kubeadm-doc-preflight

cmd/kubeadm/app/cmd/cmd.go

@@ -40,7 +40,7 @@ func NewKubeadmCommand(_ io.Reader, out, err io.Writer) *cobra.Command {
 			kubeadm: easily bootstrap a secure Kubernetes cluster.
 
 			    ┌──────────────────────────────────────────────────────────┐
-			    │ KUBEADM IS BETA, DO NOT USE IT FOR PRODUCTION CLUSTERS!  │
+			    │ KUBEADM IS CURRENTLY IN BETA                             │
 			    │                                                          │
 			    │ But please, try it out and give us feedback at:          │
 			    │ https://github.com/kubernetes/kubeadm/issues             │

cmd/kubeadm/app/cmd/init.go

@@ -218,7 +218,7 @@ func AddInitOtherFlags(flagSet *flag.FlagSet, cfgPath *string, skipPreFlight, sk
 // NewInit validates given arguments and instantiates Init struct with provided information.
 func NewInit(cfgPath string, cfg *kubeadmapi.MasterConfiguration, skipPreFlight, skipTokenPrint, dryRun bool, criSocket string) (*Init, error) {
 
-	fmt.Println("[kubeadm] WARNING: kubeadm is in beta. Please do not use it for production clusters!")
+	fmt.Println("[kubeadm] WARNING: kubeadm is currently in beta")
 
 	if cfgPath != "" {
 		b, err := ioutil.ReadFile(cfgPath)

cmd/kubeadm/app/cmd/join.go

@@ -176,7 +176,7 @@ type Join struct {
 
 // NewJoin instantiates Join struct with given arguments
 func NewJoin(cfgPath string, args []string, cfg *kubeadmapi.NodeConfiguration, skipPreFlight bool, criSocket string) (*Join, error) {
-	fmt.Println("[kubeadm] WARNING: kubeadm is in beta. Please do not use it for production clusters!")
+	fmt.Println("[kubeadm] WARNING: kubeadm is currently in beta")
 
 	if cfg.NodeName == "" {
 		cfg.NodeName = nodeutil.GetHostname("")

cmd/kubeadm/app/cmd/phases/BUILD

@@ -47,6 +47,7 @@ go_library(
         "//cmd/kubeadm/app/util/config:go_default_library",
         "//cmd/kubeadm/app/util/kubeconfig:go_default_library",
         "//pkg/api/legacyscheme:go_default_library",
+        "//pkg/util/normalizer:go_default_library",
         "//vendor/github.com/spf13/cobra:go_default_library",
         "//vendor/k8s.io/client-go/kubernetes:go_default_library",
         "//vendor/k8s.io/utils/exec:go_default_library",

cmd/kubeadm/app/cmd/phases/preflight.go

@@ -22,15 +22,37 @@ import (
 	kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
 	cmdutil "k8s.io/kubernetes/cmd/kubeadm/app/cmd/util"
 	"k8s.io/kubernetes/cmd/kubeadm/app/preflight"
+	kubeadmutil "k8s.io/kubernetes/cmd/kubeadm/app/util"
+	"k8s.io/kubernetes/pkg/util/normalizer"
 	utilsexec "k8s.io/utils/exec"
 )
 
+var (
+	masterPreflightLongDesc = normalizer.LongDesc(`
+		Run master pre-flight checks, functionally equivalent to what implemented by kubeadm init.
+		` + cmdutil.AlphaDisclaimer)
+
+	masterPreflightExample = normalizer.Examples(`
+		# Run master pre-flight checks.
+		kubeadm alpha phase preflight master
+		`)
+
+	nodePreflightLongDesc = normalizer.LongDesc(`
+		Run node pre-flight checks, functionally equivalent to what implemented by kubeadm join.
+		` + cmdutil.AlphaDisclaimer)
+
+	nodePreflightExample = normalizer.Examples(`
+		# Run node pre-flight checks.
+		kubeadm alpha phase preflight node
+	`)
+)
+
 // NewCmdPreFlight calls cobra.Command for preflight checks
 func NewCmdPreFlight() *cobra.Command {
 	cmd := &cobra.Command{
 		Use:   "preflight",
 		Short: "Run pre-flight checks",
-		RunE:  cmdutil.SubCmdRunE("preflight"),
+		Long:  cmdutil.MacroCommandLongDescription,
 	}
 
 	cmd.AddCommand(NewCmdPreFlightMaster())
@@ -41,12 +63,15 @@ func NewCmdPreFlight() *cobra.Command {
 // NewCmdPreFlightMaster calls cobra.Command for master preflight checks
 func NewCmdPreFlightMaster() *cobra.Command {
 	cmd := &cobra.Command{
-		Use:   "master",
-		Short: "Run master pre-flight checks.",
-		RunE: func(cmd *cobra.Command, args []string) error {
+		Use:     "master",
+		Short:   "Run master pre-flight checks",
+		Long:    masterPreflightLongDesc,
+		Example: masterPreflightExample,
+		Run: func(cmd *cobra.Command, args []string) {
 			cfg := &kubeadmapi.MasterConfiguration{}
 			criSocket := ""
-			return preflight.RunInitMasterChecks(utilsexec.New(), cfg, criSocket)
+			err := preflight.RunInitMasterChecks(utilsexec.New(), cfg, criSocket)
+			kubeadmutil.CheckErr(err)
 		},
 	}
 
@@ -56,12 +81,15 @@ func NewCmdPreFlightMaster() *cobra.Command {
 // NewCmdPreFlightNode calls cobra.Command for node preflight checks
 func NewCmdPreFlightNode() *cobra.Command {
 	cmd := &cobra.Command{
-		Use:   "node",
-		Short: "Run node pre-flight checks.",
-		RunE: func(cmd *cobra.Command, args []string) error {
+		Use:     "node",
+		Short:   "Run node pre-flight checks",
+		Long:    nodePreflightLongDesc,
+		Example: nodePreflightExample,
+		Run: func(cmd *cobra.Command, args []string) {
 			cfg := &kubeadmapi.NodeConfiguration{}
 			criSocket := ""
-			return preflight.RunJoinNodeChecks(utilsexec.New(), cfg, criSocket)
+			err := preflight.RunJoinNodeChecks(utilsexec.New(), cfg, criSocket)
+			kubeadmutil.CheckErr(err)
 		},
 	}
 

cmd/kubeadm/app/cmd/util/BUILD

@@ -2,10 +2,16 @@ load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
 
 go_library(
     name = "go_default_library",
-    srcs = ["cmdutil.go"],
+    srcs = [
+        "cmdutil.go",
+        "documentation.go",
+    ],
     importpath = "k8s.io/kubernetes/cmd/kubeadm/app/cmd/util",
     visibility = ["//visibility:public"],
-    deps = ["//vendor/github.com/spf13/cobra:go_default_library"],
+    deps = [
+        "//pkg/util/normalizer:go_default_library",
+        "//vendor/github.com/spf13/cobra:go_default_library",
+    ],
 )
 
 go_test(

cmd/kubeadm/app/cmd/util/cmdutil.go

@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-package phases
+package util
 
 import (
 	"fmt"

cmd/kubeadm/app/cmd/util/cmdutil_test.go

@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-package phases
+package util
 
 import (
 	"testing"

cmd/kubeadm/app/cmd/util/documentation.go

@@ -0,0 +1,33 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package util
+
+import (
+	"k8s.io/kubernetes/pkg/util/normalizer"
+)
+
+var (
+	// AlphaDisclaimer to be places at the end of description of commands in alpha release
+	AlphaDisclaimer = `
+		Alpha Disclaimer: this command is currently alpha but, please try it out and give us feedback!
+	`
+
+	// MacroCommandLongDescription provide a standard description for "macro" commands
+	MacroCommandLongDescription = normalizer.LongDesc(`
+		This command is not meant to be run on its own. See list of available subcommands.
+	`)
+)

cmd/kubeadm/app/kubeadm.go

@@ -28,6 +28,7 @@ import (
 // Run creates and executes new kubeadm command
 func Run() error {
 	// We do not want these flags to show up in --help
+	pflag.CommandLine.MarkHidden("version")
 	pflag.CommandLine.MarkHidden("google-json-key")
 	pflag.CommandLine.MarkHidden("log-flush-frequency")