Add 'constellation config instance-types'

cli/internal/cmd/config.go

@@ -14,6 +14,7 @@ func NewConfigCmd() *cobra.Command {
 
 	cmd.AddCommand(newConfigGenerateCmd())
 	cmd.AddCommand(newConfigFetchMeasurementsCmd())
+	cmd.AddCommand(NewConfigInstanceTypesCmd())
 
 	return cmd
 }

cli/internal/cmd/configgenerate.go

@@ -63,6 +63,8 @@ func configGenerate(cmd *cobra.Command, fileHandler file.Handler, provider cloud
 	}
 	cmd.Println("Config file written to", flags.file)
 	cmd.Println("Please fill in your CSP specific configuration before proceeding.")
+	cmd.Println("You can find the list of supported virtual machine types by executing:")
+	cmd.Println("\tconstellation config instance-types")
 	return nil
 }
 

cli/internal/cmd/configinstancetypes.go

@@ -0,0 +1,35 @@
+package cmd
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/edgelesssys/constellation/internal/config/instancetypes"
+	"github.com/spf13/cobra"
+)
+
+func NewConfigInstanceTypesCmd() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "instance-types",
+		Short: "Prints the supported instance types for all cloud providers",
+		Long:  "Prints the supported instance types for all cloud providers.",
+		Args:  cobra.ArbitraryArgs,
+		Run:   printSupportedInstanceTypes,
+	}
+
+	return cmd
+}
+
+func printSupportedInstanceTypes(cmd *cobra.Command, args []string) {
+	fmt.Printf(`Azure Confidential VM instance types:
+%v
+Azure Trusted Launch instance types:
+%v
+GCP instance types:
+%v
+`, formatInstanceTypes(instancetypes.AzureCVMInstanceTypes), formatInstanceTypes(instancetypes.AzureTrustedLaunchInstanceTypes), formatInstanceTypes(instancetypes.GCPInstanceTypes))
+}
+
+func formatInstanceTypes(types []string) string {
+	return "\t" + strings.Join(types, "\n\t")
+}