Runtime logs (#1447)

* Runtime logs

* Slightly broken

* Pushing for diff

* Log trailing works locally

* LogsOptions

* Comments and streamcount support for local logs

* Adding kubernetes logs

* Fixing k8s logs

* K8s fixes

* StreamCount is now nuked

* PR comments

* PR comments again

* Fix typo

runtime/runtime.go

@@ -35,6 +35,19 @@ type Runtime interface {
 	Start() error
 	// Stop shuts down the runtime
 	Stop() error
+	// Logs
+	Logs(*Service, ...LogsOption) (LogStream, error)
+}
+
+// Stream returns a log stream
+type LogStream interface {
+	Chan() chan LogRecord
+	Stop() error
+}
+
+type LogRecord struct {
+	Message  string
+	Metadata map[string]string
 }
 
 // Scheduler is a runtime service scheduler