Golang kubectl.NewRetryParams函数代码示例

// DeployWithAcceptor scales down from and then scales up to. If
// updateAcceptor is provided and the desired replica count is >1, the first
// replica of to is rolled out and validated before performing the full scale
// up.
//
// This is currently only used in conjunction with the rolling update strategy
// for initial deployments.
func (s *RecreateDeploymentStrategy) DeployWithAcceptor(from *kapi.ReplicationController, to *kapi.ReplicationController, desiredReplicas int, updateAcceptor strat.UpdateAcceptor) error {
	config, err := deployutil.DecodeDeploymentConfig(to, s.codec)
	if err != nil {
		return fmt.Errorf("couldn't decode config from deployment %s: %v", to.Name, err)
	}

	params := config.Spec.Strategy.RecreateParams
	retryParams := kubectl.NewRetryParams(s.retryPeriod, s.retryTimeout)
	waitParams := kubectl.NewRetryParams(s.retryPeriod, s.retryTimeout)

	// Execute any pre-hook.
	if params != nil && params.Pre != nil {
		if err := s.hookExecutor.Execute(params.Pre, to, "prehook"); err != nil {
			return fmt.Errorf("Pre hook failed: %s", err)
		} else {
			glog.Infof("Pre hook finished")
		}
	}

	// Scale down the from deployment.
	if from != nil {
		glog.Infof("Scaling %s down to zero", deployutil.LabelForDeployment(from))
		_, err := s.scaleAndWait(from, 0, retryParams, waitParams)
		if err != nil {
			return fmt.Errorf("couldn't scale %s to 0: %v", deployutil.LabelForDeployment(from), err)
		}
	}

	// Scale up the to deployment.
	if desiredReplicas > 0 {
		// If an UpdateAcceptor is provided, scale up to 1 and validate the replica,
		// aborting if the replica isn't acceptable.
		if updateAcceptor != nil {
			glog.Infof("Scaling %s to 1 before performing acceptance check", deployutil.LabelForDeployment(to))
			updatedTo, err := s.scaleAndWait(to, 1, retryParams, waitParams)
			if err != nil {
				return fmt.Errorf("couldn't scale %s to 1: %v", deployutil.LabelForDeployment(to), err)
			}
			glog.Infof("Performing acceptance check of %s", deployutil.LabelForDeployment(to))
			if err := updateAcceptor.Accept(updatedTo); err != nil {
				return fmt.Errorf("update acceptor rejected %s: %v", deployutil.LabelForDeployment(to), err)
			}
			to = updatedTo
		}
		// Complete the scale up.
		if to.Spec.Replicas != desiredReplicas {
			glog.Infof("Scaling %s to %d", deployutil.LabelForDeployment(to), desiredReplicas)
			updatedTo, err := s.scaleAndWait(to, desiredReplicas, retryParams, waitParams)
			if err != nil {
				return fmt.Errorf("couldn't scale %s to %d: %v", deployutil.LabelForDeployment(to), desiredReplicas, err)
			}
			to = updatedTo
		}
	}

	// Execute any post-hook. Errors are logged and ignored.
	if params != nil && params.Post != nil {
		if err := s.hookExecutor.Execute(params.Post, to, "posthook"); err != nil {
			util.HandleError(fmt.Errorf("post hook failed: %s", err))
		} else {
			glog.Infof("Post hook finished")
		}
	}

	glog.Infof("Deployment %s successfully made active", to.Name)
	return nil
}

	It("should scale a job up", func() {
		startParallelism := 1
		endParallelism := 2
		By("Creating a job")
		job := newTestJob("notTerminate", "scale-up", api.RestartPolicyNever, startParallelism, completions)
		job, err := createJob(f.Client, f.Namespace.Name, job)
		Expect(err).NotTo(HaveOccurred())

		By("Ensuring active pods == startParallelism")
		err = waitForAllPodsRunning(f.Client, f.Namespace.Name, job.Name, startParallelism)
		Expect(err).NotTo(HaveOccurred())

		By("scale job up")
		scaler, err := kubectl.ScalerFor("Job", f.Client)
		Expect(err).NotTo(HaveOccurred())
		waitForScale := kubectl.NewRetryParams(5*time.Second, 1*time.Minute)
		waitForReplicas := kubectl.NewRetryParams(5*time.Second, 5*time.Minute)
		scaler.Scale(f.Namespace.Name, job.Name, uint(endParallelism), nil, waitForScale, waitForReplicas)
		Expect(err).NotTo(HaveOccurred())

		By("Ensuring active pods == endParallelism")
		err = waitForAllPodsRunning(f.Client, f.Namespace.Name, job.Name, endParallelism)
		Expect(err).NotTo(HaveOccurred())
	})

	It("should scale a job down", func() {
		startParallelism := 2
		endParallelism := 1
		By("Creating a job")
		job := newTestJob("notTerminate", "scale-down", api.RestartPolicyNever, startParallelism, completions)
		job, err := createJob(f.Client, f.Namespace.Name, job)

// Deploy starts the deployment process for deploymentName.
func (d *Deployer) Deploy(namespace, deploymentName string) error {
	// Look up the new deployment.
	to, err := d.getDeployment(namespace, deploymentName)
	if err != nil {
		return fmt.Errorf("couldn't get deployment %s/%s: %v", namespace, deploymentName, err)
	}

	// Decode the config from the deployment.
	config, err := deployutil.DecodeDeploymentConfig(to, latest.Codec)
	if err != nil {
		return fmt.Errorf("couldn't decode deployment config from deployment %s/%s: %v", to.Namespace, to.Name, err)
	}

	// Get a strategy for the deployment.
	strategy, err := d.strategyFor(config)
	if err != nil {
		return err
	}

	// New deployments must have a desired replica count.
	desiredReplicas, hasDesired := deployutil.DeploymentDesiredReplicas(to)
	if !hasDesired {
		return fmt.Errorf("deployment %s has no desired replica count", deployutil.LabelForDeployment(to))
	}

	// Find all deployments for the config.
	unsortedDeployments, err := d.getDeployments(namespace, config.Name)
	if err != nil {
		return fmt.Errorf("couldn't get controllers in namespace %s: %v", namespace, err)
	}
	deployments := unsortedDeployments.Items

	// Sort all the deployments by version.
	sort.Sort(deployutil.ByLatestVersionDesc(deployments))

	// Find any last completed deployment.
	var from *kapi.ReplicationController
	for _, candidate := range deployments {
		if candidate.Name == to.Name {
			continue
		}
		if deployutil.DeploymentStatusFor(&candidate) == deployapi.DeploymentStatusComplete {
			from = &candidate
			break
		}
	}

	// Scale down any deployments which aren't the new or last deployment.
	for _, candidate := range deployments {
		// Skip the from/to deployments.
		if candidate.Name == to.Name {
			continue
		}
		if from != nil && candidate.Name == from.Name {
			continue
		}
		// Skip the deployment if it's already scaled down.
		if candidate.Spec.Replicas == 0 {
			continue
		}
		// Scale the deployment down to zero.
		retryWaitParams := kubectl.NewRetryParams(1*time.Second, 120*time.Second)
		if err := d.scaler.Scale(candidate.Namespace, candidate.Name, uint(0), &kubectl.ScalePrecondition{Size: -1, ResourceVersion: ""}, retryWaitParams, retryWaitParams); err != nil {
			glog.Errorf("Couldn't scale down prior deployment %s: %v", deployutil.LabelForDeployment(&candidate), err)
		} else {
			glog.Infof("Scaled down prior deployment %s", deployutil.LabelForDeployment(&candidate))
		}
	}

	// Perform the deployment.
	if from == nil {
		glog.Infof("Deploying %s for the first time (replicas: %d)", deployutil.LabelForDeployment(to), desiredReplicas)
	} else {
		glog.Infof("Deploying from %s to %s (replicas: %d)", deployutil.LabelForDeployment(from), deployutil.LabelForDeployment(to), desiredReplicas)
	}
	return strategy.Deploy(from, to, desiredReplicas)
}

// RunScale executes the scaling
func RunScale(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string, shortOutput bool, options *resource.FilenameOptions) error {
	if len(os.Args) > 1 && os.Args[1] == "resize" {
		printDeprecationWarning("scale", "resize")
	}

	cmdNamespace, enforceNamespace, err := f.DefaultNamespace()
	if err != nil {
		return err
	}

	mapper, typer := f.Object()
	r := resource.NewBuilder(mapper, typer, resource.ClientMapperFunc(f.ClientForMapping), f.Decoder(true)).
		ContinueOnError().
		NamespaceParam(cmdNamespace).DefaultNamespace().
		FilenameParam(enforceNamespace, options).
		ResourceTypeOrNameArgs(false, args...).
		Flatten().
		Do()
	err = r.Err()
	if resource.IsUsageError(err) {
		return cmdutil.UsageError(cmd, err.Error())
	}
	if err != nil {
		return err
	}

	count := cmdutil.GetFlagInt(cmd, "replicas")
	if count < 0 {
		return cmdutil.UsageError(cmd, "The --replicas=COUNT flag is required, and COUNT must be greater than or equal to 0")
	}

	infos := []*resource.Info{}
	err = r.Visit(func(info *resource.Info, err error) error {
		if err == nil {
			infos = append(infos, info)
		}
		return nil
	})

	resourceVersion := cmdutil.GetFlagString(cmd, "resource-version")
	if len(resourceVersion) != 0 && len(infos) > 1 {
		return fmt.Errorf("cannot use --resource-version with multiple resources")
	}

	counter := 0
	err = r.Visit(func(info *resource.Info, err error) error {
		if err != nil {
			return err
		}

		mapping := info.ResourceMapping()
		scaler, err := f.Scaler(mapping)
		if err != nil {
			return err
		}

		currentSize := cmdutil.GetFlagInt(cmd, "current-replicas")
		precondition := &kubectl.ScalePrecondition{Size: currentSize, ResourceVersion: resourceVersion}
		retry := kubectl.NewRetryParams(kubectl.Interval, kubectl.Timeout)

		var waitForReplicas *kubectl.RetryParams
		if timeout := cmdutil.GetFlagDuration(cmd, "timeout"); timeout != 0 {
			waitForReplicas = kubectl.NewRetryParams(kubectl.Interval, timeout)
		}

		if err := scaler.Scale(info.Namespace, info.Name, uint(count), precondition, retry, waitForReplicas); err != nil {
			return err
		}
		if cmdutil.ShouldRecord(cmd, info) {
			patchBytes, err := cmdutil.ChangeResourcePatch(info, f.Command())
			if err != nil {
				return err
			}
			mapping := info.ResourceMapping()
			client, err := f.ClientForMapping(mapping)
			if err != nil {
				return err
			}
			helper := resource.NewHelper(client, mapping)
			_, err = helper.Patch(info.Namespace, info.Name, api.StrategicMergePatchType, patchBytes)
			if err != nil {
				return err
			}
		}
		counter++
		cmdutil.PrintSuccess(mapper, shortOutput, out, info.Mapping.Resource, info.Name, false, "scaled")
		return nil
	})
	if err != nil {
		return err
	}
	if counter == 0 {
		return fmt.Errorf("no objects passed to scale")
	}
	return nil
}

// RunScale executes the scaling
func RunScale(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string, shortOutput bool, options *ScaleOptions) error {
	if len(os.Args) > 1 && os.Args[1] == "resize" {
		printDeprecationWarning("scale", "resize")
	}

	count := cmdutil.GetFlagInt(cmd, "replicas")
	if count < 0 {
		return cmdutil.UsageError(cmd, "--replicas=COUNT is required, and COUNT must be greater than or equal to 0")
	}

	cmdNamespace, enforceNamespace, err := f.DefaultNamespace()
	if err != nil {
		return err
	}
	cmdTenant, enforceTenant, err := f.DefaultTenant()
	if err != nil {
		return err
	}

	mapper, typer := f.Object()
	r := resource.NewBuilder(mapper, typer, f.ClientMapperForCommand()).
		ContinueOnError().
		NamespaceParam(cmdNamespace).DefaultNamespace().
		TenantParam(cmdTenant).DefaultTenant().
		FilenameParam(enforceTenant, enforceNamespace, options.Filenames...).
		ResourceTypeOrNameArgs(false, args...).
		Flatten().
		Do()
	err = r.Err()
	if err != nil {
		return err
	}

	infos, err := r.Infos()
	if err != nil {
		return err
	}
	info := infos[0]
	mapping := info.ResourceMapping()
	scaler, err := f.Scaler(mapping)
	if err != nil {
		return err
	}

	resourceVersion := cmdutil.GetFlagString(cmd, "resource-version")
	if len(resourceVersion) != 0 && len(infos) > 1 {
		return fmt.Errorf("cannot use --resource-version with multiple controllers")
	}
	currentSize := cmdutil.GetFlagInt(cmd, "current-replicas")
	if currentSize != -1 && len(infos) > 1 {
		return fmt.Errorf("cannot use --current-replicas with multiple controllers")
	}
	precondition := &kubectl.ScalePrecondition{Size: currentSize, ResourceVersion: resourceVersion}
	retry := kubectl.NewRetryParams(kubectl.Interval, kubectl.Timeout)
	var waitForReplicas *kubectl.RetryParams
	if timeout := cmdutil.GetFlagDuration(cmd, "timeout"); timeout != 0 {
		waitForReplicas = kubectl.NewRetryParams(kubectl.Interval, timeout)
	}

	errs := []error{}
	for _, info := range infos {
		if err := scaler.Scale(info.Namespace, info.Name, uint(count), precondition, retry, waitForReplicas); err != nil {
			errs = append(errs, err)
			continue
		}
		cmdutil.PrintSuccess(mapper, shortOutput, out, info.Mapping.Resource, info.Name, "scaled")
	}

	return utilerrors.NewAggregate(errs)
}

// Deploy starts the deployment process for rcName.
func (d *Deployer) Deploy(namespace, rcName string) error {
	// Look up the new deployment.
	to, err := d.getDeployment(namespace, rcName)
	if err != nil {
		return fmt.Errorf("couldn't get deployment %s: %v", rcName, err)
	}

	// Decode the config from the deployment.
	config, err := deployutil.DecodeDeploymentConfig(to, kapi.Codecs.UniversalDecoder())
	if err != nil {
		return fmt.Errorf("couldn't decode deployment config from deployment %s: %v", to.Name, err)
	}

	// Get a strategy for the deployment.
	s, err := d.strategyFor(config)
	if err != nil {
		return err
	}

	// New deployments must have a desired replica count.
	desiredReplicas, hasDesired := deployutil.DeploymentDesiredReplicas(to)
	if !hasDesired {
		return fmt.Errorf("deployment %s has already run to completion", to.Name)
	}

	// Find all deployments for the config.
	unsortedDeployments, err := d.getDeployments(namespace, config.Name)
	if err != nil {
		return fmt.Errorf("couldn't get controllers in namespace %s: %v", namespace, err)
	}
	deployments := unsortedDeployments.Items

	// Sort all the deployments by version.
	sort.Sort(deployutil.ByLatestVersionDesc(deployments))

	// Find any last completed deployment.
	var from *kapi.ReplicationController
	for _, candidate := range deployments {
		if candidate.Name == to.Name {
			continue
		}
		if deployutil.IsCompleteDeployment(&candidate) {
			from = &candidate
			break
		}
	}

	if deployutil.DeploymentVersionFor(to) < deployutil.DeploymentVersionFor(from) {
		return fmt.Errorf("deployment %s is older than %s", to.Name, from.Name)
	}

	// Scale down any deployments which aren't the new or last deployment.
	for _, candidate := range deployments {
		// Skip the from/to deployments.
		if candidate.Name == to.Name {
			continue
		}
		if from != nil && candidate.Name == from.Name {
			continue
		}
		// Skip the deployment if it's already scaled down.
		if candidate.Spec.Replicas == 0 {
			continue
		}
		// Scale the deployment down to zero.
		retryWaitParams := kubectl.NewRetryParams(1*time.Second, 120*time.Second)
		if err := d.scaler.Scale(candidate.Namespace, candidate.Name, uint(0), &kubectl.ScalePrecondition{Size: -1, ResourceVersion: ""}, retryWaitParams, retryWaitParams); err != nil {
			fmt.Fprintf(d.errOut, "error: Couldn't scale down prior deployment %s: %v\n", deployutil.LabelForDeployment(&candidate), err)
		} else {
			fmt.Fprintf(d.out, "--> Scaled older deployment %s down\n", candidate.Name)
		}
	}

	if d.until == "start" {
		return strategy.NewConditionReachedErr("Ready to start deployment")
	}

	// Perform the deployment.
	if err := s.Deploy(from, to, int(desiredReplicas)); err != nil {
		return err
	}
	fmt.Fprintf(d.out, "--> Success\n")
	return nil
}

// DeployWithAcceptor scales down from and then scales up to. If
// updateAcceptor is provided and the desired replica count is >1, the first
// replica of to is rolled out and validated before performing the full scale
// up.
//
// This is currently only used in conjunction with the rolling update strategy
// for initial deployments.
func (s *RecreateDeploymentStrategy) DeployWithAcceptor(from *kapi.ReplicationController, to *kapi.ReplicationController, desiredReplicas int, updateAcceptor strat.UpdateAcceptor) error {
	config, err := deployutil.DecodeDeploymentConfig(to, s.decoder)
	if err != nil {
		return fmt.Errorf("couldn't decode config from deployment %s: %v", to.Name, err)
	}

	params := config.Spec.Strategy.RecreateParams
	retryParams := kubectl.NewRetryParams(s.retryPeriod, s.retryTimeout)
	waitParams := kubectl.NewRetryParams(s.retryPeriod, s.retryTimeout)

	if updateAcceptor == nil {
		updateAcceptor = s.getUpdateAcceptor(time.Duration(*params.TimeoutSeconds)*time.Second, config.Spec.MinReadySeconds)
	}

	// Execute any pre-hook.
	if params != nil && params.Pre != nil {
		if err := s.hookExecutor.Execute(params.Pre, to, deployapi.PreHookPodSuffix, "pre"); err != nil {
			return fmt.Errorf("pre hook failed: %s", err)
		}
	}

	if s.until == "pre" {
		return strat.NewConditionReachedErr("pre hook succeeded")
	}

	// Record all warnings
	defer stratutil.RecordConfigWarnings(s.eventClient, from, s.decoder, s.out)
	defer stratutil.RecordConfigWarnings(s.eventClient, to, s.decoder, s.out)

	// Scale down the from deployment.
	if from != nil {
		fmt.Fprintf(s.out, "--> Scaling %s down to zero\n", from.Name)
		_, err := s.scaleAndWait(from, 0, retryParams, waitParams)
		if err != nil {
			return fmt.Errorf("couldn't scale %s to 0: %v", from.Name, err)
		}
	}

	if s.until == "0%" {
		return strat.NewConditionReachedErr("Reached 0% (no running pods)")
	}

	if params != nil && params.Mid != nil {
		if err := s.hookExecutor.Execute(params.Mid, to, deployapi.MidHookPodSuffix, "mid"); err != nil {
			return fmt.Errorf("mid hook failed: %s", err)
		}
	}

	if s.until == "mid" {
		return strat.NewConditionReachedErr("mid hook succeeded")
	}

	accepted := false

	// Scale up the to deployment.
	if desiredReplicas > 0 {
		if from != nil {
			// Scale up to 1 and validate the replica,
			// aborting if the replica isn't acceptable.
			fmt.Fprintf(s.out, "--> Scaling %s to 1 before performing acceptance check\n", to.Name)
			updatedTo, err := s.scaleAndWait(to, 1, retryParams, waitParams)
			if err != nil {
				return fmt.Errorf("couldn't scale %s to 1: %v", to.Name, err)
			}
			if err := updateAcceptor.Accept(updatedTo); err != nil {
				return fmt.Errorf("update acceptor rejected %s: %v", to.Name, err)
			}
			accepted = true
			to = updatedTo

			if strat.PercentageBetween(s.until, 1, 99) {
				return strat.NewConditionReachedErr(fmt.Sprintf("Reached %s", s.until))
			}
		}

		// Complete the scale up.
		if to.Spec.Replicas != int32(desiredReplicas) {
			fmt.Fprintf(s.out, "--> Scaling %s to %d\n", to.Name, desiredReplicas)
			updatedTo, err := s.scaleAndWait(to, desiredReplicas, retryParams, waitParams)
			if err != nil {
				return fmt.Errorf("couldn't scale %s to %d: %v", to.Name, desiredReplicas, err)
			}

			to = updatedTo
		}

		if !accepted {
			if err := updateAcceptor.Accept(to); err != nil {
				return fmt.Errorf("update acceptor rejected %s: %v", to.Name, err)
			}
		}
	}

//.........这里部分代码省略.........