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WIP: start to create kube-cert-agent pods in namespace

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Signed-off-by: Andrew Keesler <akeesler@vmware.com>
This commit is contained in:
Andrew Keesler 2020-09-21 16:27:00 -04:00
parent e18b6fdddc
commit 50258fc569
No known key found for this signature in database
GPG Key ID: 27CE0444346F9413
5 changed files with 134 additions and 103 deletions
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39
internal/controller/kubecertagent/creater.go
View File

@ -17,9 +17,10 @@ import (
)
type createrController struct {
agentInfo *Info
k8sClient kubernetes.Interface
podInformer corev1informers.PodInformer
agentInfo *Info
k8sClient kubernetes.Interface
kubeSystemPodInformer corev1informers.PodInformer
agentPodInformer corev1informers.PodInformer
}
// NewCreaterController returns a controller that creates new kube-cert-agent pods for every known
@ -29,7 +30,8 @@ type createrController struct {
func NewCreaterController(
agentInfo *Info,
k8sClient kubernetes.Interface,
podInformer corev1informers.PodInformer,
kubeSystemPodInformer corev1informers.PodInformer,
agentPodInformer corev1informers.PodInformer,
withInformer pinnipedcontroller.WithInformerOptionFunc,
) controllerlib.Controller {
return controllerlib.New(
@ -37,15 +39,23 @@ func NewCreaterController(
//nolint: misspell
Name: "kube-cert-agent-creater-controller",
Syncer: &createrController{
agentInfo: agentInfo,
k8sClient: k8sClient,
podInformer: podInformer,
agentInfo: agentInfo,
k8sClient: k8sClient,
kubeSystemPodInformer: kubeSystemPodInformer,
agentPodInformer: agentPodInformer,
},
},
withInformer(
podInformer,
kubeSystemPodInformer,
pinnipedcontroller.SimpleFilter(func(obj metav1.Object) bool {
return isControllerManagerPod(obj) || isAgentPod(obj, agentInfo.Template.Labels)
return isControllerManagerPod(obj)
}),
controllerlib.InformerOption{},
),
withInformer(
agentPodInformer,
pinnipedcontroller.SimpleFilter(func(obj metav1.Object) bool {
return isAgentPod(obj, agentInfo.Template.Labels)
}),
controllerlib.InformerOption{},
),
@ -59,13 +69,18 @@ func (c *createrController) Sync(ctx controllerlib.Context) error {
return fmt.Errorf("cannot create controller manager selector: %w", err)
}
controllerManagerPods, err := c.podInformer.Lister().List(controllerManagerSelector)
controllerManagerPods, err := c.kubeSystemPodInformer.Lister().List(controllerManagerSelector)
if err != nil {
return fmt.Errorf("informer cannot list controller manager pods: %w", err)
}
for _, controllerManagerPod := range controllerManagerPods {
agentPod, err := findAgentPod(controllerManagerPod, c.podInformer, c.agentInfo.Template.Labels)
agentPod, err := findAgentPod(
controllerManagerPod,
c.kubeSystemPodInformer,
c.agentPodInformer,
c.agentInfo.Template.Labels,
)
if err != nil {
return err
}
@ -80,7 +95,7 @@ func (c *createrController) Sync(ctx controllerlib.Context) error {
klog.KObj(controllerManagerPod),
)
_, err := c.k8sClient.CoreV1().
Pods(ControllerManagerNamespace).
Pods(c.agentInfo.Template.Namespace).
Create(ctx.Context, agentPod, metav1.CreateOptions{})
if err != nil {
return fmt.Errorf("cannot create agent pod: %w", err)

68
internal/controller/kubecertagent/creater_test.go
View File

@ -30,7 +30,8 @@ func TestCreaterControllerFilter(t *testing.T) {
"CreaterControllerFilter",
func(
agentPodTemplate *corev1.Pod,
podsInformer corev1informers.PodInformer,
kubeSystemPodInformer corev1informers.PodInformer,
//agentPodInformer corev1informers.PodInformer,
observableWithInformerOption *testutil.ObservableWithInformerOption,
) {
_ = NewCreaterController(
@ -38,7 +39,8 @@ func TestCreaterControllerFilter(t *testing.T) {
Template: agentPodTemplate,
},
nil, // k8sClient, shouldn't matter
podsInformer,
kubeSystemPodInformer,
nil, //agentPodInformer,
observableWithInformerOption.WithInformer,
)
},
@ -53,15 +55,18 @@ func TestCreaterControllerSync(t *testing.T) {
var subject controllerlib.Controller
var kubeAPIClient *kubernetesfake.Clientset
var kubeInformerClient *kubernetesfake.Clientset
var kubeInformers kubeinformers.SharedInformerFactory
var kubeSystemInformerClient *kubernetesfake.Clientset
var kubeSystemInformers kubeinformers.SharedInformerFactory
var agentInformerClient *kubernetesfake.Clientset
var agentInformers kubeinformers.SharedInformerFactory
var timeoutContext context.Context
var timeoutContextCancel context.CancelFunc
var syncContext *controllerlib.Context
agentPodTemplate := &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "some-agent-name-",
Namespace: "some-agent-namespace",
Name: "some-agent-name-",
Labels: map[string]string{
"some-label-key": "some-label-value",
},
@ -117,17 +122,10 @@ func TestCreaterControllerSync(t *testing.T) {
// fnv 32a hash of controller-manager uid
controllerManagerPodHash := "fbb0addd"
agentPod := agentPodTemplate.DeepCopy()
agentPod.Namespace = kubeSystemNamespace
agentPod.Name += controllerManagerPodHash
agentPod.OwnerReferences = []metav1.OwnerReference{
{
APIVersion: "v1",
Kind: "Pod",
Name: controllerManagerPod.Name,
UID: controllerManagerPod.UID,
Controller: boolPtr(true),
BlockOwnerDeletion: boolPtr(true),
},
agentPod.Annotations = map[string]string{
"kube-cert-agent.pinniped.dev/controller-manager-name": controllerManagerPod.Name,
"kube-cert-agent.pinniped.dev/controller-manager-uid": string(controllerManagerPod.UID),
}
agentPod.Spec.Containers[0].VolumeMounts = controllerManagerPod.Spec.Containers[0].VolumeMounts
agentPod.Spec.RestartPolicy = corev1.RestartPolicyNever
@ -151,7 +149,8 @@ func TestCreaterControllerSync(t *testing.T) {
Template: agentPodTemplate,
},
kubeAPIClient,
kubeInformers.Core().V1().Pods(),
kubeSystemInformers.Core().V1().Pods(),
agentInformers.Core().V1().Pods(),
controllerlib.WithInformer,
)
@ -166,32 +165,39 @@ func TestCreaterControllerSync(t *testing.T) {
}
// Must start informers before calling TestRunSynchronously()
kubeInformers.Start(timeoutContext.Done())
kubeSystemInformers.Start(timeoutContext.Done())
agentInformers.Start(timeoutContext.Done())
controllerlib.TestRunSynchronously(t, subject)
}
it.Before(func() {
r = require.New(t)
timeoutContext, timeoutContextCancel = context.WithTimeout(context.Background(), time.Second*3)
kubeInformerClient = kubernetesfake.NewSimpleClientset()
kubeInformers = kubeinformers.NewSharedInformerFactory(kubeInformerClient, 0)
kubeAPIClient = kubernetesfake.NewSimpleClientset()
kubeSystemInformerClient = kubernetesfake.NewSimpleClientset()
kubeSystemInformers = kubeinformers.NewSharedInformerFactory(kubeSystemInformerClient, 0)
agentInformerClient = kubernetesfake.NewSimpleClientset()
agentInformers = kubeinformers.NewSharedInformerFactory(agentInformerClient, 0)
timeoutContext, timeoutContextCancel = context.WithTimeout(context.Background(), time.Second*3)
// Add a pod into the test that doesn't matter to make sure we don't accidentally trigger any
// logic on this thing.
ignorablePod := corev1.Pod{}
ignorablePod.Name = "some-ignorable-pod"
r.NoError(kubeInformerClient.Tracker().Add(&ignorablePod))
r.NoError(kubeSystemInformerClient.Tracker().Add(&ignorablePod))
r.NoError(kubeAPIClient.Tracker().Add(&ignorablePod))
// Add another valid agent pod to make sure our logic works for just the pod we care about.
otherAgentPod := agentPod.DeepCopy()
otherAgentPod.Name = "some-other-agent"
otherAgentPod.OwnerReferences[0].Name = "some-other-controller-manager-name"
otherAgentPod.OwnerReferences[0].UID = "some-other-controller-manager-uid"
r.NoError(kubeInformerClient.Tracker().Add(otherAgentPod))
otherAgentPod.Annotations = map[string]string{
"kube-cert-agent.pinniped.dev/controller-manager-name": "some-other-controller-manager-name",
"kube-cert-agent.pinniped.dev/controller-manager-uid": "some-other-controller-manager-uid",
}
r.NoError(agentInformerClient.Tracker().Add(otherAgentPod))
r.NoError(kubeAPIClient.Tracker().Add(otherAgentPod))
})
@ -201,13 +207,13 @@ func TestCreaterControllerSync(t *testing.T) {
when("there is a controller manager pod", func() {
it.Before(func() {
r.NoError(kubeInformerClient.Tracker().Add(controllerManagerPod))
r.NoError(kubeSystemInformerClient.Tracker().Add(controllerManagerPod))
r.NoError(kubeAPIClient.Tracker().Add(controllerManagerPod))
})
when("there is a matching agent pod", func() {
it.Before(func() {
r.NoError(kubeInformerClient.Tracker().Add(agentPod))
r.NoError(agentInformerClient.Tracker().Add(agentPod))
r.NoError(kubeAPIClient.Tracker().Add(agentPod))
})
@ -227,8 +233,8 @@ func TestCreaterControllerSync(t *testing.T) {
it.Before(func() {
nonMatchingAgentPod := agentPod.DeepCopy()
nonMatchingAgentPod.Name = "some-agent-name-85da432e"
nonMatchingAgentPod.OwnerReferences[0].UID = "some-non-matching-uid"
r.NoError(kubeInformerClient.Tracker().Add(nonMatchingAgentPod))
nonMatchingAgentPod.Annotations[controllerManagerUIDAnnotationKey] = "some-non-matching-uid"
r.NoError(agentInformerClient.Tracker().Add(nonMatchingAgentPod))
r.NoError(kubeAPIClient.Tracker().Add(nonMatchingAgentPod))
})
@ -241,7 +247,7 @@ func TestCreaterControllerSync(t *testing.T) {
[]coretesting.Action{
coretesting.NewCreateAction(
podsGVR,
kubeSystemNamespace,
agentPod.Namespace,
agentPod,
),
},
@ -260,7 +266,7 @@ func TestCreaterControllerSync(t *testing.T) {
[]coretesting.Action{
coretesting.NewCreateAction(
podsGVR,
kubeSystemNamespace,
agentPod.Namespace,
agentPod,
),
},

23
internal/controller/kubecertagent/deleter.go
View File

@ -17,9 +17,10 @@ import (
)
type deleterController struct {
agentInfo *Info
k8sClient kubernetes.Interface
podInformer corev1informers.PodInformer
agentInfo *Info
k8sClient kubernetes.Interface
kubeSystemPodInformer corev1informers.PodInformer
agentPodInformer corev1informers.PodInformer
}
// NewDeleterController returns a controller that deletes any kube-cert-agent pods that are out of
@ -29,20 +30,22 @@ type deleterController struct {
func NewDeleterController(
agentInfo *Info,
k8sClient kubernetes.Interface,
podInformer corev1informers.PodInformer,
kubeSystemPodInformer corev1informers.PodInformer,
agentPodInformer corev1informers.PodInformer,
withInformer pinnipedcontroller.WithInformerOptionFunc,
) controllerlib.Controller {
return controllerlib.New(
controllerlib.Config{
Name: "kube-cert-agent-deleter-controller",
Syncer: &deleterController{
agentInfo: agentInfo,
k8sClient: k8sClient,
podInformer: podInformer,
agentInfo: agentInfo,
k8sClient: k8sClient,
kubeSystemPodInformer: kubeSystemPodInformer,
agentPodInformer: agentPodInformer,
},
},
withInformer(
podInformer,
agentPodInformer,
pinnipedcontroller.SimpleFilter(func(obj metav1.Object) bool {
return isControllerManagerPod(obj) || isAgentPod(obj, agentInfo.Template.Labels)
}),
@ -54,7 +57,7 @@ func NewDeleterController(
// Sync implements controllerlib.Syncer.
func (c *deleterController) Sync(ctx controllerlib.Context) error {
agentSelector := labels.SelectorFromSet(c.agentInfo.Template.Labels)
agentPods, err := c.podInformer.
agentPods, err := c.agentPodInformer.
Lister().
Pods(ControllerManagerNamespace).
List(agentSelector)
@ -63,7 +66,7 @@ func (c *deleterController) Sync(ctx controllerlib.Context) error {
}
for _, agentPod := range agentPods {
controllerManagerPod, err := findControllerManagerPod(agentPod, c.podInformer)
controllerManagerPod, err := findControllerManagerPod(agentPod, c.kubeSystemPodInformer)
if err != nil {
return err
}

56
internal/controller/kubecertagent/deleter_test.go
View File

@ -53,8 +53,10 @@ func TestDeleterControllerSync(t *testing.T) {
var subject controllerlib.Controller
var kubeAPIClient *kubernetesfake.Clientset
var kubeInformerClient *kubernetesfake.Clientset
var kubeInformers kubeinformers.SharedInformerFactory
var kubeSystemInformerClient *kubernetesfake.Clientset
var kubeSystemInformers kubeinformers.SharedInformerFactory
var agentInformerClient *kubernetesfake.Clientset
var agentInformers kubeinformers.SharedInformerFactory
var timeoutContext context.Context
var timeoutContextCancel context.CancelFunc
var syncContext *controllerlib.Context
@ -125,15 +127,9 @@ func TestDeleterControllerSync(t *testing.T) {
agentPod := agentPodTemplate.DeepCopy()
agentPod.Namespace = kubeSystemNamespace
agentPod.Name += controllerManagerPodHash
agentPod.OwnerReferences = []metav1.OwnerReference{
{
APIVersion: "v1",
Kind: "Pod",
Name: controllerManagerPod.Name,
UID: controllerManagerPod.UID,
Controller: boolPtr(true),
BlockOwnerDeletion: boolPtr(true),
},
agentPod.Annotations = map[string]string{
"kube-cert-agent.pinniped.dev/controller-manager-name": controllerManagerPod.Name,
"kube-cert-agent.pinniped.dev/controller-manager-uid": string(controllerManagerPod.UID),
}
agentPod.Spec.Containers[0].VolumeMounts = controllerManagerPod.Spec.Containers[0].VolumeMounts
agentPod.Spec.RestartPolicy = corev1.RestartPolicyNever
@ -151,7 +147,8 @@ func TestDeleterControllerSync(t *testing.T) {
Template: agentPodTemplate,
},
kubeAPIClient,
kubeInformers.Core().V1().Pods(),
kubeSystemInformers.Core().V1().Pods(),
agentInformers.Core().V1().Pods(),
controllerlib.WithInformer,
)
@ -166,7 +163,8 @@ func TestDeleterControllerSync(t *testing.T) {
}
// Must start informers before calling TestRunSynchronously()
kubeInformers.Start(timeoutContext.Done())
kubeSystemInformers.Start(timeoutContext.Done())
agentInformers.Start(timeoutContext.Done())
controllerlib.TestRunSynchronously(t, subject)
}
@ -175,15 +173,19 @@ func TestDeleterControllerSync(t *testing.T) {
timeoutContext, timeoutContextCancel = context.WithTimeout(context.Background(), time.Second*3)
kubeInformerClient = kubernetesfake.NewSimpleClientset()
kubeInformers = kubeinformers.NewSharedInformerFactory(kubeInformerClient, 0)
kubeAPIClient = kubernetesfake.NewSimpleClientset()
kubeSystemInformerClient = kubernetesfake.NewSimpleClientset()
kubeSystemInformers = kubeinformers.NewSharedInformerFactory(kubeSystemInformerClient, 0)
agentInformerClient = kubernetesfake.NewSimpleClientset()
agentInformers = kubeinformers.NewSharedInformerFactory(agentInformerClient, 0)
// Add an pod into the test that doesn't matter to make sure we don't accidentally
// trigger any logic on this thing.
ignorablePod := corev1.Pod{}
ignorablePod.Name = "some-ignorable-pod"
r.NoError(kubeInformerClient.Tracker().Add(&ignorablePod))
r.NoError(agentInformerClient.Tracker().Add(&ignorablePod))
r.NoError(kubeAPIClient.Tracker().Add(&ignorablePod))
})
@ -193,13 +195,13 @@ func TestDeleterControllerSync(t *testing.T) {
when("there is an agent pod", func() {
it.Before(func() {
r.NoError(kubeInformerClient.Tracker().Add(agentPod))
r.NoError(agentInformerClient.Tracker().Add(agentPod))
r.NoError(kubeAPIClient.Tracker().Add(agentPod))
})
when("there is a matching controller manager pod", func() {
it.Before(func() {
r.NoError(kubeInformerClient.Tracker().Add(controllerManagerPod))
r.NoError(kubeSystemInformerClient.Tracker().Add(controllerManagerPod))
r.NoError(kubeAPIClient.Tracker().Add(controllerManagerPod))
})
@ -218,7 +220,7 @@ func TestDeleterControllerSync(t *testing.T) {
when("there is a non-matching controller manager pod via uid", func() {
it.Before(func() {
controllerManagerPod.UID = "some-other-controller-manager-uid"
r.NoError(kubeInformerClient.Tracker().Add(controllerManagerPod))
r.NoError(kubeSystemInformerClient.Tracker().Add(controllerManagerPod))
r.NoError(kubeAPIClient.Tracker().Add(controllerManagerPod))
})
@ -243,7 +245,7 @@ func TestDeleterControllerSync(t *testing.T) {
when("there is a non-matching controller manager pod via name", func() {
it.Before(func() {
controllerManagerPod.Name = "some-other-controller-manager-name"
r.NoError(kubeInformerClient.Tracker().Add(controllerManagerPod))
r.NoError(kubeSystemInformerClient.Tracker().Add(controllerManagerPod))
r.NoError(kubeAPIClient.Tracker().Add(controllerManagerPod))
})
@ -272,7 +274,7 @@ func TestDeleterControllerSync(t *testing.T) {
Name: "some-other-volume-mount",
},
}
r.NoError(kubeInformerClient.Tracker().Add(controllerManagerPod))
r.NoError(kubeSystemInformerClient.Tracker().Add(controllerManagerPod))
r.NoError(kubeAPIClient.Tracker().Add(controllerManagerPod))
})
@ -301,7 +303,7 @@ func TestDeleterControllerSync(t *testing.T) {
Name: "some-other-volume",
},
}
r.NoError(kubeInformerClient.Tracker().Add(controllerManagerPod))
r.NoError(kubeSystemInformerClient.Tracker().Add(controllerManagerPod))
r.NoError(kubeAPIClient.Tracker().Add(controllerManagerPod))
})
@ -328,7 +330,7 @@ func TestDeleterControllerSync(t *testing.T) {
controllerManagerPod.Spec.NodeSelector = map[string]string{
"some-other-node-selector-key": "some-other-node-selector-value",
}
r.NoError(kubeInformerClient.Tracker().Add(controllerManagerPod))
r.NoError(kubeSystemInformerClient.Tracker().Add(controllerManagerPod))
r.NoError(kubeAPIClient.Tracker().Add(controllerManagerPod))
})
@ -353,7 +355,7 @@ func TestDeleterControllerSync(t *testing.T) {
when("the agent pod is out of sync with the controller manager via node name", func() {
it.Before(func() {
controllerManagerPod.Spec.NodeName = "some-other-node-name"
r.NoError(kubeInformerClient.Tracker().Add(controllerManagerPod))
r.NoError(kubeSystemInformerClient.Tracker().Add(controllerManagerPod))
r.NoError(kubeAPIClient.Tracker().Add(controllerManagerPod))
})
@ -382,7 +384,7 @@ func TestDeleterControllerSync(t *testing.T) {
Key: "some-other-toleration-key",
},
}
r.NoError(kubeInformerClient.Tracker().Add(controllerManagerPod))
r.NoError(kubeSystemInformerClient.Tracker().Add(controllerManagerPod))
r.NoError(kubeAPIClient.Tracker().Add(controllerManagerPod))
})
@ -408,7 +410,7 @@ func TestDeleterControllerSync(t *testing.T) {
it.Before(func() {
updatedAgentPod := agentPod.DeepCopy()
updatedAgentPod.Spec.RestartPolicy = corev1.RestartPolicyAlways
r.NoError(kubeInformerClient.Tracker().Update(podsGVR, updatedAgentPod, updatedAgentPod.Namespace))
r.NoError(kubeSystemInformerClient.Tracker().Update(podsGVR, updatedAgentPod, updatedAgentPod.Namespace))
r.NoError(kubeAPIClient.Tracker().Update(podsGVR, updatedAgentPod, updatedAgentPod.Namespace))
})
@ -433,7 +435,7 @@ func TestDeleterControllerSync(t *testing.T) {
when("the agent pod is out of sync via automount service account tokem", func() {
it.Before(func() {
agentPod.Spec.AutomountServiceAccountToken = boolPtr(true)
r.NoError(kubeInformerClient.Tracker().Update(podsGVR, agentPod, agentPod.Namespace))
r.NoError(kubeSystemInformerClient.Tracker().Update(podsGVR, agentPod, agentPod.Namespace))
r.NoError(kubeAPIClient.Tracker().Update(podsGVR, agentPod, agentPod.Namespace))
})

51
internal/controller/kubecertagent/kubecertagent.go
View File

@ -19,7 +19,6 @@ import (
k8serrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime/schema"
corev1informers "k8s.io/client-go/informers/core/v1"
"k8s.io/klog/v2"
)
@ -27,12 +26,16 @@ import (
const (
// ControllerManagerNamespace is the assumed namespace of the kube-controller-manager pod(s).
ControllerManagerNamespace = "kube-system"
controllerManagerNameAnnotationKey = "kube-cert-agent.pinniped.dev/controller-manager-name"
controllerManagerUIDAnnotationKey = "kube-cert-agent.pinniped.dev/controller-manager-uid"
)
// Info holds necessary information about the agent pod. It was pulled out into a struct to have a
// common parameter for each controller.
type Info struct {
// Template is an injection point for pod fields. The required pod fields are as follows.
// .Namespace: serves as the namespace of the agent pods
// .Name: serves as the name prefix for each of the agent pods
// .Labels: serves as a way to filter for agent pods
// .Spec.Containers[0].Image: serves as the container image for the agent pods
@ -40,11 +43,11 @@ type Info struct {
Template *corev1.Pod
// CertPathAnnotation is the name of the annotation key that will be used when setting the
// best-guess path to the kube API's certificate.
// best-guess path to the kube API's certificate in the agent pod.
CertPathAnnotation string
// KeyPathAnnotation is the name of the annotation key that will be used when setting the
// best-guess path to the kube API's private key.
// best-guess path to the kube API's private key in the agent pod.
KeyPathAnnotation string
}
@ -91,18 +94,14 @@ func newAgentPod(
agentPod.Name = fmt.Sprintf("%s%s", agentPod.Name, hash(controllerManagerPod))
// controller manager namespace because it is our owner
agentPod.Namespace = ControllerManagerNamespace
agentPod.OwnerReferences = []metav1.OwnerReference{
*metav1.NewControllerRef(
controllerManagerPod,
schema.GroupVersionKind{
Group: corev1.SchemeGroupVersion.Group,
Version: corev1.SchemeGroupVersion.Version,
Kind: "Pod",
},
),
// It would be nice to use the OwnerReferences field here, but the agent pod is most likely in a
// different namespace than the kube-controller-manager pod, and therefore that breaks the
// OwnerReferences contract (see metav1.OwnerReference doc).
if agentPod.Annotations == nil {
agentPod.Annotations = make(map[string]string)
}
agentPod.Annotations[controllerManagerNameAnnotationKey] = controllerManagerPod.Name
agentPod.Annotations[controllerManagerUIDAnnotationKey] = string(controllerManagerPod.UID)
agentPod.Spec.Containers[0].VolumeMounts = controllerManagerPod.Spec.Containers[0].VolumeMounts
agentPod.Spec.Volumes = controllerManagerPod.Spec.Volumes
@ -148,13 +147,13 @@ func isAgentPodUpToDate(actualAgentPod, expectedAgentPod *corev1.Pod) bool {
func findAgentPod(
controllerManagerPod *corev1.Pod,
informer corev1informers.PodInformer,
kubeSystemPodInformer corev1informers.PodInformer,
agentPodInformer corev1informers.PodInformer,
agentLabels map[string]string,
) (*corev1.Pod, error) {
agentSelector := labels.SelectorFromSet(agentLabels)
agentPods, err := informer.
agentPods, err := agentPodInformer.
Lister().
Pods(ControllerManagerNamespace).
List(agentSelector)
if err != nil {
return nil, fmt.Errorf("informer cannot list agent pods: %w", err)
@ -163,7 +162,7 @@ func findAgentPod(
for _, maybeAgentPod := range agentPods {
maybeControllerManagerPod, err := findControllerManagerPod(
maybeAgentPod,
informer,
kubeSystemPodInformer,
)
if err != nil {
return nil, err
@ -181,22 +180,28 @@ func findControllerManagerPod(
agentPod *corev1.Pod,
informer corev1informers.PodInformer,
) (*corev1.Pod, error) {
controller := metav1.GetControllerOf(agentPod)
if controller == nil {
klog.InfoS("found orphan agent pod", "pod", klog.KObj(agentPod))
name, ok := agentPod.Annotations[controllerManagerNameAnnotationKey]
if !ok {
klog.InfoS("agent pod missing parent name annotation", "pod", agentPod)
return nil, nil
}
uid, ok := agentPod.Annotations[controllerManagerUIDAnnotationKey]
if !ok {
klog.InfoS("agent pod missing parent uid annotation", "pod", agentPod)
return nil, nil
}
maybeControllerManagerPod, err := informer.
Lister().
Pods(ControllerManagerNamespace).
Get(controller.Name)
Get(name)
notFound := k8serrors.IsNotFound(err)
if err != nil && !notFound {
return nil, fmt.Errorf("cannot get controller pod: %w", err)
} else if notFound ||
maybeControllerManagerPod == nil ||
maybeControllerManagerPod.UID != controller.UID {
string(maybeControllerManagerPod.UID) != uid {
return nil, nil
}