[AIR-137] Add isogen subcommand for bootstrap

This is just a frame for command that will execute docker container
with ISO builder scripts

Change-Id: I59a5c494785af3cbcffd3b9f6a488d93f73f4878

cmd/bootstrap/bootstrap.go

@@ -1,8 +1,6 @@
 package bootstrap
 
 import (
-	"fmt"
-
 	"github.com/spf13/cobra"
 
 	"opendev.org/airship/airshipctl/pkg/environment"
@@ -12,12 +10,11 @@ import (
 func NewBootstrapCommand(rootSettings *environment.AirshipCTLSettings) *cobra.Command {
 	bootstrapRootCmd := &cobra.Command{
 		Use:   "bootstrap",
-		Short: "bootstraps airshipctl",
-		Run: func(cmd *cobra.Command, args []string) {
-			out := cmd.OutOrStdout()
-			fmt.Fprintf(out, "Under construction\n")
-		},
+		Short: "Bootstrap ephemeral Kubernetes cluster",
 	}
 
+	ISOGenCmd := NewISOGenCommand(bootstrapRootCmd, rootSettings)
+	bootstrapRootCmd.AddCommand(ISOGenCmd)
+
 	return bootstrapRootCmd
 }

cmd/bootstrap/bootstrap_isogen.go

@@ -0,0 +1,24 @@
+package bootstrap
+
+import (
+	"github.com/spf13/cobra"
+
+	"opendev.org/airship/airshipctl/pkg/bootstrap/isogen"
+	"opendev.org/airship/airshipctl/pkg/environment"
+)
+
+// NewISOGenCommand creates a new command for ISO image creation
+func NewISOGenCommand(parent *cobra.Command, rootSettings *environment.AirshipCTLSettings) *cobra.Command {
+	settings := &isogen.Settings{AirshipCTLSettings: rootSettings}
+	imageGen := &cobra.Command{
+		Use:   "isogen",
+		Short: "Generate bootstrap ISO image",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return isogen.GenerateBootstrapIso(settings, args, cmd.OutOrStdout())
+		},
+	}
+
+	settings.InitFlags(imageGen)
+
+	return imageGen
+}

cmd/bootstrap/bootstrap_test.go

@@ -0,0 +1,26 @@
+package bootstrap_test
+
+import (
+	"testing"
+
+	"opendev.org/airship/airshipctl/cmd/bootstrap"
+	"opendev.org/airship/airshipctl/testutil"
+)
+
+func TestBootstrap(t *testing.T) {
+	tests := []*testutil.CmdTest{
+		{
+			Name:    "bootstrap-cmd-with-defaults",
+			CmdLine: "",
+			Cmd:     bootstrap.NewBootstrapCommand(nil),
+		},
+		{
+			Name:    "bootstrap-isogen-cmd-with-help",
+			CmdLine: "isogen --help",
+			Cmd:     bootstrap.NewBootstrapCommand(nil),
+		},
+	}
+	for _, tt := range tests {
+		testutil.RunTest(t, tt)
+	}
+}

cmd/bootstrap/testdata/TestBootstrapGoldenOutput/bootstrap-cmd-with-defaults.golden

@@ -0,0 +1,13 @@
+Bootstrap ephemeral Kubernetes cluster
+
+Usage:
+  bootstrap [command]
+
+Available Commands:
+  help        Help about any command
+  isogen      Generate bootstrap ISO image
+
+Flags:
+  -h, --help   help for bootstrap
+
+Use "bootstrap [command] --help" for more information about a command.

cmd/bootstrap/testdata/TestBootstrapGoldenOutput/bootstrap-isogen-cmd-with-help.golden

@@ -0,0 +1,8 @@
+Generate bootstrap ISO image
+
+Usage:
+  bootstrap isogen [flags]
+
+Flags:
+  -c, --config string   Configuration file path for ISO builder container.
+  -h, --help            help for isogen

cmd/testdata/TestRootGoldenOutput/rootCmd-with-defaults.golden

@@ -5,7 +5,7 @@ Usage:
 
 Available Commands:
   argo        argo is the command line interface to Argo
-  bootstrap   bootstraps airshipctl
+  bootstrap   Bootstrap ephemeral Kubernetes cluster
   completion  Generate autocompletions script for the specified shell (bash or zsh)
   help        Help about any command
   kubeadm     kubeadm: easily bootstrap a secure Kubernetes cluster

cmd/testdata/TestRootGoldenOutput/specialized-rootCmd-with-bootstrap.golden

@@ -4,7 +4,7 @@ Usage:
   airshipctl [command]
 
 Available Commands:
-  bootstrap   bootstraps airshipctl
+  bootstrap   Bootstrap ephemeral Kubernetes cluster
   help        Help about any command
   version     Show the version number of airshipctl
 

go.mod

@@ -110,6 +110,6 @@ require (
 	k8s.io/metrics v0.0.0-20190516231729-8b83d5daaa8f // indirect
 	k8s.io/utils v0.0.0-20190529001817-6999998975a7 // indirect
 	sigs.k8s.io/kustomize v2.0.3+incompatible // indirect
-	sigs.k8s.io/yaml v1.1.0 // indirect
+	sigs.k8s.io/yaml v1.1.0
 	vbom.ml/util v0.0.0-20180919145318-efcd4e0f9787 // indirect
 )

pkg/bootstrap/isogen/command.go

@@ -0,0 +1,28 @@
+package isogen
+
+import (
+	"errors"
+	"fmt"
+	"io"
+
+	"opendev.org/airship/airshipctl/pkg/util"
+)
+
+// ErrNotImplemented returned for not implemented features
+var ErrNotImplemented = errors.New("Error. Not implemented")
+
+// GenerateBootstrapIso will generate data for cloud init and start ISO builder container
+func GenerateBootstrapIso(settings *Settings, args []string, out io.Writer) error {
+	if settings.IsogenConfigFile == "" {
+		fmt.Fprintln(out, "Reading config file location from global settings is not supported")
+		return ErrNotImplemented
+	}
+
+	cfg := Config{}
+
+	if err := util.ReadYAMLFile(settings.IsogenConfigFile, &cfg); err != nil {
+		return err
+	}
+	fmt.Println("Under construction")
+	return nil
+}

pkg/bootstrap/isogen/config.go

@@ -0,0 +1,56 @@
+package isogen
+
+import (
+	"github.com/spf13/cobra"
+
+	"sigs.k8s.io/yaml"
+
+	"opendev.org/airship/airshipctl/pkg/environment"
+)
+
+// Settings settings for isogen command
+type Settings struct {
+	*environment.AirshipCTLSettings
+
+	// Configuration file (YAML-formatted) path for ISO builder container.
+	IsogenConfigFile string
+}
+
+// InitFlags adds falgs and their default settings for isogen command
+func (i *Settings) InitFlags(cmd *cobra.Command) {
+	flags := cmd.Flags()
+	flags.StringVarP(&i.IsogenConfigFile, "config", "c", "", "Configuration file path for ISO builder container.")
+}
+
+// Config ISO builder container configuration
+type Config struct {
+	// Configuration parameters for container
+	Container Container `json:"container,omitempty"`
+	// Configuration parameters for ISO builder
+	Builder Builder `json:"builder,omitempty"`
+}
+
+// Container parameters
+type Container struct {
+	// Container volume directory binding.
+	Volume string `json:"volume,omitempty"`
+	// ISO generator container image URL
+	Image string `json:"image,omitempty"`
+	// Container Runtime Interface driver
+	ContainerRuntime string `json:"containerRuntime,omitempty"`
+}
+
+// Builder parameters
+type Builder struct {
+	// Cloud Init user-data file name placed to the container volume root
+	UserDataFileName string `json:"userDataFileName,omitempty"`
+	// Cloud Init network-config file name placed to the container volume root
+	NetworkConfigFileName string `json:"networkConfigFileName,omitempty"`
+	// File name for output metadata
+	OutputMetadataFileName string `json:"outputMetadataFileName,omitempty"`
+}
+
+// ToYAML serializes confid to YAML
+func (c *Config) ToYAML() ([]byte, error) {
+	return yaml.Marshal(c)
+}

pkg/util/configreader.go

@@ -0,0 +1,17 @@
+package util
+
+import (
+	"io/ioutil"
+
+	"sigs.k8s.io/yaml"
+)
+
+// ReadYAMLFile reads YAML-formatted configuration file and
+// de-serializes it to a given object
+func ReadYAMLFile(filePath string, cfg interface{}) error {
+	data, err := ioutil.ReadFile(filePath)
+	if err != nil {
+		return err
+	}
+	return yaml.Unmarshal(data, cfg)
+}