IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 4 October 2020 (all times are UTC)
| 04:34 | <alkisg> Aison0: this means that your router does NOT send a gateway, and ipxe/dhclient are smart enough to figure it out, but initramfs/ipconfig aren't
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| 04:34 | Update your router to send a gateway
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| 04:35 | This *emulates* a dhcp request: /usr/lib/klibc/bin/ipconfig -n enp5s0
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| 04:35 | You can check the result from there
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| 09:11 | <Aison0> alkisg, this data sent to the client: https://pastebin.com/kE43fBSj
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| 09:12 | from the dhcp server
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| 09:18 | <alkisg> Aison0: and the output of the command that I said above? ^
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| 09:20 | It's more important to check the actual result that initramfs-tools parses, than the dhcp packet itself
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| 09:24 | I think I've seen initramfs-tools choking before, when encountering static routes in the dhcp packet, and the user had to manually put the gateway using a POST_INIT command
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| 09:43 | <Aison0> alkisg, yes, that's true. Therefore I set the gateway twice, once in static routes and once as router option
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| 09:48 | ipconfig -n shows
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| 09:48 | routes: 10.0.0.0/8 via 10.0.0.1, 0.0.0.0/0 via 10.0.0.1
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| 09:49 | else there are not informations about gateway
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| 10:04 | rootserver: 10.0.0.2 is correct
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| 10:04 | whats: filename: ltsp/unmatched-client
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| 12:39 | <alkisg> Aison0: this is good information, but unfortunately what we need to solve the problem is the output of the command that I asked for..
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| 12:39 | (07:35:24 AM) alkisg: This *emulates* a dhcp request: /usr/lib/klibc/bin/ipconfig -n enp5s0
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| 12:39 | This is not ifconfig. It's ipconfig, a different command in a different path. It's what initramfs is using.
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| 12:40 | So if initramfs can't handle your dhcp configuration, you either need to update your dhcp, or work around this initramfs bug with a POST_INIT ltsp.conf parameter
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| 15:03 | <Aison0> alkisg, i'm talking about /usr/lib/klibc/bin/ipconfig -n
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| 15:04 | <alkisg> Aison0: can you paste all its output?
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| 15:04 | usr/lib/klibc/bin/ipconfig -n enp2s0 | nc termbin.com 9999
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| 15:04 | https://termbin.com/pns9f
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| 15:04 | Something like that
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| 15:05 | If there's no gateway there, can you fix it from your dhcp server?
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| 15:06 | If you can't fix it from dhcp, then initramfs won't get a gateway, and you need a POST_INIT directive to work around it
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| 15:08 | <Aison0> alkisg, I wounder why it a problem of my initramfs, I guess it is just a configuration problem of the initramfs generator of ubuntu 20.04
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| 15:08 | <alkisg> Aison0: it's an bug in initramfs-tools since all debian and ubuntu versions
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| 15:09 | It's not smart, it supports "gateway" but not "routes"
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| 15:09 | <Aison0> the funny thing is, I also tried dracut
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| 15:09 | same problem there
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| 15:09 | <alkisg> The reason you weren't seeing it was because you were never using netbooting; dhclient doesn't have that issue
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| 15:09 | <Aison0> but maybe I forgot to enable some dracut modules for network boot
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| 15:09 | <alkisg> LTSP doesn't support dracut
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| 15:09 | <Aison0> ah, ok
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| 15:10 | <alkisg> (yet)
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| 15:10 | <Aison0> maybe it is possible to omit sending "routes" for the ltsp clients?
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| 15:10 | I can configure that on the dhcp server
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| 15:11 | <alkisg> Sure, or you can just put POST_INIT_ADD_ROUTE="ip add route..." in ltsp.conf
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| 15:11 | Whatever you prefer
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| 15:47 | <Aison0> hmm, dns lookup is also not working in debug shell
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| 15:47 | even after adding the default route
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| 16:06 | ok, dns was bad because systemd-resolved, I created now a static resolv.conf
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| 16:06 | now dns works in debug shell
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| 16:07 | why is CTRL+C not working ^^
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| 16:10 | http://termbin.com/wnm1d
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| 16:22 | <alkisg> Aison0: debug_shell isn't a shell. It's a loop of "eval"s
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| 16:22 | It help in viewing internal variables
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| 16:22 | You may run `bash` in there if you want ctrl+c to work
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| 16:24 | unmatched-client means that there was no match for the boot attempt; at that point it's not a boot attempt so it's ok
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| 16:24 | Now if you run ipconfig without the -n parameter, it will create a /run/net-*.conf file, with the parsed values inside it
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| 16:25 | With the output that I see in termbin, I guess IPV4_GATEWAY will be 0 in the generated conf file, so you'll need to provide a gateway or use POST_INIT=ip add route...
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