Cloud-announce June 2020

cloud-announce@lists.wikimedia.org

6 participants
6 discussions

Toolforge: new domain toolforge.org
by Arturo Borrero Gonzalez 07 Jul '20

07 Jul '20

Hi! We are happy to announce the new domain 'toolforge.org' is now ready to be adopted by our Toolforge community. There is a lot of information related to this change in a wikitech page we have for this: https://wikitech.wikimedia.org/wiki/News/Toolforge.org The most important change you will see happening is a new domain/scheme for Toolforge-hosted webservices: * from https://tools.wmflabs.org/<toolname>/ * to https://<toolname>.toolforge.org/ A live example of this change can be found in our internal openstack-browser webservice tool: * legacy URL: https://tools.wmflabs.org/openstack-browser/ * new URL: https://openstack-browser.toolforge.org This domain change is something we have been working on for months previous to this announcement. Part of our work has been to ensure we have a smooth transition from the old domain (and URL scheme) to the new canonical one. However, we acknowledge the ride might be bumpy for some folks, due to technical challenges or cases we didn't consider when planning this migration. Please reach out intermediately if you find any limitation or failure anywhere related to this change. The wikitech page also contains a section with information for common problems. You can check now if your webservice needs any specific change by creating a temporal redirection to the new canonical URL: $ webservice --canonical --backend=kubernetes start [..] $ webservice --canonical --backend=gridengine start [..] The --canonical switch will create a temporal redirect that you can turn on/off. Please use this to check how your webservice behaves with the new domain/URL scheme. If you start the webservice without --canonical, the temporal redirect will be removed. We aim to introduce permanent redirects for the legacy URLs on 2020-06-15. We expect to keep serving legacy URLs forever, by means of redirections to the new URLs. More information on the redirections can also be found in the wikitech page. The toolforge.org domain is finally here! <3 -- Arturo Borrero Gonzalez SRE / Wikimedia Cloud Services Wikimedia Foundation

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Toolforge email server now enforcing ratelimiting
by Arturo Borrero Gonzalez 24 Jun '20

24 Jun '20

Hi, we just enabled email ratelimiting in our MTA server [0] in Toolforge. Please, report any problem or issue you may find related to this. The current limit is 100 messages per hour per sender address. We may tune the value as we observe the behavior of the system and the users. regards. [0] https://en.wikipedia.org/wiki/Message_transfer_agent -- Arturo Borrero Gonzalez SRE / Wikimedia Cloud Services Wikimedia Foundation

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NFS maintenance tomorrow 2020-06-11
by Brooke Storm 11 Jun '20

11 Jun '20

Tomorrow (June 11th) at 1600 UTC, we will be failing over the primary NFS server to do maintenance and upgrades on it. The secondary partner in the cluster is already upgraded and ready, and recent changes *should* make it a fairly straightforward failover with a brief period of high load. If it doesn't proceed smoothly, it will be a slightly longer period of high load and NFS lockup as failover completes (10-20 min or so). After maintenance it will be failed back, which will also, hopefully, be quick and painless. -- Brooke Storm SRE Wikimedia Cloud Services bstorm(a)wikimedia.org IRC: bstorm_

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DNS updates next Tuesday 2020-06-09, 14:00-16:00 UTC
by Andrew Bogott 09 Jun '20

09 Jun '20

Hello! Next week we'll be rebuilding and upgrading the hardware that provides DNS service to cloud-vps and toolforge. These rebuilds will start at 14:00 UTC and the whole process may take 2-3 hours. It's likely that DNS lookups will be somewhat slower as clients fail over between the in-progress and the working server. In theory there should be few other user-facing effects from these upgrades. In practice, though, this isn't something that we've done for quite a while, and touching DNS is always risky since it underlies pretty much everything. Here are some things to be ready for: - As a precaution we'll be disabling Horizon during the window to prevent new VMs or DNS changes landing in an inconsistent state. - Some badly-behaved DNS clients won't fail over properly and will report errors when their primary DNS server is down. - Puppet will almost certainly experience transient failures, since Puppet is known to be one of those badly-behaved clients. - If things go very badly there may be periods of total DNS outage which will result in many WMCS-hosted services failing. There's no particular reason that this /should/ happen, but this is the worst-case scenario. For additional context, the phabricator task for this work is https://phabricator.wikimedia.org/T253780 - Andrew + the WMCS team

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[reminder] Pywikibot will end Python 2 support in July!
by Martin Urbanec 09 Jun '20

09 Jun '20

As the last release of Python 2 is finally out, the July release of Pywikibot is going to be the **last release that supports Python 2**. Support of Python 3.4 and MediaWiki older than 1.19 is also going to be dropped. After this release, Pywikibot is not going to receive any further patches and bug fixes related to those Python and MediaWiki versions. Functions and other stuff specific to Python 3.4, Python 2.x or MediaWiki older than 1.19 will be removed. For your convenience, this release is marked with a "python2" git tag and it is also the last 3.0.x release. In case you really need it, the Pywikibot team created /shared/pywikibot/core_python2 repository in Toolforge and a python2-pywikibot package in software repositories of some operating systems. The Pywikibot team strongly recommends that you migrate your scripts from Python 2 to Python 3. The migration steps were described in the previous message, which can be found here: https://lists.wikimedia.org/pipermail/pywikibot/2020-January/009976.html Detailed plan of Python 2 deprecation with dates is described here: https://www.mediawiki.org/wiki/Manual:Pywikibot/Compatibility If you encounter any problems with the migration, you can always ask us here: https://phabricator.wikimedia.org/T242120 Best regards, Pywikibot team

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[Cloud VPS] Puppet labs/private.git data loss incident affecting some projects
by Bryan Davis 04 Jun '20

04 Jun '20

At 2020-06-04T11:12 UTC a change was merged to the operations/puppet.git repository which resulted in data loss for Cloud VPS projects using a local Puppetmaster (role::puppetmaster::standalone). The specific data loss is removal of any local to the Puppetmaster instance commits overlaid on the upstream labs/private.git repository. These patches would have contained passwords, ssh keys, TLS certificates, and similar authentication information for Puppet managed configuration. The majority of Cloud VPS projects are not affected by this configuration data loss. Several highly used and visible projects, including Toolforge (tools) and Beta Cluster (deployment-prep), have some impact. We have disabled Puppet across all Cloud VPS instances that were reachable by our central command and control service (cumin) and are currently evaluating impact and recovering data from /var/logs/puppet.log change logs where available. More information will be collected at <https://phabricator.wikimedia.org/T254491> and an incident report will also be prepared once the initial response is complete. Bryan -- Bryan Davis Technical Engagement Wikimedia Foundation Principal Software Engineer Boise, ID USA [[m:User:BDavis_(WMF)]] irc: bd808

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Cloud-announce June 2020