On Jun 23, 2020, at 10:47 AM, Isaac Johnson &lt;isaac(a)wikimedia.org&gt; wrote: I'm interested in running some long-ish scripts that loop through the dump replicas on Toolforge. Eventually, this sort of thing might move to crontab, but for now it would be nice to run a screen session as we test / debug the scripts. The problem is that if I run the scripts from my tool account (i.e. after "become <tool-name>"), I get the following error: Cannot open your terminal '/dev/pts/28' - please check. The internet indicates that this is because there is a user mismatch because of the "become" command [1]. The suggested solutions weren't clearly applicable: * I can't just skip the "become" step and run the screen session as my personal username as that's explicitly against the rules [2] (though it is possible to start a screen session from my personal username without getting the above error). * It's not clear to me that running the screen session as /dev/null is possible / smart / secure etc. Essentially, I don't have a great read on whether that actually is the correct solution or just another bad hack. So is it possible to run screen sessions from my tool account? If so, does anyone know how I might get around this issue? [1] https://stackoverflow.com/questions/21328140/screen-cannot-open-your-termin… <https://stackoverflow.com/questions/21328140/screen-cannot-open-your-terminal-dev-pts-0-please-check> [2] https://wikitech.wikimedia.org/wiki/Help:Toolforge/Rules <https://wikitech.wikimedia.org/wiki/Help:Toolforge/Rules> Best, Isaac -- Isaac Johnson (he/him/his) -- Research Scientist -- Wikimedia Foundation _______________________________________________ Wikimedia Cloud Services mailing list Cloud(a)lists.wikimedia.org (formerly labs-l(a)lists.wikimedia.org) https://lists.wikimedia.org/mailman/listinfo/cloud

When you ssh into the bastion host, make sure you use the "-t" option to

On 2020-06-23 16:47, Isaac Johnson wrote: dump crontab, but scripts. terminal You shouldn't run such script on the bastions. The grid is the way to go in this case: https://wikitech.wikimedia.org/wiki/Help:Toolforge/Grid Run your script with jsub and it will be scheduled in a grid worker node to run until it finishes. regards. -- Arturo Borrero Gonzalez SRE / Wikimedia Cloud Services Wikimedia Foundation

Using `script /dev/null` is the advice on <

Hi, On 2020-06-23 07:47, Isaac Johnson wrote: Using `script /dev/null` is the advice on <https://wikitech.wikimedia.org/wiki/Screen#Troubleshooting>, but I don't know what the security consequences/implications are either. -- Legoktm