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  • Am I the only one this anal / obsessive about code? [closed]

    - by Chris
    While writing a shared lock class for sql server for a web app tonight, I found myself writing in the code style below as I always do: private bool acquired; private bool disposed; private TimeSpan timeout; private string connectionString; private Guid instance = Guid.NewGuid(); private Thread autoRenewThread; Basically, whenever I'm declaring a group of variables or writing a sql statement or any coding activity involving multiple related lines, I always try to arrange them where possible so that they form a bell curve (imagine rotating the text 90deg CCW). As an example of something that peeves the hell out of me, consider the following alternative: private bool acquired; private bool disposed; private string connectionString; private Thread autoRenewThread; private Guid instance = Guid.NewGuid(); private TimeSpan timeout; In the above example, declarations are grouped (arbitrarily) so that the primitive types appear at the top. When viewing the code in Visual Studio, primitive types are a different color than non-primitives, so the grouping makes sense visually, if for no other reason. But I don't like it because the right margin is less of an aesthetic curve. I've always chalked this up to being OCD or something, but at least in my mind, the code is "prettier". Am I the only one?

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  • Windows 8.1 Professional Hyper-V - can I create my own linux VM through it?

    - by KevinM1
    I have a Windows 8.1 Professional desktop, and would like to have a Linux Mint VM on it so I can do some opensource web development work. I've tried VirtualBox, but it's giving me an IO error during the Mint .iso installation. VMWare Player flat out tells me it can't install because I have Hyper-V on my machine by default. My biggest concern is nuking the desktop, which is where I do most of my non-development work/browsing/etc. The desktop seems to be listed as a VM itself in the Hyper-V Manager, and I don't want to accidentally break it. So, two questions: Can I create the Mint VM I want/need for my work? Can I do it without messing up the desktop?

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  • How can I create a copy of a vm in vSphere Client running on ESXi 4.0?

    - by user37860
    I'd like to create copies of the VMs located on my datastore that I can put up temporarily on a different server while I perform some maintenance on our main virtualization server. Aside from using the Converter utility (which I don't believe I can use with the Linux machines) is there a way to make copies of these machines? It would make my life a lot easier. Thanks!

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  • Hyper-V for Developers Part 1 Internal Networks

    Over the last year, weve been working with Microsoft to build training and demo content for the next version of Office Communications Server code-named Microsoft Communications Server 14.  This involved building multi-server demo environments in Hyper-V, getting them running on demo servers which we took to TechEd, PDC, and other training events, and sometimes connecting the demo servers to the show networks at those events.  ITPro stuff that should scare the hell out of a developer! It can get ugly when I occasionally have to venture into ITPro land.  Lets leave it at that. Having gone through this process about 10 to 15 times in the last year, I finally have it down.  This blog series is my attempt to put all that knowledge in one place if anything, so I can find it somewhere when I need it again.  Ill start with the most simple scenario and then build on top of it in future blog posts. If youre an ITPro, please resist the urge to laugh at how trivial this is. Internal Hyper-V Networks Lets start simple.  An internal network is one that intended only for the virtual machines that are going to be on that network it enables them to communicate with each other. Create an Internal Network On your host machine, fire up the Hyper-V Manager and click the Virtual Network Manager in the Actions panel. Select Internal and leave all the other default values. Give the virtual network a name, and leave all the other default values. After the virtual network is created, open the Network and Sharing Center and click Change Adapter Settings to see the list of network connections. The only thing I recommend that you do is to give this connection a friendly label, e.g. Hyper-V Internal.  When you have multiple networks and virtual networks on the host machines, this helps group the networks so you can easily differentiate them from each other.  Otherwise, dont touch it, only bad things can happen. Connect the Virtual Machines to the Internal Network Im assuming that you have more than 1 virtual machine already configured in Hyper-V, for example a Domain Controller, and Exchange Server, and a SharePoint Server. What you need to do is basically plug in the network to the virtual machine.  In order to do this, the machine needs to have a virtual network adapter.  If the VM doesnt have a network adapter, open the VMs Settings and click Add Hardware in the left pane.  Choose the virtual network to which to bind the adapter to. If you already have a virtual network adapter on the VM, simply connect it to the virtual network. Assign IP Addresses to the Virtual Machines on the Internal Network Open the Network and Sharing Center on your VM, there should only be 1 network at this time.  Open the Properties of the connection, select Internet Protocol Version 4 (TCP/IPv4) and hit Properties. In this environment, Im assigning IP addresses as 192.168.0.xxx.  This particular VM has an IP address of 192.168.0.40 with a subnet mask of 255.255.255.0, and a DNS Server of 192.168.0.18.  DNS is running on the Domain Controller VM which has an IP address of 192.168.0.18. Repeat this process on every VM in your environment, obviously assigning a unique IP address to each.  In an environment with a domain controller, you should now be able to ping the machines from each other. What Next? After completing this process, heres what you still cannot do: Access the internet from any of the VMs Remote desktop to a VM from the host Remote desktop to a VM over the network In the next post, well take a look configuring an External network adapter on the virtual machines.  Well then build on top of that so that you can RDP into the VMs from the host machine and over the network.Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Creating a file server - How can I use a large VHD file in Hyper-V? (700GB)

    - by barfoon
    Hey everyone, After a few discussions (here, here, and here), I am still unable to create a simple VM that will be used as a fileserver hosted on my Hyper-V box. I have created a fixed 700GB SCSI drive (.vhd file), as I have learned an IDE drive of this size is not possible. Not to sound too cynical, but its blown me away at how much trouble its been to create a large amount of space and start using it. What is the best way to create a fileserver with a drive of this size hosted on Hyper-V Server 2008, and how can I get it going??? Inclusion of OS, driver, integration tools etc, anything you feel is required would be greatly appreciated. Extra information I am using the stand-alone version of Hyper-V server, and not Windows Server 2008. I have tried loading the Linux Integration Tools (linked in the comments of the last link above) onto a SUSE 11 VM and the installation fails, the machine cannot see the vhd at all. Thanks very much,

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  • Quick and dirty user management service for Linux VMs?

    - by quack quixote
    Background I have a home server running Debian, and a workstation that runs various VirtualBox VMs (mostly Linuxen but some Windows). At the moment, I'm creating my main user account anew for every new Linux VM. I'd like to make use of a centralized user-management scheme instead, so I can just configure the new VMs for the directory technology and let them handle user lookups automatically. The last time I worked with anything like this, NIS+ was still in fashion. I have a vague notion of what LDAP and Active Directory are, but no knowledge of how to configure them for what I want. Question What user-management/network-directory technology should I use for providing user accounts to my network? The server must run on Debian Lenny. Client configuration should be simple point-at-server-and-go. I need an example configuration for one sample user account. (nice-to-have) I may want to mount the user's home directory from the server. (nice-to-have) The same configuration works with Windows clients.

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  • Is there any way to distribute x264 encoding jobs across multiple computers (to increase the encoding speed)?

    - by Breakthrough
    Does anyone know of a current, active solution to encoding x264 videos across many computers (via the network) to increase encoding FPS? Brownie points for cross-platform and open source, but just so you all know, I usually use Windows. Programs that I have heard of, and why I do not believe they are suitable: x264farm: Not actively developed. Good interface, but does not support two-pass encoding, and fails with newer x264 builds. ELDER: Again, not actively developed, but my issue was that it didn't work with new x264 builds, and it was very difficult to configure (read: randomly stopped working). While I don't absolutely need a program which is being actively developed, I would like one that supports two-pass encoding, and works with new(er) x264 builds. Additional information: So far, I've offered (and awarded!) two separate bounties on this question since I first posted it over two years ago, and I still haven't found a solution to this problem. What I'm looking for basically is a simple program to allow me to encode x264 videos using the processing power of multiple computers connected over a LAN. Furthermore, it would be nice if it worked with new(er) x264 builds, and supported two-pass encoding. If at any time someone has an updated answer, or a new solution to this problem, please post it and it will be given some consideration.

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  • IPTABLE & IP-routed netwok solution for HOST net and VM's subnet

    - by Daniel
    I've got ProxmoxVE2.1 ruled KVM node on Debian and bunch of VM's guests machine. That is how my networking looks like: # network interface settings auto lo iface lo inet loopback # device: eth0 auto eth0 iface eth0 inet static address 175.219.59.209 gateway 175.219.59.193 netmask 255.255.255.224 post-up echo 1 > /proc/sys/net/ipv4/conf/eth0/proxy_arp And I've got two working subnet solution auto vmbr0 iface vmbr0 inet static address 10.10.0.1 netmask 255.255.0.0 bridge_ports none bridge_stp off bridge_fd 0 post-up ip route add 10.10.0.1/24 dev vmbr0 This way I can reach internet, to resolve outside hosts, update and download everything I need but can't reach one guest VM out of any other VM's inside my network. The second solution allows me to communicate between VM's: auto vmbr1 iface vmbr1 inet static address 10.10.0.1 netmask 255.255.255.0 bridge_ports none bridge_stp off bridge_fd 0 post-up echo 1 > /proc/sys/net/ipv4/ip_forward post-up iptables -t nat -A POSTROUTING -s '10.10.0.0/24' -o vmbr1 -j MASQUERADE post-down iptables -t nat -D POSTROUTING -s '10.10.0.0/24' -o vmbr1 -j MASQUERADE I can even NAT internal addresses: -t nat -I PREROUTING -p tcp --dport 789 -j DNAT --to-destination 10.10.0.220:345 My inexperienced mind is ready to double VM's net adapters: one for the first solution and another - for second (with slightly different adresses) but I'm pretty sure that it's a dumb way to resolve the problem and everything can be resolved via iptables/ip route rules that I can't create. I've tried a dozen of "wizard manuals" and "howto's" to mix both solution but without success. Looking for an advice (and good reading links for networking begginers).

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  • How do I recover files from a corrupt VDI file?

    - by Eric P
    Is it possible to repair a corrupt VDI file? The OS on the VDI (XP) doesn't boot at all, it just hangs at a black screen. I was getting file errors before on its last boot, but now its not working at all. Sector viewer shows 'Invalid partition table Error loading operating system Missing operating system'. I tried mounting the file from the host OS, but it just says that the drive isn't formatted. I don't need to be able to run the VDI, but I do need some files that are on it. Is there any way to recover files from the corrupt VDI file?

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  • netkit: why cant my router 4 pc4 ping my router 1 pc1 - how can I solve this please?

    - by donok
    Below I have four routers connected but my pc1 on r1 cannot ping my pc4 on r4 and also my pc2 on r2 cant ping my pc4 on r4 and vice versa. Below is a network diagram: and the configurations are below that, could anyone help me please on making them accessible? ![connecting 4 routers][1] I cant post my diagram on serverfault(less than 10 rep) so I did on stackoverflow and asked the same question. pc1: ifconfig eth0 195.11.14.5 netmask 255.255.255.0 broadcast 195.11.14.255 up route add default gw 195.11.14.1 dev eth0 pc2.start: ifconfig eth0 200.1.1.7 netmask 255.255.255.0 broadcast 200.1.1.255 up route add default gw 200.1.1.1 dev eth0 pc3: ifconfig eth0 195.20.14.9 netmask 255.255.255.0 broadcast 195.20.1.255 up route add default gw 195.20.14.1 dev eth0 pc4: ifconfig eth0 200.2.1.11 netmask 255.255.255.0 broadcast 200.2.1.255 up route add default gw 200.2.1.1 dev eth0 r1: ifconfig eth0 195.11.14.1 netmask 255.255.255.0 broadcast 195.11.14.255 up ifconfig eth1 100.0.0.9 netmask 255.255.255.252 broadcast 100.0.0.11 up route add -net 200.1.1.0 netmask 255.255.255.0 gw 100.0.0.10 dev eth1 route add default gw 100.0.0.10 lab.conf: if you need more on that Ill post it up but I think most of the info is there. Any help would be greatly appreciated especially trying to make a connection between pc4 and pc1, even if you think it does not make sense please explain why. Thank you.

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  • how do I access a server inside a VM?

    - by user13743
    I setup virtualbox running debian for website development inside of Windows 7. Can I access that webserver running inside the VM from Windows 7? I tried going to 127.0.0.1 and FF said there's no server, so it looks like it's not running automatically.

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  • Is it possible, and is it advisable, to host a mail server on a Windows Azure VM role?

    - by JcFx
    I know this question has been asked on various forums before, and that all the answer were negative, but many of the answers are quite old, and with Azure developing so quickly it seems useful to ask it again. Can we run a mail server (such as mailenable) on an Azure VM? And if not, why not? I've seen one posting on the MS forums (here) that suggests the IP of the Azure machine would be blacklisted as a source of spam. Why would this be (as opposed to hosting a mailserver on a dedicated box)?

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  • WinXP on VPC - Unable to change the way users log on or off

    - by kamleshrao
    On my Win7 computer, I have setup a new Win-XP VPC. In the VPC window, when I click Ctrl+Alt+Del, it shows me Windows Task Manager. As per MS KB [ http://support.microsoft.com/kb/281980 ], we can change this behavior to show the regular Windows Security window. But while making this change, I am getting the following error: User Accounts Fast User Switching cannot be turned off from a remote connection to this computer. Log on to the computer locally to turn off Fast User Switching. OK Is there any way I can fix this setting?

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  • Rails Hosting - Is RailsPlayground.com a Good Host?

    - by stringo0
    My team is currently looking into hosting for RoR apps, and we're considering RailsPlayground, Linode and SliceHost. We haven't found anyone recommending rails playground, and web of trust seems to caution against it - http://www.mywot.com/en/scorecard/railsplayground.com I like the fact that they give you a sourcerepo account for free to host and track git repos, etc. The Questions: Is there any reason not to go with RailsPlayground? Have you had any negative experiences with RailsPlayground? (Feel free to share positives as well) Thanks!

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  • Not able to use FTP acount created with pure ftpd

    - by user1513613
    I made the new user using this command pure-pw useradd droa -u 52007 -g 52009 -d /home/droa/public_html But when i connect using ftp , it says that Login authentication failed. Which other setting i need to use. I also have cpanel where i sued to create accounts. Even i checked the /etc/pureftpd.passwd File as well , but it only had one user which i created. I don't know which ftp does cpanel uses. The documentation of pureftp says that i need to compile with (--with-everything) Is there any way to do that without re-compiling

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  • VirtualPC/XPMode... trying to let a VM access pages served using IIS on the host machine

    - by John
    My host PC is running IIS7.5 under Windows7. I have a VM running XP to let me use IE6, but I've no idea what network settings on the VM/host are needed so the VM can access pages on the host. I thought if the host was 192.168.1.1, then from the VM I'd simply do http://192.168.1.1/... if I do this on the host it works but the VM can't see it. I'm assuming there are some shortcuts here rather than manually having to set up loads of permissions, e.g a shortcut way of letting the VM access the host maybe?

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  • Is it secure to store the cert/key on a private AMI?

    - by Phillip Oldham
    Are there any major security implications to bundling a private AMI which contains the private key/certificate & environment variables? For resiliency I'm creating an EC2 image which should be able to boot and configure itself without any intervention. After boot it will attempt to: Attach & mount specific EBS volume(s) Associate a specific Elastic IP Start issuing backups of the EBS volume(s) to S3 However, to do this it will need the private key/pem files and will need certain environment variables to be available on start-up. Since this is a private AMI I'm wondering if it will be "safe" to store these variables/files directly in the image so that I don't need to specify any user-data information and can therefore start a new instance remotely (from my iPhone, if needed) should the instance be terminated for any reason.

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  • How to add addtional disks to a Windows 2008 KVM based Guest?

    - by taazaa
    I have a Win 2008 KVM based guest VM running on a Ubuntu 10 host. It is a raw image of 22G. I want to add a "data" drive which would show up as "D:\" drive on the guest. I first created a raw image using: qemu-img create -f raw ~/vmdisk2.img 50G Then, tried attaching it using virsh attach-disk. When that did not work, I tried editing the xml file of the VM directly. Both did not seem to work. I would greatly appreciate any help on how to do this and what the best practice is. I want to keep the base image small, so that I can clone it (hopefully) and then attach necessary storage based on the application at hand. Update: The xml of the vm before adding the second drive: <domain type='kvm'> <name>win08e-vm1</name> <uuid>183a4ba0-1c0b-0b04-ad01-aa7c3a4cb390</uuid> <memory>1048576</memory> <currentMemory>1048576</currentMemory> <vcpu>2</vcpu> <os> <type arch='x86_64' machine='pc-0.12'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='localtime'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/var/lib/libvirt/images/win08e-vm1.img'/> <target dev='hda' bus='ide'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/home/taazaa/iso/Win08ER264.iso'/> <target dev='hdc' bus='ide'/> <readonly/> <address type='drive' controller='0' bus='1' unit='0'/> </disk> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='bridge'> <mac address='52:54:00:7f:a7:ae'/> <source bridge='br0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <input type='tablet' bus='usb'/> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes' keymap='en-us'/> <video> <model type='vga' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </memballoon> </devices> </domain> Thanks!

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  • Error while trying to configure VLAN with Open vSwitch

    - by Abhishek Chanda
    I am trying to connect a number of VMs using Open vSwitch. The VMs are on two separate physical boxes. Here is what I did: Created two tap devices on one physical host sudo ip tuntap add mode tap tap0 and same for tap1 Bring them up sudo ip link set tap0 up Add them as ports to Open vSwitch (br0 was created as a OVS bridge previously) sudo ovs-vsctl add-port br0 tap0 tag=1 Now I booted the VMs (using VirtualBox) and assigned addresses 192.168.122.11 and 192.168.122.12. Now when I try to ping one VM from another, I get the error Connect: network is unreachable. Since both VMs are connected to the switch on the same VLAN, I expect to be able to ping one from another. What is going wrong here?

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  • Windows Server 2003 guest on Xen frequently stops responding

    - by smokris
    I'm running a Windows Server 2003 guest instance in Xen 3.x. This DomU runs fine for a day or two, then stops responding — I don't get any network response, and I can no longer connect to Xen's VNC console for this DomU. xm list shows this: Name ID Mem VCPUs State Time(s) Domain-0 0 6508 8 r----- 1161159.4 [A working Linux DomU] 1 512 1 -b---- 68711.1 [The hung Windows DomU] 5 512 1 ------ 67234.2 [Another working Linux DomU] 3 512 1 -b---- 163036.4 (What does the ------ mean? The xm manual explains what each of the six states mean, but not what no-state means.) If I xm destroy and then xm create the Windows DomU again, it boots right back up (with the Windows alert The previous system shutdown at [...] was unexpected.), and then stops responding after another day or two. I checked /var/log/xen/*.log, but no log messages are generated at the time the server stops responding. How should I proceed in troubleshooting this?

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