Golang deployment.Revision函数代码示例

// History returns a revision-to-replicaset map as the revision history of a deployment
func (h *DeploymentHistoryViewer) History(namespace, name string) (HistoryInfo, error) {
	historyInfo := HistoryInfo{
		RevisionToTemplate: make(map[int64]*api.PodTemplateSpec),
	}
	deployment, err := h.c.Extensions().Deployments(namespace).Get(name)
	if err != nil {
		return historyInfo, fmt.Errorf("failed to retrieve deployment %s: %v", name, err)
	}
	_, allOldRSs, err := deploymentutil.GetOldReplicaSets(*deployment, h.c)
	if err != nil {
		return historyInfo, fmt.Errorf("failed to retrieve old replica sets from deployment %s: %v", name, err)
	}
	newRS, err := deploymentutil.GetNewReplicaSet(*deployment, h.c)
	if err != nil {
		return historyInfo, fmt.Errorf("failed to retrieve new replica set from deployment %s: %v", name, err)
	}
	allRSs := append(allOldRSs, newRS)
	for _, rs := range allRSs {
		v, err := deploymentutil.Revision(rs)
		if err != nil {
			continue
		}
		historyInfo.RevisionToTemplate[v] = rs.Spec.Template
		changeCause := getChangeCause(rs)
		if historyInfo.RevisionToTemplate[v].Annotations == nil {
			historyInfo.RevisionToTemplate[v].Annotations = make(map[string]string)
		}
		historyInfo.RevisionToTemplate[v].Annotations[ChangeCauseAnnotation] = changeCause
	}
	return historyInfo, nil
}

func maxRevision(allRSs []*extensions.ReplicaSet) int64 {
	max := int64(0)
	for _, rs := range allRSs {
		if v, err := deploymentutil.Revision(rs); err != nil {
			// Skip the replica sets when it failed to parse their revision information
			glog.V(4).Infof("Error: %v. Couldn't parse revision for replica set %#v, deployment controller will skip it when reconciling revisions.", err, rs)
		} else if v > max {
			max = v
		}
	}
	return max
}

func maxRevision(allRCs []*api.ReplicationController) int64 {
	max := int64(0)
	for _, rc := range allRCs {
		if v, err := deploymentutil.Revision(rc); err != nil {
			// Skip the RCs when it failed to parse their revision information
			glog.V(4).Infof("Error: %v. Couldn't parse revision for rc %#v, deployment controller will skip it when reconciling revisions.", err, rc)
		} else if v > max {
			max = v
		}
	}
	return max
}

// Rolling back to a revision; no-op if the toRevision is deployment's current revision
func (dc *DeploymentController) rollback(deployment *extensions.Deployment, toRevision *int64) (*extensions.Deployment, error) {
	newRS, allOldRSs, err := dc.getAllReplicaSets(*deployment, true)
	if err != nil {
		return nil, err
	}
	allRSs := append(allOldRSs, newRS)
	// If rollback revision is 0, rollback to the last revision
	if *toRevision == 0 {
		if *toRevision = lastRevision(allRSs); *toRevision == 0 {
			// If we still can't find the last revision, gives up rollback
			dc.emitRollbackWarningEvent(deployment, deploymentutil.RollbackRevisionNotFound, "Unable to find last revision.")
			// Gives up rollback
			return dc.updateDeploymentAndClearRollbackTo(deployment)
		}
	}
	for _, rs := range allRSs {
		v, err := deploymentutil.Revision(rs)
		if err != nil {
			glog.V(4).Infof("Unable to extract revision from deployment's replica set %q: %v", rs.Name, err)
			continue
		}
		if v == *toRevision {
			glog.V(4).Infof("Found replica set %q with desired revision %d", rs.Name, v)
			// rollback by copying podTemplate.Spec from the replica set, and increment revision number by 1
			// no-op if the the spec matches current deployment's podTemplate.Spec
			deployment, performedRollback, err := dc.rollbackToTemplate(deployment, rs)
			if performedRollback && err == nil {
				dc.emitRollbackNormalEvent(deployment, fmt.Sprintf("Rolled back deployment %q to revision %d", deployment.Name, *toRevision))
			}
			return deployment, err
		}
	}
	dc.emitRollbackWarningEvent(deployment, deploymentutil.RollbackRevisionNotFound, "Unable to find the revision to rollback to.")
	// Gives up rollback
	return dc.updateDeploymentAndClearRollbackTo(deployment)
}

// History returns a revision-to-RC map as the revision history of a deployment
func (h *DeploymentHistoryViewer) History(namespace, name string) (HistoryInfo, error) {
	historyInfo := HistoryInfo{
		RevisionToTemplate: make(map[int64]*api.PodTemplateSpec),
	}
	deployment, err := h.c.Extensions().Deployments(namespace).Get(name)
	if err != nil {
		return historyInfo, fmt.Errorf("failed to retrieve deployment %s: %v", name, err)
	}
	_, allOldRCs, err := deploymentutil.GetOldRCs(*deployment, h.c)
	if err != nil {
		return historyInfo, fmt.Errorf("failed to retrieve old RCs from deployment %s: %v", name, err)
	}
	newRC, err := deploymentutil.GetNewRC(*deployment, h.c)
	if err != nil {
		return historyInfo, fmt.Errorf("failed to retrieve new RC from deployment %s: %v", name, err)
	}
	allRCs := append(allOldRCs, newRC)
	for _, rc := range allRCs {
		v, err := deploymentutil.Revision(rc)
		if err != nil {
			return historyInfo, fmt.Errorf("failed to retrieve revision out of RC %s from deployment %s: %v", rc.Name, name, err)
		}
		historyInfo.RevisionToTemplate[v] = rc.Spec.Template
		changeCause, err := getChangeCause(rc)
		if err != nil {
			return historyInfo, fmt.Errorf("failed to retrieve change-cause out of RC %s from deployment %s: %v", rc.Name, name, err)
		}
		if len(changeCause) > 0 {
			if historyInfo.RevisionToTemplate[v].Annotations == nil {
				historyInfo.RevisionToTemplate[v].Annotations = make(map[string]string)
			}
			historyInfo.RevisionToTemplate[v].Annotations[ChangeCauseAnnotation] = changeCause
		}
	}
	return historyInfo, nil
}

// ViewHistory prints the revision history of a deployment
func (h *DeploymentHistoryViewer) ViewHistory(namespace, name string, revision int64) (string, error) {
	deployment, err := h.c.Extensions().Deployments(namespace).Get(name)
	if err != nil {
		return "", fmt.Errorf("failed to retrieve deployment %s: %v", name, err)
	}
	_, allOldRSs, newRS, err := deploymentutil.GetAllReplicaSets(deployment, h.c)
	if err != nil {
		return "", fmt.Errorf("failed to retrieve old replica sets from deployment %s: %v", name, err)
	}

	historyInfo := make(map[int64]*api.PodTemplateSpec)
	allRSs := allOldRSs
	if newRS != nil {
		allRSs = append(allRSs, newRS)
	}
	for _, rs := range allRSs {
		v, err := deploymentutil.Revision(rs)
		if err != nil {
			continue
		}
		historyInfo[v] = &rs.Spec.Template
		changeCause := getChangeCause(rs)
		if historyInfo[v].Annotations == nil {
			historyInfo[v].Annotations = make(map[string]string)
		}
		if len(changeCause) > 0 {
			historyInfo[v].Annotations[ChangeCauseAnnotation] = changeCause
		}
	}

	if len(historyInfo) == 0 {
		return "No rollout history found.", nil
	}

	if revision > 0 {
		// Print details of a specific revision
		template, ok := historyInfo[revision]
		if !ok {
			return "", fmt.Errorf("unable to find the specified revision")
		}
		buf := bytes.NewBuffer([]byte{})
		DescribePodTemplate(template, buf)
		return buf.String(), nil
	}

	// Sort the revisionToChangeCause map by revision
	var revisions []int64
	for r := range historyInfo {
		revisions = append(revisions, r)
	}
	sliceutil.SortInts64(revisions)

	return tabbedString(func(out io.Writer) error {
		fmt.Fprintf(out, "REVISION\tCHANGE-CAUSE\n")
		for _, r := range revisions {
			// Find the change-cause of revision r
			changeCause := historyInfo[r].Annotations[ChangeCauseAnnotation]
			if len(changeCause) == 0 {
				changeCause = "<none>"
			}
			fmt.Fprintf(out, "%d\t%s\n", r, changeCause)
		}
		return nil
	})
}