Cloud-announce December 2018

cloud-announce@lists.wikimedia.org

5 participants
7 discussions

[Survey] Help Improve MediaWiki Action API Technical Documentation
by Sarah R 04 Jan '19

04 Jan '19

Hi Everyone, Over the last few months, the Wikimedia Developer Advocacy team has been working to improve technical documentation for the MediaWiki Action API <https://www.mediawiki.org/wiki/API:Main_page>. So far, we have: - Started efforts to revise, simplify, and reorganize the MediaWiki Action API pages on MediaWiki using a new documentation template for sub-pages: https://www.mediawiki.org/wiki/API:Documentation_template - Updated the API navigation-template: https://www.mediawiki.org/wiki/Template:API As we continue to make improvements to the technical documentation, we could use your help to better guide our efforts! Would you please take a few moments to complete the following survey and share your opinions and experiences with us? https://goo.gl/forms/Y5PGILb6b3awC3OJ2 *Notes about the Mediawiki Action API Survey:* *Survey Period: *December 6, 2018 - January 6, 2019 *Privacy Policy:* This survey will be conducted via a third-party service, which may subject it to additional terms. For more information on privacy and data-handling, see the survey privacy statement https://foundation.wikimedia.org/wiki/MediaWiki_Action_API_Survey_Privacy_S… . Thanks for your participation! Kindly, Sarah R. Rodlund Technical Writer, Developer Advocacy <https://meta.wikimedia.org/wiki/Developer_Advocacy> srodlund(a)wikimedia.org

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Grid outage tomorrow, 16:00 UTC
by Andrew Bogott 21 Dec '18

21 Dec '18

Tomorrow I'll be moving the grid engine master node to a new virt host. That will cause a 15-minute outage during which new jobs (crons, or things submitted by hand) will fail. Existing jobs or webservices will be unaffected by the downtime. I'll start the move at 16:00 UTC on Friday, 2018-12-21. That's 8AM in California. -Andrew

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CloudVPS network maintenance tomorrow 2018-12-20 @ 17:00 UTC
by Arturo Borrero Gonzalez 21 Dec '18

21 Dec '18

Hi! Tomorrow 2018-12-20 @ 17:00 UTC (~24h from now) we will be conducting some network maintenance in Cloud VPS (openstack). We will be doing some works on the transport network that connects the Neutron server to the rest of the internet. Running CloudVPS instances will see a brief connection problem if connected to any external service (outside CloudVPS). If everything goes fine, according to our tests all should be fine, all operations will be finished in just a couple of minutes. Let us know any issue you may find. Thanks.

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BigBrother has been disabled
by Giovanni Tirloni 12 Dec '18

12 Dec '18

Hello, Today we have disabled BigBrother in Toolforge. BigBrother was a tool that monitored continuous jobs that failed to get restarted because they ran into corner cases where Grid Engine wasn't sufficiently smart to re-start them (e.g. out of memory). BigBrother would continuously monitor those jobs and duplicate that functionality on a layer above Grid Engine. Although very few tools used BigBrother (0.65% to be more precise), it taxed our NFS file server constantly so keeping it around didn't make much sense. Additionally, its functionality could be easily implemented with a shell script running from cron. So we've converted all tools that had a .bigbrotherrc file to using a bigbrother.sh script that is triggered every 5min to restart jobs. If your tool used BigBrother, please check your crontab (`crontab -l`) and will see a few entries like this: ``` # Ensure continuous jobs are running */5 * * * * jlocal /data/project/tool_name/bigbrother.sh job_name job_script ``` Documentation has also been updated to reflect this change: https://wikitech.wikimedia.org/wiki/Help:Toolforge/Grid#Bigbrother_(Depreca… In our tests everything worked fine but please let us know if your tool is being impacted by this change. Regards, -- Giovanni Tirloni Operations Engineer Wikimedia Cloud Services

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Dumps NFS maintenance - 2018-12-03 @ 1700 UTC and 2018-12-07 @ 1700 UTC
by Brooke Storm 08 Dec '18

08 Dec '18

On Monday, December 3rd, 2018 at 1700 UTC, we will be rebooting one of the two dumps NFS servers (labstore1006.wikimedia.org <http://labstore1006.wikimedia.org/>). This should cause rising load issues briefly, but should be quick enough that failing over services is likely to not be helpful. We will be failing over the web service before that time and failing it back before rebooting the partner server (labstore1007.wikimedia.org <http://labstore1007.wikimedia.org/>) on Friday, December 7th at 1700 UTC. This should not interrupt services to dumps.wikimedia.org <http://dumps.wikimedia.org/> (the site hosted on these systems) since that should be failed over to the non-rebooting partner. Brooke Storm Operations Engineer Wikimedia Cloud Services bstorm(a)wikimedia.org <mailto:bstorm@wikimedia.org> IRC: bstorm_

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additional monitoring on cloudvirts -- don't run them empty!
by Andrew Bogott 07 Dec '18

07 Dec '18

I recently noticed that some of our standard kvm/nova monitoring never got copied over from the labvirt puppet code to the cloudvirt puppet code. Tomorrow I will merge https://gerrit.wikimedia.org/r/#/c/operations/puppet/+/478113/ to fix that. Once that patch is merged, icinga will be a bit touchier on the cloudvirts. In particular, it will alert for any cloudvirt that has 0 VMs running on it. (This turns out to be a useful thing to watch for because we've had cases where every single kvm process died at once.) So, all 'idle' cloudvirts should nonetheless have a canary instance. For example, on the new analytics cloudvirts I created canaries like this: $ OS_PROJECT_ID=testlabs openstack server create --image 7c6371d1-8411-48c7-bf73-2ef6d6ff2a15 --flavor m1.small --nic net-id=7425e328-560c-4f00-8e99-706f3fb90bb4 --availability-zone host:cloudvirtan1004 canary-an1004-01 Once a virt host is in full service we can leave the canaries there or delete them -- there hasn't been any real consistent policy there. In related news, I'm attempting to silence cloudvirt1019 and 1020 altogether with https://gerrit.wikimedia.org/r/#/c/operations/puppet/+/478115/ because we reboot them twice a day and a reboot always kills any running VMs. -Andrew

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Neutron region migrations, round five
by Andrew Bogott 05 Dec '18

05 Dec '18

With any luck we'll have some more hardware installed by next week, so it's time to move more projects! This is probably the last round of bulk moves; after this it's all special cases for which I'll contact people directly. Tuesday, 2018-12-11: maps, wm-bot Wednesday, 2018-12-12: mwoffliner, wildcat Thursday, 2018-12-13: snuggle, services, commonsarchive, wikitextexp Friday, 2018-12-14: queryrapi, wikidumpparse, wikistats, butterfly Monday 2018-12-17: huggle, incubator, iiab, openrefine, wcdo, wikidataconcepts Tuesday 2018-12-18: wikimetrics, newsletter, telnet, signwriting, ogvjs-ingetration Wednesday 2018-12-19: multimedia, orig, security-tools, phragile, wikistream, otrs, yandex-proxy Thursday 2018-12-20: dashiki, etytree, partnermetrics, graphql Some context for what this is all about can be found here: https://phabricator.wikimedia.org/phame/post/view/120/neutron_is_here/ Please let me know if you are involved in one those projects and need to postpone the move, or schedule a to-the-minute migration window. - Andrew + the WMCS team

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Cloud-announce December 2018