* Debugging an mcron job @ 2019-03-11 20:05 Jack Hill 2019-03-12 19:24 ` Jack Hill 0 siblings, 1 reply; 7+ messages in thread From: Jack Hill @ 2019-03-11 20:05 UTC (permalink / raw) To: help-guix [-- Attachment #1: Type: text/plain, Size: 1591 bytes --] Hi Guix, I'm looking for help or tips on debugging an mcron job. My goal is to run a site-specific telemetry script that I have packaged [0] in my channel. The script collects some information and sends it to a remote server. I am trying to run the script as an mcron job via a service I created in my channel [1]. [0] https://gitlab.oit.duke.edu/jackhill/guix-at-duke/blob/0ed0a8e7530ef32b9e268d43b36944e38defa5f1/guix-at-duke/packages/endpoint-management.scm#L98-140 [1] https://gitlab.oit.duke.edu/jackhill/guix-at-duke/blob/0ed0a8e7530ef32b9e268d43b36944e38defa5f1/guix-at-duke/services/endpoint-management.scm So far, this looks good, and after pulling my channel, reconfiguring, and restarting mcron, I can see my job in herd schedule mcron: """ # herd schedule mcron Tue Mar 12 00:51:00 2019 -0400 /gnu/store/61692zjpkhy3jqv4a7jk1k8a14k6yn8k-planisphere-report-0-0.1b606af/bin/planisphere-report … """ However, this doesn't appear to work because after the appointed time, the remote server is not updated. If I run the planisphere-report command by hand, the remote server is updated. If I replace the planisphere-report command in my job with "/run/current-system/profile/bin/touch /tmp/test-file", test-file is indeed touched, so I know that the jobs are running. Being fairly new to Guix, and extremely new to mcron, I don't know how to debug further. Are jobs run in such a way that they don't have network access? How can I see any errors or output? Best, Jack P.S. I'm happy to accept any comments about how to improve the code in my channel as well ☺. ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Debugging an mcron job 2019-03-11 20:05 Debugging an mcron job Jack Hill @ 2019-03-12 19:24 ` Jack Hill 2019-03-12 20:33 ` Jack Hill 0 siblings, 1 reply; 7+ messages in thread From: Jack Hill @ 2019-03-12 19:24 UTC (permalink / raw) To: help-guix On Mon, 11 Mar 2019, Jack Hill wrote: > Hi Guix, > > I'm looking for help or tips on debugging an mcron job. I haven't yet solved this, but have some done some more (potentially interesting) troubleshooting. The problem only seems to present itself, when mcron is run from Shepherd. For testing purposes, I changed the schedule to run every minute. This is how mcron is being called from Shepherd: # ps -ef|grep mcron root 32463 1 0 15:11 ? 00:00:00 /gnu/store/mamwayq00mqs85kgs6ibww7xw6dy776s-mcron-1.1.1/bin/mcron /gnu/store/0h36hing715c57k9xz5f6fgm77krq4p7-mcron-job If I then run the same thing from a root shell: # /gnu/store/mamwayq00mqs85kgs6ibww7xw6dy776s-mcron-1.1.1/bin/mcron /gnu/store/0h36hing715c57k9xz5f6fgm77krq4p7-mcron-job ;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0 ;;; or pass the --no-auto-compile argument to disable. ;;; compiling /gnu/store/0h36hing715c57k9xz5f6fgm77krq4p7-mcron-job ;;; compiled /root/.cache/guile/ccache/2.2-LE-8-3.A/gnu/store/0h36hing715c57k9xz5f6fgm77krq4p7-mcron-job.go it works. What could be causing this? The contents of the job file are: (job "* * * * *" "/gnu/store/61692zjpkhy3jqv4a7jk1k8a14k6yn8k-planisphere-report-0-0.1b606af/bin/planisphere-report") Best, Jack ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Debugging an mcron job 2019-03-12 19:24 ` Jack Hill @ 2019-03-12 20:33 ` Jack Hill 2019-03-12 21:26 ` Jack Hill 0 siblings, 1 reply; 7+ messages in thread From: Jack Hill @ 2019-03-12 20:33 UTC (permalink / raw) To: help-guix I've figured out what was going wrong with my job (by redirecting the output to a file). It couldn't verify the remote host's certificate: urllib2.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:726)> Now to figure out why. I have nss-certs in my system packages. Best, Jack ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Debugging an mcron job 2019-03-12 20:33 ` Jack Hill @ 2019-03-12 21:26 ` Jack Hill 2019-04-01 20:05 ` Ludovic Courtès 2019-04-01 20:05 ` Ludovic Courtès 0 siblings, 2 replies; 7+ messages in thread From: Jack Hill @ 2019-03-12 21:26 UTC (permalink / raw) To: help-guix On Tue, 12 Mar 2019, Jack Hill wrote: > I've figured out what was going wrong with my job (by redirecting the output > to a file). It couldn't verify the remote host's certificate: > > urllib2.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate > verify failed (_ssl.c:726)> > > Now to figure out why. I have nss-certs in my system packages. I've solved this for my service by adding SSL_CERT_DIR to the environment: https://gitlab.oit.duke.edu/jackhill/guix-at-duke/blob/a9674ec7b0decac94745c91df886817e2fc8a91b/guix-at-duke/services/endpoint-management.scm Is that a reasonable solution? Best, Jack ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Debugging an mcron job 2019-03-12 21:26 ` Jack Hill @ 2019-04-01 20:05 ` Ludovic Courtès 2019-04-01 20:05 ` Ludovic Courtès 1 sibling, 0 replies; 7+ messages in thread From: Ludovic Courtès @ 2019-04-01 20:05 UTC (permalink / raw) To: Jack Hill; +Cc: help-guix Hello, Jack Hill <jackhill@jackhill.us> skribis: > On Tue, 12 Mar 2019, Jack Hill wrote: > >> I've figured out what was going wrong with my job (by redirecting >> the output to a file). It couldn't verify the remote host's >> certificate: >> >> urllib2.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] >> certificate verify failed (_ssl.c:726)> >> >> Now to figure out why. I have nss-certs in my system packages. > > I've solved this for my service by adding SSL_CERT_DIR to the environment: > > https://gitlab.oit.duke.edu/jackhill/guix-at-duke/blob/a9674ec7b0decac94745c91df886817e2fc8a91b/guix-at-duke/services/endpoint-management.scm > > Is that a reasonable solution? I’m (very) late to the party but what you did looks like the right thing to me. Ludo’. ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Debugging an mcron job 2019-03-12 21:26 ` Jack Hill 2019-04-01 20:05 ` Ludovic Courtès @ 2019-04-01 20:05 ` Ludovic Courtès 2019-04-01 20:52 ` Jack Hill 1 sibling, 1 reply; 7+ messages in thread From: Ludovic Courtès @ 2019-04-01 20:05 UTC (permalink / raw) To: Jack Hill; +Cc: help-guix Hello, Jack Hill <jackhill@jackhill.us> skribis: > On Tue, 12 Mar 2019, Jack Hill wrote: > >> I've figured out what was going wrong with my job (by redirecting >> the output to a file). It couldn't verify the remote host's >> certificate: >> >> urllib2.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] >> certificate verify failed (_ssl.c:726)> >> >> Now to figure out why. I have nss-certs in my system packages. > > I've solved this for my service by adding SSL_CERT_DIR to the environment: > > https://gitlab.oit.duke.edu/jackhill/guix-at-duke/blob/a9674ec7b0decac94745c91df886817e2fc8a91b/guix-at-duke/services/endpoint-management.scm > > Is that a reasonable solution? I’m (very) late to the party but what you did looks like the right thing to me. Ludo’. PS: Good to see you’re building interesting stuff with this! ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Debugging an mcron job 2019-04-01 20:05 ` Ludovic Courtès @ 2019-04-01 20:52 ` Jack Hill 0 siblings, 0 replies; 7+ messages in thread From: Jack Hill @ 2019-04-01 20:52 UTC (permalink / raw) To: Ludovic Courtès; +Cc: help-guix [-- Attachment #1: Type: text/plain, Size: 650 bytes --] On Mon, 1 Apr 2019, Ludovic Courtès wrote: > Jack Hill <jackhill@jackhill.us> skribis: >> I've solved this for my service by adding SSL_CERT_DIR to the environment: >> >> https://gitlab.oit.duke.edu/jackhill/guix-at-duke/blob/a9674ec7b0decac94745c91df886817e2fc8a91b/guix-at-duke/services/endpoint-management.scm >> >> Is that a reasonable solution? > > I’m (very) late to the party but what you did looks like the right thing > to me. No worries, I still find the sanity check helpful. > PS: Good to see you’re building interesting stuff with this! Me too :) I've really enjoyed working with the Guix and mcron building blocks. Best, Jack ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2019-04-01 20:52 UTC | newest] Thread overview: 7+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2019-03-11 20:05 Debugging an mcron job Jack Hill 2019-03-12 19:24 ` Jack Hill 2019-03-12 20:33 ` Jack Hill 2019-03-12 21:26 ` Jack Hill 2019-04-01 20:05 ` Ludovic Courtès 2019-04-01 20:05 ` Ludovic Courtès 2019-04-01 20:52 ` Jack Hill
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).