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  • Architecture behind live streaming [on hold]

    - by l19
    I'm a Comp Sci undergraduate student, and I'm currently trying to understand the architecture behind streaming. I hear several terms and I'm not quite sure how they are related (e.g. streaming, broadcasting, ingesting, etc.) Is there a blog post or book that explains: How it all works in a high-level view (the workflow) The architecture (i.e. I capture content using my camera and want to display it real-time to an audience. I imagine that the content will be transferred to a server, but how does that server transmit the information to several users simultaneously?) Thanks!

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  • VNC on Xen failure

    - by BCable
    The following config works and creates a good VM in Xen: # Kernel Setup kernel = "/boot/vmlinuz-2.6.18.8-xenU" # Memory memory = "256" # Disk disk = [ "file:/opt/xen/domains/110/sda1.img,sda1,w", "file:/opt/xen/domains/110/swap.img,sda2,w" ] # container name name = "110" hostname = "boo" # Networking vif = ["type=ieomu, bridge=xenbr0"] # VNC vnc = 1 #vfb = [ 'type=vnc,vncdisplay=2,vnclisten=0.0.0.0,vncpasswd=110' ] # Behavior Settings root = "/dev/sda1" extra = "fastboot" But when I uncomment the VFB line, I get the following error after it hangs for at least 30 seconds: [root@customer 110]# xm create boo.cfg Using config file "./boo.cfg". Error: Device 0 (vkbd) could not be connected. Hotplug scripts not working. Any ideas? Part two of this question: Sometimes it actually works, and a port is opened. When this happens, nmap shows the VNC ports open and I can connect via the VNC client, but it just hangs at "Connection established." and no VNC display shows up. I've tried multiple VNC clients (TightVNC, TightVNC Java Console, RealVNC), but they all fail to connect. Does VNC through Xen require X to be started in order to function? I was under the impression that it would show the console screen, so I'm confused as to why all these issues are occurring. Thanks!

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  • Online resizing of kvm guest root filesystem?

    - by Bittrance
    I have a Linux guest that uses an LVM volume directly as root file system (that is, there is no partition table). libvirt config looks thus: <os> <type arch='x86_64' machine='rhel6.4.0'>hvm</type> <kernel>/boot/vmlinuz-X.Y.Z.el6.x86_64</kernel> <initrd>/boot/initramfs-X.Y.Z.el6.x86_64.img</initrd> <cmdline>console=ttyS0 root=/dev/vda</cmdline> <boot dev='hd'/> </os> <disk type='block' device='disk'> <driver name='qemu' type='raw' cache='none' io='native'/> <source dev='/dev/vg/guest'/> <target dev='vda' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </disk> From inside the guest: $ mount /dev/vda on / type ext4 (rw) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) tmpfs on /dev/shm type tmpfs (rw) none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) Is it possible to resize the guest's root partition without rebooting the guest? Just doing lvextend on the host and resize2fs from the guest does not seem to be enough.

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  • Amazon EC2 migration from one region to the other

    - by Gnanam
    I'm using the following Amazon EC2 resources in the US East (Virginia) region: 1 Running Instance 1 Elastic IP 2 EBS Volumes 100 EBS Snapshots 1 Key Pair 2 Security Groups 5 My Own AMIs (customized based on my application stack) My instance is based on Linux distribution (CentOS) and my AMIs are S3-backed. Both EBS volumes are mounted on this running instance. We're planning to migrate our deployment to US-West region. Because Amazon EC2 resources are not shared across regions, my questions are: What are all the factors that I need to consider in advance? What are all the recommended & different ways of migrating each EC2 resources from one region to the other? Are there any hidden risks involved during and/or after the migration? Experts ideas/suggestions/recommendations on this are highly appreciated.

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  • Newbie one: Virtual Networks - Hyper-V - Remote Destktop - Only one phisical NIC

    - by josecortesp
    Hello everyone, I'll try to explain my situation and I'll apreciate any help: I have a phisical server (quad core, 4Gb ram, 1TB raid 10, etc) with Win Server 2008 R2 enterprise, running IIS, Printing, etc... Also, I want to set up 2 virtual Servers with 2008 R2 standart one with SQL Server and the other with Team Foundation. What i need is: Being able to access from inside the private phisical network, to Remote Desktops on each of the Virtual and the phisical Servers Had Access from the outside, using a router and port Forwarding, to the TFS server and the IIS server (one is virtualized, the other is phisical) This is it, but note that I only have one Phisical Nic. How do I configure this to work. When i set up the hyper-v role, on the wizard something like it showed up but I don't remmember what i choose, and right now, I cannot access none of the servers from remote desktop, not even from the phisical private network. Can anybody point me, what can i do? Thanks in advance (sorry 4 my english, i'm a spanish talker and my english isn't that good)

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  • How is a VM isolated from the physical host?

    - by dotnetdev
    Hi, I was thinking about virtualisation and how to explain it to a non-technical person and one of the things that I was wondering was how to explain the way that a VM is isolated and seperate from the phyiscal machine (so I can have a virus on a VM but this would never effect my physical host, right?). How does this technology work exactly? As I am a programmer, when I think of isolating processes, I think of using appdomains (I work with C# primarily). Thanks

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  • Windows Virtual Machines will not run

    - by jlego
    I'm trying to setup a few virtual machines to use for testing websites in the various old versions of IE. I had Microsoft Virtual PC working on an older machine using XP mode and 2 other VHD's from Microsoft that allowed me to test in IE6-IE8. I've recently gotten a new work machine and am trying to set up the VMs again for testing, however nothing seems to be working. Both the old and the new system run Windows 7 64-bit Ultimate with AMD processors. I downloaded Virtual PC & XP mode from here http://www.microsoft.com/windows/virtual-pc/download.aspx and go through the installation process. XP mode is installed, but when I try to run it it goes through the initial setup process only to fail when it is almost complete with the error "Cannot Complete Setup". (After googling I see that this might be a conflict with my processor) I download other VHD's from here http://www.microsoft.com/windows/virtual-pc/download.aspx in order to get the other versions of IE and try to set those up in Virtual PC as well. I click on them to start the machine and both Windows 7 with IE8 and Windows Vista with IE7 just hang at a black screen. I try to use Virtual Box instead, and I get Windows XP with IE6 running, but I have no internet connection in the VM. I try all different settings and try to google the correct settings but nothing seems to work. When I load the VM, XP shows that its found new hardware but it needs the drivers. One of these pieces of hardware is the network adapter, but I can't connect to the internet to download the driver in the guest OS. VirtualBox tells me I need to install extensions in order for things to function properly. I go through the installation process in the guest OS and restart the VM, however now XP is asking for validation and I can't access the VM. I try installing the other 2 OS (Vista & 7) but I get a BSOD right after the startup screen appears and the VM restarts itself. I'm getting so frustrated trying to make this work, I would really appreciate any assistance on getting the VMs up and running or any alternatives for testing websites in Internet Explorer.

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  • What are best practices on virtual lab/test bed architecture?

    - by WooYek
    I am currently preparing a new small virtual environment for development and testing with Windows Server + SQL Server + AD + Sharepoint + Exchange + IIS(ASP.NET) + Biztalk + ?, for a small (up to 5) dev team. What are pros and cons on different approaches, eg. splitting up over different machines or packing everything up per machine. I your experience what are the best practices I should follow in terms of architecture and various system/servers placement. What to share and what to split per person. I would like to achieve some flexibility for the dev and testing process (so teammebers would not be steeping on each other's toes) and limit administrative effort needed to propagate settings, integrate work items and revert changes when something breaks up. It's not supposed to be an everyday development working environment, more a tier 2 developer testing environment, and not yet an integration or QA testing environment with formal change process. IMO the two borderline solutions are: creating one all-inclusive machine for each dev team member giving them freedom to manage creating shared environment managed by the one with somehow formalized change request process What golden mean would you recommend, and why?

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  • Has anyone gotten Plan9 working in VirtualBox?

    - by Electrons_Ahoy
    More than anything, I'm just curious to know if this is even possible, since Plan 9 isn't in the list of GuestOSes on the VirtualBox website. However, if someone out there has got it working, my specific question: Whenever I try to boot Plan9, either as a live cd or to install inside of VirtualBox, once the GUI loads all I get is a screen of garbage. I think I've tried just about every graphics driver combination at startup - specifically, even 640x480x8 in VESA mode didn't work. Any suggestions as to how I can load it?

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  • One bigger Virtual Machine distributed across many OpenStack nodes [duplicate]

    - by flyer
    This question already has an answer here: Can a virtualized machine have the CPU and RAM resources of multiple underlying physical machines? 2 answers I just setup virtual machines on one hardware with Vagrant. I want to use a Puppet to configure them and next try to setup OpenStack. I am not sure If I am understanding how this should look at the end. Is it possible to have below architecture with OpenStack after all where I will run one Virtual Machine with Linux? ------------------------------- | VM with OS | ------------------------------- | NOVA | NOVA | NOVA | ------------------------------- | OpenStack | ------------------------------- | Node | Node | Node | ------------------------------- More details: In my environment Nodes are just virtual machines, but my question concerns separate Hardware nodes. If we imagine this Nodes(Novas) are placed on a separate machines (e.g. every has 4 cores) can I run one Virtual Machine across many OpenStack Nodes? Is it possible to aggregate the computation power of OpenStack in one virtual distributed operating system?

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  • Best of OTN - Week of Oct 21st

    - by CassandraClark-OTN
    This week's Best of OTN, for you, the best devs, dba's, sysadmins and architects out there!  In these weekly posts the OTN team will highlight the top content from each community; Architect, Database, Systems and Java.  Since we'll be publishing this on Fridays, we'll also mix in a little fun! Architect Community Top Content- The Road Ahead for WebLogic 12c | Edwin BiemondOracle ACE Edwin Biemond shares his thoughts on announced new features in Oracle WebLogic 12.1.3 & 12.1.4 and compares those upcoming releases to Oracle WebLogic 12.1.2. A Roadmap for SOA Development and Delivery | Mark NelsonDo you know the way to S-O-A? Mark Nelson does. His latest blog post, part of an ongoing series, will help to keep you from getting lost along the way. Updated ODI Statement of Direction | Robert SchweighardtHeads up Oracle Data Integrator fans! A new statement of product direction document is available, offering an overview of the strategic product plans for Oracle’s data integration products for bulk data movement and transformation, specifically Oracle Data Integrator (ODI) and Oracle Warehouse Builder (OWB). Bob Rhubart, Architect Community Manager Friday Funny - "Some people approach every problem with an open mouth." — Adlai E. Stevenson (October 23, 1835 – June 14, 1914) 23rd Vice President of the United States Database Community Top Content - Pre-Built Developer VMs (for Oracle VM VirtualBox)Heard all the chatter about Oracle VirtualBox? Over 1 million downloads per week and look: pre-built virtual appliances designed specifically for developers. Video: Big Data, or BIG DATA?Oracle Ace Director Ben Prusinski explains the differences.?? Webcast Series - Developing Applications in Oracle's Public CloudTime to get started on developing and deploying cloud applications by moving to the cloud. Good friend Gene Eun from Oracle's Cloud team posted this two-part Webcast series that has an overview and demonstration of the Oracle Database Cloud Service. Check out the demos on how to migrate your data to the cloud, extend your application with interactive reporting, and create and access RESTful Web services. Registration required, but so worth it! Laura Ramsey, Database Community Manager Friday Funny - Systems Community Top Content - Video: What Kind of Scalability is Better, Horizontal or Vertical?Rick Ramsey asks the question "Is Oracle's approach to large vertically scaled servers at odds with today's trend of combining lots and lots of small, low-cost servers systems with networking to build a cloud, or is it a better approach?" Michael Palmeter, Director of Solaris Product Management, and Renato Ribeiro, Director Product Management for SPARC Servers, discuss.Video: An Engineer Takes a Minute to Explain CloudBart Smaalders, long-time Oracle Solaris core engineer, takes a minute to explain cloud from a sysadmin point of view. ?Hands-On Lab: How to Deploy and Manage a Private IaaS Cloud Soup to nuts. This lab shows you how to set up and manage a private cloud with Oracle Enterprise Manager Cloud Control 12c in an Infrastructure as a service (IaaS) model. You will first configure the IaaS cloud as the cloud administrator and then deploy guest virtual machines (VMs) as a self-service user. Rick Ramsey, Systems Community Manager Friday Funny - Video: Drunk Airline Pilot - Dean Martin - Foster Brooks Java Community Top Content - Video: NightHacking Interview with James GoslingJames Gosling, the Father of Java, discusses robotics, Java and how to keep his autonomous WaveGliders in the ocean for weeks at a time. Live from Hawaii.  Video: Raspberry Pi Developer Challenge: Remote Controller A developer who knew nothing about Java Embedded or Raspberry Pi shows how he can now control a robot with his phone. The project was built during the Java Embedded Challenge for Raspberry Pi at JavaOne 2013.Java EE 7 Certification Survey - Participants NeededHelp us define how to server your training and certification needs for Java EE 7. Tori Wieldt, Java Community Manager Friday Funny - Programmers have a strong sensitivity to Yak's pheromone. Causes irresistible desire to shave said Yak. Thanks, @rickasaurus! To follow and take part in the conversation follow/like etc. at one or all of the resources below -  OTN TechBlog The Java Source Blog The OTN Garage Blog The OTN ArchBeat Blog @oracletechnet @java @OTN_Garage @OTNArchBeat @OracleDBDev OTN I Love Java OTN Garage OTN ArchBeat Oracle DB Dev OTN Java

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  • VirtualBox in production?

    - by MrG
    I'm planning to move a service which is currently powered by Debian into a VirtualBox. That would allow us to easily port it i.e. to a faster machine if required. The setup would be: debian host > Virtual Box #1 > debian instance #1 running Apache & application > Virtual Box #2 > debian instance #2 containing database Do you have any experience with a production setup based on Virtual Box? Is it stable and fast enough? Many thanks!

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  • Understanding an Application based on the OS interaction with a Hypervisor

    - by Dewy
    Following I will ask a few specific questions but I will set the stage first. My goal is to monitor Applications in a very odd place - between the OS and a Hypervisor. If you have comments about this probably unachievable goal please do educate me. One good advice or link can save me days of work. Now to my current attempt. I installed on WinXP a VirtualBox (being open-source) and got a guest OS of latest Ubuntu running within. Where should I go next? Can I set the logs to show all memory/CPU/disk instructions of the guest OS? Thanks, Dewy

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  • HAProxy "503 Service Unavailable" for webserver running on a KVM virtual machine

    - by Menda
    I'm setting up a server with KVM (IP 192.168.0.100) and I have created inside of it one virtual machine using network bridging at 192.168.0.194. This virtual machine has an nginx instance running, which I can access from the server or from any computer computer in the internal network just typing in the browser http://192.168.0.194. However, I try configure HAProxy in the same server that hosts KVM and looking the status page of HAProxy it always shows the virtual machine as "DOWN". If I try from the server http://localhost, it should be the same than if I go to http://192.168.0.194. My goal is to build a reverse proxy, but I tried this little example and won't work. What am I doing bad? This is my config file in the server: # /etc/haproxy/haproxy.cfg global maxconn 4096 user haproxy group haproxy daemon defaults log global mode http option httplog option dontlognull retries 3 option redispatch maxconn 2000 contimeout 5000 clitimeout 50000 srvtimeout 50000 listen ServerStatus *:8081 mode http stats enable stats auth haproxy:haproxy listen Server *:80 mode http balance roundrobin cookie JSESSIONID prefix option httpclose option forwardfor option httpchk HEAD /check.txt HTTP/1.0 server mv1 192.168.0.194:80 cookie A check Thanks.

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  • Netinstalling CentOS if the gateway is in a different subnet

    - by James Lawrie
    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 gateway. The problem is that the two external IP addresses are on different subnets (different /8s in fact) so by default, B claims it cannot reach A (Network Unreachable). I can resolve this by adding a static route on B: echo "any host gateway_ip dev eth0" > /etc/sysconfig/static-routes Modifying /etc/init.d/networking to reload the gateway after applying static routes (I only added the final line before fi): if [ -f /etc/sysconfig/static-routes ]; then grep "^any" /etc/sysconfig/static-routes | while read ignore args ; do /sbin/route add -$args done route add default gw "${GATEWAY}" fi If I then restart networking, it comes online. How can I do this (or work around it some other way) prior to the system being installed, ideally inside an Anaconda kickstart file?

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  • "vagrant up" fails with "NS_ERROR_CALL_FAILED" error [on hold]

    - by TahitiPetey
    I am following the basic "Getting Started" guide: http://docs.vagrantup.com/v2/getting-started/index.html I ran vagrant init <etc> followed by vagrant up, but it fails with "NS_ERROR_CALL_FAILED" error. Then by enabling debug logging with VAGRANT_LOG=debug vagrant up, I get the following error output: ERROR vagrant: /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/plugins/providers/virtualbox/driver/base.rb:316:in `execute' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/plugins/providers/virtualbox/driver/version_4_2.rb:165:in `import' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/plugins/providers/virtualbox/action/import.rb:15:in `call' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/action/warden.rb:34:in `call' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/action/builtin/handle_box_url.rb:72:in `call' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/action/warden.rb:34:in `call' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/plugins/providers/virtualbox/action/check_accessible.rb:18:in `call' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/action/warden.rb:34:in `call' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/action/runner.rb:61:in `block in run' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/util/busy.rb:19:in `busy' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/action/runner.rb:61:in `run' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/action/builtin/call.rb:51:in `call' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/action/warden.rb:34:in `call' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/action/builtin/config_validate.rb:25:in `call' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/action/warden.rb:34:in `call' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/plugins/providers/virtualbox/action/check_virtualbox.rb:17:in `call' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/action/warden.rb:34:in `call' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/action/builder.rb:116:in `call' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/action/runner.rb:61:in `block in run' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/util/busy.rb:19:in `busy' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/action/runner.rb:61:in `run' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/machine.rb:147:in `action' /Applications/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/batch_action.rb:63:in `block (2 levels) in run' INFO interface: error: There was an error while executing `VBoxManage`, a CLI used by Vagrant for controlling VirtualBox. The command and stderr is shown below. Command: ["import", "/Users/me/.vagrant.d/boxes/precise32/virtualbox/box.ovf"] Stderr: 0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100% Interpreting /Users/me/.vagrant.d/boxes/precise32/virtualbox/box.ovf... OK. 0%... Progress object failure: NS_ERROR_CALL_FAILED My system setup info: Vagrant 1.2.2 VirtualBox 4.2.14 (Also tried 4.2.10, same error) Mac OSX 10.8.3

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  • Virtual machine on ubuntu

    - by MITHIYA MOIZ
    I have configured virtual machine on ubuntu with the help of below article, https://help.ubuntu.com/9.04/serverguide/C/libvirt.html I managed to finish all the part except the major portion getting virtual host to talk to real network, Which I guess should be done only via bridge interface. Via virtual machine manager I try to choose any interface it gives me interface not bridged When I try to bridge the interceface eth0 as below auto br0 iface br0 inet static address 192.168.0.223 network 192.168.0.0 netmask 255.255.255.0 broadcast 192.168.0.255 gateway 192.168.0.1 bridge_ports eth0 bridge_fd 9 bridge_hello 2 bridge_maxage 12 bridge_stp off I cannot communicate with this interface to network, host server looses all the communication to network. But when I remote bridge interface from /etc/network/interfaces And configure eth0 as below it works fine The primary network interface auto eth0 iface eth0 inet static address 192.168.0.223 netmask 255.255.255.0 network 192.168.0.0 broadcast 192.168.0.255 dns-nameservers 62.215.6.51 gateway 192.168.0.1 how can i setup bridge interface correctly and how would my /etc/netwrok/interfaces file would look a like.

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  • Vserver still interesting ?

    - by Kartoch
    I was using Vserver a long time ago. But since the last stable release (2007), BSD jails are offering many more functionalities. It is not clear if Vserver has still a future (still some development on it). have you dump (ou keep) vserver for your production servers ? For which reasons ?

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  • Zenoss No space left on device Error

    - by Pastelinux
    Site Error An error was encountered while publishing this resource. Sorry, a site error occurred. Traceback (innermost last): Module ZPublisher.Publish, line 231, in publish_module_standard Module ZPublisher.Publish, line 165, in publish Module Zope2.App.startup, line 211, in __call__ Module Products.ZenUI3.browser, line 105, in __call__ Module Products.Five.browser.pagetemplatefile, line 60, in __call__ Module zope.pagetemplate.pagetemplate, line 115, in pt_render Module zope.tal.talinterpreter, line 271, in __call__ Module zope.tal.talinterpreter, line 343, in interpret Module zope.tal.talinterpreter, line 858, in do_defineMacro Module zope.tal.talinterpreter, line 343, in interpret Module zope.tal.talinterpreter, line 533, in do_optTag_tal Module zope.tal.talinterpreter, line 518, in do_optTag Module zope.tal.talinterpreter, line 513, in no_tag Module zope.tal.talinterpreter, line 343, in interpret Module zope.tal.talinterpreter, line 620, in do_insertText_tal Module Products.PageTemplates.Expressions, line 203, in evaluateText Module Products.PageTemplates.Expressions, line 222, in _handleText Module zope.component._api, line 174, in queryUtility Module zope.component.registry, line 165, in queryUtility Module ZODB.Connection, line 834, in setstate Module ZODB.Connection, line 884, in _setstate Module ZEO.ClientStorage, line 815, in load Module ZEO.cache, line 143, in call Module ZEO.cache, line 607, in store IOError: [Errno 28] No space left on device Went in to check my server through zenoss today and it looks like somehow my server is full. Which when i look at my server its only 85% full: unclebob:~# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/unclebob--vg0-unclebob--root 1.9G 1.5G 335M 82% / tmpfs 471M 0 471M 0% /lib/init/rw udev 10M 820K 9.2M 9% /dev tmpfs 471M 0 471M 0% /dev/shm overflow 1.0M 1.0M 0 100% /tmp /dev/hde1 942M 36M 859M 5% /boot unclebob:/tmp# df -i Filesystem Inodes IUsed IFree IUse% Mounted on /dev/mapper/unclebob--vg0-unclebob--root 121920 54844 67076 45% / tmpfs 120489 3 120486 1% /lib/init/rw udev 120489 1520 118969 2% /dev tmpfs 120489 1 120488 1% /dev/shm overflow 120489 14 120475 1% /tmp /dev/hde1 61312 33 61279 1% /boot It looks like theres these two files: .ICE-unix/ .X11-unix/ They had been hidden. I'll remove those. Any idea upon what they maybe? Any ideas on a fix? Probably has something to do with Zenoss

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  • Debian: Should I add vlan interface into bridge for KVM?

    - by javano
    I am setting up a Debian Squeeze box as a KVM host. I want to add multiple interfaces to each KVM guest so I want them to be on different VLANs. After reading about this, I believe the best method is to add multiple logical VLAN (sub)-interfaces to the physical NICs and then create a bridge adapter for each VLAN interace, and assign each bridge as a NIC for KVM guests. Does this make good sense, or madness? Do I have to use bridged interfaces with KVM like this? Can't I just add eth1.xx and eth1.yy to my interfaces config below and then configure those directly as bridged KVM guest NICs? If so, how should this look in the interfaces config file below? user@host:~$ cat /etc/network/interfaces # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback # Management Interface auto eth0 iface eth0 inet static address 172.22.0.31 netmask 255.255.255.0 gateway 172.22.0.1 # Interface for guest VMs auto eth1 # Guest1 : Use VLAN 117 auto eth1.117 iface eth1.117 inet manual # Set up br1 for guest 1, bridging with vlan 117 auto br1.117 iface br1.117 inet manual bridge_ports eth1.117 bridge_stp off user@host:~$ uname -a Linux hostname 3.4.9 #1 SMP Wed Aug 22 19:08:46 BST 2012 x86_64 GNU/Linux UPDATE I would really like it if someone could clarify the config for me, as I have also seen the above configured with this syntax, so I don't see why one would be preferred over the other; # Interface for guest VMs auto eth1 allow-hotplug eth1 iface eth1 inet static # Vlan 117 for guest 1 auto vlan 117 iface vlan111 inet static vlan_raw_device eth1 # Guest 1 : NIC 1 auto br1.117 iface br1.117 inet manual bridge_ports vlan117 bridge_stp off

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  • Force an LXC container to use its own IP address

    - by emma sculateur
    Sorry if this question has already been asked. I could not find it, I have this setup : +---------------------------------------------------------------------------------------------+ |HOST | | | | +-------------------------------------------------+ | | | UBUNTU-VM | | | | | | | | +-------------------+ | | | | |UBUNTU-LXC | | +------------------+ | | | | 10.0.0.3/24 | 10.0.0.1/24 | |OTHER VM | | | | | eth0-----lxcbr0----------eth0-----------br0----------eth0 | | | | | | 192.168.100.2/24| 192.168.100.1/24 |192.168.100.3/24 | | | | +-------------------+ | +------------------+ | | +-------------------------------------------------+ | +---------------------------------------------------------------------------------------------+ When I ping 192.168.100.3 from my UBUNTU-LXC, the source IP address is automatically changed to 192.168.100.2 by UBUNTU-VM. It's like having a NAT, whereas I really want my UBUNTU-LXC to talk with it own IP address. Is there any way to do this ? Edit : these info may be relevant : I am using KVM +libvirt to set up my VMs Here is how I create my interface in UBUNTU-VM : <interface type='bridge'> <mac address='52:54:00:cb:aa:74'/> <source bridge='br0'/> <model type='e1000'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/> </interface>

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  • Volume group disappeared, LVs still available

    - by Ben
    I've run into an issue with my KVM host which runs VMs on a LVM volume. As of last night the logical volumes are no longer seen as such (I can't create snapshots of them even though I have been for months now). Running any scans all result in nothing being found: [root@apollo ~]# pvscan No matching physical volumes found [root@apollo ~]# vgscan Reading all physical volumes. This may take a while... No volume groups found root@apollo ~]# lvscan No volume groups found If I try restoring the VG conf backup from /etc/lvm/backups/vg0 I get the following error: [root@apollo ~]# vgcfgrestore -f /etc/lvm/backup/vg0 vg0 Couldn't find device with uuid 20zG25-H8MU-UQPf-u0hD-NftW-ngsC-mG63dt. Cannot restore Volume Group vg0 with 1 PVs marked as missing. Restore failed. /etc/lvm/backups/vg0 has the following for the physical volume: physical_volumes { pv0 { id = "20zG25-H8MU-UQPf-u0hD-NftW-ngsC-mG63dt" device = "/dev/sda5" # Hint only status = ["ALLOCATABLE"] flags = [] dev_size = 4292870143 # 1.99902 Terabytes pe_start = 384 pe_count = 524031 # 1.99902 Terabytes } } fdisk -l /dev/sda shows the following: [root@apollo ~]# fdisk -l /dev/sda Disk /dev/sda: 6000.1 GB, 6000069312512 bytes 64 heads, 32 sectors/track, 5722112 cylinders Units = cylinders of 2048 * 512 = 1048576 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000188b7 Device Boot Start End Blocks Id System /dev/sda1 2 32768 33553408 82 Linux swap / Solaris /dev/sda2 32769 33280 524288 83 Linux /dev/sda3 33281 1081856 1073741824 83 Linux /dev/sda4 1081857 3177984 2146435072 85 Linux extended /dev/sda5 1081857 3177984 2146435071+ 8e Linux LVM The server is running a 4 disk HW RAID10 which seems perfectly healthy according to megacli and smartd. The only odd message in /var/log/messages is the following which shows up every couple of hours: Jun 10 09:41:57 apollo udevd[527]: failed to create queue file: No space left on device Output of df -h [root@apollo ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda3 1016G 119G 847G 13% / /dev/sda2 508M 67M 416M 14% /boot Does anyone have any ideas what to do next? The VMs are all running fine at the moment apart from not being able to snapshot them. Updated with extra info It's not a lack of inodes: [root@apollo ~]# df -i Filesystem Inodes IUsed IFree IUse% Mounted on /dev/sda3 67108864 48066 67060798 1% / /dev/sda2 32768 47 32721 1% /boot pvs, vgs & lvs either output nothing or "No volume groups found".

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  • Tool that will virtualize BIOS

    - by Nrew
    Is there any application that can virtualize the BIOS?So that you can see the effects of what the changes in the setting of your BIOS. I know that there are many versions of BIOS depending on your hardware. But is it possible to copy it and then virtualize it when you are running your system. So that you can see if your system can still run after changing the settings.

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