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...
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
16:01
I am wondering, if there is some place in ltsp scripts when I could set some timeout for nfs mount...
16:24
<alkisg>
ABIX adam.jurkiewicz: is that the rootfs or the home mount?
16:25
The rootfs is mounted by initramfs-tools, while home is mounted by fstab
16:25
LTSP isn't involved in either of them
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"`
16:27
<alkisg>
That's in fstab. It's mounted by the system, ltsp just adds the line there.
16:28
Check journalctl for possible errors
16:29
Also, do you have the nfs-common package installed?
16:30
<ABIXadamjurkiewi>
nfs-common installed:
16:30
```
16:30
root@sp3-mielec:~# dpkg -l | grep nfs
16:30
ii libnfs13:amd64 4.0.0-1 amd64 NFS client library (shared library)
16:30
ii libnfsidmap2:amd64 0.25-5.1ubuntu1 amd64 NFS idmapping library
16:30
ii nfs-common 1:1.3.4-2.5ubuntu3.4 amd64 NFS support files common to client and server
16:30
ii nfs-kernel-server 1:1.3.4-2.5ubuntu3.4 amd64 support for NFS kernel server
16:30
```
16:31
I will check journalctl
16:33
<alkisg>
(on the client)
16:34
Btw, are you creating the /srv/uczniowie directory from e.g. POST_INIT_MKDIR...?
16:44
<ABIXadamjurkiewi>
no, just mkdir
16:44
I know journactl on the client, that is why I said : I will
16:45
On the client /srv/uczniowie is just being created by the scripts, nut by me
16:52
<alkisg>
How do you run mkdir? The /srv is excluded from the generated image
16:52
Which scripts? Maybe these scripts run too late
17:04
<ABIXadamjurkiewi>
Sorry, I thought you asking how I did the dir on server...
17:04
Of course, on client I do not do anything... all is doing automaticly onwhen client starts
17:06
I have changed ltsp.conf entry to:
17:06
`FSTAB_UCZNIOWIE="server:/srv/uczniowie /srv/uczniowie nfs timeo=1200,retrans=10,retry=5,nolock 0
17:06
0"`
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...
17:06
I think I will have some report maybe in next 3 days
17:07
OK, now I must go back to my grandson
17:07
<alkisg>
You need a mkdir then
17:07
On a POST_INIT_MKDIR directive
17:07
<ABIXadamjurkiewi>
But in 95% I do not need to.. it is doing automaticly
17:08
Just in 5% of machines, random - sometimes...
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.
17:47
<ABIXadamjurkiewi>
I also think about race condition in NFS mount; exactly I think that way:
17:47
* in class there is 20 PC'a starting in one time
17:47
* all tries to mount FSTAB entries
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
17:58
I don't think an nfs mount would fail just because of increased network traffic
18:03
<ABIXadamjurkiewi>
will check journalctl
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