ltsp doesn't recognise tftp lts.conf

[Stefan Breitegger]

Hi all,

If you see in the /opt/ltsp/i386/usr/share/ltsp/init-ltsp.d/05-getltsconffile:

# default to "/ltsp/i386/lts.conf".
if [ -n "$SERVER" ]; then
    fileonly=${filename##*/}
    pathonly=${filename%$fileonly}
    lts_conf_temp=$(mktemp)
    tftp "$SERVER" -c get ${pathonly:-/ltsp/i386/}lts.conf $lts_conf_temp >/dev/null
    # only overwrite lts.conf if it has non-zero size.
    if [ -s "$lts_conf_temp" ]; then
        mv "$lts_conf_temp" /etc/lts.conf
    else
        rm "$lts_conf_temp"
    fi
fi

# Get the lts.conf vars into the environment
. /usr/share/ltsp/ltsp_config
~

the leading / at "pathonly:-/ltsp/i386/}lts.conf $lts_conf_temp >/dev/null" confuses the netkit-tftp in ubuntu 12.04 amd64

I solved the tftp-problem by editing the /opt/ltsp/i386/usr/share/ltsp/init-ltsp.d/05-getltsconffile:

-- tftp "$SERVER" -c get ${pathonly:-/ltsp/i386/}lts.conf $lts_conf_temp >/dev/null
++ tftp "$SERVER" -c get ${pathonly:-ltsp/i386/}lts.conf $lts_conf_temp >/dev/null

Now the tftp-server I able to push the lts.conf to the clients.

Please fix.

Have fun!

[Alkis Georgopoulos (alkisg)]

Once the LTSP client boots, login, and run:
ltsp-localapps xterm
An xterm will open. Inside it, run:
tftp server -v -c get /ltsp/i386/lts.conf

If your TFTP server has a problem with that, and it wasn't a problem with the LTSP code or with your DHCP configuration (e.g. producing duplicate //ltsp/i386/lts.conf or something), then report the bug to your TFTP server, as other TFTP servers have problems _without_ the leading / (and those should be fixed too btw).

[Stefan Breitegger (tuxstef)]

Fine!!!

You shouldn't use netkit-tftp with ltsp

Now I've installed the tftpd-hpa and ltsp gets my lts.conf file perfect!

Maybe the wiki writers could notice this on the wiki pages.

Thanks a lot!

[Alkis Georgopoulos (alkisg)]

> as other TFTP servers have problems _without_ the leading / (and those should be fixed too btw).

Ah I think I misread your proposed fix, yours appears to be in that ^ case, not the opposite.

...try with "tftp server -v -c get ltsp/i386/lts.conf" too, both should work, report which one doesn't work in the netkit-tftp package.

[Stefan Breitegger (tuxstef)]

Hello,

tftpd-hpa: both versions work (ltsp/i386/lts.conf, /ltsp/i386/lts.conf)
tftpd (netkit-tftp): this one works: ltsp/i386/lts.conf

Have fun!

[Alkis Georgopoulos (alkisg)]

> You shouldn't use netkit-tftp with ltsp

Why don't you file a bug against netkit-tftp if it has problems with relative links? I'm sure that problem would affect other software too, not just LTSP.

> Now I've installed the tftpd-hpa and ltsp gets my lts.conf file perfect!
> Maybe the wiki writers could notice this on the wiki pages.

http://packages.ubuntu.com/precise/ltsp-server:
ltsp-server recommends tftpd-hpa or dnsmasq.

And the wiki proposes installing ltsp-server-standalone, which automatically pulls one of those 2 TFTP servers, or using the alternate CD, which does the same thing:
https://help.ubuntu.com/community/UbuntuLTSP/LTSPQuickInstall

[Alkis Georgopoulos (alkisg)]

> tftpd (netkit-tftp): this one works: ltsp/i386/lts.conf

Then just put that path in your DHCP configuration, the LTSP code then keeps the relative path that netkit-tftp needs:

$ filename=ltsp/i386/lts.conf
$ fileonly=${filename##*/}
$ pathonly=${filename%$fileonly}
$ echo ${pathonly:-/ltsp/i386/}lts.conf
ltsp/i386/lts.conf

I'm marking the bug invalid in LTSP and subscribing netkit-tftp instead, as the problem is there.

[Stefan Breitegger (tuxstef)]

Hello,

bug report is done:

https://bugs.launchpad.net/ubuntu/+source/netkit-tftp/+bug/1014524

Have fun!

[Alkis Georgopoulos (alkisg)]

> Then just put that path in your DHCP configuration

I meant, ltsp/i386/pxelinux.0. LTSP then tries to locate lts.conf in the same subdir, either absolute or relative, however it was specified in DHCP.

> tftpd (netkit-tftp): this one works: ltsp/i386/lts.conf

But since `tftp server -v -c get /ltsp/i386/lts.conf` doesn't work, then it's either a problem in netkit-tftp, or in your netkit-tftp configuration.