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  • Can Subject Alternative Name accommodate multiple virtual mail domains?

    - by Lawrence
    I am currently running a postfix server with self signed certificates serving one mail domain, mycompany.com, the mail server is mail.mycompany.com and so is the CN of the certificate. Now, I need to add a new domain to it. The new domain name is mycompany.net to the same server. Since the users already have the root of the old certificate, I'd like to reuse that. However, I'd like to issue a new certificate so users using the SMTP from Outlook/Thunderbird of mail.mycompany.net do not get warnings. If I understand correctly, if I issue a new certificate with CN=mail.mycompany.com and a subjectAltName=DNS:mail.mydomain.net and have postfix serve this, the client will not complain either way about the cn not matching the target host name. Am I correct in this assumption or am I misunderstanding the concept of Subject Alternative Name? Just to avoid conversation, I do not want to have users on mycompany.net addresses use the mycompany.com server because I might (not a technical issue) have to split up into two different locations, and I want to produce an easily migrateable setup.

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  • Why does dstat show zeroes for disk activity on my virtual private server running Ubuntu?

    - by Jonathan Berger
    I'm trying to monitor the number of disk reads and writes on my VPS (Rackspace in this case) running Ubuntu 9.04. I realize there are many tools to do this, but when using dstat 0.7 I tried the following command: dstat -d The output is just two columns of zeroes even when I upload a large file via scp that should be causing a large number of disk writes. Why is this, and how do I get dstat to correctly display the number of disk reads and writes?

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  • What steps should I take to debug this non-starting hvm virtual machine?

    - by Ophidian
    I have a dom0 machine running CentOS 5.4 with all the latest updates using Xen as my hypervisor. I am using Xen in part because this machine was set up prior to KVM being included in RHEL, and in part because KVM's network bridging configuration is not nearly as simple as Xen's. The dom0 machine is headless and I do all of my VM management via virsh from the command line. I have two hvm domU's: A web server running CentOS 5.4 A mail server running Gentoo Both VM's are backed by LV's on the dom0 but do not use LVM in the domU. Both have virtually identical libvirt configurations (differing by expected things like name, UUID, NIC MAC, VNC port, etc). The web server domU (WSdomU hereafter) does not start since applying the most recent kernel update (kernel-xen-2.6.18-164.15.1.el5.x86_64 and kernel-2.6.18-164.15.1.el5.x86_64 for the dom0 and WSdomU respectively). By 'not start' I mean it appears to be running but it does not use an CPU cycles, does not bring up a graphical console, and does not respond on the network. The WSdomU is listed as no state rather than the normal running or blocked in xentop. The mail server domU starts fine and functions normally. Here are the steps I have taken so far that did not solve the problem: Reboot the dom0 to see if things come up on their own Check xen dmesg on dom0 Check xend logs (a cursory viewing did not show anything blatant; specific suggestions of things to look for would be appreciated) Attempted to connect to the WSdomU's graphical (VNC) console from the dom0 Shutdown the mail server domU and attempt to start the WSdomU Check the SELinux labels on backing LV's (they're the same) Set SELinux to permissive and attempt to start the WSdomU Use virsh edit to try tweaking the WSdomU config virsh undefine, reboot, virsh define the WSdomU config dd the WSdomU LV to an .img file, copy it to my Fedora desktop and run it under KVM (works fine) What steps should I take next to debug this? I will edit in any additional configuration's requested in the comments.

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  • What is the best way/Software to manage multiple short lived instances of virtual machines ?

    - by Newtopian
    Hi, We have a QA department that have to test our software on multiple combination of OS and DMBS. With Windows spewing out many different versions the combinatorial math of all this can be daunting. So we decided on visualizing our setups but so far it only displaces the problem. The cost of hardware is expensive and we need many different combination far exceeding your server capacity to deliver. Also, these instances are throw away, once the test is complete we no longer need it, furthermore to ensure proper test isolation we should start fresh from a new instance. Lastly we only need a small subset of these system online at any given time. What I am looking for is a way to manage inventory so that our QA staff can order instances to be put online as required and discarded once used. Instances are spawned from a pool of freshly installed systems with the appropriate combination ready to accept our software. It also should be possible for two or more people to start the same instance at the same time, though we could manage without this if it proves too complex to put in place. Finally our budget is pretty thin, we can probably make some purchases but ideally expenditures should be kept to a minimum. To summarize we should be able to : Bring instances online on demand. Ideally should offer queue and scheduling management Destroy instances on demand Keep masters in inventory but not online. Manage large inventory of VMs (30-100 maybe more) with small staff of users (5-10). Allow adding, deleting and changing instances from inventory (bring online, make changes and check back in, or create new and check in). Allow few long lived instances for support tools (normal VM server usage) Thanks for your answers

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  • How can I copy a Virtual Machine on VMWare ESXi 4 while maintaining Thin Provisioning?

    - by Billy ONeal
    We have an ESXi host we use for testing, which results in a ton of VMs being created and copied on a regular basis. We don't have the storage capacity to use thick provisioned VMs on this server, and have been maintaining the copies using VMWare Converter. But using the converter is an incredibly slow operation which copies the entire contents of the VM over the network several times before actually finishing the copy. Is there a way to simply clone the VM but maintain the thin-provisioning?

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  • Is there a way to have a virtual directory in iis 7 point to another domain?

    - by Dan Appleyard
    Let us say I have two subdomains: http://content.mydomain.com and http://app.mydomain.com. http://content.mydomain.com is pointing at a different server than http://app.mydomain.com is. Is there a way to get a url of http://app.domain/content to point to http://content.mydomain.com without the url in the browser changing to the subdomain? I am trying to get this to work in IIS 7 / 6 and am having issues. Any advice would be greatly appreciated!

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  • How to install Mac OS X Snow Leopard server on any virtual machine with DMG?

    - by Eonil
    I'm trying to install Mac OS X Snow Leopard Server on VirtualBox. I know this is duplicated question, however another questions have no fine answer. I'm trying to install on VirtualBox on iMac. So this is pretty legal. But the problem is I want to install with DMG image. Because installing DVD drive is too slow, and I have to install Mac OS X many times. And taking DVD disc from box is annoying too. But VirtualBox fails installing. It couldn't load kernel. It installs well with DVDs. Is there any way to do this? I'm considering using other VM solutions like Parallels or VMWare if they can support install from DMG images well. If you know about them certainly, please let me know.

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  • FTP "PUT" fails from Virtual Machine, but not host PC: 504 Command not implemented for that paramete

    - by BrianH
    I have an FTP Script I'm using to automate a file transfer. The transfer works fine on my PC (XP SP2), but when I try and run it on a VM on my PC (XP SP2), the "put" commands gives off: 504 Command not implemented for that parameter. FTP File: open [ftp site] [username] [password] cd [directory on FTP server] binary hash put ..\[subfolder1]\[Subfolder2]\[subfolder3]\[filename] bye The FTP site/server is around the world, and not under my control. From what I understand of a 504, that means the command should NEVER work, but since the same script DOES work on my PC (hosting the VM), that eliminates syntax, file naming, etc. The put command when triggered from the VM, actually creates a 0 length file on the target FTP server, but doesn't populate the file.

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  • Is this common practice for disk quotas on virtual dedicated servers?

    - by Louis
    Hello, I was a bit surprised when I purchased a VPS with 15GB of storage to find that am left with very little space after Windows' 13GB footprint. I can't even install SQL Server. Tech support is saying this is normal. I know that if they felt like it they could remove Windows from the quota or adjust it accordingly. Is this a common practice or should I further pursue the issue with customer service?

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  • Virtual environment firewall with CSF + iptables rules on VM?

    - by luison
    We are getting into virtualization with a Proxmox VE (OpenVZ + KVM) server. Our plan for firewall is to have CSF (http://configserver.com/cp/csf.html) running on the host machine as we've had a reasonable good experience with it in the past. Apart from that we plan simple firewall rules on the VM machines (mostly OpenVZ containers with same kernel) and maybe fail2ban simple specific rules. I would appreciate comments with anyone with similar experiences? I understand all traffic comes via the host machine so a combined firewall there with specific firewalling on the VM should work, alltough some iptables rules are hard to get to work on OpenVZ containers.

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  • Windows 2003 SMTP virtual server, why emails are not delivered?

    - by bardan
    Configured Windows 2003 as my email client, everything works fine with POP3 (i'm able to recieve emails), the problem is with SMTP and i can't figure out how to find where excatly this problem is, because email looks like it is sent, but recipients don't recieve anything... i had some problems with relying, but fixed everything, and now i configured outlook express on the same machine, trying to send emails and it looks everything fine, email goes to SENT folder, no errors, but recipients (tried several diffrent) don't revieve any letters... tried to test from the same machine with telnet like it described there http://support.microsoft.com/kb/153119 ant everything looks ok...

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  • soft lockup - CPU#0 stuck for 11s! error with Xen virtual machines

    - by Arun
    Getting a kernel panic with this error on my XEN VPS's. (all on 8.04 LTS) The kernel version on my Dom-0 is 2.6.24-25-xen and the kernel version on the Xen VPS is also 2.6.24-25-xen. I read something about disabling APIC from here http://muffinresearch.co.uk/archives/2008/08/20/ubuntu-bug-soft-lockup-cpu0-stuck-for-11s/ but that doesn't seem to help as well. Anyone experienced this and are there any workarounds? Thanks in advance!

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  • How do I create a bridged virtual network for libvirt+KVM+ubuntu-server the easy way?

    - by Arthur Ulfeldt
    I see lots of documentation on how to manually set up a network bridge and then manually add vm's tun devices to these bridges and then write a shell script that glues it all together. lots of work, very manual, and not impressive. On the other hand if you want to use NAT to KVM+libvirt VMs to the network you just click the new network button in the virt-manager gui and relax. Am I missing "the easy way" of causing a VM to share the physical network with the host?

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  • Why is this setting for Name-based Virtual Host settings not working?

    - by Kave
    I have two domains (siteA.com & SiteB.com) that point to the same webserver and I would like to show different web pages for each. The steps I have taken so far are: Copy the default site (siteA) to siteB 1) sudo cp /etc/apache2/sites-available/default /etc/apache2/sites-available/siteB 2) sudo vim /etc/apache2/sites-available/siteB <VirtualHost *:80> ServerAdmin [email protected] DocumentRoot /var/www/siteB <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/siteB> Options Indexes FollowSymLinks MultiViews AllowOverride FileInfo Indexes Order allow,deny allow from all </Directory> </VirtualHost *:80> Then I created under /var/www/siteB and created a sample index.html in there. However when I load my domain siteB.com I still get directed to /var/www/siteA. Why is that? Do I have to rename the /etc/apache2/sites-available/default to /etc/apache2/sites-available/siteA as well? UPDATE: Thanks to the answer below it seems I had forgotten next to enabling the site also another entry: <VirtualHost *:80> ServerAdmin [email protected] ServerName siteB.com ServerAlias www.siteB.com </VirtualHost *:80> in order to include all subdomains as well then do: <VirtualHost *:80> ServerAdmin [email protected] ServerName siteB.com ServerAlias *.siteB.com </VirtualHost *:80> Same goes for siteA.

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  • How can I shut down all my Virtual Machines when my UPS kicks in?

    - by Tim
    I have a Dell T610 running ESXi4, an APC Smart UPS 1000VA and a local "console" machine running Vista and the vSphere 4 Essentials pack. A dedicated management network is in place between the T610 and the Vista machine. We have 4 VMs: SBS 2003, Server 2003 running Terminal Services, and two XP Machines. Ideally, when the UPS is forced to use battery power [for a set number minutes], I would like to gracefully shutdown all the VMs, then the ESXi, then the console machine. The latter two are not strictly a priority, but the VMs within ESXi are. Google provided lots of deprecated scripts that used to work on ESXi 3.x or similar, however I am unable to find what they were deprecated by. What do I need to be able to do this? I have Powerchute Express as supplied with the UPS, but would be willing to pay for software if required.

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  • Apache freezing, How to detect which virtual host is getting hit?

    - by mr-euro
    I have a production server that in the last 24 hours has been hard rebooted 4 times due to freezes. Ping is fine but all other services time-out (Apache, SSHd, etc). I have now diagnosed it to Apache running out of memory due to an exorbitant amount of child processes forking suddenly within seconds of starting Apache. Stopping Apache just after rebooting keeps the server stable again. My two questions are: Is there a way to detect which of the vhosts is being suddenly hammered without looking into each vhost's access log one by one? Is there a way to quickly enable/disable vhosts without commenting (#) them all out in httpd.conf?

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  • Can I create a virtual network interface to connect to a real network device?

    - by michelemarcon
    I have a networked windows pc with 2 network interfaces. The first connects to a lan with ip address 10.1.. The second connects to another lan with ip address 10.2.. Maybe it's a dumb question, however is it possible to virtualize the second network interface, so that the pc can connect to the 2 lans? If necessary, I may switch to linux or paravirtualization. CLARIFICATION: I want to send DHCP broadcast packets on the second lan, but not on the first lan. I want to do it with one single physical network interface. At the moment, I'm not using any virtualization software.

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  • Syntax error on running a batch file to replace files

    - by Ralph
    I have a batch file intended to replace all instances of tracking.js within a folder/sub folders. FOR /R "D:\Virtual Servers (Testing)\CourseWare Master\Shared\Jenison\Version1.2\" %%I IN (tracking.js*) DO COPY /Y "D:\Virtual Servers (Testing)\CourseWare Master\Shared\Jenison\tracking.js" %%~fI When this is run I get the following syntax error C:COPY /Y "D:\Virtual Servers (Testing)\CourseWare Master\Shared\Jenison\track ing.js" D:\Virtual Servers (Testing)\CourseWare Master\Shared\Jenison\Version1.2 \SHAPERS_COMBINED\Smarter Communications\WhatisInfluencing\script\Tracking.js The syntax of the command is incorrect. Ideas please?

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  • How is the 137GB limit counted in Virtual PC (two systems on one disk)?

    - by Nux
    I have a dual boot (Win7, XP) physical machine on my old computer which I want to virtualize and move to my new one. So I've uninstalled everything that I can and run shrink from RescueCD (used GParted). Now I have two about 80GiB partitions with a gap between them, so still this seem to be above the given limit. Still the resulting VHD (made with Disk2vhd) is much below the limit (about 110GiB) and both partitions are below the limit. So my question is - is it failing due to the limitations of disk size for VPC or is failing simply because it's a dual boot system. Or maybe it would work if I would move partitions to be close to each other (the gap between them is about 171GB and the whole physical disk is 1TB)?

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