rebase: add controller runtime dependency

this commits add the controller runtime
and its dependency to the vendor.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/k8s.io/client-go/tools/leaderelection/resourcelock/configmaplock.go

@@ -0,0 +1,117 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package resourcelock
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	corev1client "k8s.io/client-go/kubernetes/typed/core/v1"
+)
+
+// TODO: This is almost a exact replica of Endpoints lock.
+// going forwards as we self host more and more components
+// and use ConfigMaps as the means to pass that configuration
+// data we will likely move to deprecate the Endpoints lock.
+
+type ConfigMapLock struct {
+	// ConfigMapMeta should contain a Name and a Namespace of a
+	// ConfigMapMeta object that the LeaderElector will attempt to lead.
+	ConfigMapMeta metav1.ObjectMeta
+	Client        corev1client.ConfigMapsGetter
+	LockConfig    ResourceLockConfig
+	cm            *v1.ConfigMap
+}
+
+// Get returns the election record from a ConfigMap Annotation
+func (cml *ConfigMapLock) Get(ctx context.Context) (*LeaderElectionRecord, []byte, error) {
+	var record LeaderElectionRecord
+	var err error
+	cml.cm, err = cml.Client.ConfigMaps(cml.ConfigMapMeta.Namespace).Get(ctx, cml.ConfigMapMeta.Name, metav1.GetOptions{})
+	if err != nil {
+		return nil, nil, err
+	}
+	if cml.cm.Annotations == nil {
+		cml.cm.Annotations = make(map[string]string)
+	}
+	recordBytes, found := cml.cm.Annotations[LeaderElectionRecordAnnotationKey]
+	if found {
+		if err := json.Unmarshal([]byte(recordBytes), &record); err != nil {
+			return nil, nil, err
+		}
+	}
+	return &record, []byte(recordBytes), nil
+}
+
+// Create attempts to create a LeaderElectionRecord annotation
+func (cml *ConfigMapLock) Create(ctx context.Context, ler LeaderElectionRecord) error {
+	recordBytes, err := json.Marshal(ler)
+	if err != nil {
+		return err
+	}
+	cml.cm, err = cml.Client.ConfigMaps(cml.ConfigMapMeta.Namespace).Create(ctx, &v1.ConfigMap{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      cml.ConfigMapMeta.Name,
+			Namespace: cml.ConfigMapMeta.Namespace,
+			Annotations: map[string]string{
+				LeaderElectionRecordAnnotationKey: string(recordBytes),
+			},
+		},
+	}, metav1.CreateOptions{})
+	return err
+}
+
+// Update will update an existing annotation on a given resource.
+func (cml *ConfigMapLock) Update(ctx context.Context, ler LeaderElectionRecord) error {
+	if cml.cm == nil {
+		return errors.New("configmap not initialized, call get or create first")
+	}
+	recordBytes, err := json.Marshal(ler)
+	if err != nil {
+		return err
+	}
+	if cml.cm.Annotations == nil {
+		cml.cm.Annotations = make(map[string]string)
+	}
+	cml.cm.Annotations[LeaderElectionRecordAnnotationKey] = string(recordBytes)
+	cml.cm, err = cml.Client.ConfigMaps(cml.ConfigMapMeta.Namespace).Update(ctx, cml.cm, metav1.UpdateOptions{})
+	return err
+}
+
+// RecordEvent in leader election while adding meta-data
+func (cml *ConfigMapLock) RecordEvent(s string) {
+	if cml.LockConfig.EventRecorder == nil {
+		return
+	}
+	events := fmt.Sprintf("%v %v", cml.LockConfig.Identity, s)
+	cml.LockConfig.EventRecorder.Eventf(&v1.ConfigMap{ObjectMeta: cml.cm.ObjectMeta}, v1.EventTypeNormal, "LeaderElection", events)
+}
+
+// Describe is used to convert details on current resource lock
+// into a string
+func (cml *ConfigMapLock) Describe() string {
+	return fmt.Sprintf("%v/%v", cml.ConfigMapMeta.Namespace, cml.ConfigMapMeta.Name)
+}
+
+// Identity returns the Identity of the lock
+func (cml *ConfigMapLock) Identity() string {
+	return cml.LockConfig.Identity
+}

vendor/k8s.io/client-go/tools/leaderelection/resourcelock/endpointslock.go

@@ -0,0 +1,112 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package resourcelock
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	corev1client "k8s.io/client-go/kubernetes/typed/core/v1"
+)
+
+type EndpointsLock struct {
+	// EndpointsMeta should contain a Name and a Namespace of an
+	// Endpoints object that the LeaderElector will attempt to lead.
+	EndpointsMeta metav1.ObjectMeta
+	Client        corev1client.EndpointsGetter
+	LockConfig    ResourceLockConfig
+	e             *v1.Endpoints
+}
+
+// Get returns the election record from a Endpoints Annotation
+func (el *EndpointsLock) Get(ctx context.Context) (*LeaderElectionRecord, []byte, error) {
+	var record LeaderElectionRecord
+	var err error
+	el.e, err = el.Client.Endpoints(el.EndpointsMeta.Namespace).Get(ctx, el.EndpointsMeta.Name, metav1.GetOptions{})
+	if err != nil {
+		return nil, nil, err
+	}
+	if el.e.Annotations == nil {
+		el.e.Annotations = make(map[string]string)
+	}
+	recordBytes, found := el.e.Annotations[LeaderElectionRecordAnnotationKey]
+	if found {
+		if err := json.Unmarshal([]byte(recordBytes), &record); err != nil {
+			return nil, nil, err
+		}
+	}
+	return &record, []byte(recordBytes), nil
+}
+
+// Create attempts to create a LeaderElectionRecord annotation
+func (el *EndpointsLock) Create(ctx context.Context, ler LeaderElectionRecord) error {
+	recordBytes, err := json.Marshal(ler)
+	if err != nil {
+		return err
+	}
+	el.e, err = el.Client.Endpoints(el.EndpointsMeta.Namespace).Create(ctx, &v1.Endpoints{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      el.EndpointsMeta.Name,
+			Namespace: el.EndpointsMeta.Namespace,
+			Annotations: map[string]string{
+				LeaderElectionRecordAnnotationKey: string(recordBytes),
+			},
+		},
+	}, metav1.CreateOptions{})
+	return err
+}
+
+// Update will update and existing annotation on a given resource.
+func (el *EndpointsLock) Update(ctx context.Context, ler LeaderElectionRecord) error {
+	if el.e == nil {
+		return errors.New("endpoint not initialized, call get or create first")
+	}
+	recordBytes, err := json.Marshal(ler)
+	if err != nil {
+		return err
+	}
+	if el.e.Annotations == nil {
+		el.e.Annotations = make(map[string]string)
+	}
+	el.e.Annotations[LeaderElectionRecordAnnotationKey] = string(recordBytes)
+	el.e, err = el.Client.Endpoints(el.EndpointsMeta.Namespace).Update(ctx, el.e, metav1.UpdateOptions{})
+	return err
+}
+
+// RecordEvent in leader election while adding meta-data
+func (el *EndpointsLock) RecordEvent(s string) {
+	if el.LockConfig.EventRecorder == nil {
+		return
+	}
+	events := fmt.Sprintf("%v %v", el.LockConfig.Identity, s)
+	el.LockConfig.EventRecorder.Eventf(&v1.Endpoints{ObjectMeta: el.e.ObjectMeta}, v1.EventTypeNormal, "LeaderElection", events)
+}
+
+// Describe is used to convert details on current resource lock
+// into a string
+func (el *EndpointsLock) Describe() string {
+	return fmt.Sprintf("%v/%v", el.EndpointsMeta.Namespace, el.EndpointsMeta.Name)
+}
+
+// Identity returns the Identity of the lock
+func (el *EndpointsLock) Identity() string {
+	return el.LockConfig.Identity
+}

vendor/k8s.io/client-go/tools/leaderelection/resourcelock/interface.go

@@ -0,0 +1,142 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package resourcelock
+
+import (
+	"context"
+	"fmt"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	coordinationv1 "k8s.io/client-go/kubernetes/typed/coordination/v1"
+	corev1 "k8s.io/client-go/kubernetes/typed/core/v1"
+)
+
+const (
+	LeaderElectionRecordAnnotationKey = "control-plane.alpha.kubernetes.io/leader"
+	EndpointsResourceLock             = "endpoints"
+	ConfigMapsResourceLock            = "configmaps"
+	LeasesResourceLock                = "leases"
+	EndpointsLeasesResourceLock       = "endpointsleases"
+	ConfigMapsLeasesResourceLock      = "configmapsleases"
+)
+
+// LeaderElectionRecord is the record that is stored in the leader election annotation.
+// This information should be used for observational purposes only and could be replaced
+// with a random string (e.g. UUID) with only slight modification of this code.
+// TODO(mikedanese): this should potentially be versioned
+type LeaderElectionRecord struct {
+	// HolderIdentity is the ID that owns the lease. If empty, no one owns this lease and
+	// all callers may acquire. Versions of this library prior to Kubernetes 1.14 will not
+	// attempt to acquire leases with empty identities and will wait for the full lease
+	// interval to expire before attempting to reacquire. This value is set to empty when
+	// a client voluntarily steps down.
+	HolderIdentity       string      `json:"holderIdentity"`
+	LeaseDurationSeconds int         `json:"leaseDurationSeconds"`
+	AcquireTime          metav1.Time `json:"acquireTime"`
+	RenewTime            metav1.Time `json:"renewTime"`
+	LeaderTransitions    int         `json:"leaderTransitions"`
+}
+
+// EventRecorder records a change in the ResourceLock.
+type EventRecorder interface {
+	Eventf(obj runtime.Object, eventType, reason, message string, args ...interface{})
+}
+
+// ResourceLockConfig common data that exists across different
+// resource locks
+type ResourceLockConfig struct {
+	// Identity is the unique string identifying a lease holder across
+	// all participants in an election.
+	Identity string
+	// EventRecorder is optional.
+	EventRecorder EventRecorder
+}
+
+// Interface offers a common interface for locking on arbitrary
+// resources used in leader election.  The Interface is used
+// to hide the details on specific implementations in order to allow
+// them to change over time.  This interface is strictly for use
+// by the leaderelection code.
+type Interface interface {
+	// Get returns the LeaderElectionRecord
+	Get(ctx context.Context) (*LeaderElectionRecord, []byte, error)
+
+	// Create attempts to create a LeaderElectionRecord
+	Create(ctx context.Context, ler LeaderElectionRecord) error
+
+	// Update will update and existing LeaderElectionRecord
+	Update(ctx context.Context, ler LeaderElectionRecord) error
+
+	// RecordEvent is used to record events
+	RecordEvent(string)
+
+	// Identity will return the locks Identity
+	Identity() string
+
+	// Describe is used to convert details on current resource lock
+	// into a string
+	Describe() string
+}
+
+// Manufacture will create a lock of a given type according to the input parameters
+func New(lockType string, ns string, name string, coreClient corev1.CoreV1Interface, coordinationClient coordinationv1.CoordinationV1Interface, rlc ResourceLockConfig) (Interface, error) {
+	endpointsLock := &EndpointsLock{
+		EndpointsMeta: metav1.ObjectMeta{
+			Namespace: ns,
+			Name:      name,
+		},
+		Client:     coreClient,
+		LockConfig: rlc,
+	}
+	configmapLock := &ConfigMapLock{
+		ConfigMapMeta: metav1.ObjectMeta{
+			Namespace: ns,
+			Name:      name,
+		},
+		Client:     coreClient,
+		LockConfig: rlc,
+	}
+	leaseLock := &LeaseLock{
+		LeaseMeta: metav1.ObjectMeta{
+			Namespace: ns,
+			Name:      name,
+		},
+		Client:     coordinationClient,
+		LockConfig: rlc,
+	}
+	switch lockType {
+	case EndpointsResourceLock:
+		return endpointsLock, nil
+	case ConfigMapsResourceLock:
+		return configmapLock, nil
+	case LeasesResourceLock:
+		return leaseLock, nil
+	case EndpointsLeasesResourceLock:
+		return &MultiLock{
+			Primary:   endpointsLock,
+			Secondary: leaseLock,
+		}, nil
+	case ConfigMapsLeasesResourceLock:
+		return &MultiLock{
+			Primary:   configmapLock,
+			Secondary: leaseLock,
+		}, nil
+	default:
+		return nil, fmt.Errorf("Invalid lock-type %s", lockType)
+	}
+}

vendor/k8s.io/client-go/tools/leaderelection/resourcelock/leaselock.go

@@ -0,0 +1,130 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package resourcelock
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+
+	coordinationv1 "k8s.io/api/coordination/v1"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	coordinationv1client "k8s.io/client-go/kubernetes/typed/coordination/v1"
+)
+
+type LeaseLock struct {
+	// LeaseMeta should contain a Name and a Namespace of a
+	// LeaseMeta object that the LeaderElector will attempt to lead.
+	LeaseMeta  metav1.ObjectMeta
+	Client     coordinationv1client.LeasesGetter
+	LockConfig ResourceLockConfig
+	lease      *coordinationv1.Lease
+}
+
+// Get returns the election record from a Lease spec
+func (ll *LeaseLock) Get(ctx context.Context) (*LeaderElectionRecord, []byte, error) {
+	var err error
+	ll.lease, err = ll.Client.Leases(ll.LeaseMeta.Namespace).Get(ctx, ll.LeaseMeta.Name, metav1.GetOptions{})
+	if err != nil {
+		return nil, nil, err
+	}
+	record := LeaseSpecToLeaderElectionRecord(&ll.lease.Spec)
+	recordByte, err := json.Marshal(*record)
+	if err != nil {
+		return nil, nil, err
+	}
+	return record, recordByte, nil
+}
+
+// Create attempts to create a Lease
+func (ll *LeaseLock) Create(ctx context.Context, ler LeaderElectionRecord) error {
+	var err error
+	ll.lease, err = ll.Client.Leases(ll.LeaseMeta.Namespace).Create(ctx, &coordinationv1.Lease{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      ll.LeaseMeta.Name,
+			Namespace: ll.LeaseMeta.Namespace,
+		},
+		Spec: LeaderElectionRecordToLeaseSpec(&ler),
+	}, metav1.CreateOptions{})
+	return err
+}
+
+// Update will update an existing Lease spec.
+func (ll *LeaseLock) Update(ctx context.Context, ler LeaderElectionRecord) error {
+	if ll.lease == nil {
+		return errors.New("lease not initialized, call get or create first")
+	}
+	ll.lease.Spec = LeaderElectionRecordToLeaseSpec(&ler)
+	var err error
+	ll.lease, err = ll.Client.Leases(ll.LeaseMeta.Namespace).Update(ctx, ll.lease, metav1.UpdateOptions{})
+	return err
+}
+
+// RecordEvent in leader election while adding meta-data
+func (ll *LeaseLock) RecordEvent(s string) {
+	if ll.LockConfig.EventRecorder == nil {
+		return
+	}
+	events := fmt.Sprintf("%v %v", ll.LockConfig.Identity, s)
+	ll.LockConfig.EventRecorder.Eventf(&coordinationv1.Lease{ObjectMeta: ll.lease.ObjectMeta}, corev1.EventTypeNormal, "LeaderElection", events)
+}
+
+// Describe is used to convert details on current resource lock
+// into a string
+func (ll *LeaseLock) Describe() string {
+	return fmt.Sprintf("%v/%v", ll.LeaseMeta.Namespace, ll.LeaseMeta.Name)
+}
+
+// Identity returns the Identity of the lock
+func (ll *LeaseLock) Identity() string {
+	return ll.LockConfig.Identity
+}
+
+func LeaseSpecToLeaderElectionRecord(spec *coordinationv1.LeaseSpec) *LeaderElectionRecord {
+	var r LeaderElectionRecord
+	if spec.HolderIdentity != nil {
+		r.HolderIdentity = *spec.HolderIdentity
+	}
+	if spec.LeaseDurationSeconds != nil {
+		r.LeaseDurationSeconds = int(*spec.LeaseDurationSeconds)
+	}
+	if spec.LeaseTransitions != nil {
+		r.LeaderTransitions = int(*spec.LeaseTransitions)
+	}
+	if spec.AcquireTime != nil {
+		r.AcquireTime = metav1.Time{spec.AcquireTime.Time}
+	}
+	if spec.RenewTime != nil {
+		r.RenewTime = metav1.Time{spec.RenewTime.Time}
+	}
+	return &r
+
+}
+
+func LeaderElectionRecordToLeaseSpec(ler *LeaderElectionRecord) coordinationv1.LeaseSpec {
+	leaseDurationSeconds := int32(ler.LeaseDurationSeconds)
+	leaseTransitions := int32(ler.LeaderTransitions)
+	return coordinationv1.LeaseSpec{
+		HolderIdentity:       &ler.HolderIdentity,
+		LeaseDurationSeconds: &leaseDurationSeconds,
+		AcquireTime:          &metav1.MicroTime{ler.AcquireTime.Time},
+		RenewTime:            &metav1.MicroTime{ler.RenewTime.Time},
+		LeaseTransitions:     &leaseTransitions,
+	}
+}

vendor/k8s.io/client-go/tools/leaderelection/resourcelock/multilock.go

@@ -0,0 +1,104 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package resourcelock
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+)
+
+const (
+	UnknownLeader = "leaderelection.k8s.io/unknown"
+)
+
+// MultiLock is used for lock's migration
+type MultiLock struct {
+	Primary   Interface
+	Secondary Interface
+}
+
+// Get returns the older election record of the lock
+func (ml *MultiLock) Get(ctx context.Context) (*LeaderElectionRecord, []byte, error) {
+	primary, primaryRaw, err := ml.Primary.Get(ctx)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	secondary, secondaryRaw, err := ml.Secondary.Get(ctx)
+	if err != nil {
+		// Lock is held by old client
+		if apierrors.IsNotFound(err) && primary.HolderIdentity != ml.Identity() {
+			return primary, primaryRaw, nil
+		}
+		return nil, nil, err
+	}
+
+	if primary.HolderIdentity != secondary.HolderIdentity {
+		primary.HolderIdentity = UnknownLeader
+		primaryRaw, err = json.Marshal(primary)
+		if err != nil {
+			return nil, nil, err
+		}
+	}
+	return primary, ConcatRawRecord(primaryRaw, secondaryRaw), nil
+}
+
+// Create attempts to create both primary lock and secondary lock
+func (ml *MultiLock) Create(ctx context.Context, ler LeaderElectionRecord) error {
+	err := ml.Primary.Create(ctx, ler)
+	if err != nil && !apierrors.IsAlreadyExists(err) {
+		return err
+	}
+	return ml.Secondary.Create(ctx, ler)
+}
+
+// Update will update and existing annotation on both two resources.
+func (ml *MultiLock) Update(ctx context.Context, ler LeaderElectionRecord) error {
+	err := ml.Primary.Update(ctx, ler)
+	if err != nil {
+		return err
+	}
+	_, _, err = ml.Secondary.Get(ctx)
+	if err != nil && apierrors.IsNotFound(err) {
+		return ml.Secondary.Create(ctx, ler)
+	}
+	return ml.Secondary.Update(ctx, ler)
+}
+
+// RecordEvent in leader election while adding meta-data
+func (ml *MultiLock) RecordEvent(s string) {
+	ml.Primary.RecordEvent(s)
+	ml.Secondary.RecordEvent(s)
+}
+
+// Describe is used to convert details on current resource lock
+// into a string
+func (ml *MultiLock) Describe() string {
+	return ml.Primary.Describe()
+}
+
+// Identity returns the Identity of the lock
+func (ml *MultiLock) Identity() string {
+	return ml.Primary.Identity()
+}
+
+func ConcatRawRecord(primaryRaw, secondaryRaw []byte) []byte {
+	return bytes.Join([][]byte{primaryRaw, secondaryRaw}, []byte(","))
+}