New answers tagged virtual-machines
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Each virtual machine is backed by its own vhd, which resides in a Page Blob in Azure Storage. This is not a good place to store any type of content that needs to be shared across multiple instances (and in-proc session state will also be limited to the running instance of that virtual machine). You need to store your session state and any other persisted ...
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Although we use XEN since 2007 I never did see an error like yours.
Your DomU-configuration looks good to me, so the error must be within the Hypervisor or the interaction with the Hypervisor of the Dom0 (xend or xenstore).
So some general advice:
For Problems with xenstore (typically: "hotplug-scripts not working"):
Do udevtrigger or udevadm trigger and ...
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I had the same problem while Sysinternals Process Explorer was running. Exiting Sysinternals Process Explorer fixed the problem.
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Just started working. I think these settings are OK, but there was something else going on that made it so my VM couldn't connect to the internet. After a few days (and several restarts) I checked again, everything was working.
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Yes, you can install specific versions of packages you want installed. The package resource has a special version attribute. You can read more about the package resource here: http://docs.opscode.com/resource_package.html
The code will look something like this:
package "httpd" do
version "2.2.22"
end
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I can't comment on procedures, while VLANs are not necessary for that sort of functionality, they can make things cleaner, and much simpler to administer. The only possible performance issue is the nearly negligible overhead it adds to packet size and processing. As it's a level 2 addition, it should not interfere with routing or protocols, unless you are ...
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I saw this error every time i shutdown my win7 virtual machine from QEMU/KVM.
And finally it was because of the arch parameter. I switch my xml configuration from arch=i686 to arch=x86_64. Then I could gracefully shutdown that virtual machine.
Hope this is helpful to you.
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Because you get delivery from one machine but not the other, I'd assume that the remote MTA is being reticent or lying outright on the 'recipient rejected' bit - qmail, for instance, does it all the time.
So possible causes would be:
One client is on a BL, the other is not.
One client not in the SPF record for the domain
Something fishy in the smtp chat ...
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Everytime I need to do this I fall back to HAProxy, this is another reverse proxy package that allows you to host multple services behind a single (or multiple) public IP's.
In this example i would install HAproxy on your machine with public address.
This can be done from APT-GET or YUM depending on your disto of choice. Once installed take a look at the ...
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You need a reverse proxy sat between the servers and the public network. nginx is a popular choice for this and there are many examples out there once you know what to search for (http://www.howtoforge.com/how-to-set-up-nginx-as-a-reverse-proxy-for-apache2-on-ubuntu-12.04 is one of the first that a search for "nginx reverse proxy" returned).
For ...
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The libvirt domain specification includes this functionality already. You can specify separate settings for incoming and outgoing traffic. The example given in the libvirt documentation is:
<devices>
<interface type='network'>
<source network='default'/>
<target dev='vnet0'/>
<bandwidth>
<inbound ...
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Distrowatch says...
Mint, Ubuntu, Debian, Fedora...
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You can certainly do this.
For access you can either use "bridge mode" networking to allow direct external access, NAT on the Linux side to redirect if you don't have spare public IP addresses, and for web content you can use Apache's mod_proxy to provide some isolation of the Windows VM.
I have done all three for a Windows VM running on VMware server, but ...
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I would suggest taking a look at http://blog.phusion.nl/2010/09/21/phusion-passenger-running-multiple-ruby-versions/
It uses Passenger standalone as reverse proxy to accomplish this.
There also seems to be some people accomplishing this using nginx and thin.
I wouldn't personally recommend VM's as RAM is usually the limiting factor, and most VPS's are ...
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Based on the above answers it seems:
Virtualising a server has introduced more complexity and risk in security and reliability, but these needs to be weighed against the benefits of being able to reduce downtime by virtualising a server.
If your environment requires audit, tests and documentation, the cost-benefit of added workload of a virtualised ...
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Converting to VM's has advantages you can't imagine especially when you start imaging the VHD's for safety and fast restoration.
There is a ton to consider and you won't have to innovate and learn the hard way as much as you would've just two years ago.
I hate listening to vendor guidelines for impartial advice for the obvious reasons, except for Mark ...
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Once you are "somewhat" able to boot your appliance on Xen, have you tried setting udev rules to rename hda to sda? Here is tutorial http://www.reactivated.net/writing_udev_rules.html on how to do that
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The following appears on Docker's Getting Started page:
Docker is still under heavy development. It should not yet be used in production. Check the repo for recent progress.
That speaks volumes.
Its only being available for Ubuntu is also a serious problem...
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Do not use the Hyper-V Export feature to export a virtual machine that is running a domain controller. Note found on Technet
This has been causing me some confusion, though not recommended we have used it before to transfer DCs to other virtual hosts.
Can someone clarify?
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If you need to run MySQL side-by-side with a Windows Service, this implies single-machine deployment on Windows Server. That gives you only a Virtual Machine option in Azure. Here's all of the latest info on Infrastructure Services which includes Virtual Machines. Your vhd would be backed by blob storage (durable, triple-replicated), as well as the data ...
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Why would you use a loop device in the first place? You would use LVM on a physical machine and there is no reason to do something else on a VM.
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The answer depends in large part on how you have configured Hyper-V to do the networking. When you set up a guest OS, you normally configure a virtual NIC (virtual network card), and the settings you selected there will have an impact on how your PC will handle network traffic. Typically, there are a few common options you can choose:
NAT
Bridged ...
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I had a problem with Disk Quotas.
In short I did the following:
disabled disk quotas
started VM
enabled quotas
Look for user account "NT Virtual MACHINE**GUID**", then select "Do not limit disk usage"
Seems I found a "non standard configuration" to have file shares with disk quotas on the same volume as the VM .vhd's. Pre-existing VMs and their user ...
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Run tcpdump on the host machine for a while and then analyze the captured packets. The IP that shows up most frequently is likely the target of the attack.
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This will depend on how your networking is setup on the host(s).
The easiest way would be to use bridged mode, this would allow the host to share the network adapter with the guest, giving the guest direct access to your LAN. Think of this as turning the host NIC into a switch, and having one cable going to the host, with others going to the guests.
With a ...
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CentOS version number basically matches the RHEL version numbering, so you will want to get a copy of CentOS 5.5 from their vault, as the current release in the 5.x line is 5.9.
I don't recall any special settings that are needed for a CentOS guest on VirtualBox, if only to get the thing running. A plain vanilla install should work. You will, of course, ...
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Yes, like TomTom said, OpenVZ CPUUnits are a relative measure. If you have 2 VMs and grant each of them equal CPUUnits (100, 1000, whatever) they will get an equal share of the host CPU. If you grant one double, triple, etc, it will get double or triple the priority of the CPU usage. There is a tool called vzcpucheck which will measure your CPU and ...
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May I ask what the hell for?
Check: http://kb.simplywebhosting.com/idx/6/067/article/
The "Unit" has no specific meaning but defines priority.
So, one 10, another 20 means the second gets - when CPU is the limit - twice as much power than the first.
Over 500k in granularity sounds - non,sensible.
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