/
linkerd_app.go
206 lines (159 loc) · 4.5 KB
/
linkerd_app.go
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// Copyright (c) arkade author(s) 2022. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
package apps
import (
"bufio"
"context"
"errors"
"fmt"
"log"
"os"
"path"
"github.com/alexellis/arkade/pkg/get"
"github.com/alexellis/arkade/pkg/k8s"
"github.com/alexellis/arkade/pkg"
"github.com/alexellis/arkade/pkg/config"
"github.com/alexellis/arkade/pkg/env"
execute "github.com/alexellis/go-execute/v2"
"github.com/spf13/cobra"
)
var linkerdVersion = "stable-2.13.0"
func MakeInstallLinkerd() *cobra.Command {
var linkerd = &cobra.Command{
Use: "linkerd",
Short: "Install linkerd",
Long: `Install linkerd the light-weight service mesh for Kubernetes.`,
Example: ` arkade install linkerd`,
SilenceUsage: true,
}
linkerd.Flags().StringP("version", "v", linkerdVersion, "Specify a version of linkerd")
linkerd.RunE = func(command *cobra.Command, args []string) error {
kubeConfigPath, _ := command.Flags().GetString("kubeconfig")
if err := config.SetKubeconfig(kubeConfigPath); err != nil {
return err
}
version, err := command.Flags().GetString("version")
if err != nil {
return err
}
if command.Flags().Changed("version") {
linkerdVersion = version
}
if len(version) == 0 {
return fmt.Errorf("you must give a value for the --version flag")
}
arch := k8s.GetNodeArchitecture()
fmt.Printf("Node architecture: %q\n", arch)
userPath, err := getUserPath()
if err != nil {
return err
}
arch, clientOS := env.GetClientArch()
fmt.Printf("Client: %q\n", clientOS)
log.Printf("User dir established as: %s\n", userPath)
err = downloadLinkerd(userPath, arch, clientOS, linkerdVersion)
if err != nil {
return err
}
fmt.Println("Running linkerd2 check, this may take a few moments.")
_, err = linkerdCli("check", "--pre")
if err != nil {
return err
}
res, err := linkerdCli("install")
if err != nil {
return err
}
file, err := os.CreateTemp("", "linkerd")
if err != nil {
return err
}
w := bufio.NewWriter(file)
_, err = w.WriteString(res.Stdout)
if err != nil {
return err
}
w.Flush()
err = k8s.Kubectl("apply", "-R", "-f", file.Name())
if err != nil {
return err
}
defer os.Remove(file.Name())
_, err = linkerdCli("check")
if err != nil {
return err
}
fmt.Println(`=======================================================================
= Linkerd has been installed. =
=======================================================================
# Find out more at:
# https://linkerd.io
# To use the linkerd2 CLI set this path:
export PATH=$PATH:` + path.Join(userPath, "bin/") + `
linkerd2 --help
` + pkg.SupportMessageShort)
return nil
}
return linkerd
}
// func getLinkerdURL(os, version string) string {
// osSuffix := strings.ToLower(os)
// return fmt.Sprintf("https://github.com/linkerd/linkerd2/releases/download/%s/linkerd2-cli-%s-%s", version, version, osSuffix)
// }
func downloadLinkerd(userPath, arch, clientOS, version string) error {
tools := get.MakeTools()
var tool *get.Tool
for _, t := range tools {
if t.Name == "linkerd2" {
tool = &t
break
}
}
if tool == nil {
return fmt.Errorf("unable to find tool definition")
}
if _, err := os.Stat(env.LocalBinary(tool.Name, "")); errors.Is(err, os.ErrNotExist) {
var (
progress bool
quiet bool
)
defaultMovePath := ""
outPath, finalName, err := get.Download(tool, arch, clientOS, version, defaultMovePath, progress, quiet)
if err != nil {
return err
}
fmt.Println("Downloaded to: ", outPath, finalName)
} else {
fmt.Printf("%s already exists, skipping download.\n", tool.Name)
}
return nil
}
func linkerdCli(parts ...string) (execute.ExecResult, error) {
task := execute.ExecTask{
Command: env.LocalBinary("linkerd2", ""),
Args: parts,
Env: os.Environ(),
StreamStdio: true,
}
res, err := task.Execute(context.Background())
if err != nil {
return res, err
}
if res.ExitCode != 0 {
return res, fmt.Errorf("exit code %d, stderr: %s", res.ExitCode, res.Stderr)
}
return res, nil
}
func getUserPath() (string, error) {
userPath, err := config.InitUserDir()
return userPath, err
}
func getExportPath() string {
userPath := config.GetUserDir()
return path.Join(userPath, "bin/")
}
var LinkerdInfoMsg = `# Find out more at:
# https://linkerd.io
# To use the linkerd2 CLI set this path:
export PATH=$PATH:` + getExportPath() + `
linkerd2 --help`