[ Feature ] Add support for GCP secrets manager (#535)

* Added support for GCP secrets manager
* Published relevant public docs with the instructions on how to use this feature

command/secrets/generate/params.go

@@ -1,7 +1,6 @@
 package generate
 
 import (
-	"errors"
 	"fmt"
 	"strings"
 
@@ -24,13 +23,15 @@ const (
 )
 
 const (
-	defaultNodeName       = "polygon-edge-node"
+	defaultNodeName       = ""
 	defaultConfigFileName = "./secretsManagerConfig.json"
 	defaultNamespace      = "admin"
 )
 
 var (
-	errUnsupportedType = errors.New("unsupported service manager type")
+	errUnsupportedType = fmt.Errorf(
+		"unsupported service manager type; only %s, %s, %s and %s are supported for now",
+		secrets.Local, secrets.HashicorpVault, secrets.AWSSSM, secrets.GCPSSM)
 )
 
 type generateParams struct {

command/secrets/generate/secrets_generate.go

@@ -2,6 +2,7 @@ package generate
 
 import (
 	"fmt"
+
 	"github.com/0xPolygon/polygon-edge/command"
 	"github.com/spf13/cobra"
 
@@ -11,7 +12,7 @@ import (
 func GetCommand() *cobra.Command {
 	secretsGenerateCmd := &cobra.Command{
 		Use:   "generate",
-		Short: "Initializes the secrets manager configuration in the provided directory. Used for Hashicorp Vault",
+		Short: "Initializes the secrets manager configuration in the provided directory.",
 		Run:   runCommand,
 	}
 
@@ -26,10 +27,7 @@ func setFlags(cmd *cobra.Command) {
 		&params.dir,
 		dirFlag,
 		defaultConfigFileName,
-		fmt.Sprintf(
-			"the directory for the secrets manager configuration file Default: %s",
-			defaultConfigFileName,
-		),
+		"the directory for the secrets manager configuration file",
 	)
 
 	cmd.Flags().StringVar(
@@ -51,29 +49,25 @@ func setFlags(cmd *cobra.Command) {
 		typeFlag,
 		string(secrets.HashicorpVault),
 		fmt.Sprintf(
-			"the type of the secrets manager. Default: %s",
+			"the type of the secrets manager. Available types: %s, %s and %s",
 			secrets.HashicorpVault,
+			secrets.AWSSSM,
+			secrets.GCPSSM,
 		),
 	)
 
 	cmd.Flags().StringVar(
 		&params.name,
 		nameFlag,
 		defaultNodeName,
-		fmt.Sprintf(
-			"the name of the node for on-service record keeping. Default: %s",
-			defaultNodeName,
-		),
+		"the name of the node for on-service record keeping",
 	)
 
 	cmd.Flags().StringVar(
 		&params.namespace,
 		namespaceFlag,
 		defaultNamespace,
-		fmt.Sprintf(
-			"the namespace for the service. Default %s",
-			defaultNamespace,
-		),
+		"the namespace for the service",
 	)
 
 	cmd.Flags().StringVar(

command/secrets/init/params.go

@@ -93,6 +93,13 @@ func (ip *initParams) initFromConfig() error {
 		}
 
 		secretsManager = AWSSSM
+	case secrets.GCPSSM:
+		GCPSSM, err := helper.SetupGCPSSM(ip.secretsConfig)
+		if err != nil {
+			return err
+		}
+
+		secretsManager = GCPSSM
 	default:
 		return errUnsupportedType
 	}

go.mod

@@ -41,6 +41,8 @@ require (
 )
 
 require (
+	cloud.google.com/go v0.100.2 // indirect
+	cloud.google.com/go/secretmanager v1.4.0
 	github.com/armon/go-metrics v0.3.10 // indirect
 	github.com/aws/aws-sdk-go v1.44.14
 	github.com/benbjohnson/clock v1.3.0 // indirect
@@ -53,9 +55,8 @@ require (
 	github.com/mitchellh/mapstructure v1.4.3 // indirect
 	github.com/valyala/fastjson v1.6.3 // indirect
 	go.uber.org/zap v1.20.0 // indirect
-	golang.org/x/sys v0.0.0-20220227234510-4e6760a101f9 // indirect
 	golang.org/x/tools v0.1.9 // indirect
-	google.golang.org/genproto v0.0.0-20211208223120-3a66f561d7aa // indirect
+	google.golang.org/genproto v0.0.0-20220505152158-f39f71e6c8f3
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
 	lukechampine.com/blake3 v1.1.7 // indirect
 )