Cloud-announce February 2020

cloud-announce@lists.wikimedia.org

3 participants
7 discussions

Planned NFS maintenance 2020-02-26@1800 UTC
by Brooke Storm 27 Feb '20

27 Feb '20

On Wed 26-Feb, we are making a large change to how NFS is mounted in Cloud Services https://gerrit.wikimedia.org/r/c/operations/puppet/+/571821. This will impact any Cloud VPS projects that mount NFS for home directories, project directories and scratch, including Toolforge. During this change, NFS will become unresponsive for a short time. Some NFS clients will recover on their own with little impact. Where needed, WMCS will reboot or remount NFS clients. This change will improve future NFS management and hopefully reduce future disruptions from maintenance.

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[Toolforge] 2020 Kubernetes cluster automatic migration phase beginning
by Bryan Davis 21 Feb '20

21 Feb '20

Following a beta testing period [0] and a general use self-migration period [1], the Toolforge administration team is ready to begin the final phase of automatic migration of tools currently running on the legacy Kubernetes cluster to the 2020 Kubernetes cluster. The migration process will involve Toolforge administrators running `webservice migrate` for each tool in the same way that self-migration happens [2]. A small number of tools are using the legacy Kubernetes cluster outside of the `webservice` system. These tools will be moved using a more manual process after move all webservices. We are currently planning on doing these migrations in several batches so that we can monitor the load and capacity of the 2020 Kubernetes cluster as we move ~640 more tools over from the legacy cluster. Once the tools have all been moved to the 2020 cluster, we will continue with additional clean up and default configuration changes which will allow us to fully decommission the legacy cluster. We will also be updating various documentation on Wikitech during this final phase. We hope to complete this entire process by 2020-03-06 at the latest. [0]: https://lists.wikimedia.org/pipermail/cloud-announce/2020-January/000247.ht… [1]: https://lists.wikimedia.org/pipermail/cloud-announce/2020-January/000252.ht… [2]: https://wikitech.wikimedia.org/wiki/News/2020_Kubernetes_cluster_migration#… Bryan (on behalf of the Toolforge admins and the Cloud Services team) -- Bryan Davis Technical Engagement Wikimedia Foundation Principal Software Engineer Boise, ID USA [[m:User:BDavis_(WMF)]] irc: bd808

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VM reboots on Thursday
by Andrew Bogott 21 Feb '20

21 Feb '20

The barrage of hardware failures continues! Next week the eqiad staff will be repairing cloudvirt1014; to prepare I'll be draining it on this Thursday (2020-02-20), beginning around 15:00 UTC. Affected instances will be down for a few minutes and then rebooted. Toolforge users should be largely unaffected by this maintenance. Here is the list of affected VMs: traffic-cache-atsupload-buster canary1014-01 util-abogott-buster filippo-log-buster01 staging opusmt mw01 grantreview-04 cloud-puppetmaster-03 commtech-wikiwho toolsbeta-test-k8s-haproxy-2 debmonitor-pm toolsbeta-test-k8s-control-1 toolsbeta-test-k8s-etcd-2 toolsbeta-test-k8s-etcd-1 jmm-debm-01 xtools-dev05 ores-web-05 roebling ores-web-04 cloudinfra-db02 Krypton discovery-production-02 maps-tiles1 wikitextexp-base-1002 accounts-appserver4 tofawiki02 packagist-mirror1 deployment-elastic06 deployment-changeprop deployment-restbase02 deployment-imagescaler01 deployment-kafka-jumbo-1 deployment-memc07 deployment-eventlog05 deployment-cpjobqueue deployment-mediawiki-07 deployment-chromium01 deployment-cache-text05 whgi wikilabels gitservices wikilabels-02 af-puppetdb02 missing-sections ores-lb-03 matrix-synapse-01 captcha-tf-43 k4-2

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Brief interruption in grid engine cronjobs tomorrow
by Andrew Bogott 21 Feb '20

21 Feb '20

Tomorrow I need to relocate 'tools-sgecron-01,' the VM that is in charge of starting cron jobs on the grid. The host will be down for 5-10 minutes, during which time no cronjobs will start. I'm going to make the move around 16:00 UTC, although I'll wait until a few minutes after so that on-the-hour jobs still happen. -Andrew

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Keystone/Horizon sessions will be reset on Tuesday
by Andrew Bogott 17 Feb '20

17 Feb '20

On Tuesday morning I'm going to switch the OpenStack Keystone token engine from UUID tokens to fernet tokens[0]. The changeover[1] will be abrupt and cause all existing sessions to reset (e.g. if you're using Horizon you'll have to log back in, and if you're in the middle of creating a VM that creation will probably fail.) Should you encounter this interruption, just try again in a few minutes and everything should be fine. The new tokens will generally behave the same from a user standpoint, but will allow us to simplify and modernize things on our end a bit. The switch will happen at 15:00 UTC on this Tuesday, 2020-02-18. That's 7AM, Pacific Coast time. [0] https://docs.openstack.org/keystone/pike/admin/identity-fernet-token-faq.ht… [1] https://phabricator.wikimedia.org/T243418

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VM downtimes later today
by Andrew Bogott 14 Feb '20

14 Feb '20

In order to repair some ailing hardware, I'm going to migrate several cloud-vps instances later today. Each will be down for a few minutes (or longer, depending on disk size) and then rebooted. Toolforge users will be unaffected by this change. Affected VMs will be: vanadium cloudstore-client-2 cloudstore-client-1 cn-staging-2 wikispore-test wm-bot traffic-cache-atstext-buster etherpad traffic-cache-atsupload jbond-buster commons-corruption-checker-main codesearch6 canary1022-01 ores-web-06 cloud-cumin-01 petscan4 thanos-prom01 thanos-be01 extdist-04

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(very) Brief WMCS + wikitech outage Monday 2020-02-10, 15:00 UTC
by Andrew Bogott 04 Feb '20

04 Feb '20

On Monday we'll be restarting the database server that supports most WMCS services. During the restart various things will fail: Wikitech pages will fail to load, OpenStack API calls will fail, etc. In all cases if you encounter an issue you can just count to 20 and try again, by which time things will most likely be back up. Active VMs, tools and other things hosted on toolforge or cloud-VPS should be unaffected. The restart will happen at 15:00 UTC on Monday -- that's 7AM Pacific Time.

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Cloud-announce February 2020