Bring JsonLogger to CE

This backports a module that was in EE for Geo so that other modules
can have structured logging support.

1 files changed, 22 insertions, 0 deletions

diff --git a/lib/gitlab/json_logger.rb b/lib/gitlab/json_logger.rb
new file mode 100644
index 00000000000..28e258196ca
--- /dev/null
+++ b/lib/gitlab/json_logger.rb
@@ -0,0 +1,22 @@
+module Gitlab
+  class JsonLogger < ::Gitlab::Logger
+    def self.file_name_noext
+      raise NotImplementedError
+    end
+
+    def format_message(severity, timestamp, progname, message)
+      data = {}
+      data[:severity] = severity
+      data[:time] = timestamp.utc.iso8601(3)
+
+      case message
+      when String
+        data[:message] = message
+      when Hash
+        data.merge!(message)
+      end
+
+      data.to_json + "\n"
+    end
+  end
+end