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istio.go
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istio.go
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package cluster
import (
"context"
"fmt"
"net/http"
"os"
"os/exec"
"path/filepath"
"runtime"
"github.com/rotisserie/eris"
glooruntime "github.com/solo-io/gloo/test/kubernetes/testutils/runtime"
"github.com/solo-io/gloo/test/testutils"
"github.com/solo-io/go-utils/contextutils"
)
func GetIstioctl(ctx context.Context) (string, error) {
// Download istioctl binary
istioctlBinary, err := downloadIstio(ctx, getIstioVersion())
if err != nil {
return "", fmt.Errorf("failed to download istio: %w", err)
}
contextutils.LoggerFrom(ctx).Infof("Using Istio binary '%s'", istioctlBinary)
return istioctlBinary, nil
}
func InstallMinimalIstio(
ctx context.Context,
istioctlBinary, kubeContext string,
) error {
return installIstioOperator(ctx, istioctlBinary, kubeContext, "")
}
// TODO(npolshak): Add additional Istio setup options as needed (versions, revisions, ambient, etc.)
func installIstioOperator(
ctx context.Context,
istioctlBinary, kubeContext, operatorFile string) error {
if testutils.ShouldSkipIstioInstall() {
return nil
}
var cmd *exec.Cmd
if operatorFile == "" {
// use the minimal profile by default if no operator file is provided
// yes | istioctl install --context <kube-context> --set profile=minimal
cmd = exec.Command("sh", "-c", "yes | "+istioctlBinary+" install --context "+kubeContext+" --set profile=minimal")
} else {
cmd = exec.Command("sh", "-c", "yes | "+istioctlBinary, "install", "-y", "--context", kubeContext, "-f", operatorFile)
}
if err := cmd.Run(); err != nil {
return fmt.Errorf("istioctl install failed: %w", err)
}
return ctx.Err()
}
func getIstioVersion() string {
if version := os.Getenv(glooruntime.IstioVersionEnv); version != "" {
return version
} else {
// Fail loudly if ISTIO_VERSION is not set
panic(fmt.Sprintf("%s environment variable must be specified to run", glooruntime.IstioVersionEnv))
}
}
// Download istioctl binary from istio.io/downloadIstio and returns the path to the binary
func downloadIstio(ctx context.Context, version string) (string, error) {
if version == "" {
contextutils.LoggerFrom(ctx).Infof("ISTIO_VERSION not specified, using istioctl from PATH")
binaryPath, err := exec.LookPath("istioctl")
if err != nil {
return "", eris.New("ISTIO_VERSION environment variable must be specified or istioctl must be installed")
}
contextutils.LoggerFrom(ctx).Infof("using istioctl path: %s", binaryPath)
return binaryPath, nil
}
installLocation := filepath.Join(testutils.GitRootDirectory(), ".bin")
binaryDir := filepath.Join(installLocation, fmt.Sprintf("istio-%s", version), "bin")
binaryLocation := filepath.Join(binaryDir, "istioctl")
fileInfo, _ := os.Stat(binaryLocation)
if fileInfo != nil {
return binaryLocation, nil
}
if err := os.MkdirAll(binaryDir, 0755); err != nil {
return "", eris.Wrap(err, "create directory")
}
if istioctlDownloadFrom := os.Getenv("ISTIOCTL_DOWNLOAD_FROM"); istioctlDownloadFrom != "" {
osName := "linux"
if runtime.GOOS == "darwin" {
osName = "osx"
}
arch := runtime.GOARCH
archModifier := fmt.Sprintf("-%s", arch)
if osName == "osx" && arch != "arm64" {
archModifier = ""
}
url := fmt.Sprintf("%s/%s/istioctl-%s-%s%s.tar.gz", istioctlDownloadFrom, version, version, osName, archModifier)
// Use curl and tar to download and extract the file
cmd := exec.Command("sh", "-c", fmt.Sprintf("curl -sSL %s | tar -xz -C %s", url, binaryDir))
if err := cmd.Run(); err != nil {
return "", eris.Wrapf(err, "download and extract istioctl, cmd: %s", cmd.Args)
}
// Change permissions
if err := os.Chmod(binaryLocation, 0755); err != nil {
return "", eris.Wrap(err, "change permissions")
}
return binaryLocation, nil
}
req, err := http.NewRequest(http.MethodGet, "https://istio.io/downloadIstio", nil)
if err != nil {
return "", err
}
res, err := http.DefaultClient.Do(req)
if err != nil {
return "", err
}
defer res.Body.Close()
cmd := exec.Command("sh", "-")
cmd.Env = append(cmd.Env, fmt.Sprintf("%s=%s", glooruntime.IstioVersionEnv, version))
cmd.Dir = installLocation
cmd.Stdin = res.Body
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
if err = cmd.Run(); err != nil {
return "", err
}
return binaryLocation, err
}
func UninstallIstio(istioctlBinary, kubeContext string) error {
// sh -c yes | istioctl uninstall —purge —context <kube-context>
cmd := exec.Command("sh", "-c", fmt.Sprintf("yes | %s uninstall --purge --context %s", istioctlBinary, kubeContext))
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
if err := cmd.Run(); err != nil {
return fmt.Errorf("istioctl uninstall failed: %w", err)
}
return nil
}
// CreateIstioBugReport generates an istioctl bug report and moves it to the _output directory
func CreateIstioBugReport(ctx context.Context, istioctlBinary, kubeContext, artifactOutputDir string) {
// Generate istioctl bug report
if istioctlBinary == "" {
contextutils.LoggerFrom(ctx).Panic("istioctl binary not set. Cannot generate istioctl bug report.")
}
bugReportCmd := exec.Command(istioctlBinary, "bug-report", "--full-secrets", "--context", kubeContext)
bugReportErr := bugReportCmd.Run()
if bugReportErr != nil {
fmt.Println("Error generating bug report:", bugReportErr)
}
mvCmd := exec.Command("mv", "bug-report.tar.gz", artifactOutputDir)
mvErr := mvCmd.Run()
if mvErr != nil {
fmt.Println("Error moving bug report file:", mvErr)
}
}