1
vote
0answers
27 views

lxc command always “get error 4 in libc-2.12.so”

I've tried several time to find out why suddenly my LXC not working, I use dmesg | tail it shows: lxc-start[2777]: segfault at fffffffffffffffc ip 000000390347b82c sp 00007fffd9046c18 error 4 in ...
0
votes
0answers
42 views

CentOS Host KVM Virtual Machine running a Windows VM - No internet access

I've installed a KVM virtual machine on a CentOS host using libvirt. I've also set up a bridged connection from the interface en0:4 running on IP x.x.x.15 to br0. (The IP is a public one). Running ...
0
votes
1answer
14k views

CentOS 7 Minimal Install doesn't comes with networks scripts? Which version to use then? [closed]

I'm installing CentOS 7 as virtual machine but I'm having some problems related to network. As image shows I select Minimal Install for later add trough YUM any packages I want as for example: PHP, ...
0
votes
0answers
77 views

Kickstart “Unable to download kickstart file. Check parameter”

So I'm using 2 VMs (CentOS 6.0), one acting as a build server, the other is a new server I'm trying to build with a kickstart. When I start the VM for the new server (with the build server already ...
1
vote
0answers
121 views

Hypervisor The operation cannot be performed while the object is in it's current state

I attempted to reboot one of my VMs in the Hyper-V Manager. It's a Centos VM and all of my other centos machines are behaving as they should although I can't get this particular one to boot. I'm a ...
1
vote
1answer
94 views

5-7 second latency between Apache server and MySQL server when website calls on database server

I am currently running a virtualized environment for my web and db server. When I access the web server or the MySQL server individually, they are both fast. I also have websites running on the web ...
1
vote
0answers
48 views

How to use kexec to do a live upgrade of hotswap ram on a CentOS vm image?

Just as the question states, is there a way and what's the best method todo a live ram upgrade with kexec?
1
vote
0answers
477 views

CentOS 6.5 Xen Virtual Machine Issue 'this function is not supported by the connection driver'

I am trying to segment my system into a number of virtual machines but just cant seem to get this to work. I think I am close but not quite there. I have install xen, virsh, xl etc and I am using ...
0
votes
2answers
194 views

“Insufficient Resources” general system error when starting ESXi VM through Vsphere client

I'm trying to set up a CentOS installation on my ESXi host using VMware VSphere client, and despite my efforts, I continually receive an error. After creating the VM and attempting to start it for the ...
1
vote
1answer
3k views

How to change boot device on vm installed on Citrix Xen Server to DVD

I have installed Centos 6 on my new Xen Server (XenServer release 6.2.0-70446c). Everything went smooth. System is working fine but now I want to change boot device on that VM to boot from DVD (iso ...
1
vote
1answer
4k views

Unable to ping between host machines and guest vms running on Vmware

In order to learn a bit about system administration, I've installed a Centos vm using Vmware on my local machine running Windows 7. Everything seems to be working fine since I can access the internet ...
1
vote
2answers
514 views

Install an Oracle DB in a linux VM

I am trying to set up an Oracle database server (at the moment just for testing purposes) in a virtual machine. The setup I'm using: VirtualBox Network adapter in NAT mode (redirecting ports ...
-1
votes
2answers
755 views

how do I install pdsh on centos 6? [closed]

I'm following a tutorial on how to configure a centos machine to be a node in a hadoop cluster for HortonWorks. I'm doing this on a virtual machine on VirtualBox. Sadly, since I am a linux beginner, ...
-1
votes
1answer
129 views

openvz containers optimization

i am trying to optimize 14 containers on 64 G.B ram , 16 Core processor based on Centos 5.9 Final 64 Bit Distribution the load average of the server up to 300 this is my memory stats # vzmemcheck ...
1
vote
2answers
761 views

Ovirt doesn't create live snapshot

I installed oVirt. If I suspent VM and create snapshot it's ok, but if I try to do live snapshot on the stage "Finalizing" ovirt have fail. Ovirt, VDSM and NFS storages are on the same local server. ...
0
votes
2answers
1k views

kvm: 23090: cpu0 unhandled wrmsr 0x391 data 2000000f

I installed kvm on CentOS 6.4. I created virtual server CentOS_test on it. When I start CEntOS_test I have message: kvm: 23090: cpu0 unhandled wrmsr 0x391 data 2000000f What is it mean? CentOS_test ...
1
vote
2answers
1k views

Ganeti : Installing Centos/RHEL Instance

I have installed Ganeti on Centos 6.3 with DRBD and have added couple of nodes. However, now I am facing next challenge of installing a Centos Guest/Instance on top of it. I tried using ...
4
votes
2answers
1k views

Can I safely increase the number of processors on a VM?

I have several Windows 7, CentOS, and Ubuntu virtual machines running within a VMWare ESXi server. To get better performance while building on them via Jenkins, I would like to increase their number ...
1
vote
2answers
451 views

add space to virtual disk on vmware

I have a VMWare Server 3.5 system with 2 VMs. On one powered on vm I changed the disk size from 1TB to 1,5TB. But the vm didn't see any new unallocated space so that I reboot twice the server. But ...
2
votes
2answers
340 views

Install CentOS on SCSI hard drive under Hyper-V

How can I install Centos 6 on SCSI hard drive under Hyper-V? I added a IDE drive to boot from but CentOS doesn't recognize SCSI drive during install. How can I fix this please?
1
vote
2answers
356 views

Minimizing Disk Space for CentOS & Vagrant VM Install

I'm working on building a Base VM for use with a Vagrant, and/or Puppet. I've done the minimal CentOS 6.3 install 32 bit. It's still a size of approx 800 mb. From what I've found out there people ...
0
votes
1answer
250 views

KVM low network speed

I have a networking problem with KVM. There is only one VM on the server and port speed is 100 megabits per second But maximum download rate is about 1 megabytes per second and expected to be 10mb. ...
0
votes
2answers
622 views

Share CPU between two KVM VPS on a dedicated server

how can I share CPU between two KVM VPS on a dedicated server? assume that we have 8-core CPU on a dedicated server to get maximum performance for two VPS, should I assign 8 cores to each one of ...
0
votes
0answers
144 views

KVM VPS doesn't reply to all ping requests and loading slow

I have a KVM VPS with qcow2 + IDE Bus + Not Preallocated Disk and default network interface (no virtio). site is loading so slow and about 40% of ping replys are Time out. I have CSF installed and ...
1
vote
2answers
3k views

Can not boot CentOS VM using VirtIO in KVM

I converted qcow2 image to raw and changed I/O bus to VirtIO for a VM. now I can't boot that VM. I Installed VirtIO driver with following command: mkinitrd --with virtio_pci --with virtio_blk -f ...
1
vote
1answer
759 views

Share IP from Xen (XCP) Dom0 to DomU

The situation: Xen Cloud Platform installed on a dedicated server. It is assigned a batch of IPs. I want to create a CentOS 6 VM (domU) that is running a WHM/Cpanel install, and has access to the ...
1
vote
1answer
2k views

Can't ping from inside to outside; misconfigured DNS

I have configured my network inteface according to this guide. And now I can ping to server from my computer but I can't ping from server to outside world. Note: I can ping 8.8.8.8 Can anyone ...
0
votes
1answer
432 views

virt-manager cannot identify machine

last time I had virt-manager + Desktop on my centos server everything was fine then I removed desktop for more security. and after a while I installed it again and now when I open virt-manager it ...
1
vote
2answers
471 views

virt-manager doesn't show list of local KVMs but virsh does

When I open virt-manager GUI it doesn't show list of KVMs but virsh does. how can fix it?
1
vote
1answer
612 views

Are intermittently slow disk read speeds ever caused by the OS itself?

I'm noticing intermittently slow disk read/write speeds on my CenTOS 5.x VM. Sometimes hdparm will report: /dev/sda3: Timing buffered disk reads: 6 MB in 3.03 seconds = 2.04 MB/sec Other ...
0
votes
1answer
541 views

Centos VM serving multiple public IP: how to configure network interface?

I have a Centos 5.6 VM (vSphere client) already responding to two different public IPs on eth0 and eth0:1 and I'm trying to add eth0:2. I copied the eth0 config file and restarted the network service. ...
0
votes
1answer
306 views

Running OpenVZ virtual servers within a Xen XCP vritual server? Bad practice?

I have a 1 server with 8GB RAM and 2xQuadcore Processors. It currently has the Xen XCP installed on it, and centos6.2 x64 running on a virtual machine. I have a server control panel software that I ...
1
vote
4answers
7k views

Import existing VM into Openstack/Cloudstack

We're currently running our infrastructure with XEN + CentOS and are thinking to make the move to Ubuntu (Both as Host and Guest) + KVM. Our objective is to, at a later stage, create a private cloud ...
-2
votes
1answer
126 views

Xen hypervisor maximum domu support [closed]

Can anyone please let me know that what are Xen Hypervisor 4.x limitations. How many virtual machines i can create with what memory and cpu?
0
votes
1answer
393 views

How to access partitions inside a logical volume from the host machine?

On a Virtual Machine Host Server I have a logical volume, /dev/my_volume_group/some_disk. The Logical volume "some_disk" has two partitions on it that were created by the guest machine. A swap and an ...
1
vote
1answer
277 views

FVD format on qemu/KVM

How can I install this format in Centos KVM?. Is it included in latest qemu versions? Reference in qemu wiki: http://wiki.qemu.org/Features/FVD Thanks in advice
0
votes
3answers
2k views

Cannot change PostgreSQL port

I run Postgresql 8.4 as a service on a CentOS 6.2 server. I set port = 21444 and listen_addresses = '*' in /var/lib/pgsql/data/postgresql.conf and I changed 5432 to 21444 in postmaster.opts and ...
1
vote
5answers
6k views

How do I configure networking on CentOS 6 running on hyper-v?

I'm not using legacy adapters, and i've installed Linux Integration Components 3.2. THe problem i'm facing is that the command 'setup' or 'system-config-network' doesn't list any network interfaces. ...
-1
votes
1answer
169 views

Which simple server virtualization solution to use? [closed]

For one part of our hosting platform we are currently using VMware Server 2 to create two virtual machines on one physical machine. One VM is used for hosting of small websites, the other VM is used ...
2
votes
2answers
2k views

qemu-kvm/virsh: No network connectivity whilst using bridged networking

I'm having an issue with performing virtualisation via libvirt/qemu-kvm, in which my set up for bridged networking doesn't appear to be working correctly. I've followed every tutorial I can find and ...
3
votes
1answer
4k views

Does CentOS 6 have Xen-compatible Kernel?

I would to try to convert my VirtualBox image and upload to Amazon EC2, following this tutorial: ...
2
votes
4answers
226 views

Virtualize server environment for development?

We're in the planning/development stage for our new platform and with everything separated out we'll need to setup between 9 to 16 servers, a load balancer, 2 or 3 hardware firewalls, and a VPN. ...
2
votes
1answer
114 views

Strange CPU usage on Windows Server 2003 vs. CentOS5.4

I have two Virtual PCs running Windows Server 2003 and CentOS 5.4 on a host machine. I use a java server on both of them. I copied the java server's files from the host machine on to both of the ...
1
vote
1answer
341 views

centOS server ready ISO download

I want to install CentOS 5.6 Final 32bit into a virtual server i have access to. I do not want to download the full DVD -- but I am searching if there is a MINIMAL version available somewhere. What ...
1
vote
1answer
392 views

help to optimize container

I have an openvz node with only one container (Cpanel server). Yesterday I had many memories issues: Unable to fork: Cannot allocate memory Can someone help me to optimize my node setting ? I ...
1
vote
2answers
518 views

Centos 6.0 + Xen

So now that Xen is no more in Centos' repositories, should I still use it or migrate to KVM? I have to say that I am not very inspired by KVM at the moment and I've gotten pretty familiar with XEN ...
0
votes
2answers
71 views

Running a virtual machine on a CentOS server

I need to install a guest virtual machine on top of a remote CentOS server host. I can access my host machine through ssh terminal only and I prefer using CentOS native packages only. My guest VM is ...
3
votes
1answer
1k views

How to limit memory for VE on openvz

I need to configure only one vps in a openvz node. The node will have only one vps. I need help to configure the memory limits correctly. The node have 4GB memory with 4GB swap. I would like to ...
1
vote
1answer
175 views

openvz node with only one vps

I have an openvz server with 2Gb ram and would like to configure a vps for use all server resources (no swap). I run: vzsplit -n 1 -f vps1 -s 0 and have this setup: Configuration file generated by ...
1
vote
2answers
425 views

Netinstalling CentOS if the gateway is in a different subnet

I have a KVM host (A) running a virtual machine (B). They each have their own external IP address and the networking is setup using bridging between eth0 and br0 on A. B uses eth0, with A being the ...