No problem if anyone has any question feel free to email me, or ask in #wikimedia-tech on irc.freenode.net ( webchat.freenode.net ) - Zppix Volunteer Developer ENWIKI rollbacker & NPR ENWP.org/user:Zppix
Sent from my iPhone > On Apr 8, 2017, at 11:29 PM, Gerard Meijssen <[email protected]> > wrote: > > Hoi, > It is great news to understand the level of our ability to switch over. I > am impressed and yes, it can and will improve but this is good to hear and > understand. > Thanks, > GerardM > >> On 9 April 2017 at 03:39, zppix e <[email protected]> wrote: >> >> >> >> >>> From: Faidon Liambotis <[email protected]> >>> Date: April 7, 2017 at 8:58:09 AM CDT >>> To: Wikimedia developers <[email protected]> >>> Subject: [Wikitech-l] eqiad->codfw datacenter switchover, weeks of Apr >> 17th/May 1st >>> Reply-To: Wikimedia developers <[email protected]> >>> >>> Hi all, >>> >>> You may have heard already that, like last year, we are planning to >>> switch our active datacenter from eqiad to codfw in the week of April >>> 17th and back to eqiad two weeks later, on the week of May 1st. We do >>> this periodically in order to exercise our ability to run from the >>> backup site in case of a disaster, as well as our ability to switch >>> seamlessly to it with little user impact. >>> >>> Switching will be a gradual, multi-step process, the most visible step >>> of which will be the switch of MediaWiki application servers and >>> associated data stores. This will happen on April 19th (eqiad->codfw) >>> and May 3rd (codfw->eqiad), both at 14:00 UTC. During those windows, the >>> sites will be placed into read-only mode, for a period that we estimate >>> to last approximately 20 to 30 minutes. >>> >>> Furthermore, the deployment train will freeze for the weeks of April >>> 17th and May 1st[1], but operate normally on the week of April 24th, in >>> order to exercise our ability to deploy code while operating from the >>> backup datacenter. >>> >>> 1: https://wikitech.wikimedia.org/wiki/Deployments >>> >>> Compared to last year we have improved our processes considerably[2], in >>> particular by making more services operate in an active/active manner, >>> as well as by working on an automation and orchestration framework[3] to >>> perform parallel executions across the fleet. The core of the MediaWiki >>> switchover will be performed semi-automatically using a new software[4] >>> that will execute all the necessary commands in sequence with little >>> human involvement, and thus lowering the risk of introducing errors and >>> delays. >>> >>> 2: https://wikitech.wikimedia.org/wiki/Switch_Datacenter >>> 3: https://github.com/wikimedia/cumin >>> 4: https://github.com/wikimedia/operations-switchdc >>> >>> Improving and automating our processes means that we're not going to be >>> following the exact same steps as last year. Because of that, and >>> because of other changes introduced in our environment over the course >>> of the year, there is a possibility of errors creeping into the process. >>> We'll certainly try to fix any issues that arise during those weeks and >>> we'd like to ask everyone to be on high-alert and vigilant. >>> >>> To report any issues, please use one of the following channels: >>> >>> 1. File a Phabricator issue with project #codfw-rollout >>> 2. Report issues on IRC: Freenode channel #wikimedia-tech (if urgent, or >>> during the migration) >>> 3. Send an e-mail to the Operations list: [email protected] (any >> time) >>> >>> Thanks, >>> Faidon >>> -- >>> Faidon Liambotis >>> Principal Operations Engineer >>> Acting Director of Technical Operations >>> Wikimedia Foundation >>> >>> _______________________________________________ >>> Wikitech-l mailing list >>> [email protected] >>> https://lists.wikimedia.org/mailman/listinfo/wikitech-l >> _______________________________________________ >> Wikipedia-l mailing list >> [email protected] >> https://lists.wikimedia.org/mailman/listinfo/wikipedia-l >> > _______________________________________________ > Wikipedia-l mailing list > [email protected] > https://lists.wikimedia.org/mailman/listinfo/wikipedia-l _______________________________________________ Wikipedia-l mailing list [email protected] https://lists.wikimedia.org/mailman/listinfo/wikipedia-l
