The failover tag has no wiki summary.
6
votes
2answers
98 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 ...
0
votes
1answer
23 views
redirect to a static page on another web server when main web server is down
We have a single IIS web server in house that when it goes down we would like to redirect traffic to another web server and display a message that the web site is down. I have been all over the net ...
3
votes
1answer
151 views
+50
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
38 views
Advanced SQL Setup
Got a major issue that I need some help with. Here is the situation.
The client has multiple web sites hosted on multiple web servers (virtual machines) running on multiple virtual hosts that ...
0
votes
0answers
32 views
Do I need an SQL Server 2012 / Windows Server 2012 Upgrade Insurance? [closed]
We are a small SaaS company that has until recently participated in Microsoft's Bizspark program. Now that our Bizspark subscription is over, we have a time-limited oppurtunity to buy discounted ...
0
votes
2answers
35 views
Howto switch ISP provider? [closed]
Possible Duplicate:
Office network failover?
I have a office LAN providing internet access to several workstations, each workstation it is basically connected to the hub that it is ...
-2
votes
0answers
36 views
VPN failover when DNS hijacked using DD WRT [closed]
I live and work in China, but I maintain an Internet connection in the United States. The reason is obvious: China blocks Facebook, Twitter, etc. using DNS hijacking. I have a Windows 7 machine ...
1
vote
2answers
109 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 ...
2
votes
1answer
118 views
DNS Failover when Datacenter is dead
I'm just trying to configure my DNS server to switch the DNS entry in my DNS server (bind) if a server becomes unreachable. Is there a simple tool that I can use to do so?
0
votes
1answer
26 views
mysql/web server failover setup using reverse proxy
I have two webservers and at the moment have DNS - Round Robin setup so that they are somewhat 'failsafe' this was only ever a temporary failover solution and I am now looking at a more permanent and ...
1
vote
2answers
75 views
Dynamically re-route specific traffic on NIC failure in Linux
This is my first question on this forum. Hope I will be able to help others in the future.
I have two boxes with two NICs each. I know that using bonding I can have some degree of fault tolerance ...
4
votes
2answers
164 views
How good is failover of the iSCSI target on a two-node linux san?
I'm evaluating the possibility to use two off the shelf servers to build a cheap iSCSI redundant SAN. The idea is to run linux, pacemaker, and an iSCSI target - something like the SAN Active-Passive ...
1
vote
1answer
60 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 ...
2
votes
1answer
128 views
Heartbeat Pacemaker 3 node/ip failover
I have setup two node active/active ip failover with heartbeat and pacemaker following the link at zivtech on the two load balancers for the backend web servers. Two LBs has public ip each which is ...
1
vote
4answers
192 views
DNS Round Robin: Do browsers stick to one IP as long as it is online?
How do most browsers behave if they get multiple A-records from the DNS server? Do the stick to one IP as long as it is reachable (and only use another if the IP is down)? Or do they switch all the ...
3
votes
3answers
116 views
Two server with same data in case one goes down
I actually own two linux web servers and I was wondering how I could make them work together in case one goes down.
From what I found, cluster seems to be the closest, because it would replicate the ...
0
votes
1answer
48 views
How to approach high availability and fail-overs when moving to a vmWare cloud server/cluster
I'm currently running a CentOS VPS with some simple web/DB/VPN servers, but I'm planning to move to a vmWare Enterprise cloud based machine in the near future to improve availability, and I need to ...
1
vote
1answer
66 views
Heartbeat ip failover on Ubuntu
I have 3 servers, 1 as load balancer and 2 as web-servers(apache tomcat) hosting some jsp pages. I want to add one more load balancer in active/passive mode to avoid SPOF and below is the expected ...
1
vote
3answers
213 views
How to configure ubuntu server with 2 NICs, and 2 Gateways (2nd as a failover)?
Here is a basic overview of the network configuration for one of our servers:
[Datacenter]
[Internet Connection #1] >> [Firewall 1 (xx.xx.xx.1)] >> [Server (xx.xx.xx.10)]
...
1
vote
1answer
91 views
Tomcat mod_jk cluster skip 404 http status
I am trying Tomcat Clustering with mod_jk for months and so far not so bad but facing a problem during deployment. I am using FarmDeployer to copy and deploy the WAR to other nodes in the cluster but ...
2
votes
1answer
74 views
Adding the IP Failover on FreeBSD
I've just bought a dedicated server in OVH.com and they are sending me some warnings in email that I haven't configured my IP Failover address correctly and they're going to block this failover within ...
0
votes
0answers
71 views
corosync not promoting drbd to primary (sometimes)
I have two nodes (both as guest on different Xen Dom0)
- it's nfs on virtual ip on top of DRBD device (no STONITH configured)
in CRM - order, colocation and group configured
When I stop corosync ...
0
votes
2answers
89 views
Will traffic get through a standby firewall if the active firewall's interface to the gateway goes down?
Here is the scenario. I have two ASA 5510's in Active/Standby. Each of them has a single uplink to one of two routers (HSRP1 and HSRP2) configured in HSRP. Disaster strikes and the interface ...
2
votes
1answer
73 views
Cisco ASA force failover from command line
I have 2 independent traffic routes to my servers. They are serviced by a failover Cisco ASA5505 pair. However, should my gigabit switch on the main route fail (or main internet feed), the ASA will ...
0
votes
1answer
51 views
Cisco IP SLA monitor failure on tcpConnect but the host can be telneted from router
I want to configure a failover link to my cache server with Cisco policy routing.
So I attempted to create an ip sla monitor. here is the syntax in the cisco router (there is possibility of being ...
0
votes
1answer
52 views
How to adjust ASA Failover Times?
I want to adjust my failover poll timing.
The proposed column is what I am wanting to set it up as.
I believe the following commands will obtain what I want from the first two rows but Im not sure ...
0
votes
2answers
76 views
heartbeat: find out machine's status within a cluster?
I'm trying to do some heartbeat debugging.
Is there a simple way to ask a machine whether it thinks it's part of a cluster, and whether it's the master or the slave?
I've tried
$ heartbeat -s
...
2
votes
1answer
100 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 ...
0
votes
1answer
118 views
Heartbeat (without ldirectord etc) for a floating IP address?
I have two load-balancing servers running mod_proxy_balancer. Each server balances between two web servers.
Now I'd like to find a way to share a single IP address between those two load-balancing ...
0
votes
2answers
119 views
keepalived questions (requirements, abilities, limitations)
1) What are keepalived's (physical/network) requirements? Does the two (or more) keepalived' nodes need to be connected to the same switch? (something related to broadcasting maybe).
2) Can ...
1
vote
1answer
42 views
Windows Server 2008 R2, IP Failover with 1 server and 2 isp's
I have a Windows Server machine that I have 2 nic's that are connected to 2 different isp's. Our DNS is hosted externally. What I am trying to do is set it up where when one isp goes down the 2nd isp ...
1
vote
2answers
126 views
SSD redundancy via HDD
Is there a way to guarantee redundancy to an SSD using an HDD?
Raid 1 is the best choice to guarantee redundancy in HDDs, but SSDs are too expensive to guarantee redundancy via RAID. If I was to ...
-1
votes
1answer
59 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
2answers
43 views
port check - forward and fail over
I am looking for simple fail-over solution. If the 92 server is down, the application should point to 91 server. I can check the connectivity by scripting the following commands.
[root@sserver ...
1
vote
0answers
106 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 ...
-2
votes
2answers
205 views
How browsers handle multiple IPs
Can someone direct me to information on exact browsers behavior when browser gets multiple A records for a given hostname (say ip1 and ip2), and one of them is not accessible.
I interested in EXACT ...
1
vote
3answers
101 views
Can DNS do failover switch for a domain?
I have heard about round robin solution. But that one is making different request to different ips to do load balancing. What I want is making one IP as master, only if it dies, the DNS server switch ...
0
votes
2answers
103 views
WAN Link Balancing - Best Way To Approach
First some of the details. We are a SME (80 office users 30 remote) with 2, soon to be 3 WAN connections. Our WAN connections are a T1, Cable (25/5), and soon to be DSL (10,2). We are looking to to ...
1
vote
1answer
89 views
How to make iptables ALLOW rule for multicast?
I have two servers that uses ucarp as failover. On each server eth1:1 is reserved for ucarp's keepalive connection.
ucarp uses the destination IP as multicast address 224.0.0.18.
On ucarp master ...
0
votes
1answer
75 views
Solid failover for IIS and ASP.NET MVC?
Our team is currently planning our next big project which looks to be an exciting one!
We our product will be an ASP.NET MVC site which can either be deployed on a customers own server or they can ...
0
votes
1answer
64 views
Can the NIC ucarp uses be bridged?
I have setup ucarp failover using this howto, and it works great.
# /etc/network/interfaces
auto eth0
iface eth0 inet static
address 10.200.0.102
netmask 255.255.255.0
...
0
votes
2answers
91 views
Virtual IP failover on windows 7
i would like to find out how to set up virtual IP failover on windows 7. There are many online guides on linux heartbeat and pacemaker but i need configuration guides on how to set up virtual IP ...
0
votes
2answers
172 views
haproxy failover with process monitoring?
I know some people are using keepalived and heartbeat for active/standby but what action is taken if the haproxy process were to die?
What would be nice is if the virtual IP would switch servers if ...
0
votes
0answers
63 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 ...
1
vote
1answer
63 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 ...
1
vote
1answer
100 views
What is needed to use TFTP/PXE with failover ucarp?
I have a Linux TFTP/PXE server which works.
If I setup failover on 192.168.245.1 which is where TFTP is being served, the client fails with tftp open timeout.
I am testing with
tftp 192.168.245.1
...
0
votes
1answer
52 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
2answers
72 views
SMTP/IMAP failover, filesystem options?
Given two hosts running SMTP and IMAP services, how would you best make them redundant so that one can easily take over if the other goes down?
Keep in mind there are no other servers where network ...
2
votes
2answers
124 views
ASA Active/Standby Failover: Is a standby by IP address needed on inside/outside interfaces?
It would seem that only a standby address that would be needed is for the "failover" interface. This is given with the following command for example:
failover interface ip failover_link 10.99.99.253 ...
2
votes
2answers
70 views
Can BOOTP in DHCP failover to a second IP?
I have a Linux PXE server, and would like to have failover, so in case the primary PXE server is down the secondary PXE server can take over.
The DHCP server is a Windows 2003 R1.
Could failover ...
