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• best practices for setting development environment

  - by Sharique

  I use Linux as primary OS. I need some suggestions regarding how should I set up my desktop and development. I do work on mostly .Net and Drupal, but some time on other lamp products and C/C++, Qt. I'm also interested in mobile (android..) and embedded development. Currently I install everything on my main OS, even I use it a little. I use VMs a little. Should I use separate VM for each kind of development (like one for .Net/Mono, another C++, one for mobile and one for db only, one for xyz things etc) Keep primary development environment on main os and moveothers in VM. main os should be messed up keep things easy to organize (must) performance should be optimal

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• Migrating from Apache2 to Lighttpd creating errors in PHP/mySQL?

  - by Jean-Philippe Murray

  Ok, I've been using basics ubuntu LAMP setups for years now, and I wanted to give lighttpd a try. My LAMP setup run in a virtual machine with scripts running just fine. So I created a new virtual machine, starting with a fresh install of ubuntu and made my setups. On this new VM, lighttpd + php works just fine. (Or at least it seems...) Problem occurs when I take the scripts from my LAMP setup and upload them to the new VM. I'm getting : Warning: mysql_real_escape_string(): Access denied for user 'www-data'@'localhost' (using password: NO) My lighttpd setup is configured as php-cgi but not my apache2 setup. Could this be the source of the problem? I think that scripts would be independent of the server configuration, so I doubt it. Also, I know that my DB connexion informations are good (as I can log in via phpmyadmin perfectly). I'm in the dark here, any pointers ? Thanks,

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• Intel VT-x disappeared after upgrading to Windows 8

  - by StepTNT

  I've upgraded to Windows 8 some weeks ago (MSDNAA!) and today, while I was trying to run a VM, I've noticed that VT-x is disabled. Now, Hyper-V works without problems, as I've tried emulating Win7 and WP8; but VirtualBox says that VT-x is disabled and it can't run my VM. Just to double check, I've run Securable by GRC and the Intel utility and both says that I've got VT-x off. Here comes the problem: VT-x is ON in my BIOS, and it worked flawlessly before upgrading to Windows 8! Any kind of suggestion? EDIT: My CPU supports VT-x: http://ark.intel.com/products/52219

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• Adding IP address to OpenVZ VPS (OpenVZ Web Panel)

  - by andy

  I apologise if I sound at all dumb. This is my first dedicated server having used a VPS for over a year and I'm trying to setup a VPS on this new server. I purchased a subnet from my hosting provider that I believe allows me 6 usable IP addresses: 177.xx.xxx.201 - 177.xx.xxx.206 The subnet address looks like this: 177.xx.xxx.200/29. I've gone on my server and added them like it said on a wiki like so: ip addr add 177.**.***.201/29 dev eth0 I done that for all six and now when I go to them in the browser they point to my server. The problem is, I'm using OpenVZ web panel to create VMs (http://code.google.com/p/ovz-web-panel/) so I created a VM and assigned one of those IPs to it. However when SSHing to that IP it SSH's to the dedicated server and not the VM. Am I missing something?

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• Microsoft Office 2007

  - by nardone25

  Hello everyone in serverfault. I am having a big problem at my job. I will let everyone know what I am using. I have two ibm x3690 servers with vmware esxi on both. Our product server has 8 vm on there. I have two lefthand san from HP. I have a watchgurd firewall. Our other site. I have one server over there ibm x3b90 sever. with one vm on there. I have a cisco 1700 router. and another watchgurd firewall. I have a vpn tunnel to my watchgurd firewall, to my cisco router. Site one works great. site two is having problems saving word documents and having problems printing in publisher 2007. Can someone please help?

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• VirtualBox - split partitioned VDI into separate VDIs

  - by mathematical.coffee

  I'm very new to VirtualBox. I set up an Arch Linux VM and a Ubuntu VM (Ubuntu host), both sharing the same .vdi like so (I had in my mind a dual-boot situation): VDI file (25GB) |- /dev/sda1: 5GB (Arch Linux) |- /dev/sda2: [Ubuntu] |- /dev/sda5 (swap, 1GB) |- /dev/sda6 Ubuntu /, 9GB |- /dev/sda7 Ubuntu /home, 10GB I've now realised that I don't want a dual-boot-type setup, I'd rather boot each machine independently (my initial thought was to share /home between Ubunto and Arch). So, my question: Can I split /dev/sda1 and /dev/sda2 each to their own .vdi files so I can use them as completely separate machines? I'd rather not have to re-install either Arch (because it took me ages to work it out!) or Ubuntu (because I've already done a few GB of updates and don't want to redo them). I haven't been able to find anything about this - most questions I see are about converting a .vdi to a partition on the host, or splitting a .vdi into multiple smaller files (that are not independent), or converting a partition on the host to a .vdi file. cheers.

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• Connection to SQL Server 2008 R2 Database Server is SLOW

  - by AbeP

  The database server is a VM running SQL Server 2008 R2 on top of Windows Server 2012, 24GB RAM allocated and 2TB of disk space. Overall, the database connections are very slow and one thing that stands out is that the connection to the database server via SSMS takes 5-10 seconds. On other much less powerful servers, it takes 1-2 seconds. The VM is technically way more powerful than other machines, but the connection to the server is too slow. So, my guess is the issue is network related, but any clues on where I should be looking? Thanks!

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• How can I delete virtual networks from command line?

  - by David Cobb

  I have Hyper-V Server 2008 R2 (without GUI) running at my colo for a week. I was connected via RDP and could use the menu interface and command line. I figured out how to connect Hyper-V Manager from my Win7 laptop (THANK YOU HVREMOTE!), and created and installed my VM. I created a virtual network that didn't work (no connectivity from my VM) so I created another using different settings, and now have lost access to the Hyper-V host. No ping, no RDP. Since I don't have console access, I cannot troubleshoot. I believe if I deleted the Virtual Networks I'd regain access, but I need a command line instruction for this, that the staff onsite could enter to accomplish this. I find no help anywhere obvious (MSDN, etc), the keywords are too general. Can anyone refer me to simple steps how to do this over command line or with the menu based interface on the console?

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• Virtual Machines: What components should I upgrade to improve running virtual machines?

  - by joshsvoss

  at work I need to have one or sometimes two instances of a vmware virtual Windows 7 machine running on my real Windows 7 machine. The computer I'm using is Dell Precision 490 from 2009 I believe, possibly earlier. Running Windows 7 ultimate. Problems while running VM's: The entire computer slows down when a vmware instance is running. Pages take a while to react to a scroll, applications take forever to launch, and programs hang both in the virtual machines and on the real one. So, what components should I upgrade to improve this? I guess a more pointed question would be, which components will help the most? Possible options: Getting 8gb of RAM instead of 4gb new graphics card new processors? (Is that really an option?) My intuition tells me it will be a combination of the RAM and graphics card. There is also the possibility that an '09 tower just isn't cut out for vm's and our business should purchase a new tower.

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• How to setup a simple self-hosted dynamic DNS server

  - by Cerin

  I have a small internal network of physical machines running hypervisors, which in turn run several KVM Ubuntu virtual machines. How would I setup an internal dynamic DNS server so that when I run a script to create a new virtual machine, that VM could automatically register itself in the DNS server? Bind seems to be the standard DNS server for Linux, but it seems designed for a much more "static" DNS model. Dynamically updating this would require a complicated script that would have to SSH into the DNS server, edit configuration files, and then restart the server. This doesn't seem like a very elegant solution. Are there better options? I saw a similar question, although they're asking for a solution for a public setting on Amazon. My servers are entirely private, and I don't want to rely on an external VM host or Dynamic DNS provider.

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• Flexible virtualization infrastructure Design with libvirt

  - by Lessfoe

  I'm going to install a CentOS6 Server with Virtualization ( libvirtd ) capabilities on a DELL Server with Hardware RAID5 of around 6T of disk space ( It has 4x2T disks in a PERC700 RAID Controller ). I'm going then to install some guests which requires few resources except one that needs 500GB of disk space, 8/16GB of RAM and good performances. I was thinking about file images for guests storage but I'm not sure about the 500GB VM what needs good performances so that an LVM device could be better. So my question is what would be the best layout concerning: RAID setup ( RAID5, RAID1 + 1 disk for OS only. ) disk partitioning ( using the entire disk/ leave free space for future use and extending it with LVM ) guests storage management ( LVM devices or file images ( considering the 500GB VM that is performance demanding ) or mixed ) Where to put guests storage? /var/lib/libvirt/images or maybe in a custom dir separated from system /home/VMs Thanks in advance for any hint.

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• SCVMM upgrade scenario

  - by pigeon

  I've read some information on TechNet about upgrading SCVMM 2008 - 2012 but can't quite figure out the best way to approach this. The current setup is that we've got SCVMM 2008 R2 installed but against best practice it was actually installed on the Hyper-V host machine since its a small scale deployment its just a single server setup with SCVMM existing on the same host rather than be in a VM. So from what I've read an in-place should be possible which will incur a restart but also don't have the luxury of another server to shift the VMs onto whilst doing this or want to risk anything happening to the Hyper-V role. Ideally I would probably prefer just to get SCVMM 2012 into a VM of its own and remove the 2008 version from the host machine. Anyone done an upgrade on this or have any recommendations about how to approach this?

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• Migrated Virtual Machine Shows Up in Both Datastores

  - by Backstage

  Hi, We're using Vsphere client 4.0.0 Build 208111 with Virtual Center Server same version and same build. I have one vm with only one disk that is shown on 2 different datastores. If I look through VMs and Templates I see only 1 vm. If I look through Datastores screen, I see it in datastore-002 and datastore-003. If I go to settings of the virtual machine on datastore-002 and check the disk, I see the path as datastore-003. How can I fix this ?

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• Static Routes and the Routing Table

  - by TheD

  This is very much a learning question if someone would be happy to explain a couple of concepts. My question is - the default routing table that exists in, in my case, a default Windows 7 install, what do each of the routes in the table do? Here is a screenshot: The 10.128.4.0 is just a route I've added while messing. I understand from a question I posted on Superuser the first route is just a default route that will route all traffic for any IP to my default gateway on my Interface in use. But what about the others? And how would the routing table handle a machine with multiple NIC's, perhaps connected to two different networks, or maybe even two NIC's on the same network so a VM can have a physical Network card instead of each VM sharing the hosts. Thanks!

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• Natively boot Virtualbox Image

  - by isync

  I am faced with a Windows hardware/software problem left over from another person. It's on me to resolve. It's a mission critical setup. The situation is: I've got a physical server machine with: -Disk C:\ (one disk) containing a basic install of Windows Server 2008 R2, formerly Win Vista Pro, now gone. -Disk D:\ (software Raid) containing a VirtualBox disk image of a configured Windows Server 2008 R2 running SQL Server R2 among others. What shall I do now? Migrate all the stuff from the configured VM to the basic but natively installed C:\ Windows Server 2008 R2 (with the possibility of breaking stuff)? Or, Setting up the machine to "natively boot" the VM with the help of bcdedit.exe (something I've read about, what I've never done, what I don't know of if it works, if it hits performance, or if it is stable for production) For me, being old skool, I am in the process of de-virtualising everything (option 1). But I'd be happy if someone suggests I am ok to go down the "natively boot" route.

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• VMXNET3 nic loses the ability to update ARP table after N hours

  - by Peter

  I have a fedora 18 VM that stops updating the arp table on eth1 after running for a number of hours to days. There are other VMs on the same hypervisor that can access all of the same networks without issue. A tcpdump of the offending NIC shows only ARP broadcasts but no responses. None of the other VMs on the vDS see the ARP broadcasts from the offending NIC. The only way I can currently solve the problem is to reboot the VM and then everything works for a while. I've tried changing the port on the vDS and even flipping the network configurations after I lose eth1's ARP table, but the ARP problem follows eth1 but I can access the machines that were originally on eth1. If I statically add the arp entries for machines on the same subnet I have no problems with connectivity. The Hypervisor is an HP BL49X series with flex-10 network modules. Has anyone seen anything like this before?

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• sysprep failure on Windows Server 2008

  - by dushyantp

  Before deploying a Azure VM Role, we need to perform %windir%\system32\sysprep\sysprep.exe /generalize /oobe /shutdown But in my case the sysprep fails with the log file %windir%\system32\sysprep\Panther\setuperr.txt saying: 2012-07-05 08:03:57, Error [0x0f0073] SYSPRP RunExternalDlls:Not running DLLs; either the machine is in an invalid state or we couldn't update the recorded state, dwRet = 31 2012-07-05 08:03:57, Error [0x0f00ae] SYSPRP WinMain:Hit failure while processing sysprep cleanup external providers; hr = 0x8007001f I do not always want to create a new image. Is there any work around? I followed the instructions in MS support here and tried: %windir%\system32\sysprep\sysprep.exe /generalize /oobe /shutdown /unattend:.\unattend.xml It did not work. Under certain circumstances, I need to tear down the VM Image from azure and re-deploy with some more changes. So sysprep has to run almost twice every week.

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• Windows 2008 Incoming Connection: Where/How is Server IPv4 address defined

  - by revelate

  We're evaluating a VM hosted externally which runs Windows Server 2008 R2 Web Server Edition and wish to access it via a VPN connection for maintenance and administration. RRAS isn't included in Web Server Edition, but it does have a form of VPN server called "Incoming Connections". This appears to work well and even supports multiple simultaneous connections. As we'll be using this VPN regularly we'd like to know if this is a viable solution or if we'd be better off upgrading to Standard Edition and full-fledged RRAS. In particular we're accessing the VM via the Private IP given by the Incoming Connection (currently 169.254.135.207) so we'd like know: if the server private IP might change every so often? if so is there any way to define it manually? or should we be using the server name rather than the private IP address? if so how can we be sure that it will resolve correctly? Name resolution over the "Incoming Connection" has worked on and off during our tests. Thanks for your help

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• Rip authedicatation from LDAP to Local

  - by oxinabox

  We are taking a small portion of out network offline, and running a separate network using that portion. (By small portion I mean 2 servers, that will be connected to 30 odd boxs that aren't usually part of our network, and don't need to authenicate) I intend to create a VM on one of the servers to provide general user services, and IRC server, remote shell etc. And I would like the users to be able to use there usual server log in details. Problem is the LDAP server that normally checks those details is not one of the severs. So I need to be able to some how take their details off LDAP and put them on the the server that is coming. One suggestion I had was to set a LDAP server on the VM locally, and clone the LDAP database onto it (using something called slapcat) is this the best way? Or can I I change the LDAP data into local authentication data?

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• diskpart on RDM's ...

  - by karnash

  HI, We have ESXi cluster which is attached to clariion CX4 We have windows 2008 R2 as the guest OS. Attahed to this vm is 2 x 1.95T RDM's I select disk 1 create partition primary size=1 (1MB) then list partition Partition ### Type Size Offset * Partition 1 Primary 1024 KB 1024 KB Then I do the same for the other disk and offset is 1024KB I need to present 4T disk to this vm so I right click on disk 1 convert to simple volume then extend it by adding the second disk now when I do list partition, I see the off set is set to 31k. Can anyone please guide me. Thanks

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• Virtual DNS recommended setup...

  - by luison

  Hi. We are new to virtualization which we are setting up with Proxmox VE (OpenVZ + KVM). I am a bit lost about the recommended DNS forwarder config specially in the OpenVZ (Virtuosso type) of enviroiment. Our intention was to have a small dnsmasq running in one of the VM acting as backup DHCP server and serving our in-office local addresses (and PCs) by an additional resolve.conf file which dnsmasq supports, but I've read that all VM should share DNS pointing to the host machine in which case it would make more sense having it there. My problem is that I would like to have as least as possible apps in the host so a reinstall of the environment (porxmox ve) and a machine restore can be as quick as possible. Does anyone have a similar setup? Does it make sense to have the 1st virtual machine running the local dns forwarder? Also... dnsmasq seems to want to have root permissions when running on an OpenVZ container... are there any work arrounds anyone knows for that.

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• VirtualBox: Host OS processor is spiked while guest OS virtual processor is idle?

  - by Greg Mattes

  I'm running Windows XP 32-bit on Windows Vista 64-bit with VirtualBox 3.0.6. Whenever I run the XP VM, Vista (host) reports 100% cpu utilization even though XP (guest) reports between 1-5% cpu utilization. The host box has 2 GB of physical RAM. The guest/vm is configured with 512 MB. The host box has a 64-bit AMD processor. No apps (other than VirtualBox) are running on either host, they're just idling. Any guesses as to why the host processor is spiked? I've enabled various advanced features for the XP guest in the hopes of having better performance: Settings → System → Motherboard: Enable IO APIC Settings → System → Processor: Enable PAE/NX Settings → System → Acceleration: Enable VT-x/AMD-V and Enable Nesting Paging

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• pgAdmin cannot connect to PostgreSQL 9.1

  - by Nyxynyx

  I am trying to use pgAdmin on Windows to connect to postgresql 9.1.8 running on localhost's Ubuntu 12.04 VM. The host's port 5432 forwards to VM's port 5432. pgAdmin Error: Error connecting to the server: could not receive data from server: Software caused connection abortion (0x00002745/10053) postgresql.conf #------------------------------------------------------------------------------ # CONNECTIONS AND AUTHENTICATION #------------------------------------------------------------------------------ # - Connection Settings - listen_addresses = '*' port = 5432 pg_hba.conf local all postgres peer # TYPE DATABASE USER ADDRESS METHOD host all all 0.0.0.0/0 md5 host all all 127.0.0.1/32 md5 host all all ::1/128 md5 netstat -nlp | 5432 tcp 0 0 127.0.0.1:5432 0.0.0.0:* LISTEN 29035/postgres unix 2 [ ACC ] STREAM LISTENING 50823 29035/postgres /var/run/postgresql/.s.PGSQL.5432 iptables rule iptables -I INPUT -p tcp --dport 5432 -j ACCEPT PostgreSQL service has been restarted and pgAdmin still gives the error. Any ideas what have caused it?

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• Virtual Box Networking; How to configure bridged networking on Windows 7

  - by Krist van Besien

  I have VirtualBox on Windows 7. I have two virtual machines running RHEL, that work fine when the network is set to NAT. However I want to change the network adapters for the VM's to bridged in stead of NAT. However when I go in to the VM configuration, and select bridged I also need to select an adapter, but there is nothing to select. Apparently I need to install a separate driver/filter on the network adapter. However I don't know where to start. I reinstalled VirtualBox (latest version) but did not see an option to install such driver. What should I do?

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• xen-create-image does not create inird or initramfs image and domU does not starts with system image

  - by user219372

  I have Fedora 19 as Dom0. To create image I run # xen-create-image --hostname=debian-wheezy --memory=512Mb --dhcp --size=20Gb --swap=512Mb --dir=/xen --arch=amd64 --dist=wheezy After generation finished I start vm and see: # xl create /etc/xen/debian-wheezy.cfg Parsing config from /etc/xen/debian-wheezy.cfg libxl: error: libxl_dom.c:409:libxl__build_pv: xc_dom_ramdisk_file failed: No such file or directory libxl: error: libxl_create.c:919:domcreate_rebuild_done: cannot (re-)build domain: -3 In the /etc/xen/debian-wheezy.cfg i have # # Kernel + memory size # kernel = '/boot/vmlinuz-3.11.2-201.fc19.x86_64' ramdisk = '/boot/initrd.img-3.11.2-201.fc19.x86_64' and ls -1 /boot/*201* shows /boot/config-3.11.2-201.fc19.x86_64 /boot/initramfs-3.11.2-201.fc19.x86_64.img /boot/System.map-3.11.2-201.fc19.x86_64 /boot/vmlinuz-3.11.2-201.fc19.x86_64 Then if I fix ramdisk directive in .cfg file to /boot/initramfs-3.11.2-201.fc19.x86_64.img vm will start but os inside will not boot. In a tail of xl console I get [ OK ] Reached target Basic System. dracut-initqueue[130]: Warning: Could not boot. dracut-initqueue[130]: Warning: /dev/disk/by-uuid/085883ad-73ca-45cc-8bc5-e6249f869b26 does not exist dracut-initqueue[130]: Warning: /dev/fedora/root does not exist dracut-initqueue[130]: Warning: /dev/fedora/swap does not exist dracut-initqueue[130]: Warning: /dev/mapper/fedora-root does not exist dracut-initqueue[130]: Warning: /dev/mapper/fedora-swap does not exist dracut-initqueue[130]: Warning: /dev/xvda2 does not exist Starting Dracut Emergency Shell... Warning: /dev/disk/by-uuid/085883ad-73ca-45cc-8bc5-e6249f869b26 does not exist Warning: /dev/fedora/root does not exist Warning: /dev/fedora/swap does not exist Warning: /dev/mapper/fedora-root does not exist Warning: /dev/mapper/fedora-swap does not exist Warning: /dev/xvda2 does not exist Generating "/run/initramfs/sosreport.txt" Entering emergency mode. Exit the shell to continue. Type "journalctl" to view system logs. You might want to save "/run/initramfs/sosreport.txt" to a USB stick or /boot after mounting them and attach it to a bug report. dracut:/# .img files in /xen/domains/debian-wheezy exists and listed in disk section of debian-wheezy.cfg So what should i do? Update: I've found that xl does not mount images. In debian-wheezy.cfg I have that: root = '/dev/xvda2 ro' disk = [ 'file:/xen/domains/debian-wheezy/disk.img,xvda2,w', 'file:/xen/domains/debian-wheeze/swap.img,xvda1,w', ] And there is no /dev/xvda* or /dev/sda* or /dev/hda* files in VM.

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