IRC chat logs for #ltsp on irc.freenode.net (webchat)


Channel log from 6 December 2013   (all times are UTC)

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02:08
<bennabiy>
vagrantc: what is the best storage method? Raw to LVM?
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05:51
<vagrantc>
bennabiy: hrm?
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13:21
<bennabiy>
vagrantc: What have you found to be the best storage method for your virt machines? Can you point me towards any good resources for info on how to effectively backup a vm without having to take it offline, or to migrate a machine from one location to another.
13:47
<gvy>
ltsp: location-transfer storage platform
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14:36
<markit>
bennabiy: I use proxmox http://pve.proxmox.com/wiki/Main_Page that supports "snapshot backup"
14:37
<bennabiy>
markit: Thank you. I will look into that.
14:39
markit: Debian based?
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14:41
<markit>
bennabiy: yes, but with red hat kernel
14:41
for better compatibility with hardware
14:42
if you are only interested in kvm virtualization and not openvz, you can install debian kernel, even from backports (i.e. kernel 3.11)
14:48
<bennabiy>
Interesting.
14:49
What benefit vs. overhead does openvz bring?
14:49
<markit>
bennabiy: openvz uses the host kernel, so small ram footprint, access of the host fs (but limited in scope) etc.
14:49
<bennabiy>
I currently have been using Xen on my non 64 bit machines and KVM / libvirt on my enabled
14:50
<markit>
kvm has improved so much that I don't use openvz anymore
14:50
i.e. can't do statefull iptable rules
14:50
or other problem with programs that require kernel modules
14:51
<bennabiy>
openvz is limited with that? So proxmox can be used without using openvz?
14:54
That sounds very interesting
14:57
markit: I appreciate the information. Thank you!
14:59
<markit>
bennabiy: you can create the kind of vm you want, kvm or openvz. If you don't use their kernel, you can create only kvm ones
14:59
RH kernel has the openvz patches
15:00
<bennabiy>
Ah, I understand now.
15:01
how does proxmox handle clustering and or migrating images from one server to another?
15:03
I cannot seem to get KVM to migrate my vm to another server.
15:05
I have one server which has a VM set up as a base install. I want to get that VM to 3 + servers, and then clone it about 3 times on each server, and then customize each one for the service it will provide.
15:09
<markit>
bennabiy: at the moment, live migration can be done only on shared storage
15:09
qemu is working on migration without shared storage, AFAIK
15:10
if you don't want live migration but just copy, do a backup on server one and a restore on server two
15:10
you have to change mac address etc then
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15:20
<bennabiy>
yes
15:30
great
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15:37
<bennabiy>
Does openvz support the live migration?
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16:01
<markit>
bennabiy: no, openvz supports far less features of this kind respect to kvm
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16:15
<bennabiy>
proxmox will migrate fine offline though, right?
16:15
to others in the cluster?
16:29
<markit>
yep, should be so (never setup a cluster myself)
16:30
you can connect to whatever node you want, see all the cluster in the web interface, and manage the vm from there
16:30
bennabiy: very handy
16:30
<bennabiy>
even over WAN?
16:31
I think I need to try it. do you install bare metal, or do you modify an existing install ( you personally )
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16:52
<markit>
bennabiy: bare metal, beware that balanks your hard disk
16:52
it's a 15min process
16:52
btw, a new version is coming soon, with qemu 1.7 and other nice features
16:52
like ceph support more integrated
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17:40
<bennabiy>
What do you use as storage format?
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17:54
<bennabiy>
markit: which kernel do you run? The 3.x or the openvz/ pve 2.6 kernel?
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18:43
<markit>
stock proxmox kernel
18:43
bennabiy: so 2.6, I've still a pair of openvz to keep running
18:43
and I prefer the "official" kernel from proxmox team
18:43
I've to run, see you later
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22:10
<kev_j>
anyone know why nbd-server would not be using it's auth file after an update?
22:11
the file is ltsp_i386 and it lists the auth file as /etc/ltsp/nbd-server.allow... and that is where the file is
22:12
I did a temp solution by commenting it out, but I am just confused why it seems to be ignoring the file
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22:14
<alkisg>
kev_j: https://bugs.launchpad.net/ubuntu/+source/nbd/+bug/1009393
22:15* alkisg wonders how it would be possible for nbd to use its allow file _before_ the update....
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22:19
<kev_j>
I ran an apt-get upgrade and it shit a brick afterwards... and it does say "authfile = /etc/ltsp/nbd-server.allow" in the ltsp_i386.conf file. That is why I am confused (or am I misunderstanding the bug report? which is entirely possible)
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22:20
<alkisg>
The bug report says that if you ever had an allow file, it would prevent nbd-server from working because it has a bug
22:20
There's no allow file by default
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22:20
<alkisg>
Which distro/version btw?
22:21
<kev_j>
oh, ok, sorry. I spent the last hour going back and forth on this issue
22:21
debian
22:21
<alkisg>
version?
22:22
<kev_j>
yeah, I just realized you said that.. wheezy 3.2.0-4-amd64
22:22
3.2.51-1
22:22
version 3.2-4~deb7u4 of nbd-server
22:22
<alkisg>
http://ftp-master.metadata.debian.org/changelogs//main/n/nbd/nbd_3.2-4~deb7u4_changelog
22:23
Cherry-pick df890c99337a255979e608d71f42401c0cddd5e0 from git HEAD to fix parsing of authfile files.
22:23
Cherry-pick df890c99337a255979e608d71f42401c0cddd5e0 from git HEAD to fix parsing of authfile files.
22:23
Thu, 28 Nov 2013 13:38:17 +0100
22:23
<kev_j>
thanks.. I will try checking changelogs next time I hit a wall
22:24
prolly a good idea anywho
22:24
<alkisg>
So if you now have a problem, mention it in the debian bug report
22:24
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=676678
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