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/service/proto/runtime.proto

@@ -8,6 +8,7 @@ service Runtime {
 	rpc Delete(DeleteRequest) returns (DeleteResponse) {};
 	rpc Update(UpdateRequest) returns (UpdateResponse) {};
 	rpc List(ListRequest) returns (ListResponse) {};
+	rpc Logs(LogsRequest) returns (stream LogRecord) {};
 }
 
 message Service {
@@ -84,3 +85,26 @@ message ListRequest {}
 message ListResponse {
 	repeated Service services = 1;
 }
+
+message LogsRequest{
+	// service to request logs for
+	string service = 1;
+	// stream records continuously
+	bool stream = 2;
+	// count of records to request
+	int64 count = 3;
+	// relative time in seconds
+	// before the current time
+	// from which to show logs
+	int64 since = 4;
+}
+
+message LogRecord {
+	// timestamp of log record
+    int64 timestamp = 1;
+    // record metadata
+    map<string,string> metadata = 2;
+    // message
+    string message = 3;
+}
+