Add license to server info (#343)

This allows health diagnostics to capture the information, alerting the 
customer when the license is nearing expiration.

Author: anjalshireesh

health.go

@@ -1050,6 +1050,7 @@ type ServerInfo struct {
 	GCStats        *GCStats          `json:"gc_stats,omitempty"`
 	MinioEnvVars   map[string]string `json:"minio_env_vars,omitempty"`
 	Edition        string            `json:"edition"`
+	License        *LicenseInfo      `json:"license,omitempty"`
 }
 
 // MinioInfo contains MinIO server and object storage information.

info-commands.go

@@ -417,6 +417,7 @@ type ServerProperties struct {
 	GCStats        *GCStats          `json:"gc_stats,omitempty"`
 	MinioEnvVars   map[string]string `json:"minio_env_vars,omitempty"`
 	Edition        string            `json:"edition"`
+	License        *LicenseInfo      `json:"license,omitempty"`
 }
 
 // MemStats is strip down version of runtime.MemStats containing memory stats of MinIO server.

info-commands_gen.go

@@ -26,7 +26,11 @@ import (
 	"time"
 )
 
+//msgp:clearomitted
+//msgp:tag json
+//go:generate msgp
 // LicenseInfo is a structure containing MinIO license information.
+
 type LicenseInfo struct {
 	ID           string    `json:"ID"`           // The license ID
 	Organization string    `json:"Organization"` // Name of the organization using the license