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[#] Sun Apr 01 2012 13:02:10 EDT from IGnatius T Foobar @ Uncensored

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ProxMox VE is the fastest way to turn a computer into a good quality virtualization host with all of the trimmings. On one CD you get the base operating system, all the tools, and a decent user interface. It also has a built in cluster manager so you can add more hardware later if you find that your workload exceeds one server.

Uncensored and all citadel.org properties are running on a PVE host. I also have a six node cluster hooked up to shared storage over at the Big Blue X which we operate as a multitenant cloud.

On merit alone, PVE wins hands down. However I also like to look at where the community is going, and if it seems that there will be rallying around one particular piece of software or framework then that's worth something too; I don't want to have to manage a conversion job later on. That's why I originall went with KVM even though Xen was king at the time, and that worked out well. Right now, PVE is the best but it doesn't have widespread energy behind it. It's looking like oVirt may eventually grab that spot.

oVirt has Red Hat, IBM, and Cisco (among others) behind it. They spend a lot of time talking about "open governance" which seems to be a direct shot at the way Rackspace dictates the direction of the OpenStack project. Their message seems to be that oVirt will be the clear vendor-neutral answer to VMware vSphere.

I haven't tried oVirt yet but I plan to do a pilot project this year. From what I can tell it's not as drop-dead easy to install as PVE but it may scale better.

[#] Wed Apr 04 2012 19:20:19 EDT from the_mgt @ Uncensored

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@spell binder

KVM with virt-manager is what I prefer for remote stuff, virtualbox is nice on my desktop, since it does sound and clipboard and other nice stuff.

virt-manager lets you use more than only KVM (vbox,  xen, etc) and in combination with SASL blends into an AD environment. That is not entirely documented well, but it works fine here. You automagically can SSO into the VNC of your vm, too. But releases might be buggy, as loanshark pointed out. And their error messages are quite on the kabbalistic side at times.



[#] Thu Apr 05 2012 18:22:45 EDT from ax25 @ Uncensored

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Seconded on the KVM / Libvirt combo here.  I prefer virsh for all my stop / start / force reboot that damn windows server needs.  Virsh provides a nice terse interface via ssh (just the way I like it)....

Ax25



[#] Sun Apr 08 2012 08:53:06 EDT from IGnatius T Foobar @ Uncensored

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It should be noted that most KVM based virtualization solutions are currently in the process of migrating from VNC to SPICE protocol for the remote console.
The benefits here will include a more high performance display (better rendering of media, accelerated graphics, etc) as well as remote audio, and I believe they've also got something in there for client-side storage and usb etc. [http://spice-space.org/]

[#] Wed Apr 11 2012 17:56:28 EDT from kinetix @ Uncensored

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That's good info to know. I've been running vmware and then more recently Virtualbox as local workstation installs, and was recently beginning looking in to KVM. I'd got pieces installed but haven't had the time to turn up a VM yet.

[#] Thu Apr 12 2012 16:41:06 EDT from the_mgt @ Uncensored

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Still my vserver provider moved me from openvz to xen. I hear lots of people prefering xen for things which needs to be closer to the hardware. And some other arguments which sounded worth considering. But since I already forgot them...

Anyway, my personal feeling is that xen is dead. 



[#] Fri Apr 13 2012 07:33:42 EDT from IGnatius T Foobar @ Uncensored

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Xen is a true bare-metal hypervisor that actually sits underneath the kernel of the Linux operating system used to manage its resources (dom0). It is analagous to VMware ESX in that regard.

What the Linux world is finding, however, is that with hardware-supported virtualization, bare-metal hypervisors don't offer any additional performance benefits anymore. That's why Linus chose KVM instead of Xen as the official hypervisor for the mainline kernel. KVM requires hardware VT, of course.
The benefit of making that decision is that all of the other supporting pieces -- memory management, disk queues etc -- not to mention device drivers -- are all provided by the existing Linux kernel; virtual machines are treated as "just another process" by the host OS, but at the same time the performance hit of running inside a virtual machine is negligible.

So is Xen dead? As a commodity hypervisor, I think so. It will live on in specific places where it's highly customized.
Amazon EC2 is probably the best example; they've tuned the hell out of it and brought in some highly tweaked guest kernels so that they can fit a lot more guests on the same amount of hardware. That's the kind of place where Xen will continue to run. For the average IT/datacenter wonk doing server consolidation, it's all about KVM (and VMware) at this point.

By the way, ProxMox VE 2.0 finally came out of beta and was released last week. I haven't tried it yet but the screenshots look fabulous.

[#] Sun Apr 15 2012 14:20:39 EDT from the_mgt @ Uncensored

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The way you put it, IG, it totally makes sense.

 

I got a question now myself:

I need to run two VMs (Linux Server (probably ClearOS) and definetly WinXP) on a server. Since it is mainly Windowsland out there, I need a way to manage (restart, etc) them via a webinterface or vnc/rdp. Also, there should be a desktopish non-network way to manage them directly at the host. There will be mouse/keyboard and tft attached.

The site were it runs is a commercial fascilty and they are the worst misers in the world, so should be totally FOSS. Any recommendations for the underlying OS (should be flavour of linux/bsd) and the virtualisation software?

(Is there a windows tool for libvirtd around yet?!) 



[#] Sun Apr 15 2012 19:47:28 EDT from IGnatius T Foobar @ Uncensored

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And right now I'd be happy to deal with either Xen *or* KVM as I troubleshoot a virtualization problem tonight (yes it's 7:45 on a Sunday evening here in Uncensoredland) ... VMware's diagnostics are famously useless. Their error messages basically say "something probably went wrong somewhere in there ... good luck poring through the megabytes of equally useless log files I'm generating"

[#] Sun Apr 29 2012 14:26:10 EDT from maraakate @ Uncensored

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Caught up on all the messages I've missed (haven't logged in for a while).
Glad to see this is one of the few places I can actually see some true linux discussion and not some rampant fanboyism over Ubuntu and other garbage.

[#] Sun Apr 29 2012 15:09:03 EDT from the8088er @ Uncensored

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Is UNIX discussion welcome in the Linux room?

[#] Sun Apr 29 2012 22:19:02 EDT from IGnatius T Foobar @ Uncensored

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Dunno why you'd want to, when we have a separate UNIX room.

Fanboyism has its place but most of that type of thing came and went here years ago. Eventually you get to a point where you just want stuff to work.
Thankfully most Linux environments give you that nowadays. Manually configuring refresh rates in X11 and compiling features into your kernel are so 20th century.

[#] Mon Apr 30 2012 21:55:14 EDT from maraakate @ Uncensored

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Yeah, I'm quite surprised at how easy linux finally became. I just installed Debian onto the laptop I'm typing from now by downloading the mini iso and running setup.exe from inside vista. I was able to reformat the drive and everything, can't believe it even worked!

[#] Mon Apr 30 2012 00:48:38 EDT from Freakdog @ Dog Pound BBS II

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I think there's still a Unix room, but I can't see why not...we've survived topic drift for several decades, already. ;-)

[#] Thu May 03 2012 01:18:20 EDT from maraakate @ Uncensored

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I've been playing around more with Linux lately. I have debian setup and had to do a few apt-get install's for some essentials (i.e. g++, make, cvs, etc.). The one gripe I really had with it was the wlan configuration. For some reason, my card does work and it does show up but the GUI interface doesn't seem to recognize it.

So, I had to go online and found some awkward tutorial on how to configure it. That wasn't so bad, but the awful part was trying to get it to work with WEP/WPA/etc. For some reason I could just never get it to work properly so I got so frustrated with it that I configured the router to have no passwords and be locked by MAC Address.

I don't understand why the wlan0 would show up in iwconfig totally fine, but not in gnomes configuration utility and why would linux make it overly difficult to setup WEP/WPA from the command line?

[#] Fri May 04 2012 08:18:50 EDT from the_mgt @ Uncensored

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 First rule of WIFI under Linux: If it doesnt work out of the box, replace your WIFI card.

Second rule: Feck all the desktop specific gizmos and gadgets.

I use plain old wpa_supplicant, that is what is run under the hood probably by all other managers too.

And it actually has a gui and a tui: wpa_gui and wpa_cli. 



[#] Fri May 04 2012 09:50:19 EDT from dothebart @ Uncensored

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my last fiddlings all have been about the RFKill and friends...

is the device up, is the radio enabled, is the whole card disabled by rfkill, sometimes rfkill even switches bluetooth & wifi with the same pushbutton cycling through them.

and... for shure... are the binary firmware packages installed.



[#] Fri May 04 2012 23:22:40 EDT from the8088er @ Uncensored

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Oh, didn't know there was a UNIX room. Heh. Thanks.

[#] Sun May 06 2012 22:12:17 EDT from Sig @ Uncensored

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I'm doing 3 months of updates to my Linux Mint Debian Edition netbook using the free hotel wirekless. I've been delaying because we keep getting charged for going over our bandwidth at home.
OK, that was more interesting in my head. Carry on.

[#] Wed May 09 2012 15:26:29 EDT from maraakate @ Uncensored

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lol

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