{"id":5537,"date":"2014-03-30T23:50:00","date_gmt":"2014-03-30T23:50:00","guid":{"rendered":"https:\/\/unknownerror.org\/index.php\/2014\/03\/30\/problem-about-kvm-collection-of-common-programming-errors\/"},"modified":"2014-03-30T23:50:00","modified_gmt":"2014-03-30T23:50:00","slug":"problem-about-kvm-collection-of-common-programming-errors","status":"publish","type":"post","link":"https:\/\/unknownerror.org\/index.php\/2014\/03\/30\/problem-about-kvm-collection-of-common-programming-errors\/","title":{"rendered":"problem about kvm-Collection of common programming errors"},"content":{"rendered":"<ul>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/d9ca42b7a9b020107ab7f6ec16508a6a?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nMarietto<br \/>\n13.04 windows windows-7 virtualization kvm<br \/>\nI&#8217;m trying to install Windows 7 Professional as a KVM guest using virt-install with an ISO file on my Ubuntu 13.04 via command line. Using the following commands:root@ziomario-Macmini:\/# sudo invoke-rc.d apparmor stopClearing AppArmor profiles cache [ OK ] All profile caches have been cleared, but no profiles have been unloaded. Unloading profiles will leave already running processes permanently unconfined, which can lead to unexpected situations.To set a pr<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/27fbdb95b6c2aa8190e427d5a9544764?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nShayne<br \/>\n12.04 server windows-7 virtualization kvm<br \/>\nI&#8217;m trying to install Windows 7 Professional 64-bit as a KVM guest using virt-install with an ISO file on my headless Ubuntu 12.04 Server via command line. I&#8217;m using Putty SSH from a Windows machine (with Xming and X11 configured) to access the server. Using the following command:sudo virt-install &#8211;connect qemu:\/\/\/system -n win7_pro_x64 -r 3072 -c X17-24281.iso &#8211;vnc &#8211;noautoconsole &#8211;os-type windows &#8211;os-variant win7 &#8211;disk \/dev\/sdd1,size=1000 &#8211;accelerateI get hung on the domain installation.<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/ce60a64d7650842955b526c3c4e85d0d?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nsarnold<br \/>\ngdb linux-kernel kvm<br \/>\nI am trying to debug Linux kernel with kvm vm. I am getting an error message &#8220;Remote &#8216;g&#8217; packet reply is too long&#8221;. My host is 64-bit and so is my vm.My steps:Start the VM with custom -kernel, -initrd and -append options. Start gdb Execute &#8220;set architecture i386:x86-64:intel&#8221; Execute &#8220;add-symbol-file linux-3.0\/vmlinux&#8221; Execute &#8220;show arch&#8221; to verify its still &#8220;i386:x86-64:intel&#8221; Execute &#8220;target remote localhost:1234&#8221; Execute &#8220;continue&#8221; Press Ctrl+C, I get the above message.Has anyone faced this p<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/acf5f81d685d2aefe01849f96d6f50f4?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nrvk<br \/>\ncommand-line virtualization kvm<br \/>\nI have a host computer (Ubuntu 12.04) running KVM (QEMU) which has anywhere from 1 to 10 VM&#8217;s using Windows XP, Windows 7, Debian, Ubuntu etc.. From the host machine I need a way to bind serial coms on these guests at runtime and (if needed) reboot them.I found a hack way to do this where I can dump the VM .xml config file and add this (using python):&lt;serial type=&#8217;dev&#8217;&gt;&lt;source path=&#8217;\/dev\/ttyS1.vm2&#8217;\/&gt;&lt;target port=&#8217;1&#8217;\/&gt; &lt;\/serial&gt;And then reload it to and reboot, but I serio<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/d9c4a52eaeaf2d863810d1ba89ac806d?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nqbi<br \/>\n12.10 networking server virtualization kvm<br \/>\nI have a server running Proxmox (a virtualization platform), and created a KVM virtual machine with Ubuntu Server 12.10. After configuring the network, everything works fine, but if I add a second network adapter to that virtual machine, it is not recognized. dmesg | grep -i eth just shows one interface (eth0).<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/f9341836ce1cf04cd7e128e4c8b1db99?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nThinkingStiff<br \/>\nlinux-kernel vmware linux-device-driver kvm<br \/>\nI&#8217;m currently setting up vmware Server 2.0 for kernel debugging with gdb ( see this setup guide ) and someone asked me why not use kvm? So I ask: kvm vs. vmware for kernel debugging \/ USB driver development what are the pros and cons of each?<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/3d3a40b43d638725a348384e70d86285?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nronalchn<br \/>\nhadoop filesystems hdfs kvm<br \/>\nMy hadoop is built on KVM environment, but the VMs are not only for hadoop distributed computing, they have other important tasks.So, I&#8217;m wondering whether the command hadoop namenode -format will format the VMs&#8217;s whole hard disk to HDFS type and make the VM&#8217;s other job crash&#8230;By the way, is there any resource about HDFS ? I&#8217;ll appreciate the flavor very much.<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/aa57dfe3862bc78f6b385e84673df567?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\ncasualunixer<br \/>\nnetworking kvm file-transfer<br \/>\nI am running a 32-bit Linux virtual machine on KVM. The host machine is a 64-bit Linux machine connected to a LAN. Attempting to transfer files with scp from the KVM machine to a server on the LAN gives abysmal performance, about 500kB\/s over gigabit Ethernet. Around 1% of the expected rate. Any suggestions?<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/c0501348178dc600e5f3e45582505b4a?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nDon Quixote<br \/>\n11.10 vnc kvm qemu sdl<br \/>\nI&#8217;ve been coming up to speed on the Haiku operating system, an Open Source clone of BeOS 5 Pro.I&#8217;m using an Apple MacBook Pro as my development machine. Apple&#8217;s BootCamp BIOS does not support more than four partitions on the internal hard drive. While I can set up extended and logical partitions, doing so will prevent any of the installed operating systems from booting. To run Haiku directly on the iron, I boot it off a USB stick. Using external storage is also helpful because I am perpetual<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/6ff4cd8215da90fc876b73a1ba0554f0?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nBasharat Sial<br \/>\n12.10 virtualization kvm<br \/>\nI&#8217;m trying to install a Windows 8 VM using KVM and the Virtual Machine Manager GUI. Upon installing KVM and VMM, and starting VMM I get the error Unable to connect to libvirt.Verify that:- The &#8216;libvirt-bin&#8217; package is installed- The &#8216;libvirtd&#8217; daemon has been started- You are member of the &#8216;libvirtd&#8217; groupI tried apt-get install libvirt-bin and it was installed.But I do not know how to check if the daemon has started or check \/ add myself as a member.<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/b8dae7eda1d90c2b660c5c2a228a92ca?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nSimon<br \/>\n12.04 startup virtualization kvm openstack<br \/>\nI&#8217;ve added simple line:python &lt;path-to-my-script&gt; &amp;to \/etc\/rc.local, but I&#8217;ve noticed that after migration from one host to the other one, the script sometimes fails.I&#8217;m using KVM, VM&#8217;s are under Ubuntu 12.04 32-bits. Host&#8217;s have Ubuntu 12.04 64-bits and I&#8217;m using Live Migration (private cloud built with Openstack).I don&#8217;t know it&#8217;s KVM\/Libvirt&#8217;s fault or maybe I&#8217;m doing something wrong on Ubuntu or maybe it&#8217;s cloud software&#8217;s fault? Could it be rc.local fault? Is there something what<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/16da5b10d8ab5b612cee00208111d2fc?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\naquaherd<br \/>\nvirtualization kvm kms sdl framebuffer<br \/>\nI deduce from the kvm howtos that this should actually work with sdl and a framebuffer, but I can&#8217;t get it going. Doing kvm -cdrom tinycore-current.iso with normal user account on a virtual terminal gives:kvm: pci_add_option_rom: failed to find romfile &#8220;pxe-rtl8139.bin&#8221; init kbd. init mouse failed. Could not initialize SDL(Unable to open mouse) &#8211; exitingWhile it works flawlessly under X.Running it with sudo prepended crashes display and keyboard.So what can I do?<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/9c36fd791a8e116a9c1a388f697b5b93?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nHDave<br \/>\n12.04 server virtualization kvm syslog<br \/>\nI have a server that hosts about 20 KVM guest machines. It&#8217;s syslog is, at times, flooded with messages like these:00:17:36 vhost-server kernel: [ 157.835078] kvm: 3138: cpu0 unhandledrdmsr: 0xc0010112 Mar 28 00:17:36 vhost-server kernel: [ 157.835108]kvm: 3138: cpu0 unhandled rdmsr: 0xc0010048 Mar 28 00:17:36vhost-server kernel: [ 157.999164] kvm: 3138: cpu0 unhandled rdmsr:0xc0010001 Mar 28 00:17:37 vhost-server kernel: [ 158.378247] kvm:3179: cpu0 unhandled rdmsr: 0xc0010112 Mar 28 00:17<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/da5e11d3f25a58742129931a5da9e3d7?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nRobert<br \/>\nbash ssh shell-script kvm<br \/>\nI&#8217;m trying to run a set of commands on a remote machine, that includes an if statement. I&#8217;m using this to shutdown a list of kvm instances. The first line should be fine, but could be prettier, rest needs some help. ssh root@kvmsrv &#8216;virsh shutdown $host 2&gt; \/dev\/null; virsh destroy $host 2&gt; \/dev\/null; sleep 2; virsh undefine $host 2&gt; \/dev\/null&#8217;# Also needs to be run on remote machine # to disconnect iscsi iscsiadm -m session | grep $host if [ $? == 0 ]; theniscsiadm -m node -T $stserver.<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/f200b43dd7a12345e2d46d7256b4cfe6?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nJay _silly_evarlast_ Wren<br \/>\nvirtualization kvm libvirt<br \/>\nvirt-install says name is in use, but virsh list &#8211;all says there is nothing.jrwren@delays:{%22}~ $ virt-install -d -n android -r 512 &#8211;disk android.qcow2 -s 4 -c \/d\/cd\\ images\/android-x86-2.2-generic.iso &#8211;vnc &#8211;noautoconsole [Thu, 05 Jul 2012 16:57:19 virt-install 23170] DEBUG (cli:220) Launched with command line: \/usr\/bin\/virt-install -d -n android -r 512 &#8211;disk android.qcow2 -s 4 -c \/d\/cd images\/android-x86-2.2-generic.iso &#8211;vnc &#8211;noautoconsole [Thu, 05 Jul 2012 16:57:19 virt-install 23170]<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/5b9e616dc64447885aa50253509a4823?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nPhani<br \/>\nvirtualization virtual-machine qemu kvm libvirt<br \/>\nI have installed KVM on my Ubuntu system. Using vmbuilder, I setup a linux VM. When I tried to access the console using virsh console vm command, I was getting an error. I tried to follow the solution but, I cannot seem to be able to make permanent changes whatsoever to the configuration file. I tried both manually editing the xml config file as well as using the virsh edit command. But after I edit the file and close it, if I reopen the config file using virsh edit again, I get back the origina<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/d4f7d15de2abdec49cacaac7d14f00fc?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nJorge Castro<br \/>\n11.10 kvm<br \/>\nI&#8217;m running Oneric as the host, would like to create several virtual machines. Both the host and the guests will be headless &#8211; there is no display connected, and I&#8217;d like to connect to them via ssh.Looks like kvm is the official ubuntu recommended way, so I&#8217;m following the documentation: http:\/\/help.ubuntu.com\/community\/KVM\/CreateGuests Here&#8217;s my ubuntu-vm-builder command:sudo ubuntu-vm-builder kvm oneiric \\&#8211;domain xpstage &#8211;dest xpstage &#8211;hostname xpstage \\&#8211;arch i386 &#8211;mem 1024 \\&#8211;user myuser<\/li>\n<\/ul>\n<p>Web site is in building<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Marietto 13.04 windows windows-7 virtualization kvm I&#8217;m trying to install Windows 7 Professional as a KVM guest using virt-install with an ISO file on my Ubuntu 13.04 via command line. Using the following commands:root@ziomario-Macmini:\/# sudo invoke-rc.d apparmor stopClearing AppArmor profiles cache [ OK ] All profile caches have been cleared, but no profiles have been [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5537","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/5537","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=5537"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/5537\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=5537"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=5537"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=5537"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}