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• Multiple VM environment for developing/testing

  - by Hippo

  I was asked to create a setup for automated deployment, configuration, installation/updates of websites. A bunch of small websites will be bundled on one server. If more website will come up a new server will be created... I decided to us chef for this task. All servers will be running Ubuntu at the same version and configuration. The actual question: Everything needs to be tested properly before starting live deployment, so my question is: What is the best virtualisation tool to run multiple (5 - 10) virtual machines on a Ubuntu Laptop? Requirements: easy setup, fast (clone/snapshot of VMs) All VMs should be easily connected to the internet and should be able to communicate to each other (Open-Source / free would be great) So far I looked into: Virtual box is more for Desktop virtualisation, Cloning not possible, every new machine needs to be installed VMware Player Any suggestions? If there are any question about what I am doing please comment on this question, I will answer as soon as possible. This question is not about the actual set up, it is about a nice working environment.

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• Tuning Windows 7 for use in a VM

  - by intuited

  I'm running Windows 7 in a VirtualBox Virtual Machine, and would like to make it run in a more streamlined fashion. I'll be using the install primarily for testing web apps, and have no need for it to run quickly. I would like it to run with minimal memory requirements, and with minimal changes to its virtual hard drive's contents. Changes to the hard drive contents, for example the paging file, result in larger snapshot sizes. Another recent post of mine seems to be related to this issue, but does not directly address issues with Windows. One concern that I have is that Windows seems to be using 17% of its paging file even with over 900MB of memory marked "Standby" or "Free". My uneducated guess is that this is being used to store indexes or some other data that helps to speed up the system but is not really necessary. I'm also wondering if it's normal for Windows to use over 500 MB of "In Use" memory with no apps running. Will this amount decrease if I reduce the amount of "installed" memory in the VM? What steps can I take to reduce the system's memory footprint without incurring an increase in paging file usage?

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• What USB key would you recommend using for running a Windows 7 VM off of?

  - by Darryl Hein

  Because I can't find a good PHP editor for OSX, I develop in Windows with PhpEd. At the moment, my development time is split between a desktop and a laptop. To partially solve the problem of having 2 different environments, I have installed a virtual machine (through Virtual Box) and put the hard drive file on an external hard drive. At the moment, I've been connecting it through Firewire 800. I have 2 problems with this setup: (1) The hard drive is fairly large so to carry the laptop and hard drive I pretty much require a backpack. (2) The hard drive requires quite a bit of power and therefore reduces the battery life (by about 40%). My thought is to move the VM hard drive onto a USB key. I realize it will be slower, but as I'm just using it for PHP development, there isn't a lot of disk activity in the VM. The only really intense time is boot up, otherwise, it just about sits idle. Do anyone have any suggestions on a USB key to use for the VM? It would need to a minimum of 32GB.

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• Performance tweaks and upgrades for VMWare Server 2

  - by sjohnston

  Our software department has a server running VMWare Server 2. We typically have 8-10 VMs running as test environments (Win XP and Server 08) for various versions of our software, and one VM that is used as a build server (Win XP). The host is running Server 2003 R2. It has 32GB RAM, 8 core Xeon 3.16GHz CPU, one disk for host OS and two raid disks for VMs. The majority of the time, this setup behaves very well and there are no complaints. Other times, the VMs can be very laggy. This is sometimes, but not always, correlated to heavy load on the build server. I'm a software developer, not an IT pro, but it seems to me that this machine should be beefy enough to handle this many VMs. Is this occasional performance hit likely just because we're hitting the limits of the hardware, or should I be looking for another culprit? From what I've read, I'm guessing if there's a bottleneck, it's probably disk I/O with all these VMs running off two disks (especially the build server). Would spreading the VMs over more disks, and/or switching to SSDs give us a significant performance boost? Other things I've read may increase performance: single virtual processor per VM removing/disabling unused virtual hardware preallocated disk space not using snapshots setting a reserved memory limit on the host and disabling VM memory swapping Can anyone confirm or deny if any of these improve performance? What other good tweaks have I missed?

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• Installing 64-bit Ubuntu Server 12.04 LTS, on a VM with VMWare Player, on a 64-bit Windows 7 PC

  - by WannaBeAGeek

  I'm trying to create a VM, using VMWare Player, with an ISO image of Ubuntu Server 12.04 (LTS). The machine I'm doing the installation on has an Intel(R) Core(TM) i5 CPU, and runs 64-bit Windows 7 I managed to create the VM (gave username, password, configured network etc), but I can't install Ubuntu Server. First I get this alert : Binary translation is incompatible with long mode on this platform. Disabling long mode. Without long mode support, the virtual machine will not be able to run 64-bit code. For more details see http://vmware.com/info?id=152. When I click OK, I get another alert : This virtual machine is configured for 64-bit guest operating systems. However, 64-bit operation is not possible. This host supports Intel VT-x, but Intel VT-x is disabled. Intel VT-x might be disabled if it has been disabled in the BIOS/firmware settings or the host has not been power-cycled since changing this setting. (1) Verify that the BIOS/firmware settings enable Intel VT-x and disable 'trusted execution.' (2) Power-cycle the host if either of these BIOS/firmware settings have been changed. (3) Power-cycle the host if you have not done so since installing VMware Player. (4) Update the host's BIOS/firmware to the latest version. For more detailed information, see http://vmware.com/info?id=152. Then, when I click OK, my VM exists, and I get back to the VMWare Player home screen. I don't know much about hardware and virtualisation, so there might be some necessary info I'm not giving. Please don't hesitate to let me know what is missing in my post, for finding solutions. Thanks :)

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• Windows based development environment: HyperV, VMWare, or VirtualBox on development machine?

  - by bleepzter

  I am a software engineer with a little bit of an informal "support" functionality... I am trying to figure out what is the best possible approach to employing virtualization technologies into our development process. Since the code we develop is server-centric, testing it often requires a VM with specific software requirements. I used to use VM Ware player (free version) to run my VM's until both of my laptops started exhibiting issues with corrupted windows 7 services and dying hard drives. All leads pointed to VMWare, which by the way seems to be a solid product if you pay for the Workstation edition ($300). On a side note, I have always been a fan of the Windows Server product line. I think it makes for one of the best development environments out there - it is highly scalable, highly reliable, and very efficient. So to be fair I replaced the drives of the laptops and installed Windows Server 2008R2, VS2010 Ultimate SP1, SQL Server 2008R2, TFS Server 2010 and all other tools and API's needed do do my work properly. So now I am stuck with a bunch of VMWare VMs. I don't want to repeat of what happened before, and I certainly don't want to bog down my machine with an inefficient hypervisor or services that are not needed. Futhermore the VMDK hard-disk format used by VMWare is not compatible with the VHD format of Hyper V. It is my understanding that converting from one format to the other can only happen by Microsoft System Center Virtual Machine which I have downloaded from MSDN and ready to install. I guess the question at this point is: Does SCVM run as another service in Windows? Is it a memory hog? What is a better virtualization technology - Hyper-V or Virtual Box in terms of efficiency ease of use and most importantly - memory footprint? (Keep in mind the development environment already has a ton of services running such as TFS Server, SQL Server, IIS, etc...) How would you advise to proceed at this point so that the VMs are still used in the test process? Thanks Martin

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• VirtualBox with Ubuntu Server guest can't ping outside

  - by Danidan

  Here's my situation: an Ubuntu 12.04 Host running VirtualBox; two guest VMs running Ubuntu Server 12.04 home network, so my Host pc has a wireless connection to the router of my ISP. My problem is in one of the virtual machines: it has 3 NICs, one in NAT mode and the others in Host Only mode. My purpose is to use eth0 (NAT) for Internet access and eth1, eth2 (Host Only) for management of internal virtual network (eth1 uses a VBoxNet with this IP 192.168.69.254). Whenever I try to $ping 8.8.8.8 I get Destination Host Unreachable. While if I $ping 192.168.69.10, that is the IP of the other VM, it works. I can't also ping my Host nor my router My /etc/network/interfaces file is: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp auto eth1 iface eth1 inet static address 192.168.69.1 netmask 255.255.255.0 auto eth2 iface ifconfig $IFACE 0.0.0.0 up up ip link set $IFACE promisc on down ip link set $IFASE promisc off down ifconfig $IFACE down $route -n returns: Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 10.0.2.2 0.0.0.0 UG 100 0 0 eth0 10.0.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 192.168.69.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 192.168.100.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0 Forgetting for now what eth2 needs to do and its setup, why I can't go outside the Host box? What can I do to help you helping me? :-)

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• Emails sent from Coldfusion using the same SMTP/Exchange server works from one machine but fails for another

  - by Peter Herdenborg

  First, apologies if this question is too vague or has too little information to really be answerable. I am not normally working with these issues, and I don't have full access to the environment. However, the hosting provider seems to have a hard time tracking down the issue, so I am hoping that someone can at least provide me with some qualified guesses about the most likely problem. Here goes: A client I work for has a hosted IT environment, based on virtual machines running Windows 2008 R2 Standard. Our website, based on Coldfusion 9 was recently migrated from one virtual machine to another, and though Coldfusion is configured in the exact same way, using the same SMTP server, i.e. the client's Exchange server hosted in the same environment and in the same AD as both web servers, sending emails to external recipients is no longer working. It is still working fine when testing from the old machine. This is what I've learnt so far (all emails are sent using a valid from-address on the client's domain): Emails sent to other recipients on the same domain are delivered without any problem. Emails sent to external recipients on other domains are never delivered. When sending emails to both internal and external recipients, no emails are delivered. When receiving one of these emails to an internal address, the sender is now indicated as "[email protected]", while when sent from the old machine, it used to say just "sender". This seems to me that it could hint that the Exchange machine "recognizes" the old web server while it is a stranger to the new. In Coldfusion's mail log, all messages appear to be successfully delivered to the SMTP server. Any ideas what settings to look at, what log entries to search for or how to compare the old web server with the new one will be highly appreciated.

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• Is there a way to use VirtualBox without using it's resource registry?

  - by Catskul

  Summary VirtualBox seems to want everything to be "registered" which makes it much more annoying to work with on the command line. I'm attempting to create an automated script which will create, move, start, stop, and destroy virtual machines and virtual disks. Requiring registration will complicate the task for the following reasons. leaves state information around that can cause unpredicted edgecases causing scripts to fail. creates potential name space collisions for multiple process creating VMs with the same name moving/copying resources on the same machine is more complicated because references in the registry need to be updated copying resources (disk + vm combination) to another machine require reconfiguration once they reach their target machine, and require the transfer of extra meta data to do the reconfiguration. If something unexpectedly fails, and an unregister thus fails to happen, left over configuration information can cause problems in subsequent runs. Use Case My specific use case is for a continuous integration server which creates and destroys VMs and Disk images potentially with the same name, and would require more logic to deal with the registry's statefulness. Imaginary Example It seems that I should just be able to for example (using some imaginary and/or incorrect commands): mkdir foobar customdiskimg_script ./foo/foo.vdi vboxmanage createvm --name "foo" --ostype Linux --basefolder ./foo/foo.xml vboxmanage storagectl ./foo/foo.xml --name foo --add ide vboxmanage storageattach --storagectl foo --medium ./foo/foo.vdi ./foo/foo.xml vboxmanage startvm ./foo/foo.xml TLDR Is there a way to use virtualbox without "registering" harddisks and VMs?

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• linux: per-process monitor, every 10 minutes, with history access

  - by Inbar Rose

  I really didn't know a better way to ask my question, hence you get a horribly named question. I will explain what i want to do, maybe that will help you help me. I would like to have my linux machine continuously monitor (every 10 minutes) all the processes on my machine. The information from each process that I require is the name, CPU usage, allocated (virtual) memory, and resident (ram) memory. If these periodic reports were to be looked at, they would look something like this: PROCESS CPU RAM VIRTUAL name1 % MB MB name2 % MB MB ...etc..etc These reports should be stored in such a way that I can access them at a later date by giving a date/time scope (range). For instance, if I want to see the history of my processes from 12:00:00 1.12.12 till 12:00:00 2.12.12 I can - and it should give me the history of the processes for every 10 minutes between those date/time borders. The format of the return is not important, that will be handled by a script anyway and can be modified into anything I need. I have looked into a few things so far, but have not found something that clearly meets my needs. Among the things i searched: sar, free(1), top(1).. and a few other things. It should be a simple issue, i can already see all this information by simply looking at my htop, but i need only a tool that will gather the desired fields for me for each processes every 10 minutes, and then also let me extract slices of that data based on date/time scopes (ranges). note: I have limited experience with linux, so please give detailed information. note2: The desired output will be something like this (after receiving the desired range) CPU USAGE BY PROCESS: proc_nameA 1,2,2,2,2,2...... numbers represent % usage every 10 minutes... proc_nameB 4,3,3,6,1,2...... The same idea with the other information.

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• Ubuntu 12.04 VirtualBox on powerful W7 quite slow

  - by wnstnsmth

  I own a Thinkpad T420s with 8GB RAM, 160 GB SSD and a quite fast i7 processor. Summa summarum a very fast computer that works perfectly. Now, I am not very impressed by the performance of my Ubuntu 12.04 virtual machine running on VirtualBox 4.1.18. I assume that Virtual Machines are always a bit slower than the guest system, still I think it should be more performant given the hardware settings I give it: 4096 MB RAM 1 CPU without CPU limitation (I would like to give it more but then it does not seem to work - I am not experienced in this maybe somebody could give me advice on this too) Activated PAE/NX, VT-x/AMD-V and Nested Paging 96 MB Graphics Memory (no 2D or 3D acceleration) ~ 14 GB disk space, currently about 7 GB are used Maybe I misconfigured something, could you give me a hint please? Thanks! Edit: What I mean by slow is that for example switching tabs in the browser (whether FF or Chrome) only goes with a 0.5s delay or something, as well as switching application windows and/or double-clicking applications in the dock to get all open windows.. opening Aptana takes about a minute whereas opening something like Photoshop on the guest system takes 5 seconds

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• VM automatic provisioning advice

  - by jdgregson

  In my lab we have 24 workstations, each with five technician-maintained virtual machines set up in VMware Workstation. These provide a lot of management overhead, as we have to update them as well as the host operating systems every three months (the start of the next quarter), which adds up to 144 systems to update instead of just 24. Whenever we need to reimage the hosts, the VMs add another 130GB to each image, which is over 3TB of extra data to send over the network, and a lot more time to apply each image, and then we still have to boot all 120 VMs and assign them a unique IP Address and host names. We would like to get the VMs off the hosts and onto a server, but after looking around for a few days, I still don't know where to begin looking for a solution. There may be a better way to do this, but in my mind, the ideal solution would be to replace the VMs on the host machines with five Thin Client operating systems, each configured to connect to a server and be sent or connected to a unique virtual machine. We can't have 120 VMs running on the server all the time, so the server would have to create a copy of the VM from a template whenever a student tries to boot one, and destroy the VM after the student is finished with it. If there is another client application that has to be installed on the hosts that would be fine, the only reason I'd like to keep them in VMware Workstation is because students already know to look there for the VMs when they need to use them. What, if any, virtualization software will allow this? Is there some other solution I'm not seeing?

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• Quick Java question about variables

  - by Spencer

  I'm declaring a variable: private static final String filename = "filename.txt"; First, does the order of private static final matter? If not, is there a standard excepted sequence or convention? Second, the filename in my application is fixed. Is this the best was to store it's value? Thanks, Spencer

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• Need sample program

  - by sharun

  Hi i generated private key(myrsaskey.pem) and kept the file in my local system. And i upload this file in google app application. Now i need a sample program which use Authsub, HMAC-SHA1,and this private key using Java. Please Help me. Regards Sharun.

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• Visual ++ print from main with inheritance on visual form in listbox

  - by captencrunch

  I´ve made a "main" class lets call it A(Veichle), and i have two classes that inherits from A Lets call them B(Car) and C(MC). i also have a handler lets call it "D" that binds A,B and C. Then i have the Form1 class lets call that E(Visual) I want to print out the private members from A on the visual form "E" in a Listbox If i try ex) this-listbox1-items-add(X.veichles[i]-getBrand()); it complains that veichles is a private member in D. How can i get around that?

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• functional test for rails controller privaet method

  - by mohit

  I have a private method in my controller. which is used for some database update. this method i am calling from another controller method. and it works fine. But when i am trying to write a test case for that method then It is tripping on accessing (session variable and params) in my functional all other methods are working fine the problem is only with private method? In my setup method in functional test, I am setting session also.?

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• is there a way to inject privileged methods after an object is constructed?

  - by patrickgamer

  I'm trying to write fully automated unit tests in JavaScript and I'm looking for a way to read some private variables in various JS functions. I thought I recalled a way to inject privileged members into a function/object (and found an overwhelming occurrence of "no such thing as private in JS") and yet I can't find any resources indicating how. I'm trying to read through the properties of .prototype but if there's a way, someone out here would know where to direct me faster than I'd find on my own. Thanks

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• Encrypted off-site data storage

  - by Dan

  My business has a rather unique problem. We work in China and we want to implement a file server paradigm which does not store any files locally, but rather in a server overseas. Applications would be saved onto our local machines, but data would be loaded directly into memory from the cloud, e.g. I load a docx into word at the beginning of the day, saving periodically to the cloud as I work on it, and turn off my computer at night, with nothing saved locally. Considering recent events, we worry about being raided by the Chinese authorities, and although all our data is encrypted, it would not be hard for the authorities to force us to give up the keys. So the goal is not to have anything compromising physically in China. We have about 20 computers, and we need an authenticated, encrypted connection with this overseas file server. A system with Active-Directory-like permissions would be best, so that only management can read or write to certain files, or workers can only access files that relate to their projects, and to which all access can be cut off should the need arise. The file server itself would also need to be encrypted. And for convenience, it would be nice if this system was integrated with each computer's file explorer (like skydrive or dropbox does, but, again, without saving a copy locally), rather than through a browser. I can't find any solution online. Does anyone know of a service that does this? Otherwise I'll have to do it myself (which kinda sounds fun, but I don't really have the time), and I'm not sure where to start. Amazon maybe. But the protocols that offices would use on their intranet typically aren't encrypted; we need all traffic securely tunneled out of the country. Each computer already has a VPN to a server in California, but I'm unsure whether it would be efficient to pipe file transfers through it. Let me know if anyone has any ideas. And this is my first post; feel free say whether this question is inappropriate/needs to be posted elsewhere.

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• CentOS with an Ubuntu kernel

  - by Gaia

  The Rackspace cloud server tech tells my CentOS 5.4 VPS (Xen) runs "CentOS with an Ubuntu kernel" Could someone explain, in plain terms, what "CentOS with an Ubuntu kernel" means and if there are any disadvantages (performance, mgmt) between that and running CentOS with a CentOS kernel? Thanks

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• mysql with DRBD on rackspace

  - by Richard Castle

  I am trying to set up a failover secondary MySQL server that is a mirror of my primary MySQL server using DRBD. The problem is that I am on a rackspace cloud server and I need a second partition on both the primary and secondary servers that I will replicate with DRBD. Rackspace does not allow me to create a second partition. I am left with the default single partition. How can I mirror using DRBD?

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• If you were starting today, what would you choose? [closed]

  - by WebDevDude

  If you were launching a new app today, with all the choices what would you choose? Cloud Hosting (Heroku, AppFog) VPS Hosting (just about anybody) Dedicated Servers (The Planet, RackSpace, etc.) I know this can be a very subjective question, but let's just go with the broad strokes here. Lets say you had an app, you don't know how it's going to do, but you want to be prepared for if it does take off, what would you go with?

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• Eucalyptus/ubuntu-server-11.04 - instance is running but can't access it

  - by itgorilla

  I've installed Ubuntu Enterprise Cloud on a server and I'm able to bring up an instance from a image and the instance shows that is running. I see the IPs allocated to that instance but for some reason I can't access it via SSH. euca-describe-groups shows: GROUP admin default default group PERMISSION admin default ALLOWS tcp 22 22 FROM CIDR 0.0.0.0/0 I'm on the same network as the instance so I'm sure is not an networking problem (like routers, switches etc.). Any ides?

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• How can I pre-sign puppet certificates?

  - by Ranguard

  Puppet requires certificates between the client (puppet) being managed and the server (puppetmaster). You can run manually on the client and then go onto the server to sign the certificate, but how do you automate this process for clusters / cloud machines?

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• Unable to connect to Linux (Virtual OS-vmware) through Putty on Windows

  - by RBA

  Hi, I want to access my Linux box (Virtual OS) through Putty on Windows using Run command: putty -ssh -P 22 192.168.171.130,,, but it is returning an error message, not able to connect. But few days back I was able to connect it today. But not now. Why?? Windows IP Configuration Host Name . . . . . . . . . . . . : rba7791fd466 Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Unknown IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No Ethernet adapter VMware Network Adapter VMnet1: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : VMware Virtual Ethernet Adapter for VMnet1 Physical Address. . . . . . . . . : 00-50-56-C0-00-01 Dhcp Enabled. . . . . . . . . . . : No IP Address. . . . . . . . . . . . : 192.168.234.1 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : Ethernet adapter Wireless Network Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Dell Wireless 1395 WLAN Mini-Card Physical Address. . . . . . . . . : 00-24-2B-60-A0-88 Dhcp Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IP Address. . . . . . . . . . . . : 10.0.0.2 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 10.0.0.1 DHCP Server . . . . . . . . . . . : 10.0.0.1 DNS Servers . . . . . . . . . . . : 10.0.0.1 Lease Obtained. . . . . . . . . . : Friday, August 28, 2009 4:11:09 AM Lease Expires . . . . . . . . . . : Saturday, August 29, 2009 4:11:09 AM Ubuntu Configuration eth0 inet addr:192.168.171.130

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• Serving a video and audio upload and streaming intense site

  - by Pollux Khafra

  I'm about to launch a new site that allows user to both upload/stream audio and video and I don't know anything about the server side of things. My original plan was to just use a dedicated server through Hostgator but from what I'm reading, Cloud hosting or Load balanced clustered is the best way to go for what Im trying to do. All the articles seem to have an agenda to sell you on an affiliate web host so how do I really need to do this?

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