Ubuntu Servers :: Setting Up A Load Balanced Service?
Jun 29, 2011
Im used to Win Server so Im not very familiar with ubuntu server, I want to setup a load balanced service I have three server , one as a load balancer and the other two as my web servers, now my questions is that what are the steps I need to do to setup my cluster, I dont mean the requirements, not the actual detailed configuration.
Im gonna have my Mail server on these servers, how am I gonna setup the mail server to work with the load balancer, I mean is it possible to load balance the mail server like web server on ubuntu?
I am planning to implement hardware load-balanced DNS servers. There will be one master and three slaves in the server farm. I will have two virtual servers associated with the server farm that will be listed as external nameservers for our domain.
BIND uses the list of NS records to determine the servers that need zone transfers. The zone NS records will not be the addresses of any of the real servers. How do I tell the master to do zone transfers to the real slave servers?
how to setup an Active/Active Load Balanced and High Available (If one of the nodes is down the system still runs) MySQL cluster. I have found quite a few howto's but I have some things unclear in my mind. I found a few solutions like this one: [URL] or this: [URK] Those are using two or four MySQL nodes, two Load Balancers to avoid a single point of failure but only one MySQL cluster management server. What happens if the MySQL cluster management fails?
I have also found a "MySQL Master-Master Circular Replication" technique but from what I read, with this option there is a chance that conflicts will arise if node A and node B both insert an auto-incrementing key on the same table.
I have an Ubuntu Server, a dyndns account and an account with [URL]. My DynDns stuff is all working just great - novo.dyndns.tv is the address. Now I need a domain which I have already bought, to be linked to that machine at [URL] I signed up with freedns.afraid.org and now I am a bit confused at what records to add where. I added a domain - [URL] then setup a webforward as follows: redirect from [URL] and redirect from[URL] to [URL] , however if you go and visit:[URL] you will see my problem! It takes you back to [URL] server and says there is not a webforward setup for [URL]This tells us that the nameservers are all setup fine - and its something in my freedns config which is failing.
I am running Server 10. I have a requirement to perform an action before the MySQL service starts, and perform another action after MySQL service stops.
I found the init script for MySQL under /etc/init/mysql.conf. I added my thing to the pre-start script there and works fine.
I am having trouble finding the script that stops the server so I can modify.
i already installed mailscanner and other component as well as. the problem is when i log to mailwatch gui, mailscanner and postfix status show no.--it's should be show yes ..
how to overcome that or enable that problem?
how to setting mailscanner using postfix should the mail will filter first before pass to mailserver.
anybody have configuration file that's work well on setting mailscanner using postfix?
I am setting up Fedora-13 with "389 directory server" for authentication. I had performed the following steps.
1. Install FD-13. 2. Yum install 389-ds. 3. Run script to configure. 4. Start 389-condole and create few group and user for testing.
I can see these user with "ldapsearch" and with "phpldapadmin". It looks my server is responding. However, I am unable to see any user name with "getent passwd". also "ssh server_user@server" is not able to login. Whereas "getent passwd" shows local user and "ssh local_user@server" is able to login. Also note that I am not using ssl, so want to avoid ssl.
There is a particular java app called LanguageTool which we need to host on our centos server. Other applications are supposed to send an http request to this machine; this machine should pass this data (received over the http request) to the java application concerned, obtain the output from the app; and then send this response back to the requesting client...
We need to set this app as a service on startup. The centos machine might restarted from time to time; so we expect this service should startup automatically. What can I do to get this done?
How do I configure my modem without setting a service provider? When I try to configure my modem I can't get past the page for setting my internet provider. I have DSL and only use a modem for faxing. I'm running SUSE 11.3 32bit with KDE 4.5.2 and the modem is a BCM4212.
i just wanna know if there is some script out there for shutting down a certain service if the load exceeds a specified value?
I've a system with a DBI-Proxy running, most of the time the systems load is about 2~3...if a DB-connection dies, the load rapidly increases (very fast) and after some seconds the load is > 200 and i'm no longer able to shut down the DBI-Proxy manually...or do anything else via ssh...
Now i wanna have a script running in background that checks the system-load permanently and stops the DBI-Proxy if the load exceeds...well, lets say 10 or whatever.
I'm running into a strange problem trying to change the service load or boot order on my CentOS 5.3 box.
The service in question is shorewall. When I go to my /etc/rc.d/rc5.d/, I notice that shorewall is listed a S27shorewall. I need it to start much later. So I run a simple command "mv S27shorewall S99shorewall"
I then restart the server. But after the reboot, something has reset it back to S27shorewall.
For those of you who like the background story: I need to change it to S99shorewall, because I need shorewall to start AFTER xend does all its stuff, as xend messes around with the underlying networking of the computer. The xend stuff was at S98 and S99...but I was able to successfully rename them back to S97 and S98, and the rename stuck. I've also renamed other service orders. Those stick. The only one that gets reset is shorewall, always back to S27. I have no clue how to tell what is causing the resetting...
I just installed the software for my APC UPS on my SUSE 11.2 machine. After some work I finally got it work except I have to go and start it each time I reboot. It is supposed to load automatically, but somehow mine doesn't. If I go to a command prompt as SU and type "apcupsd start" and then go look at the GUI everything shows up fine.
When installing Samba and Webmin I use the application "system-config-services" or (if it is easier to find for you that way) menu->Administration->Service management. In this application I can start the services I need (nmb, smb, webmin), but the enable/disable at startup setting is greyed out... Even when I start the application as root it still gives me no possibility to configure the services to start up on boot. This should be possible. It works this way in Fedora 13 and Fedora 14, so why not in Fedora 15?
Before reporting a bug, I would like to ask if other users here have the same problem (and -if possible- a solution)... In the mean tim I guess it is back to the old way of configurating services - sigh..
[edit] I tried to remove the [SOLVED] from the title, but the forum software does not seems to allow me to do that... I thought it was solved by installing xinetd, but I was happy a bit too early. I still have no answer for this problem.
I'm interested in setting up and providing my own DNS services for public use. I have two separate server machines and can easily put an extra NIC card or two in any machine, if required. What would it take to create such a service like ZoneEdit or EveryDNS?
I know I'd probably need to register 2+ static IP addresses thru Comcast and open a whole host of ports on my router. How would I set this up in terms of software? Is BIND the right tool for the job with a control panel in Usermin/Webmin?
I just updated my server, (Ubuntu 8.04) and had to restart. Now I can no longer SSH into my Linux box or access my website from the internet. Apache is running and everything worked fine before the restart.
I am trying to set up a web server, i have put in a hostname.In terminal command: hostname shows 'promisedland, but hostname -F gives me name or service not known.How do I associate hostname properly, I have registered a hostname through DynDNS.I can access the page in my browser so I know it is there, I see the blank "u made it page".I just want to host a web server w/ a directory to my shared files (movies, music etc) that are on my server.
Still a Linux noob here. I downloaded openssh and did a ./configure and a make install. How can I run openssh as a service? When I try /etc/init.d/ssh restart it doesn't work. It's installed in /etc/openssh.
Is there any Print Management service for centralized Print Manager and Print Monitor?
My requirement is a Print Management Server which monitor all the printers in my office and keep tracks of all the the printing operations (IP of the user, Digital copy of the printed documents, date, time...)
I installed CUPS but it's not the solution which I'm looking for.
i just installed frox ftp proxy for my server using apt-get install frox.after i installed it i did 'sudo /ietc/init.d/frox start" and got t this "starting frox:caching ftp proxy server: disabled"
I have set up one of my linux box as link load balancer for two ADSL connection. After deployment, I have found out that instead of being fast, it has become slow. What I have observed that my request get out to internet but comes back intermittently. Is this a standard scenario ?
have a web application that runs fine.Whenever I run jetty manually the application runs ok. This is what I do:sudo java -jar start.jarThe application is located within the webapps directory correctly and the required jar files are within /usr/share/jetty/lib.But when I run jetty as a service:sudo service jetty startThe server starts, but the application does not respond. There is no error in the output. This is very strange, isn't it
I've got a small web hosting service, for some of my friends. Where I want my friends to be able to have dedicated virtual servers just for a simple LAMP and ftp-server.
What I would want to know is how to create the virtual servers in an truly optimal way. Should I use KVM or VirtualBox? How can I make the request to mydomain.org go to one of the virtual servers and the request to anotherdomain.com go to another virtual server?
If the virtual server is the best solution. * How much memory should be sufficient for a simple LAMP/FTP-server? * What would be the most optimal settings for my limited hardware capacity?
all the tutorials i found for ushare and mediatomb shows it installed on desktop and not server. it also requires an account to be logged in. once logged it, you have to run a command to start it up. some questions.
1) is there a way to run either one w/o having to log into an account? so if say i restarted the server, it'll run the programs w/o me having to log in.
2) i would like to specify a directory to share music and movies. is one better than the other? clients that i plan to use are songbird, itunes (maybe), and vlc - maybe xbox 360 and ps3. other client suggestions?
3) other dlna server suggestions? this will be running on ubuntu 10 or 11 desktop or server. but the main thing i'm looking for is what i mentioned in #1.
I have a few problems getting a custom service/daemon to auto-start at boot. I'm running ubuntu 11.04 Server amd64 edition. One of the services is a Teamspeak3 server I'm trying to start. I would like it to start up automatically on boot. ts3 already have a script with start/stop commands so all i have done is make a little script for it to get it to run as the correct user.
I am trying to run a service that listens to a port for instructions from a Windows box. It is called timetobackupservice. I use the following command to run the service ./timetobackupservice from a command line. It seems to run, indicates which port it is listening to, but then hangs up. When I move the cursor, it "enters" a bunch of odd characters and I have to close the command line window. When I check to see if the service is listening to the port (netstat -tulnap) it shows that it is not listening.
We need to setup a load balancer (software) for an apache web service in order to balance the load between two servers.
In explenation:
- two physical servers exist that runs a web based application (exact copy of each other) - Real servers using Apache as the web server. - Users need to connect to a "virtual link" whihc will then load balance across the two servers based on the host that is the least busy.
Currently using Ultramonkey, however after upgrading to RHEL5.4 , Ultramonkey is no longer supported and installations fail.
Can anyone perhaps provide me with some ideas on alternative options for this keeping in mind that the client will have to be able to manage this afterwards as well.
