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Concurrent hydra-evaluator

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This rewrites the top-level loop of hydra-evaluator in C++. The Perl
stuff is moved into hydra-eval-jobset. (Rewriting the entire evaluator
would be nice but is a bit too much work.) The new version has some
advantages:

* It can run multiple jobset evaluations in parallel.

* It uses PostgreSQL notifications so it doesn't have to poll the
  database. So if a jobset is triggered via the web interface or from
  a GitHub / Bitbucket webhook, evaluation of the jobset will start
  almost instantaneously (assuming the evaluator is not at its
  concurrency limit).

* It imposes a timeout on evaluations. So if e.g. hydra-eval-jobset
  hangs connecting to a Mercurial server, it will eventually be
  killed.
This commit is contained in:
Eelco Dolstra
2016-10-13 15:53:05 +02:00
parent 16feddd5d4
commit e0b2921ff2
15 changed files with 325 additions and 55 deletions
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6
release.nix
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@ -58,8 +58,8 @@ rec {
src = fetchFromGitHub {
owner = "NixOS";
repo = "nix";
rev = "edf9eb8181e01f6b2123e5690019cfeeb44fc1c2";
sha256 = "1a00q9pypfziyi9hxl4rsammhwj7991wm4b1z9zcgl7zqksr3582";
rev = "5e61b422c58baac26b232233d39f5814cc35d52a";
sha256 = "0awic5zwibgpj5shpgjf2364imp2f84c8xi5r0x4p351q4kpg9z4";
};
buildInputs = attrs.buildInputs ++ [ autoreconfHook bison flex ];
nativeBuildInputs = attrs.nativeBuildInputs ++ [ aws-sdk-cpp' autoconf-archive ];
@ -124,6 +124,8 @@ rec {
src = if shell then null else hydraSrc;
stdenv = overrideCC stdenv gcc6;
buildInputs =
[ makeWrapper autoconf automake libtool unzip nukeReferences pkgconfig sqlite libpqxx
gitAndTools.topGit mercurial darcs subversion bazaar openssl bzip2 libxslt