#arpnetworks 2015-03-06,Fri

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WhoWhatWhen
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RandalSchwartzahh, can't run xen on freebsd [10:19]
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mercutiorandal: you can't run the base vm on xen, but you can run subsequent ones. [12:57]
RandalSchwartzI guess I don't understand that yet.
xen isn't like virtualbox?
[13:00]
mercutiothe first dom0 is sepcial in that it by default provides the network/disk for vm's. [13:00]
brycecxen is not like virtualbox
xen is like vmware esx
[13:01]
mercutioapparently it can actually pass that stuff onto to other vm's.
brycec: it's not quite like either of them really.
well it's more like esxi.
[13:01]
brycecYeah, ther's a term for it, I can't seem to recall
something about layers
[13:01]
mercutioso you have a hypervisor that runs a series of virtual machines, but the first one gets "direct" access.
and it then has a memory window or such to pass data to other virtual machines for disk/network.
[13:01]
brycecAh here we go https://en.wikipedia.org/wiki/Hypervisor [13:02]
mercutioi wonder if i'm making it sound more complicated. [13:02]
BryceBotHypervisor :: A hypervisor or virtual machine monitor (VMM) is a piece of computer software, firmware or hardware that creates and runs virtual machines. A computer on which a hypervisor is running one or more virtual machines is defined as a host machine. Each virtual machine is called a guest machine. The hypervisor presents the guest operating systems with a virtual operating platform and manages the execution of the guest operating... [13:02]
brycecYeah, dom0 is technically a vm but it's treated special. It's similar, but not identical to the way esx works with having a base OS+Hypervisor [13:03]
mercutiobrycec: well esxi runs linux ..
you can actually get a linux shell
[13:03]
brycecbrycec knwos [13:03]
mercutioso it may actually be quite similar, i haven't really looked uunder the hood much
it has very limited drivers unlike linux
you can't even do software raid with esxi (grr)
[13:03]
brycecFor the sake of simplicity and explaining things to RandalSchwartz... [13:04]
mercutioso if you want a test server it's kind of annoying.
brycec: true.
ok yeah, it's like sxi :)
esxi
[13:04]
antbtw: vmware is currently getting sued for violating the gpl in esxi [13:05]
mercutioyou can actually host a virtual machine inside esxi that provides storage to esxi.
ant: makes sense.
[13:05]
brycecvirtualception [13:05]
mercutiopeople were doing solaris/opensolaris/etc with zfs inside a virtual machine, then doing nfs from that for the esxi data store. [13:06]
RandalSchwartzso I could run xen on my freebsd box, and use linux for the first vm, and freebsd for the other ones? [13:06]
mercutiousing vt-d to pass through a scsi controller generally, but i don't think that part is /necessary/ it just improves performance. [13:06]
brycecProbably. (I don't know much about FreeBSD Xen compatibility) [13:06]
mercutiorandal: yeah, but you'd do a linuux install, then a xen install, then rnu a freebsd vm. [13:06]
brycec(I guess so https://wiki.freebsd.org/FreeBSD/Xen) [13:07]
mercutiotbh i don't relaly think for most people xen is any better than kvm. [13:07]
brycecbrycec dislikes Xen
Much happier with KVM and the ilk, they don't require any guest customisations
[13:07]
mercutioit wsa better on older hardware as it had paravirtal vm's. but modern cpus have really accelerated extensions for normal vm's.
and now it's faster to have non paravirtualised.
[13:07]
brycecIf I can't run MSDOS as a virtual machine, what use is it? :P [13:07]
mercutiovmware took out it's paravirtal functionality.
i think in esxi 5
xen now has paravirtual, hvm, and a hybrid.
hvm is full virtualisation like kvm.
the only real advantage i find with xen is it makes it easy for me to host kernels outside the virtual environment and boot specific kernels.
[13:08]
grodyoh wow that was not worth it [13:09]
brycectwss [13:09]
BryceBotOkay! twss! 'oh wow that was not worth it' [13:09]
mercutiothere's also better support for video/pci device passthrough. [13:09]
grodyi actually went win 2k8 with hyperv 2012 and it makes xen super user friendly [13:10]
mercutiobut kvm is working to improve their stuuff, and it's mostly because xen forked qemu. but they're going back to non forked.
so if you want to do video passthrough on xen, at least before, it worked better to use the "legacy" qemu option.
[13:10]
grodyvideo passthrough on this lenovo in xen was fun [13:11]
mercutioby better i mean "it worked" rather than "it failed". [13:11]
brycecThe way I see it, at least in my workloads, there are two types of useful virtualisation: full machine a la KVM, or containerised a la OpenVZ. Everything else outside that scope is just more complicated than it's worth.
heh
[13:11]
mercutiobrycec: i actually like xen [13:11]
grodywindows hyperv is fast, but i am seriously disliking it
freebsd guests are still faster in xen tho
[13:12]
mercutiogrody: were you doing paravirtual or full virtual for xen in freebsd? [13:13]
grodyeven more so when you PV fbsd [13:13]
mercutioi've tried freebsd with xen and vmware
xen has this annoying problem with mtu's above 1.5k
[13:13]
grodyfirstly hvm then pv [13:13]
mercutiogrody: you should hvm.
it actually works better.
the pvhvm thing should be better still
[13:13]
grodynot hit that yet, doung pfsense with tagged vlans in xen and it seems fine [13:14]
mercutiobut yeah, there's a hvm kernel config.
grody: this was real larger mtu's
maybe vlan doesn't add enough
[13:14]
grodyah [13:14]
mercutiothere's a hard coded limit in some driver.
it's fixable
[13:14]
grodyyea im still legacy 10/100 here [13:15]
mercutioi still couldn't do over 2k
but slightly larger worked.
it always erks me when i seem to hit lots of "weird" problems, and other people don't.
[13:15]
grodyhaha and you google high and low only to find your question asked but never answered [13:16]
mercutiogrody: that's what i say haha
grody: and then ytou find out it's been happening for years.
i remember when i heard about the windows uptime bug
it crashed after 48 days of uptime or something with a wrap around.
i'd never hit that buug :/
(i did use that dirty windows for a bit)
[13:16]
grodyxen 4.1 says my mobo doesnt do iommu, but 4.5 is ok with it, couldnt find that one anywhere
i went evil buying a new tablet
i got the linx8 win8.1 .. now running arch
[13:17]
mercutiogrody: it's probably because new motherboard and old scipset.
also 5520 is blackedlisted.
[13:19]
grodygetting a vkeyboard up was fun, had to ssh most of it [13:20]
mercutioerr blacklisted.
and so vt-d is strictly possible, but things disable it
not that you're using that chipset
[13:20]
grodymercutio, no idea it is a pain of a lappy
lenovo s205
uefi is skiwiff too
[13:20]
mercutioi was doing vt-d on z77 for my gpu pass through
not all motherboards supported it.
oh amd
you like amd don't you grody :)
[13:21]
grodywel for a fraction of pruce to get eq.
its the pepsi of cpus
[13:22]
mercutioi have ex-lease laptop, it was old when i got it
and a chromebook
i am thinking of sticking that special boot thing on it
linuxbios?
err coreboot it seems now
it has the google one, but if it runs low on battery then it reverts to only booting chromeos.
and it's booting in legacy mode and you have to press ctrl-l as you boot
i kind of wish coreboot was used more by now. i kind of hoped it'd take off. it is interesting that google are using it though
uefi isn't really that wonderful.
[13:23]
BryceBotThat's what she said!! [13:25]
mercutioand it's huge and complicated.
really the boot loader should just be doing the init system, then providing resources to the initial os.
err hardware init
i'm ok with things like a little gui to overclock, and update bios from the gui etc.
but in the normal course of boot it should juust do the minimum, and not have a hugely massive api
http://www.uefi.org/sites/default/files/resources/2_4_Errata_B.pdf
[13:25]
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[13:33]
grodythat was fun [13:36]
mercutiowhat was? [13:42]
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brycecThis turned out to be pretty entertaining http://www.therestartpage.com/
(click things, move windows, fiddlw with stuff. It's interactive.)
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RandalSchwartzheh... that's cute
I'm booting openstep
Steve's Soul powers these machines. :)
[15:36]
grodyok i hate windows hyperv
im going back to debian xen
it lags like hell running freebsd guests
linux is fast as hell mind
[15:49]
mercutionetwork lag? [15:59]
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mercutiois anyone else seeing ping spikes to 4.2.2.2 but fine to 4.2.2.1. i assume 4.2.2.2 is probably getting ddos'ed or something, it's just curious and my usual "test ip" [23:38]
brycecI don't monitor it... But I'm not surprised
4.2.2.2 is the ip "everybody" knows and hits
4.2.2.1 is far less-known
[23:44]
acf_mercutio: 4.2.2.2 has always had terrible ping latencies for me
http://kremvax.acfsys.net/smokeping.cgi?target=Remote.l3dns
[23:44]
mercutioacf: it's been mostly fine for me before
i don't monitor to it i just check internet stuff with it at the time
wow it's really bad for you since like the end of june
but before that it was fine
is that on a vm?
[23:45]
acf_no, that's ARP Metal [23:47]
mercutiointeresting [23:47]
acf_yea, it's super strange [23:47]
mercutioi was just lookig athe localhost ping time
i suppose it's pretty stable, it jut seems high
mine sits around 10u on an i3-2100
[23:47]
acf_http://paste.unixcube.org/k/479429 [23:48]
mercutioyeah i'd already tried from arp native
well vm on arp
[23:48]
acf_yea, it's not going through anything strange afiact [23:48]
mercutiobut i did manage to test from one location that seemed better
it was better when it hit san jose 4.2.2.2 rather than los angeles 4.2.2.2
[23:48]
acf_ah right, that's anycast [23:49]
mercutioyeah, but los angeles seems worse than san jose
like way worse
[23:49]
acf_maybe I should start monitoring 4.2.2.1 [23:49]
mercutioi haven't got historic data, and you do :)
i wondered if it was some new ddos or something
i had weird slow gtt behave earlier today
then i saw someone reporting about gtt issues on outages
[23:49]
acf_is *that* what that was [23:50]
mercutiooh you noticed weird gtt shit?
it was pretty chronically bad.
[23:50]
acf_I didn't have much time to debug at the time
but something was clearly not right
[23:50]
mercutioi still don't know who gtt is compromised of properly.
but their network seems a badly managed hodge podge atm
i think it's gtt, tinet, nlayer, mzima, and someone else
[23:51]
acf_something like that
I guess gtt just bought everyone up
[23:52]
mercutiowhat [23:52]
acf_and didn't really try to integrate anything [23:52]
mercutiotry goign to www.gtt.net [23:52]
acf_umm [23:52]
mercutioit's not loading, and saying "checking your browser before accessing gtt.net" [23:52]
acf_yea [23:52]
mercutioand to allow up to 5 seconds
it's been way more than 5 seconds.
[23:52]
acf_appears to be some Cloudflare anti-ddos thing [23:53]
mercutioyeah
so gtt had massive ddos attacks today i imagine
i thought gtt were bigger than cloudflare
it's kind of scary when gtt are doing anti-ddos protection with cloudflare and their main web site doesn't even work
[23:53]
acf_I think cloudflare are super experts at anti-DDOS though [23:54]
mercutiowhat's that web host tracker thingy [23:54]
acf_for HTTP anyway [23:54]
mercutiothe one that usedd to say about apache vs iis [23:55]
acf_netcraft? [23:55]
mercutiothat's it
oh www.gtt.net loads now
[23:55]
acf_it did for me, after > 5 seconds :P [23:55]
mercutiohttp://toolbar.netcraft.com/site_report?url=http://www.gtt.net
so it looks like it was self hosted 5th feb 2015
[23:56]
acf_huh yea
just clicked refresh there
[23:57]
BryceBotThat's what she said!! [23:57]
acf_then the CloudFlare one showed up [23:57]
mercutioit only recently changed from windows to linux too
https://www.staminus.net/gtt-stops-offering-flowspec-what-this-means-to-ddos/
cloudflare use ntt
at least what i've noticed for communication to origin web sites
[23:57]

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