Create a basic helm chart to test MediaWiki on kubernetes
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	Joe
	Oct 13 2020, 7:49 AM

Description

Independently of how we're going to distribute the php code in production (see the discussion at T265183), we will need to create at first at least a basic helm chart for running MediaWiki on kubernetes.

This chart will need to install:

a Deployment comprising envoy, apache, php-fpm, mcrouter, the corresponding exporters
a nutcracker daemonset
(possibly) a memcached daemonset

We should try to get something ready as soon as possible, and test performance of e.g. using unix sockets for communicating between apache, mcrouter and php-fpm, and various configuration options.

This chart will need to allow multiple (as in - not just main/canary) releases.

Details

	Subject	Repo	Branch	Lines +/-
	Helm chart to run MediaWiki	operations/deployment-charts	master	+1 K -0

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Related Objects
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Status	Assigned	Task
Resolved	Joe	T265327 Create a basic helm chart to test MediaWiki on kubernetes
Resolved	Joe	T272305 Create a yaml structure for defining apache virtualhosts for mediawiki, that can be used both in puppet and in helm charts.
Resolved	Joe	T276097 Create MediaWiki httpd base image
Resolved	Joe	T276908 Figure out appropriate readiness and liveness probes

Event Timeline

Joe triaged this task as High priority.Oct 13 2020, 7:49 AM

Joe created this task.

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptOct 13 2020, 7:49 AM

Joe closed subtask T272305: Create a yaml structure for defining apache virtualhosts for mediawiki, that can be used both in puppet and in helm charts. as Resolved.Feb 18 2021, 12:59 PM

Joe claimed this task.Mar 2 2021, 9:53 AM

Joe moved this task from Backlog to In Progress on the MW-on-K8s board.

Joe added a subtask: T276097: Create MediaWiki httpd base image.

JMeybohm subscribed.Mar 2 2021, 10:00 AM

Mentioned in SAL (#wikimedia-operations) [2021-03-08T09:55:11Z] <_joe_> uploading new versions of docker images: php7.{2,3}-{cli,fpm}, httpd, httpd-fcgi, mediawiki-httpd, memcached T276097 T265327

Change 670220 had a related patch set uploaded (by Giuseppe Lavagetto; owner: Giuseppe Lavagetto):
[operations/deployment-charts@master] [WiP] Helm chart to run MediaWiki

https://gerrit.wikimedia.org/r/670220

gerritbot added a project: Patch-For-Review.Mar 9 2021, 3:58 PM

JMeybohm added a subtask: T277711: Memcached, mcrouter in MediaWiki on Kubernetes.Mar 22 2021, 9:49 AM

dancy subscribed.Mar 22 2021, 3:01 PM

RhinosF1 subscribed.Mar 22 2021, 4:10 PM

joe@wotan:~/Sandbox/mw-on-k8s$ kubectl get pods
NAME                              READY   STATUS    RESTARTS   AGE
mediawiki-test-6fb67b5f8b-2nwqh   6/6     Running   5          3m44s

The chart now works with mcrouter and all metrics exporters, I didn't really check nutcracker still, but we're almost in the status where we can deploy a first version of the service in staging.

Joe closed subtask T276097: Create MediaWiki httpd base image as Resolved.Apr 14 2021, 3:39 PM

Krinkle subscribed.Apr 18 2021, 10:34 PM

Joe closed subtask T276908: Figure out appropriate readiness and liveness probes as Resolved.Apr 19 2021, 9:36 AM

Change 670220 merged by jenkins-bot:

[operations/deployment-charts@master] Helm chart to run MediaWiki

https://gerrit.wikimedia.org/r/670220

Maintenance_bot removed a project: Patch-For-Review.May 18 2021, 7:10 AM

Joe closed this task as Resolved.May 18 2021, 7:41 AM

jijiki removed a subtask: T277711: Memcached, mcrouter in MediaWiki on Kubernetes.Thu, Apr 11, 12:39 PM