IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 14 December 2021 (all times are UTC)
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| 10:19 | <danboid> alkisg, I just tried to install the ltsp server packages under 20.04 (server) and the installation has stalled on the line:
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| 10:20 | Hmm its done now :)
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| 10:20 | Lucky escape!
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| 10:20 | My expectations get warped by using u.2 SSDs in RAID 10 :)
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| 10:21 | FASTER! :D
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| 10:22 | <alkisg> 👍️
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| 10:25 | <danboid> alkisg, OK, so, before I run
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| 10:25 | ltsp dnsmasq
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| 10:27 | What would you recommend I do immediately after running that command to prevent this new LTSP server clashing with the existing LTSP server? Maybe disable one of the services?
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| 10:28 | I think to test it we'll be temp disabling the old LTSP server and handing over to th new one rather that creating MAC address lists on the DHCP server
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| 10:28 | If that makes sense
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| 10:29 | <alkisg> sudo ltsp dnsmasq -p0 -r0
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| 10:29 | This disables both proxy and real dhcp, so it's not interfering with anything
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| 10:29 | <danboid> Ah cool. So to reverse that I'd run
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| 10:30 | sudo ltsp dnsmasq -p1 -r1 ?
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| 10:31 | I'm sue its man page will tell me
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| 10:35 | <alkisg> Yeah
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| 10:36 | <danboid> OK seems I'd need to
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| 10:36 | run
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| 10:37 | ltsp dnsmasq -p $IPADDRESSOFDHCPSERVER
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| 10:37 | When I want to activate it
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| 10:37 | Obvs replacing $IPADDRESSOFDHCPSERVER with our DHCP servers address
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| 10:43 | <alkisg> I don't know what your current DHCP setup is
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| 10:43 | If you want ltsp in proxy mode, then it's just: ltsp dnsmasq
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| 10:49 | <danboid> alkisg, https://paste.ubuntu.com/p/hDVSRNYtqw/
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| 10:50 | <alkisg> danboid: is it a flat image with the first partition = ext4?
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| 10:50 | <danboid> alkisg, Also, what permissions should I use for the disk image files
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| 10:50 | <danboid> alkisg, I used VBoxManage to turn the vdi file into a RAW disk image
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| 10:50 | <alkisg> It doesn't sound like it succeeded
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| 10:50 | <danboid> I used the default install options in Ubuntu 20.04 desktop
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| 10:51 | <alkisg> It's usually easier to have the disk image files in the administrator account, e.g. even in ~/Virtualbox VMs/image-flat.vmdk, and just symlink them to /srv/ltsp/image.img
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| 10:53 | Then a plain `ltsp image` from anywhere works
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| 10:53 | <danboid> -rw------- 1 root root 53687091200 Dec 14 10:40 Ubuntu-20.04.raw
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| 10:53 | <alkisg> Don't you want to boot it with virtualbox again?
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| 10:53 | If it's owned by root, you'll have a hard time booting it
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| 10:53 | <danboid> I'm going to be updating it using qemu most likely
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| 10:54 | <alkisg> Still, why would you want to use root to update a vm
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| 10:54 | <danboid> Yes, what are the optimal permissions?
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| 10:54 | <alkisg> qemu runs as the user with no issues
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| 10:54 | Noone needs to read that file except you
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| 10:54 | sudo ltsp image will have enough permissions no matter what you put there
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| 10:55 | So you can be as restrictive as you like
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| 10:55 | <danboid> OK so I should've used a custom partition layout then, not the Ubuntu default?
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| 10:55 | <alkisg> What's the current partition layout? Put it to pastebin
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| 10:55 | sudo fdisk -l /path/to/raw
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| 10:55 | * -l /path/to/raw | nc termbin.com 9999
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| 10:56 | <danboid> Oh christ! Since when did vbox default to using UEFI?
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| 10:57 | I presumed it default to BIOS boot like virt-manager still does
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| 10:57 | <alkisg> ltsp can still mount the second partition of that image, but it'll need a ,partition= parameter in ltsp image to do so
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| 10:57 | See the ltsp image man page for that
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| 10:57 | It's generally easier to just rewrite the partition table
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| 10:58 | <danboid> rewrite the partition table?
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| 10:59 | <alkisg> Switch it from gpt/grub-uefi to mbr/grub-bios
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| 11:00 | <danboid> I've never done that. fdisk can do that?
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| 11:01 | <alkisg> Eeeh that'll need more time to explain than I currently have; do cp or reinstall or whatever it's easier for you :)
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| 11:04 | <danboid> I wonderred if you knew a single comand that could do that. I could do it manually but I'd rather just use te partition option for now. Lesson learned about vbox and ltsp image
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| 11:05 | <alkisg> More than one command is needed to convert a gpt disk to mbr
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| 11:06 | <danboid> Yeah, thats how I'd be doing it. In several stages
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| 11:08 | Maybe we could add a --uefi option to LTSP that would work with a default Ubuntu UEFI image?
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| 11:08 | to ltsp image
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| 11:08 | or it just autodetets
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| 11:10 | <alkisg> There's a ,partition option, see the man page...
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| 11:10 | Autodetection would be nice, sure, except that it's possible to put the kernel in a fat partition
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| 11:10 | So it might work for some cases, and break others, it'll need a lot of time+checks
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| 11:11 | <danboid> Whats the man page command for ltsp image?
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| 11:11 | That should be added to the install guide
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| 11:12 | and/or a link to the actual man page
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| 11:12 | <alkisg> man ltsp image
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| 11:12 | or man ltsp-image
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| 11:12 | Or https://ltsp.org/man/ltsp-image/
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| 11:13 | Both of them are already there in the installation guide
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| 11:14 | <danboid> Not quite
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| 11:14 | https://ltsp.org/docs/installation/
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| 11:14 | <alkisg> Sorry no time to chat more, back later
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| 11:14 | * alkisg will have little free time for the next few months... | |
| 11:14 | <danboid> says
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| 11:14 | see the ltsp image man page EXAMPLES section for how to include them
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| 11:14 | It should say
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| 11:15 | <alkisg> The LTSP supports three methods to maintain a client image. They are documented in the ltsp image man page.
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| 11:15 | (from that page)
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| 11:15 | Anyway, feel free to send a PR if you wish, the site code is on github
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| 11:15 | <danboid> see `man ltsp-image` ..
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| 11:15 | I will do yes
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| 11:15 | <alkisg> 👍️
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| 11:16 | <danboid> The other prob is that this is the only example I see in there for partitions and I don't understand it:
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| 11:16 | ltsp image /,,/boot,subdir=boot,,/opt,subdir=opt
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| 11:16 | Whuh?
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| 11:17 | Here's my default vbox Ubuntu install UEFI partition layout
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| 11:17 | https://paste.ubuntu.com/p/5xHqZP5fdd/
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| 11:18 | So what would be the woprking ltsp image command?
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| 11:20 | We'll get this added to the LTSP image man page / install guide as an example
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| 11:21 | seeing as this will be a very common use case
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| 11:26 | alkisg, There is no mention of a partition option in the current ltsp-image man page
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| 11:27 | I think I understand the format
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| 11:27 | <danboid> alkisg, Woukld it be
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| 11:28 | ltsp image /,/dev/sda5
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| 11:28 | or
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| 11:45 | Nope
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| 11:45 | I've looked at /usr/share/ltsp/server/image/35-image.sh and there is no support for alternate partition maps that I can see
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| 11:45 | So looks like I'll have to convert my image to a non-UEFI image
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| 11:50 | alkisg, So it needs to be a raw MBR disk image with only 1 ext4 partition?
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| 12:06 | I'm making notes on the steps I take to convert the image
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| 15:31 | <danboid> alkisg, Pfft! Took me most of the day to convert the image. Probably would've been faster for me to redo it :)
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| 15:31 | alkisg, I've documented it tho so will add that to the wiki
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| 15:32 | Could be useful to others until ltsp image supports EFI partitions
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| 15:32 | <alkisg> danboid: ltsp does support the partition= parameter that I mentioned, that can boot from gpt/uefi installations
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| 15:32 | I do not have enough time to help you locate the information though, sorry...
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| 15:33 | It's been also discussed in the github discussions
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| 15:33 | <danboid> alkisg, I looked at the image script and I couldn't see any such feature and its not covered in the man page
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| 15:34 | <alkisg> OK, I'll have a look in January when I'll have time to document this
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| 15:34 | <danboid> I didn't trawl the gh discussions. All important stuff such as this needs top be in the man pages or people won't find it
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| 15:35 | <alkisg> tsp/common/ltsp/55-images.sh: partition=
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| 15:35 | lltsp/common/ltsp/55-images.sh: partition=*) partition=$value ;;
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| 15:35 | <danboid> OK, I was looking at /usr/share/ltsp/server/image/35-image.sh
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| 15:35 | <alkisg> Currently, that's all I can offer wrt ltsp
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| 15:36 | In January, I'll have a bit more time to fix a few things and release the 22.01 version, for Ubuntu 22.04
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| 15:36 | I do not have time for more, even if they're needed or expected
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| 15:37 | If ltsp had another long-term developer, that codes and documents and answers github discussions etc etc, I'm sure it would be in a better place. Currently, it is what it is ... :)
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| 15:45 | (most of the image handling code is in common because it's also used when the client boots; i.e. ltsp can boot directly from the vm-flat.vmdk, without running ltsp image at all; very useful for quick testing or even for booting unmodified .isos)
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| 15:49 | It's even possible to reboot your server, and ask ltsp to boot the server itself using the .vmdk image that is located in the X partition. Very handy, but it's not something that should be documented for all users, it would just confuse them...
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| 15:50 | <danboid> It not safe to run
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| 15:50 | ltsp dnsmasq
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| 15:50 | Without configuring it first
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| 15:51 | My server hasn't been too happy since
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| 15:54 | The main interface is bond0 - 4x 1Gb ethernet connections bonded and then it hasd a separate 10gb nic
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| 15:55 | If a user has anyting a bit non-standard like this, should they not run `ltsp dnsmasq`?
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| 15:55 | <alkisg> I'd like to mention a last thing: these months I'm time-pressed. I don't want to be completely unresponsive though, I don't like that. I can spend a few minutes per day helping ltsp users, but no more. So is possible, I would like to respond to e.g. one question per user per day or something like that; no time for long chats now
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| 15:56 | I hope that's OK, but even if it's not, that's all I can do currently. And with that, /me waves, back to work for now...! :)
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| 15:56 | <danboid> That's understandable
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| 16:16 | <danboid> Hiopefully my network issues have ben fixed by running
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| 16:16 | sudo systemctl mask systemd-networkd-wait-online.service
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| 16:17 | Which I didn't think was still necessary but looks like it is
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| 16:37 | <danboid> If I wanted to chainload LTSP's ipxe from GRUB4DOS, what address would I use? Something like
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| 16:38 | http://myserver.com/ltsp/boot.ipxe
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| 16:38 | Hyperbyte, ?
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| 16:40 | Hmmm, seems I've trashed my server by installing LTSP server on it. I keep on getting disconnected from SSH and then I can't reconnect again until I use iDRAC to reboot it
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| 16:41 | <danboid> I'm going to have to look at what ltsp dnsmasq etc actually do
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| 16:41 | ie what assumptions they make about network devices
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