Looking For Redundant Setup, Round Robin?

Nov 5, 2008

Looking for redundant setup, round robin?

I'm looking to make high availability setup, and wondering how many of you have made it so?
we are looking to multi-home the page with a round robin setup, using multiple VPSs/dedicated servers geographically different locations.

Right now i'm still looking at "stale" DNS setup, no automanagement of servers down. Is there a service/software which already offers automatic changes of zones for removing servers which are down, and adding them back when they get back online?

Do i need to custom tailor everything?

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Round Robin With Iptables

Nov 13, 2005

iptables -t nat -A POSTROUTING -o eth0 -j SNAT -p tcp --dport 80 --to-source 1.2.3.4-1.2.3.6

If I'm understanding the iptables man correctly this rule should round-robin outgoing http requests over the IP range, instead it's sticking to the first IP no matter how many connections I make.

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SSL Certificate And Round Robin

Sep 22, 2007

We have a few IIS servers that will be acting as front end for our users to split off the load.
Currently, we have one IIS with 1 SSL. we are going to do round robining for the FQDN to span a few IIS servers. I just wanted to make sure we would not run into any issues with the certificate. I was thinking of installing it on one server after generating the CSR and then once the root trusted is in place, export it and import it in all the other servers. Do you think this would be an issue at all? is there a better way?

additionally, the certificate is about to expire, I need a certificate with $1mil insurance, what do you think is the best deal (trusted source) going around? should I do the ones with 256bit too or have you seen any conflicts, do they auto negotiate if the client can only support 128bit?

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Round Robin And UserDirs

Dec 7, 2008

Round-robin and UserDirs

I just setup a round-robin so that my website is always available even if one of the 2 servers goes down. It works like it should, however, i can't access the userdirs from server2. The userdirs are located on server1.

It's setup like this:

www1.domain.org is server1
www2.domain.org is server2www.domain.org is the round-robin. I have 2 WWW's pointed with an A record to each of the server's IP addresses.

On server 1 i have 2 userdirs which are accessible through www1.domain.org/~user . They should also be reachable on www2, because if they are not, they wont be accessible half the time due to the round robin.

I therefore added a .htaccess in www2's root document directory with the following info:

Redirect /~user1/ http://www1.domain.org/~user1/
Redirect /~user2/ http://www1.domain.org/~user2/

So when i go to www2.domain.org/~user1/, i should be automatically be transferred to server1... but all i get is a 404 error page. It works perfectly when accessed on www1. I don't see what i'm doing wrong. I thought it might be the userDir setting in apache that might be causing trouble.. but that is turned off on server2, so that should not be the problem. Anyone here have any idea how to access the user dirs via server2?

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Round-Robin Domain Name Server Failover

Jul 13, 2007

I am trying to do a fail over solution with round robin dns. Our dns is served by windows and our web servers are setup with Linux..

I know round-robin does not by default do a fail over, however my understanding is that a script can be used to remove the failed server for dns, is anyone aware of something that will do this for windows?

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Redundant Router Setup

Jun 5, 2007

I'm in the process to setup a new service with an ISP with the following scenario and need your help.

I've got the rack (42U), servers and switches. Only routers has been left and here is that I need your help.

I have also 2 ports from the ISP where I can connect my routers. I need to get 2 router devices with auto sync feature in order to be able to setup a redundant plan in case that one of them goes down.

Those routers should have firewall features too in order to avoid setup iptables rules for each server. A basic DDoS protection is needed too.

I'm going to push around 100Mbit of traffic across the servers but that will happen after 3-4 months from the initial setup. In the first instance no more than 10-20Mbit will be used.

I heard a lot about Cisco but got no idea what model is the most suitable for my case. I will probably need a module for DDoS attacks and another one for advanced security IOS from what I read but it is not clear to me.

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How To Setup A Redundant Server For A Domain Name To Reduce Downtimes

Oct 29, 2008

I have registered a domain using godaddy. I have hosted my site on a server of my shared hosting provider(lets call them X).Currently I have pointed mydomain.com to the server and it is up and running.Sometimes, I have experienced downtimes.

In order to solve this problem, I have hosted a clone of my site on another server from another hosting company(lets call them Y).

1. I want mydomain.com to point to Y when X is down

2. again point it to X when it is up.

My main aim is to have my site live with less downtime. The probability having both servers down is very less.

I dont know if it is technically feasible, just a thought out of dirty mind. I tried to google but was not able to find an answer specific to my problem.

Can anybody tell me how to achieve this through godaddy domain.

Added note, My site is not a commercial site and I cant afford large dedicated servers with clustering and failovers.

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Global Colo - Round 2

Nov 29, 2007

It seems the more places we can put servers, the more places boss-man wants them

We're setting up an external network to test back into our network from geographically/carrier diverse locations. We've got about 15 hosts up, but most are in the states, one in london, one in amsterdam, one in frankfurt and one in hong kong.

The current wish list of locations includes -

- Japan
- S. Korea
- Australia (holy cow bw is expensive in sydney! is anyone charging less than $500 per Mb?)
- Paris, France (we have one quote in, but it is pretty pricy)
- Italy
- Spain
- Sweden

I'm doing research and have submitted rfq's to companies in most of these locations, but was hoping for personal recommendations of hosts you have used.

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Email Round Trip Monitoring

May 19, 2008

Does anyone know any tools or scripts that you can run to do email round trip monitoring (eg, sending and ensuring itís received within x minutes)?

Not looking for a solution that is hosted (eg, websitepulse.com) but for something that can be run off a machine locally.

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Plesk 12.x / Linux :: Unable To Login To Round Cube With Any Email Account

Dec 18, 2014

We was unable to log in into Round cube with any email account. URL....

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Redundant DNS

Oct 6, 2009

I have been working on and designing a hosting company. Now setting up my names servers has came to a question. When I ran a previous business with a partner he only use Name Servers on 1 Machine in 1 location.

Now my question is my first server is going to be located in New Jersey, USA . So that is where My first set of DNS starts. With my previous partner I noticed most of the customers were based in Europe, Philippines, etc. Over seas. Now What I am asking is Will a VPS in a different location work for DNS Server. That way I can keep a lower budget till we get a few customers under out belt.

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Redundant DNS Servers? How Do You Set Them Up

Apr 8, 2009

Because of the attack on theplanet yesterday, my sites were down.

People are mentioning adding "redundant DNS servers" to protect against downtime in future attacks.. but I haven't found any info on how to set these up.

I also seen somebody post that the planet doesn't allow "zone transfers" so I'm a bit confused at how to proceed.

I just registered an account at [url] and I'm unsure on where to begin. Their FAQ is just a large photo.

My .com is registered at Godaddy. Do I edit records at godaddy to point to the server IP? Or do I have to edit records via WHM?

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Redundant Hosting ....

Aug 13, 2009

I currently run spiderloop.com a SEO control panel designed for windows hosting accounts. The site and web service is hosted on our own server and works great, however I am concerned about redundancy and do not want to purchase a whole other server just to be fail safe. So I am going to purchase a shared hosting account to facilitate redundancy.

So here is the question.

How do I do it? How do I set up my current host to redirect to the new host when it goes down?

If the current host has problems how can I force the users browser to redirect to the redundant host? I simply don't understand.

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Is My Host Redundant

May 28, 2008

I have a renewal bill for my hosting account, but I can't see if I have any domains in it and therefore not sure if I should cancel it or not. I am with bright-byte.

Can I do a domain tools reverse search or something on the domain so it can tell me which of my domains are with that host?

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Mar 18, 2007

I've decided to move from managed hosting to colocated hosting and I'm in a bit over my head as far designing the server configuration goes. I'm looking for assistance with setting up a fully redundant configuration with no SPOF (single point of failure).

The colo provider ensures full redundancy to the cabinet, terminating with two network drops from diverse bandwidth providers and HSRP. I need to eliminate all SPOFs inside the cabinet.

Some questions...

1) I'm thinking of using the Cisco 2960 Series switch as the in-cabinet distribution switch. I believe it supports HSRP. From my understanding, the switch will automatically failover from one uplink to the other in case of a network problem on one of the uplinks, and this will all be transparent to any servers connected to the switch. Is this correct?

2) However, this introduces the switch as SPOF. So, I believe what I need to do is ask the colo for a second pair of network drops and deploy a pair of 2960's. Then I would connect each server to both switches via separate NICs. Is this correct?

3) Finally, assuming I am on the right track here, I would like this to all be transparent and automatic with no human intervention required to recover from a switch failure. The servers will be running RHEL 4. How would I configure the network interfaces on the servers so that they can transparently use either (or both) of the switches? Is there some way to assign the same IP address to more than one interface? How does the OS keep from getting confused about where to send the traffic?

Thanks in advance for any insight. I would also be happy to hear recommendations for excellent network consultants that I could hire to design and implement this configuration for me.

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Redundant Server

Sep 15, 2007

I have two servers. One hosts about 55 small sites and the other does nothing.

Can I make use of the spare one to take over automatically if the main server fails for whatever reason?

I had been thinking of using Rsync to backup accounts / mail every 6 hours or so and then manually changing the nameservers on the domains in the event of server1 failing. Would that even work? Then I got thinking about it all being automatic.

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Redundant VPS Solution

Apr 14, 2007

I have a few VPS's, the main one has cPanel/WHM and runs all my sites / email / DNS and MySQL DB's. Heres a little info:

VPS1 - CentOS 4.4, cPanel/WHM, runs all domains (OpenVZ)
VPS2 - CentOS 4.4, Webmin, Slave DNS to VPS1 using Webmin cluster (OpenVZ)
VPS3 - CentOS 4.4, Webmin, Slave DNS to VPS1 using Webmin cluster (Xen)

However, if VPS1 fails for say 24 hours, im screwed!

So, my question is can I get some kind of redunadancy built in somewhere. For example if someone is trying to access my domain "mydomain.com" and the main VPS is down, then the request for the site would go to VPS2, or VPS3...

The same for the mail server, if some is sending mail to one of the domains on the VPS, and the main VPS was down, the mail would be sent to my other VPS's.

I just don not like the fact there is a single point of failure!

I do have WHM managed Weekly and Monthly backups of all cPanel accounts etc.

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Jun 11, 2009

We are a hosting company in Colombia, and we want start selling corporate email service.

The main idea is have two servers with redundance, I think this servers have to share the filesystem I don't know if using a scsi disk or just a network file system. We also want to have a good appliance for stop the SPAM, Im not so sure if we need to have redundance on it, its ideal but we are just starting the bussines and we dosn't have cliets yet.

Can anyone share their setup with us, and give us recomendations or tips?

Another option is, if someone know how to do that and have implemented this setup before and want to work $$ with us to implement that, please contact me to jbravo[at]colombiahosting.com.co

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Aug 29, 2007

to setup a Windows server that can support the failure of the switch that comes before it in the network diagram. The idea would be that if the 15A circuit the switch was on failed, or the switch just died, the server would still be online.

I already have two switches in spanning tree just before the server. Is there a way to assign a single IP to the server on both its network cards and connect each card to a different (spanning tree'd) switch?

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Jul 30, 2007

I'm upgrading my server again and now that we have 8 disks we need to upgrade our power supply (I was told).

But do I really need a redundant power supply Or can I just buy ONE 650 watt to upgrade?

These are my current server specs:

Quote:

2 X AMD opteron 270 dual core
2 X 2 GB kingston PC3200 DDR ram
2 X 1 GB kingston PC3200 DDR ram
(6 GB total)
8 X seagate cheetah 15k.5 SCSI 73.4 GB, U320, SCA in raid 10
1 X LSI megaraid 320-2x raid controller, dual channel
1 X Tyan thunder 8KSE (s2892) mobo
1 X 2 * 4 port chenbro scsi backplane (8 ports total)
2 X AMD CPU cooler
2 X 40X40X10 fans
(Currently 1 X zippy P2G-6510P, 2U, single power supply, 510 Watt)
1 X Sony FDD 1.44"
1 X chenbro RM311, 3U case with 8 hot swap bays
1 X LG DVD/CD-rom burner

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Jan 10, 2008

I have a DB server, running mysql 64bit. I would like to add another server to the mix to build some kind of redundancy if the 1st one were to go down.

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Sep 22, 2009

I currently own several servers: let's say sites on 3 of those servers rely on a website that sits on server 4

If server 4 goes offline, then servers 1 2 and 3 suffer a lack of usability.
The website on server 4 is very small and fast, but receives several hundred thousand visits a day

I figured it would be a good idea to replicate that website on each of my servers, but I'm unsure about how to set up a good redundancy system..

Using several nameservers doesn't work as expected (visitors are randomly sent to one of the nameservers, in no particular order)

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Oct 18, 2009

So the rule of thumb is if you have a 30A circuit to not exceed 80% or 24A.

If I buy a 30A circuit, I am assuming it is protected by a circuit breaker that is 30A, correct?

In *theory* we could run 29-30A all day and be fine.

So, I understand, the rule of 80% to be to the effect that "during startup, equipment uses more power ... or during runtime if it heats up, the fans go faster using more power" so it is safe to be at 24A in case you get spikes to 27-29A.

Is my reasoning correct?

Further, if you run primary/redundant circuits, is there really harm in running 13A on one circuit and 14A on the other.. and in the unlikely event of a failure, you are running 27A on one circuit (at 90% instead of 80%).

Any thoughts on this? Getting an extra 3A out of a 208V circuits is like putting in 3-4 more servers. If someone is doing this please let me know. I think it would work fine but i would like to know from the experts that do the colo stuff for a living what problems i could encounter, if any.

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Sep 29, 2009

Who are the reputed hosts in the market that comes with "Lightspeed Host with Redundant Servers"?

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Apr 15, 2008

We have 2 linux servers with plesk. We want Redundant Dns and backup mail servers for our hosting domains. We already setup Primary nameserver ip address is first server, Sec Nameserver ip address is second Server. like

ns.ourdomain.com - first server ip address
ns1.ourdomain.com - Second server IP Address

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Jul 7, 2009

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For MySQL, I believe replication can do the job unless anybody has better recommendation. What would you guys suggest for web files? Can I use different Linux flavor but maintain back the same LAMP version?

Is there any "online" 3rd party load balancing service that I could use to load balance the traffic to both servers?

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Is the only solution to use only one of the two power supplies in the Dell 1750...?

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What I'm looking for:

- linux hosting
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- at least 6 IP addresses for SSL certs
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Aug 1, 2008

I have learnt it is harder to setup than I initially expected (since I have just moved from a shared hosting service). I am in need of some help setting up my DNS servers, as I am very confused. Here is most of the info I know:

1) I am running HyperVM

2) I've installed LXAdmin

3) I own the domain (purchased from xeodomains.com) runemart.com

4) My VPS hostname is: vps.runemart.com

5) I know my IP

6) My host has said:

'For VPS customers that have a HyperVM login you can now host forward DNS on the DNS servers rdns1.vaserv.com (US)rdns2.vaserv.com (UK'

And I am unsure what this means/how to do it.

I am not sure if I need some more information to set up my DNS, however I am sure that I can get it if I do.

Now, my questions begin. Firstly, I need to point my domain - runemart.com - somewhere. I believe I need to set up my DNS via HyperVM or LXAdmin so that they are something like: ns1.runemart.com and ns2.runemart.com. Though, is this correct? Am I able to set up my own actual domain name servers, or will my domain have to point at something like rdns2.vaserv.com?

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