Multiple Server/Cluster Design, Setup And Maintence
Mar 13, 2008
I work in a DC and am looking for a better way to deal with clients who have multiple servers hosted with us.
Heres the scenario. Client buys a server or two at the beginning, with a HW firewall or they are clustered together and require their own switch and down the road, they like what we do and want to buy more servers.
However, we've been selling other servers and the only way we would be able to accommodate them would be to run a cross connect to another cab with their new server in it. Hopefully you can see where I am going with this.
This can keep happening multiple times and with multiple clients. and eventually you can end up with spider web of cable everywhere .
My thought of doing it right but more work would be to schedule down time with a client and migrate all the HW to a new cabinet where they can grow.
Weve also been tossing around ideas like getting projected growth from clients and setting aside space for them to having dedicated cluster cabinets.
how do other DCs handle situations like this?
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Feb 23, 2008
I have started to move my websites over to my UK Colocation But would like a little guidence on what the best solution would be.
I would like to build up a Server Cluster that will handle all of my sites really and also have redundancy, so If 1 server goes down the other Web/SQL/Whatever server will be used instead.
I have websites ranging from large forums to streaming & download websites.
Should I got for a setup for example:
X Web Servers + X Database Servers
Connected to X Storage (see link below)
Connecting the Web Servers in something like a a round robin config or use a Load Balancer / Other
OR Should I setup multiple:
Web Server + Database Server + Media Server
OR another config?
Below are my current setups
Current UK Setup (Colocation)
Web Server
Quad Core, 8GB Ram, 250gb HDD Raid 1
Quad Core, 8GB Ram, 250gb HDD Raid 1 (just ordered)
SQL Server
Quad Core, 4GB Ram, 250gb HDD Raid 10
Storage Server
HP StorageWorks NAS 1200s 1TB (just Ordered)
Link: [url]
Current US Setup (Dedicated Servers)
Web Server
Quad Core x2, 8GB Ram, 3TB HDD
SQL Server
Quad Core x2, 8GB Ram, 1TB HDD
Media Server
Quad Core x2, 8GB Ram, 3TB HDD
Dual Core, 4GB Ram, 3TB HDD
Backup Server
Dual Core, 2GB Ram, 1TB HDD
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Nov 7, 2009
i have ideas about clustering server with spread country/datacenter.
example: i have 5 Server spread around the world, server 1 in US, server 2 in German, and other country for next server.
server 1 will be main server, when server 1 down, it will goes to server 2, and continue to the next server.
all site/file and other stuff will be mirror on all server.
so it will be 100% Uptime!, and never LOSS anything!.
and my question is how to do that, maybe someone expert want to share with me.
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Jul 7, 2009
Hi there, i have few question for the best suited DNS Setup for our compagny.
We have tree server located in montreal.
Two are running web services, one of them is only for dns ( home server ).
Two main server have Whm/Cpanel.
One run Cpanel Dns only.
Main server have 7 ips each
Dns server, only have 1
Let say we use domain xxx.com
Right now we have ns1/ns2/ns3/ns4 point to server1
ns5/ns6/ns7 point to server2
We have no Nameserver that point to our dns only server for now.
I'd like to advoid runing DNS Service on all of them, maybe having two slave one master would be fine. Question: What would be the best suited dns setup with my current config for best responding time and fast replication?
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Dec 20, 2007
First the run down...
I work for an ISP providing service to several thousand customers...
We are now taking on multi-millions of emails everyday (sometimes over a billion) (we purchased a couple of smaller ISPs and moved them to our mailserver)
Since the move from their old servers to the new... our uptime on our pop3/smtp server ran about 11... we had to institute a mail filtering server... it was getting around 2500 concurrent connections to the server and running an even higher uptime, and delaying emails around 8 minutes per message!
Our POP3/SMTP server is Redhat 9 (I know its old, but it still runs good) (Dual Xeon 2.8 HT 2 GB RAM NO RAID)... our frontend filtering server is FreeBSD (Dual Xeon 3.06 2 GB RAM RAID5)
Needless to say our current setup cannot handle the amount of email being processed... We need to implement amavisd back into the filtering equation so that spamassassin will filter mail based on the user preferences and delivered to procmail to our POP3/SMTP server so that it has no load basically...
SO what I want to do is this (please correct anywhere im going wrong):
I want to have a main incoming mail processing server (does RBL rejects and anything left over it will pass on to another server)
But the kicker is, I want the mail processing server to do this (we will call it mx1.troubledisp.com):
Incoming Mail->mx1.troubledisp.com
mx1.troubledisp.com->mx2.troubledisp.com
(But I want 3 servers in the middle, mx2, mx3,mx4)
Basically I want one message to go to one server, one to go to another, and so on... So basically EVERY message that comes in will go to a different mx server, not just loading up 1 server until it cant process anymore....
Then after it is processed it needs to go to the original mail.troubledisp.com
So if email #1 is received it will go like this:
mx1.troubledisp.com->mx2.troubledisp.com->mail.troublesisp.com
When email #2 comes in it goes like this:
mx1.troubledisp.com->mx3.troubledisp.com->mail.troubledisp.com
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May 15, 2009
obviously a (relatively successful) shared host would have multiple servers hosting their different clients. But they'd usually have all their client's setting their domain's nameservers to just one set of DNS (i.e. ns1/2.hostsdomain.tld)
Would you set this up via a DNS cluster? I.e. on a cPanel/WHM following these sorts of instructions?
For some reason I never can fully get my head around DNSes, so apologies if I ask any silly questions thusly.
With the above in mind, say your billing system sets up a new client - say it sets them up on SERVER2 (the host's second server for hosting clients). The DNS records would automatically be synced to the name server, right? And then, when someone visits the client's website/domain (with nameservers ns1/2.hostsdomain.tld) the 'hops' would roughly go:
Client's domain >>
Host's name server >>
This 'forwards' the 'connection'/request to the client's website files on SERVER2
Is that about right? And if the name server and SERVER2 are hosted in physically different parts of the US (say), would this make each request slower since it involves hops to two different servers before the client's files are shown?
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Sep 16, 2006
I have 1 server so I setup dns as ns1.mydomain.com, ns2.mydomain.com ip address pointed to server1. So, now I just bought another server. Can I setup ns2.mydomain.com pointed to 2nd server. Also how to setup more servers ie. 10, 20 server because I can only set up to 6 dns in one domain name.
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Apr 9, 2008
We are co-located at a datacenter and host web sites, and corporate email systems, as well as host dedicated servers for customers.
We currently have two /25 internet facing subnets from our provider. We have a Watchguard X5500e 8 port gigabit firewall that supports routing as well as VLANs. We also currently own QTY4 2848 HP Gigabit switches.
We currently have each switch connected in a loop with 2 gigabit ports trunked using static LCAP. The switches are connected as follows:
A > B
B > C
C > D
D > A
Rapid STP is turned on. One thing is - is this the ideal trunking scheme?
The more important question is this. We would like to separate ips from each other using VLANing.
IE: we might have a client with 5 different IPs in one or more subnets and we would like to group them together.
We ideally do not want to break up the subnets into smaller ones as it makes it hard to reconfigure and it wastes ip addresses, as we do not have that many.
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Apr 11, 2008
I have a VPS account with WHM/Cpanel console access. I have three domains that I am trying to setup. Within WHM I have setup three different accounts, one for each domain. I am able to login to the cPanel for all three accounts. This also created a new web directory for each domain in /home/domain_name/public_html/. I have placed my default index.php in all three public_html with the same permissions. But only 1 domain is working the other two are not. What am I missing? I have confirmed that all three have the correct DNS servers with godaddy and I can do an nslookup on all three. My provider told me to share the IP so that is what I am configured as..
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Sep 21, 2007
some setup recommendations as I feel I have outgrown my current server.
I have two websites:
#1 is a busy vBulletin based forum with 42,000 members.
#2 is a website with Wordpress and Vbulletin installed (though the forum is nowhere near as busy as the first site) and gets roughly 2000 uniques a day.
When site #2 gets a good surge of visitors from offline media or a large site, site #1 will die first with the "mysql error: too many connections" error and site #2 will take a very very long time to load.
For every other day, the load is quite low, nearly always under 1.50.
The current server that both sites reside on has the following specs:
Quote:
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Pentium(R) 4 CPU 2.66GHz
stepping : 9
cpu MHz : 2667.540
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid xtpr
bogomips : 5339.18
total used free shared buffers cached
Mem: 1003 484 519 0 3 192
-/+ buffers/cache: 288 715
Swap: 2047 25 2022
What sort of setup would be best for me?
A files server and a sql server?
A server for site #1 and another for site #2?
A single, more powerful server?
Or something else you recommend?
Also, for the setup you do recommend, can you recommend a hosting company that is reliable and can do it for a good price?
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Jul 27, 2006
I´m running 4 servers on a cpanel - dns - cluster.
- 1 running cpanel (srv01)
- 3 running cpanel-dns-only (cluster01 - cluster03)
My DNS config is:
srv01 - dns1.domain.com
cluster01 - dns2.domain.com
I ´ve setup on srv01:
- cluster01 (synchronize changes)
- cluster02 (standalone)
- cluster03 (standalone)
On cluster01:
- srv01 (synchronize changes)
- cluster02 (standalone)
- cluster03 (standalone)
And on cluster02 and cluster03, I did something like that:
- srv01 (synchronize changes)
- cluster01 (synchronize changes)
- cluster03 (standalone)
And
- srv01 (synchronize changes)
- cluster01 (synchronize changes)
- cluster02 (standalone)
1. So, is that correct?
2. It seems that when I click on 'syncronize all DNS records on all the servers' only cluster01 and srv01 got all the DNS records. So is it normal?
Yet If I add a domain on cluster02 for example, where I need to add the DNS? cluster02 named.conf or on cluster01/srv01?
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Feb 1, 2009
when cluster server will be avalaible?
and I'm curious about the space and bandwidth of this service
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Aug 27, 2007
i am going to use with hsphere preferently i want to use Dell blade server 1955 with exchange and sharepoint, cause the low HD capacity i will like to add and HD array could be NAS or SAN,
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May 27, 2007
put together a high availability cluster for a PHP + MySQL based app to run on a LAN. We're going to use Linux, and cost is a major consern. The app itself doesn't use / need too much resources, as it will only be accessed by 2 / 3 people at a time, so I'm using the following:
2 identical PC's with:
3Ghz PIV CPU
1GB RAM
2x SATAII 160GB HDD space setup as RAID 1
10/100 Mbps LAN NIC's, on a 100MB 8 port switch
Up to now I have been running MySQL-Max 5.0.15 to run a MySQL master-master replication server, which works fine, but the setup involved a lot of manual work, and downloading of the right binaries.
Furthermore I used Linux Heartbeat todo auto switchover between the two servers & RSYNC to sync the application files between the two. This has been working fine untill one of the server's HDD's failed recently corrupting both HDD's
So, I need a better way of doing this, and want to meet the following requirements:
If 1 HDD fails on either server, the server still needs to be able to run without a problem.
Replacing a HDD & rebuilding the RAID array should be easy to manage, preferabbly over the net.
Setting up a cluster should be easy to manage, both for the MySQL DB server & the files that need to be synced between the two machines Re-installing the server should be easy todo as well.
For No.1 I have been thinking of setting up RAID 5 with 4x HDD's - how reliable / safe / redundant is this?
For No. 4 I have been thinking of using something like sysimager to backup the server once setup, but will / can it recreate the RAID array upon restoration? The MySQL DB & PHP files are being backed up to a removable HDD on a daily basis.
The client is 700Km's away, so we can't just drop-in to fix things as often as we like. Thus redundancy is of utter importance. Currently I'm running Suse 9.3, simply due to the fact that it's easy enough to tell the client over the phone howto do things with YaST. Suse 10.1 will be used for the new setup, but I could also use Fedora Core 5, and have also been thinking of using SME server 7.0.
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Sep 1, 2007
Was thinking about running an email server for some local businesses, so they can out source their IT systems (cheaper).
Now setting up a mail server, say running DirectAdmin is normally fine.
However this is a "mission critical" service to these guys, so I want 9.9999% uptime !
I was thinking of getting a few VPS's around 384MB RAM, 20GB HDD spec in the same DC but on different nodes and setting up a cluster...
And then I thought..... How the hell do I do that..? WHT must know.....
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Jul 9, 2007
I have 4 dedicated servers in 1and1 and i want to create a server cluster for windows media services to stabilize the server load. i tried to add the second server details in the first server's windows media services and it always says, access denied message.
how can i give permissions to create a server cluster for windows media services? i didn't installed any additional firewalls in the servers and i am using this for only Windows media services so IIS is disabled. my configuration and server details are below...
Windows 2003 Standard edition 64 bit
Athlon
64x2 3800+
2 x 2,0GHz
1 GB Ram
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Jan 12, 2006
I'm working on a huge project that will take like 2 months or so to release. The thing is, as I expect, this site is going to grow massively. My question is, How can I handle lot of traffic and give lot of space to my users? With a load balancing right? or server cluster? my question is? how does this work? where do I get it? what are the prices like?
All info on it is appreciated, i want to start with one from day one, so I can handle the grownth of the site once it happens.
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Jun 16, 2008
I have a small dns cluster with 4 servers, the problem is that when i want to update a dns registry one of them doesnt sync, i have to try like 6 or 8 times to get that server to sync with all the others, and im concern because the one who gets trouble to sync is my secondary dns server
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Oct 23, 2008
my current servers are part of this mess with Alphared:
[url]
what I'm looking for:
static content main server:
average cpu, average ram
15-20gb data tops, but could use a fast drive
need about 6tb/m of higher quality bandwidth
2 machine cluster for forums
only thing on this will be vBulletin forums.
current database is about 6gb (~7 million posts)
averaging about 800 members active per 15 mins
this isn't for a business, so it all comes out of my pocket. however, after the $#@! with Alphared I do recognize the importance of a good host and I am willing to put money toward that as needed. however, my goal is in the $600-$800/m range for everything.
is that price range doable? if not, what is a reasonable price for what I'm asking? and can anyone recommend reliable hosts (especially one that can correctly setup the cluster for the forums).
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Jul 11, 2009
Could nameservers be setup in cpanel/WHM between multiple VPS so they could be used across them all or would that require dedicated servers?
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Nov 24, 2008
Currently, I run cPanel servers for my clients and also host my company website on them. However, I now wish to place my company website on a seperate system running ISP Manager, and in order to connect the servers to my DNS I presume that I would have to use DNS clustering.
Here is my question - how would I create a DNS cluster between cPanel and ISP Manager? Anyone know how?
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Apr 9, 2008
We have a quad code with 8GB ram dedicated for one website, but still the load goes through the roof and crashes the server. The site has one vB forum (with minimum hacks), and a custom CMS for the front pages which uses a minimum of queries.
I'm not an expert, but it would seem like mySQL is the one that crashes. When the site crashes and someone browse the site, you can see the "could not connect to mySQL through socket" error message. At that point the load just skyrocket (been up to 4-500), and then the server crashes and has to be rebooted.
* Is our only option to make some sort of cluster?
* Could upgrading to i.eg Apache 2.x or installing an op code cacher like xCache help?
* Is it possible to run the databases from RAM to save IO (so it only writes to the HDD on update/insert/delete etc)?
I have root access, so if you need me to run more commands to look up statistics, just let me know.
Server Specs: ...
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Feb 4, 2015
I've added a new Apache/MySQL node to our PPA cluster and we'd like to be able to host a single subscription on that node for the Apache webhosting and MySQL databases for that subscription while allowing that subscription to utilized the rest of the shared resources in the cluster, such as mail, DNS, etc. I'm looking for the best way to go about doing that.
I guess one simple way would be to set the new server to 'ready to provide' and set the rest to not ready, add the "linux shared hosting" hosting subscription to the customer account, then switch the new server to not ready and the rest back to ready. That works fine I suppose in a small cluster, but there has to be a better way. Is there a way to craft a service template that restricts subscribers to a particular node for Apache + MySQL and leaves them to rest of the "regular" nodes in the cluster for other services?
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