It seems that SASL SCRAM in ejabberd now requires TLS to work, even if
disable_sasl_scram_downgrade_protection is true. The certificate
generation code is copied from nixos/tests/prosody.
The tests TLS setup was bogus: the xmpp-send-message script was trying
to connect to the server through a bogus domain name. Injecting the
right one.
I'm a bit confused about that one. I know for sure this NixOS test
succeeded last time I checked it, but the TLS conf is bogus for sure.
I assume the slixmpp SNI validation was a bit too loose and was
tightened at some point.
The xmpp-sendmessage the slixmpp-powered python script tend to timeout
and block the nixos channels.
Adding a signal-based timeout making sure that whatever happens, the
script won't run for more than 2 minutes. That should be pleinty
enough time to finish regardless of the runner specs. As a data point,
it runs in about 10 secs on my desktop machine.
The test has been broken for some time and the test errors are
non-obvious. None of the current maintainers know how to fix it so it is
better to get rid of it then to keep a continously failing test.
The test certificate expiration date was set to the default 30 days.
This certificate is generated through its own derivation. As with
every derivation, it gets cached by cache.nixos.org once we build it.
In practice, we rebuild this derivation only if one of its input
changes. The only inputs here being openssl and stdenv.
While it's not an issue on the unstable branches, it can be
problematic on a stable release: the test will fail after 30 days.
Extending the certificate lifespan from 1 month to 100 years to prevent
it from getting expired while being cached.
See
https://github.com/NixOS/nixpkgs/pull/132898#issuecomment-894495057
for more context.
This commit fixes the ejabberd tests for hydra:
mod_http_upload and mod_disco need to be explicitly enabled, and a
handler needs to be setup to make it work. Also, the client needs to be
able to contact the server.
The commit also fixes the situation where http upload failed: in that
case the client would wait forever because nothing catched the error.
Finally, there remains a non-reproducible error where ejabberd server
fails to start with an error like:
format: "Failed to create cookie file '/var/lib/ejabberd/.erlang.cookie': eacces"
(happens ~15%) I tried to check existence of /var/lib/ejabberd/ in
pre-start script and saw nothing that would explain this error, so I
gave up about this error in particular.
Setting up a XMPP chat server is a pretty deep rabbit whole to jump in
when you're not familiar with this whole universe. Your experience
with this environment will greatly depends on whether or not your
server implements the right set of XEPs.
To tackle this problem, the XMPP community came with the idea of
creating a meta-XEP in charge of listing the desirable XEPs to comply
with. This meta-XMP is issued every year under an new XEP number. The
2020 one being XEP-0423[1].
This prosody nixos module refactoring makes complying with XEP-0423
easier. All the necessary extensions are enabled by default. For some
extensions (MUC and HTTP_UPLOAD), we need some input from the user and
cannot provide a sensible default nixpkgs-wide. For those, we guide
the user using a couple of assertions explaining the remaining manual
steps to perform.
We took advantage of this substential refactoring to refresh the
associated nixos test.
Changelog:
- Update the prosody package to provide the necessary community
modules in order to comply with XEP-0423. This is a tradeoff, as
depending on their configuration, the user might end up not using them
and wasting some disk space. That being said, adding those will
allow the XEP-0423 users, which I expect to be the majority of
users, to leverage a bit more the binary cache.
- Add a muc submodule populated with the prosody muc defaults.
- Add a http_upload submodule in charge of setting up a basic http
server handling the user uploads. This submodule is in is
spinning up an HTTP(s) server in charge of receiving and serving the
user's attachments.
- Advertise both the MUCs and the http_upload endpoints using mod disco.
- Use the slixmpp library in place of the now defunct sleekxmpp for
the prosody NixOS test.
- Update the nixos test to setup and test the MUC and http upload
features.
- Add a couple of assertions triggered if the setup is not xep-0423
compliant.
[1] https://xmpp.org/extensions/xep-0423.html
