IRC chat logs for #ltsp on irc.libera.chat (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.
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| 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"
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| 14:37 | <bennabiy> markit: Thank you. I will look into that.
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| 14:39 | markit: Debian based?
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| 14:41 | <markit> bennabiy: yes, but with red hat kernel
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| 14:41 | for better compatibility with hardware
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| 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)
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| 14:48 | <bennabiy> Interesting.
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| 14:49 | What benefit vs. overhead does openvz bring?
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| 14:49 | <markit> bennabiy: openvz uses the host kernel, so small ram footprint, access of the host fs (but limited in scope) etc.
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| 14:49 | <bennabiy> I currently have been using Xen on my non 64 bit machines and KVM / libvirt on my enabled
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| 14:50 | <markit> kvm has improved so much that I don't use openvz anymore
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| 14:50 | i.e. can't do statefull iptable rules
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| 14:50 | or other problem with programs that require kernel modules
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| 14:51 | <bennabiy> openvz is limited with that? So proxmox can be used without using openvz?
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| 14:54 | That sounds very interesting
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| 14:57 | markit: I appreciate the information. Thank you!
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| 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
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| 14:59 | RH kernel has the openvz patches
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| 15:00 | <bennabiy> Ah, I understand now.
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| 15:01 | how does proxmox handle clustering and or migrating images from one server to another?
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| 15:03 | I cannot seem to get KVM to migrate my vm to another server.
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| 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.
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| 15:09 | <markit> bennabiy: at the moment, live migration can be done only on shared storage
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| 15:09 | qemu is working on migration without shared storage, AFAIK
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| 15:10 | if you don't want live migration but just copy, do a backup on server one and a restore on server two
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| 15:10 | you have to change mac address etc then
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| 15:20 | <bennabiy> yes
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| 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?
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| 16:15 | to others in the cluster?
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| 16:29 | <markit> yep, should be so (never setup a cluster myself)
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| 16:30 | you can connect to whatever node you want, see all the cluster in the web interface, and manage the vm from there
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| 16:30 | bennabiy: very handy
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| 16:30 | <bennabiy> even over WAN?
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| 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
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| 16:52 | it's a 15min process
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| 16:52 | btw, a new version is coming soon, with qemu 1.7 and other nice features
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| 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
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| 18:43 | bennabiy: so 2.6, I've still a pair of openvz to keep running
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| 18:43 | and I prefer the "official" kernel from proxmox team
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| 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?
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| 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
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| 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
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| 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
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| 22:20 | There's no allow file by default
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| 22:20 | <alkisg> Which distro/version btw?
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| 22:21 | <kev_j> oh, ok, sorry. I spent the last hour going back and forth on this issue
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| 22:21 | debian
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| 22:21 | <alkisg> version?
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| 22:22 | <kev_j> yeah, I just realized you said that.. wheezy 3.2.0-4-amd64
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| 22:22 | 3.2.51-1
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| 22:22 | version 3.2-4~deb7u4 of nbd-server
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| 22:22 | <alkisg> http://ftp-master.metadata.debian.org/changelogs//main/n/nbd/nbd_3.2-4~deb7u4_changelog
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| 22:23 | Cherry-pick df890c99337a255979e608d71f42401c0cddd5e0 from git HEAD to fix parsing of authfile files.
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| 22:23 | Cherry-pick df890c99337a255979e608d71f42401c0cddd5e0 from git HEAD to fix parsing of authfile files.
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| 22:23 | Thu, 28 Nov 2013 13:38:17 +0100
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| 22:23 | <kev_j> thanks.. I will try checking changelogs next time I hit a wall
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| 22:24 | prolly a good idea anywho
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| 22:24 | <alkisg> So if you now have a problem, mention it in the debian bug report
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| 22:24 | http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=676678
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