elk: 6.2.4 -> 6.3.2

* The ELK stack is upgraded to 6.3.2.

* `elasticsearch6`, `logstash6` and `kibana6` now come with X-Pack which is
  a suite of additional features. These are however licensed under the unfree
  "Elastic License".

* Fortunately they also provide OSS versions which are now packaged
  under: `elasticsearch6-oss`, `logstash6-oss` and `kibana6-oss`.
  Note that the naming of the attributes is consistent with upstream.

* The test `nix-build nixos/tests/elk.nix -A ELK-6` will test the OSS
  version by default. You can also run the test on the unfree ELK using:
  `NIXPKGS_ALLOW_UNFREE=1 nix-build nixos/tests/elk.nix -A ELK-6 --arg enableUnfree true`

1 files changed, 13 insertions, 6 deletions

diff --git a/nixos/tests/elk.nix b/nixos/tests/elk.nix
index 8dba7a905fa6..4c5c441ca265 100644
--- a/nixos/tests/elk.nix
+++ b/nixos/tests/elk.nix
@@ -1,4 +1,4 @@
-{ system ? builtins.currentSystem }:
+{ system ? builtins.currentSystem, enableUnfree ? false }:
 with import ../lib/testing.nix { inherit system; };
 with pkgs.lib;
 let
@@ -99,9 +99,16 @@ in mapAttrs mkElkTest {
     logstash      = pkgs.logstash5;
     kibana        = pkgs.kibana5;
   };
-  "ELK-6" = {
-    elasticsearch = pkgs.elasticsearch6;
-    logstash      = pkgs.logstash6;
-    kibana        = pkgs.kibana6;
-  };
+  "ELK-6" =
+    if enableUnfree
+    then {
+      elasticsearch = pkgs.elasticsearch6;
+      logstash      = pkgs.logstash6;
+      kibana        = pkgs.kibana6;
+    }
+    else {
+      elasticsearch = pkgs.elasticsearch6-oss;
+      logstash      = pkgs.logstash6-oss;
+      kibana        = pkgs.kibana6-oss;
+    };
 }