Change directory that experiments data is saved to. Correct log messages

launcher/launcher/main.go

@@ -79,17 +79,21 @@ func main() {
 		return
 	}
 
-	experimentsFile := path.Join(launcherfile.HostTmpPath, experimentDataFile)
+	err = os.MkdirAll(launcherfile.HostExperimentsPath, os.ModePerm)
+	if err != nil {
+		logger.Printf("failure to create experiments directory: %v", err)
+	}
+	experimentsFile := path.Join(launcherfile.HostExperimentsPath, experimentDataFile)
 
 	args := fmt.Sprintf("-output=%s", experimentsFile)
 	err = exec.Command(binaryPath, args).Run()
 	if err != nil {
-		logger.Printf("failure during experiment sync: %v", err)
+		logger.Printf("failure during experiment sync: %v\n", err)
 	}
 
 	e, err := experiments.New(experimentsFile)
 	if err != nil {
-		logger.Printf("failed to read experiment file %v\n", err)
+		logger.Printf("failed to read experiment file: %v\n", err)
 		// do not fail if experiment retrieval fails
 	}
 	launchSpec.Experiments = e

launcher/launcherfile/launcherfile.go

@@ -5,6 +5,8 @@ package launcherfile
 const (
 	// HostTmpPath defined the directory in the host that will store attestation tokens
 	HostTmpPath = "/tmp/container_launcher/"
+	// HostExperimentsPath defines the directory in the host that will store experiment state.
+	HostExperimentsPath = "/tmp/experiments_data/"
 	// ContainerRuntimeMountPath defined the directory in the container stores attestation tokens
 	ContainerRuntimeMountPath = "/run/container_launcher/"
 	// AttestationVerifierTokenFilename defines the name of the file the attestation token is stored in.