IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 22 May 2022 (all times are UTC)
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| 15:58 | <ABIXadamjurkiewi> alkisg: I know it is sunday, so please don't answer today...
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| 16:00 | I havae situation that on random stations in network sometimes does not map nfs mount exported on server. It is appears when client starts, so i guess can be some timeot
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| 16:00 | <ABIXadamjurkiewi> When I reboot such client, all nfs exports mounts ok
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| 16:01 | I am wondering, if there is some place in ltsp scripts when I could set some timeout for nfs mount...
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| 16:24 | <alkisg> ABIX adam.jurkiewicz: is that the rootfs or the home mount?
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| 16:25 | The rootfs is mounted by initramfs-tools, while home is mounted by fstab
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| 16:25 | LTSP isn't involved in either of them
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| 16:26 | <ABIXadamjurkiewi> it is oridinary exported in ltsp.conf
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| 16:26 | <ABIXadamjurkiewi> `FSTAB_UCZNIOWIE="server:/srv/uczniowie /srv/uczniowie nfs defaults,nolock 0 0"`
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| 16:27 | <alkisg> That's in fstab. It's mounted by the system, ltsp just adds the line there.
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| 16:28 | Check journalctl for possible errors
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| 16:29 | Also, do you have the nfs-common package installed?
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| 16:30 | <ABIXadamjurkiewi> nfs-common installed:
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| 16:30 | ```
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| 16:30 | root@sp3-mielec:~# dpkg -l | grep nfs
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| 16:30 | ii libnfs13:amd64 4.0.0-1 amd64 NFS client library (shared library)
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| 16:30 | ii libnfsidmap2:amd64 0.25-5.1ubuntu1 amd64 NFS idmapping library
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| 16:30 | ii nfs-common 1:1.3.4-2.5ubuntu3.4 amd64 NFS support files common to client and server
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| 16:30 | ii nfs-kernel-server 1:1.3.4-2.5ubuntu3.4 amd64 support for NFS kernel server
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| 16:30 | ```
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| 16:31 | I will check journalctl
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| 16:33 | <alkisg> (on the client)
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| 16:34 | Btw, are you creating the /srv/uczniowie directory from e.g. POST_INIT_MKDIR...?
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| 16:44 | <ABIXadamjurkiewi> no, just mkdir
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| 16:44 | I know journactl on the client, that is why I said : I will
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| 16:45 | On the client /srv/uczniowie is just being created by the scripts, nut by me
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| 16:52 | <alkisg> How do you run mkdir? The /srv is excluded from the generated image
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| 16:52 | Which scripts? Maybe these scripts run too late
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| 17:04 | <ABIXadamjurkiewi> Sorry, I thought you asking how I did the dir on server...
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| 17:04 | Of course, on client I do not do anything... all is doing automaticly onwhen client starts
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| 17:06 | I have changed ltsp.conf entry to:
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| 17:06 | `FSTAB_UCZNIOWIE="server:/srv/uczniowie /srv/uczniowie nfs timeo=1200,retrans=10,retry=5,nolock 0
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| 17:06 | 0"`
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| 17:06 | I will see what will happens... the server is located in school 400 km from me, so there is a teacher, and reports me...
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| 17:06 | I think I will have some report maybe in next 3 days
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| 17:07 | OK, now I must go back to my grandson
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| 17:07 | <alkisg> You need a mkdir then
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| 17:07 | On a POST_INIT_MKDIR directive
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| 17:07 | <ABIXadamjurkiewi> But in 95% I do not need to.. it is doing automaticly
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| 17:08 | Just in 5% of machines, random - sometimes...
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| 17:26 | <alkisg> Maybe the thing that does that automatically and we don't know what it is, fails 5% of the times due to race conditions. Try to mkdir.
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| 17:47 | <ABIXadamjurkiewi> I also think about race condition in NFS mount; exactly I think that way:
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| 17:47 | * in class there is 20 PC'a starting in one time
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| 17:47 | * all tries to mount FSTAB entries
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| 17:47 | * 5% fails with NFS mount sometimes... (I think it can be becuse of network traffic to server network card)
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| 17:57 | <alkisg> When it happens see if the dir exists or not, and check journalctl
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| 17:58 | I don't think an nfs mount would fail just because of increased network traffic
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| 18:03 | <ABIXadamjurkiewi> will check journalctl
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