/
istio_app.go
254 lines (203 loc) · 6.72 KB
/
istio_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"
"github.com/alexellis/arkade/pkg"
"github.com/alexellis/arkade/pkg/config"
"github.com/alexellis/arkade/pkg/env"
"github.com/alexellis/arkade/pkg/get"
"github.com/alexellis/arkade/pkg/k8s"
execute "github.com/alexellis/go-execute/v2"
"github.com/spf13/cobra"
)
const (
// A default Istio version, get the latest from:
// https://github.com/istio/istio/releases/latest
istioVer = "1.16.1"
)
func MakeInstallIstio() *cobra.Command {
var istio = &cobra.Command{
Use: "istio",
Short: "Install istio",
Long: `Install istio`,
Example: ` arkade install istio --loadbalancer`,
SilenceUsage: true,
}
istio.Flags().StringP("version", "v", istioVer, "Specify a version of Istio")
istio.Flags().String("namespace", "default", "Namespace for the app")
istio.Flags().String("istio-namespace", "istio-system", "Namespace for the app")
istio.Flags().String("profile", "default", "Set istio profile")
istio.Flags().String("cpu", "100m", "Allocate CPU resource")
istio.Flags().String("memory", "100Mi", "Allocate Memory resource")
istio.Flags().StringArray("set", []string{},
"Use custom flags or override existing flags \n(example --set prometheus.enabled=false)")
istio.PreRunE = func(command *cobra.Command, args []string) error {
_, err := command.Flags().GetString("version")
if err != nil {
return fmt.Errorf("error with --version usage: %s", err)
}
_, err = command.Flags().GetString("namespace")
if err != nil {
return fmt.Errorf("error with --namespace usage: %s", err)
}
_, err = command.Flags().GetString("istio-namespace")
if err != nil {
return fmt.Errorf("error with --istio-namespace usage: %s", err)
}
_, err = command.Flags().GetString("profile")
if err != nil {
return fmt.Errorf("error with --profile usage: %s", err)
}
_, err = command.Flags().GetString("cpu")
if err != nil {
return fmt.Errorf("error with --cpu usage: %s", err)
}
_, err = command.Flags().GetString("memory")
if err != nil {
return fmt.Errorf("error with --memory usage: %s", err)
}
_, err = command.Flags().GetString("kubeconfig")
if err != nil {
return fmt.Errorf("error with --kubeconfig usage: %s", err)
}
_, err = command.Flags().GetStringArray("set")
if err != nil {
return fmt.Errorf("error with --set usage: %s", err)
}
return nil
}
istio.RunE = func(command *cobra.Command, args []string) error {
version, _ := command.Flags().GetString("version")
kubeConfigPath, _ := command.Flags().GetString("kubeconfig")
namespace, _ := command.Flags().GetString("namespace")
istioNamespace, _ := command.Flags().GetString("istio-namespace")
profile, _ := command.Flags().GetString("profile")
cpu, _ := command.Flags().GetString("cpu")
memory, _ := command.Flags().GetString("memory")
setOverrides, _ := command.Flags().GetStringArray("set")
arch := k8s.GetNodeArchitecture()
fmt.Printf("Node architecture: %q\n", arch)
if suffix := getValuesSuffix(arch); suffix == "-armhf" {
return fmt.Errorf(`istio is currently not supported on armhf architectures`)
}
userPath, err := config.InitUserDir()
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 = downloadIstio(userPath, arch, clientOS, version)
if err != nil {
return err
}
fmt.Println("Running istio check, this may take a few moments.")
defaultFlags := []string{"--namespace", namespace, "--istioNamespace", istioNamespace}
if len(kubeConfigPath) > 0 {
defaultFlags = append(defaultFlags, "--kubeconfig", kubeConfigPath)
}
preCheckFlags := mergeFlagsSlices([]string{"experimental", "precheck"}, defaultFlags)
_, err = istioCli(preCheckFlags...)
if err != nil {
return err
}
// set installation flags
installFlags := mergeFlagsSlices([]string{"install", "--skip-confirmation",
"--set", fmt.Sprintf("values.pilot.resources.requests.cpu=%s", cpu),
"--set", fmt.Sprintf("values.pilot.resources.requests.memory=%s", memory),
"--set", fmt.Sprintf("profile=%s", profile)}, defaultFlags, fmtSetFlags(setOverrides))
res, err := istioCli(installFlags...)
if err != nil {
return err
}
file, err := os.CreateTemp("", "istio")
if err != nil {
return err
}
w := bufio.NewWriter(file)
_, err = w.WriteString(res.Stdout)
if err != nil {
return err
}
w.Flush()
defer os.Remove(file.Name())
verifyFlags := mergeFlagsSlices([]string{"verify-install"}, defaultFlags)
_, err = istioCli(verifyFlags...)
if err != nil {
return err
}
fmt.Println(istioPostInstallMsg)
return nil
}
return istio
}
const IstioInfoMsg = `# Find out more at:
# https://github.com/istio/`
const istioPostInstallMsg = `=======================================================================
= Istio has been installed. =
=======================================================================` +
"\n\n" + IstioInfoMsg + "\n\n" + pkg.SupportMessageShort
func downloadIstio(userPath, arch, clientOS, version string) error {
tools := get.MakeTools()
var tool *get.Tool
for _, t := range tools {
if t.Name == "istioctl" {
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 istioCli(parts ...string) (execute.ExecResult, error) {
task := execute.ExecTask{
Command: env.LocalBinary("istioctl", ""),
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 fmtSetFlags(setOverrides []string) []string {
fmtOverrides := []string{}
for _, setOverride := range setOverrides {
fmtOverrides = append(fmtOverrides, "--set", setOverride)
}
return fmtOverrides
}
func mergeFlagsSlices(args ...[]string) []string {
mergedSlice := make([]string, 0)
for _, oneSlice := range args {
mergedSlice = append(mergedSlice, oneSlice...)
}
return mergedSlice
}