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
This commit is contained in:
DockerZK
DoctorZK
parent
a2323f8658
commit
734b124577
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@ -35,6 +35,10 @@ message Hook {
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RELEASE_TEST_SUCCESS = 9;
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RELEASE_TEST_FAILURE = 10;
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}
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enum DeletePolicy {
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SUCCEEDED = 0;
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FAILED = 1;
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}
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string name = 1;
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// Kind is the Kubernetes kind.
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string kind = 2;
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@ -48,4 +52,6 @@ message Hook {
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google.protobuf.Timestamp last_run = 6;
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// Weight indicates the sort order for execution among similar Hook type
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int32 weight = 7;
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// DeletePolicies are the policies that indicate when to delete the hook
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repeated DeletePolicy delete_policies = 8;
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}
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@ -87,7 +87,7 @@ in the future.) It is considered good practice to add a hook weight, and set it
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to `0` if weight is not important.
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### Hook resources are unmanaged
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### Hook resources are not managed with correponding releases
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The resources that a hook creates are not tracked or managed as part of the
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release. Once Tiller verifies that the hook has reached its ready state, it
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@ -95,8 +95,8 @@ will leave the hook resource alone.
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Practically speaking, this means that if you create resources in a hook, you
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cannot rely upon `helm delete` to remove the resources. To destroy such
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resources, you need to write code to perform this operation in a `pre-delete`
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or `post-delete` hook.
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resources, you need to either write code to perform this operation in a `pre-delete`
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or `post-delete` hook or add `"helm.sh/hook-delete-policy"` annotation to the hook template file.
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## Writing a Hook
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@ -122,6 +122,7 @@ metadata:
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# job is considered part of the release.
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"helm.sh/hook": post-install
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"helm.sh/hook-weight": "-5"
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"helm/hook-delete-policy": hook-succeeded
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spec:
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template:
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metadata:
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@ -160,7 +161,7 @@ and a config map as a pre-install hook.
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When subcharts declare hooks, those are also evaluated. There is no way
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for a top-level chart to disable the hooks declared by subcharts.
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It is also possible to define a weight for a hook which will help build a
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It is possible to define a weight for a hook which will help build a
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deterministic executing order. Weights are defined using the following annotation:
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```
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@ -172,3 +173,12 @@ Hook weights can be positive or negative numbers but must be represented as
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strings. When Tiller starts the execution cycle of hooks of a particular Kind it
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will sort those hooks in ascending order.
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It is also possible to define policies that determine when to delete corresponding hook resources. Hook deletion policies are defined using the following annotation:
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```
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annotations:
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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"` 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.
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@ -26,6 +26,9 @@ const HookAnno = "helm.sh/hook"
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// HookWeightAnno is the label name for a hook weight
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const HookWeightAnno = "helm.sh/hook-weight"
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// HookDeleteAnno is the label name for the delete policy for a hook
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const HookDeleteAnno = "helm.sh/hook-delete-policy"
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// Types of hooks
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const (
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PreInstall = "pre-install"
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@ -40,6 +43,12 @@ const (
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ReleaseTestFailure = "test-failure"
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)
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// Type of policy for deleting the hook
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const (
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HookSucceeded = "hook-succeeded"
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HookFailed = "hook-failed"
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)
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// FilterTestHooks filters the list of hooks are returns only testing hooks.
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func FilterTestHooks(hooks []*release.Hook) []*release.Hook {
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testHooks := []*release.Hook{}
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@ -6,19 +6,9 @@ Package release is a generated protocol buffer package.
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It is generated from these files:
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hapi/release/hook.proto
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hapi/release/info.proto
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hapi/release/release.proto
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hapi/release/status.proto
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hapi/release/test_run.proto
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hapi/release/test_suite.proto
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It has these top-level messages:
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Hook
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Info
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Release
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Status
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TestRun
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TestSuite
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*/
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package release
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@ -86,6 +76,27 @@ func (x Hook_Event) String() string {
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}
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func (Hook_Event) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{0, 0} }
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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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)
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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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}
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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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}
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func (x Hook_DeletePolicy) String() string {
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return proto.EnumName(Hook_DeletePolicy_name, int32(x))
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}
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func (Hook_DeletePolicy) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{0, 1} }
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// Hook defines a hook object.
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type Hook struct {
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Name string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
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@ -101,6 +112,8 @@ type Hook struct {
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LastRun *google_protobuf.Timestamp `protobuf:"bytes,6,opt,name=last_run,json=lastRun" json:"last_run,omitempty"`
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// Weight indicates the sort order for execution among similar Hook type
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Weight int32 `protobuf:"varint,7,opt,name=weight" json:"weight,omitempty"`
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// DeletePolicies are the policies that indicate when to delete the hook
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DeletePolicies []Hook_DeletePolicy `protobuf:"varint,8,rep,packed,name=delete_policies,json=deletePolicies,enum=hapi.release.Hook_DeletePolicy" json:"delete_policies,omitempty"`
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}
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func (m *Hook) Reset() { *m = Hook{} }
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@ -157,37 +170,48 @@ func (m *Hook) GetWeight() int32 {
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return 0
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}
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func (m *Hook) GetDeletePolicies() []Hook_DeletePolicy {
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if m != nil {
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return m.DeletePolicies
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}
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return nil
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}
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func init() {
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proto.RegisterType((*Hook)(nil), "hapi.release.Hook")
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proto.RegisterEnum("hapi.release.Hook_Event", Hook_Event_name, Hook_Event_value)
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proto.RegisterEnum("hapi.release.Hook_DeletePolicy", Hook_DeletePolicy_name, Hook_DeletePolicy_value)
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}
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func init() { proto.RegisterFile("hapi/release/hook.proto", fileDescriptor0) }
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var fileDescriptor0 = []byte{
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// 371 bytes of a gzipped FileDescriptorProto
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0xe8, 0x14, 0x99, 0x1b, 0x3e, 0xbd, 0xf1, 0x07, 0x70, 0xc4, 0x4f, 0xd1, 0xa8, 0x8e, 0xd8, 0xde,
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0xc1, 0xe2, 0x54, 0x74, 0x2a, 0x3f, 0x5f, 0x1a, 0xe2, 0x78, 0x96, 0xbf, 0xba, 0x5b, 0xd3, 0x7e,
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0x0d, 0x3a, 0xae, 0x41, 0xd3, 0x71, 0x0d, 0xee, 0x6a, 0x97, 0x5f, 0x1a, 0xfc, 0x16, 0x9c, 0x5f,
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0xa2, 0x3a, 0x94, 0x8a, 0xb8, 0x9e, 0xe5, 0xdb, 0x7c, 0x78, 0xdd, 0xfe, 0xb1, 0xc0, 0x36, 0x03,
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0xf0, 0x0a, 0xdc, 0x2c, 0x7e, 0x8a, 0xb7, 0xdf, 0x62, 0xf4, 0x02, 0xbf, 0x82, 0xd5, 0x8e, 0xb3,
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0xfc, 0x31, 0x4e, 0xd2, 0x30, 0x8a, 0x90, 0x85, 0x11, 0x5c, 0xef, 0xb6, 0x49, 0x3a, 0x91, 0x2b,
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0x7c, 0x03, 0xa0, 0x95, 0x07, 0x16, 0xb1, 0x94, 0xa1, 0x99, 0xf9, 0x44, 0x1b, 0x03, 0x98, 0x8f,
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0xb7, 0x51, 0x74, 0x1f, 0x6e, 0x9e, 0x90, 0x8b, 0x5f, 0xc3, 0x4b, 0xe3, 0x4c, 0x68, 0x81, 0x09,
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0x02, 0x00, 0x00,
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// 428 bytes of a gzipped FileDescriptorProto
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0x9c, 0x06, 0x75, 0x28, 0x83, 0xd7, 0x1c, 0x43, 0xf4, 0x23, 0x4c, 0x62, 0x8c, 0xe2, 0x24, 0x5a,
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0xcd, 0x66, 0x18, 0x45, 0xa4, 0xfb, 0xcf, 0xe4, 0x93, 0xff, 0x10, 0xae, 0x38, 0x12, 0x18, 0xbf,
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0x83, 0xfe, 0xcb, 0xd8, 0xf4, 0x0a, 0xba, 0xe6, 0x18, 0x06, 0x18, 0x90, 0x0b, 0x0a, 0xe0, 0x68,
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0x17, 0x03, 0x62, 0xdd, 0x75, 0xbf, 0xba, 0xf5, 0xef, 0x7a, 0x72, 0xcc, 0x5b, 0x7c, 0xf8, 0x13,
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0x00, 0x00, 0xff, 0xff, 0xb9, 0x8a, 0xe1, 0xaf, 0x89, 0x02, 0x00, 0x00,
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}
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@ -44,6 +44,12 @@ var events = map[string]release.Hook_Event{
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hooks.ReleaseTestFailure: release.Hook_RELEASE_TEST_FAILURE,
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}
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// deletePolices represents a mapping between the key in the annotation for label deleting policy and its real meaning
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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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}
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// manifest represents a manifest file, which has a name and some content.
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type manifest struct {
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name string
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@ -113,6 +119,13 @@ func sortManifests(files map[string]string, apis chartutil.VersionSet, sort Sort
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// annotations:
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// helm.sh/hook: pre-install
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//
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// To determine the policy to delete the hook, it looks for a YAML structure like this:
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//
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// kind: SomeKind
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// apiVersion: v1
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// metadata:
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// annotations:
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// helm.sh/hook-delete-policy: hook-succeeded
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func (file *manifestFile) sort(result *result) error {
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for _, m := range file.entries {
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var entry util.SimpleHead
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@ -149,12 +162,13 @@ func (file *manifestFile) sort(result *result) error {
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hw := calculateHookWeight(entry)
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h := &release.Hook{
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Name: entry.Metadata.Name,
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Kind: entry.Kind,
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Path: file.path,
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Manifest: m,
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Events: []release.Hook_Event{},
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Weight: hw,
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Name: entry.Metadata.Name,
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Kind: entry.Kind,
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Path: file.path,
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Manifest: m,
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Events: []release.Hook_Event{},
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Weight: hw,
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DeletePolicies: []release.Hook_DeletePolicy{},
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}
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isKnownHook := false
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@ -173,6 +187,22 @@ func (file *manifestFile) sort(result *result) error {
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}
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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))
|
||||
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
|
||||
|
|
|
|||
|
|
@ -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
|
||||
}
|
||||
}
|
||||
|
||||
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()
|
||||
}
|
||||
|
||||
s.Log("hooks complete for %s %s", hook, name)
|
||||
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
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue