IRC chat logs for #ltsp on irc.libera.chat (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
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| 10:46 | <tarzeau> so there's no way to have no cleartext password?
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| 10:46 | the point is i have one user (called kiosk) that needs to autologin
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| 10:46 | (for info displays and other things)
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| 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)
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| 10:47 | there's one option of using glusterfs for that user home, or i'd migrate the user to our ldap users
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| 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
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| 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 ?
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| 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 ?
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| 17:25 | Finally, if fstab is invoked after the user logs in, can I mention a user specific directory for the mount folder ?
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| 17:26 | Like something in /home/{username}/Documents/{NFS Share} ?
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| 17:31 | <vagrantc> julienfayad: FSTAB_* should be loaded at boot
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| 17:32 | <julienfayad> so no way to mount inside the /home/{username} directory
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| 17:32 | <vagrantc> julienfayad: so, the answer to your second question is "no, not any built-in feature of LTSP will do that"
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| 17:32 | <julienfayad> thanks vagrantc for the heads up
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| 17:32 | <vagrantc> you could write a hook for LDM to do that at login
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| 17:33 | <julienfayad> well that won’t cut it, since fstab would have been called already
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| 17:33 | so it would crash (because mountpoints need to be created before the mount command is called)
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| 17:33 | basically what comes to my mind now
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| 17:33 | is to do the following
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| 17:34 | <vagrantc> you could write a hook for LDM to do that at login
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| 17:34 | <julienfayad> you mean to invoke the mount command too ?
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| 17:34 | and then not using the fstab ?
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| 17:35 | <vagrantc> right
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| 17:35 | <julienfayad> well that would need much more work, as I’ll also need to pick the services to authorize on the clients
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| 17:35 | because adding the fstab in the lts.conf (with nfs mount type) automagically authorize nfs required services
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| 17:36 | refering to ltsp-client-core: /usr/share/ltsp/init-ltsp.d/50-rm-system-services
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| 17:36 | but what about doing it like that:
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| 17:36 | <vagrantc> init-ltsp.d is run very early in the boot process
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| 17:36 | <julienfayad> 1. Create the mount points in the ltsp server (I’m using pnp)
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| 17:37 | 2. add the mount instruction to these mount points in the fstab
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| 17:37 | 3. Invoke a LDM hook at login that would symlink these folders to the user Documents folder
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| 17:37 | would that work ?
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| 17:38 | <vagrantc> so, the filesystem is always mounted, and the user just has a symlink to their portion of it?
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| 17:38 | <julienfayad> well it will be mounted by fstab
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| 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
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| 17:39 | <vagrantc> but yes, presuming you did it right, that could work
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| 17:39 | although i don't see why you don't just have the LDM hook do the right thing.
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| 17:39 | if you've already got to write a hook that handles a symlink, you may as well do everything there
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| 17:40 | <julienfayad> because that would mean an extra step (at least that’s how I perceive it)
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| 17:40 | yet I might end up doing a mix of both
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| 17:40 | I have some folders that are to be mounted for all clients
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| 17:40 | and some others that are specific
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| 17:40 | so i might use an LDM hook for these very specific mounts
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| 17:40 | any place where these LDM hooks are documented ?
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| 17:41 | <vagrantc> i don't see why the ldm hook can't handle all of the steps
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| 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
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| 17:42 | <vagrantc> not really any documentation, no
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| 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
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| 17:42 | which I find a bit more clean
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| 17:42 | (I know that might sound scilly though… :-) )
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| 17:42 | <vagrantc> but you can look at all the other ldm hooks in /usr/share/ldm/rc.d ... if my memory serves
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| 17:42 | <julienfayad> ok great
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| 17:43 | thanks vagrantc
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| 17:43 | as usual you’re always here to help, that’s greatly appreciated
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| 17:43 | vagrantc++
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| 17:43 | <vagrantc> there are multiple phases
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| 17:43 | <julienfayad> not documented neither ?
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| 17:43 | <vagrantc> so you probably need to case your code to only run in the appropriate phases
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| 17:46 | julienfayad: read ldm-script, which has some comments about the various phases
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| 17:47 | <julienfayad> where is it located ?
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| 17:48 | <vagrantc> dpkg -S ldm-script
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| 17:48 | <julienfayad> Thanks!
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| 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
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| 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
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| 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
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