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add prune and remove unused packages

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This commit is contained in:
Michelle Au
2019-03-08 14:54:43 -08:00
parent f59b58d164
commit 8c0accad66
17240 changed files with 27 additions and 4750030 deletions
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13
vendor/k8s.io/client-go/tools/leaderelection/OWNERS generated vendored
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@@ -1,13 +0,0 @@
approvers:
- mikedanese
- timothysc
reviewers:
- wojtek-t
- deads2k
- mikedanese
- gmarek
- eparis
- timothysc
- ingvagabund
- resouer
- goltermann

69
vendor/k8s.io/client-go/tools/leaderelection/healthzadaptor.go generated vendored
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@@ -1,69 +0,0 @@
/*
Copyright 2015 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 leaderelection
import (
"net/http"
"sync"
"time"
)
// HealthzAdaptor associates the /healthz endpoint with the LeaderElection object.
// It helps deal with the /healthz endpoint being set up prior to the LeaderElection.
// This contains the code needed to act as an adaptor between the leader
// election code the health check code. It allows us to provide health
// status about the leader election. Most specifically about if the leader
// has failed to renew without exiting the process. In that case we should
// report not healthy and rely on the kubelet to take down the process.
type HealthzAdaptor struct {
pointerLock sync.Mutex
le *LeaderElector
timeout time.Duration
}
// Name returns the name of the health check we are implementing.
func (l *HealthzAdaptor) Name() string {
return "leaderElection"
}
// Check is called by the healthz endpoint handler.
// It fails (returns an error) if we own the lease but had not been able to renew it.
func (l *HealthzAdaptor) Check(req *http.Request) error {
l.pointerLock.Lock()
defer l.pointerLock.Unlock()
if l.le == nil {
return nil
}
return l.le.Check(l.timeout)
}
// SetLeaderElection ties a leader election object to a HealthzAdaptor
func (l *HealthzAdaptor) SetLeaderElection(le *LeaderElector) {
l.pointerLock.Lock()
defer l.pointerLock.Unlock()
l.le = le
}
// NewLeaderHealthzAdaptor creates a basic healthz adaptor to monitor a leader election.
// timeout determines the time beyond the lease expiry to be allowed for timeout.
// checks within the timeout period after the lease expires will still return healthy.
func NewLeaderHealthzAdaptor(timeout time.Duration) *HealthzAdaptor {
result := &HealthzAdaptor{
timeout: timeout,
}
return result
}

175
vendor/k8s.io/client-go/tools/leaderelection/healthzadaptor_test.go generated vendored
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/*
Copyright 2015 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 leaderelection
import (
"fmt"
"testing"
"time"
"k8s.io/apimachinery/pkg/util/clock"
rl "k8s.io/client-go/tools/leaderelection/resourcelock"
"net/http"
)
type fakeLock struct {
identity string
}
// Get is a dummy to allow us to have a fakeLock for testing.
func (fl *fakeLock) Get() (ler *rl.LeaderElectionRecord, err error) {
return nil, nil
}
// Create is a dummy to allow us to have a fakeLock for testing.
func (fl *fakeLock) Create(ler rl.LeaderElectionRecord) error {
return nil
}
// Update is a dummy to allow us to have a fakeLock for testing.
func (fl *fakeLock) Update(ler rl.LeaderElectionRecord) error {
return nil
}
// RecordEvent is a dummy to allow us to have a fakeLock for testing.
func (fl *fakeLock) RecordEvent(string) {}
// Identity is a dummy to allow us to have a fakeLock for testing.
func (fl *fakeLock) Identity() string {
return fl.identity
}
// Describe is a dummy to allow us to have a fakeLock for testing.
func (fl *fakeLock) Describe() string {
return "Dummy implementation of lock for testing"
}
// TestLeaderElectionHealthChecker tests that the healthcheck for leader election handles its edge cases.
func TestLeaderElectionHealthChecker(t *testing.T) {
current := time.Now()
req := &http.Request{}
tests := []struct {
description string
expected error
adaptorTimeout time.Duration
elector *LeaderElector
}{
{
description: "call check before leader elector initialized",
expected: nil,
adaptorTimeout: time.Second * 20,
elector: nil,
},
{
description: "call check when the the lease is far expired",
expected: fmt.Errorf("failed election to renew leadership on lease %s", "foo"),
adaptorTimeout: time.Second * 20,
elector: &LeaderElector{
config: LeaderElectionConfig{
Lock: &fakeLock{identity: "healthTest"},
LeaseDuration: time.Minute,
Name: "foo",
},
observedRecord: rl.LeaderElectionRecord{
HolderIdentity: "healthTest",
},
observedTime: current,
clock: clock.NewFakeClock(current.Add(time.Hour)),
},
},
{
description: "call check when the the lease is far expired but held by another server",
expected: nil,
adaptorTimeout: time.Second * 20,
elector: &LeaderElector{
config: LeaderElectionConfig{
Lock: &fakeLock{identity: "healthTest"},
LeaseDuration: time.Minute,
Name: "foo",
},
observedRecord: rl.LeaderElectionRecord{
HolderIdentity: "otherServer",
},
observedTime: current,
clock: clock.NewFakeClock(current.Add(time.Hour)),
},
},
{
description: "call check when the the lease is not expired",
expected: nil,
adaptorTimeout: time.Second * 20,
elector: &LeaderElector{
config: LeaderElectionConfig{
Lock: &fakeLock{identity: "healthTest"},
LeaseDuration: time.Minute,
Name: "foo",
},
observedRecord: rl.LeaderElectionRecord{
HolderIdentity: "healthTest",
},
observedTime: current,
clock: clock.NewFakeClock(current),
},
},
{
description: "call check when the the lease is expired but inside the timeout",
expected: nil,
adaptorTimeout: time.Second * 20,
elector: &LeaderElector{
config: LeaderElectionConfig{
Lock: &fakeLock{identity: "healthTest"},
LeaseDuration: time.Minute,
Name: "foo",
},
observedRecord: rl.LeaderElectionRecord{
HolderIdentity: "healthTest",
},
observedTime: current,
clock: clock.NewFakeClock(current.Add(time.Minute).Add(time.Second)),
},
},
}
for _, test := range tests {
adaptor := NewLeaderHealthzAdaptor(test.adaptorTimeout)
if adaptor.le != nil {
t.Errorf("[%s] leaderChecker started with a LeaderElector %v", test.description, adaptor.le)
}
if test.elector != nil {
test.elector.config.WatchDog = adaptor
adaptor.SetLeaderElection(test.elector)
if adaptor.le == nil {
t.Errorf("[%s] adaptor failed to set the LeaderElector", test.description)
}
}
err := adaptor.Check(req)
if test.expected == nil {
if err == nil {
continue
}
t.Errorf("[%s] called check, expected no error but received \"%v\"", test.description, err)
} else {
if err == nil {
t.Errorf("[%s] called check and failed to received the expected error \"%v\"", test.description, test.expected)
}
if err.Error() != test.expected.Error() {
t.Errorf("[%s] called check, expected %v, received %v", test.description, test.expected, err)
}
}
}
}

336
vendor/k8s.io/client-go/tools/leaderelection/leaderelection.go generated vendored
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@@ -1,336 +0,0 @@
/*
Copyright 2015 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 leaderelection implements leader election of a set of endpoints.
// It uses an annotation in the endpoints object to store the record of the
// election state.
//
// This implementation does not guarantee that only one client is acting as a
// leader (a.k.a. fencing). A client observes timestamps captured locally to
// infer the state of the leader election. Thus the implementation is tolerant
// to arbitrary clock skew, but is not tolerant to arbitrary clock skew rate.
//
// However the level of tolerance to skew rate can be configured by setting
// RenewDeadline and LeaseDuration appropriately. The tolerance expressed as a
// maximum tolerated ratio of time passed on the fastest node to time passed on
// the slowest node can be approximately achieved with a configuration that sets
// the same ratio of LeaseDuration to RenewDeadline. For example if a user wanted
// to tolerate some nodes progressing forward in time twice as fast as other nodes,
// the user could set LeaseDuration to 60 seconds and RenewDeadline to 30 seconds.
//
// While not required, some method of clock synchronization between nodes in the
// cluster is highly recommended. It's important to keep in mind when configuring
// this client that the tolerance to skew rate varies inversely to master
// availability.
//
// Larger clusters often have a more lenient SLA for API latency. This should be
// taken into account when configuring the client. The rate of leader transitions
// should be monitored and RetryPeriod and LeaseDuration should be increased
// until the rate is stable and acceptably low. It's important to keep in mind
// when configuring this client that the tolerance to API latency varies inversely
// to master availability.
//
// DISCLAIMER: this is an alpha API. This library will likely change significantly
// or even be removed entirely in subsequent releases. Depend on this API at
// your own risk.
package leaderelection
import (
"context"
"fmt"
"reflect"
"time"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/clock"
"k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/apimachinery/pkg/util/wait"
rl "k8s.io/client-go/tools/leaderelection/resourcelock"
"k8s.io/klog"
)
const (
JitterFactor = 1.2
)
// NewLeaderElector creates a LeaderElector from a LeaderElectionConfig
func NewLeaderElector(lec LeaderElectionConfig) (*LeaderElector, error) {
if lec.LeaseDuration <= lec.RenewDeadline {
return nil, fmt.Errorf("leaseDuration must be greater than renewDeadline")
}
if lec.RenewDeadline <= time.Duration(JitterFactor*float64(lec.RetryPeriod)) {
return nil, fmt.Errorf("renewDeadline must be greater than retryPeriod*JitterFactor")
}
if lec.LeaseDuration < 1 {
return nil, fmt.Errorf("leaseDuration must be greater than zero")
}
if lec.RenewDeadline < 1 {
return nil, fmt.Errorf("renewDeadline must be greater than zero")
}
if lec.RetryPeriod < 1 {
return nil, fmt.Errorf("retryPeriod must be greater than zero")
}
if lec.Lock == nil {
return nil, fmt.Errorf("Lock must not be nil.")
}
return &LeaderElector{
config: lec,
clock: clock.RealClock{},
}, nil
}
type LeaderElectionConfig struct {
// Lock is the resource that will be used for locking
Lock rl.Interface
// LeaseDuration is the duration that non-leader candidates will
// wait to force acquire leadership. This is measured against time of
// last observed ack.
LeaseDuration time.Duration
// RenewDeadline is the duration that the acting master will retry
// refreshing leadership before giving up.
RenewDeadline time.Duration
// RetryPeriod is the duration the LeaderElector clients should wait
// between tries of actions.
RetryPeriod time.Duration
// Callbacks are callbacks that are triggered during certain lifecycle
// events of the LeaderElector
Callbacks LeaderCallbacks
// WatchDog is the associated health checker
// WatchDog may be null if its not needed/configured.
WatchDog *HealthzAdaptor
// Name is the name of the resource lock for debugging
Name string
}
// LeaderCallbacks are callbacks that are triggered during certain
// lifecycle events of the LeaderElector. These are invoked asynchronously.
//
// possible future callbacks:
// * OnChallenge()
type LeaderCallbacks struct {
// OnStartedLeading is called when a LeaderElector client starts leading
OnStartedLeading func(context.Context)
// OnStoppedLeading is called when a LeaderElector client stops leading
OnStoppedLeading func()
// OnNewLeader is called when the client observes a leader that is
// not the previously observed leader. This includes the first observed
// leader when the client starts.
OnNewLeader func(identity string)
}
// LeaderElector is a leader election client.
type LeaderElector struct {
config LeaderElectionConfig
// internal bookkeeping
observedRecord rl.LeaderElectionRecord
observedTime time.Time
// used to implement OnNewLeader(), may lag slightly from the
// value observedRecord.HolderIdentity if the transition has
// not yet been reported.
reportedLeader string
// clock is wrapper around time to allow for less flaky testing
clock clock.Clock
// name is the name of the resource lock for debugging
name string
}
// Run starts the leader election loop
func (le *LeaderElector) Run(ctx context.Context) {
defer func() {
runtime.HandleCrash()
le.config.Callbacks.OnStoppedLeading()
}()
if !le.acquire(ctx) {
return // ctx signalled done
}
ctx, cancel := context.WithCancel(ctx)
defer cancel()
go le.config.Callbacks.OnStartedLeading(ctx)
le.renew(ctx)
}
// RunOrDie starts a client with the provided config or panics if the config
// fails to validate.
func RunOrDie(ctx context.Context, lec LeaderElectionConfig) {
le, err := NewLeaderElector(lec)
if err != nil {
panic(err)
}
if lec.WatchDog != nil {
lec.WatchDog.SetLeaderElection(le)
}
le.Run(ctx)
}
// GetLeader returns the identity of the last observed leader or returns the empty string if
// no leader has yet been observed.
func (le *LeaderElector) GetLeader() string {
return le.observedRecord.HolderIdentity
}
// IsLeader returns true if the last observed leader was this client else returns false.
func (le *LeaderElector) IsLeader() bool {
return le.observedRecord.HolderIdentity == le.config.Lock.Identity()
}
// acquire loops calling tryAcquireOrRenew and returns true immediately when tryAcquireOrRenew succeeds.
// Returns false if ctx signals done.
func (le *LeaderElector) acquire(ctx context.Context) bool {
ctx, cancel := context.WithCancel(ctx)
defer cancel()
succeeded := false
desc := le.config.Lock.Describe()
klog.Infof("attempting to acquire leader lease %v...", desc)
wait.JitterUntil(func() {
succeeded = le.tryAcquireOrRenew()
le.maybeReportTransition()
if !succeeded {
klog.V(4).Infof("failed to acquire lease %v", desc)
return
}
le.config.Lock.RecordEvent("became leader")
klog.Infof("successfully acquired lease %v", desc)
cancel()
}, le.config.RetryPeriod, JitterFactor, true, ctx.Done())
return succeeded
}
// renew loops calling tryAcquireOrRenew and returns immediately when tryAcquireOrRenew fails or ctx signals done.
func (le *LeaderElector) renew(ctx context.Context) {
ctx, cancel := context.WithCancel(ctx)
defer cancel()
wait.Until(func() {
timeoutCtx, timeoutCancel := context.WithTimeout(ctx, le.config.RenewDeadline)
defer timeoutCancel()
err := wait.PollImmediateUntil(le.config.RetryPeriod, func() (bool, error) {
done := make(chan bool, 1)
go func() {
defer close(done)
done <- le.tryAcquireOrRenew()
}()
select {
case <-timeoutCtx.Done():
return false, fmt.Errorf("failed to tryAcquireOrRenew %s", timeoutCtx.Err())
case result := <-done:
return result, nil
}
}, timeoutCtx.Done())
le.maybeReportTransition()
desc := le.config.Lock.Describe()
if err == nil {
klog.V(5).Infof("successfully renewed lease %v", desc)
return
}
le.config.Lock.RecordEvent("stopped leading")
klog.Infof("failed to renew lease %v: %v", desc, err)
cancel()
}, le.config.RetryPeriod, ctx.Done())
}
// tryAcquireOrRenew tries to acquire a leader lease if it is not already acquired,
// else it tries to renew the lease if it has already been acquired. Returns true
// on success else returns false.
func (le *LeaderElector) tryAcquireOrRenew() bool {
now := metav1.Now()
leaderElectionRecord := rl.LeaderElectionRecord{
HolderIdentity: le.config.Lock.Identity(),
LeaseDurationSeconds: int(le.config.LeaseDuration / time.Second),
RenewTime: now,
AcquireTime: now,
}
// 1. obtain or create the ElectionRecord
oldLeaderElectionRecord, err := le.config.Lock.Get()
if err != nil {
if !errors.IsNotFound(err) {
klog.Errorf("error retrieving resource lock %v: %v", le.config.Lock.Describe(), err)
return false
}
if err = le.config.Lock.Create(leaderElectionRecord); err != nil {
klog.Errorf("error initially creating leader election record: %v", err)
return false
}
le.observedRecord = leaderElectionRecord
le.observedTime = le.clock.Now()
return true
}
// 2. Record obtained, check the Identity & Time
if !reflect.DeepEqual(le.observedRecord, *oldLeaderElectionRecord) {
le.observedRecord = *oldLeaderElectionRecord
le.observedTime = le.clock.Now()
}
if le.observedTime.Add(le.config.LeaseDuration).After(now.Time) &&
!le.IsLeader() {
klog.V(4).Infof("lock is held by %v and has not yet expired", oldLeaderElectionRecord.HolderIdentity)
return false
}
// 3. We're going to try to update. The leaderElectionRecord is set to it's default
// here. Let's correct it before updating.
if le.IsLeader() {
leaderElectionRecord.AcquireTime = oldLeaderElectionRecord.AcquireTime
leaderElectionRecord.LeaderTransitions = oldLeaderElectionRecord.LeaderTransitions
} else {
leaderElectionRecord.LeaderTransitions = oldLeaderElectionRecord.LeaderTransitions + 1
}
// update the lock itself
if err = le.config.Lock.Update(leaderElectionRecord); err != nil {
klog.Errorf("Failed to update lock: %v", err)
return false
}
le.observedRecord = leaderElectionRecord
le.observedTime = le.clock.Now()
return true
}
func (le *LeaderElector) maybeReportTransition() {
if le.observedRecord.HolderIdentity == le.reportedLeader {
return
}
le.reportedLeader = le.observedRecord.HolderIdentity
if le.config.Callbacks.OnNewLeader != nil {
go le.config.Callbacks.OnNewLeader(le.reportedLeader)
}
}
// Check will determine if the current lease is expired by more than timeout.
func (le *LeaderElector) Check(maxTolerableExpiredLease time.Duration) error {
if !le.IsLeader() {
// Currently not concerned with the case that we are hot standby
return nil
}
// If we are more than timeout seconds after the lease duration that is past the timeout
// on the lease renew. Time to start reporting ourselves as unhealthy. We should have
// died but conditions like deadlock can prevent this. (See #70819)
if le.clock.Since(le.observedTime) > le.config.LeaseDuration+maxTolerableExpiredLease {
return fmt.Errorf("failed election to renew leadership on lease %s", le.config.Name)
}
return nil
}

294
vendor/k8s.io/client-go/tools/leaderelection/leaderelection_test.go generated vendored
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@@ -1,294 +0,0 @@
/*
Copyright 2015 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 leaderelection
import (
"fmt"
"sync"
"testing"
"time"
"k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/clock"
fakecorev1 "k8s.io/client-go/kubernetes/typed/core/v1/fake"
core "k8s.io/client-go/testing"
rl "k8s.io/client-go/tools/leaderelection/resourcelock"
"k8s.io/client-go/tools/record"
)
func createLockObject(objectType string, objectMeta metav1.ObjectMeta) (obj runtime.Object) {
switch objectType {
case "endpoints":
obj = &v1.Endpoints{ObjectMeta: objectMeta}
case "configmaps":
obj = &v1.ConfigMap{ObjectMeta: objectMeta}
default:
panic("unexpected objType:" + objectType)
}
return
}
// Will test leader election using endpoints as the resource
func TestTryAcquireOrRenewEndpoints(t *testing.T) {
testTryAcquireOrRenew(t, "endpoints")
}
func testTryAcquireOrRenew(t *testing.T, objectType string) {
future := time.Now().Add(1000 * time.Hour)
past := time.Now().Add(-1000 * time.Hour)
tests := []struct {
observedRecord rl.LeaderElectionRecord
observedTime time.Time
reactors []struct {
verb string
reaction core.ReactionFunc
}
expectSuccess bool
transitionLeader bool
outHolder string
}{
// acquire from no object
{
reactors: []struct {
verb string
reaction core.ReactionFunc
}{
{
verb: "get",
reaction: func(action core.Action) (handled bool, ret runtime.Object, err error) {
return true, nil, errors.NewNotFound(action.(core.GetAction).GetResource().GroupResource(), action.(core.GetAction).GetName())
},
},
{
verb: "create",
reaction: func(action core.Action) (handled bool, ret runtime.Object, err error) {
return true, action.(core.CreateAction).GetObject(), nil
},
},
},
expectSuccess: true,
outHolder: "baz",
},
// acquire from unled object
{
reactors: []struct {
verb string
reaction core.ReactionFunc
}{
{
verb: "get",
reaction: func(action core.Action) (handled bool, ret runtime.Object, err error) {
objectMeta := metav1.ObjectMeta{
Namespace: action.GetNamespace(),
Name: action.(core.GetAction).GetName(),
}
return true, createLockObject(objectType, objectMeta), nil
},
},
{
verb: "update",
reaction: func(action core.Action) (handled bool, ret runtime.Object, err error) {
return true, action.(core.CreateAction).GetObject(), nil
},
},
},
expectSuccess: true,
transitionLeader: true,
outHolder: "baz",
},
// acquire from led, unacked object
{
reactors: []struct {
verb string
reaction core.ReactionFunc
}{
{
verb: "get",
reaction: func(action core.Action) (handled bool, ret runtime.Object, err error) {
objectMeta := metav1.ObjectMeta{
Namespace: action.GetNamespace(),
Name: action.(core.GetAction).GetName(),
Annotations: map[string]string{
rl.LeaderElectionRecordAnnotationKey: `{"holderIdentity":"bing"}`,
},
}
return true, createLockObject(objectType, objectMeta), nil
},
},
{
verb: "update",
reaction: func(action core.Action) (handled bool, ret runtime.Object, err error) {
return true, action.(core.CreateAction).GetObject(), nil
},
},
},
observedRecord: rl.LeaderElectionRecord{HolderIdentity: "bing"},
observedTime: past,
expectSuccess: true,
transitionLeader: true,
outHolder: "baz",
},
// don't acquire from led, acked object
{
reactors: []struct {
verb string
reaction core.ReactionFunc
}{
{
verb: "get",
reaction: func(action core.Action) (handled bool, ret runtime.Object, err error) {
objectMeta := metav1.ObjectMeta{
Namespace: action.GetNamespace(),
Name: action.(core.GetAction).GetName(),
Annotations: map[string]string{
rl.LeaderElectionRecordAnnotationKey: `{"holderIdentity":"bing"}`,
},
}
return true, createLockObject(objectType, objectMeta), nil
},
},
},
observedTime: future,
expectSuccess: false,
outHolder: "bing",
},
// renew already acquired object
{
reactors: []struct {
verb string
reaction core.ReactionFunc
}{
{
verb: "get",
reaction: func(action core.Action) (handled bool, ret runtime.Object, err error) {
objectMeta := metav1.ObjectMeta{
Namespace: action.GetNamespace(),
Name: action.(core.GetAction).GetName(),
Annotations: map[string]string{
rl.LeaderElectionRecordAnnotationKey: `{"holderIdentity":"baz"}`,
},
}
return true, createLockObject(objectType, objectMeta), nil
},
},
{
verb: "update",
reaction: func(action core.Action) (handled bool, ret runtime.Object, err error) {
return true, action.(core.CreateAction).GetObject(), nil
},
},
},
observedTime: future,
observedRecord: rl.LeaderElectionRecord{HolderIdentity: "baz"},
expectSuccess: true,
outHolder: "baz",
},
}
for i, test := range tests {
// OnNewLeader is called async so we have to wait for it.
var wg sync.WaitGroup
wg.Add(1)
var reportedLeader string
var lock rl.Interface
objectMeta := metav1.ObjectMeta{Namespace: "foo", Name: "bar"}
resourceLockConfig := rl.ResourceLockConfig{
Identity: "baz",
EventRecorder: &record.FakeRecorder{},
}
c := &fakecorev1.FakeCoreV1{Fake: &core.Fake{}}
for _, reactor := range test.reactors {
c.AddReactor(reactor.verb, objectType, reactor.reaction)
}
c.AddReactor("*", "*", func(action core.Action) (bool, runtime.Object, error) {
t.Errorf("[%v] unreachable action. testclient called too many times: %+v", i, action)
return true, nil, fmt.Errorf("unreachable action")
})
switch objectType {
case "endpoints":
lock = &rl.EndpointsLock{
EndpointsMeta: objectMeta,
LockConfig: resourceLockConfig,
Client: c,
}
case "configmaps":
lock = &rl.ConfigMapLock{
ConfigMapMeta: objectMeta,
LockConfig: resourceLockConfig,
Client: c,
}
}
lec := LeaderElectionConfig{
Lock: lock,
LeaseDuration: 10 * time.Second,
Callbacks: LeaderCallbacks{
OnNewLeader: func(l string) {
defer wg.Done()
reportedLeader = l
},
},
}
le := &LeaderElector{
config: lec,
observedRecord: test.observedRecord,
observedTime: test.observedTime,
clock: clock.RealClock{},
}
if test.expectSuccess != le.tryAcquireOrRenew() {
t.Errorf("[%v]unexpected result of tryAcquireOrRenew: [succeeded=%v]", i, !test.expectSuccess)
}
le.observedRecord.AcquireTime = metav1.Time{}
le.observedRecord.RenewTime = metav1.Time{}
if le.observedRecord.HolderIdentity != test.outHolder {
t.Errorf("[%v]expected holder:\n\t%+v\ngot:\n\t%+v", i, test.outHolder, le.observedRecord.HolderIdentity)
}
if len(test.reactors) != len(c.Actions()) {
t.Errorf("[%v]wrong number of api interactions", i)
}
if test.transitionLeader && le.observedRecord.LeaderTransitions != 1 {
t.Errorf("[%v]leader should have transitioned but did not", i)
}
if !test.transitionLeader && le.observedRecord.LeaderTransitions != 0 {
t.Errorf("[%v]leader should not have transitioned but did", i)
}
le.maybeReportTransition()
wg.Wait()
if reportedLeader != test.outHolder {
t.Errorf("[%v]reported leader was not the new leader. expected %q, got %q", i, test.outHolder, reportedLeader)
}
}
}
// Will test leader election using configmap as the resource
func TestTryAcquireOrRenewConfigMaps(t *testing.T) {
testTryAcquireOrRenew(t, "configmaps")
}

109
vendor/k8s.io/client-go/tools/leaderelection/resourcelock/configmaplock.go generated vendored
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@@ -1,109 +0,0 @@
/*
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 (
"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() (*LeaderElectionRecord, error) {
var record LeaderElectionRecord
var err error
cml.cm, err = cml.Client.ConfigMaps(cml.ConfigMapMeta.Namespace).Get(cml.ConfigMapMeta.Name, metav1.GetOptions{})
if err != nil {
return nil, err
}
if cml.cm.Annotations == nil {
cml.cm.Annotations = make(map[string]string)
}
if recordBytes, found := cml.cm.Annotations[LeaderElectionRecordAnnotationKey]; found {
if err := json.Unmarshal([]byte(recordBytes), &record); err != nil {
return nil, err
}
}
return &record, nil
}
// Create attempts to create a LeaderElectionRecord annotation
func (cml *ConfigMapLock) Create(ler LeaderElectionRecord) error {
recordBytes, err := json.Marshal(ler)
if err != nil {
return err
}
cml.cm, err = cml.Client.ConfigMaps(cml.ConfigMapMeta.Namespace).Create(&v1.ConfigMap{
ObjectMeta: metav1.ObjectMeta{
Name: cml.ConfigMapMeta.Name,
Namespace: cml.ConfigMapMeta.Namespace,
Annotations: map[string]string{
LeaderElectionRecordAnnotationKey: string(recordBytes),
},
},
})
return err
}
// Update will update an existing annotation on a given resource.
func (cml *ConfigMapLock) Update(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
}
cml.cm.Annotations[LeaderElectionRecordAnnotationKey] = string(recordBytes)
cml.cm, err = cml.Client.ConfigMaps(cml.ConfigMapMeta.Namespace).Update(cml.cm)
return err
}
// RecordEvent in leader election while adding meta-data
func (cml *ConfigMapLock) RecordEvent(s string) {
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)
}
// returns the Identity of the lock
func (cml *ConfigMapLock) Identity() string {
return cml.LockConfig.Identity
}

104
vendor/k8s.io/client-go/tools/leaderelection/resourcelock/endpointslock.go generated vendored
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@@ -1,104 +0,0 @@
/*
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 (
"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() (*LeaderElectionRecord, error) {
var record LeaderElectionRecord
var err error
el.e, err = el.Client.Endpoints(el.EndpointsMeta.Namespace).Get(el.EndpointsMeta.Name, metav1.GetOptions{})
if err != nil {
return nil, err
}
if el.e.Annotations == nil {
el.e.Annotations = make(map[string]string)
}
if recordBytes, found := el.e.Annotations[LeaderElectionRecordAnnotationKey]; found {
if err := json.Unmarshal([]byte(recordBytes), &record); err != nil {
return nil, err
}
}
return &record, nil
}
// Create attempts to create a LeaderElectionRecord annotation
func (el *EndpointsLock) Create(ler LeaderElectionRecord) error {
recordBytes, err := json.Marshal(ler)
if err != nil {
return err
}
el.e, err = el.Client.Endpoints(el.EndpointsMeta.Namespace).Create(&v1.Endpoints{
ObjectMeta: metav1.ObjectMeta{
Name: el.EndpointsMeta.Name,
Namespace: el.EndpointsMeta.Namespace,
Annotations: map[string]string{
LeaderElectionRecordAnnotationKey: string(recordBytes),
},
},
})
return err
}
// Update will update and existing annotation on a given resource.
func (el *EndpointsLock) Update(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
}
el.e.Annotations[LeaderElectionRecordAnnotationKey] = string(recordBytes)
el.e, err = el.Client.Endpoints(el.EndpointsMeta.Namespace).Update(el.e)
return err
}
// RecordEvent in leader election while adding meta-data
func (el *EndpointsLock) RecordEvent(s string) {
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)
}
// returns the Identity of the lock
func (el *EndpointsLock) Identity() string {
return el.LockConfig.Identity
}

102
vendor/k8s.io/client-go/tools/leaderelection/resourcelock/interface.go generated vendored
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@@ -1,102 +0,0 @@
/*
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 (
"fmt"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
corev1 "k8s.io/client-go/kubernetes/typed/core/v1"
"k8s.io/client-go/tools/record"
)
const (
LeaderElectionRecordAnnotationKey = "control-plane.alpha.kubernetes.io/leader"
EndpointsResourceLock = "endpoints"
ConfigMapsResourceLock = "configmaps"
)
// 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 string `json:"holderIdentity"`
LeaseDurationSeconds int `json:"leaseDurationSeconds"`
AcquireTime metav1.Time `json:"acquireTime"`
RenewTime metav1.Time `json:"renewTime"`
LeaderTransitions int `json:"leaderTransitions"`
}
// ResourceLockConfig common data that exists across different
// resource locks
type ResourceLockConfig struct {
Identity string
EventRecorder record.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() (*LeaderElectionRecord, error)
// Create attempts to create a LeaderElectionRecord
Create(ler LeaderElectionRecord) error
// Update will update and existing LeaderElectionRecord
Update(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, client corev1.CoreV1Interface, rlc ResourceLockConfig) (Interface, error) {
switch lockType {
case EndpointsResourceLock:
return &EndpointsLock{
EndpointsMeta: metav1.ObjectMeta{
Namespace: ns,
Name: name,
},
Client: client,
LockConfig: rlc,
}, nil
case ConfigMapsResourceLock:
return &ConfigMapLock{
ConfigMapMeta: metav1.ObjectMeta{
Namespace: ns,
Name: name,
},
Client: client,
LockConfig: rlc,
}, nil
default:
return nil, fmt.Errorf("Invalid lock-type %s", lockType)
}
}