Add docker-registry app

Adds a docker registry, which can be used through port-forwarding
and an Ingress record / TLS cert.

As per:

https://github.com/alexellis/k8s-tls-registry

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

cmd/app.go

@@ -63,6 +63,7 @@ command.`,
 	install.AddCommand(apps.MakeInstallIstio())
 	install.AddCommand(apps.MakeInstallCrossplane())
 	install.AddCommand(apps.MakeInstallMongoDB())
+	install.AddCommand(apps.MakeInstallRegistry())
 
 	command.AddCommand(MakeInfo())
 

cmd/apps/registry_app.go

@@ -0,0 +1,181 @@
+package apps
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"path"
+
+	"golang.org/x/crypto/bcrypt"
+
+	"github.com/alexellis/k3sup/pkg"
+	"github.com/alexellis/k3sup/pkg/config"
+	"github.com/alexellis/k3sup/pkg/env"
+	"github.com/alexellis/k3sup/pkg/helm"
+	"github.com/sethvargo/go-password/password"
+	"github.com/spf13/cobra"
+)
+
+func MakeInstallRegistry() *cobra.Command {
+	var registry = &cobra.Command{
+		Use:          "docker-registry",
+		Short:        "Install a Docker registry",
+		Long:         `Install a Docker registry`,
+		Example:      `  k3sup app install registry --namespace default`,
+		SilenceUsage: true,
+	}
+
+	registry.Flags().StringP("namespace", "n", "default", "The namespace used for installation")
+	registry.Flags().Bool("update-repo", true, "Update the helm repo")
+	registry.Flags().Bool("helm3", true, "Use helm3, if set to false uses helm2")
+	registry.Flags().StringP("username", "u", "admin", "Username for the registry")
+	registry.Flags().StringP("password", "p", "", "Password for the registry, leave blank to generate")
+
+	registry.RunE = func(command *cobra.Command, args []string) error {
+		kubeConfigPath := getDefaultKubeconfig()
+
+		if command.Flags().Changed("kubeconfig") {
+			kubeConfigPath, _ = command.Flags().GetString("kubeconfig")
+		}
+
+		updateRepo, _ := registry.Flags().GetBool("update-repo")
+
+		fmt.Printf("Using kubeconfig: %s\n", kubeConfigPath)
+		helm3, _ := command.Flags().GetBool("helm3")
+
+		if helm3 {
+			fmt.Println("Using helm3")
+		}
+
+		userPath, err := config.InitUserDir()
+		if err != nil {
+			return err
+		}
+		namespace, _ := command.Flags().GetString("namespace")
+		if namespace != "default" {
+			return fmt.Errorf(`to override the "default", install via tiller`)
+		}
+
+		clientArch, clientOS := env.GetClientArch()
+
+		fmt.Printf("Client: %s, %s\n", clientArch, clientOS)
+		log.Printf("User dir established as: %s\n", userPath)
+
+		os.Setenv("HELM_HOME", path.Join(userPath, ".helm"))
+
+		_, err = helm.TryDownloadHelm(userPath, clientArch, clientOS, helm3)
+		if err != nil {
+			return err
+		}
+
+		username, _ := command.Flags().GetString("username")
+
+		pass, _ := command.Flags().GetString("password")
+		if len(pass) == 0 {
+			key, err := password.Generate(20, 10, 0, false, true)
+			if err != nil {
+				return err
+			}
+
+			pass = key
+		}
+
+		val, err := bcrypt.GenerateFromPassword([]byte(pass), bcrypt.DefaultCost)
+
+		if err != nil {
+			return err
+		}
+
+		htPasswd := fmt.Sprintf("%s:%s\n", username, string(val))
+
+		err = addHelmRepo("stable", "https://kubernetes-charts.storage.googleapis.com", helm3)
+		if err != nil {
+			return err
+		}
+
+		if updateRepo {
+			err = updateHelmRepos(helm3)
+			if err != nil {
+				return err
+			}
+		}
+
+		chartPath := path.Join(os.TempDir(), "charts")
+		err = fetchChart(chartPath, "stable/docker-registry", helm3)
+
+		if err != nil {
+			return err
+		}
+
+		overrides := map[string]string{}
+
+		overrides["persistence.enabled"] = "false"
+		overrides["secrets.htpasswd"] = string(htPasswd)
+
+		arch := getNodeArchitecture()
+		fmt.Printf("Node architecture: %q\n", arch)
+
+		fmt.Println("Chart path: ", chartPath)
+
+		wait := false
+		ns := "default"
+
+		if helm3 {
+			outputPath := path.Join(chartPath, "docker-registry")
+
+			err := helm3Upgrade(outputPath, "stable/docker-registry", ns,
+				"values.yaml",
+				overrides, wait)
+
+			if err != nil {
+				return err
+			}
+		} else {
+			outputPath := path.Join(chartPath, "docker-registry/rendered")
+
+			err = templateChart(chartPath,
+				"docker-registry",
+				ns,
+				outputPath,
+				"values.yaml",
+				overrides)
+
+			if err != nil {
+				return err
+			}
+
+			err = kubectl("apply", "-R", "-f", outputPath)
+
+			if err != nil {
+				return err
+			}
+		}
+
+		fmt.Println(registryIngressInstallMsg)
+		fmt.Printf("Registry credentials: %s %s\nexport PASSWORD=%s\n", username, pass, pass)
+
+		return nil
+	}
+
+	return registry
+}
+
+const registryIngressInfoMsg = `# Your docker-registry has been configured
+
+kubectl logs deploy/docker-registry
+
+export IP="192.168.0.11" # Set to WiFI/ethernet adapter
+export PASSWORD="" # See below
+kubectl port-forward svc/docker-registry --address 0.0.0.0 5000 &
+
+docker login $IP:5000 --username admin --password $PASSWORD
+docker tag alpine:3.11 $IP:5000/alpine:3.11
+docker push $IP:5000/alpine:3.11
+
+# Find out more at:
+# https://github.com/helm/charts/tree/master/stable/registry`
+
+const registryIngressInstallMsg = `=======================================================================
+= docker-registry has been installed.                                 =
+=======================================================================` +
+	"\n\n" + registryIngressInfoMsg + "\n\n" + pkg.ThanksForUsing

go.mod

@@ -3,6 +3,7 @@ module github.com/alexellis/k3sup
 go 1.12
 
 require (
+	github.com/GehirnInc/crypt v0.0.0-20190301055215-6c0105aabd46
 	github.com/alexellis/go-execute v0.0.0-20191207085904-961405ea7544
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/morikuni/aec v1.0.0

go.sum

@@ -1,4 +1,6 @@
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/GehirnInc/crypt v0.0.0-20190301055215-6c0105aabd46 h1:rs0kDBt2zF4/CM9rO5/iH+U22jnTygPlqWgX55Ufcxg=
+github.com/GehirnInc/crypt v0.0.0-20190301055215-6c0105aabd46/go.mod h1:kC29dT1vFpj7py2OvG1khBdQpo3kInWP+6QipLbdngo=
 github.com/alexellis/go-execute v0.0.0-20191207085904-961405ea7544 h1:KjtKgzxk/0wfp7vZxWUYPMiEJKep7FJ7C7o/vtHyc/Q=
 github.com/alexellis/go-execute v0.0.0-20191207085904-961405ea7544/go.mod h1:zfRbgnPVxXCSpiKrg1CE72hNUWInqxExiaz2D9ppTts=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=