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Maniphest T126628

Allow wikitech to write files for Math
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Description

During this second attempt to deploy Math on the wikitech extension, we got a new error:

2016-02-11 16:57:23 silver labswiki 1.27.0-wmf.13 exception ERROR: [efc7b4f6] /wiki/User:Dereckson/Sandbox   FileBackendException from 
                    line 154 of /srv/mediawiki/php-1.27.0-wmf.13/includes/filebackend/FileBackendGroup.php: No backend defined with the name 
                    `global-multiwrite`. {"exception_id":"efc7b4f6"}

This is probably triggered when Math tries to save the rendered PNG.

Details

SubjectRepoBranchLines +/-
Set wgMathFileBackend to false for wikitech wikisoperations/mediawiki-configmaster+1 -1
Test file backend for Math on labtestwikioperations/mediawiki-configmaster+4 -1
Customize wgMathDirectory for wikitechoperations/mediawiki-configmaster+5 -1
Create /srv/math-images on wikitech hostsoperations/puppetproduction+8 -0
Customize query in gerrit

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Event Timeline

Dereckson created this task.Feb 11 2016, 5:20 PM
Dereckson raised the priority of this task from to Medium.
Dereckson updated the task description. (Show Details)
Dereckson added projects: Wikimedia-Site-requests, Cloud-Services, wikitech.wikimedia.org.
Dereckson added subscribers: Matanya, Krenair, JEumerus and 2 others.
Krenair added a comment.Feb 11 2016, 5:24 PM

Maybe we just want to set wmgMathFileBackend = 'local-multiwrite' on wikitech (does that exist? no idea how to list them)? Note that Captcha on wikitech is disabled for this reason.

Dereckson added subscribers: Andrew, Dereckson.Feb 11 2016, 5:39 PM

@Andrew Could you enable Math extension on https://labtestwikitech.wikimedia.org/ and check if that local-multiwrite file backend works?

Dereckson added a comment.Feb 11 2016, 5:40 PM

Nevermind, I see it's managed by our main operations/mediawiki-config repo, using labtestwikitech as database key.

Krenair added a comment.Feb 11 2016, 5:51 PM

Actually it's labtestwiki.

Dereckson added a comment.Feb 11 2016, 11:29 PM
In T126628#2019255, @Krenair wrote:

Actually it's labtestwiki.

I'm fixing a slight error in this case.

gerritbot subscribed.Feb 12 2016, 12:12 AM

Change 270146 had a related patch set uploaded (by Dereckson):
Test file backend for Math on labtestwiki

https://gerrit.wikimedia.org/r/270146

gerritbot added a project: Patch-For-Review.Feb 12 2016, 12:12 AM
Dereckson moved this task from Backlog to Working on on the Wikimedia-Site-requests board.Feb 12 2016, 12:37 AM
• AlexMonk-WMF subscribed.Jul 23 2016, 2:25 PM

I understand a bit more about how the file backends work these days, and I think this would make wikitech attempt to connect to production's Swift, which we probably don't want to become dependent on.

Dereckson moved this task from Working on to To deploy on the Wikimedia-Site-requests board.Aug 30 2016, 12:26 PM
Dereckson moved this task from To deploy to Blocked on SRE on the Wikimedia-Site-requests board.Aug 31 2016, 1:06 PM
Dereckson renamed this task from Allow wikitech to write files to Allow wikitech to write files for Math.Sep 2 2016, 12:34 AM
gerritbot added a comment.Sep 2 2016, 12:37 AM

Change 308110 had a related patch set uploaded (by Dereckson):
Customize wgMathDirectory for wikitech

https://gerrit.wikimedia.org/r/308110

gerritbot added a comment.Sep 2 2016, 12:46 AM

Change 308112 had a related patch set uploaded (by Dereckson):
Create /srv/math-images on wikitech hosts

https://gerrit.wikimedia.org/r/308112

Dereckson mentioned this in T126338: Enable math extension on wikitech.Sep 2 2016, 12:51 AM
gerritbot added a comment.Sep 2 2016, 12:53 AM

Change 308112 merged by Dzahn:
Create /srv/math-images on wikitech hosts

https://gerrit.wikimedia.org/r/308112

gerritbot added a comment.Sep 2 2016, 1:00 AM

Change 308110 merged by jenkins-bot:
Customize wgMathDirectory for wikitech

https://gerrit.wikimedia.org/r/308110

Stashbot subscribed.Sep 2 2016, 1:05 AM

Mentioned in SAL [2016-09-02T01:05:38Z] <dereckson@tin> Synchronized wmf-config/InitialiseSettings.php: Customize wgMathDirectory for wikitech (T126628, 1/2) (duration: 00m 47s)

Stashbot added a comment.Sep 2 2016, 1:06 AM

Mentioned in SAL [2016-09-02T01:06:35Z] <dereckson@tin> Synchronized wmf-config/CommonSettings.php: Customize wgMathDirectory for wikitech (T126628, 2/2) (duration: 00m 46s)

Dereckson added a comment.Sep 2 2016, 1:16 AM

Changes have been deployed.

We've still a math_output_error error returned here:

MathTexvc.php
$backend = $this->getBackend();
# Create any containers/directories as needed...
if ( !$backend->prepare( [ 'dir' => $hashpath ] )->isOK() ) {
    return $this->getError( 'math_output_error' );
}
gerritbot added a comment.Sep 2 2016, 1:37 AM

Change 308117 had a related patch set uploaded (by Dereckson):
Set wgMathFileBackend to false for wikitech wikis

https://gerrit.wikimedia.org/r/308117

gerritbot added a comment.Sep 2 2016, 10:04 PM

Change 270146 abandoned by Dereckson:
Test file backend for Math on labtestwiki

Reason:
Superseded by local filestorage backend.

https://gerrit.wikimedia.org/r/270146

Dereckson moved this task from Blocked on SRE to To deploy on the Wikimedia-Site-requests board.Sep 2 2016, 10:04 PM
gerritbot added a comment.Sep 5 2016, 11:24 PM

Change 308117 merged by jenkins-bot:
Set wgMathFileBackend to false for wikitech wikis

https://gerrit.wikimedia.org/r/308117

Stashbot added a comment.Sep 5 2016, 11:27 PM

Mentioned in SAL [2016-09-05T23:27:01Z] <dereckson@tin> Synchronized wmf-config/InitialiseSettings.php: Set wgMathFileBackend to false for wikitech wikis (T126628) (duration: 00m 48s)

Dereckson closed this task as Resolved.Sep 5 2016, 11:31 PM
Dereckson claimed this task.

Extension now successfully write files to /srv/math-images.

gerritbot added a comment.Sep 5 2016, 11:42 PM

Change 308671 had a related patch set uploaded (by Dereckson):
Wikitech: Serve /srv/math-images as /w/images/math

https://gerrit.wikimedia.org/r/308671

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