Re: [HTCondor-users] delaying job starts on execute node boot up

[Michael Thomas <wart@xxxxxxxxxxx>]

On 11/5/25 10:00, Greg Thain via HTCondor-users wrote:
> On 11/5/25 07:57, Andrew Pickford wrote:
> > Hi All,
> >
> > I'd like some advise on the best way to automatically stop an execute 
> > node from running jobs for say 5 minutes after the machine has booted up. 
>
>
> HTCondor doesn't advertise the system boot time by default. However, 
> with STARTD_CRON, it is straightforward to add the system boot time to 
> the slot ad. If you are on linux, the startd cron script can grep the 
> btime out of /proc/stat, and advertise that. A script that looks 
> something like this:
>
> #!/bin/sh
>
> awk '/^btime/ { print "BootTime =", $2} END {print "- update:true"}' < / 
> proc/stat
>
>
> will generate the proper classad snippet, and setting up the startd cron 
> in the startd config would look like this:
>
> STARTD_CRON_JOBLIST = BOOTTIME $(STARTD_CRON_JOBLIST)
> STARTD_CRON_BOOTTIME_MODE = OneShot
> STARTD_CRON_BOOTTIME_EXECUTABLE = /tmp/boot.sh
>
>
> After that, you can use "BootTime" in your start expression. Season to 
> taste.
>
>
> -greg

You might also be able to put the following in a systemd dropin file for 
the htcondor service:

ExecStartPre=/bin/sleep 300

--Mike