From 734b1245772ff4e8319e3648646e1c0f1d797d87 Mon Sep 17 00:00:00 2001
From: DockerZK <zhaoxinkui@huawei.com>
Date: Sun, 16 Jul 2017 17:17:55 +0800
Subject: [PATCH] feat(*) add key helm.sh/hook-delete-policy to hook annotation
When "helm.sh/hook-delete-policy: hook-succeeded" is provided in a hook's annotation, Tiller will automatically delete the hook after the hook is succeeded. When "helm.sh/hook-delete-policy: hook-failed" is provided in a hook's annotation, Tiller will automatically delete the hook after the hook is failed.
Closes #1769
---
_proto/hapi/release/hook.proto | 6 ++
docs/charts_hooks.md | 18 ++++--
pkg/hooks/hooks.go | 9 +++
pkg/proto/hapi/release/hook.pb.go | 94 +++++++++++++++++++------------
pkg/tiller/hooks.go | 42 ++++++++++++--
pkg/tiller/release_server.go | 40 ++++++++++++-
6 files changed, 163 insertions(+), 46 deletions(-)
diff --git a/_proto/hapi/release/hook.proto b/_proto/hapi/release/hook.proto
index 2237883ca..22c1fedef 100644
--- a/_proto/hapi/release/hook.proto
+++ b/_proto/hapi/release/hook.proto
@@ -35,6 +35,10 @@ message Hook {
RELEASE_TEST_SUCCESS = 9;
RELEASE_TEST_FAILURE = 10;
}
+ enum DeletePolicy {
+ SUCCEEDED = 0;
+ FAILED = 1;
+ }
string name = 1;
// Kind is the Kubernetes kind.
string kind = 2;
@@ -48,4 +52,6 @@ message Hook {
google.protobuf.Timestamp last_run = 6;
// Weight indicates the sort order for execution among similar Hook type
int32 weight = 7;
+ // DeletePolicies are the policies that indicate when to delete the hook
+ repeated DeletePolicy delete_policies = 8;
}
diff --git a/docs/charts_hooks.md b/docs/charts_hooks.md
index 6ac9bc2b0..dec3e552e 100644
--- a/docs/charts_hooks.md
+++ b/docs/charts_hooks.md
@@ -87,7 +87,7 @@ in the future.) It is considered good practice to add a hook weight, and set it
to `0` if weight is not important.
-### Hook resources are unmanaged
+### Hook resources are not managed with correponding releases
The resources that a hook creates are not tracked or managed as part of the
release. Once Tiller verifies that the hook has reached its ready state, it
@@ -95,8 +95,8 @@ will leave the hook resource alone.
Practically speaking, this means that if you create resources in a hook, you
cannot rely upon `helm delete` to remove the resources. To destroy such
-resources, you need to write code to perform this operation in a `pre-delete`
-or `post-delete` hook.
+resources, you need to either write code to perform this operation in a `pre-delete`
+or `post-delete` hook or add `"helm.sh/hook-delete-policy"` annotation to the hook template file.
## Writing a Hook
@@ -122,6 +122,7 @@ metadata:
# job is considered part of the release.
"helm.sh/hook": post-install
"helm.sh/hook-weight": "-5"
+ "helm/hook-delete-policy": hook-succeeded
spec:
template:
metadata:
@@ -160,7 +161,7 @@ and a config map as a pre-install hook.
When subcharts declare hooks, those are also evaluated. There is no way
for a top-level chart to disable the hooks declared by subcharts.
-It is also possible to define a weight for a hook which will help build a
+It is possible to define a weight for a hook which will help build a
deterministic executing order. Weights are defined using the following annotation:
```
@@ -172,3 +173,12 @@ Hook weights can be positive or negative numbers but must be represented as
strings. When Tiller starts the execution cycle of hooks of a particular Kind it
will sort those hooks in ascending order.
+It is also possible to define policies that determine when to delete corresponding hook resources. Hook deletion policies are defined using the following annotation:
+
+```
+ annotations:
+ "helm.sh/hook-delete-policy": hook-succeeded
+```
+
+When using `"helm.sh/hook-delete-policy"` annoation, 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 excuted, while the value `"hook-failed"`specifies Tiller should delete the hook if the hook is failed during execuation.
+
diff --git a/pkg/hooks/hooks.go b/pkg/hooks/hooks.go
index e1fccb416..ed2d946a4 100644
--- a/pkg/hooks/hooks.go
+++ b/pkg/hooks/hooks.go
@@ -26,6 +26,9 @@ const HookAnno = "helm.sh/hook"
// HookWeightAnno is the label name for a hook weight
const HookWeightAnno = "helm.sh/hook-weight"
+// HookDeleteAnno is the label name for the delete policy for a hook
+const HookDeleteAnno = "helm.sh/hook-delete-policy"
+
// Types of hooks
const (
PreInstall = "pre-install"
@@ -40,6 +43,12 @@ const (
ReleaseTestFailure = "test-failure"
)
+// Type of policy for deleting the hook
+const (
+ HookSucceeded = "hook-succeeded"
+ HookFailed = "hook-failed"
+)
+
// FilterTestHooks filters the list of hooks are returns only testing hooks.
func FilterTestHooks(hooks []*release.Hook) []*release.Hook {
testHooks := []*release.Hook{}
diff --git a/pkg/proto/hapi/release/hook.pb.go b/pkg/proto/hapi/release/hook.pb.go
index f7d5419cc..bd9391c50 100644
--- a/pkg/proto/hapi/release/hook.pb.go
+++ b/pkg/proto/hapi/release/hook.pb.go
@@ -6,19 +6,9 @@ Package release is a generated protocol buffer package.
It is generated from these files:
hapi/release/hook.proto
- hapi/release/info.proto
- hapi/release/release.proto
- hapi/release/status.proto
- hapi/release/test_run.proto
- hapi/release/test_suite.proto
It has these top-level messages:
Hook
- Info
- Release
- Status
- TestRun
- TestSuite
*/
package release
@@ -86,6 +76,27 @@ func (x Hook_Event) String() string {
}
func (Hook_Event) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{0, 0} }
+type Hook_DeletePolicy int32
+
+const (
+ Hook_SUCCEEDED Hook_DeletePolicy = 0
+ Hook_FAILED Hook_DeletePolicy = 1
+)
+
+var Hook_DeletePolicy_name = map[int32]string{
+ 0: "SUCCEEDED",
+ 1: "FAILED",
+}
+var Hook_DeletePolicy_value = map[string]int32{
+ "SUCCEEDED": 0,
+ "FAILED": 1,
+}
+
+func (x Hook_DeletePolicy) String() string {
+ return proto.EnumName(Hook_DeletePolicy_name, int32(x))
+}
+func (Hook_DeletePolicy) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{0, 1} }
+
// Hook defines a hook object.
type Hook struct {
Name string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
@@ -101,6 +112,8 @@ type Hook struct {
LastRun *google_protobuf.Timestamp `protobuf:"bytes,6,opt,name=last_run,json=lastRun" json:"last_run,omitempty"`
// Weight indicates the sort order for execution among similar Hook type
Weight int32 `protobuf:"varint,7,opt,name=weight" json:"weight,omitempty"`
+ // DeletePolicies are the policies that indicate when to delete the hook
+ DeletePolicies []Hook_DeletePolicy `protobuf:"varint,8,rep,packed,name=delete_policies,json=deletePolicies,enum=hapi.release.Hook_DeletePolicy" json:"delete_policies,omitempty"`
}
func (m *Hook) Reset() { *m = Hook{} }
@@ -157,37 +170,48 @@ func (m *Hook) GetWeight() int32 {
return 0
}
+func (m *Hook) GetDeletePolicies() []Hook_DeletePolicy {
+ if m != nil {
+ return m.DeletePolicies
+ }
+ return nil
+}
+
func init() {
proto.RegisterType((*Hook)(nil), "hapi.release.Hook")
proto.RegisterEnum("hapi.release.Hook_Event", Hook_Event_name, Hook_Event_value)
+ proto.RegisterEnum("hapi.release.Hook_DeletePolicy", Hook_DeletePolicy_name, Hook_DeletePolicy_value)
}
func init() { proto.RegisterFile("hapi/release/hook.proto", fileDescriptor0) }
var fileDescriptor0 = []byte{
- // 371 bytes of a gzipped FileDescriptorProto
- 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x64, 0x90, 0xdf, 0x8e, 0x93, 0x40,
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- 0xc1, 0xe2, 0x54, 0x74, 0x2a, 0x3f, 0x5f, 0x1a, 0xe2, 0x78, 0x96, 0xbf, 0xba, 0x5b, 0xd3, 0x7e,
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- 0xfc, 0x31, 0x4e, 0xd2, 0x30, 0x8a, 0x90, 0x85, 0x11, 0x5c, 0xef, 0xb6, 0x49, 0x3a, 0x91, 0x2b,
- 0x7c, 0x03, 0xa0, 0x95, 0x07, 0x16, 0xb1, 0x94, 0xa1, 0x99, 0xf9, 0x44, 0x1b, 0x03, 0x98, 0x8f,
- 0x3d, 0xb2, 0xdd, 0x17, 0x1e, 0x3e, 0x30, 0x64, 0x4f, 0x3d, 0x46, 0xe2, 0x18, 0xc2, 0x59, 0xce,
- 0xb7, 0x51, 0x74, 0x1f, 0x6e, 0x9e, 0x90, 0x8b, 0x5f, 0xc3, 0x4b, 0xe3, 0x4c, 0x68, 0x81, 0x09,
- 0xbc, 0xe1, 0x2c, 0x62, 0x61, 0xc2, 0xf2, 0x94, 0x25, 0x69, 0x9e, 0x64, 0x9b, 0x0d, 0x4b, 0x12,
- 0xb4, 0xfc, 0x2f, 0xf9, 0x1c, 0x3e, 0x46, 0x19, 0x67, 0x08, 0xee, 0x97, 0xdf, 0xdd, 0xe1, 0x86,
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- 0x02, 0x00, 0x00,
+ // 428 bytes of a gzipped FileDescriptorProto
+ 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x6c, 0x91, 0xd1, 0x6e, 0xda, 0x30,
+ 0x14, 0x86, 0x9b, 0x12, 0x12, 0x38, 0x50, 0xea, 0x59, 0xd3, 0x66, 0x71, 0x53, 0xc4, 0x15, 0xbb,
+ 0x09, 0x53, 0xa7, 0x3d, 0x40, 0x4a, 0xce, 0xd6, 0xaa, 0x11, 0x20, 0x27, 0x68, 0xd2, 0x6e, 0xa2,
+ 0x74, 0xb8, 0x10, 0x11, 0xe2, 0x88, 0x98, 0x4d, 0x7b, 0xa6, 0xbd, 0xce, 0x1e, 0x68, 0xb2, 0x09,
+ 0x59, 0xa5, 0xed, 0xee, 0x9c, 0xef, 0x7c, 0x76, 0xce, 0x1f, 0xc3, 0xdb, 0x6d, 0x5a, 0x66, 0xd3,
+ 0x83, 0xc8, 0x45, 0x5a, 0x89, 0xe9, 0x56, 0xca, 0x9d, 0x57, 0x1e, 0xa4, 0x92, 0xb4, 0xaf, 0x07,
+ 0x5e, 0x3d, 0x18, 0xde, 0x6c, 0xa4, 0xdc, 0xe4, 0x62, 0x6a, 0x66, 0x4f, 0xc7, 0xe7, 0xa9, 0xca,
+ 0xf6, 0xa2, 0x52, 0xe9, 0xbe, 0x3c, 0xe9, 0xe3, 0x5f, 0x36, 0xd8, 0xf7, 0x52, 0xee, 0x28, 0x05,
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+ 0xdb, 0xa1, 0x77, 0x8a, 0xe1, 0x9d, 0x63, 0x78, 0xf1, 0x39, 0x06, 0x77, 0xb5, 0xcb, 0x8f, 0x05,
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+ 0x37, 0xff, 0xd9, 0x24, 0x30, 0xe6, 0x52, 0x8b, 0x3f, 0xf9, 0x60, 0xfd, 0xb7, 0xcb, 0x44, 0x35,
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+ 0xa0, 0xd7, 0xd0, 0x5b, 0x72, 0x4c, 0x1e, 0xe6, 0x51, 0xec, 0x87, 0x21, 0xb1, 0x28, 0x81, 0xfe,
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+ 0x68, 0xa3, 0x06, 0xf6, 0xf9, 0x8e, 0xd5, 0xf2, 0x33, 0xf7, 0x03, 0x24, 0xed, 0xe6, 0x8e, 0x33,
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+ 0x9c, 0x06, 0x75, 0x28, 0x83, 0xd7, 0x1c, 0x43, 0xf4, 0x23, 0x4c, 0x62, 0x8c, 0xe2, 0x24, 0x5a,
+ 0xcd, 0x66, 0x18, 0x45, 0xa4, 0xfb, 0xcf, 0xe4, 0x93, 0xff, 0x10, 0xae, 0x38, 0x12, 0x18, 0xbf,
+ 0x83, 0xfe, 0xcb, 0xd8, 0xf4, 0x0a, 0xba, 0xe6, 0x18, 0x06, 0x18, 0x90, 0x0b, 0x0a, 0xe0, 0x68,
+ 0x17, 0x03, 0x62, 0xdd, 0x75, 0xbf, 0xba, 0xf5, 0xef, 0x7a, 0x72, 0xcc, 0x5b, 0x7c, 0xf8, 0x13,
+ 0x00, 0x00, 0xff, 0xff, 0xb9, 0x8a, 0xe1, 0xaf, 0x89, 0x02, 0x00, 0x00,
}
diff --git a/pkg/tiller/hooks.go b/pkg/tiller/hooks.go
index 996253384..8d72f95cf 100644
--- a/pkg/tiller/hooks.go
+++ b/pkg/tiller/hooks.go
@@ -44,6 +44,12 @@ var events = map[string]release.Hook_Event{
hooks.ReleaseTestFailure: release.Hook_RELEASE_TEST_FAILURE,
}
+// deletePolices represents a mapping between the key in the annotation for label deleting policy and its real meaning
+var deletePolices = map[string]release.Hook_DeletePolicy{
+ hooks.HookSucceeded: release.Hook_SUCCEEDED,
+ hooks.HookFailed: release.Hook_FAILED,
+}
+
// manifest represents a manifest file, which has a name and some content.
type manifest struct {
name string
@@ -113,6 +119,13 @@ func sortManifests(files map[string]string, apis chartutil.VersionSet, sort Sort
// annotations:
// helm.sh/hook: pre-install
//
+// To determine the policy to delete the hook, it looks for a YAML structure like this:
+//
+// kind: SomeKind
+// apiVersion: v1
+// metadata:
+// annotations:
+// helm.sh/hook-delete-policy: hook-succeeded
func (file *manifestFile) sort(result *result) error {
for _, m := range file.entries {
var entry util.SimpleHead
@@ -149,12 +162,13 @@ func (file *manifestFile) sort(result *result) error {
hw := calculateHookWeight(entry)
h := &release.Hook{
- Name: entry.Metadata.Name,
- Kind: entry.Kind,
- Path: file.path,
- Manifest: m,
- Events: []release.Hook_Event{},
- Weight: hw,
+ Name: entry.Metadata.Name,
+ Kind: entry.Kind,
+ Path: file.path,
+ Manifest: m,
+ Events: []release.Hook_Event{},
+ Weight: hw,
+ DeletePolicies: []release.Hook_DeletePolicy{},
}
isKnownHook := false
@@ -173,6 +187,22 @@ func (file *manifestFile) sort(result *result) error {
}
result.hooks = append(result.hooks, h)
+
+ isKnownDeletePolices := false
+ dps, ok := entry.Metadata.Annotations[hooks.HookDeleteAnno]
+ if ok {
+ for _, dp := range strings.Split(dps, ",") {
+ dp = strings.ToLower(strings.TrimSpace(dp))
+ p, exist := deletePolices[dp]
+ if exist {
+ isKnownDeletePolices = true
+ h.DeletePolicies = append(h.DeletePolicies, p)
+ }
+ }
+ if !isKnownDeletePolices {
+ log.Printf("info: skipping unknown hook delete policy: %q", dps)
+ }
+ }
}
return nil
diff --git a/pkg/tiller/release_server.go b/pkg/tiller/release_server.go
index db7c0b568..bab405e1f 100644
--- a/pkg/tiller/release_server.go
+++ b/pkg/tiller/release_server.go
@@ -30,6 +30,7 @@ import (
"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
"k8s.io/helm/pkg/chartutil"
+ "k8s.io/helm/pkg/hooks"
"k8s.io/helm/pkg/proto/hapi/chart"
"k8s.io/helm/pkg/proto/hapi/release"
"k8s.io/helm/pkg/proto/hapi/services"
@@ -347,12 +348,36 @@ func (s *ReleaseServer) execHook(hs []*release.Hook, name, namespace, hook strin
b.WriteString(h.Manifest)
if err := kubeCli.WatchUntilReady(namespace, b, timeout, false); err != nil {
s.Log("warning: Release %s %s %s could not complete: %s", name, hook, h.Path, err)
+ // If a hook is failed, checkout the annotation of the hook to determine whether the hook should be deleted
+ // under failed condition. If so, then clear the corresponding resource object in the hook
+ if hookShouldBeDeleted(h, hooks.HookFailed) {
+ b.Reset()
+ b.WriteString(h.Manifest)
+ s.Log("deleting %s hook %s for release %s due to %q policy", hook, h.Name, name, hooks.HookFailed)
+ if errHookDelete := kubeCli.Delete(namespace, b); errHookDelete != nil {
+ s.Log("warning: Release %s %s %S could not be deleted: %s", name, hook, h.Path, errHookDelete)
+ return errHookDelete
+ }
+ }
return err
}
- h.LastRun = timeconv.Now()
}
s.Log("hooks complete for %s %s", hook, name)
+ // If all hooks are succeeded, checkout the annotation of each hook to determine whether the hook should be deleted
+ // under succeeded condition. If so, then clear the corresponding resource object in each hook
+ for _, h := range executingHooks {
+ b := bytes.NewBufferString(h.Manifest)
+ if hookShouldBeDeleted(h, hooks.HookSucceeded) {
+ s.Log("deleting %s hook %s for release %s due to %q policy", hook, h.Name, name, hooks.HookSucceeded)
+ if errHookDelete := kubeCli.Delete(namespace, b); errHookDelete != nil {
+ s.Log("warning: Release %s %s %S could not be deleted: %s", name, hook, h.Path, errHookDelete)
+ return errHookDelete
+ }
+ }
+ h.LastRun = timeconv.Now()
+ }
+
return nil
}
@@ -373,3 +398,16 @@ func validateReleaseName(releaseName string) error {
return nil
}
+
+// hookShouldBeDeleted determines whether the defined hook deletion policy matches the hook deletion polices
+// supported by helm. If so, mark the hook as one should be deleted.
+func hookShouldBeDeleted(hook *release.Hook, policy string) bool {
+ if dp, ok := deletePolices[policy]; ok {
+ for _, v := range hook.DeletePolicies {
+ if dp == v {
+ return true
+ }
+ }
+ }
+ return false
+}
--
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