views

Redundant routing (active/backup) on linux

I'm currently trying to setup a redundant routing on RHEL 5. The target goal is to have a primary route to a subnet and a backup route to that subnet, to be used only if the gateway of the primary ...
0
votes
0answers
47 views

IP Failover - Configured, but disabled

I have multiple debian servers on which I configured "IP Failovers" or "Floating IPs". My floating IP is 10.0.0.2 and I have an A records: www.example.com pointing to this IP. I configured this ...
3
votes
3answers
198 views

How much failover redundancy is enough? [closed]

I'm working on a client-server system where all clients currently submit their transactions to essentially a single west-coast IP address to reach what is called the "gateway" application. The ...
0
votes
1answer
45 views

ScreenOS Failover tunnel

I have a route-based vpn from my site (Netscreen204) to a customer site (Fortinet) . They want a second, backup tunnel in case of failure, and will be using the Fortune there too. The only thing I ...
0
votes
0answers
18 views

Is it possible to have VOIP and data share a common fail-over connection?

Internally, VOIP and data services are wired separately. They operate on two mutually exclusive networks, with separate broadband connections. Currently, there is no fail-over backup for VOIP ...
0
votes
1answer
227 views

MongoDB Failover Replica Set

I'm newbie to mongodb replica sets and sharding.. I am setting up IP Failover on two servers. I set up DNS failover at AWS route 53 to switch the IP address in case the main server goes down. I also ...
0
votes
2answers
192 views

Can Nagios monitor a service only by hostname?

I have two hosts server1 and server2 where I do manual fail over. The C record master-server then points to the one which is the master. Only the master host should have a certain service checked. It ...
0
votes
2answers
121 views

SQL Server Failover Cluster on Azure (HA Strategy)

In the context of SQL Server 2012 Standard Edition, is it possible to make Azure Blob storage available to a SQL Failover cluster directly as a shared SCSI resource on a Windows Cluster? An Azure blob ...
4
votes
2answers
338 views

How to handle IP's with manual failover?

I have two identical storage hosts where the master is the only one the users can access. If the master fails, then I want to manually change the DHCP address, so instead of master points to ...
2
votes
1answer
281 views

HyperDB Configuration Master/Slave

Running on server 2008 R2 IIS 7.5, with a MySQL Master/Slave (also on server 2008 r2), and WordPress 3.7. Is it ONLY compatible with wordpress 3.5.2? If that is so is there any other plugins to allow ...
0
votes
0answers
48 views

Automatic failover in SQL server alwayson availability group

I have 2 nodes in my SQL server fail over cluster. I use SQL server 2012 always on feature for HA purpose. The problem is that when one my server goes down the automatic fail over does not happen! ...
0
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0answers
185 views

keepalived - random re-elections

We have set up 3 servers running keepalived . We started noticing some random re-elections occurring which we can't explain so I cam here looking for advice. Here is our configuration: MASTER: ...