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


Channel log from 22 July 2016   (all times are UTC)

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08:06
<tarzeau>
is lts.conf LDM_USERNAME=one and LDM_PASSWORD not there allowed and working, when using ssh with keys?
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10:00
<vsuojanen>
tarzeau: which ssh keys are you talking about? if I have up to date information ldm is not used if setting up client keys
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10:06
<vsuojanen>
on the other hand LDM_USERNAME and LDM_PASSWORD are commonly for autologin
10:46
<tarzeau>
so there's no way to have no cleartext password?
10:46
the point is i have one user (called kiosk) that needs to autologin
10:46
(for info displays and other things)
10:47
and i'd like to get rid of the local user (which i have to care about twice, since we have two ltsp servers)
10:47
there's one option of using glusterfs for that user home, or i'd migrate the user to our ldap users
10:47
but the cleartext password in lts.conf prevents the migration
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11:00
<vsuojanen>
if you are setting up autologin and use the upstream ltsp screen.d/kiosk (e.x. SCREEN_07=kiosk) why would you care about the password if it's used as info display (without any other things). normal trusted users are always on the servers
11:05
imo get read of the local user and use kiosk session. it cleanups automatically and creates a new session every time the kiosk session exits
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12:57
<boj__>
Can someone advise whether i can use LTSP for commercial purpose ?
13:12
<sebd>
boj__: what do you mean with "for commercial purpose" ? LTSP is free (as in "free speech"). It is free enough to be included in Debian.
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17:21
<julienfayad>
and also wondering, when is the fstab line of the lts.conf file invoked ? When the client boots up or when the user logs in ?
17:25
Finally, if fstab is invoked after the user logs in, can I mention a user specific directory for the mount folder ?
17:26
Like something in /home/{username}/Documents/{NFS Share} ?
17:31
<vagrantc>
julienfayad: FSTAB_* should be loaded at boot
17:32
<julienfayad>
so no way to mount inside the /home/{username} directory
17:32
<vagrantc>
julienfayad: so, the answer to your second question is "no, not any built-in feature of LTSP will do that"
17:32
<julienfayad>
thanks vagrantc for the heads up
17:32
<vagrantc>
you could write a hook for LDM to do that at login
17:33
<julienfayad>
well that won’t cut it, since fstab would have been called already
17:33
so it would crash (because mountpoints need to be created before the mount command is called)
17:33
basically what comes to my mind now
17:33
is to do the following
17:34
<vagrantc>
you could write a hook for LDM to do that at login
17:34
<julienfayad>
you mean to invoke the mount command too ?
17:34
and then not using the fstab ?
17:35
<vagrantc>
right
17:35
<julienfayad>
well that would need much more work, as I’ll also need to pick the services to authorize on the clients
17:35
because adding the fstab in the lts.conf (with nfs mount type) automagically authorize nfs required services
17:36
refering to ltsp-client-core: /usr/share/ltsp/init-ltsp.d/50-rm-system-services
17:36
but what about doing it like that:
17:36
<vagrantc>
init-ltsp.d is run very early in the boot process
17:36
<julienfayad>
1. Create the mount points in the ltsp server (I’m using pnp)
17:37
2. add the mount instruction to these mount points in the fstab
17:37
3. Invoke a LDM hook at login that would symlink these folders to the user Documents folder
17:37
would that work ?
17:38
<vagrantc>
so, the filesystem is always mounted, and the user just has a symlink to their portion of it?
17:38
<julienfayad>
well it will be mounted by fstab
17:38* vagrantc is not impressed by the nuance
17:38
<julienfayad>
which I could customize per machine according to what I understood from how lts.conf works
17:39
<vagrantc>
but yes, presuming you did it right, that could work
17:39
although i don't see why you don't just have the LDM hook do the right thing.
17:39
if you've already got to write a hook that handles a symlink, you may as well do everything there
17:40
<julienfayad>
because that would mean an extra step (at least that’s how I perceive it)
17:40
yet I might end up doing a mix of both
17:40
I have some folders that are to be mounted for all clients
17:40
and some others that are specific
17:40
so i might use an LDM hook for these very specific mounts
17:40
any place where these LDM hooks are documented ?
17:41
<vagrantc>
i don't see why the ldm hook can't handle all of the steps
17:41
<julienfayad>
it could, but an extra step would be to enable the NFS required services one by one in the lts.conf file
17:42
<vagrantc>
not really any documentation, no
17:42
<julienfayad>
where are they would automatically be included from the moment I add at least one nfs mount in the fstab of the lts.conf file
17:42
which I find a bit more clean
17:42
(I know that might sound scilly though… :-) )
17:42
<vagrantc>
but you can look at all the other ldm hooks in /usr/share/ldm/rc.d ... if my memory serves
17:42
<julienfayad>
ok great
17:43
thanks vagrantc
17:43
as usual you’re always here to help, that’s greatly appreciated
17:43
vagrantc++
17:43
<vagrantc>
there are multiple phases
17:43
<julienfayad>
not documented neither ?
17:43
<vagrantc>
so you probably need to case your code to only run in the appropriate phases
17:46
julienfayad: read ldm-script, which has some comments about the various phases
17:47
<julienfayad>
where is it located ?
17:48
<vagrantc>
dpkg -S ldm-script
17:48
<julienfayad>
Thanks!
18:13
<alkisg>
julienfayad: if you want to fool 50-rm-system-services to keep the nfs services, you can put FSTAB_KEEP_NFS_SERVICES="# nfs dummy entry" or something like that
18:14
Then with an LDM hook, as vagrantc says, you can run a mount command as root, right after the user authentication and before the user session is started
18:14
Btw, what will that mount command look like? Is it a per user, authenticated nfs mount?
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18:19
<maldridge>
I was doing something similar with fat clients, to the best of my understanding, the mount is done by the machine with a machine identity, but then a user's identity is used to actually do anything with the mount
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19:32* vagrantc doubts the user's identity will work, because LDM doesn't really roperly configure the user locally
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23:14
<julienfayad>
hi alkisg, the mount command would be something like mount -t nfs -o sec=krb5 server:/path /localpath