mwdebug

The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.

MediaWiki on Kubernetes

As part of MediaWiki On Kubernetes, two mw-debug deployments exist (one in each datacenter). These deployments can be reached via the browser through the k8s-mwdebug option for WikimediaDebug (for the current datacenter), or k8s-mwdebug-eqiad or k8s-mwdebug-codfw in the rare case that you want a particular one.

Connecting

Bare metal

Bare metal mwdebug hosts are deprecated and will be decommissioned within 2025. Work for the aspect of experimental nature of those is happening in https://phabricator.wikimedia.org/T324003, other use cases should be already covered by the mw-on-k8s mwdebug environments.

mwdebug hosts are a small cluster of application servers set aside for use with WikimediaDebug.

The servers run on shared Ganeti hardware rather than baremetal and have a few additional packages installed to aid in debugging (such as php-tideways).

We currently have:

mwdebug1001.eqiad: Ad-hoc testing
mwdebug1002.eqiad: Stage during deployment for Eqiad.
mwdebug2001.codfw: Ad-hoc testing.
mwdebug2002.codfw: Stage during deployment for Codfw.

Connecting

Connect to mwdebug over ssh by proxying through a bastion (e.g. bast1003.wikimedia.org). As with other hosts, ensure you have ProxyJump configured in .ssh/config (see Production shell access). Then connect as follows:

user@laptop:~$ ssh mwdebug1002.eqiad.wmnet

Services

WikimediaDebug

History

mwdebug deployments of Mediawiki on Kubernetes were made available in 2021
Debug hosts were reimaged with buster in Feb 2021.
mwmdebug1003 was a WikimediaDebug host in Eqiad, used for testing Debian Buster for a while when most servers ran Stretch. It was later used for testing Stretch when most servers were Buster. It was deleted in 2020 per T267248.