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 ...

learn more… | top users | synonyms

0
votes
2answers
33 views

How to setup failover with rabbitmq cluster with a loadbalancer like f5

I have been trying to find information on f5 developer central and internet regarding the following setup with no luck. We want to have a rabbitmq cluster with 3 nodes. 1 node will always be primary/...
0
votes
1answer
45 views

Failover server for EC2

I have one Amazon EC2 instance of Windows Server which is running application with SQL server. Our users from On-premise use RDP to login into this server using Elastic IP and do their work. I want to ...
0
votes
0answers
6 views

In LVS with keepalived, should different virtual servers have different virtual routers?

I have LVS with Keepalived in a master/backup configuration, used as a load balancer for several virtual IPs. Currently the Keepalived configuration has a separate vrrp_instance for each VIP. Each ...
0
votes
0answers
19 views

Multiple IP failover on VPN PPTP

I have a server at SoYouStart, I ordered an IP failover. I want to setup a PPTP VPN so I could be able to have one connection to the "normal" IP and one to the failover IP I couldn't manage to do ...
0
votes
0answers
39 views

Load balance two ADSL connections Centos 7

I have centos 7 server working as a gateway for my network with three LAN cards and two internet connections from different ISPs , i want to combine the two connections and balance the network load ...
0
votes
0answers
15 views

How do I redirect connections to a local mailserver in fail case to a online mailserver (with dns?)

Situation: I administrate a small business network (10 employees) with a bad internet connection (satellite, limited traffic volume, weather-dependent), so some services like mailserver are organized ...
0
votes
0answers
45 views

Redis & HAProxy - updated configuration settings?

Have gotten 2 Redis instances installed, with one being a master. That is working remarkably well and with no headaches. I'm now trying to get my HAProxy/keepalived nodes to handle some sort of ...
0
votes
0answers
43 views

TCP Balancer active/standby active/passive

I have two Servers, Server A,ServerB. running as TCP socket server. I want to a active/standby or /active/passive failover. that means: 1:Server A and Server B Running, route ALL connection to ...
1
vote
1answer
198 views

open-iscsi initiator on linux does not see the passive side of an active/passive open-e target

I have a Linux server running SLES11 SP4 which uses open-iscsi and multipathing to connect to a LUN that is presented from an Open-E DSS v7 storage cluster with active/passive failover. The Linux ...
0
votes
0answers
8 views

Add Multiple FileShares to Windows Failover Cluster

Is there a way to add multiple fileshares simultaneously or via powershell to Windows Failover Cluster on a Windows 2012 R2 server? With the user interface, this will take all day because there ...
0
votes
1answer
29 views

Azure SQL Database Failover But Use Same DNS Name

I am researching ways to make a highly available web application in Azure using the PaaS App Service and DBaaS SQL Database offerings. Standard databases include Standard Geo-Replication to ...
0
votes
0answers
27 views

Windows network teaming failover email notification

I'm wondering if it's possible to configure Windows Server network adapter teaming to send alert email to administrators in case of failover. Does this function exists builtin ? Or do we need any ...
0
votes
2answers
78 views

window server 2012 r2 clustering - shared storage required or not

I just came to know that we can setup a 2 node window failover cluster without using shared storage (SAN) In that case, how does services running on 1 node failover to another when their data is not ...
0
votes
0answers
22 views

MySQL Cluster: Too Many Connections

We have our java application directly connected to the MySQL cluster (NDB engine) with 1 SQL Node. We also have another SQL node. We had a requirement to load balance our 2 SQL Nodes with the physical ...
1
vote
0answers
20 views

Performance concern with hosting large clustered DBs on VPS cloud servers

I wonder if anybody else bumped into this issue? You get a couple of beefy 12-core VPS instances in some cloud like DigitalOcean and set up a database on them in "active-passive" cluster ...
0
votes
0answers
19 views

How to failover to another ovpn configuration?

The OpenVPN documentation gives information about failover/loadbalancing over several servers, within one configuration file. Is there a way to failover to another .ovpn configuration? I have the ...
1
vote
1answer
41 views

Enable HTTPS with CNAME Apache

I have two apache servers, both of which hostnames are primary.domain.com and secondary.domain.com The Primary server will rsync and mirror all files to Secondary server as a backup. I am trying to ...
1
vote
2answers
178 views

How does High Availability work? [closed]

I don't understand how to setup a failover for my quite simple scenario. I am building a service gateway for API. What I want to have is two servers hosted in different datacenters. And I simply want ...
0
votes
1answer
26 views

time based (scheduled) haproxy backend backup setting

I have 2 web servers: A and B with haproxy before them. I'd like to use A as a master and B as a backup/failover server. I'd like to know whether it is possible to have: no automatic switch to B in ...
0
votes
0answers
29 views

failover from Oracle VM to Azure

Can I do a failover from Oracle OVM to Azure and then fallback to Oracle VM i.e. to Oracle Hypervisor environment? Does Azure support this at this point of time?
0
votes
0answers
71 views

How does the Azure Web Apps architecture look like?

I've had a few outages of 10 to 15 minutes, because apparently Microsoft had a 'blip' on their storages. They told me that it is because of a shared file system between the instances (making it a ...
-1
votes
1answer
33 views

Need some clarification on a NIC functionality on a Dell Poweredge r610

Quick question. I'm trying to understand the NIC functionality of this server. NIC specs from manual: My question is, do the two broadcom controller chips provide fail-over redundancy? For example, ...
5
votes
2answers
345 views

nginx use proxy cache if backend is down

I need to nginx proxy use cache if backend server down: this is my configuration. but seems be nginx use cache without check backend server. http { # ... proxy_set_header Host $host; ...
3
votes
3answers
281 views

How to recover from switch failure? [closed]

Suppose there is only one switch within a system and it is connected to a bunch of machines to form a network. If this switch goes down, the entire network goes down. Chances of this happening are ...
0
votes
1answer
700 views

Could not get domain controller name from machine

While validating a Failover Cluster over two member servers I get the following two errors: Connectivity to a writable domain controller from node SQL2.domain.com could not be determined because of ...
0
votes
0answers
36 views

how to assign failover ip into windows vm (ubuntu, kvm)

I purchased a dedicate server (Ubuntu 14.04 LTS amd64) with a failover ip from online.net. And i want to setup a windows vm with failover ip using kvm. I tried myself several times, but all failed. ...
0
votes
1answer
20 views

SQL Server: One Production server be Failover for other

I'm surely using the wrong terminology, but I have the following: SQL Server A (SAN1) - DB1, DB2, DB3 SQL Server B (SAN2) - DB4, DB5, DB6 It's currently SQL 2008 and we're looking to move to SQL ...
1
vote
1answer
132 views

Install DHCP failover on domain controllers vs member servers?

What is the recommendation for installing DHCP failover; domain controllers or member servers? I can't seem to find any recommendations either way. I did find an old question here pertaining to ...
1
vote
2answers
31 views

Creating a failover cluster of 2 VMs

I'm trying to create a cluster of 2 VMs on hyper v. The 2 VMs and the host server all running on win 2008 r2. When attempting to test validation for the failover cluster I'm getting an error of "disk ...
3
votes
0answers
173 views

How to Reduce Failover Interval in HAProxy?

I have setup HAProxy and it is working fine. I observed that when one of the node goes down HAProxy detects that immediately, but switch-over / redirect existing traffic to the rest of working nodes ...
0
votes
2answers
41 views

Implement an IP on Debian to redirect & failover on 2 external IPs

Hello network & sys gurus, I would like to use one Debian server inside a cluster to host a IP 1 redirecting to IP 2, or if IP 2 is not reachable, redirecting to IP 3. IP 2 and IP 3 are hosted ...
0
votes
0answers
49 views

NGINX Reverse Proxy Cache

I'm trying to create a website failover solution utilizing NGINX as a caching reverse proxy. The reverse proxy is the main A record. I'd like it to constantly serve cache, and display stale cache in ...
-1
votes
2answers
161 views

VM migration and IP address

When a VM offering a service is migrated to a different server is it an important requirement from the client applications point of view to retain the same IP the VM had before ? For long lived TCP ...
0
votes
2answers
64 views

Confused about windows failover cluster, DC and SQL AlwaysOn

I'm setting up a AlwaysOn group for a SQL Server 2014 database. However, as this is my first time I have a lot of questions and as I proceed to solve one issue, another arises and this seems to go ...
0
votes
0answers
20 views

Cisco 1921 ISR K9 with Cisco 2620xm failover

I have a Cisco 1921 ISR and a Cisco 2600 Router (2620xm). The C1921 is the primary router on the corporate network. I would like the Cisco 2600 to connect to a module on the C1921 and provide 2 ...
0
votes
0answers
133 views

Windows Failover Cluster Generic Script

I have two windows server 2012 R2 machines set-up in a cluster. Everything seems fine with regular services but when I try to create a generic script resource I encounter the following vague error: ...
0
votes
0answers
153 views

DNS load balancing with multiple IPs on the same domain in GoDaddy

Looking for a cheaper solution than amazon CloudFront, I placed two "A" records with different IPs to different servers on the same subdomain in a NameSever managed by GoDaddy in order to achieve some ...
0
votes
1answer
70 views

2 Node Failover Cluster

I need to build a 2 node Hyper-V failover cluster, that's dead simple right? The problem is that the hardware is already bought. Both servers are identical and approved. Related spec: 250GB Drive ...
3
votes
2answers
124 views

Why should we purchase a dedicated load balancer when the firewall can do it?

I've got 2 servers, let's call them 'node1' and 'node2' installed at a data centre. They run our application software. They are interchangeable, and each have a full copy of all customers' databases. ...
1
vote
1answer
36 views

Failing over to mirror instance when not using a witness server

I have a set up where I have two SQL servers set up for failover mirroring to two other SQL servers. I am not using a witness server. I had previously used a witness server and that of course would ...
0
votes
3answers
189 views

Web Server failover solution [closed]

Sorry for a dumb question but I`m a green hand yet. I have two Linux server: one of it is running Apache with MySQL to serve my web-platform (master server) another one is supposed to be a sort of ...
0
votes
2answers
67 views

Secondary AD DC With Fail over

Situation: I have a AD DC authenticating all the users now and serve as the DNS as well. Problem: After reading through this, I am wondering how do I set up another AD DC and configure the site and ...
0
votes
1answer
94 views

Debian Heartbeat IP Configuration

I need to setup a heartbeat with pacemaker based on debian OS where the active server virtual IP is 192.168.1.10 and the passive server virtual IP is 192.168.1.11. Both of the server is connected to a ...
3
votes
2answers
530 views

How to create a high-availability application server?

I am working with some hardware units which uses mobile Internet to communicate to my application server. Initially, the hardware had a hard-coded IP address (load balancer) in the hardware for ...
0
votes
1answer
29 views

SNAT& iptables in Centos

i have a remote server where I have added a new FAILOVER IP in a new interface, ETH0:0. Everything works perfectly; IP is setup. I want the traffic that is coming from ETH0:0 to use the ETH0:0 as the ...
0
votes
1answer
91 views

What happens to read/write operations during automatic client failover in MongoDB Replication

We have setup a 3 node replication set configuration for MongoDB. I want to know what happens to read/write operations during primary switchover. To be more explicit, few read/write operations were ...
0
votes
1answer
17 views

Bridge Mode with fail open

I have a GNU/Linux server running an HTTP reverse proxy (Nginx). The upstream server is well-know (IP address on a subnet). What I would like to "guarantee" is that in case reverse proxy goes down, ...
3
votes
1answer
89 views

Error configuring witness server for failover in SQL Server

I'm lost here, I am configuring a SQL Server for failover and have three servers. Principal server > SQL 2008 R2 Witness server > SQL 2014 Mirror server > SQL 2008 R2 All three servers can ping the ...
0
votes
1answer
51 views

Looking for Failover Cluster for Scientific Linux and nginx [closed]

here is what I'm trying: two instances of SL7.1 with nginx as reverseproxy no shared filesystem shared resources: virtual IP running nginx service I already tried keepalived and corosync + ...
1
vote
0answers
34 views

Hyper-V - Upgrading a 3 node 2008R2 cluster to 2012R2

I'm just after a some advice/tips on upgrading our 3 node Hyper-V cluster from 2008R2 to 2012R2. I have 3 x Dell r710s running Server 2008R2DC. These are clustered and running about 15 VMs (5 on each ...