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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1answer
164 views

What is the best way to replicate a large number of SQL 2008 DBs to a failover instance in Amazon Web Services

Our application creates a new sql database for every customer and we will be continually adding new customers and creating new databases every day. These databases can range in size from 3 megabytes ...
3
votes
1answer
343 views

Failover strategy for a 4 servers scenario

I am trying to figure out how to set up replication & failover in a scenario with 4 servers (2 per location) where any server may assume the Master role. My initial scenario is the following one: ...
3
votes
0answers
293 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 ...
2
votes
0answers
41 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
votes
0answers
162 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 ...
2
votes
0answers
204 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
votes
0answers
289 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
0answers
78 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.
2
votes
0answers
232 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 ...
1
vote
0answers
7 views

IP Resource Errors While Building a Windows Failover Cluster on Azure

I have setup a failover cluster in Microsoft Azure on four VMs. I have two nodes in one subnet/region, one node in another subnet/region and a final node in a third subnet/region. The cluster passed ...
1
vote
0answers
30 views

Apache ReverseProxy sets upstream server to error when it returns an error page

We are using an Apache LoadBalancer/ReverseProxy to provide a failover for our web servers. Currently we are experiencing the following problem: A webservice call returns an error with HTTP status ...
1
vote
0answers
25 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) ...
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vote
0answers
76 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 ...
1
vote
0answers
436 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 ...
1
vote
0answers
167 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
0answers
140 views

How to bind CIFS server to virtual IP in Windows Server 2012?

I'm a unix guy who is new to clustering with Windows. I have two Windows 2012 servers that have the StorNext clustered filesystem mounted as drives on each. If I try to add the File Sharing role, I ...
1
vote
0answers
190 views

Unable to remote desktop using failover cluster name

I am using Microsoft Failover Cluster and I have 2 nodes - say node1 & node2. The nodes are successfully accessed by remote desktop. but the cluster name is not accessible. The cluster name is ...
1
vote
0answers
331 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. ...
1
vote
0answers
176 views

High availability setup with 2 tomcat servers in Windows

I am trying to set up a high availability setup(not load balancing, only HA) with 2 tomcat servers. When I google for information, I get tons of links with apache+HAProxy+keepalived setup for linux ...
1
vote
0answers
152 views

keepalived - service not available on the 'passive' host

I've got ip failover configured on two hosts for a mysql (percona) cluster with keepalived; the failover works as expected, but I cannot access the service from the host that is passive or in ...
1
vote
0answers
353 views

Windows 2003 cluster: One node offline causes the cluster service on the other node to fail

I configured a 2 node cluster on 2 Windows 2003 machines with Exchange 2003 The resources: Majority node set Data volume Cluster IP Cluster network name Exchange 2003 system attendant (and all ...
1
vote
0answers
260 views

ISC-DHCPD failover, Modifying host definitions via OMAPI

Background: I'm working on replacing my single DHCP server with 2 in a failover configuration. When I do a DHCP request I see the lease is created in both dhcpd.leases files on each server. However, I ...
1
vote
0answers
443 views

Kerberos high availability failover, Apache Mod_auth_kerb, Using the Kerberos slave is slow

We host our own Redmine rails web application internally with Apache using Mod_auth_kerb and our internal Kerberos for authentication. We have 2 internal Kerberos servers KDC1 and KDC2. KDC1 is ...
1
vote
0answers
156 views

OpenVPN Failover Validation

I've never seen something like this: I'm using OpenVPN Access Server to validate failover between two servers. When I validate their SSH connecction I get this error: ERROR: CONNECT_SECONDARY: ...
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 ...
1
vote
0answers
192 views

Basic solution for IP address failover on Windows

I'm trying to find a basic solution that will allow an IP address to fail over from one Win2k3 server to a standby one. I've got my own programs that can detect when a failure has occurred and trigger ...
1
vote
0answers
65 views

IP migration by filtering

I'm looking for a solution to use virtual IPs between 2 hosts, but in a specific way. I would like to have the addresses bound to both hosts at once, but filtered out on the inactive one (arp ...
1
vote
0answers
730 views

Failover Cluster Quorum Failing

I have two nodes which boots from iscsi to implement windows 2008 cluster. And I'm using disk majority option as quorum over iscsi. But when the quorum's iscsi connection failed(May be san server ...
1
vote
0answers
399 views

Setting up Cisco routers using WIC-1AM interface cards for backup/failover over dialup

I have two 1751 routers using a 56K connection. The routers work with out any issues. I want to add a WIC-1AM to each router as backup/failover. All I need to do for the routing should add a new ...
0
votes
0answers
24 views

MSSQL High Availability Advice Required

I'm looking to implement a high availability SQL installation using MSSQL2012 or 2014 and there is 1 part of this I'm not sure about. I plan to have a SQL cluster at site a, and a secondary SQL ...
0
votes
0answers
21 views

Unable to access MySQL account on Win2008 R2 cluster

I have created a MySQL WFC service on my two-node server, the MySQL server is doing fine until I created an account using the MySQL Workbench of one of the nodes. When I try to connect to the server ...
0
votes
0answers
24 views

FreeRadius Syncing Across Multiple Physical Sites

I've been searching for an answer but I've found the documentation on this to be less than ideal. We have multiple sites spread across the country and we're looking to have a single Freeradius server ...
0
votes
0answers
39 views

ASA failover mode switching from Active/Active to Active/Standby

We have two ASAs with failover set to Active/Active. This seems to work fine for everything we do except using VPN connections. It seems whenever the primary ASA fails over that all VPN connections ...
0
votes
0answers
177 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
votes
0answers
35 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 ...
0
votes
0answers
60 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 ...
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
0answers
287 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: ...
0
votes
0answers
93 views

Create a fail-safe private network between multiple cloud servers

I want to create a virtual private network between two or more virtual cloud servers, comparable to Amazon Virtual Private Cloud (Amazon VPC is not an option, as the servers are not hosted at AWS). I ...
0
votes
0answers
50 views

FreeIPA issue: after ipa1 server kernel panic, not switching to ipa2 failover server

Our setup is as follows. All machines are running under Centos 5.8. We have a gateway machine with a firewall, gw.example.com, through which all external traffic is funneled. Behind it we have 2 ...
0
votes
0answers
42 views

SQL DTC Failover Scenario

We had an interesting scenario in our clustered production environment last week. SQL 2008/R2 two boxes clustered on Win 2008/R2 in Active/Passive mode. On the active node A, the clustered MS/DTC ...
0
votes
0answers
103 views

Limit Devices on SonicWall FailOver Connection

We'd like to use a SonicWall to configure a failover Internet connection that will likely use a Verizon 4G "jetpack". We don't anticipate having to use this very often but when we do we are concerned ...
0
votes
0answers
64 views

Best strategy for maintaining different config file versions for failover

I have two servers. They're both LAMP servers with one as the primary public facing machine and the other as the secondary. Right now I have a script on the secondary that monitors the primary. If ...
0
votes
0answers
321 views

Server 2012 cluster - SAN volume - failover not working

The following configuration is available: - 3 HP SAN disk Enclusores / 2 SAN controller; HSV200 (FC) - 2 HP Brocade SAN switches - 2 HP blade servers, each with a QLogic FC HBA QMH2462 - SAN volume is ...
0
votes
0answers
34 views

How can I set up the most manual sort of failover possible?

I do not want my servers to automatically fail over, even if it means an hour of downtime. I have synchronous replication in my DB, and I have 4 servers (2 app and 2 database). How can I use virtual ...
0
votes
0answers
67 views

Can a File Server resource be brought online if there is no dependency Disk provided in Microsoft Failover Cluster?

We have a Failover cluster having 2 nodes and we have set up a File Server resource which has 3 disks related to 3 File Server resources. I tried to create a new File Server share in that same service ...
0
votes
0answers
71 views

Can I use pound to fail-over to a different site/location?

We recently opened new offices at a separate location/state and I want our web services to fail-over to this new site/location. Is it even okay to do this over the internet (no VPN)? Would pound ...
0
votes
0answers
162 views

proxy server with failover on string detection

I am looking for a proxy server with failover on string detection. I have a 3rd web application that fails and displays an error message. Since the server is "technically" up DNS failover doesn't ...
0
votes
0answers
55 views

SQL Server 2008 failover clustering

Yesterday a power surge took out our SQL Server. Had to have the motherboard replaced and everything. Not good. Anyway, I'm now looking into failover clustering to prevent such an event from ...
-1
votes
0answers
37 views

Failover configuration on Cisco sf300-24 and two Windows 2008 R2

I have two Windows 2008 R2 server connect to a Cisco sf300-24 switch in customer environment. They provided us two IPs xxx.xxx.40.156, xxx.xxx.40.157 and let these IPs accessible from and to their ...