test/e2e/framework/pod/exec_util.go - master - githubmirror/kubernetes

test/e2e/framework/pod/exec_util.go
170 строк6 KB
Maciej Szulik
Replace remote executor code with the DefaultExecutor from kubectl
11 май 2026, 17:59
11 май 2026, 17:5961e5542
/*
Copyright 2016 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 pod

import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"io"
	"strings"

	"github.com/onsi/gomega"

	v1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/client-go/kubernetes/scheme"
	clientexec "k8s.io/client-go/util/exec"
	"k8s.io/kubectl/pkg/cmd/exec"
	"k8s.io/kubernetes/test/e2e/framework"
	"k8s.io/kubernetes/test/utils/client-go/ktesting"
)

// ExecOptions controls how [Exec] runs a command inside a pod container.
// At minimum, Command, Namespace, and PodName must be set.
type ExecOptions struct {
	Command       []string
	Namespace     string
	PodName       string
	ContainerName string
	Stdin         io.Reader
	CaptureStdout bool
	CaptureStderr bool
	// If false, whitespace in std{err,out} will be removed.
	PreserveWhitespace bool
	Quiet              bool
}

// Exec executes a command in the specified container,
// returning stdout, stderr and error. `options` allowed for
// additional parameters to be passed.
func Exec(tCtx ktesting.TContext, options ExecOptions) (string, string, error) {
	if !options.Quiet {
		tCtx.Logf("Exec %+v", options)
	}

	const tty = false
	tCtx.Logf("Exec: Clientset creation")
	req := tCtx.Client().CoreV1().RESTClient().Post().
		Resource("pods").
		Name(options.PodName).
		Namespace(options.Namespace).
		SubResource("exec")
	req.VersionedParams(&v1.PodExecOptions{
		Container: options.ContainerName,
		Command:   options.Command,
		Stdin:     options.Stdin != nil,
		Stdout:    options.CaptureStdout,
		Stderr:    options.CaptureStderr,
		TTY:       tty,
	}, scheme.ParameterCodec)

	var stdout, stderr bytes.Buffer
	tCtx.Logf("Exec: execute(%s)", req.URL())
	executor := exec.DefaultRemoteExecutor{}
	err := executor.ExecuteWithContext(tCtx, req.URL(), tCtx.RESTConfig(), options.Stdin, &stdout, &stderr, tty, nil)

	if options.PreserveWhitespace {
		return stdout.String(), stderr.String(), err
	}
	return strings.TrimSpace(stdout.String()), strings.TrimSpace(stderr.String()), err
}

// ExecCommandInContainerWithFullOutput executes a command in the
// specified container and return stdout, stderr and error
func ExecCommandInContainerWithFullOutput(f *framework.Framework, podName, containerName string, cmd ...string) (string, string, error) {
	// TODO (pohly): add context support
	return Exec(f.TContext(context.Background()), ExecOptions{
		Command:            cmd,
		Namespace:          f.Namespace.Name,
		PodName:            podName,
		ContainerName:      containerName,
		Stdin:              nil,
		CaptureStdout:      true,
		CaptureStderr:      true,
		PreserveWhitespace: false,
	})
}

// ExecCommandInContainer executes a command in the specified container.
func ExecCommandInContainer(f *framework.Framework, podName, containerName string, cmd ...string) string {
	stdout, stderr, err := ExecCommandInContainerWithFullOutput(f, podName, containerName, cmd...)
	framework.Logf("Exec stderr: %q", stderr)
	framework.ExpectNoError(err,
		"failed to execute command in pod %v, container %v: %v",
		podName, containerName, err)
	return stdout
}

// ExecShellInContainer executes the specified command on the pod's container.
func ExecShellInContainer(f *framework.Framework, podName, containerName string, cmd string) string {
	return ExecCommandInContainer(f, podName, containerName, "/bin/sh", "-c", cmd)
}

// ExecShellInPod executes the specified command on the pod.
func ExecShellInPod(ctx context.Context, f *framework.Framework, podName string, cmd string) string {
	pod, err := NewPodClient(f).Get(ctx, podName, metav1.GetOptions{})
	framework.ExpectNoError(err, "failed to get pod %v", podName)
	gomega.Expect(pod.Spec.Containers).NotTo(gomega.BeEmpty())
	return ExecCommandInContainer(f, podName, pod.Spec.Containers[0].Name, "/bin/sh", "-c", cmd)
}

// ExecShellInPodWithFullOutput executes the specified command on the Pod and returns stdout, stderr and error.
func ExecShellInPodWithFullOutput(ctx context.Context, f *framework.Framework, podName string, cmd string) (string, string, error) {
	pod, err := NewPodClient(f).Get(ctx, podName, metav1.GetOptions{})
	framework.ExpectNoError(err, "failed to get pod %v", podName)
	gomega.Expect(pod.Spec.Containers).NotTo(gomega.BeEmpty())
	return ExecCommandInContainerWithFullOutput(f, podName, pod.Spec.Containers[0].Name, "/bin/sh", "-c", cmd)
}

// VerifyExecInPodSucceed verifies shell cmd in target pod succeed
func VerifyExecInPodSucceed(ctx context.Context, f *framework.Framework, pod *v1.Pod, shExec string) error {
	stdout, stderr, err := ExecShellInPodWithFullOutput(ctx, f, pod.Name, shExec)
	if err != nil {
		var exitError clientexec.CodeExitError
		if errors.As(err, &exitError) {
			exitCode := exitError.ExitStatus()
			return fmt.Errorf("%q should succeed, but failed with exit code %d and error message %w\nstdout: %s\nstderr: %s",
				shExec, exitCode, exitError, stdout, stderr)
		} else {
			return fmt.Errorf("%q should succeed, but failed with error message %w\nstdout: %s\nstderr: %s",
				shExec, err, stdout, stderr)
		}
	}
	return nil
}

// VerifyExecInPodFail verifies shell cmd in target pod fail with certain exit code
func VerifyExecInPodFail(ctx context.Context, f *framework.Framework, pod *v1.Pod, shExec string, exitCode int) error {
	stdout, stderr, err := ExecShellInPodWithFullOutput(ctx, f, pod.Name, shExec)
	if err != nil {
		var exitError clientexec.CodeExitError
		if errors.As(err, &exitError) {
			actualExitCode := exitError.ExitStatus()
			if actualExitCode == exitCode {
				return nil
			}
			return fmt.Errorf("%q should fail with exit code %d, but failed with exit code %d and error message %w\nstdout: %s\nstderr: %s",
				shExec, exitCode, actualExitCode, exitError, stdout, stderr)
		} else {
			return fmt.Errorf("%q should fail with exit code %d, but failed with error message %w\nstdout: %s\nstderr: %s",
				shExec, exitCode, err, stdout, stderr)
		}
	}
	return fmt.Errorf("%q should fail with exit code %d, but exit without error", shExec, exitCode)
}