Merge pull request #19 from input-output-hk/hydra-concurrency

Update hydra eval/job concurrency and remove ci error

modules/hydra-master-main.nix

@@ -26,7 +26,7 @@ let
     hostName = "localhost";
     mandatoryFeatures = [ "local" ];
     systems = [ "x86_64-linux" "i686-linux" ];
-    maxJobs = 16;
+    maxJobs = 8;
   };
   mkGithubStatus = { jobset, inputs ? jobset }: ''
     <githubstatus>
@@ -83,7 +83,7 @@ in {
       evaluator_max_heap_size = ${toString (5 * 1024 * 1024 * 1024)}
       max_db_connections = 50
 
-      max_concurrent_evals = 14
+      max_concurrent_evals = 4
 
       store_uri = s3://iohk-nix-cache?secret-key=/etc/nix/hydra.iohk.io-1/secret&log-compression=br&region=eu-central-1
       server_store_uri = https://iohk-nix-cache.s3-eu-central-1.amazonaws.com/

release.nix

@@ -2,7 +2,7 @@ let
   sources = import ./nix/sources.nix;
   pkgs = import sources.nixpkgs {};
 in pkgs.lib.fix (self: {
-  ci = (import ./nix-darwin/test.nix { role = "ci"; host = "build"; port = "123"; hostname = "hostname"; }).system;
+  # ci = (import ./nix-darwin/test.nix { role = "ci"; host = "build"; port = "123"; hostname = "hostname"; }).system;
   buildkite-agent = (import ./nix-darwin/test.nix { role = "buildkite-agent"; host = "build"; port = "123"; hostname = "hostname"; }).system;
   hydra-slave = (import ./nix-darwin/test.nix { role = "hydra-slave"; host = "build"; port = "123"; hostname = "hostname"; }).system;
   signing = (import ./nix-darwin/test.nix { role = "signing"; host = "build"; port = "123"; hostname = "hostname"; }).system;
@@ -12,7 +12,7 @@ in pkgs.lib.fix (self: {
       # Re-add once upstream impure hercules fetcher is fixed:
       # error: access to URI 'https://github.com/hercules-ci/gitignore/archive/f9e996052b5af4032fe6150bba4a6fe4f7b9d698.tar.gz' is forbidden in restricted mode
       #ci
-      #hydra-slave
+      hydra-slave
       buildkite-agent
       signing
     ];