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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DNS failover across multiple datacenters?

I've got a site that is starting to get a lot of traffic and just the other day, we had a network outage at the datacenter where our loadbalancer (haproxy) is hosted at. This worried me as despite all ...
2
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1answer
123 views

Failing back from DNSSec to regular DNS

A disaster recovery plan has been proposed in a client's company that would fail back from DNSSec to regular DNS in the event of 1) A major site outage requiring the change of many DNS records 2) ...
2
votes
1answer
1k views

heartbeat: Bad nodename in /etc/ha.d//haresources [node1]

I'm trying to start heartbeat on Ubuntu 10.04 with service heartbeat start, but getting the following errors: heartbeat[24829]: 2011/11/22_19:31:07 ERROR: Bad nodename in /etc/ha.d//haresources ...
2
votes
1answer
434 views

Is it a bad idea to use RAID 1 and NBD to create a mirror of a disk for failover?

What I wanted to do is to create a mirror of one machine's disk on a failover machine so that, in the event the primary machine failed, I would just reboot the failover, select a different root ...
2
votes
3answers
69 views

How can I set up temporary failover for a “write-only” smb share?

I am tasked to set up a storage server which will be used to "receive" data from an Illumina machine running very expensive DNA sequencing operations with limited interruptibility. The sequencer ...
2
votes
1answer
2k views

Configuring Secondary DNS to Work if Primary is down (Bind)

I have a master slave DNS server setup with bind. The secondary DNS server is working correctly and resolves any queries sent to it. However, when the primary DNS is down, it seems that the secondary ...
2
votes
1answer
2k views

Linux filesystem of VM becomes crash or read-only at Citrix XenServer

I read some answers related to this problems. Will the OS crash if the system partition can't be access for a short period? But I cannot solve this problem. When using ISCSI as Storage Repository ...
2
votes
1answer
291 views

Change hostname on linux ha failover case

I have configured two machines to do a warm standby so that machine 2 can take the ip of machine 1 if that should fail and become its replacement. sadly, thats not enough, i need to change the ...
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votes
3answers
1k views

Monitoring an ISC DHCP Failover Status Using Nagios

I recently implemented ISC DHCP Failover and it's working beautifully, but I'd like to monitor the current status of the failover using Nagios. Ultimately, I would like my Nagios check to: report ...
2
votes
1answer
478 views

Failover/redundant SSH

I have an SSH server where multiple clients SSH in to maintain a bunch of port forwards. What I want to do is, if the server goes down, have the clients automatically connect to the next server. The ...
2
votes
1answer
823 views

Getting heartbeat to fallover when apache service fails

I've currently got heartbeat set up nicely on ubuntu linux server so that if the heartbeat service is not detected (either because the server is down or just the heartbeat service is down) it ...
2
votes
3answers
1k views

Is there any open source solution for failover of incoming traffic?

We have two ISP's and both ISPs' IP NAT with the same webserver IP. I want failover for incoming traffic, is there any open source solution? Can I do it by making two name servers, one for each ISP? ...
2
votes
1answer
448 views

Intermittent unavailability of an instance in a failover cluster while a standby node is offline in a SQL Server 2008 failover cluster

I've got a small failover cluster that I run for the websites my company has. During a RAM upgrade of the standby server, our websites started to show errors about not being able to access the ...
2
votes
2answers
684 views

Configure Hyper-V Server 2008 R2 Failover Cluster from Windows Vista

How do I configure Hyper-V Server 2008 R2 Failover cluster capabilities? Can I use mmc from a vista system or do I have to use Powershell?
2
votes
1answer
707 views

EC2 database server failover strategy

I am planning to deploy my web app to EC2. I have several webserver instances. I have 1 primary database instance. I have 1 failover database instance. I need a strategy to redirect the webservers to ...
2
votes
1answer
306 views

TFS failover options for single server?

What are people using for TFS (2005) failover when using a single server configuration? It seems that most help docs from MS are about dual config (app and data tiers). In fact I found a msdn blog ...
2
votes
5answers
493 views

How do you redirect dns in case of line downtime?

We are considering to selfhosting for a domain. How can we provide a page to visitors in case of lines out, serverfailure or powerfailure?
2
votes
1answer
30 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 ...
2
votes
0answers
42 views

Failover web hosting with multiple NS

Are there any drawbacks in having each nameserver entry in a domain name point to different failover server? In this setup, the same DNS server will also serve the content - so if it's down, the ...
2
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0answers
210 views

Keepalived failover not working for Static NAT target behind Cisco ASA

I've got a Cisco ASA[0] with a pair of Linux boxes in the DMZ running Keepalived and HAproxy acting as a load-balancing failover pair for another pair of Windows servers, also in the DMZ. I'm ...
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1answer
1k views

KeepAliveD, Rackspace Cloud, Unicast - both LB's enter MASTER state…?

I have set up two HAProxy Load Balancers in an Active->Passive pair. KeepAliveD will be used for failover between MASTER and BACKUP servers. Like most clouds, Multicast is not supported so I cannot ...
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votes
0answers
286 views

TeamCity (or Jenkins) with Cluster/Replicated servers

We use Team City 7 for Continuous Intergration. Sometimes I need to bring down the server for maintenance which stirs up complaints. Is anyone using a cluster for these types of servers where there ...
2
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0answers
379 views

Openldap Mirror Mode replication failover

We have currently one master ldap server and around 400 slave servers which are partially replicated through that master.All openldap versions are same and 2.4.31 What we want is actually if master ...
2
votes
1answer
223 views

SQL Server 2008 R2 Failover Clusters behaviour on multiple failures

I'm testing the resilience of one of our test systems. We have 2 x DB (SQL 2008 R2 on Server 2008 R2, running in ESXi VMs) arranged in a Failover Cluster. Shutting down the Active SQL Server service ...
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0answers
97 views

Solr on a two node Jboss cluster

Are there any issues with deploying Solr on two node jboss cluster with the index shared on a NFS mount point? We would like to do this for high-availability across data centers.
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0answers
287 views

JBoss: switch domain in case of failure

In a cluster configuration of 2 different physical servers, managed with the domain setup, where one of the servers is the master and acts as a domain and the other is the slave and gets the ...
2
votes
2answers
156 views

DRBD(-alike) solution to enable failover for spool files

Im about to setup a failover-setup for our Kannel service using hardbeat and DRBD. One machine is the primary one, when that one dies/goes down, it switches to the secondary. Kannel is using a spool ...
2
votes
1answer
179 views

VPS hosting with IP failover across datacenters

Is there any VPS hosting that would allow IP failover (or remapping) across different datacenters ? The only one I aware of is EC2 with their Elastic IP. What I'm trying to achieve is to have servers ...
2
votes
1answer
162 views

Failover of mirrored webservice

We are using a webservice (over http) which has 2 mirrored servers, accessible as, say www.blah.com and www2.blah.com. Is there a software solution that would help us handle failover? Currently if one ...
2
votes
1answer
370 views

SQL Server Database In Single User Mode after Failover

Here is a weird situation we experienced with a SQL Server 2008 Database Mirroring Failover. We have a pair of mirrored databases running in high-availability mode and both the principal and mirror ...
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4answers
1k views

Active directory failover

I have a Windows Server 2003 SP2 server which is runnig as Active directory for my testlab.com forrest. I observed that "netlogon"service is frequently stopping automatically as it results unable to ...
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vote
5answers
2k views

Free DNS software with failover support? [closed]

I'm looking for DNS software that can accomplish the following: Check health of all A records at set intervals If server is unresponsive after multiple successive checks, replace A record with a ...
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vote
3answers
5k 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 ...
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6answers
3k views

Does anyone know of a free solution to perform failover for VMware ESXi? [closed]

I would like to setup a free/custom solution to perform failover for VMware ESXi. The setup is as follows: 2x Physical servers each with independent storage. For each physical server there are 2x ...
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vote
5answers
1k views

Eliminate single point of failure for webservers?

I know in DNS, that each of the DNS servers will be tried to see if they will respond I know in email that in the event of a failure it will go to the next one in the list or it will hold the mail ...
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vote
8answers
3k views

Dual WAN Router w/Failover for < 50 IP Network Recommendation

Looking for a good dual WAN (for failover, don't care about load balancing) router for a small network (<50 devices). I don't want anything home-grown - has to be commercially supported hardware. ...
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vote
5answers
2k views

How to accomplish a Windows share failover system?

I have a primary and a backup windows 2008 server, and a bunch of windows XP clients that map a drive to a share on the primary server. If the primary server goes down, I want those client machines to ...
1
vote
2answers
936 views

How do I do IP Failover for my Public IP address with Linux HA

I did a lot of experiment with heartbeat, corosync and pacemaker for IP FailOver which I have to do with Public IP. I did more than one ip failover(VIPs) with two nodes, also with three nodes BUT ...
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vote
4answers
246 views

Are there any open standards for server failover?

I'm building a client-server application and I am looking at adding failover to the client so that when a server is down it will try to connect to another available server. Are there any standards or ...
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vote
6answers
772 views

Server Failover Scenario

I've got two Dell PowerEdge 2950 servers. In order to (hopefully) eliminate any downtime, I must implement a solution to detect and adjust to component failures, environment failures, etc ... the ...
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vote
2answers
585 views

One website, two public IPs, each IP on separate line, how to do failover

We have a website that sits behind two firewalls, main and failover. Main and failover firewall have different IPs, and different Internet connections from different providers. How to provide failover ...
1
vote
4answers
113 views

Just one client bound to address and port: does it make a difference broadcast versus unicast in terms of overhead?

Scenario: I am implementing failed over for a network node, so my idea is to make the master node listens on a broadcast ip address and port. If the master node fails, another failover node will ...
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vote
2answers
605 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 ...
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vote
1answer
275 views

How to connect drive array to redundant motherboards?

How should one connect a small storage array, four 3TB SATA drives for now, to two motherboards or controllers as a failover system? This means avoiding adding another single point of failure such as ...
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vote
2answers
2k views

Best option with 3ware 3DM2 when drive has bad sectors?

I have a FreeBSD server running a RAID 5 array using the 3ware hardware controller 3DM2 (user guide PDF). It uses 3 hot-swap drives + 1 spare. The last couple of months one of the drives have ...
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vote
3answers
477 views

Windows Failover (100% Uptime for critical ops) Hosting Recommendations

I have been searching for a windows hosting provider that has a failover for 100% uptime, and I wanted to get your opinions and recommendations on this. Our software will be hosting mission critical ...
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7answers
514 views

Mirroring Drives

I'd like to mirror a drive between two windows servers for fail over/disaster recovery. I assume there is a software package for this. What do you use?
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1answer
131 views

Hyper-V Manager/Server failover/redirections

I have currently one Hyper-V Server 2008 R2 server installed, it's successfully running 4 VM's, but memory/RAM is starting to become sparse. I actually have a 2nd machine available, so my great idea ...
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vote
2answers
770 views

Linux server failover

I have two Linux servers (CentOS6) - both are identically configured connected to the same switch with a direct link between them. I only have one external IP that is assigned to eth0 on both servers ...
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2answers
442 views

High Availability without IP Failover?

Are there strategies or techniques to create HA environment when IP failover isn't available? I'm reading a guide at Linode's library which describes exactly what I want to do, but I'm not sure my ...