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251 lines
7.4 KiB
251 lines
7.4 KiB
/*
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Copyright The Helm Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package action
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import (
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"strings"
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"time"
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"github.com/pkg/errors"
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v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"helm.sh/helm/v3/pkg/chartutil"
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"helm.sh/helm/v3/pkg/kube"
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"helm.sh/helm/v3/pkg/release"
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"helm.sh/helm/v3/pkg/releaseutil"
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helmtime "helm.sh/helm/v3/pkg/time"
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)
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// Uninstall is the action for uninstalling releases.
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//
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// It provides the implementation of 'helm uninstall'.
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type Uninstall struct {
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cfg *Configuration
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DisableHooks bool
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DryRun bool
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IgnoreNotFound bool
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KeepHistory bool
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Wait bool
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DeletionPropagation string
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Timeout time.Duration
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Description string
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}
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// NewUninstall creates a new Uninstall object with the given configuration.
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func NewUninstall(cfg *Configuration) *Uninstall {
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return &Uninstall{
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cfg: cfg,
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}
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}
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// Run uninstalls the given release.
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func (u *Uninstall) Run(name string) (*release.UninstallReleaseResponse, error) {
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if err := u.cfg.KubeClient.IsReachable(); err != nil {
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return nil, err
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}
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if u.DryRun {
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// In the dry run case, just see if the release exists
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r, err := u.cfg.releaseContent(name, 0)
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if err != nil {
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return &release.UninstallReleaseResponse{}, err
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}
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return &release.UninstallReleaseResponse{Release: r}, nil
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}
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if err := chartutil.ValidateReleaseName(name); err != nil {
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return nil, errors.Errorf("uninstall: Release name is invalid: %s", name)
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}
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rels, err := u.cfg.Releases.History(name)
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if err != nil {
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if u.IgnoreNotFound {
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return nil, nil
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}
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return nil, errors.Wrapf(err, "uninstall: Release not loaded: %s", name)
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}
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if len(rels) < 1 {
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return nil, errMissingRelease
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}
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releaseutil.SortByRevision(rels)
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rel := rels[len(rels)-1]
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// TODO: Are there any cases where we want to force a delete even if it's
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// already marked deleted?
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if rel.Info.Status == release.StatusUninstalled {
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if !u.KeepHistory {
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if err := u.purgeReleases(rels...); err != nil {
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return nil, errors.Wrap(err, "uninstall: Failed to purge the release")
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}
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return &release.UninstallReleaseResponse{Release: rel}, nil
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}
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return nil, errors.Errorf("the release named %q is already deleted", name)
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}
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u.cfg.Log("uninstall: Deleting %s", name)
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rel.Info.Status = release.StatusUninstalling
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rel.Info.Deleted = helmtime.Now()
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rel.Info.Description = "Deletion in progress (or silently failed)"
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res := &release.UninstallReleaseResponse{Release: rel}
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if !u.DisableHooks {
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if err := u.cfg.execHook(rel, release.HookPreDelete, u.Timeout); err != nil {
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return res, err
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}
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} else {
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u.cfg.Log("delete hooks disabled for %s", name)
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}
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// From here on out, the release is currently considered to be in StatusUninstalling
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// state.
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if err := u.cfg.Releases.Update(rel); err != nil {
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u.cfg.Log("uninstall: Failed to store updated release: %s", err)
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}
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deletedResources, kept, errs := u.deleteRelease(rel)
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if errs != nil {
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u.cfg.Log("uninstall: Failed to delete release: %s", errs)
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return nil, errors.Errorf("failed to delete release: %s", name)
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}
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if kept != "" {
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kept = "These resources were kept due to the resource policy:\n" + kept
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}
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res.Info = kept
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if u.Wait {
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if kubeClient, ok := u.cfg.KubeClient.(kube.InterfaceExt); ok {
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if err := kubeClient.WaitForDelete(deletedResources, u.Timeout); err != nil {
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errs = append(errs, err)
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}
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}
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}
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if !u.DisableHooks {
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if err := u.cfg.execHook(rel, release.HookPostDelete, u.Timeout); err != nil {
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errs = append(errs, err)
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}
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}
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rel.Info.Status = release.StatusUninstalled
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if len(u.Description) > 0 {
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rel.Info.Description = u.Description
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} else {
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rel.Info.Description = "Uninstallation complete"
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}
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if !u.KeepHistory {
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u.cfg.Log("purge requested for %s", name)
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err := u.purgeReleases(rels...)
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if err != nil {
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errs = append(errs, errors.Wrap(err, "uninstall: Failed to purge the release"))
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}
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// Return the errors that occurred while deleting the release, if any
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if len(errs) > 0 {
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return res, errors.Errorf("uninstallation completed with %d error(s): %s", len(errs), joinErrors(errs))
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}
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return res, nil
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}
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if err := u.cfg.Releases.Update(rel); err != nil {
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u.cfg.Log("uninstall: Failed to store updated release: %s", err)
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}
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if len(errs) > 0 {
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return res, errors.Errorf("uninstallation completed with %d error(s): %s", len(errs), joinErrors(errs))
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}
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return res, nil
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}
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func (u *Uninstall) purgeReleases(rels ...*release.Release) error {
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for _, rel := range rels {
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if _, err := u.cfg.Releases.Delete(rel.Name, rel.Version); err != nil {
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return err
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}
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}
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return nil
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}
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func joinErrors(errs []error) string {
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es := make([]string, 0, len(errs))
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for _, e := range errs {
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es = append(es, e.Error())
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}
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return strings.Join(es, "; ")
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}
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// deleteRelease deletes the release and returns list of delete resources and manifests that were kept in the deletion process
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func (u *Uninstall) deleteRelease(rel *release.Release) (kube.ResourceList, string, []error) {
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var errs []error
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caps, err := u.cfg.getCapabilities()
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if err != nil {
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return nil, rel.Manifest, []error{errors.Wrap(err, "could not get apiVersions from Kubernetes")}
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}
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manifests := releaseutil.SplitManifests(rel.Manifest)
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_, files, err := releaseutil.SortManifests(manifests, caps.APIVersions, releaseutil.UninstallOrder)
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if err != nil {
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// We could instead just delete everything in no particular order.
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// FIXME: One way to delete at this point would be to try a label-based
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// deletion. The problem with this is that we could get a false positive
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// and delete something that was not legitimately part of this release.
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return nil, rel.Manifest, []error{errors.Wrap(err, "corrupted release record. You must manually delete the resources")}
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}
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filesToKeep, filesToDelete := filterManifestsToKeep(files)
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var kept string
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for _, f := range filesToKeep {
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kept += "[" + f.Head.Kind + "] " + f.Head.Metadata.Name + "\n"
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}
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var builder strings.Builder
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for _, file := range filesToDelete {
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builder.WriteString("\n---\n" + file.Content)
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}
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resources, err := u.cfg.KubeClient.Build(strings.NewReader(builder.String()), false)
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if err != nil {
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return nil, "", []error{errors.Wrap(err, "unable to build kubernetes objects for delete")}
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}
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if len(resources) > 0 {
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if kubeClient, ok := u.cfg.KubeClient.(kube.InterfaceDeletionPropagation); ok {
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_, errs = kubeClient.DeleteWithPropagationPolicy(resources, parseCascadingFlag(u.cfg, u.DeletionPropagation))
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return resources, kept, errs
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}
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_, errs = u.cfg.KubeClient.Delete(resources)
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}
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return resources, kept, errs
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}
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func parseCascadingFlag(cfg *Configuration, cascadingFlag string) v1.DeletionPropagation {
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switch cascadingFlag {
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case "orphan":
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return v1.DeletePropagationOrphan
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case "foreground":
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return v1.DeletePropagationForeground
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case "background":
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return v1.DeletePropagationBackground
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default:
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cfg.Log("uninstall: given cascade value: %s, defaulting to delete propagation background", cascadingFlag)
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return v1.DeletePropagationBackground
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}
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}
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