code.dlang.org downtime

[Sönke Ludwig]

As you may have already noticed, the main registry server, 
code.dlang.org got unreachable yesterday. This was caused by an old VPS 
of mine getting terminated. The registry had already moved to a 
different server years ago, but, without me realizing it, the DNS entry 
still pointed to the old one, with a "temporary" HTTP proxy forwarding 
to the new server being set up.

By now the DNS entry has been corrected, an up-to-date TLS certificate 
is in place, and the registry is running stable. There are still reports 
of people not being able to access code.dlang.org, which is apparently 
caused by intermediate DNS servers still reporting the old IP address 
and should start working during the next few hours. A temporary 
workaround is to specify --registry=http://31.15.67.41/ on the dub 
command line.

Unfortunately both fallback servers have been down for a while now, so 
that this resulted in a total blackout. I plan to move the main registry 
to a powerful dedicated server in January, which will fix all memory 
resource related issues that sometimes show up, and could then keep the 
current VPS as a relatively reliable fallback server. Both together 
should guarantee virtually 100% uptime, although more fallback servers 
are of course highly desirable.

In addition to that, I plan to separate the repository polling process 
form the web and REST frontend, as the former appears to be the main 
cause for failures (a GC memory leak of some kind and a possibly codegen 
related crash when being compiled with DMD being the two known issues, 
which both need further investigation).