/
verify.go
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/
verify.go
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/*
Copyright 2021 The Skaffold 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 k8sjob
import (
"context"
"fmt"
"io"
"math"
"sync"
"time"
"github.com/fatih/semgroup"
"github.com/pkg/errors"
"go.opentelemetry.io/otel/trace"
batchv1 "k8s.io/api/batch/v1"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/util/wait"
k8sclient "k8s.io/client-go/kubernetes"
component "github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/deploy/component/kubernetes"
"github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/deploy/kubectl"
"github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/deploy/label"
eventV2 "github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/event/v2"
"github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/graph"
"github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/instrumentation"
k8sjobutil "github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/k8sjob"
k8sjoblogger "github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/k8sjob/logger"
"github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/k8sjob/tracker"
"github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/kubernetes"
kubernetesclient "github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/kubernetes/client"
"github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/loader"
"github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/log"
"github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/schema/latest"
"github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/status"
"github.com/GoogleContainerTools/skaffold/v2/pkg/skaffold/util"
)
// Verifier verifies deployments using kubernetes libs/CLI.
type Verifier struct {
configName string
cfg []*latest.VerifyTestCase
tracker *tracker.JobTracker
imageLoader loader.ImageLoader
logger *k8sjoblogger.Logger
statusMonitor status.Monitor
localImages []graph.Artifact // the set of images marked as "local" by the Runner
kubectl kubectl.CLI
labeller *label.DefaultLabeller
envMap map[string]string
defaultNamespace string
}
// NewVerifier returns a new Verifier for a VerifyConfig filled
// with the needed configuration for `kubectl apply`
func NewVerifier(ctx context.Context, cfg kubectl.Config, labeller *label.DefaultLabeller, testCases []*latest.VerifyTestCase, artifacts []*latest.Artifact, envMap map[string]string, defaultNamespace string) (*Verifier, error) {
kubectl := kubectl.NewCLI(cfg, latest.KubectlFlags{}, defaultNamespace)
// default namespace must be "default" not "" when used to create and stream logs from Job(s)
if defaultNamespace == "" {
defaultNamespace = "default"
}
tracker := tracker.NewContainerTracker()
logger := k8sjoblogger.NewLogger(ctx, tracker, labeller, kubectl.KubeContext)
return &Verifier{
cfg: testCases,
defaultNamespace: defaultNamespace,
imageLoader: component.NewImageLoader(cfg, kubectl.CLI),
logger: logger,
statusMonitor: &status.NoopMonitor{},
kubectl: kubectl,
tracker: tracker,
labeller: labeller,
envMap: envMap,
}, nil
}
func (v *Verifier) ConfigName() string {
return v.configName
}
func (v *Verifier) GetLogger() log.Logger {
return v.logger
}
func (v *Verifier) GetStatusMonitor() status.Monitor {
return v.statusMonitor
}
func (v *Verifier) RegisterLocalImages(images []graph.Artifact) {
v.localImages = images
}
func (v *Verifier) TrackBuildArtifacts(artifacts []graph.Artifact) {
v.logger.RegisterArtifacts(artifacts)
}
// Verify executes specified artifacts by creating kubernetes Jobs for each image
// in the specified kubernetes cluster, executing them, and waiting for execution to complete.
func (v *Verifier) Verify(ctx context.Context, out io.Writer, allbuilds []graph.Artifact) error {
var (
childCtx context.Context
endTrace func(...trace.SpanEndOption)
wg sync.WaitGroup
)
// TODO(aaron-prindle) add trace info
if err := kubernetes.FailIfClusterIsNotReachable(v.kubectl.KubeContext); err != nil {
return fmt.Errorf("unable to connect to Kubernetes: %w", err)
}
childCtx, endTrace = instrumentation.StartTrace(ctx, "Verify_LoadImages")
if err := v.imageLoader.LoadImages(childCtx, out, v.localImages, v.localImages, v.localImages); err != nil {
endTrace(instrumentation.TraceEndError(err))
return err
}
endTrace()
builds := []graph.Artifact{}
const maxWorkers = math.MaxInt64
s := semgroup.NewGroup(context.Background(), maxWorkers)
for _, tc := range v.cfg {
foundArtifact := false
nTC := *tc
for _, b := range allbuilds {
if tc.Container.Image == b.ImageName {
foundArtifact = true
builds = append(builds, graph.Artifact{
ImageName: tc.Container.Image,
Tag: b.Tag,
})
nTC.Container.Image = b.Tag
break
}
}
if !foundArtifact {
builds = append(builds, graph.Artifact{
ImageName: tc.Container.Image,
Tag: tc.Name,
})
}
wg.Add(1)
go func(testcase latest.VerifyTestCase) {
defer wg.Done()
s.Go(func() error {
// TODO(aaron-prindle) i think we are using image tag for uniqueness?
// - should be container name?
return v.createAndRunJob(ctx, testcase)
})
}(nTC)
}
v.TrackBuildArtifacts(builds)
wg.Wait()
return s.Wait()
}
func (v *Verifier) createAndRunJob(ctx context.Context, tc latest.VerifyTestCase) error {
// TODO(aaron-prindle) look for and delete existing job w/ same name?
// - must be done before logger starts or else confusing output
clientset, err := kubernetesclient.Client(v.kubectl.KubeContext)
if err != nil {
return fmt.Errorf("getting Kubernetes client: %w", err)
}
var job *batchv1.Job
if tc.ExecutionMode.KubernetesClusterExecutionMode.JobManifestPath != "" {
job, err = v.createJobFromManifestPath(tc.Name, tc.Container, tc.ExecutionMode.KubernetesClusterExecutionMode.JobManifestPath)
if err != nil {
return err
}
} else {
job = v.createJob(tc.Name, tc.Container)
}
if tc.ExecutionMode.KubernetesClusterExecutionMode.Overrides != "" {
obj, err := k8sjobutil.ApplyOverrides(job, tc.ExecutionMode.KubernetesClusterExecutionMode.Overrides)
if err != nil {
return err
}
job = obj.(*batchv1.Job)
}
// appendEnvIntoJob mutates the job
v.appendEnvIntoJob(v.envMap, job)
eventV2.VerifyInProgress(tc.Name)
v.TrackContainerAndJobFromBuild(graph.Artifact{
ImageName: tc.Container.Name,
Tag: tc.Name,
}, tracker.Job{Name: tc.Container.Name, ID: job.Name}, job)
// This retrying is added as when attempting to kickoff multiple jobs simultaneously
// This is because the k8s API server can be unresponsive when hit with a large
// intitial set of Job CREATE requests
if waitErr := wait.Poll(100*time.Millisecond, 30*time.Second, func() (bool, error) {
_, err = clientset.BatchV1().Jobs(job.Namespace).Create(ctx, job, metav1.CreateOptions{})
if err != nil {
return false, nil
}
return true, nil
}); waitErr != nil {
if ctx.Err() != context.Canceled {
eventV2.VerifyFailed(tc.Name, err)
return errors.Wrap(err, "creating verify job in cluster")
}
}
var timeoutDuration *time.Duration = nil
if tc.Config.Timeout != nil {
timeoutDuration = util.Ptr(time.Second * time.Duration(*tc.Config.Timeout))
}
var execErr error
execCh := make(chan error)
go func() {
execCh <- v.watchJob(ctx, clientset, job, tc)
close(execCh)
}()
select {
case execErr = <-execCh:
case <-v.timeout(timeoutDuration):
execErr = errors.New(fmt.Sprintf("%q running k8s job timed out after : %v", tc.Name, *timeoutDuration))
v.logger.CancelJobLogger(job.Name)
if err := k8sjobutil.ForceJobDelete(ctx, job.Name, clientset.BatchV1().Jobs(job.Namespace), &v.kubectl); err != nil {
execErr = errors.Wrap(execErr, err.Error())
}
eventV2.VerifyFailed(tc.Name, execErr)
}
return execErr
}
func (v *Verifier) watchJob(ctx context.Context, clientset k8sclient.Interface, job *batchv1.Job, tc latest.VerifyTestCase) error {
w, err := clientset.BatchV1().Jobs(job.Namespace).Watch(ctx,
metav1.ListOptions{FieldSelector: fmt.Sprintf("metadata.name=%s", job.Name)})
if err != nil {
eventV2.VerifyFailed(tc.Name, err)
return errors.Wrap(err, "attempting to watch verify job in cluster")
}
defer w.Stop()
w, err = clientset.CoreV1().Pods(job.Namespace).Watch(ctx,
metav1.ListOptions{
LabelSelector: labels.Set(map[string]string{"job-name": job.Name}).String(),
})
if err != nil {
eventV2.VerifyFailed(tc.Name, err)
return errors.Wrap(err, "attempting to watch verify pods in cluster")
}
defer w.Stop()
var podErr error
for event := range w.ResultChan() {
pod, ok := event.Object.(*corev1.Pod)
if ok {
if pod.Status.Phase == corev1.PodSucceeded {
// TODO(aaron-prindle) add support for jobs w/ multiple pods in the future
break
}
if pod.Status.Phase == corev1.PodFailed {
podErr = errors.New(fmt.Sprintf("%q running job %q errored during run", tc.Name, job.Name))
break
}
if err := k8sjobutil.CheckIfPullImgErr(pod, job.Name); err != nil {
v.logger.CancelJobLogger(job.Name)
return err
}
}
}
if podErr != nil {
eventV2.VerifyFailed(tc.Name, podErr)
return errors.Wrap(podErr, "verify test failed")
}
eventV2.VerifySucceeded(tc.Name)
return nil
}
// Cleanup deletes what was verified by calling Verify.
func (v *Verifier) Cleanup(ctx context.Context, out io.Writer, dryRun bool) error {
instrumentation.AddAttributesToCurrentSpanFromContext(ctx, map[string]string{
"VerifierType": "kubernetesCluster",
})
clientset, err := kubernetesclient.Client(v.kubectl.KubeContext)
if err != nil {
return fmt.Errorf("getting Kubernetes client: %w", err)
}
for _, job := range v.tracker.DeployedJobs() {
// assumes the job namespace is set and not "" which is the case as createJob
// & createJobFromManifestPath set the namespace in the created Job
namespace := job.Namespace
if err := k8sjobutil.ForceJobDelete(ctx, job.Name, clientset.BatchV1().Jobs(namespace), &v.kubectl); err != nil {
// TODO(aaron-prindle): replace with actionable error
return errors.Wrap(err, "cleaning up deployed job")
}
}
return nil
}
// Dependencies lists all the files that describe what needs to be verified.
func (v *Verifier) Dependencies() ([]string, error) {
return []string{}, nil
}
// TrackContainerAndJobFromBuild adds an artifact and its newly-associated container
// to the container tracker.
func (v *Verifier) TrackContainerAndJobFromBuild(artifact graph.Artifact, container tracker.Job, job *batchv1.Job) {
v.tracker.Add(artifact, container, job.Namespace)
v.tracker.AddJob(job)
v.logger.RegisterJob(job.Name)
}
func (v *Verifier) createJob(jobName string, container latest.VerifyContainer) *batchv1.Job {
job := k8sjobutil.GetGenericJob()
job.ObjectMeta.Name = jobName
job.Namespace = v.defaultNamespace
job.Spec.Template.Spec.Containers = []corev1.Container{verifyContainerToK8sContainer(container)}
job.Labels["skaffold.dev/run-id"] = v.labeller.GetRunID()
job.Spec.Template.Labels["skaffold.dev/run-id"] = v.labeller.GetRunID()
job.Spec.Template.Spec.RestartPolicy = corev1.RestartPolicyNever
job.Spec.BackoffLimit = util.Ptr[int32](0)
return job
}
func verifyContainerToK8sContainer(vc latest.VerifyContainer) corev1.Container {
c := corev1.Container{
Name: vc.Name,
Image: vc.Image,
Command: vc.Command,
Args: vc.Args,
}
if len(vc.Env) > 0 {
cEnv := []corev1.EnvVar{}
for _, env := range vc.Env {
cEnv = append(cEnv, corev1.EnvVar{
Name: env.Name,
Value: env.Value,
})
}
c.Env = cEnv
}
return c
}
func (v *Verifier) createJobFromManifestPath(jobName string, container latest.VerifyContainer, manifestPath string) (*batchv1.Job, error) {
job, err := k8sjobutil.LoadFromPath(manifestPath)
if err != nil {
return nil, err
}
job.Name = jobName
job.Labels["skaffold.dev/run-id"] = v.labeller.GetRunID()
var original corev1.Container
for _, c := range job.Spec.Template.Spec.Containers {
if c.Name == container.Name {
original = c
break
}
}
patchToK8sContainer(container, &original)
job.Spec.Template.Spec.Containers = []corev1.Container{original}
job.Spec.Template.Spec.RestartPolicy = corev1.RestartPolicyNever
if job.Spec.Template.Labels == nil {
job.Spec.Template.Labels = map[string]string{}
}
job.Spec.Template.Labels["skaffold.dev/run-id"] = v.labeller.GetRunID()
if job.Namespace == "" {
job.Namespace = v.defaultNamespace
}
return job, nil
}
func patchToK8sContainer(container latest.VerifyContainer, dst *corev1.Container) {
dst.Image = container.Image
dst.Command = container.Command
dst.Args = container.Args
dst.Name = container.Name
for _, e := range container.Env {
dst.Env = append(dst.Env, corev1.EnvVar{
Name: e.Name,
Value: e.Value,
})
}
}
func (v *Verifier) appendEnvIntoJob(envMap map[string]string, job *batchv1.Job) {
var envs []corev1.EnvVar
for k, v := range envMap {
envs = append(envs, corev1.EnvVar{
Name: k,
Value: v,
})
}
for i := range job.Spec.Template.Spec.Containers {
job.Spec.Template.Spec.Containers[i].Env = append(job.Spec.Template.Spec.Containers[i].Env, envs...)
}
}
func (v *Verifier) timeout(duration *time.Duration) <-chan time.Time {
if duration != nil {
return time.After(*duration)
}
// Nil channel will never emit a value, so it will simulate an endless timeout.
return nil
}