xen

Centos 5 virtual machine (32 bit) installation on Xen

I dnt know how to install centos in xen virtual machine. Any one have some installation step send it to me ? Thanks in advance ...

Home workstation cloud computing solution on Ubuntu

Hello everyone! I want to make a cloud computing testing environment on my in-house network. I'm using Ubuntu (just to work on; i don't want to watch Gentoo compile screens all time:) and I plan to make an Eucalyptus installation for a cloud platform. I want to get the most of my Core2Quad and Core2Duo machines:) What I need a cloud for...

How to Compress or write zero's /dev/zero to a swap file?

We have a few linux based (Centos) virtual machines which are to be used as distributable virtual appliances. We want to be able to compress them as much as possible for distribution ( via tar.gz, zip, etc). We've removed all unnecessary files (.log's, /tmp/*, /var/log/, etc) and have written /dev/zero to the free space on the disk....

Can I set noatime for my XEN guest OS partition? Will it work?

I have a VPS in cloud environment based on XEN Virtualization platform. /etc/fstab looks like that: LABEL=PRGMRDISK1 / ext3 errors=remount-ro 0 0 As far as I know IO can pretty easily become a bottleneck if some other VPS neighbor will use it intensively(IO bandwidth is a shared resource for multiple guest VPS). ...

Is there an OS command I can run to determine if running inside a Xen based virtual machine

Hi, Is there an OS command I can run from within a Xen based virtual machine to tell me that it is a virtual box rather than a physical box - I heard that the kernel had some self awareness smarts about it. e.g. like an extra column in "ps" output or something? [I know vmstat provides the "st" column but I have seen this on physical hos...

Problem installing j2re-1_4_2_19-linux-i586.bin on 2.6.32-5-xen-amd64

Hi there, i got a little problem when i try to install the j2re on my linux-xen.... it tell me this: ./j2re-1_4_2_19-linux-i586.bin: line 383: ./install.sfx.5488: No such file or directory. Ive checked out some forums and nothing... anyone has any idea?¿ Thanks ...

How to setup a Xen domU with multiple subnets on one interface?

I have a host (host1.example.com) with the following IPs: IP: 10.0.0.6 Subnet: 255.255.255.192 Gateway: 10.0.0.1 Broadcast: 10.0.0.63 IP: 10.0.1.9 Subnet: 255.255.255.248 Broadcast: 10.0.1.15 How to setup host1.example.com to host dom0 on both subnets? ...

Hypervisors: is arbitrary code execution on the guest possible?

Hi all, I've been reading into virtualization security and came across Blue Pill, a malicious thin hypervisor (project website is down, archived version here: http://web.archive.org/web/20080418123748/http://www.bluepillproject.org/). My question is: could a custom malicious hypervisor modify execution flow, inject and execute arbitrar...

The state of XEN vs KVM for inhouse virtual server farm like live farm

Hello, so we have a life server Farm, conventional stuff not virtualized. This is to stay that way for the time beeing. The servers we are talking about are: Loadbalancer, DB master, DB Slaves (2x), Webservers (2x), CMS server. All in all 7 servers per farm. We want to have one to many rather exact "copies" of the life structure for in...

What is the best Linux distro for System Programming?

I want to work with low level system programming and virtualization for my research. I tried Ubuntu 10.04 + Xen 4.0.0 but they weren't going quite well right from the installation. One of my friends suggested to take up Gentoo. Any more suggestions? ...

Problems in compiling Xen on CentOS

Hi All, I am getting the below error while compiling Xen on CentOS make -C firmware install make[4]: Entering directory `/home/satyajeet/Important_Softwares/xen-4.0.1/tools/firmware' Require dev86 rpm or bin86 & bcc debs version >= 0.16.14 to build firmware! (visit http://www.debath.co.uk/dev86/ for more information) make[4]: ...

With Appscale, does it mean I can deploy GAE applications on Xen VPS hosts without worrying about server maintenance?

I'm pretty new to Appscale and GAE. Say I have a web application on GAE (offers hassle-free maintenance on server security etc), if I move the application to a Xen VPS host using Appscale, do I still enjoy hassle-free maintenance (since Appscale is based on GAE)? ...

Automatic provisioning of xen in private cloud

I am setting up private cloud for some experiments using xen as the hosting system. But I am faced with a problem for which I can't seem to get solutions. I have to do some kind of automatic provisioning of VMs given the server load. Eg: if server of type A gets to lets say 60% load the cloud should spawn off another vm instance of the ...

Getting the IO count

Hi, I am using xen hypervisor. I am trying to get the IO count of the VMs running on top of the xen hypervisor. Can someone suggest me some way or tool to get the IO count ? I tried using xenmon and virt-top. Virt-top doesnt give any value and xenmon always shows 0. Any suggestions to get the number of read or write calls made by a VM ...

xen randomly causes iscsi mounts to drop, crashing all VMs

I inherited a xen server that is setup to have all the VM images hosted on an iSCSI mounted NAS array. We been experiencing a random (about every 2-3 days) issue where xen would crash all the VMs, leaving nothing but the Domain0 running. What appears to be happening is something causes the iSCI mount to hiccup. Running "vgchange -a y"...

Why does MAP_GROWSDOWN cause SIGBUS errors after upgrading to Centos 5.5?

I was upgrading the OS on one of our build from Centos 5.3 32bit to Centos 5.5 32bit. After doing the package update I rebooted, checked out a clean copy of the source, built and ran the unit tests. All unit tests which rely on our MemMap base class began to fail. The crash occurs when we attempt to set the value of the guard page aft...