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damian_19221's avatar
damian_19221
Icon for Nimbostratus rankNimbostratus
Mar 11, 2014

Configuration SMB Monitors

Hi, We are looking to load balance CIFS servers using the F5 - the idea is we have two servers, a primary and a secondary. I'd like to only use the secondary when the primary fails (using priority gr...
application delivery
availability
deployment
LTM
monitor
smb
  • F50_147262's avatar
    F50_147262
    Mar 13, 2014

    It seems as though the issue was due to a missing directory. The message below which was seen in the logs was due to the local directory not being present.

    file.txt was not transferred: No such file or directory

    The monitoring uses /var/run/monitors as a default directory. This appears to be hardcoded. The get commands are successful and the files are being placed in /var/run as indicated by the preceding lines in the logs.

    smbclient //longweb03sandbo/share mypassword -I 10.200.8.28 -p 445 -c cd .; cd; get file.txt file.txt.18261 -U myuser 
dirstring: Current directory is \
Domain=[LONGWEB03SANDBO] OS=[Unix] Server=[Samba 3.0.33-3.39.el5_8]
getting file \file.txt of size 2 as file.txt.18261 (0.5 kb/s) (average 0.5 kb/s)
Recvd: 'Current directory is \

    Creating /var/run/monitors directory resolved the issue. We now get:

    smbclient //longweb03sandbox/share mypassword -I 10.200.8.28 -p 445 -c cd .; cd; get damian.txt damian.txt.24691 -U 101135 
dirstring: Current directory is \
Domain=[LONGWEB03SANDBO] OS=[Unix] Server=[Samba 3.0.33-3.39.el5_8]
getting file \damian.txt of size 6 as damian.txt.24691 (1.5 kb/s) (average 1.5 kb/s)
Recvd: 'Current directory is \
'
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Cory_50405's avatar
Cory_50405
Icon for Noctilucent rankNoctilucent
Mar 11, 2014

I'll ask an obvious question. Have you checked the permissions on the CIFS server for the LTM to be able to access the file?

 

  • damian_19221's avatar
    damian_19221
    Icon for Nimbostratus rankNimbostratus
    Mar 11, 2014
    Good call... I hadn't tested that, but I just mounted the share from another host with the same credentials I'm using on the LTM and can read the file ok. I've not seen it documented anywhere, but what is supposed to go in the "Path / Filename" field in the monitor? If my file is in the top level directory of my share, then it should just be the file name?
  • Cory_50405's avatar
    Cory_50405
    Icon for Noctilucent rankNoctilucent
    Mar 11, 2014
    I believe so, because the location is relative to the service. If you are dropped into /share, then it should be right there. Have you tried capturing traffic on the LTM using tcpdump and saving to a file to view with Wireshark? I wonder if the capture would yield any useful information about the reason for failure.