In T246507#5988291, @Krinkle wrote:

At T226044, it was planned to self-host with Phabricator. The the domain itself is to be rerouted at the DNS layer instead, and using WordPress, this means we need to preserve URL functionality by different means. Is there a plan for this in place? One option could be to import all its posts, taking care to use the same slugs, dates, and permalink structure.

In T226044#5381214, @Krinkle wrote:

In T226044#5381193, @BBlack wrote:

[..] apparently they're datestamped URIs beginning with /yyyy/mm/, examples being:

https://techblog.wikimedia.org/2010/05/29/xml-dumps-resumed/

so perhaps a blanket redirect from the new techblog's ^/20[01][0-9] to a copy of the same URI on blog.wikimedia.org would be sufficient?

Yes. The old blog was a WordPress instance with fairly standard "permalink" configuration for posts, using the format /{yyyy}/{mm}/{slug}, such as https://techblog.wikimedia.org/2009/07/02/power-outage-in-wikimedias-european-servers/.

There are also "archive" urls at /{yyyy}, /{yyyy}/, /{yyyy}/{mm}, and /{yyyy}/{mm}/, such as https://techblog.wikimedia.org/2009/07/.

This was moved to blog.wikimedia.org as-is, with as far as I know all arbitrary urls redirecting. The exception being the root / which redirects to the technology category instead. This means in theory posts published after the move could be accessed through this older domain as well, but.. this isn't an issue currently because this "new" blog is also "old" again (read-only as of 2018). So, if we capture anything from /2007/* to /2018/* we should be good. (See also T226044#5268590).