Implement before-hook-creation delete policy
Existing helm.sh/hook-delete-policy annotation variables (hook-failed, hook-succeeded) do not allow to leave failed jobs for debugging without blocking the next job launching: every failed job must be deleted manually before the next related release is launching (installing, updating or rolling back). New policy, before-hook-creation, removes the hook from previous release if there is one before the new hook is launched and can be used with another variable.
This commit is contained in:
parent
48e7039970
commit
1d4883bf3c
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@ -38,6 +38,7 @@ message Hook {
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enum DeletePolicy {
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SUCCEEDED = 0;
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FAILED = 1;
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BEFORE_HOOK_CREATION = 2;
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}
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string name = 1;
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// Kind is the Kubernetes kind.
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@ -180,4 +180,19 @@ It is also possible to define policies that determine when to delete correspondi
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"helm.sh/hook-delete-policy": hook-succeeded
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```
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When using `"helm.sh/hook-delete-policy"` annotation, you can choose its value from `"hook-succeeded"` and `"hook-failed"`. The value `"hook-succeeded"` specifies Tiller should delete the hook after the hook is successfully executed, while the value `"hook-failed"`specifies Tiller should delete the hook if the hook failed during execution.
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You can choose one or more defined annotation values:
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* `"hook-succeeded"` specifies Tiller should delete the hook after the hook is successfully executed.
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* `"hook-failed"` specifies Tiller should delete the hook if the hook failed during execution.
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* `"before-hook-creation"` specifies Tiller should delete the previous hook before the new hook is launched.
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### Automatically delete hook from previous release
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When helm release being updated it is possible, that hook resource already exists in cluster. By default helm will try to create resource and fail with `"... already exists"` error.
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One might choose `"helm.sh/hook-delete-policy": "before-hook-creation"` over `"helm.sh/hook-delete-policy": "hook-succeeded,hook-failed"` because:
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* It is convinient to keep failed hook job resource in kubernetes for example for manual debug.
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* It may be necessary to keep succeeded hook resource in kubernetes for some reason.
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* At the same time it is not desireable to do manual resource deletion before helm release upgrade.
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`"helm.sh/hook-delete-policy": "before-hook-creation"` annotation on hook causes tiller to remove the hook from previous release if there is one before the new hook is launched and can be used with another policies.
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@ -47,6 +47,7 @@ const (
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const (
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HookSucceeded = "hook-succeeded"
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HookFailed = "hook-failed"
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BeforeHookCreation = "before-hook-creation"
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)
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// FilterTestHooks filters the list of hooks are returns only testing hooks.
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@ -91,15 +91,18 @@ type Hook_DeletePolicy int32
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const (
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Hook_SUCCEEDED Hook_DeletePolicy = 0
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Hook_FAILED Hook_DeletePolicy = 1
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Hook_BEFORE_HOOK_CREATION Hook_DeletePolicy = 2
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)
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var Hook_DeletePolicy_name = map[int32]string{
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0: "SUCCEEDED",
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1: "FAILED",
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2: "BEFORE_HOOK_CREATION",
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}
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var Hook_DeletePolicy_value = map[string]int32{
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"SUCCEEDED": 0,
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"FAILED": 1,
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"BEFORE_HOOK_CREATION": 2,
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}
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func (x Hook_DeletePolicy) String() string {
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@ -196,32 +199,33 @@ func init() {
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func init() { proto.RegisterFile("hapi/release/hook.proto", fileDescriptor0) }
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var fileDescriptor0 = []byte{
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// 428 bytes of a gzipped FileDescriptorProto
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// 445 bytes of a gzipped FileDescriptorProto
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0x22, 0xf0, 0xc9, 0xed, 0xac, 0xfb, 0xd5, 0x6c, 0x7e, 0xe4, 0xb3, 0xa1, 0x5e, 0xe9, 0xe3, 0x9f,
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0x00, 0x00, 0x00, 0xff, 0xff, 0x13, 0x64, 0x75, 0x6c, 0xa3, 0x02, 0x00, 0x00,
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}
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@ -48,6 +48,7 @@ var events = map[string]release.Hook_Event{
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var deletePolices = map[string]release.Hook_DeletePolicy{
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hooks.HookSucceeded: release.Hook_SUCCEEDED,
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hooks.HookFailed: release.Hook_FAILED,
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hooks.BeforeHookCreation: release.Hook_BEFORE_HOOK_CREATION,
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}
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// Manifest represents a manifest file, which has a name and some content.
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@ -189,21 +190,14 @@ func (file *manifestFile) sort(result *result) error {
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result.hooks = append(result.hooks, h)
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isKnownDeletePolices := false
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dps, ok := entry.Metadata.Annotations[hooks.HookDeleteAnno]
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if ok {
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for _, dp := range strings.Split(dps, ",") {
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dp = strings.ToLower(strings.TrimSpace(dp))
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p, exist := deletePolices[dp]
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operateAnnotationValues(entry, hooks.HookDeleteAnno, func(value string) {
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policy, exist := deletePolices[value]
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if exist {
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isKnownDeletePolices = true
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h.DeletePolicies = append(h.DeletePolicies, p)
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}
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}
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if !isKnownDeletePolices {
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log.Printf("info: skipping unknown hook delete policy: %q", dps)
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}
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h.DeletePolicies = append(h.DeletePolicies, policy)
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} else {
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log.Printf("info: skipping unknown hook delete policy: %q", value)
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}
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})
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}
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return nil
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@ -228,3 +222,12 @@ func calculateHookWeight(entry util.SimpleHead) int32 {
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return int32(hw)
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}
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func operateAnnotationValues(entry util.SimpleHead, annotation string, operate func(p string)) {
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if dps, ok := entry.Metadata.Annotations[annotation]; ok {
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for _, dp := range strings.Split(dps, ",") {
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dp = strings.ToLower(strings.TrimSpace(dp))
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operate(dp)
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}
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}
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}
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@ -347,6 +347,9 @@ func (s *ReleaseServer) execHook(hs []*release.Hook, name, namespace, hook strin
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executingHooks = sortByHookWeight(executingHooks)
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for _, h := range executingHooks {
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if err := s.deleteHookIfShouldBeDeletedByDeletePolicy(h, hooks.BeforeHookCreation, name, namespace, hook, kubeCli); err != nil {
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return err
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}
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b := bytes.NewBufferString(h.Manifest)
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if err := kubeCli.Create(namespace, b, timeout, false); err != nil {
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@ -356,18 +359,13 @@ func (s *ReleaseServer) execHook(hs []*release.Hook, name, namespace, hook strin
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// No way to rewind a bytes.Buffer()?
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b.Reset()
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b.WriteString(h.Manifest)
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if err := kubeCli.WatchUntilReady(namespace, b, timeout, false); err != nil {
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s.Log("warning: Release %s %s %s could not complete: %s", name, hook, h.Path, err)
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// If a hook is failed, checkout the annotation of the hook to determine whether the hook should be deleted
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// under failed condition. If so, then clear the corresponding resource object in the hook
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if hookShouldBeDeleted(h, hooks.HookFailed) {
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b.Reset()
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b.WriteString(h.Manifest)
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s.Log("deleting %s hook %s for release %s due to %q policy", hook, h.Name, name, hooks.HookFailed)
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if errHookDelete := kubeCli.Delete(namespace, b); errHookDelete != nil {
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s.Log("warning: Release %s %s %S could not be deleted: %s", name, hook, h.Path, errHookDelete)
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return errHookDelete
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}
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if err := s.deleteHookIfShouldBeDeletedByDeletePolicy(h, hooks.HookFailed, name, namespace, hook, kubeCli); err != nil {
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return err
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}
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return err
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}
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@ -377,13 +375,8 @@ func (s *ReleaseServer) execHook(hs []*release.Hook, name, namespace, hook strin
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// If all hooks are succeeded, checkout the annotation of each hook to determine whether the hook should be deleted
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// under succeeded condition. If so, then clear the corresponding resource object in each hook
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for _, h := range executingHooks {
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b := bytes.NewBufferString(h.Manifest)
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if hookShouldBeDeleted(h, hooks.HookSucceeded) {
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s.Log("deleting %s hook %s for release %s due to %q policy", hook, h.Name, name, hooks.HookSucceeded)
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if errHookDelete := kubeCli.Delete(namespace, b); errHookDelete != nil {
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s.Log("warning: Release %s %s %S could not be deleted: %s", name, hook, h.Path, errHookDelete)
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return errHookDelete
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}
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if err := s.deleteHookIfShouldBeDeletedByDeletePolicy(h, hooks.HookSucceeded, name, namespace, hook, kubeCli); err != nil {
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return err
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}
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h.LastRun = timeconv.Now()
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}
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@ -409,11 +402,23 @@ func validateReleaseName(releaseName string) error {
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return nil
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}
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func (s *ReleaseServer) deleteHookIfShouldBeDeletedByDeletePolicy(h *release.Hook, policy string, name, namespace, hook string, kubeCli environment.KubeClient) error {
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b := bytes.NewBufferString(h.Manifest)
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if hookHasDeletePolicy(h, policy) {
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s.Log("deleting %s hook %s for release %s due to %q policy", hook, h.Name, name, policy)
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if errHookDelete := kubeCli.Delete(namespace, b); errHookDelete != nil {
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s.Log("warning: Release %s %s %S could not be deleted: %s", name, hook, h.Path, errHookDelete)
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return errHookDelete
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}
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}
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return nil
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}
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// hookShouldBeDeleted determines whether the defined hook deletion policy matches the hook deletion polices
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// supported by helm. If so, mark the hook as one should be deleted.
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func hookShouldBeDeleted(hook *release.Hook, policy string) bool {
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func hookHasDeletePolicy(h *release.Hook, policy string) bool {
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if dp, ok := deletePolices[policy]; ok {
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for _, v := range hook.DeletePolicies {
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for _, v := range h.DeletePolicies {
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if dp == v {
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return true
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}
|
||||
|
|
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Reference in New Issue