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[#] Wed May 30 2012 23:12:30 EDT from ax25 @ Uncensored

Subject: Re: Fedora 17 released today

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Thanks!  Probably will get to it in the near future ...  Time is not on my side. (singing in my head).



[#] Thu May 31 2012 00:28:40 EDT from dowdle @ Uncensored

Subject: Type 1 vs Type 2

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Wed May 30 2012 10:44:52 AM EDT from IGnatius T Foobar @ Uncensored
I really think that with the advent of hardware-assisted virtualization, there is no practical difference in performance between "type 1" and "type 2" hypervisors.

I think there is a big difference between type 1 and type 2... mainly with the install.  As you surely already know, with the type 1 hypervisors you can just install them on the bare-metal.  With the type 2, you have to already have an OS installed and install the virt product just like an app.

I know, I know... you were saying that there isn't much difference with regards to performance.  I have no real data on that but I would love to see some... and believe that bare metal ones should come out on top... although yeah... by how many percentage points I'm not sure.  VMware USED to require a Linux install to manage it but they got rid of that with the ESX.  VMware is supposedly a standalone hypervisor OS with a management API/service running on top of it.  We use it at work but I don't have to work with it so perhaps I'm just ignorant.  Xen is very much like you described.  While in reality it is a thin hypervisor OS with its own device drivers... it does require Linux running in dom0 to manage the other domains.  I guess Xen (since 3.0 added fully virtualized VMs) is a lot like VMware.  I don't know much about HyperV but I'm guessing it is to Windows like KVM is to Linux.


TYL,
--
Scott Dowdle
Belgrade, Montana



[#] Thu May 31 2012 00:42:26 EDT from dowdle @ Uncensored

Subject: Give SPICE a try

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Wed May 30 2012 12:16:05 PM EDT from roue @ Dog Pound BBS II
I miss Xen's xm console, but with VNC it's not too bad. I know you can set up a serial console but I've never managed to get it working.


If you are doing desktop / GUI stuff in your Linux VMs or running Windows, you should give SPICE a try.  If the distro you are using doesn't offer SPICE support, you are using the wrong distro to run your KVM VMs on.  While SPICE is still under active development and their progress on client apps has been lagging, if you know where to look, it actually is pretty good... well... on a LAN.  WAN support is still on their radar but it has a way to go.

Need a SPICE client for Windows?  Look here:

http://elmarco.fedorapeople.org/     (See virt-viewer-0.5.3.exe and what it ads to the Start menu)

For Linux, spicy is pretty good.  spicec still works ok but they are moving away from the widget set that was written with and spicec is darn clunky.  If you want to use URLs on a webpage to load your client (and there are sample HTML pages to go by), install spice-xpi (currently Linux-only).

No Mac client yet.  There was one but I don't think it works anymore.

Mobile clients?  Not that I know of although supposedly there are a few user-built ones floating around.  I don't have a tablet nor smartphone so I haven't looked for them.

USB redirection was added fairly recently with an addon package but I haven't tried that yet.  I haven't really had a use for it yet.

Sound works fairly well and A/V sync is pretty good.  Microphones have worked fine for me but I haven't used them a whole lot.  Can't do any of that stuff in VNC.

The thing I like about KVM is that I can have my desktop VMs use DHCP and get private IPs but I can access them from a port on the host node.  I've connected to VMs on local host as well as remote ones.  Works great as long as you are suffering from a resource shortage on the client or the VM host.


TYL,
--
Scott Dowdle
Belgrade, Montana



[#] Thu May 31 2012 00:58:32 EDT from dowdle @ Uncensored

Subject: KVM for Windows VMS?

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Wed May 30 2012 03:37:22 PM EDT from athos-mn @ Uncensored
Unfortunately, I have to have the occasional Windows Server install on it, if just for testing, and KVM's didn't look all that great (mostly looking here: http://www.linux-kvm.org/page/Guest_Support_Status#Windows_Family).

I say give KVM a try with Windows VMs.  Looking at those reports most of them seem to be using Ubuntu Server 9.04 as their host node.  I wouldn't call that a modern system... so those are either dated reports or not really the prefered setup.  To me running KVM on Red Hat-based systems (RHEL, RHEL clone, or Fedora) seems to be the way to go because Red Hat (since they merged with Qumranet) really is in the drivers seat.  They are also the developers of all of the userland stuff (libvirt, virt-manager, SPICE, etc).  They are also reponsible for about 12-17% of every kernel release being the top company sponser since measurments started being done several years ago.

Red Hat is also pioneering cgroups to offer finer grained resource management of KVM VMs.  They have also been doing a lot of work with the virtio drivers, benchmarking, and fine-tuning.  Their engineers have given many presentations on how to tune KVM and when done properly, it seems to be winning the benchmarks... but you know what they say about benchmarks.

Now having said all of that, I'm NOT an advanced KVM user myself.  I don't get into the nuts and bolts of performance.  I only run a dozen or so VMs... with only a small handful of them being production stuff... and I'm not in a low resource environment where I'm trying to squeeze out as much performance as possible.  I just use virt-manager and mostly go with the defaults... and don't get into CPU flags nor pinning.  The tuning stuff still seems to be a black art but that is definitely changing as KVM matures.  Just remember that the first version of VMware came out in 1999... and that KVM is still rather young... although it has come a long way in a short amount of time by comparison.

TYL,
--
Scott Dowdle
Belgrade, Montana



[#] Thu May 31 2012 16:13:34 EDT from ax25 @ Uncensored

Subject: Re: KVM for Windows VMS?

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2008 R2 working fine on a few installs with me (KVM/Libvirt).  Mostly using as file / print servers, but had run 2010 Exchange on 2k8r2 as well.



[#] Thu May 31 2012 16:17:50 EDT from dowdle @ Uncensored

Subject: virt-viewer-0.5.3 for Windows officially released

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Just thought I'd mention that the developer has decided to let more people use it now and announced its availability:  virt-viewer-0.5.3 for Windows.

http://lists.freedesktop.org/archives/spice-devel/2012-May/009406.html

-- 
TYL,
--
Scott Dowdle
Belgrade, Montana



[#] Thu May 31 2012 16:37:29 EDT from ax25 @ Uncensored

Subject: Re: virt-viewer-0.5.3 for Windows officially released

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Just playing around with it and I guess I don't know what uri syntax it wants.



[#] Sat Jun 02 2012 10:48:45 EDT from dowdle @ Uncensored

Subject: Re: virt-viewer-0.5.3 for Windows officially released

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Thu May 31 2012 04:37:29 PM EDT from ax25 @ Uncensored

Just playing around with it and I guess I don't know what uri syntax it wants.




If you run the GUI it has a dialog box where you can put in the hostname and port.  If you are running it from the command line, it takes a URI like:

spice://hostname?port=xxxx

Let me know if that works for you or not.

-- 
TYL,
--
Scott Dowdle
Belgrade, Montana



[#] Mon Jun 04 2012 13:22:06 EDT from IGnatius T Foobar @ Uncensored

Subject: Re: virt-viewer-0.5.3 for Windows officially released

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spice://hostname?port=xxxx

...because it was important to throw away two decades of URI syntax convention and avoid spice://hostname:portnum at all costs. ^_^

[#] Sat Jun 02 2012 22:53:49 EDT from ax25 @ Uncensored

Subject: Re: virt-viewer-0.5.3 for Windows officially released

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Thanks Scott.  Will give that a shot later in the week.



[#] Mon Jun 04 2012 23:53:46 EDT from maraakate @ Uncensored

Subject: Re: How To: Download Kid's Educational Shows from YouTube in a free format

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No apt-get for debian :(

[#] Tue Jun 05 2012 08:41:21 EDT from dowdle @ Uncensored

Subject: Re: virt-viewer-0.5.3 for Windows officially released

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Mon Jun 04 2012 01:22:06 PM EDT from IGnatius T Foobar @ Uncensored Subject: Re: virt-viewer-0.5.3 for Windows officially released
spice://hostname?port=xxxx

...because it was important to throw away two decades of URI syntax convention and avoid spice://hostname:portnum at all costs. ^_^

My guess is that it can now or will in the future... accept additional parameters in the form of key=value pairs and they decided to go with one style for all of it rather than one style for the port value and a second style for everything else.  I haven't dug down deep into the protocol but I can imagine that under certain conditions it can take things like monitors=N, resolution=NxN, colordepth=N, etc.

TYL,
--
Scott Dowdle, Belgrade, Montana



[#] Tue Jun 05 2012 08:44:04 EDT from dowdle @ Uncensored

Subject: Re: How To: Download Kid's Educational Shows from YouTube in a free format

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Mon Jun 04 2012 11:53:46 PM EDT from maraakate @ Uncensored Subject: Re: How To: Download Kid's Educational Shows from YouTube in a free format
No apt-get for debian :(

Maybe they call it something other than youtube-dl.  Did you do a search?  I believe it is a python script so if you can't find it in your package manager, you can manually install it.  Debian is known for having a very deep package repository so I'm surprised to see Fedora have something that Debian doesn't.  I hate to manually install things myself.


TYL,
--
Scott Dowdle - Belgrade, Montana



[#] Wed Jun 06 2012 09:25:05 EDT from ax25 @ Uncensored

Subject: Re: How To: Download Kid's Educational Shows from YouTube in a free format

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youtube-dl is just a single python script.  You can get it here:

http://rg3.github.com/youtube-dl/download.html



[#] Wed Jun 06 2012 12:01:35 EDT from IGnatius T Foobar @ Uncensored

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(Reincarnating an old thread here)

Wed Aug 31 2011 04:40:05 PM EDT from LoanShark @ Uncensored

Sounds fishy. I think you may not get a time-consistent snapshot of the guest filesystems that you're backing up unless you perform xfs_freeze (or its equivalent under ext4 4, write_super_{un,}lockfs) in the *guest* 

After nearly a year, I am finding that my methodology of snapshotting the LV's and then rsyncing the snapshots to a backup location is still working flawlessly.  However I still need a better solution for my off site backups.

Where are we now with regard to btrfs?   Is it considered stable enough to run on a production system?

btrfs has the ability to do in-place snapshots.  I'd like to create snapshots and then rsync my application directories to an offsite server, rather than rsync the live data like I do now.



[#] Thu Jun 07 2012 14:33:46 EDT from dowdle @ Uncensored

Subject: Is btrfs ready yet?

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Wed Jun 06 2012 12:01:35 PM EDT from IGnatius T Foobar @ Uncensored
Where are we now with regard to btrfs?   Is it considered stable enough to run on a production system?


I don't have any personal knowledge / experience with it other than having played with it briefly about a year ago.  Here is the best article I have found on the subject if you haven't already read it:

http://www.h-online.com/open/news/item/Btrfs-ready-for-production-in-new-Oracle-Linux-kernel-1471706.html

From that I gather either Oracle's marketing has gotten ahead of its tech or they are happy enough with it to support it.  Perhaps they have added some extra special to their special sauce that is an Oracle-ized RHEL kernel.  SUSE has a track record of adopting a little early.  They did that with Xen... but perhaps others disagree.

In related news, Chris Mason (lead btrfs developer) is leaving Oracle to work for Fusion-IO (https://lwn.net/Articles/500738/)... but he will still be working on btrfs even after the move... and Oracle still plans on moving forward with btrfs in their flavor of Linux.


TYL,
--
Scott Dowdle - Belgrade, Montana



[#] Thu Jun 07 2012 18:33:19 EDT from dowdle @ Uncensored

Subject: My take on the Red Hat / Fedora Secure Boot controversy

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Greetings,

I've seen a few articles today railing against Red Hat for their support of Fedora buying a key from Microsoft / Verisign so that in the future, Fedora will be able to boot on hardware certified for Windows 8 without having to dig into the BIOS and turn off secure boot.

The issue isn't whether or not secure booting is the silver bullet for security issues... of course it isn't.

The issue isn't that the key thingies cost a fortune, they don't.  If I understand correctly, it's about $99 per Fedora release.  That's $198 a year.

The issue is that everyone is pissed because this involves Microsoft... and Red Hat is seen as somehow giving in to Microsoft.  Red Hat isn't giving in to Microsoft any more than they gave in to Akamai Technologies Inc when they bought the SSL certificate for www.redhat.com... or when they gave in to GeoTrust for the SSL cert for the fedoraproject.org website.  In each case case a work around is available but they are just trying to spare users and customers a little bit of hassle.  That's all.

-- 
TYL,
Scott Dowdle - Belgrade, Montana



[#] Thu Jun 07 2012 23:22:30 EDT from maraakate @ Uncensored

Subject: Re: How To: Download Kid's Educational Shows from YouTube in a free format

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I just had to save the script in my usr/bin/local and run youtube-dl and it works great. Thanks!

[#] Fri Jun 08 2012 09:32:27 EDT from IGnatius T Foobar @ Uncensored

Subject: Re: My take on the Red Hat / Fedora Secure Boot controversy

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I have to admit that allowing Microsoft to be the gatekeeper for this kind of thing gives me the screaming heebie jeebies. OEM's need to rally around a vendor-neutral consortium of some sort for this kind of thing.

[#] Tue Jun 12 2012 08:02:57 EDT from the_mgt @ Uncensored

Subject: Re: My take on the Red Hat / Fedora Secure Boot controversy

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I am getting mixed signals, but I heard it is going to VeriSign instead of MS:

And with Flame being around for years now, both of them are as trustworthy as a granddad carrying his credit cards pin along with him in his wallet...



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