Deployments/Train

Deployments
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The Deployment Train is a weekly process led by the Release Engineering Team, to deploy the latest alpha version of MediaWiki at WMF to production.

Typical numbers as of September 2021:

• 198 code repositories (mediawiki/core, mediawiki/vendor, 188 MW extensions, and 8 MW skins).
• 978 wikis.
• betwen 150 and 1000 patches since the last train.

Current week

• Train status: https://versions.toolforge.org/
• Train blocker task: https://train-blockers.toolforge.org/

Schedule

See also MediaWiki 1.39/Roadmap on mediawiki.org

Deployment train diagram.

Sunday	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday
		Deploy to group 0	Deploy to group 1	Deploy to group 2

Groups

Tuesday

Each Tuesday a Release Engineering team member cuts a new branch of all 198 repositories in a Wikimedia Production deployment. The branch is always prefixed with wmf/ and then a version number. For example: wmf/1.37.0-wmf.1.

The train conductor deploys that to Group0 wikis (see dblists/group0.dblist). This group includes:

• www.mediawiki.org (mediawikiwiki)
• test.wikipedia.org (testwiki)
• test.wikidata.org (testwikidatawiki)
• office.wikimedia.org (officewiki)
• all closed wikis

Wednesday

On Wednesday Release Engineering leads a log triage session to find and file any new errors.

Following the log triage, the train conductor for the week makes a go/no-go decision to deploy to Group1 wikis.

Group1 is non-Wikipedias, see dblists/group1.dblist.

Group1 includes:

• www.wikidata.org (wikidatawiki)
• *.wiktionary.org (all Wiktionary sites)
• *.wikisource.org (all Wikisource sites)
• *.wikinews.org (all Wikinews sites)
• *.wikibooks.org (all Wikibooks sites)
• *.wikiquote.org (all Wikiquote sites)
• *.wikivoyage.org (all Wikivoyage sites)
• *.wikiversity.org (all Wikiversity sites)
• commons.wikimedia.org (Wikimedia Commons)
• meta.wikimedia.org (Meta-Wiki)
• incubator.wikimedia.org (Incubator)
• ca.wikipedia.org (Catalan Wikipedia)
• he.wikipedia.org (Hebrew Wikipedia)
• it.wikipedia.org (Italian Wikipedia)
• test2.wikipedia.org (test2wiki)
• and others…

Thursday

If no blockers are found, the train conductor pushes code to all other Wikipedias, see dblists/group2.dblist.

Group2 includes en.wikipedia.org (English Wikipedia).