Dynamic Resource - Script on nfs share

Thomas Traunbauer_21869
Thomas Traunbauer_21869 Altair Community Member
edited October 2023 in Community Q&A

Hello,

i'm trying to create a dynamic resource.

When I place the script locally on the maschine (/tmp/script.py) it works fine. But when I place the script on a nfs-share (nfs/nas/pbs/config/script.py) I get a Security violation. Furthermore "nfs/nas/pbs/config/script.py file has a non-secure file access, setting resource token_dyn to 0, errno: 1

 

So its perfectly clear what happening, and why it does not work when the script is on the nfs-share. But I want it to be there, how can i make this file access secure?

 

thx

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Answers

  • Adarsh_20887
    Adarsh_20887
    Altair Employee
    edited October 2023

    Hi Thomas,

    It seems your query was answered via the  Service Now ticket by Anton.

    The requirements for the server dyn script are as below:

    1.   Please check PBS Professional 2022.1 Administrator’s Guide  on page AG-263

          There is a section specifically on this 5.14.3.1.i Requirements for Scripts that Update Dynamic Resources

    The script:
    • Owned and executable by PBS_DAEMON_SERVICE_USER
    • Has permissions of 0755
    • Returns its output via stdout, and the output must be in a single line ending with a newline
    • The scheduler has access to the script, and can run it
    • If you have set up peer scheduling, make sure that the script is available to any scheduler that needs to run it

    The directory containing the script:
    • Owned by PBS_DAEMON_SERVICE_USER
    • Accessible only by PBS_DAEMON_SERVICE_USER (must not give write permission to group or others)
    • Has permissions 0550

     

    2.    Please also make sure this script has a timeout or use the server_dyn_res_alarm attribute  so that it does not take too much time to run the query or commands .  https://linuxize.com/post/timeout-command-in-linux/

    Note: The scheduler runs the query and waits for it to finish or time out. The default timeout for a server dynamic resource script is 30 seconds. You can specify a timeout for server dynamic resources in each scheduler's server_dyn_res_alarm attribute. If the script does not finish before the timeout, the scheduler uses a value of zero for the dynamic server resource. If you set the timeout to zero, the scheduler does not place a time limit on the script.

    qmgr -c "set sched server_dyn_res_alarm = XX"   # xx is number of seconds, default is 30

     

    Thank you,

    Adarsh

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