Deployments

Notes:

• Ask for a little more time than what you think you'll need for deployment and testing; you never know what issues may come up and slow you down.
  • Generally, we have found one hour to be a good size for most things.
• Deployment windows are 'pinned' to the time in San Francisco and thus the UTC time will change due to the United States observance of Daylight Savings Time as appropriate.
• Backport windows are for pushing out simple and low-risk changes (as assessed by you, backport team, and the Release Engineering Team). They happen on Mondays to Thursdays at:
  • "European Mid-day backport window", 04:00 Pacific
  • "Morning backport window", 11:00 Pacific (except Tuesdays)
  • "Evening backport window", 16:00 Pacific

For detailed instructions on how to actually deploy code to the Wikimedia servers, see How to deploy code.

Deployments
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This page tracks upcoming deployments of software to the Wikimedia Foundation servers that host Wikimedia project sites (Wikipedia, Wiktionary, Wikiversity, Wikimedia Commons, etc.).

Cadence

For the core software ("MediaWiki"): The Wikimedia Foundation currently follows a one-week deploy cadence. This means that there is one week between updates to any one Wikimedia project site wiki (excluding urgent fixes, of course).

For other non-core software: Each team is responsible for their own schedule.

Scheduling

To schedule a deploy window, or if you see a potential conflict with your upcoming deployment, please contact the Release Engineering Team on IRC at #wikimedia-releng ^connect; pinging Greg (greg-g) or Tyler (thcipriani) directly helps.

Inclusion criteria

See the list at Inclusion criteria for the kinds of changes that require scheduling here.

Long running tasks/scripts

While not strictly a deployment, performing long running (>1 hour) tasks (eg: migration scripts) can encounter issues when code is updated while a script is being run. For this reason it is required to add an entry in the calendar for the task with a window that accounts for the anticipated start time and estimated length for the task.

Communicating

• Every major or new feature deployment should be announced on the Wikimedia blog and/or Tech News (use the "user-notice" tag on Phabricator) and/or global on-wiki delivery. For routine and maintenance deployments, listing your change here is enough.
• Changes that are liable to affect site performance or infrastructure should be announced on the ops mailing list. This includes anything that alters caching behavior, introduces cookies, substantially increases the static asset payload, or adds new and complicated query patterns.

Something went wrong‽ (see also Incident response)

• Is there a user-impacting or other severe issue?
  • Communicate this in the #wikimedia-operations ^connect IRC channel.
  • Add the #wikimedia-incident project to any relevant Phabricator task; if appropriate set to UBN! priority.
• What happens next?
  • In case of halting or reverting the weekly train

Near-term

NOTE: You can also subscribe to the "WMF Deployments" google calendar by adding <wikimedia.org_rudis09ii2mm5fk4hgdjeh1u64@group.calendar.google.com>. This does not always get one-off windows that are noted below. This wiki page is the canonical deployment schedule and any differences with the google calendar are to be interpreted as the google calendar being incorrect.

Week of June 08

Time	Component	Deployer	Changes
Sunday, June 07
07:00–07:00 UTC # 00:00–00:00 PDT	No deploys all day! See Deployments/Emergencies if things are broken.		No Deploys
Monday, June 08
10:30–11:00 UTC # 03:30–04:00 PDT	Wikimedia Portals Update	Jan Drewniak (jan_drewniak)	Weekly window for the portals page: https://www.wikipedia.org/
11:00–12:00 UTC # 04:00–05:00 PDT	European Mid-day backport window (Max 6 patches)	Amir (Amir1), Lucas (Lucas_WMDE), Adam (awight), Martin (Urbanecm)	tgr [config] 601409 (deploy commands) Enable GrowthExperiments guidance behind a hidden preference Lucas Werkmeister (lucaswerkmeister) [config] 602981 (deploy commands) Remove Wikibase idBlacklist setting Requesting Developer (irc-nickname) Gerrit link to backport or config change
17:00–17:30 UTC # 10:00–10:30 PDT	Wikidata Query Service weekly deploy	Guillaume (gehel), Mathew (onimisionipe)	...
18:00–19:00 UTC # 11:00–12:00 PDT	Morning backport window (Max 6 patches)	Roan (RoanKattouw), Niharika (Niharika), Martin (Urbanecm)	Petr Pchelko (Pchelolo) 603514 (deploy commands) [Config] Disable HTCP purges for test.wikipedia.org RoanKattouw 603548 (deploy commands) [config] Disable A/B test for GrowthExperiments homepage Requesting Developer (irc-nickname) Gerrit link to backport or config change
20:00–21:00 UTC # 13:00–14:00 PDT	Services – Graphoid / Citoid / ORES	Aaron (halfak)), Andy (accraze)	See Graphoid
21:00–23:00 UTC # 14:00–16:00 PDT	Weekly Security deployment window	Sam (Reedy), Scott (sbassett)	Held deployment window for Security-team related deploys.
23:00–00:00 UTC # 16:00–17:00 PDT	Evening backport window (Max 6 patches)	Roan (RoanKattouw), Niharika (Niharika), Martin (Urbanecm)	Requesting Developer (irc-nickname) Gerrit link to backport or config change
Tuesday, June 09
11:00–12:00 UTC # 04:00–05:00 PDT	European Mid-day backport window (Max 6 patches)	Amir (Amir1), Lucas (Lucas_WMDE), Adam (awight), Martin (Urbanecm)	Ammar Abdulhamid (Ammarpad) [Config] 603524 (deploy commands) Remove Mobile mainpage special casing from it and vec wikisources Requesting Developer (irc-nickname) Gerrit link to backport or config change
16:00–17:00 UTC # 09:00–10:00 PDT	Puppet request window (Max 6 patches)	Filippo (godog), Giuseppe (_joe_)	Requesting Developer (irc-nickname) Gerrit link to Puppet change
17:00–18:00 UTC # 10:00–11:00 PDT	Services – Graphoid / Citoid / ORES	Aaron (halfak)), Andy (accraze)	See Graphoid
18:00–19:00 UTC # 11:00–12:00 PDT	Pre MediaWiki train sanity break		No Deploys
19:00–21:00 UTC # 12:00–14:00 PDT	Mediawiki train - American+European Version	Jeena (longma), Lars (liw)	1.35 schedule group0 1.35.0-wmf.35->1.35.0-wmf.36 group1 1.35.0-wmf.35 group2 1.35.0-wmf.35 group0 to 1.35.0-wmf.36 Blockers: task T254173
23:00–00:00 UTC # 16:00–17:00 PDT	Evening backport window (Max 6 patches)	Roan (RoanKattouw), Niharika (Niharika), Martin (Urbanecm)	Samuel (RhinosF1) 603453 (deploy commands) Enable WikiLove on slwiki 603365 (deploy commands) Add namespace alias and project namespace for hiwikibooks 599810 (deploy commands) Enable VE on bnwikibook's wikijunior namespace Requesting Developer (irc-nickname) Gerrit link to backport or config change
Wednesday, June 10
11:00–12:00 UTC # 04:00–05:00 PDT	European Mid-day backport window (Max 6 patches)	Amir (Amir1), Lucas (Lucas_WMDE), Adam (awight), Martin (Urbanecm)	Requesting Developer (irc-nickname) Gerrit link to backport or config change
13:00–15:00 UTC # 06:00–08:00 PDT	Mediawiki train - American+European Version (secondary timeslot)	Jeena (longma), Lars (liw)	1.35 schedule group0 1.35.0-wmf.36 group1 1.35.0-wmf.35->1.35.0-wmf.36 group2 1.35.0-wmf.35 group1 to 1.35.0-wmf.36 Blockers: task T254173
15:00–17:00 UTC # 08:00–10:00 PDT	Moving CDN purges to kafka	_joe_, Pchelolo	Petr Pchelko (Pchelolo) [no-op config] 603649 (deploy commands) Add precautions for kafka-purges before transition [config] 603654 (deploy commands) Enable kafka purges everywhere [config] 603655 (deploy commands) Disable HTCP purges everywhere
18:00–19:00 UTC # 11:00–12:00 PDT	Train log triage with CPT	Jeena (longma), Lars (liw) + CPT	See Heterogeneous_deployment/Train_deploys#Breakage
18:00–19:00 UTC # 11:00–12:00 PDT	Morning backport window (Max 6 patches)	Roan (RoanKattouw), Niharika (Niharika), Martin (Urbanecm)	Bartosz (MatmaRex) [wmf.35] 604138 (deploy commands) [ext/VisualEditor] Make VisualEditorDisableForAnons only hide the tabs, not disable the editor [wmf.36] 604139 (deploy commands) [ext/VisualEditor] Make VisualEditorDisableForAnons only hide the tabs, not disable the editor Requesting Developer (irc-nickname) Gerrit link to backport or config change
19:00–21:00 UTC # 12:00–14:00 PDT	Mediawiki train - American+European Version	Jeena (longma), Lars (liw)	1.35 schedule group0 1.35.0-wmf.36 group1 1.35.0-wmf.35->1.35.0-wmf.36 group2 1.35.0-wmf.35 group1 to 1.35.0-wmf.36 Blockers: task T254173
20:00–21:00 UTC # 13:00–14:00 PDT	Services – Graphoid / Citoid / ORES	Aaron (halfak)), Andy (accraze)	See Graphoid
23:00–00:00 UTC # 16:00–17:00 PDT	Evening backport window (Max 6 patches)	Roan (RoanKattouw), Niharika (Niharika), Martin (Urbanecm)	Jdlrobson [1.35.0-wmf.36] Don't modify OutputPage value 604520 (deploy commands) (ubn) Requesting Developer (irc-nickname) Gerrit link to backport or config change
Thursday, June 11
00:00–01:00 UTC # (Wed) 17:00–18:00 PDT	Phabricator update	Mukunda (twentyafterfour)	HOLD: Window to update phabricator.wikimedia.org
11:00–12:00 UTC # 04:00–05:00 PDT	European Mid-day backport window (Max 6 patches)	Amir (Amir1), Lucas (Lucas_WMDE), Adam (awight), Martin (Urbanecm)	Matthias (matthiasmullie) [wmf.36] Backport of 604420 (deploy commands) Requesting Developer (irc-nickname) Gerrit link to backport or config change
13:00–15:00 UTC # 06:00–08:00 PDT	Mediawiki train - American+European Version (secondary timeslot)	Jeena (longma), Lars (liw)	1.35 schedule group0 1.35.0-wmf.36 group1 1.35.0-wmf.36 group2 1.35.0-wmf.35->1.35.0-wmf.36 group2 to 1.35.0-wmf.36 Blockers: task T254173
16:00–17:00 UTC # 09:00–10:00 PDT	Puppet request window (Max 6 patches)	Filippo (godog), Giuseppe (_joe_)	Requesting Developer (irc-nickname) Gerrit link to Puppet change
17:00–18:00 UTC # 10:00–11:00 PDT	Services – Graphoid / Citoid / ORES	Aaron (halfak)), Andy (accraze)	See Graphoid
18:00–19:00 UTC # 11:00–12:00 PDT	Morning backport window (Max 6 patches)	Roan (RoanKattouw), Niharika (Niharika), Martin (Urbanecm)	Requesting Developer (irc-nickname) Gerrit link to backport or config change
19:00–21:00 UTC # 12:00–14:00 PDT	Mediawiki train - American+European Version	Jeena (longma), Lars (liw)	1.35 schedule group0 1.35.0-wmf.36 group1 1.35.0-wmf.36 group2 1.35.0-wmf.35->1.35.0-wmf.36 group2 to 1.35.0-wmf.36 Blockers: task T254173
23:00–00:00 UTC # 16:00–17:00 PDT	Evening backport window (Max 6 patches)	Roan (RoanKattouw), Niharika (Niharika), Martin (Urbanecm)	Requesting Developer (irc-nickname) Gerrit link to backport or config change
Friday, June 12
07:00–07:00 UTC # 00:00–00:00 PDT	No deploys all day! See Deployments/Emergencies if things are broken.		No Deploys
Saturday, June 13
07:00–07:00 UTC # 00:00–00:00 PDT	No deploys all day! See Deployments/Emergencies if things are broken.		No Deploys

Week of June 15

Time	Component	Deployer	Changes
Sunday, June 14
07:00–07:00 UTC # 00:00–00:00 PDT	No deploys all day! See Deployments/Emergencies if things are broken.		No Deploys
Monday, June 15
10:30–11:00 UTC # 03:30–04:00 PDT	Wikimedia Portals Update	Jan Drewniak (jan_drewniak)	Weekly window for the portals page: https://www.wikipedia.org/
11:00–12:00 UTC # 04:00–05:00 PDT	European mid-day backport window (Max 6 patches)	Amir (Amir1), Lucas (Lucas_WMDE), Adam (awight), Martin (Urbanecm)	Requesting Developer (irc-nickname) Gerrit link to backport or config change
17:00–17:30 UTC # 10:00–10:30 PDT	Wikidata Query Service weekly deploy	Guillaume (gehel), Mathew (onimisionipe)	...
18:00–19:00 UTC # 11:00–12:00 PDT	Morning backport window (Max 6 patches)	Roan (RoanKattouw), Niharika (Niharika), Martin (Urbanecm)	Requesting Developer (irc-nickname) Gerrit link to backport or config change
20:00–21:00 UTC # 13:00–14:00 PDT	Services – Graphoid / Citoid / ORES	Aaron (halfak)), Andy (accraze)	See Graphoid
21:00–23:00 UTC # 14:00–16:00 PDT	Weekly Security deployment window	Sam (Reedy), Scott (sbassett)	Held deployment window for Security-team related deploys.
23:00–00:00 UTC # 16:00–17:00 PDT	Evening backport window (Max 6 patches)	Roan (RoanKattouw), Niharika (Niharika), Martin (Urbanecm)	Requesting Developer (irc-nickname) Gerrit link to backport or config change
Tuesday, June 16
11:00–12:00 UTC # 04:00–05:00 PDT	European mid-day backport window (Max 6 patches)	Amir (Amir1), Lucas (Lucas_WMDE), Adam (awight), Martin (Urbanecm)	Requesting Developer (irc-nickname) Gerrit link to backport or config change
12:00–13:00 UTC # 05:00–06:00 PDT	Pre MediaWiki train sanity break		No Deploys
13:00–15:00 UTC # 06:00–08:00 PDT	Mediawiki train - European+American Version	Lars (liw), Brennen (brennen)	1.35 schedule group0 1.35.0-wmf.36->1.35.0-wmf.37 group1 1.35.0-wmf.36 group2 1.35.0-wmf.36 group0 to 1.35.0-wmf.37 Blockers: task T254174
16:00–17:00 UTC # 09:00–10:00 PDT	Puppet request window (Max 6 patches)	Filippo (godog), Giuseppe (_joe_)	Requesting Developer (irc-nickname) Gerrit link to Puppet change
17:00–18:00 UTC # 10:00–11:00 PDT	Services – Graphoid / Citoid / ORES	Aaron (halfak)), Andy (accraze)	See Graphoid
18:00–19:00 UTC # 11:00–12:00 PDT	Morning backport window (Max 6 patches)	Roan (RoanKattouw), Niharika (Niharika), Martin (Urbanecm)	Requesting Developer (irc-nickname) Gerrit link to backport or config change
19:00–21:00 UTC # 12:00–14:00 PDT	Mediawiki train - European+American Version (secondary timeslot)	Lars (liw), Brennen (brennen)	1.35 schedule group0 1.35.0-wmf.36->1.35.0-wmf.37 group1 1.35.0-wmf.36 group2 1.35.0-wmf.36 group0 to 1.35.0-wmf.37 Blockers: task T254174
23:00–00:00 UTC # 16:00–17:00 PDT	Evening backport window (Max 6 patches)	Roan (RoanKattouw), Niharika (Niharika), Martin (Urbanecm)	Requesting Developer (irc-nickname) Gerrit link to backport or config change
Wednesday, June 17
11:00–12:00 UTC # 04:00–05:00 PDT	European mid-day backport window (Max 6 patches)	Amir (Amir1), Lucas (Lucas_WMDE), Adam (awight), Martin (Urbanecm)	Requesting Developer (irc-nickname) Gerrit link to backport or config change
12:00–13:00 UTC # 05:00–06:00 PDT	Pre MediaWiki train sanity break		No Deploys
13:00–15:00 UTC # 06:00–08:00 PDT	Mediawiki train - European+American Version	Lars (liw), Brennen (brennen)	1.35 schedule group0 1.35.0-wmf.37 group1 1.35.0-wmf.36->1.35.0-wmf.37 group2 1.35.0-wmf.36 group1 to 1.35.0-wmf.37 Blockers: task T254174
18:00–19:00 UTC # 11:00–12:00 PDT	Train log triage with CPT	Lars (liw), Brennen (brennen) + CPT	See Heterogeneous_deployment/Train_deploys#Breakage
18:00–19:00 UTC # 11:00–12:00 PDT	Morning backport window (Max 6 patches)	Roan (RoanKattouw), Niharika (Niharika), Martin (Urbanecm)	Requesting Developer (irc-nickname) Gerrit link to backport or config change
19:00–21:00 UTC # 12:00–14:00 PDT	Mediawiki train - European+American Version (secondary timeslot)	Lars (liw), Brennen (brennen)	1.35 schedule group0 1.35.0-wmf.37 group1 1.35.0-wmf.36->1.35.0-wmf.37 group2 1.35.0-wmf.36 group1 to 1.35.0-wmf.37 Blockers: task T254174
20:00–21:00 UTC # 13:00–14:00 PDT	Services – Graphoid / Citoid / ORES	Aaron (halfak)), Andy (accraze)	See Graphoid
23:00–00:00 UTC # 16:00–17:00 PDT	Evening backport window (Max 6 patches)	Roan (RoanKattouw), Niharika (Niharika), Martin (Urbanecm)	Requesting Developer (irc-nickname) Gerrit link to backport or config change
Thursday, June 18
00:00–01:00 UTC # (Wed) 17:00–18:00 PDT	Phabricator update	Mukunda (twentyafterfour)	HOLD: Window to update phabricator.wikimedia.org
11:00–12:00 UTC # 04:00–05:00 PDT	European mid-day backport window (Max 6 patches)	Amir (Amir1), Lucas (Lucas_WMDE), Adam (awight), Martin (Urbanecm)	Requesting Developer (irc-nickname) Gerrit link to backport or config change
12:00–13:00 UTC # 05:00–06:00 PDT	Pre MediaWiki train sanity break		No Deploys
13:00–15:00 UTC # 06:00–08:00 PDT	Mediawiki train - European+American Version	Lars (liw), Brennen (brennen)	1.35 schedule group0 1.35.0-wmf.37 group1 1.35.0-wmf.37 group2 1.35.0-wmf.36->1.35.0-wmf.37 group2 to 1.35.0-wmf.37 Blockers: task T254174
16:00–17:00 UTC # 09:00–10:00 PDT	Puppet request window (Max 6 patches)	Filippo (godog), Giuseppe (_joe_)	Requesting Developer (irc-nickname) Gerrit link to Puppet change
17:00–18:00 UTC # 10:00–11:00 PDT	Services – Graphoid / Citoid / ORES	Aaron (halfak)), Andy (accraze)	See Graphoid
18:00–19:00 UTC # 11:00–12:00 PDT	Morning backport window (Max 6 patches)	Roan (RoanKattouw), Niharika (Niharika), Martin (Urbanecm)	Requesting Developer (irc-nickname) Gerrit link to backport or config change
19:00–21:00 UTC # 12:00–14:00 PDT	Mediawiki train - European+American Version (secondary timeslot)	Lars (liw), Brennen (brennen)	1.35 schedule group0 1.35.0-wmf.37 group1 1.35.0-wmf.37 group2 1.35.0-wmf.36->1.35.0-wmf.37 group2 to 1.35.0-wmf.37 Blockers: task T254174
23:00–00:00 UTC # 16:00–17:00 PDT	Evening backport window (Max 6 patches)	Roan (RoanKattouw), Niharika (Niharika), Martin (Urbanecm)	Requesting Developer (irc-nickname) Gerrit link to backport or config change
Friday, June 19
07:00–07:00 UTC # 00:00–00:00 PDT	No deploys all day! See Deployments/Emergencies if things are broken.		No Deploys
Saturday, June 20
07:00–07:00 UTC # 00:00–00:00 PDT	No deploys all day! See Deployments/Emergencies if things are broken.		No Deploys

Past deployments

• /Archive

See also

• Backport windows