Search Results

Search found 559 results on 23 pages for 'kvm'.

Page 17/23 | < Previous Page | 13 14 15 16 17 18 19 20 21 22 23  | Next Page >

  • Why can I not get a WDS-originated PXE boot to progress past the first file download?

    - by Jeff Shattock
    I'm trying to work out an automated Windows install process, and thought I'd give WDS a look. After some promising initial progress, I seem to have hit a wall. I imported the boot and install WIMs, and created the capture WIM successfully. However, whenever I try to PXE boot the reference machine against the WDS server, it kinda craps out. It finds the server and downloads WDSNBP.COM successfully, and then gives the message "TFTP download failed." According to WireShark, the only communication between the WDS box and the client box is the successful TFTP request and download of boot\x86\WDSNBP.COM. No further requests are sent. The WDS log on the server shows the same thing, one successful download and no more activity. I've tried every combination of the following, with exactly zero change in behaviour: Win Server 2008R2 vs 2012 vs 2012R2 WDS virtualized on KVM, ESXi, VirtualBox, VMWare Workstation Client virtualized on KVM, ESXi, VirtualBox, VMWare Workstation Every network adaptor type offered by the virtualization platforms. "Actual" network vs isolated, virtual network. MS DHCP server vs Linux isc-dhcp-server Joined to a domain vs Stand-alone I tried changing the boot filename in DHCP to pxeboot.com instead, and it has no problem downloading that file instead, but it then crabs about Boot\BCD being corrupted. Also, with 2012, it doesnt appear that WDSNBP.com does the architecture detection, or at least does'nt report that it did. 2008 reports that it found x64, and then errors. I find myself out of things to check, and I dont see anything immediately wrong. Where do I go from here? WDS server is at 192.168.1.50, DHCP/DNS at 192.168.1.7. Console of the client computer after the boot: MAC: 52:54:00:28:94:0E UUID: blah blah Searching for server (DHCP)..... Me: 192.168.1.155, DHCP: 192.168.1.7, Gateway 192.168.1.1 Loading 192.168.1.50:boot\x86\wdsnbp.com ...(PXE).................done Downloaded WDSNCP... TFPT download failed Interesting parts of /etc/dhcp/dhcpd.conf on the Linux DHCP server: allow booting; allow bootp; option option-60 code 60 = string; option option-66 code 66 = string; option option-67 code 67 = string; subnet 192.168.1.0 netmask 255.255.255.0 { range 192.168.1.110 192.168.1.253; next-server 192.168.1.50; option tftp-server-name "192.168.1.50"; option option-60 "PXEClient"; filename "boot\\x86\\wdsnbp.com"; option bootfile-name "boot\\x86\\wdsnbp.com"; }

    Read the article

  • openstack, bridging, netfilter and dnat

    - by Craig Sanders
    In a recent upgrade (from Openstack Diablo on Ubuntu Lucid to Openstack Essex on Ubuntu Precise), we found that DNS packets were frequently (almost always) dropped on the bridge interface (br100). For our compute-node hosts, that's a Mellanox MT26428 using the mlx4_en driver module. We've found two workarounds for this: Use an old lucid kernel (e.g. 2.6.32-41-generic). This causes other problems, in particular the lack of cgroups and the old version of the kvm and kvm_amd modules (we suspect the kvm module version is the source of a bug we're seeing where occasionally a VM will use 100% CPU). We've been running with this for the last few months, but can't stay here forever. With the newer Ubuntu Precise kernels (3.2.x), we've found that if we use sysctl to disable netfilter on bridge (see sysctl settings below) that DNS started working perfectly again. We thought this was the solution to our problem until we realised that turning off netfilter on the bridge interface will, of course, mean that the DNAT rule to redirect VM requests for the nova-api-metadata server (i.e. redirect packets destined for 169.254.169.254:80 to compute-node's-IP:8775) will be completely bypassed. Long-story short: with 3.x kernels, we can have reliable networking and broken metadata service or we can have broken networking and a metadata service that would work fine if there were any VMs to service. We haven't yet found a way to have both. Anyone seen this problem or anything like it before? got a fix? or a pointer in the right direction? Our suspicion is that it's specific to the Mellanox driver, but we're not sure of that (we've tried several different versions of the mlx4_en driver, starting with the version built-in to the 3.2.x kernels all the way up to the latest 1.5.8.3 driver from the mellanox web site. The mlx4_en driver in the 3.5.x kernel from Quantal doesn't work at all) BTW, our compute nodes have supermicro H8DGT motherboards with built-in mellanox NIC: 02:00.0 InfiniBand: Mellanox Technologies MT26428 [ConnectX VPI PCIe 2.0 5GT/s - IB QDR / 10GigE] (rev b0) we're not using the other two NICs in the system, only the Mellanox and the IPMI card are connected. Bridge netfilter sysctl settings: net.bridge.bridge-nf-call-arptables = 0 net.bridge.bridge-nf-call-iptables = 0 net.bridge.bridge-nf-call-ip6tables = 0 Since discovering this bridge-nf sysctl workaround, we've found a few pages on the net recommending exactly this (including Openstack's latest network troubleshooting page and a launchpad bug report that linked to this blog-post that has a great description of the problem and the solution)....it's easier to find stuff when you know what to search for :), but we haven't found anything on the DNAT issue that it causes.

    Read the article

  • Qemu not installed on ubuntu with xen 4.0.1 ?

    - by Disco
    I'm kinda confused. I've installed Xen on a fresh/clean ubuntu 10.10 server (x64) using : hg clone xen-4.0-testing.hg make world make install-kernels Trying to launch qemu; first "not found" Then I installed from source (from tarballs at qemu.org) But then qemu complains about not finding /dev/kvm Am I missing something here ? I thought that qemu was part of xen install (at least it was from 3.x series). All i have is qemu-img-xen and qemu-nbd-xen.

    Read the article

  • Network and Server Management Tools

    - by jessieE
    We are building a farm of test servers. Currently we have 8 servers. We are planning to use the servers to test the following Mysql Cluster Xen or KVM virtualization Heartbeat/Pacemaker/DRDB What tools do experienced sysads use for: Initial installation of operating system( installing centos 5 or ubuntu server manually 8 times seems like a tedious task that just begs for automation) Centralized Configuration Management and Software Updates for Host and possibly Guest(virtualized) servers Hardware, Services and Network Monitoring

    Read the article

  • How to increase acpiphp slots?

    - by Eil
    Hi, Oh RHEL 5.5, there are 31 ACPI PCI hotplug slots by default: acpiphp: Slot [1] registered ... acpiphp: Slot [31] registered Is there a way to increase this number? I haven't been able to find an argument to supply to modprobe, or a sysctl knob to tweak, but I know there must be ways to get more slots based on some Google sleuthing. (For the curious, this is just preliminary experimentation to see how many virtual disks I can hot-add to a running KVM guest.)

    Read the article

  • Keyboard repeat on Input Director slave machine.

    - by ProfKaos
    I'm using Input Director as a software KVM to control my laptop from my desktop, and all is almost OK with the setup. However, key-presses on the master keyboard seem to repeat very easily on the slave, and it is close to impossible to type a word on the slave without getting repeated characters. I typed the word 'repeat' on the master keyboard and my editor on the slave captured the characters 'repeeaatt'. Both machines are Windows 7.

    Read the article

  • How to disable or tune filesystem cache sharing for OpenVZ?

    - by gertvdijk
    For OpenVZ, an example of container-based virtualization, it seems that host and all guests are sharing the filesystem cache. This sounds paradoxical when talking about virtualization, but this is actually a feature of OpenVZ. It makes sense too. Because only one kernel is running, it's possible to benefit from sharing the same pages of filesystem cache in memory. And while it sounds beneficial, I think a set up here actually suffers in performance from it. Here's why I think why: my machines aren't actually sharing any files on disk so I can't benefit from this feature in OpenVZ. Several OpenVZ machines are running MySQL with MyISAM tables. MyISAM relies on the system's filesystem cache for caching of data files, unlike InnoDB's buffer pool. Also some virtual machines are known to do heavy and large I/O operations on the same filesystem in the host. For example, when running cat *.MYD > /dev/null on some large database in one machine, I saw the filesystem cache lowering in another, monitored by htop. This essentially flushes all the useful filesystem cache in guests (FIFO) and so it flushes the MySQL caches in the guests. Now users are complaining that MySQL is very slow. And it is. Some simple SELECT queries take several seconds on times disk I/O is heavily used by other machines. So, simply put: Is there a way to avoid filesystem cache being wiped out by other virtual machines in container-based virtualization? Some thoughts: Choosing algorithm for flushing filesystem cache in the kernel. (possible? how?) Reserving a certain amount of pages for a single VM. (seems no option for filesystem cache type of pages that reading man vzctl) Will running MySQL on another filesystem get me anywhere? If not, I think my alternatives are: Use KVM for MySQL-MyISAM running VMs. KVM actually assigns memory to the VM and does not allow swapping out caches unless using a balloon driver. Move to InnoDB and tune the buffer pools, dirty pages, etc. This is now considered to be 'nice to have' on the long-term as not everyone responsible for administration of the system understands InnoDB. more suggestions welcome. System software: Proxmox (now 1.9, could be upgraded to 2.x). One big LV assigned for the VMs.

    Read the article

  • Use vmconnect from another AD domain

    - by user1459015
    I try to connect remotly to the KVM (console) of an Hyper-V Virtual Machine using vmconnect.exe but I'm dealing with some kind of a problem : When I connect from a computer within the same AD of my Hyper-V Host, everything work fine but when I try to connect from a computer not within the same AD, wmconnect say that my RCP services is not running on the host The problem is that it doesn't ask me for any credentials and so, i can't authenticate in the AD Does someone have any clues ?

    Read the article

  • How to increase acpiphp slots?

    - by Eil
    Oh RHEL 5.5, there are 31 ACPI PCI hotplug slots by default: acpiphp: Slot [1] registered ... acpiphp: Slot [31] registered Is there a way to increase this number? I haven't been able to find an argument to supply to modprobe, or a sysctl knob to tweak, but I know there must be ways to get more slots based on some Google sleuthing. (For the curious, this is just preliminary experimentation to see how many virtual disks I can hot-add to a running KVM guest.)

    Read the article

  • Linux missing disk space

    - by cpt.Buggy
    I have KVM vps with strange disk usage: # df -h Filesystem Size Used Avail Use% Mounted on /dev/sdb 493G 1.2G 466G 1% / tmpfs 4.0G 0 4.0G 0% /dev/shm /dev/sda1 96M 41M 51M 45% /boot # du -sh / du: cannot access `/proc/1633/task/1633/fd/4': No such file or directory du: cannot access `/proc/1633/task/1633/fdinfo/4': No such file or directory du: cannot access `/proc/1633/fd/4': No such file or directory du: cannot access `/proc/1633/fdinfo/4': No such file or directory 1021M / How could it be? Where are ~20G of free space?

    Read the article

  • Can't create LVM due to: not found (or ignored by filtering)

    - by James
    I'm planning to use LVM for KVM, and when I try to create a VG it fails, so how can I create my VG and LV ? Thanks [root@server ~]# vgcreate virtual-machines /dev/sda Device /dev/sda not found (or ignored by filtering). Unable to add physical volume '/dev/sda' to volume group 'virtual-machines'. [root@server ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda3 2.0T 929G 976G 49% / tmpfs 3.9G 124K 3.9G 1% /dev/shm /dev/sda1 194M 57M 128M 31% /boot [root@server ~]# pvscan No matching physical volumes found

    Read the article

  • Prevent being locked out [duplicate]

    - by Nick
    This question already has an answer here: How do you test iptables rules to prevent remote lockout and check matches? 3 answers When you are configuring iptables or ssh over ssh and the data center is thousands of kilometers away(and getting someone there to plug in a KVM is hard) what are some standard practices to prevent locking yourself out?

    Read the article

  • /sbin/getty process causing 100% CPU utilization

    - by scrrr
    I have an instance of Ubuntu 12.04 LTS (GNU/Linux 3.2.0-25-virtual i686) running as a KVM-VM on a host-machine that runs one more VM beside it. I deploy a Ruby on Rails application using the Capistrano deployment-gem. However, if I deploy twice in a row in a short time, the CPU usage jumps to 100% because of the /sbin/getty process. How can this be? I believe getty is a rather simple program that passes a login-name from a terminal to a login-process. Also: In my Capfile (Capistrano configuration file) I am running certain commands after the Rails application is deployed including a call to sudo /sbin/restart <APPNAME> which is an upstart task. Could this be related somehow? I can always kill the getty process and the problem is gone until the next deployment, but I would rather understand and fix the problem. Any help is appreciated. Attached is a screenshot of my problem.

    Read the article

  • Prevent service from starting

    - by Evan Plaice
    So, I do Arduino development on my system to program arduinos using the FTDI USB programming interface (if you have no idea what this means don't worry). The issue arises because the FTDI interface uses tty to communicate and it conflicts with one of the default ubuntu services. The default service in question is called brltty (which enables braille accessibility for people with impaired vision). Considering that I don't have any particular use for this service and it's annoying to stop it manually (using 'service brltty stop') after I restart my system... Where would I configure this (or any) service to prevent it from loading on startup? Note: I also have this issue with qemu-kvm conflicting with virtualbox.

    Read the article

  • Why the Enter key in a Mac keyboard is mapped to Level?

    - by Anentropic
    Just installing Ubuntu for the first time, glad to ditch Win 7. I have a KVM switch and also a Mac, hence I'm using a Mac keyboard (the full size alu one) Everything's pretty cool. First thing I wondered is why the numeric keypad doesn't work? Oh, I have to find the num lock key (which should default to on, sensibly, no?) which isn't labelled as such on a Mac keyboard. Ok no problem. Then for some reason the Enter key on the keypad doesn't work still. Check the keyboard layout (set to 'English UK Macintosh')... inspecting the layout the Enter key is mapped to something called 'Level' - WTF is 'Level'? Everything else about the keyboard works great ie the £ $ # @ " are all perfect, volume control works as expected... why this weird key mapping on the Enter key? More importantly... how do I change it to work as an Enter key ?

    Read the article

  • while upgrading a virtual machine do I need to install a bootloader

    - by Bond
    I have a virtualization server which is having a few virtual machines running at top of it. All this was done using Ubuntu server edition with KVM and using virt-manager on SSH connection. These VMs are Lucid 10.04 64 bit Vms. When I upgrade them via apt-get upgrade on an SSH connection in between the ncurses screen, it asks me if it should install a bootloader and to select Yes or No for it. I have no clue what should I select here and I cancel the upgrade.Since it is a production machine I can not specify any thing like this. So let me know what will be a correct.

    Read the article

  • How do I install Ubuntu to a USB key?

    - by badp
    If you are hurrying to reply, System ? Administration ? StartUp Disk Creator -- no, that's not what I'm talking about. I want to try Ubuntu 11.04's Unity without touching my existing Ubuntu install. To do this, I need to install the nVidia drivers first (sigh). To do this, I need changes to persist a reboot. To do this, I need to really install Ubuntu on a USB key. How do you do that? What I tried I tried to make a USB key from Testdrive, then boot from it, then choose "Install Ubuntu." The installer refused to install to the installation media itself. I tried, from my installed copy of Ubuntu: sudo kvm /dev/sdb --cdrom .cache/testdrive/iso/ubuntu_natty-desktop-i386.iso ...but the installer didn't detect the disk properly.

    Read the article

  • GlassFish 4.0 Virtualization Progress - VirtualBox

    - by alexismp
    Wouldn't it be nice if you could spawn GlassFish instances as VirtualBox virtual machines? Well now with early versions of GlassFish 4.0 you can! This page on the GlassFish Wiki documents the steps to get this to work. It walks you through the various VirtualBox (network and services) and GlassFish configuration steps including the creation of VDI templates (typically JeOS images) to finally create a virtual machine on the fly, as part of the typical GlassFish deployment process. The more general virtualization support in GlassFish is discussed in this other Wiki page. Earlier demonstrations of GlassFish.next prototypes or early milestone builds showed support for KVM, "laptop mode" and OVM as well as community involvement from Serli, speaking of which this slide-deck is a good summary of what we're trying to achieve in the GlassFish 4.0 IMS (IaaS Management Service).

    Read the article

  • How do I reduce package content on a custom install CD?

    - by Pete Ashdown
    I normally do all my installs via PXE server, but I'm building a custom CD for kvm installs that are not on the same vlan as my PXE server. I would prefer this CD was as small as possible and it fetched packages from the network like netinstall mini.iso CD does, but netinstall doesn't mount /cdrom like the server install CD does. I need the cdrom for preseed. I've got my custom server install CD working, but it is still ~700MB. Trying to modify "dists/lucid/main/binary-amd64/Packages.gz" gives me no love as it complains that I've got a corrupt Packages.gz no matter what I do. I'd rather the preseeded mirror was used rather than CD once it gets the cdrom setup. Any ideas?

    Read the article

  • dpkg --set-selections from 11.10 on 12.04LTS

    - by Vixxo
    I have to move a server to a different DC in a different country. The server is currently running 11.10, but the new fresh installed OS will be 12.04. The hardware of both is completely different. In order to install the same packages that the server currently uses, I am thinking of exporting all packages to a list and then run this list on the new machine. I will after that proceed with transferring the configuration files for the LAMP stack. My question is if this will work, or if there will be a problem because of the differences in the versions of the OS? What is the correct way to do it? PS. I have no access to KVM to reload the OS as an image, so this would not be an option.

    Read the article

  • virt-manager not installing

    - by Registered User
    I am trying to install virt-manager on 11.10 on 64 bit machine sudo aptitude install virt-manager here is where it stopped the install Processing triggers for python-support ... Errors were encountered while processing: libvirt-bin E: Sub-process /usr/bin/dpkg returned an error code (1) A package failed to install. Trying to recover: Setting up libvirt-bin (0.9.2-4ubuntu15) ... useradd: cannot lock /etc/passwd; try again later. adduser: `/usr/sbin/useradd -d /var/lib/libvirt -g kvm -s /bin/false -u 118 libvirt-qemu' returned error code 1. Exiting. dpkg: error processing libvirt-bin (--configure): subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: libvirt-bin What should be done in this case to resolve it?

    Read the article

  • Upgraded to Ubuntu 12.04--keyboard & mouse no longer work--system down!

    - by Mackey Morgan
    I upgraded from Ubuntu 11 to 12.04, today, and everything seemed to go smoothly up to, and including the reboot. However, I now find that my mouse and keyboard no longer function, so I cannot login or otherwise use my computer. I have read other posts on this topic, but most of the answers seem to require the use of a keyboard to implement the solution--and I can't use my keyboard! I downloaded a 12.04 LiveCD and tried booting from it, but I have the same issue with that--no keyboard! My systems is a Lenovo with an AMD64 dual processor, and my keyboard and mouse are USB attached and shared with two other Windows PCs via a KVM switch (so I no the keyboard and mouse work!). I would appreciate some hints about how to make this PC usable, again. Thanks!

    Read the article

  • appearance incomplete

    - by user288986
    I'm using 14:04 which is pretty nice. Something wionders me: if I open a window (e.g. Ubuntu Software Centre) I can see SOME items (sometimes nothing) but by hovering the mouse over it it appears - and then disappears again. Sometimes the side mover acts the same way... Maybe it has to do with my hardware: P4, 3 GHz, 2 GB RAM, older graphics board, KVM-switch? There's no difference whether I use Gnome, Ubuntu standard, Ubuntu classic, Ubuntu fallback... Thanks for hints Jens

    Read the article

< Previous Page | 13 14 15 16 17 18 19 20 21 22 23  | Next Page >