Add health subcommand

main.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"github.com/duck8823/duci/application"
 	"github.com/duck8823/duci/application/semaphore"
+	"github.com/duck8823/duci/application/service/docker"
 	"github.com/duck8823/duci/infrastructure/logger"
 	"github.com/duck8823/duci/presentation/router"
 	"github.com/google/uuid"
@@ -29,8 +30,15 @@ func main() {
 	}
 	configCmd.PersistentFlags().StringVarP(&configPath, "config", "c", application.DefaultConfigurationPath, "configuration file path")
 
+	healthCmd := &cobra.Command{
+		Use:   "health",
+		Short: "Health check",
+		Run:   healthCmd,
+	}
+	healthCmd.PersistentFlags().StringVarP(&configPath, "config", "c", application.DefaultConfigurationPath, "configuration file path")
+
 	rootCmd := &cobra.Command{Use: "duci"}
-	rootCmd.AddCommand(serverCmd, configCmd)
+	rootCmd.AddCommand(serverCmd, configCmd, healthCmd)
 
 	if err := rootCmd.Execute(); err != nil {
 		logger.Errorf(uuid.New(), "Failed to execute command.\n%+v", err)
@@ -72,6 +80,24 @@ func configCmd(cmd *cobra.Command, _ []string) {
 	}
 }
 
+func healthCmd(cmd *cobra.Command, _ []string) {
+	readConfiguration(cmd)
+
+	dockerService, err := docker.New()
+	if err != nil {
+		logger.Errorf(uuid.New(), "Failed to set configuration.\n%+v", err)
+		os.Exit(1)
+	}
+
+	if err := dockerService.Status(); err != nil {
+		logger.Errorf(uuid.New(), "Unhealthy.\n%s", err)
+		os.Exit(1)
+	} else {
+		logger.Info(uuid.New(), "Healthy.")
+		os.Exit(0)
+	}
+}
+
 func readConfiguration(cmd *cobra.Command) {
 	configFilePath := cmd.Flag("config").Value.String()
 	if !exists(configFilePath) && configFilePath == application.DefaultConfigurationPath {