This change allows the number of sidekiq processes and which job classes
they handle to be configured.
An instance admin may choose to have separate sidekiq processes handling
jobs related to local users (`default` job class) and jobs related to
federation (`push`, `pull`, `ingress`), so that as the instance grows
and takes on more federation traffic, the local users' experience is not
as impacted.
For more details, see https://docs.joinmastodon.org/admin/scaling/#sidekiq
This pr also includes the following changes suggested in review:
- adds syslog identifiers for mastodon services
- moves working directory config to common cfgService
- adds mastodon.target
conversions were done using https://github.com/pennae/nix-doc-munge
using (probably) rev f34e145 running
nix-doc-munge nixos/**/*.nix
nix-doc-munge --import nixos/**/*.nix
the tool ensures that only changes that could affect the generated
manual *but don't* are committed, other changes require manual review
and are discarded.
this renders the same in the manpage and a little more clearly in the
html manual. in the manpage there continues to be no distinction from
regular text, the html manual gets code-type markup (which was probably
the intention for most of these uses anyway).
markdown can't represent the difference without another extension and
both the html manual and the manpage render them the same, so keeping the
distinction is not very useful on its own. with the distinction removed
we can automatically convert many options that use <code> tags to markdown.
the manpage remains unchanged, html manual does not render
differently (but class names on code tags do change from "code" to "literal").
the conversion procedure is simple:
- find all things that look like options, ie calls to either `mkOption`
or `lib.mkOption` that take an attrset. remember the attrset as the
option
- for all options, find a `description` attribute who's value is not a
call to `mdDoc` or `lib.mdDoc`
- textually convert the entire value of the attribute to MD with a few
simple regexes (the set from mdize-module.sh)
- if the change produced a change in the manual output, discard
- if the change kept the manual unchanged, add some text to the
description to make sure we've actually found an option. if the
manual changes this time, keep the converted description
this procedure converts 80% of nixos options to markdown. around 2000
options remain to be inspected, but most of those fail the "does not
change the manual output check": currently the MD conversion process
does not faithfully convert docbook tags like <code> and <package>, so
any option using such tags will not be converted at all.
The `services.mastodon` module currently hardcodes sidekiq's concurrency
to 25, but doesn't set a DB pool size, which defaults to 5 or the number
of configured web threads.
(This behaviour is very strange, and arguably a mastodon bug.)
This also makes sidekiq's concurrency configurable, because 25 is a tad
high for the hardware I'm running it on.
4255954d97 set the StateDirectory to 0750,
but nginx wasn't in the Mastodon group. This commit also deletes a line,
that probably was intended to serve this purpose, but makes no sense.
Why should the Mastodon user be added as an extraGroup to the nginx
user?
