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
View 2 RepliesI know this is not an awesome idea, but I'd like to try it. A friend and I want to share (home) servers. We both have fairly decent upload and we both have nice (dual core, 1GB RAM+) servers, so that's good. Another thing I'd like is failover for when one of our servers go down (I've got that part covered with my own DynDNS client). We're both running Windows servers.
Since I cant really use a load balancer in this situation, we'll be using round robin DNS. Now here's the questions:
How do we keep our MySQL servers synced?
Should I use rsync or something else for files?
How do we handle PHP sessions across servers?
If you don't think the load balancing thing will work out, I'd still like to do synchronization and failover. My friend is in another state by the way, we're not neighbors or anything so we can't just run some cables from one house to the other.
Here is what I am trying to do, to set up a WordPress powered site to be run across two servers for load balancing. The two servers are dedicated and I have the load balancing software installed and set up. I need to set up the site so that both of them are accessed, but to also have the same content. The main concern is for the same content.
WordPress uses a MySQL database to place all of the content there, so the main thing I would need is to set up the databases so they are synched on both servers, so that the same content is showing up on both of the servers, and so I don't have to manually upload data to the database every few hours, that would suck. I have already found a script to connect to a remote mysql server, it is called HyperDB, but I was wondering if there are any better ways.
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?
when cluster server will be avalaible?
and I'm curious about the space and bandwidth of this service
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
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,
View 10 Replies View Relatedput 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.
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.....
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
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.
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.
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).
I have a website that can be seen in a part of the world but not on the other. How can I troubleshoot this issue. Is there a web utility that can help me figure out what is the problem?
View 1 Replies View RelatedIs security really that critical? If so, why are some of the largest software companies providing such a bad example for the rest of the industry? Why would someone want to target my website? Why is security often overlooked?
These are all common questions that arise on a daily basis within the online industry.
The rest of this article will provide some detailed answers, along with practical examples and true scenarios.
I've spoken with numerous hackers over the past short while. I can't count the number of times I've heard the line "Ignorant site owners deserve to be hacked". In my opinion, that's like claiming that cars without alarms deserve to be stolen, or homes without alarm systems deserve to be burglarized. It's not just wrong - it's illegal.
Security risks and vulnerabilities affect the entire online industry. When a single website is hacked, there are usually multiple other victims. This is most commonly seen with widely distributed software. A potential attacker has the ability to install the software on a test environment, locate the vulnerabilities, then attack random victims even before anyone else is aware of the potential exploits. Once a vulnerability is located, the attacker simply needs to search for other environments using the same software, and within minutes there are hundreds, often thousands of potential victims.
Typically, in the race to market, software providers are encouraged to release their products as soon as the applications are usable. Critical development procedures are often overlooked or intentionally bypassed. One such miss is an application vulnerability assessment. Although the product may be usable, the effects of a vulnerable application could be severe.
Sadly, nobody is "off limits" when it comes to hacking. Most hackers feel safe committing online crime, since the online industry has evolved much faster than the security industry. Many applications are not created with the intent to recognize hacking attempts. Some hackers view their actions as a competition - Who can attack the most valuable website? Who can exploit the most user databases? In many cases, these attacks are bragged about within the hacker's immediate network. The competitive nature of these hacking groups has become so severe, there have been reports of attacks between competing organizations.
You might ask, "If I use industry standards, won't my environment be secure?". The short answer: no, but it helps. Hackers are not restricted by industry standards. Most security companies only implement new standards once at least one victim is reported. This often gives hackers plenty of time to locate other vulnerable environments, and before long, the number of victims can increase rapidly. Hackers are some of the most innovative individuals within the online industry. The most logical way to combat them is to use similar methodology for security purposes.
One of the most reliable & dependable webhosts around: Aussie Bob's Dotable is now a part of the UK2Group.
Read announcement:
[url]
The new plans unfortunately resemble that of a typical overselling host.
I am having trouble finding a good sysadmin for my needs. Has anyone else been in a similar situation? Does anyone have any advice on how to find somebody like this?
SITUATION:
I am having trouble finding a reliable RH sysadmin. I have a handful of clustered HA setups for customers (6+ servers & load-balancers) and a number of single-server dedicated hosting customers. I do a lot of the work myself. The additional sysadmin usually only has a small amount of actual worked hours per month, dependent on new installs. But, they need to be reliable, available, and familiar with the complexities of the setups.
From what I have seen, some sort of server management company wouldn't be able to be familiar with the setups well enough to not regularly make errors or modify setups correctly due to the amount of clients they have.
Could nameservers be setup in cpanel/WHM between multiple VPS so they could be used across them all or would that require dedicated servers?
View 5 Replies View RelatedHi 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?
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?
Should/home be its own partition when using r1soft, or can it be part of/?
View 7 Replies View RelatedI 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?
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: ...
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?
Is bandwidth going to be my most expensive cost if I open up a video hosting site? Is there a inexpensive alternative? Is there an inexpensive web host with low cost bandwidth allocation?
View 9 Replies View RelatedI have similar problem that explained [url]
The detail of my problem is below:
Some people sent spoofing mails from our mail users sent to our user from Postfix/local that is listed in maillog like below:
Apr 29 16:57:02 ns1 postfix/local[3075]: EC2153565E3: to=<user-mydomain.com@ns1.mydns.com>, orig_to=<user@mydomain.com>, relay=local, delay=486, status=sent (delivered to command: /usr/bin/procmail-wrapper -o -a $DOMAIN -d $LOGNAME)
Bu i do not know how to prevent this people not to use my Postfix/local delivery part. How can i prevent this attack?
When i connect to my mail server to sent or receive my mail it look like
Apr 29 17:25:28 ns1 dovecot: pop3-login: Login: user=<user@mydomain.com>, method=PLAIN, rip=***.***.***.***, lip=***.***.***.***
....
Apr 29 17:25:55 ns1 dovecot: POP3(user@mydomain.com): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0....
But the attackers connect directly like below:
Apr 29 17:29:59 ns1 postfix/local[2456]: 3192E357FD9: to=<user-mydomain.com@ns1.mydns.com>, orig_to=<user@mydomain.com>, relay=local, delay=261, status=sent (delivered to command: /usr/bin/procmail-wrapper -o -a $DOMAIN -d $LOGNAME)
....
Apr 29 17:29:59 ns1 postfix/qmgr[2218]: 3192E357FD9: removed
How can the spammer connect to Postfix/local part? My mail server not open relay. i test it from internet.
A few people have asked me to give feedback on my experience with VolumeDrive so I decided I will be posting a 3 part review on them:
Part 1 - initial impressions
Part 2 - three month review
Part 3 - one year review (hopefully)
-------------
When I first got in contact with VD, contact was slow: about an email a day. It was very annoying to say the least. However when VD realized that I was genuinely interested in purchasing a server, and not just a window shopper, contact was more frequent and acceptable.
After looking around and comparing, I ended up ordering the following server from VD for a whopping $105 per month:
Q6600
4 GB DDR2 800 RAM
500 GB HDD
10 Mbps dedicated unmetered
5 IP addresses
Plesk 30 domain
Full managed services
Well just at face value, I don't think anyone will argue with me when I say you cannot beat the price. Where else will you find that kind of server w/ full management for $105 a month?
In the ordering process there were a few forgivable annoyances:
1) VD does not have any sort of automated, order online system for their "good" deals. I had to order via email and manually pay from PayPal. I was, however, emailed an invoice confirming my purchase after I paid.
2) It took VD 2 hours to send me my order request after I said "I am ready to purchase". Now it was late at night, so they probably only had a skeleton staff on hand, so this is understandable; however this point is sort of related to the lack of an automated system point mentioned above.
So after I paid and all, I was told they were building me a new server and it would take 3 business days to arrive. I was bummed out upon hearing this but this was understandable and justifiable - if they don't have the parts on hand, they don't have the parts, no big deal. I did appreciate the fact that they were honest with me upfront instead of trying to con me into giving me a different server (like I have been hearing stories about with other hosts).
So I waited. I was told my server would be setup on Tuesday afternoon and it was. The actual time between order and setup was about 5 and a half days: 3 days for the parts to arrive + Saturday + Sunday + time to build the server.
On Tuesday I was informed that my server has a Q8200 instead of a Q6600. To me this was not a big deal so I didn't object but if you are going to order from VD and you want one specific CPU I would be very clear with them that you won't accept any alternative. What did make me chuckle, however, is the fact that I was told "I received a free upgrade" to Q8200. It made me chuckle because I don't consider it a "free upgrade" when I was offered a choice between the Q6600 and a Q8200 for the same price during the ordering process. However, as I already said, a Q6600 or Q8200 - it does not matter to me: both are very similar in performance anyway.
So since I got my server I have been busy setting it up so VD can secure it after I am finished migrating my website (which by the way they just did - I just got an email ).
During that time I have emailed VD a fair amount of times, sometimes asking for clarification and sometimes asking for assistance with a problem, and they have responded back in a more than acceptable time frame and manner.
The only one major problem I have had so far is that initially, and by initially I mean first ~12 hours, it seems the connection to my server was not all the best. Randomly pages would take a while to load; I was curious as to why this was happening so I did some pinging and saw packets were being lost sometimes. This problem seems to have been auto-corrected itself now and I am did email VD about it; hopefully if it happens again we can get it perma-fixed.
Final verdict: people say "you get what you pay for". I say "I got more than I paid for". Hope it continues this way.
Today I'm back to encourage you to stay away from Crissic: I know the prices are tempting, but know that you will have no one on your side when a problem comes up. I finally closed my account with them after numerous major issues with my VPS.
I've had a simultaneous account with Slicehost for the past few months, just to see if paying the extra buck is worth while. Now I know it absolutely is. I'm paying double the price for half the resources with Slicehost, but their service is amazing and reliable, their support is stellar, and peace of mind that the server will stay up and running without load issues, memory or drive failures is worth every penny. The point of this post is not Slicehost though, back to Crissic.
When I signed up for Crissic, I knew that it was a relatively new web hosting startup, but I had no idea it was a one-man show. Yes it's probably possible for a single guy to run a small web hosting company--the problem, particularly in the case of Skylar, is that when something is beyond him, it isn't getting fixed.
A recent support incident occurred where I was suddenly unable to access my VPS via SSH or the console. I contacted support, here are some of his responses to my status inquiries: ....
Are there any web designers/developers who offer hosting to their clients as part of their website creation package. I am toying with the idea of only creating websites for people who host with me. I currently have a colo server, but only use it for personal things. So I have no experience with the needs and demands of clients in regards to hosting. What are some of your experiences with hosting for clients? Is it worth it?
View 15 Replies View RelatedIs it possible to extract part rars using unrar (or other programs) on centos4?
If so, how and what command to use?