Service mesh configuration to allow PCS to connect to liftwing
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	Jgiannelos
	Jul 3 2026, 11:20 AM

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Description

One of the upcoming features of apps requires access to liftwing.
Currently we don't have a service mesh connection configured that allows connection between PCS and liftwing.

What would be the next steps to achieve that?

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Related Changes in Gerrit:

Subject	Author	Repo	Branch	Lines +/-
mobileapps: Define request template for linked artifacts endpoint	Jgiannelos	operations/deployment-charts	master	+9 -1
linked-artifacts: Use /healthz handler in blackbox probes	Scott French	operations/puppet	production	+1 -0
linked-artifacts: service::catalog to production	Clément Goubert	operations/puppet	production	+1 -1
mobileapps: Add linked-artifacts mesh listener	Clément Goubert	operations/deployment-charts	master	+9 -0
linked-artifacts: Add service catalog and mesh entries	Clément Goubert	operations/puppet	production	+19 -0

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Status	Assigned	Task
Open	None	T427425 [Epic] Apps Year in Review 2026 (V4)
Resolved	Dbrant	T429634 [Android] Implement Topics for articles in reading history for Year in Review
Resolved	Clement_Goubert	T431108 Service mesh configuration to allow PCS to connect to liftwing

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Jgiannelos created this task.Jul 3 2026, 11:20 AM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptJul 3 2026, 11:20 AM

@Dbrant the service we want is liftwing, right? Can you provide some example request?

Jgiannelos added a project: ServiceOps.Jul 3 2026, 11:22 AM

(ServiceOps triage here.) We did something similar in T422804 to provide access to recommendation-api-ng and T427902 for liftwing-api-server. We just need a little more information about what service you want to reach.

In T431108#12085309, @Jgiannelos wrote:

@Dbrant the service we want is liftwing, right? Can you provide some example request?

I believe so; More details about the service url are here:
https://phabricator.wikimedia.org/T392833#11987986

And here is an example request:
curl https://linked-artifacts.discovery.wmnet:30443/revisions/v1/article_topics/enwiki/534366/1358198637

...where the parameters in the path are .../[wiki]/[pageid]/[revisionid]

In T431108#12094536, @Dbrant wrote:

In T431108#12085309, @Jgiannelos wrote:

@Dbrant the service we want is liftwing, right? Can you provide some example request?

I believe so; More details about the service url are here:
https://phabricator.wikimedia.org/T392833#11987986

And here is an example request:
curl https://linked-artifacts.discovery.wmnet:30443/revisions/v1/article_topics/enwiki/534366/1358198637

...where the parameters in the path are .../[wiki]/[pageid]/[revisionid]

So it's actually reaching out to linked-artifacts and not directly to liftwing?

Seddon added a parent task: T429634: [Android] Implement Topics for articles in reading history for Year in Review.Jul 7 2026, 4:45 PM

Scott_French added a project: ServiceOps-Services-Oids.Jul 8 2026, 12:41 AM

Scott_French subscribed.

It is indeed the linked-artifacts cache (or LAC). Example requests can be found in https://phabricator.wikimedia.org/T392833#11987986 and more documentation is available on the LAC wikitech page.
The clients (PCS in this case) makes requests to LAC and LAC makes the requests to LiftWing whenever there is a cache miss

Change #1308605 had a related patch set uploaded (by Clément Goubert; author: Clément Goubert):

[operations/puppet@production] linked-artifacts: service::catalog to production

https://gerrit.wikimedia.org/r/1308605

Change #1308604 had a related patch set uploaded (by Clément Goubert; author: Clément Goubert):

[operations/puppet@production] linked-artifacts: Add service catalog and mesh entries

https://gerrit.wikimedia.org/r/1308604

Change #1308609 had a related patch set uploaded (by Clément Goubert; author: Clément Goubert):

[operations/deployment-charts@master] mobileapps: Add linked-artifacts mesh listener

https://gerrit.wikimedia.org/r/1308609

Change #1308604 merged by Clément Goubert:

[operations/puppet@production] linked-artifacts: Add service catalog and mesh entries

https://gerrit.wikimedia.org/r/1308604

Change #1308609 merged by jenkins-bot:

[operations/deployment-charts@master] mobileapps: Add linked-artifacts mesh listener

https://gerrit.wikimedia.org/r/1308609

Change #1308605 merged by Clément Goubert:

[operations/puppet@production] linked-artifacts: service::catalog to production

https://gerrit.wikimedia.org/r/1308605

You should now be able to reach linked-artifacts through the service mesh, using http://localhost:6074 as a base URL, so curl https://localhost:6074/revisions/v1/article_topics/enwiki/534366/1358198637

Feel free to reopen if you encounter any issue.

Maintenance_bot removed a project: Patch-For-Review.Jul 9 2026, 1:31 PM

Change #1309712 had a related patch set uploaded (by Scott French; author: Scott French):

[operations/puppet@production] linked-artifacts: Use /healthz handler in blackbox probes

https://gerrit.wikimedia.org/r/1309712

gerritbot added a project: Patch-For-Review.Jul 10 2026, 6:59 PM

Change #1309712 merged by Scott French:

[operations/puppet@production] linked-artifacts: Use /healthz handler in blackbox probes

https://gerrit.wikimedia.org/r/1309712

Maintenance_bot removed a project: Patch-For-Review.Jul 13 2026, 5:32 PM

Change #1320156 had a related patch set uploaded (by Jgiannelos; author: Jgiannelos):

[operations/deployment-charts@master] mobileapps: Define request template for linked artifacts endpoint

https://gerrit.wikimedia.org/r/1320156

gerritbot added a project: Patch-For-Review.Aug 3 2026, 1:13 PM

Change #1320156 merged by jenkins-bot: