ref(tiller): refactor tiller APIs into logical files

*ReleaseServer.RollbackRelease -> tiller/release_rollback.go
pull/2473/head
fibonacci1729 8 years ago
parent a3d44f4f02
commit b5c213d5dd

@ -0,0 +1,146 @@
/*
Copyright 2016 The Kubernetes Authors All rights reserved.
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 tiller
import (
"fmt"
ctx "golang.org/x/net/context"
"k8s.io/helm/pkg/hooks"
"k8s.io/helm/pkg/proto/hapi/release"
"k8s.io/helm/pkg/proto/hapi/services"
"k8s.io/helm/pkg/timeconv"
)
// RollbackRelease rolls back to a previous version of the given release.
func (s *ReleaseServer) RollbackRelease(c ctx.Context, req *services.RollbackReleaseRequest) (*services.RollbackReleaseResponse, error) {
err := s.env.Releases.LockRelease(req.Name)
if err != nil {
return nil, err
}
defer s.env.Releases.UnlockRelease(req.Name)
currentRelease, targetRelease, err := s.prepareRollback(req)
if err != nil {
return nil, err
}
res, err := s.performRollback(currentRelease, targetRelease, req)
if err != nil {
return res, err
}
if !req.DryRun {
if err := s.env.Releases.Create(targetRelease); err != nil {
return res, err
}
}
return res, nil
}
// prepareRollback finds the previous release and prepares a new release object with
// the previous release's configuration
func (s *ReleaseServer) prepareRollback(req *services.RollbackReleaseRequest) (*release.Release, *release.Release, error) {
switch {
case !ValidName.MatchString(req.Name):
return nil, nil, errMissingRelease
case req.Version < 0:
return nil, nil, errInvalidRevision
}
crls, err := s.env.Releases.Last(req.Name)
if err != nil {
return nil, nil, err
}
rbv := req.Version
if req.Version == 0 {
rbv = crls.Version - 1
}
s.Log("rolling back %s (current: v%d, target: v%d)", req.Name, crls.Version, rbv)
prls, err := s.env.Releases.Get(req.Name, rbv)
if err != nil {
return nil, nil, err
}
// Store a new release object with previous release's configuration
target := &release.Release{
Name: req.Name,
Namespace: crls.Namespace,
Chart: prls.Chart,
Config: prls.Config,
Info: &release.Info{
FirstDeployed: crls.Info.FirstDeployed,
LastDeployed: timeconv.Now(),
Status: &release.Status{
Code: release.Status_UNKNOWN,
Notes: prls.Info.Status.Notes,
},
// Because we lose the reference to rbv elsewhere, we set the
// message here, and only override it later if we experience failure.
Description: fmt.Sprintf("Rollback to %d", rbv),
},
Version: crls.Version + 1,
Manifest: prls.Manifest,
Hooks: prls.Hooks,
}
return crls, target, nil
}
func (s *ReleaseServer) performRollback(currentRelease, targetRelease *release.Release, req *services.RollbackReleaseRequest) (*services.RollbackReleaseResponse, error) {
res := &services.RollbackReleaseResponse{Release: targetRelease}
if req.DryRun {
s.Log("Dry run for %s", targetRelease.Name)
return res, nil
}
// pre-rollback hooks
if !req.DisableHooks {
if err := s.execHook(targetRelease.Hooks, targetRelease.Name, targetRelease.Namespace, hooks.PreRollback, req.Timeout); err != nil {
return res, err
}
}
if err := s.ReleaseModule.Rollback(currentRelease, targetRelease, req, s.env); err != nil {
msg := fmt.Sprintf("Rollback %q failed: %s", targetRelease.Name, err)
s.Log("warning: %s", msg)
currentRelease.Info.Status.Code = release.Status_SUPERSEDED
targetRelease.Info.Status.Code = release.Status_FAILED
targetRelease.Info.Description = msg
s.recordRelease(currentRelease, true)
s.recordRelease(targetRelease, false)
return res, err
}
// post-rollback hooks
if !req.DisableHooks {
if err := s.execHook(targetRelease.Hooks, targetRelease.Name, targetRelease.Namespace, hooks.PostRollback, req.Timeout); err != nil {
return res, err
}
}
currentRelease.Info.Status.Code = release.Status_SUPERSEDED
s.recordRelease(currentRelease, true)
targetRelease.Info.Status.Code = release.Status_DEPLOYED
return res, nil
}

@ -407,126 +407,6 @@ func (s *ReleaseServer) prepareUpdate(req *services.UpdateReleaseRequest) (*rele
return currentRelease, updatedRelease, err
}
// RollbackRelease rolls back to a previous version of the given release.
func (s *ReleaseServer) RollbackRelease(c ctx.Context, req *services.RollbackReleaseRequest) (*services.RollbackReleaseResponse, error) {
err := s.env.Releases.LockRelease(req.Name)
if err != nil {
return nil, err
}
defer s.env.Releases.UnlockRelease(req.Name)
currentRelease, targetRelease, err := s.prepareRollback(req)
if err != nil {
return nil, err
}
res, err := s.performRollback(currentRelease, targetRelease, req)
if err != nil {
return res, err
}
if !req.DryRun {
if err := s.env.Releases.Create(targetRelease); err != nil {
return res, err
}
}
return res, nil
}
func (s *ReleaseServer) performRollback(currentRelease, targetRelease *release.Release, req *services.RollbackReleaseRequest) (*services.RollbackReleaseResponse, error) {
res := &services.RollbackReleaseResponse{Release: targetRelease}
if req.DryRun {
s.Log("Dry run for %s", targetRelease.Name)
return res, nil
}
// pre-rollback hooks
if !req.DisableHooks {
if err := s.execHook(targetRelease.Hooks, targetRelease.Name, targetRelease.Namespace, hooks.PreRollback, req.Timeout); err != nil {
return res, err
}
}
if err := s.ReleaseModule.Rollback(currentRelease, targetRelease, req, s.env); err != nil {
msg := fmt.Sprintf("Rollback %q failed: %s", targetRelease.Name, err)
s.Log("warning: %s", msg)
currentRelease.Info.Status.Code = release.Status_SUPERSEDED
targetRelease.Info.Status.Code = release.Status_FAILED
targetRelease.Info.Description = msg
s.recordRelease(currentRelease, true)
s.recordRelease(targetRelease, false)
return res, err
}
// post-rollback hooks
if !req.DisableHooks {
if err := s.execHook(targetRelease.Hooks, targetRelease.Name, targetRelease.Namespace, hooks.PostRollback, req.Timeout); err != nil {
return res, err
}
}
currentRelease.Info.Status.Code = release.Status_SUPERSEDED
s.recordRelease(currentRelease, true)
targetRelease.Info.Status.Code = release.Status_DEPLOYED
return res, nil
}
// prepareRollback finds the previous release and prepares a new release object with
// the previous release's configuration
func (s *ReleaseServer) prepareRollback(req *services.RollbackReleaseRequest) (*release.Release, *release.Release, error) {
switch {
case !ValidName.MatchString(req.Name):
return nil, nil, errMissingRelease
case req.Version < 0:
return nil, nil, errInvalidRevision
}
crls, err := s.env.Releases.Last(req.Name)
if err != nil {
return nil, nil, err
}
rbv := req.Version
if req.Version == 0 {
rbv = crls.Version - 1
}
s.Log("rolling back %s (current: v%d, target: v%d)", req.Name, crls.Version, rbv)
prls, err := s.env.Releases.Get(req.Name, rbv)
if err != nil {
return nil, nil, err
}
// Store a new release object with previous release's configuration
target := &release.Release{
Name: req.Name,
Namespace: crls.Namespace,
Chart: prls.Chart,
Config: prls.Config,
Info: &release.Info{
FirstDeployed: crls.Info.FirstDeployed,
LastDeployed: timeconv.Now(),
Status: &release.Status{
Code: release.Status_UNKNOWN,
Notes: prls.Info.Status.Notes,
},
// Because we lose the reference to rbv elsewhere, we set the
// message here, and only override it later if we experience failure.
Description: fmt.Sprintf("Rollback to %d", rbv),
},
Version: crls.Version + 1,
Manifest: prls.Manifest,
Hooks: prls.Hooks,
}
return crls, target, nil
}
func (s *ReleaseServer) uniqName(start string, reuse bool) (string, error) {
// If a name is supplied, we check to see if that name is taken. If not, it

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