I'm also in favor of epilog scripts, though it really depends on what you are eventually trying to achieve.
Also, I'm not sure I understand what you meant by the slurm job sleeping for 6 seconds and rebooting. You did want it to reboot, no? The 4 "missing" seconds might be the time difference between the spank and the job starting times. If you still require the spank plugin and it doesn't work, I can suggest trying to remove the '&' from the exec, and the wait() from the end, though I'm not sure it'll matter. You could monitor the node directly and see if the spank plugin script is inside a slurm controlled cgroup. In which case, you'd have to move it out of it. On Mon, Jun 4, 2018 at 6:37 PM, Brian Andrus <toomuc...@gmail.com> wrote: > Seems like there are better approaches. > > In this situation, I would use an epilogue script and give sudo access to > the script. Check out https://slurm.schedmd.com/prolog_epilog.html > > That would likely be much easier and fit into the methodology slurm uses. > > Brian Andrus > Firstspot, Inc. > > > On 6/4/2018 8:11 AM, Tueur Volvo wrote: > > I would like to run a bash script or binary executable as root (even if the > user who started the job doesn't have root rights) at the end of a job if I > put an option in my spank plugin > > 2018-06-04 16:36 GMT+02:00 John Hearns <hear...@googlemail.com>: >> >> That kinnddd.... of... defeats... the.... purpose.... of a job >> scheduler. >> I am very sure that you know why you need this and you have a good reason >> for doing it. Over to others on the list, sorry. >> >> On 4 June 2018 at 16:15, Tueur Volvo <huitr...@gmail.com> wrote: >>> >>> no I don't have dependency treated. >>> >>> during the job, I would like to run a program on the machine running the >>> job >>> but I'd like the program to keep running even after the job ends. >>> >>> 2018-06-04 15:30 GMT+02:00 John Hearns <hear...@googlemail.com>: >>>> >>>> Tueur what are you trying to achieve here? The example you give is >>>> touch /tmp/newfile.txt' >>>> I think you are trying to send a signal to another process. Could this >>>> be 'Hey - the job has finished and there is a new file for you to process' >>>> If that is so, there may be better ways to do this. If you have a >>>> post-processing step, then you can submit a job whihc depends on the main >>>> job. >>>> https://hpc.nih.gov/docs/job_dependencies.html >>>> >>>> On 4 June 2018 at 15:20, Tueur Volvo <huitr...@gmail.com> wrote: >>>>> >>>>> thanks for your answer, i try some solution but it's not work >>>>> >>>>> i try to add setsid and setpgrp for isolate my new process but slurm >>>>> job sleep 6secondes and reboot my machine (i test with reboot command, but >>>>> we can make other bash command, it's just example) >>>>> >>>>> pid_t cpid; //process id's and process groups >>>>> >>>>> cpid = fork(); >>>>> >>>>> if( cpid == 0 ){ >>>>> setsid(); >>>>> setpgrp(); >>>>> execl("/bin/sh", "sh", "-c", "sleep 10; reboot1&", NULL); >>>>> >>>>> } >>>>> wait(NULL); >>>>> >>>>> >>>>> maybe i have a error in my code ? >>>>> >>>>> 2018-05-31 9:37 GMT+02:00 Yair Yarom <ir...@cs.huji.ac.il>: >>>>>> >>>>>> Hi, >>>>>> >>>>>> I'm not sure how slurm/spank handles child processes but this might be >>>>>> intentional. So there might be some issues if this were to work. >>>>>> >>>>>> You can try instead of calling system(), to use fork() + exec(). If >>>>>> that still doesn't work, try calling setsid() before the exec(). I can >>>>>> think of situations where your process might still get killed, e.g. if >>>>>> slurm (or even systemd) kills all subprocesses of the "job", by >>>>>> looking at the cgroup. If that's the case, you'll need to move it to >>>>>> another cgroup in addition/instead of setsid(). >>>>>> >>>>>> Yair. >>>>>> >>>>>> >>>>>> >>>>>> On Wed, May 30, 2018 at 5:16 PM, Tueur Volvo <huitr...@gmail.com> >>>>>> wrote: >>>>>> > Hello i have question, how run in background bash script in spank >>>>>> > plugin ? >>>>>> > >>>>>> > in my spank plugin in function : slurm_spank_task_init_privileged >>>>>> > >>>>>> > i want to run this script : >>>>>> > >>>>>> > system("nohup bash -c 'sleep 10 ; touch /tmp/newfile.txt' &"); >>>>>> > >>>>>> > i want to run in independant process this bash script, i don't want >>>>>> > wait 10 >>>>>> > seconde in my slurm plugin >>>>>> > >>>>>> > i have this code : >>>>>> > int slurm_spank_task_init_privileged (spank_t sp, int ac, char **av) >>>>>> > { >>>>>> > >>>>>> > system("nohup bash -c 'sleep 10 ; touch /tmp/newfile.txt' &"); >>>>>> > >>>>>> > return 0; >>>>>> > >>>>>> > } >>>>>> > >>>>>> > actualy it's not work, when slurm ending to run my job, he kill my >>>>>> > nohup >>>>>> > command >>>>>> > >>>>>> > if i had in my c code sleep 12, my bash script work >>>>>> > >>>>>> > >>>>>> > int slurm_spank_task_init_privileged (spank_t sp, int ac, char **av) >>>>>> > { >>>>>> > >>>>>> > system("nohup bash -c 'sleep 10 ; touch /tmp/newfile.txt' &"); >>>>>> > >>>>>> > sleep(12); >>>>>> > >>>>>> > return 0; >>>>>> > >>>>>> > } >>>>>> > >>>>>> > but i don't want to wait, i want to run my bash script in >>>>>> > independant >>>>>> > process >>>>>> > >>>>>> > thanks for advance for your help >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> >>>>> >>>> >>> >> > >
