I just set up a cPanel DNS Cluster today. Followed the guide, and everything didnt according to my plan. As in, setup went fine, setting it up went fine too. But I do not think I understood how this solution works in real... or atleast I had assumed it to work in a different way.
So for my questions...
1) How and where do I edit the DNS Zones. On the local system or the DNS dedicated server?
2) How do I create nameservers for this dedicated DNS server? Not the registrar part, but the A record and NS record part.
3) Small doubt, not a big one. Does the DNS server have to be in stand alone mode or synchronized mode?
I'm currently using Cpanel on all our web hosting machines (total of 6 machines). Each runs its own DNS but also uses the Cpanel cluster feature to sync between all machines.
This has got to the point where DNS updates will not stay, the machines get very lagged etc etc. Now I have put 2 more machines online to do nothing but DNS.
I am working on setting up a few servers that run cPanel and the usual software, minus any sort of DNS server. These servers are setup to sync all DNS records over to a cPanel "Dns Only" (ns1.domain.com), which in turn syncs all its records to a backup DNS server (ns2.domain.com).
In other words: [Domain registrar] | | [NS1]--Sync-->[NS2] | (Sync to NS1) | Cpanel Web Server
Now, say something happens to NS1 and the sever goes completely offline (i.e. power supply dies, CPU goes bad, etc.), which of the following scenarios would actually happen:
1) Because the registrar lists both NS1 and NS2 as NS records, NS1 would time out and the DNS lookup would look to the secondary DNS (NS2) for the record.
2) The registrar would randomly give out NS1 OR NS2 because of round robin, and if NS1 is given to a client as the result of a DNS lookup, the site will appear down, however if the client happens to be referred to NS2, the site would appear online.
3) The site would be down no matter what.
So, if someone with knowledge on the subject wouldn't mind enlightening me as to which of those would actually take place in the event of a failure on NS1, and maybe some suggestions as to keeping the DNS truely "redundant", then I would greatly appreciate it.
And Im aware that there are many 3rd party services that will take care of the DNS records and make them redundant (DYNDNS, DNSMadeEasy, etc) But I would prefer to keep the DNS in our full control.
I am trying to setup a server cluster for my client and was thinking about load balancer. Currently he has 4 Servers and 1 VPS.
4 Servers are in the same datacenter while VPS isn't.
Now from my thoughts about the system load, I have decided to setup like this: VPS being the load balancer 2 Servers being the Apache 1 Server being Storage server 1 Server being MySQL
This will be hosting two forums that has very high concurrent access.
Now the problem is VPS has only 200GB/mo bandwidth while he needs about 800GB total. My question is is there anyway to load balance the servers without the traffic going
like this: LoadBalancer-->Apache Servers-->LoadBalancer-->USER If the traffic goes like that then VPS needs to have about 1600GB bandwidth and will have network bottlenecks.
I would like the traffic to go like the following: LoadBalancer-->Apache Servers-->USERS
Our server is going down due to several reasons. We decided use load balancing or clustering solution. What are the main difference between load balancing and clustering?
Im going to start to plan to build a new hosting setup within my business and aim to slowly move away from the shared hosting scene and move into clustered (web hosting)
Now im not great with words so i am sorry if any of this doesnt make sence.
Im looking to build a setup using 5+ Dedicated servers, using a cluster config and using something like plesk on top to offer high availability hosting. As i understand it using a clustered setup will provide a much higher chance of keeping 99.9/100% uptime as it eliminates a single point of failure.
But what im un sure on and what ive not learnt about yet is what is needed to make this work, what kind of software is involved and how would the Hard-drive arrangement work. For example
If each server had 5 Hdd's in Raid5 totaling 1TB Space and there was a total of 5 servers, would there still be 1TB space overall of does it work slightly different to that?
I have been searching and searching for a solution. We are currently using one single vps to host some of our clients. We are finding more and more that we need to have some redundancy.
I have looked at using DNS failover using RSYNC/mysql replication etc with two servers, but just dont like the idea.
I have also looked at hosts like imountain etc that use h-sphere. I dont like this setup because services are split onto single machines. For example mail is done on one single server, therefor if that server is down, mail is down.
What I am looking for:
I am trying to stay in a budget of 150/month or less.
I would like to get one of the two options here:
option 1: two vps's or dedi's that technically act as one(a true cluster) then on top of that is OS and control panel and done. This solution doesnt allow for whole datacenter outages, or network issues.
option 2: Two geographically placed vps or dedi's that are somehow either load balanced, or failover.
Ultimately our goal is to have high uptime, but we dont really have much server load.
Basically failover is ok as loads are always low anyway, but if we are paying big $$ it would be nice to have it load balanced.
Please let me know if my expectations are way to high or my price is way too low. I need to find a solution here somehow and if I cant find anything will most likely just go with DNS failover.
I am going to build a clustering system for a customer. It's around 15 servers running apache, mysql and mail. Wondering which switch do you recommend for that? I am using a HP Procurve 2524 for another smaller system, but customers face to slow performance *sometimes*
For the feature, dont need much. Dont need routing feature (Layer3 switch?), just to connect all of them into a clustering system.
I have a 2 cPanel DNSonly cluster setup for all our hosting operations.
However, we are adding a Windows Domain Forest (for Outlook "push-mail") for this the windows server needs to be its own DNS server. We are also planning to host sites on the windows server (no control panel).
Is there any way that I can allow cPanel to use Windows DNS as the new "cluster" and update/delete/add records of DNS to the windows machines?
Same would apply to this question, we are thinking about adding a Directadmin test box, but we want to keep our NS1 and NS2 cluster so they all work with it. Is it possible? What is the feature called if you can't elaborate on it so I can research it?
So would the load times be noticeably longer if I ran load balancers, and then had my web servers nfs mounted to file servers / san and connecting over the network to database servers? It seems like a lot of network overhead to deal with.
I'd like to get your recommendations on how I should approach this problem. I posted this in another part of the forum, but I feel that this is a more appropriate place for it.
Problem:
How to handle large amounts of traffic with for a social network website? If a user uploads a photo or video, how does it become accessible on all of the server? If traffic is expected to be about 500,000 visitors a day, how many machines do you think I should use?
Possible Solution:
I've come up with the following possible infrastructure.
One load balancer. The load balancer has 3 PHP/Apache servers behind it. Behind each of the PHP/Apache servers is a (slave) MySQL server, from which data is read. Behind the slave MySQL servers, there is 1 master MySQL server, which handles all of the database writes. The master MySQL and slave MySQL servers are synced up, so data is up to date.
The actual photo and video files are not stored in the database, only the links to them is stored in the database (to keep the database small). The photo and video reside in a central location (like a SAN or NAS), which is accessible by all of the 3 PHP/Apache webservers.
Questions:
1. How many machines do you think will be able to handle photo and video uploads for 500,000 visitors a day?
2. Is having a SAN with Terabytes of RAIDED disk space an available option?
3. If a SAN or NAS is not an option, does anyone have any ideas on how to make sure all of the web servers have access to the same photos and videos? Is rsync a viable solution?
4. Which hosting provider do you think I should go with?
5. Is clustering what I need? What is clustering and how will it address my concerns?
I'd like to get your recommendations on how I should approach this problem.
Problem:
How to handle large amounts of traffic with for a social network website? If a user uploads a photo or video, how does it become accessible on all of the server? If traffic is expected to be about 500,000 visitors a day, how many machines do you think I should use?
Possible Solution:
I've come up with the following possible infrastructure.
One load balancer. The load balancer has 3 PHP/Apache servers behind it. Behind each of the PHP/Apache servers is a (slave) MySQL server, from which data is read. Behind the slave MySQL servers, there is 1 master MySQL server, which handles all of the database writes. The master MySQL and slave MySQL servers are synced up, so data is up to date.
The actual photo and video files are not stored in the database, only the links to them is stored in the database (to keep the database small). The photo and video reside in a central location (like a SAN or NAS), which is accessible by all of the 3 PHP/Apache webservers.
Questions:
1. How many machines do you think will be able to handle photo and video uploads for 500,000 visitors a day?
2. Is having a SAN with Terabytes of RAIDED disk space an available option?
3. If a SAN or NAS is not an option, does anyone have any ideas on how to make sure all of the web servers have access to the same photos and videos? Is rsync a viable solution?
4. Which hosting provider do you think I should go with?
5. Is clustering what I need? What is clustering and how will it address my concerns?
I currently have a server (Xeon 1x5310, 4gb RAM, 4x500gb hdd in Raid 10) with Windows 2003. Now do to a project I'm looking at installing Windows 2008 and upgrading to 2x5310 and 16gb of RAM on my server.
I'm looking to create a virtualized test environment for development of a new web service I'm working on. What I'm looking to develop right now is 2 file servers, 3 web servers, 3 MS SQL database servers and 1 DNS server (would prefer but not sure if hardware can handle it. Virtualization would be ideal as this is very similar to what we believe will we have when we launch the service.
I have a few questions I'm hoping you might be able to answer:
1) With the upgraded hardware specs, should it be able to handle the load if I assign each virtual entity 1 core with 2gb of RAM each?
2) I would like to create each of the multiple servers in a cluster (ie cluster of webservers) as this is how it will be in production. But, I've never worked with clusters before so:
a) where can I learn about clustering windows 2008 servers?
b) is this possible to do in a virtualized environment?
3) How does MS work the licensing? I want to have each server running Windows 2008 and 2-3 of them running SQL Server 2005.
a) Do they charge extra for each virtualized server?
b) Does this mean I have to purchase 3 complete copies of SQL Server or is there a way I can pay a low license fee for use in a non-commercial, non-production environment?
4) Does anyone see any problems with this setup or have any suggestions for me?
* I do have money available to spend on a good solution, so if you have suggestions that cost please let me know. I just thought virtualization would be the way to go as the project will be in development for at least a year with no public access.
** I realize that Hyper-V hasn't been released yet (that I know of) so information on it might be limited
Code: /usr/local/cpanel/cpkeyclt Updating Internal cPanel Information.......Died at /usr/local/cpanel/Cpanel/CpKeyClt.pm line 132. ...propagated at /usr/local/cpanel/Cpanel/CpKeyClt.pm line 132. .Done
An arbitrary file inclusion vulnerability has been discovered in the Horde webmail application. At present, we can confirm that this security vulnerability in question affects Horde 3.1.6 and earlier. Based on incomplete information at this time, we also believe this affects Horde Groupware 1.0.4 and earlier as well (cPanel does not use Horde Groupware at this time).
cPanel customers should update their cPanel and WHM servers immediately to prevent any chance of compromise. The patch will be available in builds 11.18.2 and greater (or 11.19.2 and greater for EDGE systems). The updated builds will be available immediately to all fast update servers. The builds will be available to all other update servers within one hour of this posting.
To check which version of cPanel and WHM is on your server, simply log into WebHost Manager (WHM) and look in the top right corner, or execute the following command from the command line as root:
/usr/local/cpanel/cpanel -V
You can upgrade your server by navigating to 'cPanel' -> 'Upgrade to Latest Version' in WebHost Manager or by executing the following from the command line as root:
/scripts/upcp
It is recommended that all use of Horde 3.1.6 and earlier be stopped (on cPanel and non-cPanel systems alike) until Horde updates can be applied. You can disable Horde on your cPanel system by unchecking the box next to 'Server Configuration' -> 'Tweak Settings' -> 'Mail' -> 'Horde Webmail' within WHM, and saving the page with the new settings.
I have 2 servers both have cpanel. I want to use 2nd server's mysql in my site which is on 1st server. I think thats not that hard. I don't wanna do clustering as this is temproary.
I am in the process of moving websites and emails to a new host. I am doing the transfer manually because we are gradually moving different part of the site at one time to allow developers to work on new parts.
I now want to migrate all of the email accounts off the old cpanel server to the new cpanel host. What files and settings do I need to move so settings are not lost, such as save mail and contacts?
I'm having big trouble trying to update an SSL certificate with cPanel.
I'm such a dummy that I've ended up buying 2 SSL certificates to see if that may fix it.
I now have 1 certificate for www.mydomainname.com and 1 for just mydomainname.com
I have logged into the account in cpanel and uploaded both certificates and when I view them in Security -> SSL/TLS manager -> Certificates They both display the correct host, correct issuer, and correct expire date.
But when I try to visit my site using https I get:
I had a website created a few years ago. I am trying to update that website now. As ROOT, when I log into CPanel via WHM, I am unable to see a File Manager.
Anyone here use PAX in their kernel builds? I've been trying to find a setup that works, but with no luck. stability wise.
I can run CPanel fine with just about any PAX setup, but after awhile with some settings the server eventually will get a load of over 250 and 1000 processes like it's not able to terminate them, or turn 4GB ram into like 3.2GB ram.
Okay does any one here know how to install svn with cpanel as all the ones i found in google it install svn but to anther apache in a diff folder like /etc/httpd/conf and not in /usr/local/apache/conf
using centos5 and installing using the yum command (i would like to use it from the site but do not know how to compile a install)
