@sites alias missing in drush 9?

[misterkay]

I just upgraded a site to Drupal 8.4 with the latest Drush 9 beta release. It is a multisite configuration using symlinked subdirectories.

Running drush @sites updb results in [error] Site alias not found.

This alias was enabled by default in previous versions, is this no longer the case? Does it need additional configuration?

[greg-1-anderson]

Drush 9 no longer supports executing a single command on multiple sites with alias lists (@A,@b,@c) or @sites. Neither of those syntaxes are available in any context. You may still use drush sa @group to see all aliases in a group; that is the only context in which Drush recognizes alias lists.

[misterkay]

So executing a single command on multiple sites now requires separate commands per site?

[weitzman]

Correct. Just write a bash or drush script and loop over the sites. You can use parallel to run several at once.

[misterkay]

Thanks for the clarification @weitzman @greg-1-anderson

[leymannx]

@weitzman I can't find anything about parallel. Do you have an example for us?

[weitzman]

Mentioned at https://www.codeword.xyz/2015/09/02/three-ways-to-script-processes-in-parallel/

[leymannx]

Some other alternatives can be found on DA https://drupal.stackexchange.com/q/250688/15055

[sgurlt]

Ok, but why ? We are using this several times per day in several projects ?

[weitzman]

We simplified the alias system for the long term health and maintainability of the drush project. Some useful but niche features like this were removed, especially where easy workarounds are available.

[yonailo]

I don't know if it was "niche", but definetely it was very useful, it is a pity that it was removed.