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Bug 445072 - NBD swap on ltsp client not working
NBD swap on ltsp client not working
Status: CLOSED RAWHIDE
Product: Fedora
Classification: Fedora
Component: ltsp (Show other bugs)
9
i386 Linux
low Severity low
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Assigned To: Warren Togami
Fedora Extras Quality Assurance
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Depends On:
Blocks: K12LTSP
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Reported: 2008-05-03 03:52 EDT by Frantisek Hanzlik
Modified: 2008-08-04 15:17 EDT (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2008-08-04 15:17:28 EDT
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RHEL 7.3 requirements from Atomic Host:


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Description Frantisek Hanzlik 2008-05-03 03:52:46 EDT
Description of problem:
1)
/etc/xinetd.d/nbdswapd on server specify port 9572, but on client side
usr/share/ltsp/ltsp-init-common specify default port 9210. Thus, without
is port 9572 explicitly defined in lts.conf, NBD swap isn't working.

2)
I must add some small delay (sleep 0.5) to /usr/share/ltsp/ltsp-init-common
routine configure_swap after "modprobe nbd", else next command nbd-client
for some reason fail:

        NBD_PORT=${NBD_PORT:-"9572"}
        modprobe nbd
        sleep 0.5
        nbd-client $SWAP_SERVER $NBD_PORT /dev/nbd0 && ....

Tested on 800MHz PIII/256MB thin client, on slower HW it maybe run OK...

Version-Release number of selected component (if applicable):
ltsp-5.1.7-2.fc9

How reproducible:


Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:
Comment 1 Warren Togami 2008-05-04 21:20:47 EDT
Thanks for the report.  We will look into this.

https://www.redhat.com/mailman/listinfo/k12linux-devel-list
https://fedorahosted.org/k12linux/wiki/Meetings
You might be interested to follow our development mailing list and weekly
development meetings.
Comment 2 Warren Togami 2008-05-05 17:56:02 EDT
Here's an interesting problem:

[root@newcaprica cups]# telnet 172.31.100.254 9572
Trying 172.31.100.254...
Connected to 172.31.100.254.
Escape character is '^]'.
/usr/sbin/nbdswapd: line 23: /dev/stderr: No such device or address
Connection closed by foreign host.

Do you see this as well?
Comment 3 Frantisek Hanzlik 2008-05-05 18:11:34 EDT
oh, sorry, it I resolved by changes (/usr/sbin/nbdswap):

 if [ -n "$SWAPDIR" ]; then
     if [ -d "$SWAPDIR" ] && [ -w "$SWAPDIR" ]; then
-        TEMPFILE_OPTS="${SWAPDIR}XXXXXX"
+        TEMPFILE_OPTS="${SWAPDIR}/swpXXXXXX"
     else

and path to nbd-server is on Fedora diferent:

 # start the swap server
-/bin/nbd-server 0 $SWAP $NBD_SERVER_OPTS -C /dev/null > /dev/null 2>&1
+/usr/bin/nbd-server 0 $SWAP $NBD_SERVER_OPTS -C /dev/null > /dev/null 2>&1
 
 # clean up the swap file
 
Comment 4 Frantisek Hanzlik 2008-05-05 18:26:22 EDT
And if I remember, directory "/var/lib/ltsp/swapfiles" (defined by SWAPDIR
in /etc/ltsp/nbdswapd.conf) was owned by root:root, mode 755 (I'm not sure).
But xinet daemod start /usr/sbin/nbdswapd as user "nobody", thus

chown nobody:root /var/lib/ltsp/swapfiles
chmod 770 /var/lib/ltsp/swapfiles

Comment 5 Bug Zapper 2008-05-14 06:35:07 EDT
Changing version to '9' as part of upcoming Fedora 9 GA.
More information and reason for this action is here:
http://fedoraproject.org/wiki/BugZappers/HouseKeeping
Comment 6 Warren Togami 2008-05-16 13:02:27 EDT
https://code.launchpad.net/~ltsp-upstream/ltsp/ltsp-trunk
Please look over the changes I made upstream with are slightly different from
your changes.  This works for me.  Will be in the next version pushed to updates.
Comment 7 Warren Togami 2008-08-04 15:17:28 EDT
This was fixed in Fedora 9 updates a while ago.  You get 64MB NBD swap by default now.  Edit /etc/ltsp/nbdswapd.conf to change the amount.

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