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Merge pull request #112905 from alexzielenski/kubectl-apply-csa-migration

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kubectl: `apply --server-side` managed fields migration
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Kubernetes Prow Robot 2022-11-07 17:08:21 -08:00 committed by GitHub
commit 2f837dc113
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9 changed files with 1490 additions and 59 deletions
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10
staging/src/k8s.io/client-go/util/csaupgrade/OWNERS Normal file
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@ -0,0 +1,10 @@
# See the OWNERS docs at https://go.k8s.io/owners
approvers:
- apelisse
- alexzielenski
reviewers:
- apelisse
- alexzielenski
- KnVerey
labels:
- sig/api-machinery

158
staging/src/k8s.io/client-go/util/csaupgrade/upgrade.go
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@ -18,17 +18,45 @@ package csaupgrade
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"reflect"
"k8s.io/apimachinery/pkg/api/meta"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/sets"
"sigs.k8s.io/structured-merge-diff/v4/fieldpath"
)
const csaAnnotationName = "kubectl.kubernetes.io/last-applied-configuration"
// Finds all managed fields owners of the given operation type which owns all of
// the fields in the given set
//
// If there is an error decoding one of the fieldsets for any reason, it is ignored
// and assumed not to match the query.
func FindFieldsOwners(
managedFields []metav1.ManagedFieldsEntry,
operation metav1.ManagedFieldsOperationType,
fields *fieldpath.Set,
) []metav1.ManagedFieldsEntry {
var result []metav1.ManagedFieldsEntry
for _, entry := range managedFields {
if entry.Operation != operation {
continue
}
var csaAnnotationFieldSet = fieldpath.NewSet(fieldpath.MakePathOrDie("metadata", "annotations", csaAnnotationName))
fieldSet, err := decodeManagedFieldsEntrySet(entry)
if err != nil {
continue
}
if fields.Difference(&fieldSet).Empty() {
result = append(result, entry)
}
}
return result
}
// Upgrades the Manager information for fields managed with client-side-apply (CSA)
// Prepares fields owned by `csaManager` for 'Update' operations for use now
@ -48,21 +76,107 @@ var csaAnnotationFieldSet = fieldpath.NewSet(fieldpath.MakePathOrDie("metadata",
// have changed before sending a patch.
//
// obj - Target of the operation which has been managed with CSA in the past
// csaManagerName - Name of FieldManager formerly used for `Update` operations
// ssaManagerName - Name of FieldManager formerly used for `Apply` operations
// csaManagerNames - Names of FieldManagers to merge into ssaManagerName
// ssaManagerName - Name of FieldManager to be used for `Apply` operations
func UpgradeManagedFields(
obj runtime.Object,
csaManagerName string,
csaManagerNames sets.Set[string],
ssaManagerName string,
) error {
accessor, err := meta.Accessor(obj)
if err != nil {
return fmt.Errorf("error accessing object metadata: %w", err)
return err
}
filteredManagers := accessor.GetManagedFields()
for csaManagerName := range csaManagerNames {
filteredManagers, err = upgradedManagedFields(
filteredManagers, csaManagerName, ssaManagerName)
if err != nil {
return err
}
}
// Commit changes to object
accessor.SetManagedFields(filteredManagers)
return nil
}
// Calculates a minimal JSON Patch to send to upgrade managed fields
// See `UpgradeManagedFields` for more information.
//
// obj - Target of the operation which has been managed with CSA in the past
// csaManagerNames - Names of FieldManagers to merge into ssaManagerName
// ssaManagerName - Name of FieldManager to be used for `Apply` operations
//
// Returns non-nil error if there was an error, a JSON patch, or nil bytes if
// there is no work to be done.
func UpgradeManagedFieldsPatch(
obj runtime.Object,
csaManagerNames sets.Set[string],
ssaManagerName string) ([]byte, error) {
accessor, err := meta.Accessor(obj)
if err != nil {
return nil, err
}
managedFields := accessor.GetManagedFields()
filteredManagers := accessor.GetManagedFields()
for csaManagerName := range csaManagerNames {
filteredManagers, err = upgradedManagedFields(
filteredManagers, csaManagerName, ssaManagerName)
if err != nil {
return nil, err
}
}
if reflect.DeepEqual(managedFields, filteredManagers) {
// If the managed fields have not changed from the transformed version,
// there is no patch to perform
return nil, nil
}
// Create a patch with a diff between old and new objects.
// Just include all managed fields since that is only thing that will change
//
// Also include test for RV to avoid race condition
jsonPatch := []map[string]interface{}{
{
"op": "replace",
"path": "/metadata/managedFields",
"value": filteredManagers,
},
{
// Use "replace" instead of "test" operation so that etcd rejects with
// 409 conflict instead of apiserver with an invalid request
"op": "replace",
"path": "/metadata/resourceVersion",
"value": accessor.GetResourceVersion(),
},
}
return json.Marshal(jsonPatch)
}
// Returns a copy of the provided managed fields that has been migrated from
// client-side-apply to server-side-apply, or an error if there was an issue
func upgradedManagedFields(
managedFields []metav1.ManagedFieldsEntry,
csaManagerName string,
ssaManagerName string,
) ([]metav1.ManagedFieldsEntry, error) {
if managedFields == nil {
return nil, nil
}
// Create managed fields clone since we modify the values
var managedFields []metav1.ManagedFieldsEntry
managedFields = append(managedFields, accessor.GetManagedFields()...)
managedFieldsCopy := make([]metav1.ManagedFieldsEntry, len(managedFields))
if copy(managedFieldsCopy, managedFields) != len(managedFields) {
return nil, errors.New("failed to copy managed fields")
}
managedFields = managedFieldsCopy
// Locate SSA manager
replaceIndex, managerExists := findFirstIndex(managedFields,
@ -88,16 +202,16 @@ func UpgradeManagedFields(
if !managerExists {
// There are no CSA managers that need to be converted. Nothing to do
// Return early
return nil
return managedFields, nil
}
// Convert CSA manager into SSA manager
managedFields[replaceIndex].Operation = metav1.ManagedFieldsOperationApply
managedFields[replaceIndex].Manager = ssaManagerName
}
err = unionManagerIntoIndex(managedFields, replaceIndex, csaManagerName)
err := unionManagerIntoIndex(managedFields, replaceIndex, csaManagerName)
if err != nil {
return err
return nil, err
}
// Create version of managed fields which has no CSA managers with the given name
@ -107,21 +221,17 @@ func UpgradeManagedFields(
entry.Subresource == "")
})
// Wipe out last-applied-configuration annotation if it exists
annotations := accessor.GetAnnotations()
delete(annotations, csaAnnotationName)
// Commit changes to object
accessor.SetAnnotations(annotations)
accessor.SetManagedFields(filteredManagers)
return nil
return filteredManagers, nil
}
// Locates an Update manager entry named `csaManagerName` with the same APIVersion
// as the manager at the targetIndex. Unions both manager's fields together
// into the manager specified by `targetIndex`. No other managers are modified.
func unionManagerIntoIndex(entries []metav1.ManagedFieldsEntry, targetIndex int, csaManagerName string) error {
func unionManagerIntoIndex(
entries []metav1.ManagedFieldsEntry,
targetIndex int,
csaManagerName string,
) error {
ssaManager := entries[targetIndex]
// find Update manager of same APIVersion, union ssa fields with it.
@ -130,6 +240,8 @@ func unionManagerIntoIndex(entries []metav1.ManagedFieldsEntry, targetIndex int,
func(entry metav1.ManagedFieldsEntry) bool {
return entry.Manager == csaManagerName &&
entry.Operation == metav1.ManagedFieldsOperationUpdate &&
//!TODO: some users may want to migrate subresources.
// should thread through the args at some point.
entry.Subresource == "" &&
entry.APIVersion == ssaManager.APIVersion
})
@ -154,10 +266,6 @@ func unionManagerIntoIndex(entries []metav1.ManagedFieldsEntry, targetIndex int,
combinedFieldSet = combinedFieldSet.Union(&csaFieldSet)
}
// Ensure that the resultant fieldset does not include the
// last applied annotation
combinedFieldSet = combinedFieldSet.Difference(csaAnnotationFieldSet)
// Encode the fields back to the serialized format
err = encodeManagedFieldsEntrySet(&entries[targetIndex], *combinedFieldSet)
if err != nil {

736
staging/src/k8s.io/client-go/util/csaupgrade/upgrade_test.go
View File

@ -17,20 +17,282 @@ limitations under the License.
package csaupgrade_test
import (
"encoding/json"
"reflect"
"testing"
jsonpatch "github.com/evanphx/json-patch"
"github.com/google/go-cmp/cmp"
"github.com/stretchr/testify/require"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/util/yaml"
"k8s.io/client-go/util/csaupgrade"
"sigs.k8s.io/structured-merge-diff/v4/fieldpath"
)
func TestFindOwners(t *testing.T) {
testCases := []struct {
Name string
ManagedFieldsYAML string
Operation metav1.ManagedFieldsOperationType
Fields *fieldpath.Set
Expectation []string
}{
{
// Field a root field path owner
Name: "Basic",
ManagedFieldsYAML: `
managedFields:
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:data:
.: {}
f:key: {}
f:legacy: {}
f:metadata:
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
manager: kubectl-client-side-apply
operation: Update
time: "2022-08-22T23:08:23Z"
`,
Operation: metav1.ManagedFieldsOperationUpdate,
Fields: fieldpath.NewSet(fieldpath.MakePathOrDie("data")),
Expectation: []string{"kubectl-client-side-apply"},
},
{
// Find a fieldpath nested inside another field
Name: "Nested",
ManagedFieldsYAML: `
managedFields:
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:data:
.: {}
f:key: {}
f:legacy: {}
f:metadata:
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
manager: kubectl-client-side-apply
operation: Update
time: "2022-08-22T23:08:23Z"
`,
Operation: metav1.ManagedFieldsOperationUpdate,
Fields: fieldpath.NewSet(fieldpath.MakePathOrDie("metadata", "annotations", "kubectl.kubernetes.io/last-applied-configuration")),
Expectation: []string{"kubectl-client-side-apply"},
},
{
// Search for an operaiton/fieldpath combination that is not found on both
// axes
Name: "NotFound",
ManagedFieldsYAML: `
managedFields:
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:data:
.: {}
f:key: {}
f:legacy: {}
f:metadata:
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
manager: kubectl
operation: Apply
time: "2022-08-23T23:08:23Z"
`,
Operation: metav1.ManagedFieldsOperationUpdate,
Fields: fieldpath.NewSet(fieldpath.MakePathOrDie("metadata", "annotations", "kubectl.kubernetes.io/last-applied-configuration")),
Expectation: []string{},
},
{
// Test using apply operation
Name: "ApplyOperation",
ManagedFieldsYAML: `
managedFields:
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:data:
.: {}
f:key: {}
f:legacy: {}
f:metadata:
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
manager: kubectl
operation: Apply
time: "2022-08-23T23:08:23Z"
`,
Operation: metav1.ManagedFieldsOperationApply,
Fields: fieldpath.NewSet(fieldpath.MakePathOrDie("metadata", "annotations", "kubectl.kubernetes.io/last-applied-configuration")),
Expectation: []string{"kubectl"},
},
{
// Of multiple field managers, match a single one
Name: "OneOfMultiple",
ManagedFieldsYAML: `
managedFields:
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:metadata:
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
manager: kubectl-client-side-apply
operation: Update
time: "2022-08-23T23:08:23Z"
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:data:
.: {}
f:key: {}
f:legacy: {}
manager: kubectl
operation: Apply
time: "2022-08-23T23:08:23Z"
`,
Operation: metav1.ManagedFieldsOperationUpdate,
Fields: fieldpath.NewSet(fieldpath.MakePathOrDie("metadata", "annotations", "kubectl.kubernetes.io/last-applied-configuration")),
Expectation: []string{"kubectl-client-side-apply"},
},
{
// have multiple field managers, and match more than one but not all of them
Name: "ManyOfMultiple",
ManagedFieldsYAML: `
managedFields:
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:metadata:
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
manager: kubectl-client-side-apply
operation: Update
time: "2022-08-23T23:08:23Z"
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:metadata:
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
f:data:
.: {}
f:key: {}
f:legacy: {}
manager: kubectl
operation: Apply
time: "2022-08-23T23:08:23Z"
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:metadata:
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
manager: kubectl-client-side-apply2
operation: Update
time: "2022-08-23T23:08:23Z"
`,
Operation: metav1.ManagedFieldsOperationUpdate,
Fields: fieldpath.NewSet(fieldpath.MakePathOrDie("metadata", "annotations", "kubectl.kubernetes.io/last-applied-configuration")),
Expectation: []string{"kubectl-client-side-apply", "kubectl-client-side-apply2"},
},
{
// Test with multiple fields to match against
Name: "BasicMultipleFields",
ManagedFieldsYAML: `
managedFields:
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:metadata:
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
f:data:
.: {}
f:key: {}
f:legacy: {}
manager: kubectl-client-side-apply
operation: Update
time: "2022-08-23T23:08:23Z"
`,
Operation: metav1.ManagedFieldsOperationUpdate,
Fields: fieldpath.NewSet(
fieldpath.MakePathOrDie("data", "key"),
fieldpath.MakePathOrDie("metadata", "annotations", "kubectl.kubernetes.io/last-applied-configuration"),
),
Expectation: []string{"kubectl-client-side-apply"},
},
{
// Test with multiplle fields but the manager is missing one of the fields
// requested so it does not match
Name: "MissingOneField",
ManagedFieldsYAML: `
managedFields:
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:metadata:
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
f:data:
.: {}
f:legacy: {}
manager: kubectl-client-side-apply
operation: Update
time: "2022-08-23T23:08:23Z"
`,
Operation: metav1.ManagedFieldsOperationUpdate,
Fields: fieldpath.NewSet(
fieldpath.MakePathOrDie("data", "key"),
fieldpath.MakePathOrDie("metadata", "annotations", "kubectl.kubernetes.io/last-applied-configuration"),
),
Expectation: []string{},
},
}
for _, tcase := range testCases {
t.Run(tcase.Name, func(t *testing.T) {
var entries struct {
ManagedFields []metav1.ManagedFieldsEntry `json:"managedFields"`
}
err := yaml.Unmarshal([]byte(tcase.ManagedFieldsYAML), &entries)
require.NoError(t, err)
result := csaupgrade.FindFieldsOwners(entries.ManagedFields, tcase.Operation, tcase.Fields)
// Compare owner names since they uniquely identify the selected entries
// (given that the operation is provided)
ownerNames := []string{}
for _, entry := range result {
ownerNames = append(ownerNames, entry.Manager)
require.Equal(t, tcase.Operation, entry.Operation)
}
require.ElementsMatch(t, tcase.Expectation, ownerNames)
})
}
}
func TestUpgradeCSA(t *testing.T) {
cases := []struct {
Name string
CSAManager string
CSAManagers []string
SSAManager string
OriginalObject []byte
ExpectedObject []byte
@ -39,14 +301,15 @@ func TestUpgradeCSA(t *testing.T) {
// Case where there is a CSA entry with the given name, but no SSA entry
// is found. Expect that the CSA entry is converted to an SSA entry
// and renamed.
Name: "csa-basic-direct-conversion",
CSAManager: "kubectl-client-side-apply",
SSAManager: "kubectl",
Name: "csa-basic-direct-conversion",
CSAManagers: []string{"kubectl-client-side-apply"},
SSAManager: "kubectl",
OriginalObject: []byte(`
apiVersion: v1
data: {}
kind: ConfigMap
metadata:
resourceVersion: "1"
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","data":{"key":"value","legacy":"unused"},"kind":"ConfigMap","metadata":{"annotations":{},"name":"test","namespace":"default"}}
@ -74,7 +337,10 @@ apiVersion: v1
data: {}
kind: ConfigMap
metadata:
annotations: {}
resourceVersion: "1"
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","data":{"key":"value","legacy":"unused"},"kind":"ConfigMap","metadata":{"annotations":{},"name":"test","namespace":"default"}}
creationTimestamp: "2022-08-22T23:08:23Z"
managedFields:
- apiVersion: v1
@ -85,12 +351,14 @@ metadata:
f:key: {}
f:legacy: {}
f:metadata:
f:annotations: {}
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
manager: kubectl
operation: Apply
time: "2022-08-22T23:08:23Z"
name: test
namespace: default
namespace: default
`),
},
{
@ -98,14 +366,15 @@ metadata:
// Server creates duplicate managed fields entry - one for Update and another
// for Apply. Expect entries to be merged into one entry, which is unchanged
// from initial SSA.
Name: "csa-combine-with-ssa-duplicate-keys",
CSAManager: "kubectl-client-side-apply",
SSAManager: "kubectl",
Name: "csa-combine-with-ssa-duplicate-keys",
CSAManagers: []string{"kubectl-client-side-apply"},
SSAManager: "kubectl",
OriginalObject: []byte(`
apiVersion: v1
data: {}
kind: ConfigMap
metadata:
resourceVersion: "1"
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","data":{"key":"value","legacy":"unused"},"kind":"ConfigMap","metadata":{"annotations":{},"name":"test","namespace":"default"}}
@ -147,7 +416,10 @@ apiVersion: v1
data: {}
kind: ConfigMap
metadata:
annotations: {}
resourceVersion: "1"
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","data":{"key":"value","legacy":"unused"},"kind":"ConfigMap","metadata":{"annotations":{},"name":"test","namespace":"default"}}
creationTimestamp: "2022-08-22T23:08:23Z"
managedFields:
- apiVersion: v1
@ -158,12 +430,14 @@ metadata:
f:key: {}
f:legacy: {}
f:metadata:
f:annotations: {}
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
manager: kubectl
operation: Apply
time: "2022-08-23T23:08:23Z"
name: test
namespace: default
namespace: default
`),
},
{
@ -173,14 +447,15 @@ metadata:
// This shows that upgrading such an object results in correct behavior next
// time SSA applier
// Expect final object to have unioned keys from both entries
Name: "csa-combine-with-ssa-additional-keys",
CSAManager: "kubectl-client-side-apply",
SSAManager: "kubectl",
Name: "csa-combine-with-ssa-additional-keys",
CSAManagers: []string{"kubectl-client-side-apply"},
SSAManager: "kubectl",
OriginalObject: []byte(`
apiVersion: v1
data: {}
kind: ConfigMap
metadata:
resourceVersion: "1"
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","data":{"key":"value","legacy":"unused"},"kind":"ConfigMap","metadata":{"annotations":{},"name":"test","namespace":"default"}}
@ -221,7 +496,10 @@ apiVersion: v1
data: {}
kind: ConfigMap
metadata:
annotations: {}
resourceVersion: "1"
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","data":{"key":"value","legacy":"unused"},"kind":"ConfigMap","metadata":{"annotations":{},"name":"test","namespace":"default"}}
creationTimestamp: "2022-08-22T23:08:23Z"
managedFields:
- apiVersion: v1
@ -232,26 +510,29 @@ metadata:
f:key: {}
f:legacy: {}
f:metadata:
f:annotations: {}
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
manager: kubectl
operation: Apply
time: "2022-08-23T23:08:23Z"
name: test
namespace: default
namespace: default
`),
},
{
// Case when there are multiple CSA versions on the object which do not
// match the version from the apply entry. Shows they are tossed away
// without being merged.
Name: "csa-no-applicable-version",
CSAManager: "kubectl-client-side-apply",
SSAManager: "kubectl",
Name: "csa-no-applicable-version",
CSAManagers: []string{"kubectl-client-side-apply"},
SSAManager: "kubectl",
OriginalObject: []byte(`
apiVersion: v1
data: {}
kind: ConfigMap
metadata:
resourceVersion: "1"
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","data":{"key":"value","legacy":"unused"},"kind":"ConfigMap","metadata":{"annotations":{},"name":"test","namespace":"default"}}
@ -323,7 +604,10 @@ apiVersion: v1
data: {}
kind: ConfigMap
metadata:
annotations: {}
resourceVersion: "1"
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","data":{"key":"value","legacy":"unused"},"kind":"ConfigMap","metadata":{"annotations":{},"name":"test","namespace":"default"}}
creationTimestamp: "2022-08-22T23:08:23Z"
managedFields:
- apiVersion: v5
@ -334,26 +618,29 @@ metadata:
f:key: {}
f:legacy: {}
f:metadata:
f:annotations: {}
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
manager: kubectl
operation: Apply
time: "2022-08-23T23:08:23Z"
name: test
namespace: default
namespace: default
`),
},
{
// Case when there are multiple CSA versions on the object which do not
// match the version from the apply entry, and one which does.
// Shows that CSA entry with matching version is unioned into the SSA entry.
Name: "csa-single-applicable-version",
CSAManager: "kubectl-client-side-apply",
SSAManager: "kubectl",
Name: "csa-single-applicable-version",
CSAManagers: []string{"kubectl-client-side-apply"},
SSAManager: "kubectl",
OriginalObject: []byte(`
apiVersion: v1
data: {}
kind: ConfigMap
metadata:
resourceVersion: "1"
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","data":{"key":"value","legacy":"unused"},"kind":"ConfigMap","metadata":{"annotations":{},"name":"test","namespace":"default"}}
@ -425,7 +712,10 @@ apiVersion: v1
data: {}
kind: ConfigMap
metadata:
annotations: {}
resourceVersion: "1"
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","data":{"key":"value","legacy":"unused"},"kind":"ConfigMap","metadata":{"annotations":{},"name":"test","namespace":"default"}}
creationTimestamp: "2022-08-22T23:08:23Z"
managedFields:
- apiVersion: v5
@ -440,11 +730,355 @@ metadata:
f:annotations:
.: {}
f:hello2: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
manager: kubectl
operation: Apply
time: "2022-08-23T23:08:23Z"
name: test
namespace: default
namespace: default
`),
},
{
// Do nothing to object with nothing to migrate and no existing SSA manager
Name: "noop",
CSAManagers: []string{"kubectl-client-side-apply"},
SSAManager: "not-already-in-object",
OriginalObject: []byte(`
apiVersion: v1
data: {}
kind: ConfigMap
metadata:
resourceVersion: "1"
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","data":{"key":"value","legacy":"unused"},"kind":"ConfigMap","metadata":{"annotations":{},"name":"test","namespace":"default"}}
creationTimestamp: "2022-08-22T23:08:23Z"
managedFields:
- apiVersion: v5
fieldsType: FieldsV1
fieldsV1:
f:data:
.: {}
f:key: {}
f:legacy: {}
f:metadata:
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
manager: kubectl
operation: Apply
time: "2022-08-23T23:08:23Z"
name: test
namespace: default
`),
ExpectedObject: []byte(`
apiVersion: v1
data: {}
kind: ConfigMap
metadata:
resourceVersion: "1"
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","data":{"key":"value","legacy":"unused"},"kind":"ConfigMap","metadata":{"annotations":{},"name":"test","namespace":"default"}}
creationTimestamp: "2022-08-22T23:08:23Z"
managedFields:
- apiVersion: v5
fieldsType: FieldsV1
fieldsV1:
f:data:
.: {}
f:key: {}
f:legacy: {}
f:metadata:
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
manager: kubectl
operation: Apply
time: "2022-08-23T23:08:23Z"
name: test
namespace: default
`),
},
{
// Expect multiple targets to be merged into existing ssa manager
Name: "multipleTargetsExisting",
CSAManagers: []string{"kube-scheduler", "kubectl-client-side-apply"},
SSAManager: "kubectl",
OriginalObject: []byte(`
apiVersion: v1
data: {}
kind: ConfigMap
metadata:
resourceVersion: "1"
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","data":{"key":"value","legacy":"unused"},"kind":"ConfigMap","metadata":{"annotations":{},"name":"test","namespace":"default"}}
creationTimestamp: "2022-08-22T23:08:23Z"
managedFields:
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:metadata:
f:labels:
f:name: {}
f:spec:
f:containers:
k:{"name":"kubernetes-pause"}:
.: {}
f:image: {}
f:name: {}
manager: kubectl
operation: Apply
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:status:
f:conditions:
.: {}
k:{"type":"PodScheduled"}:
.: {}
f:lastProbeTime: {}
f:lastTransitionTime: {}
f:message: {}
f:reason: {}
f:status: {}
f:type: {}
manager: kube-scheduler
operation: Update
time: "2022-11-03T23:22:40Z"
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:metadata:
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
f:labels:
.: {}
f:name: {}
f:spec:
f:containers:
k:{"name":"kubernetes-pause"}:
.: {}
f:image: {}
f:imagePullPolicy: {}
f:name: {}
f:resources: {}
f:terminationMessagePath: {}
f:terminationMessagePolicy: {}
f:dnsPolicy: {}
f:enableServiceLinks: {}
f:restartPolicy: {}
f:schedulerName: {}
f:securityContext: {}
f:terminationGracePeriodSeconds: {}
manager: kubectl-client-side-apply
operation: Update
time: "2022-11-03T23:22:40Z"
name: test
namespace: default
`),
ExpectedObject: []byte(`
apiVersion: v1
data: {}
kind: ConfigMap
metadata:
resourceVersion: "1"
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","data":{"key":"value","legacy":"unused"},"kind":"ConfigMap","metadata":{"annotations":{},"name":"test","namespace":"default"}}
creationTimestamp: "2022-08-22T23:08:23Z"
managedFields:
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:status:
f:conditions:
.: {}
k:{"type":"PodScheduled"}:
.: {}
f:lastProbeTime: {}
f:lastTransitionTime: {}
f:message: {}
f:reason: {}
f:status: {}
f:type: {}
f:metadata:
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
f:labels:
.: {}
f:name: {}
f:spec:
f:containers:
k:{"name":"kubernetes-pause"}:
.: {}
f:image: {}
f:imagePullPolicy: {}
f:name: {}
f:resources: {}
f:terminationMessagePath: {}
f:terminationMessagePolicy: {}
f:dnsPolicy: {}
f:enableServiceLinks: {}
f:restartPolicy: {}
f:schedulerName: {}
f:securityContext: {}
f:terminationGracePeriodSeconds: {}
manager: kubectl
operation: Apply
name: test
namespace: default
`),
},
{
// Expect multiple targets to be merged into a new ssa manager
Name: "multipleTargetsNewInsertion",
CSAManagers: []string{"kubectl-client-side-apply", "kube-scheduler"},
SSAManager: "newly-inserted-manager",
OriginalObject: []byte(`
apiVersion: v1
data: {}
kind: ConfigMap
metadata:
resourceVersion: "1"
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","data":{"key":"value","legacy":"unused"},"kind":"ConfigMap","metadata":{"annotations":{},"name":"test","namespace":"default"}}
creationTimestamp: "2022-08-22T23:08:23Z"
managedFields:
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:metadata:
f:labels:
f:name: {}
f:spec:
f:containers:
k:{"name":"kubernetes-pause"}:
.: {}
f:image: {}
f:name: {}
manager: kubectl
operation: Apply
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:status:
f:conditions:
.: {}
k:{"type":"PodScheduled"}:
.: {}
f:lastProbeTime: {}
f:lastTransitionTime: {}
f:message: {}
f:reason: {}
f:status: {}
f:type: {}
manager: kube-scheduler
operation: Update
time: "2022-11-03T23:22:40Z"
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:metadata:
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
f:labels:
.: {}
f:name: {}
f:spec:
f:containers:
k:{"name":"kubernetes-pause"}:
.: {}
f:image: {}
f:imagePullPolicy: {}
f:name: {}
f:resources: {}
f:terminationMessagePath: {}
f:terminationMessagePolicy: {}
f:dnsPolicy: {}
f:enableServiceLinks: {}
f:restartPolicy: {}
f:schedulerName: {}
f:securityContext: {}
f:terminationGracePeriodSeconds: {}
manager: kubectl-client-side-apply
operation: Update
time: "2022-11-03T23:22:40Z"
name: test
namespace: default
`),
ExpectedObject: []byte(`
apiVersion: v1
data: {}
kind: ConfigMap
metadata:
resourceVersion: "1"
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","data":{"key":"value","legacy":"unused"},"kind":"ConfigMap","metadata":{"annotations":{},"name":"test","namespace":"default"}}
creationTimestamp: "2022-08-22T23:08:23Z"
managedFields:
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:metadata:
f:labels:
f:name: {}
f:spec:
f:containers:
k:{"name":"kubernetes-pause"}:
.: {}
f:image: {}
f:name: {}
manager: kubectl
operation: Apply
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:metadata:
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
f:labels:
.: {}
f:name: {}
f:spec:
f:containers:
k:{"name":"kubernetes-pause"}:
.: {}
f:image: {}
f:imagePullPolicy: {}
f:name: {}
f:resources: {}
f:terminationMessagePath: {}
f:terminationMessagePolicy: {}
f:dnsPolicy: {}
f:enableServiceLinks: {}
f:restartPolicy: {}
f:schedulerName: {}
f:securityContext: {}
f:terminationGracePeriodSeconds: {}
f:status:
f:conditions:
.: {}
k:{"type":"PodScheduled"}:
.: {}
f:lastProbeTime: {}
f:lastTransitionTime: {}
f:message: {}
f:reason: {}
f:status: {}
f:type: {}
manager: newly-inserted-manager
operation: Apply
time: "2022-11-03T23:22:40Z"
name: test
namespace: default
`),
},
}
@ -452,7 +1086,7 @@ metadata:
for _, testCase := range cases {
t.Run(testCase.Name, func(t *testing.T) {
initialObject := unstructured.Unstructured{}
err := yaml.Unmarshal(testCase.OriginalObject, &initialObject)
err := yaml.Unmarshal(testCase.OriginalObject, &initialObject.Object)
if err != nil {
t.Fatal(err)
}
@ -460,7 +1094,7 @@ metadata:
upgraded := initialObject.DeepCopy()
err = csaupgrade.UpgradeManagedFields(
upgraded,
testCase.CSAManager,
sets.New(testCase.CSAManagers...),
testCase.SSAManager,
)
@ -469,7 +1103,7 @@ metadata:
}
expectedObject := unstructured.Unstructured{}
err = yaml.Unmarshal(testCase.ExpectedObject, &expectedObject)
err = yaml.Unmarshal(testCase.ExpectedObject, &expectedObject.Object)
if err != nil {
t.Fatal(err)
}
@ -477,6 +1111,42 @@ metadata:
if !reflect.DeepEqual(&expectedObject, upgraded) {
t.Fatal(cmp.Diff(&expectedObject, upgraded))
}
// Show that the UpgradeManagedFieldsPatch yields a patch that does
// nothing more and nothing less than make the object equal to output
// of UpgradeManagedFields
initialCopy := initialObject.DeepCopyObject()
patchBytes, err := csaupgrade.UpgradeManagedFieldsPatch(
initialCopy, sets.New(testCase.CSAManagers...), testCase.SSAManager)
if err != nil {
t.Fatal(err)
} else if patchBytes != nil {
patch, err := jsonpatch.DecodePatch(patchBytes)
if err != nil {
t.Fatal(err)
}
initialJSON, err := json.Marshal(initialObject.Object)
if err != nil {
t.Fatal(err)
}
patchedBytes, err := patch.Apply(initialJSON)
if err != nil {
t.Fatal(err)
}
var patched unstructured.Unstructured
if err := json.Unmarshal(patchedBytes, &patched.Object); err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(&patched, upgraded) {
t.Fatalf("expected patch to produce an upgraded object: %v", cmp.Diff(patched, upgraded))
}
}
})
}
}

2
staging/src/k8s.io/kubectl/go.mod
View File

@ -43,6 +43,7 @@ require (
sigs.k8s.io/json v0.0.0-20220713155537-f223a00ba0e2
sigs.k8s.io/kustomize/kustomize/v4 v4.5.7
sigs.k8s.io/kustomize/kyaml v0.13.9
sigs.k8s.io/structured-merge-diff/v4 v4.2.3
sigs.k8s.io/yaml v1.3.0
)
@ -87,7 +88,6 @@ require (
gopkg.in/inf.v0 v0.9.1 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
sigs.k8s.io/kustomize/api v0.12.1 // indirect
sigs.k8s.io/structured-merge-diff/v4 v4.2.3 // indirect
)
replace (

226
staging/src/k8s.io/kubectl/pkg/cmd/apply/apply.go
View File

@ -22,6 +22,7 @@ import (
"net/http"
"github.com/spf13/cobra"
"sigs.k8s.io/structured-merge-diff/v4/fieldpath"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
@ -36,6 +37,7 @@ import (
"k8s.io/cli-runtime/pkg/printers"
"k8s.io/cli-runtime/pkg/resource"
"k8s.io/client-go/dynamic"
"k8s.io/client-go/util/csaupgrade"
"k8s.io/klog/v2"
"k8s.io/kubectl/pkg/cmd/delete"
cmdutil "k8s.io/kubectl/pkg/cmd/util"
@ -163,6 +165,9 @@ var (
warningNoLastAppliedConfigAnnotation = "Warning: resource %[1]s is missing the %[2]s annotation which is required by %[3]s apply. %[3]s apply should only be used on resources created declaratively by either %[3]s create --save-config or %[3]s apply. The missing annotation will be patched automatically.\n"
warningChangesOnDeletingResource = "Warning: Detected changes to resource %[1]s which is currently being deleted.\n"
warningMigrationLastAppliedFailed = "Warning: failed to migrate kubectl.kubernetes.io/last-applied-configuration for Server-Side Apply. This is non-fatal and will be retried next time you apply. Error: %[1]s\n"
warningMigrationPatchFailed = "Warning: server rejected managed fields migration to Server-Side Apply. This is non-fatal and will be retried next time you apply. Error: %[1]s\n"
warningMigrationReapplyFailed = "Warning: failed to re-apply configuration after performing Server-Side Apply migration. This is non-fatal and will be retried next time you apply. Error: %[1]s\n"
)
// NewApplyFlags returns a default ApplyFlags
@ -542,6 +547,40 @@ See https://kubernetes.io/docs/reference/using-api/server-side-apply/#conflicts`
info.Refresh(obj, true)
// Migrate managed fields if necessary.
//
// By checking afterward instead of fetching the object beforehand and
// unconditionally fetching we can make 3 network requests in the rare
// case of migration and 1 request if migration is unnecessary.
//
// To check beforehand means 2 requests for most operations, and 3
// requests in worst case.
if err = o.saveLastApplyAnnotationIfNecessary(helper, info); err != nil {
fmt.Fprintf(o.ErrOut, warningMigrationLastAppliedFailed, err.Error())
} else if performedMigration, err := o.migrateToSSAIfNecessary(helper, info); err != nil {
// Print-error as a warning.
// This is a non-fatal error because object was successfully applied
// above, but it might have issues since migration failed.
//
// This migration will be re-attempted if necessary upon next
// apply.
fmt.Fprintf(o.ErrOut, warningMigrationPatchFailed, err.Error())
} else if performedMigration {
if obj, err = helper.Patch(
info.Namespace,
info.Name,
types.ApplyPatchType,
data,
&options,
); err != nil {
// Re-send original SSA patch (this will allow dropped fields to
// finally be removed)
fmt.Fprintf(o.ErrOut, warningMigrationReapplyFailed, err.Error())
} else {
info.Refresh(obj, false)
}
}
WarnIfDeleting(info.Object, o.ErrOut)
if err := o.MarkObjectVisited(info); err != nil {
@ -660,6 +699,183 @@ See https://kubernetes.io/docs/reference/using-api/server-side-apply/#conflicts`
return nil
}
// Saves the last-applied-configuration annotation in a separate SSA field manager
// to prevent it from being dropped by users who have transitioned to SSA.
//
// If this operation is not performed, then the last-applied-configuration annotation
// would be removed from the object upon the first SSA usage. We want to keep it
// around for a few releases since it is required to downgrade to
// SSA per [1] and [2]. This code should be removed once the annotation is
// deprecated.
//
// - [1] https://kubernetes.io/docs/reference/using-api/server-side-apply/#downgrading-from-server-side-apply-to-client-side-apply
// - [2] https://github.com/kubernetes/kubernetes/pull/90187
//
// If the annotation is not already present, or if it is already managed by the
// separate SSA fieldmanager, this is a no-op.
func (o *ApplyOptions) saveLastApplyAnnotationIfNecessary(
helper *resource.Helper,
info *resource.Info,
) error {
if o.FieldManager != fieldManagerServerSideApply {
// There is no point in preserving the annotation if the field manager
// will not remain default. This is because the server will not keep
// the annotation up to date.
return nil
}
// Send an apply patch with the last-applied-annotation
// so that it is not orphaned by SSA in the following patch:
accessor, err := meta.Accessor(info.Object)
if err != nil {
return err
}
// Get the current annotations from the object.
annots := accessor.GetAnnotations()
if annots == nil {
annots = map[string]string{}
}
fieldManager := fieldManagerLastAppliedAnnotation
originalAnnotation, hasAnnotation := annots[corev1.LastAppliedConfigAnnotation]
// If the annotation does not already exist, we do not do anything
if !hasAnnotation {
return nil
}
// If there is already an SSA field manager which owns the field, then there
// is nothing to do here.
if owners := csaupgrade.FindFieldsOwners(
accessor.GetManagedFields(),
metav1.ManagedFieldsOperationApply,
lastAppliedAnnotationFieldPath,
); len(owners) > 0 {
return nil
}
justAnnotation := &unstructured.Unstructured{}
justAnnotation.SetGroupVersionKind(info.Mapping.GroupVersionKind)
justAnnotation.SetName(accessor.GetName())
justAnnotation.SetNamespace(accessor.GetNamespace())
justAnnotation.SetAnnotations(map[string]string{
corev1.LastAppliedConfigAnnotation: originalAnnotation,
})
modified, err := runtime.Encode(unstructured.UnstructuredJSONScheme, justAnnotation)
if err != nil {
return nil
}
helperCopy := *helper
newObj, err := helperCopy.WithFieldManager(fieldManager).Patch(
info.Namespace,
info.Name,
types.ApplyPatchType,
modified,
nil,
)
if err != nil {
return err
}
return info.Refresh(newObj, false)
}
// Check if the returned object needs to have its kubectl-client-side-apply
// managed fields migrated server-side-apply.
//
// field ownership metadata is stored in three places:
// - server-side managed fields
// - client-side managed fields
// - and the last_applied_configuration annotation.
//
// The migration merges the client-side-managed fields into the
// server-side-managed fields, leaving the last_applied_configuration
// annotation in place. Server will keep the annotation up to date
// after every server-side-apply where the following conditions are ment:
//
// 1. field manager is 'kubectl'
// 2. annotation already exists
func (o *ApplyOptions) migrateToSSAIfNecessary(
helper *resource.Helper,
info *resource.Info,
) (migrated bool, err error) {
accessor, err := meta.Accessor(info.Object)
if err != nil {
return false, err
}
// To determine which field managers were used by kubectl for client-side-apply
// we search for a manager used in `Update` operations which owns the
// last-applied-annotation.
//
// This is the last client-side-apply manager which changed the field.
//
// There may be multiple owners if multiple managers wrote the same exact
// configuration. In this case there are multiple owners, we want to migrate
// them all.
csaManagers := csaupgrade.FindFieldsOwners(
accessor.GetManagedFields(),
metav1.ManagedFieldsOperationUpdate,
lastAppliedAnnotationFieldPath)
managerNames := sets.New[string]()
for _, entry := range csaManagers {
managerNames.Insert(entry.Manager)
}
// Re-attempt patch as many times as it is conflicting due to ResourceVersion
// test failing
for i := 0; i < maxPatchRetry; i++ {
var patchData []byte
var obj runtime.Object
patchData, err = csaupgrade.UpgradeManagedFieldsPatch(
info.Object, managerNames, o.FieldManager)
if err != nil {
// If patch generation failed there was likely a bug.
return false, err
} else if patchData == nil {
// nil patch data means nothing to do - object is already migrated
return false, nil
}
// Send the patch to upgrade the managed fields if it is non-nil
obj, err = helper.Patch(
info.Namespace,
info.Name,
types.JSONPatchType,
patchData,
nil,
)
if err == nil {
// Stop retrying upon success.
info.Refresh(obj, false)
return true, nil
} else if !errors.IsConflict(err) {
// Only retry if there was a conflict
return false, err
}
// Refresh the object for next iteration
err = info.Get()
if err != nil {
// If there was an error fetching, return error
return false, err
}
}
// Reaching this point with non-nil error means there was a conflict and
// max retries was hit
// Return the last error witnessed (which will be a conflict)
return false, err
}
func (o *ApplyOptions) shouldPrintObject() bool {
// Print object only if output format other than "name" is specified
shouldPrint := false
@ -766,6 +982,16 @@ const (
// for backward compatibility to not conflict with old versions
// of kubectl server-side apply where `kubectl` has already been the field manager.
fieldManagerServerSideApply = "kubectl"
fieldManagerLastAppliedAnnotation = "kubectl-last-applied"
)
var (
lastAppliedAnnotationFieldPath = fieldpath.NewSet(
fieldpath.MakePathOrDie(
"metadata", "annotations",
corev1.LastAppliedConfigAnnotation),
)
)
// GetApplyFieldManagerFlag gets the field manager for kubectl apply

155
staging/src/k8s.io/kubectl/pkg/cmd/apply/apply_test.go
View File

@ -31,6 +31,7 @@ import (
openapi_v2 "github.com/google/gnostic/openapiv2"
"github.com/spf13/cobra"
"github.com/stretchr/testify/require"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
@ -40,6 +41,7 @@ import (
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/sets"
sptest "k8s.io/apimachinery/pkg/util/strategicpatch/testing"
"k8s.io/cli-runtime/pkg/genericclioptions"
"k8s.io/cli-runtime/pkg/resource"
@ -47,6 +49,7 @@ import (
dynamicfakeclient "k8s.io/client-go/dynamic/fake"
restclient "k8s.io/client-go/rest"
"k8s.io/client-go/rest/fake"
"k8s.io/client-go/util/csaupgrade"
cmdtesting "k8s.io/kubectl/pkg/cmd/testing"
cmdutil "k8s.io/kubectl/pkg/cmd/util"
"k8s.io/kubectl/pkg/scheme"
@ -185,6 +188,7 @@ const (
filenameRCLastAppliedArgs = "../../../testdata/apply/rc-lastapplied-args.yaml"
filenameRCNoAnnotation = "../../../testdata/apply/rc-no-annotation.yaml"
filenameRCLASTAPPLIED = "../../../testdata/apply/rc-lastapplied.yaml"
filenameRCManagedFieldsLA = "../../../testdata/apply/rc-managedfields-lastapplied.yaml"
filenameSVC = "../../../testdata/apply/service.yaml"
filenameRCSVC = "../../../testdata/apply/rc-service.yaml"
filenameNoExistRC = "../../../testdata/apply/rc-noexist.yaml"
@ -710,6 +714,157 @@ func TestApplyPruneObjects(t *testing.T) {
}
}
// Tests that apply of object in need of CSA migration results in a call
// to patch it.
func TestApplyCSAMigration(t *testing.T) {
cmdtesting.InitTestErrorHandler(t)
nameRC, rcWithManagedFields := readAndAnnotateReplicationController(t, filenameRCManagedFieldsLA)
pathRC := "/namespaces/test/replicationcontrollers/" + nameRC
tf := cmdtesting.NewTestFactory().WithNamespace("test")
defer tf.Cleanup()
// The object after patch should be equivalent to the output of
// csaupgrade.UpgradeManagedFields
//
// Parse object into unstructured, apply patch
postPatchObj := &unstructured.Unstructured{}
err := json.Unmarshal(rcWithManagedFields, &postPatchObj.Object)
require.NoError(t, err)
expectedPatch, err := csaupgrade.UpgradeManagedFieldsPatch(postPatchObj, sets.New(FieldManagerClientSideApply), "kubectl")
require.NoError(t, err)
err = csaupgrade.UpgradeManagedFields(postPatchObj, sets.New("kubectl-client-side-apply"), "kubectl")
require.NoError(t, err)
postPatchData, err := json.Marshal(postPatchObj)
require.NoError(t, err)
patches := 0
targetPatches := 2
applies := 0
tf.UnstructuredClient = &fake.RESTClient{
NegotiatedSerializer: resource.UnstructuredPlusDefaultContentConfig().NegotiatedSerializer,
Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
switch p, m := req.URL.Path, req.Method; {
case p == pathRC && m == "GET":
// During retry loop for patch fetch is performed.
// keep returning the unchanged data
if patches < targetPatches {
bodyRC := ioutil.NopCloser(bytes.NewReader(rcWithManagedFields))
return &http.Response{StatusCode: http.StatusOK, Header: cmdtesting.DefaultHeader(), Body: bodyRC}, nil
}
t.Fatalf("should not do a fetch in serverside-apply")
return nil, nil
case p == pathRC && m == "PATCH":
if got := req.Header.Get("Content-Type"); got == string(types.ApplyPatchType) {
defer func() {
applies += 1
}()
switch applies {
case 0:
// initial apply.
// Just return the same object but with managed fields
bodyRC := ioutil.NopCloser(bytes.NewReader(rcWithManagedFields))
return &http.Response{StatusCode: http.StatusOK, Header: cmdtesting.DefaultHeader(), Body: bodyRC}, nil
case 1:
// Second apply should include only last apply annotation unmodified
// Return new object
// NOTE: on a real server this would also modify the managed fields
// just return the same object unmodified. It is not so important
// for this test for the last-applied to appear in new field
// manager response, only that the client asks the server to do it
bodyRC := ioutil.NopCloser(bytes.NewReader(rcWithManagedFields))
return &http.Response{StatusCode: http.StatusOK, Header: cmdtesting.DefaultHeader(), Body: bodyRC}, nil
case 2, 3:
// Before the last apply we have formed our JSONPAtch so it
// should reply now with the upgraded object
bodyRC := ioutil.NopCloser(bytes.NewReader(postPatchData))
return &http.Response{StatusCode: http.StatusOK, Header: cmdtesting.DefaultHeader(), Body: bodyRC}, nil
default:
require.Fail(t, "sent more apply requests than expected")
return &http.Response{StatusCode: http.StatusBadRequest, Header: cmdtesting.DefaultHeader()}, nil
}
} else if got == string(types.JSONPatchType) {
defer func() {
patches += 1
}()
// Require that the patch is equal to what is expected
body, err := ioutil.ReadAll(req.Body)
require.NoError(t, err)
require.Equal(t, expectedPatch, body)
switch patches {
case targetPatches - 1:
bodyRC := ioutil.NopCloser(bytes.NewReader(postPatchData))
return &http.Response{StatusCode: http.StatusOK, Header: cmdtesting.DefaultHeader(), Body: bodyRC}, nil
default:
// Return conflict until the client has retried enough times
return &http.Response{StatusCode: http.StatusConflict, Header: cmdtesting.DefaultHeader()}, nil
}
} else {
t.Fatalf("unexpected content-type: %s\n", got)
return nil, nil
}
default:
t.Fatalf("unexpected request: %#v\n%#v", req.URL, req)
return nil, nil
}
}),
}
tf.OpenAPISchemaFunc = FakeOpenAPISchema.OpenAPISchemaFn
tf.FakeOpenAPIGetter = FakeOpenAPISchema.OpenAPIGetter
tf.ClientConfigVal = cmdtesting.DefaultClientConfig()
ioStreams, _, buf, errBuf := genericclioptions.NewTestIOStreams()
cmd := NewCmdApply("kubectl", tf, ioStreams)
cmd.Flags().Set("filename", filenameRC)
cmd.Flags().Set("output", "yaml")
cmd.Flags().Set("server-side", "true")
cmd.Flags().Set("show-managed-fields", "true")
cmd.Run(cmd, []string{})
// JSONPatch should have been attempted exactly the given number of times
require.Equal(t, targetPatches, patches, "should retry as many times as a conflict was returned")
require.Equal(t, 3, applies, "should perform specified # of apply calls upon migration")
require.Empty(t, errBuf.String())
// ensure that in the future there will be no migrations necessary
// (by showing migration is a no-op)
rc := &corev1.ReplicationController{}
if err := runtime.DecodeInto(codec, buf.Bytes(), rc); err != nil {
t.Fatal(err)
}
upgradedRC := rc.DeepCopyObject()
err = csaupgrade.UpgradeManagedFields(upgradedRC, sets.New("kubectl-client-side-apply"), "kubectl")
require.NoError(t, err)
require.NotEmpty(t, rc.ManagedFields)
require.Equal(t, rc, upgradedRC, "upgrading should be no-op in future")
// Apply the upgraded object.
// Expect only a single PATCH call to apiserver
ioStreams, _, _, errBuf = genericclioptions.NewTestIOStreams()
cmd = NewCmdApply("kubectl", tf, ioStreams)
cmd.Flags().Set("filename", filenameRC)
cmd.Flags().Set("output", "yaml")
cmd.Flags().Set("server-side", "true")
cmd.Flags().Set("show-managed-fields", "true")
cmd.Run(cmd, []string{})
require.Empty(t, errBuf)
require.Equal(t, 4, applies, "only a single call to server-side apply should have been performed")
require.Equal(t, targetPatches, patches, "no more json patches should have been needed")
}
func TestApplyObjectOutput(t *testing.T) {
cmdtesting.InitTestErrorHandler(t)
nameRC, currentRC := readAndAnnotateReplicationController(t, filenameRC)

102
staging/src/k8s.io/kubectl/testdata/apply/rc-managedfields-lastapplied.yaml vendored Normal file
View File

@ -0,0 +1,102 @@
apiVersion: v1
kind: ReplicationController
metadata:
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","kind":"ReplicationController","metadata":{"annotations":{},"labels":{"name":"test-rc"},"name":"test-rc","namespace":"test"},"spec":{"replicas":1,"template":{"metadata":{"labels":{"name":"test-rc"}},"spec":{"containers":[{"image":"nginx","name":"test-rc","ports":[{"containerPort":80}]}]}}}}
creationTimestamp: "2022-10-06T20:46:22Z"
generation: 1
labels:
name: test-rc
managedFields:
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:status:
f:fullyLabeledReplicas: {}
f:observedGeneration: {}
f:replicas: {}
manager: kube-controller-manager
operation: Update
subresource: status
time: "2022-10-06T20:46:22Z"
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:metadata:
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
f:labels:
.: {}
f:name: {}
f:spec:
f:replicas: {}
f:selector: {}
f:template:
.: {}
f:metadata:
.: {}
f:creationTimestamp: {}
f:labels:
.: {}
f:name: {}
f:spec:
.: {}
f:containers:
.: {}
k:{"name":"test-rc"}:
.: {}
f:image: {}
f:imagePullPolicy: {}
f:name: {}
f:ports:
.: {}
k:{"containerPort":80,"protocol":"TCP"}:
.: {}
f:containerPort: {}
f:protocol: {}
f:resources: {}
f:terminationMessagePath: {}
f:terminationMessagePolicy: {}
f:dnsPolicy: {}
f:restartPolicy: {}
f:schedulerName: {}
f:securityContext: {}
f:terminationGracePeriodSeconds: {}
manager: kubectl-client-side-apply
operation: Update
time: "2022-10-06T20:46:22Z"
name: test-rc
namespace: test
resourceVersion: "290"
uid: ad68b34c-d6c5-4d09-b50d-ef49c109778d
spec:
replicas: 1
selector:
name: test-rc
template:
metadata:
creationTimestamp: null
labels:
name: test-rc
spec:
containers:
- image: nginx
imagePullPolicy: Always
name: test-rc
ports:
- containerPort: 80
protocol: TCP
resources: {}
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
dnsPolicy: ClusterFirst
restartPolicy: Always
schedulerName: default-scheduler
securityContext: {}
terminationGracePeriodSeconds: 30
status:
fullyLabeledReplicas: 1
observedGeneration: 1
replicas: 1

159
test/cmd/apply.sh
View File

@ -438,6 +438,165 @@ run_kubectl_server_side_apply_tests() {
# clean-up
kubectl delete -f hack/testdata/pod.yaml "${kube_flags[@]:?}"
# Test apply migration
# Create a configmap in the cluster with client-side apply:
output_message=$(kubectl "${kube_flags[@]:?}" apply --server-side=false -f - << __EOF__
apiVersion: v1
kind: ConfigMap
metadata:
name: test
data:
key: value
legacy: unused
__EOF__
)
kube::test::if_has_string "${output_message}" 'configmap/test created'
# Apply the same manifest with --server-side flag, as per server-side-apply migration instructions:
output_message=$(kubectl "${kube_flags[@]:?}" apply --server-side -f - << __EOF__
apiVersion: v1
kind: ConfigMap
metadata:
name: test
data:
key: value
legacy: unused
__EOF__
)
kube::test::if_has_string "${output_message}" 'configmap/test serverside-applied'
# Apply the object a third time using server-side-apply, but this time removing
# a field and adding a field. Old versions of kubectl would not allow the field
# to be removed
output_message=$(kubectl "${kube_flags[@]:?}" apply --server-side -f - << __EOF__
apiVersion: v1
kind: ConfigMap
metadata:
name: test
data:
key: value
ssaKey: ssaValue
__EOF__
)
kube::test::if_has_string "${output_message}" 'configmap/test serverside-applied'
# Fetch the object and check to see that it does not have a field 'legacy'
kube::test::get_object_assert "configmap test" "{{ .data.key }}" 'value'
kube::test::get_object_assert "configmap test" "{{ .data.legacy }}" '<no value>'
kube::test::get_object_assert "configmap test" "{{ .data.ssaKey }}" 'ssaValue'
# CSA the object after it has been server-side-applied and had a field removed
# Add new key with client-side-apply. Also removes the field from server-side-apply
output_message=$(kubectl "${kube_flags[@]:?}" apply --server-side=false -f - << __EOF__
apiVersion: v1
kind: ConfigMap
metadata:
name: test
data:
key: value
newKey: newValue
__EOF__
)
kube::test::get_object_assert "configmap test" "{{ .data.key }}" 'value'
kube::test::get_object_assert "configmap test" "{{ .data.newKey }}" 'newValue'
kube::test::get_object_assert "configmap test" "{{ .data.ssaKey }}" '<no value>'
# SSA the object without the field added above by CSA. Show that the object
# on the server has had the field removed
output_message=$(kubectl "${kube_flags[@]:?}" apply --server-side -f - << __EOF__
apiVersion: v1
kind: ConfigMap
metadata:
name: test
data:
key: value
ssaKey: ssaValue
__EOF__
)
# Fetch the object and check to see that it does not have a field 'newKey'
kube::test::get_object_assert "configmap test" "{{ .data.key }}" 'value'
kube::test::get_object_assert "configmap test" "{{ .data.newKey }}" '<no value>'
kube::test::get_object_assert "configmap test" "{{ .data.ssaKey }}" 'ssaValue'
# Show that kubectl diff --server-side also functions after a migration
output_message=$(kubectl diff "${kube_flags[@]:?}" --server-side -f - << __EOF__ || test $? -eq 1
apiVersion: v1
kind: ConfigMap
metadata:
name: test
annotations:
newAnnotation: newValue
data:
key: value
newKey: newValue
__EOF__
)
kube::test::if_has_string "${output_message}" '+ newKey: newValue'
kube::test::if_has_string "${output_message}" '+ newAnnotation: newValue'
# clean-up
kubectl "${kube_flags[@]:?}" delete configmap test
## Test to show that supplying a custom field manager to kubectl apply
# does not prevent migration from client-side-apply to server-side-apply
output_message=$(kubectl "${kube_flags[@]:?}" apply --server-side=false --field-manager=myfm -f - << __EOF__
apiVersion: v1
data:
key: value1
legacy: value2
kind: ConfigMap
metadata:
name: ssa-test
__EOF__
)
kube::test::if_has_string "$output_message" "configmap/ssa-test created"
kube::test::get_object_assert "configmap ssa-test" "{{ .data.key }}" 'value1'
# show that after client-side applying with a custom field manager, the
# last-applied-annotation is present
grep -q kubectl.kubernetes.io/last-applied-configuration <<< "$(kubectl get configmap ssa-test -o yaml "${kube_flags[@]:?}")"
# Migrate to server-side-apply by applying the same object
output_message=$(kubectl "${kube_flags[@]:?}" apply --server-side=true --field-manager=myfm -f - << __EOF__
apiVersion: v1
data:
key: value1
legacy: value2
kind: ConfigMap
metadata:
name: ssa-test
__EOF__
)
kube::test::if_has_string "$output_message" "configmap/ssa-test serverside-applied"
kube::test::get_object_assert "configmap ssa-test" "{{ .data.key }}" 'value1'
# show that after migrating to SSA with a custom field manager, the
# last-applied-annotation is dropped
! grep -q kubectl.kubernetes.io/last-applied-configuration <<< "$(kubectl get configmap ssa-test -o yaml "${kube_flags[@]:?}")" || exit 1
# Change a field without having any conflict and also drop a field in the same patch
output_message=$(kubectl "${kube_flags[@]:?}" apply --server-side=true --field-manager=myfm -f - << __EOF__
apiVersion: v1
data:
key: value2
kind: ConfigMap
metadata:
name: ssa-test
__EOF__
)
kube::test::if_has_string "$output_message" "configmap/ssa-test serverside-applied"
kube::test::get_object_assert "configmap ssa-test" "{{ .data.key }}" 'value2'
kube::test::get_object_assert "configmap ssa-test" "{{ .data.legacy }}" '<no value>'
# Clean up
kubectl delete configmap ssa-test
## kubectl apply dry-run on CR
# Create CRD
kubectl "${kube_flags_with_token[@]}" create -f - << __EOF__

1
vendor/modules.txt vendored
View File

@ -1908,6 +1908,7 @@ k8s.io/client-go/util/cert
k8s.io/client-go/util/certificate
k8s.io/client-go/util/certificate/csr
k8s.io/client-go/util/connrotation
k8s.io/client-go/util/csaupgrade
k8s.io/client-go/util/exec
k8s.io/client-go/util/flowcontrol
k8s.io/client-go/util/homedir