Server :: Two Servers Versus Virtualization
Jun 2, 2011
I am leading a project at work that will require at least one new server. There will be a development server and a production server, which changes from development will be rolled onto. Unfortunately, I am more of a web programmer than a Linux guru, and I really don't know whether or not it is better to have two physical servers or two virtual servers on one machine. I don't think there will be a huge toll on the machine, as there will probably be around 1000 total users and less than 100 on at any given time. We are also able to spend quite a bit on the server, so I'm sure one could handle it, but I just wanted to check and see what the advantages and disadvantages would be in this situation.
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May 2, 2010
I am reading 'Deploying Rails Applications' and want to create a Rails clustered deployment setup as described in page 141:
Host: Ubuntu server
Guests: 2 Ubuntu vms, each with Nginx on port 80, a few mongrels (app server for rails) and MySQL
What open source virtualization software do you recommend for this purpose? I am trying virtualbox but heard good things about KVM. I have some questions regarding vbox and posted them on vbox forums - [URL].
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Mar 12, 2010
I want to run 4 instances of a Virtual Machine on a Dell Power Edge 7401 machine want to know which Virtualization platform will help is there any performance compatibility test some where so that I can understand it.
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Jul 24, 2010
There are lots of technologies which are used for virtuaizing such as OpenVZ, Xen, VMWare, KVM.
I tried all except KVM. Is there any web gui control pane which can be used for KVM virtualization ?
Like, HyperVM is used for openvz and xen, vmware have their own control panel web gui
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Apr 3, 2010
I have set up UEC and have installed the store images. I have seen that we can create and run instances which are similar to virtual machines. We can utilize virtualization and create virtual machines and thereby fully utilize the server. Not sure what extra benefits or features can be achieved using cloud (say UEC). I suppose I am missing something. Kindly let me know how cloud adds more value than server virtualization.
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Nov 22, 2010
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.
I've got quite limited hardware.
AMD Athlon II (Dual core)
4 GB 1333 MHz DDR3 RAM
100 Mbit Fiber-lan ( Dynamic IP )
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?
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Jun 4, 2011
I cannot find the packages contain virt-manager and virt. Does anyone know where these are located on the CD or ISO?
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Feb 2, 2011
I have a customer who has (currently) three servers running Centos 5.5, one running Windoze 2003 and around thirty or so workstations running XP Pro.
I've just been reading about RedHat's product - RHEVD and was wondering of anyone knows if this product (or anything similar) is aavailable under CentOS.
Basically what we need to be able to do is to virtualize the XP workstations so that the staff can connect via a browser (inside the office or off-site - or for that matter anywhere) and be presented with a standard desktop.
I know I can achieve this using Citrix XenDesktop or VMWare View but I would prefer to use a FOSS solution if one exists. Having said that it has to be robust and well past Beta
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Jan 5, 2010
I have server with the relevant RPMs for virtualization, but i can't find the way to change it to be virtualization server. I am using Redhat 5.3 Do you have any relevant document for configure virtualization server after OS installation?
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Jun 26, 2009
The word on all lips are "virtualization" so I decided to smell this flavor.
I have a machine running CentOS 5.3 64bit and I have unlimited access to this machine, but I don't want to reach it physically.
Is it possible to install and maintain a virtual medium using ssh or other remote connection?
When I installed the OS I have selected the packets regarding the virtualization, but now from where can I start?
Is somewhere a guide for doing this?
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Apr 21, 2010
Just curious to see what everyone's opinion on using routing vs. bridging for openVPN. I'm installing openVPN on a linux box that I'm using as a router. What I was wondering was your opinions on which one of these two options to use.
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Jan 17, 2011
I want to setup either Zimbra, qmail or sendmail. i have no idea of these three mtas (i am new to these mail servers)but give me the suggestion that which one is better in case of security, fast routing the messages, scalibility and portability and cost.
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Mar 8, 2010
I have been a RPM-based distribution guy for a long time (redhat,centos,suse). We have a large shared and dedicated web environment that is starting to require more and more linux. I am in a position to switch gears and move to ubuntu if it makes sense. Things that are important to me are:
1. ease of deployment (both servers and websites themselves)
2. patch management
3. documentation
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Jan 20, 2010
I've noticed something strange in the behavior of how Ubuntu server obtains it's IP address versus Ubuntu desktop and other versions of linux and Windows. When Ubuntu desktop obtains an IP address from my router that address is retained from one bootup to the next, same behavior as Windows, SuSE, and pretty much any other OS. Ubuntu server on the other hand grabs a different IP address everytime it boots. At first I guessed it was a difference in /etc/dhcp3/dhclient.conf so I replaced it with the dhclient.conf from Ubuntu desktop but no dice, it still grabs a new address every time.
In /etc/network/interfaces Ubuntu server defines the loopback interface and primary network interface, just as it should but Ubuntu desktop does not define the network interface, only the loopback interface. I'm guessing something else controls does this. Desktop appears to be storing previous IP lease information in /var/lib/dhcp3/dhclient.eth0.leases but server doesn't, /var/lib/dhcp3/dhclient.leases is always empty and there's no other files in /var/lib/dhcp3/.
Apparently something isn't writing old lease info there. Without setting a static IP address, how can Ubuntu server be configured to retain the same IP address between boots like Ubuntu desktop?I'm using Ubuntu server 8.04LTS, Ubuntu desktop 9.10 & 9.04, SuSE 11.0, Linux Mint, Windows XP, pfSense 1.2.2 as router.
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Jun 11, 2009
I had just put the last touch on a snort, mysql, apache, barnyard, base isntall to CentOs 5.3. I noticed that ifconfig displayed an odd virtual nic, and I wanted as little running on this machine as possible. I don't remember specifying that I wanted XEN installed. And on the old lowend machine that is powering this server, Virtualization was the last thing I wanted running on it. I did a google, discovered that the way to remove XEN completely (yum uninstall xen' only removed 'xen' but still, oddly, xen was running after a reboot. Talk about perplexing.
[Code]...
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Mar 14, 2010
I have Ubuntu 9.10 installed on an old Gateway desktop. It is running a system called Jira using a Tomcat web server, so 99% of the time access is thorugh the web browser. For the rest of the time I access it remotely using TightVNC. This works great so far but the system will not boot if I remove the screen (which I need to do since it is in the way). My question is this...
a. If I uninstall and reinstall using Ubuntu Server edition (32-bit) will the system boot without the screen?
b. Assuming the above will work - can I still access the machine directly using TightVNC (I presume not since that needs the graphics setup). If not, how do I connect to the machine remotely?
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Mar 31, 2010
I installed the latest version of Centos 5.4.It came with Xen version 3.0.2 I think.I am running it on a Dell R510. It supports hardware virtualization.I was able to virtualize Windows XP and Windows 2003 server on it by selecting the install from DVD option.I was having problems trying to get a PCI DekTek card seen by the virtualized Windows domains so I tried to upgrade XEN to 3.4.2.I used the repos available from Gitmo and it went easy.
The only problem is now that when I try to create a "New virtual host" it only allows me to use HTTP, FTP option and not the iso or DVD option. They are greyed out. I was wondering if anyone has had this problem and might know a work around for the Xen 3.4.2 problem. Perhaps a better location for the kernel or something.
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Jun 9, 2011
so I setup a raid ten system and I was wondering what that difference between the active and spare drives is ? if I have 4 active drives then 2 the two stripes are then mirrored right?
root@wolfden:~# cat /proc/mdstat
Personalities : [raid0] [raid10]
md1 : active raid10 sda2[0] sdd2[3] sdc2[2] sdb2[1]
[code]....
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Dec 4, 2009
I messed up my kvm virtualization, I think. I want to reload it. I think I'm supposed to type yum install aptName.Is that right?Also, I don't know what to put in for aptName. I can't find the package names on the Fedora site. Where did they hide it? Also, where do I download apts. I searched with Google and find all kinds of sites I don't trust.
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Mar 16, 2010
I would like to run Fedora 12 in virtualization mode on my PC. Primary OS is Win 7 Pro X64 Can I use the Windows Virtual PC for this or a third party VM software is better. Any recommendations? Which version of Fedora 12 should I use ? Can I use the Live CD version ?
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May 6, 2011
I would like to know or to retrieve a guide with all the steps to follow to do a hardware virtualization in a 1.5 TB-HDD in which i want to have 2 VM with VT-d (Hardware virtualization) one VM with Opensuse 11.4 x64 and the other with Windows 7 x64. The fact is that I want to run both VM's at same time and I need aid and tips with Xen 4.1 because all the Tutorials and guides that I've seen are from non updated versions (3.0, 2.2...). Do I need 3 partitions to virtualize by hardware (one for the host and the other 2 for the VM's)?? Which host OS do you recommend me?
Is it hard to configure Xen and anyway, how to do it? Basically I'm a novice use of linux and my doubts come up refering to Xen configuration, installation and Hardware virtualization selection ( Graphic Card Virtualization above all) because if I have to touch the BIOS settings tell me how, or the application sets it by itself? What I want to virtualize is a 7 Professional 64bits with most of the Disk space (at least 1 TB)for gaming&multimedia, and Opensuse 11.4 64bits. I'll use suse to work & test software.
Motherboard Gigabyte GA-H67A-UD3H
Processor: Intel Socket 1155 - Intel Core I5 2400 3.1Ghz
OpenSuse 11.4 (default DVD kernel version)
RAM memory Kingston ValueRAM 8 GB DDR3 1333 in modules of 2.
Hard drive 3.5 SATA - Samsung HD154UI 1.5TB SATA2 32MB MAESTRO.
I'm not searching for software virtualization/ full virtualization / paravirtualization. I'm searching for vt-x, vt-d & Graphic card optimizing with windows emulated environment. And do you recommend me to use another Xen version or software to achieve this goal?
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Jun 30, 2011
I am using Ubuntu 11.04, I also like Fedora, Opensuse and Mandriva. How can I run these Linuxes in Ubuntu with Virtualization? Which virtualization software is the best? Can I download it?
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Apr 3, 2009
i'm a familiar with Linux environement ( fedora 10 user ) and i got a project in a training where i have to create a cluster with two nodes where i have to set up a number of VMs that will run applications such as ( Samba, Ldap, Zimbra, ...) but i don't know how to virtualize on top of a cluster ! i would like to know how that can be done, and how is it possible to let the VMs get ressources ( RAM & CPU ) from the two nodes ??
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Sep 22, 2009
I chose virtualization when installing Centos 5.3. The kernel I got is 2.6.18-128.el5xen My plan is to use KVM, I disable xend service. I don't need a xen enabled kernel. How do I update the kernel to a non xen one?
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Apr 12, 2010
I was wondering if anyone can assist me. I am looking to build a server with Debian as the host. When I installed Debian (Squeeze) the default kernel was "2.6.32-3-trunk-amd64". When I tried to install 'Virtualbox' application, I got a failure because I didn't have the 'kernel-headers' installed on my machine. I noticed there are no specific header package the 'trunk' kernel I was using. I have a few questions so I guess I should begin:
Is it safe to remove the 'trunk' kernel and boot my system on just the regular 2.6.32-3-amd64 kernel? Is this OK or not recommended? Please explain whatever is the correct answer. This is my 1st time using a 'Trunk' kernel so I don't know the in's and out's of it.
If I am using Debian 'Testing' for virtualization via 'Vbox', is there a specific kernel I "should" be using?
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Jun 10, 2010
i'm currently using ferdora 13. would like to know how can i setup xen virtualization on it?
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Jan 12, 2011
I have an Opensuse 11.1 system I am using to host a single Opensuse 10.3 KVM guest. The hardware has 2 nics that i would like the host to bridge to the guest. I have done many Googles and have not had a lot of luck finding a set of docs that I can use to help me set this up for Opensuse.
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Jun 30, 2010
I am running Fedora on a VirtualBox. Sometimes to allow for performing some real hardware testing, I need to run my development environment on a physical machine. So I need the hard disk of the virtual machine (the .vdi file) to be interchangeably working on both the virtual machine itself and my physical PC by booting a bootable image, mounting the vdi file, and then chrooting to it.
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Sep 11, 2011
One of the things holding me back from building a new system with nothing but Linux is the vague possibility that that I might need to use some proprietary program that only works on Wind'ohs in the future. So far it has been easy to keep dual boot systems around, but a new system will be > 4 Gb of RAM of course, so I can't just install one of my copies of Win XP on it. But buying a new 64-bit version of Wind'ohs for ~$200 seems a waste.Is it now possible to run XP in a "virtual" machine under Debian? More importantly, is it possible to install XP completely from within the virtual machine so it never sees the > 4 Gb or RAM and freaks out? What sort of hardware is required to do something like this? I presume a CPU with certain special capabilities is essential, but wouldn't those special instructions (whatever they are) be pretty standard now? Would the virtual XP install need its own partition?
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Mar 26, 2010
I'm installing a new server after this weekend, and it musth have both windows server 2008 r2 and linux (probably ubuntu) running, but I'm wondering which one of them I should run virtual. Windows will be used mostly for rdp and for serving asp.net webpages, linux will host some django-applications and a postgreSQL server etc.
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