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/
controller.go
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/
controller.go
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package bundlec
import (
"context"
"sync"
"time"
"github.com/ash2k/stager/wait"
"github.com/atlassian/ctrl"
"github.com/atlassian/ctrl/handlers"
"github.com/atlassian/ctrl/logz"
smith_v1 "github.com/atlassian/smith/pkg/apis/smith/v1"
smithClient_v1 "github.com/atlassian/smith/pkg/client/clientset_generated/clientset/typed/smith/v1"
"github.com/atlassian/smith/pkg/plugin"
"github.com/atlassian/smith/pkg/statuschecker"
"github.com/atlassian/smith/pkg/store"
sc_v1b1 "github.com/kubernetes-incubator/service-catalog/pkg/apis/servicecatalog/v1beta1"
"github.com/pkg/errors"
"github.com/prometheus/client_golang/prometheus"
"go.uber.org/zap"
apps_v1 "k8s.io/api/apps/v1"
core_v1 "k8s.io/api/core/v1"
meta_v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/client-go/kubernetes"
core_v1_client "k8s.io/client-go/kubernetes/typed/core/v1"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/record"
)
const (
byConfigMapNamespaceNameIndexName = "ByConfigMap"
bySecretNamespaceNameIndexName = "BySecret"
)
type byIndexFunc func(indexName, indexKey string) ([]interface{}, error)
type indexKeyFunc func(namespace, name string) string
type Controller struct {
// wg.Wait() is called from Run() and first wg.Add() may be called concurrently from CRD listener
// to start an Informer. This is a data race. This mutex is used to ensure ordering.
// See https://github.com/atlassian/smith/issues/156
// See https://github.com/golang/go/blob/fbc8973a6bc88b50509ea738f475b36ef756bf90/src/sync/waitgroup.go#L123-L126
wgLock sync.Mutex
wg wait.Group
stopping bool
crdContext context.Context
crdContextCancel context.CancelFunc
Logger *zap.Logger
ReadyForWork func()
MainClient kubernetes.Interface
BundleClient smithClient_v1.BundlesGetter
BundleStore BundleStore
SmartClient SmartClient
Rc statuschecker.Interface
Store Store
SpecChecker SpecChecker
WorkQueue ctrl.WorkQueueProducer
// CRD
CrdResyncPeriod time.Duration
Namespace string
PluginContainers map[smith_v1.PluginName]plugin.Container
Scheme *runtime.Scheme
Catalog *store.Catalog
// Metrics
BundleTransitionCounter *prometheus.CounterVec
BundleResourceTransitionCounter *prometheus.CounterVec
Broadcaster record.EventBroadcaster
Recorder record.EventRecorder
}
// Prepare prepares the controller to be run.
func (c *Controller) Prepare(crdInf cache.SharedIndexInformer, resourceInfs map[schema.GroupVersionKind]cache.SharedIndexInformer) error {
c.crdContext, c.crdContextCancel = context.WithCancel(context.Background())
crdInf.AddEventHandler(&crdEventHandler{
controller: c,
watchers: make(map[string]watchState),
})
deploymentInf := resourceInfs[apps_v1.SchemeGroupVersion.WithKind("Deployment")]
err := deploymentInf.AddIndexers(cache.Indexers{
byConfigMapNamespaceNameIndexName: deploymentByConfigMapNamespaceNameIndex,
bySecretNamespaceNameIndexName: deploymentBySecretNamespaceNameIndex,
})
if err != nil {
return errors.WithStack(err)
}
deploymentByIndex := deploymentInf.GetIndexer().ByIndex
// ConfigMap -> Deployment -> Bundle event propagation
configMapGVK := core_v1.SchemeGroupVersion.WithKind("ConfigMap")
configMapInf := resourceInfs[configMapGVK]
configMapInf.AddEventHandler(&handlers.LookupHandler{
Logger: c.Logger,
WorkQueue: c.WorkQueue,
Gvk: configMapGVK,
Lookup: c.lookupBundleByObjectByIndex(deploymentByIndex, byConfigMapNamespaceNameIndexName, byNamespaceNameIndexKey),
})
// Secret -> Deployment -> Bundle event propagation
secretGVK := core_v1.SchemeGroupVersion.WithKind("Secret")
secretInf := resourceInfs[secretGVK]
secretInf.AddEventHandler(&handlers.LookupHandler{
Logger: c.Logger,
WorkQueue: c.WorkQueue,
Gvk: secretGVK,
Lookup: c.lookupBundleByObjectByIndex(deploymentByIndex, bySecretNamespaceNameIndexName, byNamespaceNameIndexKey),
})
serviceInstanceInf, ok := resourceInfs[sc_v1b1.SchemeGroupVersion.WithKind("ServiceInstance")]
if ok { // Service Catalog support is enabled
// Secret -> ServiceInstance -> Bundle event propagation
err := serviceInstanceInf.AddIndexers(cache.Indexers{
bySecretNamespaceNameIndexName: serviceInstanceBySecretNamespaceNameIndex,
})
if err != nil {
return errors.WithStack(err)
}
serviceInstanceByIndex := serviceInstanceInf.GetIndexer().ByIndex
secretInf.AddEventHandler(&handlers.LookupHandler{
Logger: c.Logger,
WorkQueue: c.WorkQueue,
Gvk: secretGVK,
Lookup: c.lookupBundleByObjectByIndex(serviceInstanceByIndex, bySecretNamespaceNameIndexName, byNamespaceNameIndexKey),
})
// Secret -> ServiceBinding -> Bundle event propagation
serviceBindingInf := resourceInfs[sc_v1b1.SchemeGroupVersion.WithKind("ServiceBinding")]
err = serviceBindingInf.AddIndexers(cache.Indexers{
bySecretNamespaceNameIndexName: serviceBindingBySecretNamespaceNameIndex,
})
if err != nil {
return errors.WithStack(err)
}
serviceBindingByIndex := serviceBindingInf.GetIndexer().ByIndex
secretInf.AddEventHandler(&handlers.LookupHandler{
Logger: c.Logger,
WorkQueue: c.WorkQueue,
Gvk: secretGVK,
Lookup: c.lookupBundleByObjectByIndex(serviceBindingByIndex, bySecretNamespaceNameIndexName, byNamespaceNameIndexKey),
})
}
// Standard handler
for gvk, resourceInf := range resourceInfs {
resourceInf.AddEventHandler(&handlers.ControlledResourceHandler{
Logger: c.Logger,
WorkQueue: c.WorkQueue,
ControllerIndex: &controllerIndexAdapter{bundleStore: c.BundleStore},
ControllerGvk: smith_v1.BundleGVK,
Gvk: gvk,
})
}
return nil
}
// Run begins watching and syncing.
// All informers must be synced before this method is invoked.
func (c *Controller) Run(ctx context.Context) {
defer c.wg.Wait()
defer c.crdContextCancel() // should be executed after stopping is set to true
defer func() {
c.wgLock.Lock()
defer c.wgLock.Unlock()
c.stopping = true
}()
c.Logger.Info("Starting Bundle controller")
defer c.Logger.Info("Shutting down Bundle controller")
sink := core_v1_client.EventSinkImpl{
Interface: c.MainClient.CoreV1().Events(meta_v1.NamespaceNone),
}
recordingWatch := c.Broadcaster.StartRecordingToSink(&sink)
defer recordingWatch.Stop()
c.ReadyForWork()
<-ctx.Done()
}
// lookupBundleByObjectByIndex returns a function that can be used to perform lookups of Bundles that contain
// objects returned from an index.
func (c *Controller) lookupBundleByObjectByIndex(byIndex byIndexFunc, indexName string, indexKey indexKeyFunc) func(runtime.Object) ([]runtime.Object, error) {
return func(obj runtime.Object) ([]runtime.Object /*bundles*/, error) {
// obj is an object that is referred by some other object that might be in a Bundle
objMeta := obj.(meta_v1.Object)
// find all object that reference this obj
objsFromIndex, err := byIndex(indexName, indexKey(objMeta.GetNamespace(), objMeta.GetName()))
if err != nil {
return nil, err
}
var bundles []runtime.Object
for _, objFromIndex := range objsFromIndex {
runtimeObjFromIndex := objFromIndex.(runtime.Object)
metaObjFromIndex := objFromIndex.(meta_v1.Object)
gvks, _, err := c.Scheme.ObjectKinds(runtimeObjFromIndex)
if err != nil {
// Log and continue to try to process other objects if there are any more in objsFromIndex
// This shouldn't happen normally
c.Logger.
With(zap.Error(err), logz.Namespace(metaObjFromIndex), logz.Object(metaObjFromIndex)).
Sugar().Errorf("Could not determine GVK of an object")
continue
}
gks := make(map[schema.GroupKind]struct{}, len(gvks)) // not clear if duplicates are allowed, so de-dupe
for _, gvk := range gvks {
gks[gvk.GroupKind()] = struct{}{}
}
// find all Bundles that contain this object
for gk := range gks {
bundlesForObject, err := c.BundleStore.GetBundlesByObject(gk, metaObjFromIndex.GetNamespace(), metaObjFromIndex.GetName())
if err != nil {
// Log and continue to try to process other GKs
c.Logger.
With(zap.Error(err), logz.Namespace(metaObjFromIndex), logz.Object(metaObjFromIndex)).
Sugar().Errorf("Failed to get Bundles by object")
continue
}
for _, bundle := range bundlesForObject {
bundles = append(bundles, bundle)
}
}
}
return bundles, nil
}
}
type controllerIndexAdapter struct {
bundleStore BundleStore
}
func (c *controllerIndexAdapter) ControllerByObject(gk schema.GroupKind, namespace, name string) ([]runtime.Object, error) {
bundles, err := c.bundleStore.GetBundlesByObject(gk, namespace, name)
if err != nil {
return nil, err
}
objs := make([]runtime.Object, 0, len(bundles))
for _, bundle := range bundles {
objs = append(objs, bundle)
}
return objs, nil
}
func serviceInstanceBySecretNamespaceNameIndex(obj interface{}) ([]string, error) {
instance := obj.(*sc_v1b1.ServiceInstance)
return indexKeysFromParametersFrom(instance.Namespace, instance.Spec.ParametersFrom), nil
}
func serviceBindingBySecretNamespaceNameIndex(obj interface{}) ([]string, error) {
binding := obj.(*sc_v1b1.ServiceBinding)
return indexKeysFromParametersFrom(binding.Namespace, binding.Spec.ParametersFrom), nil
}
func indexKeysFromParametersFrom(namespace string, parametersFrom []sc_v1b1.ParametersFromSource) []string {
var indexKeys []string
for _, from := range parametersFrom {
fromValue := from.SecretKeyRef
if fromValue == nil {
continue
}
indexKeys = append(indexKeys, byNamespaceNameIndexKey(namespace, fromValue.Name))
}
return indexKeys
}
func deploymentByConfigMapNamespaceNameIndex(obj interface{}) ([]string, error) {
d := obj.(*apps_v1.Deployment)
indexKeys := configMapNamespaceNameIndexKeysForContainers(d.Namespace, d.Spec.Template.Spec.Containers)
indexKeys = append(indexKeys, configMapNamespaceNameIndexKeysForContainers(d.Namespace, d.Spec.Template.Spec.InitContainers)...)
return indexKeys, nil
}
func configMapNamespaceNameIndexKeysForContainers(namespace string, containers []core_v1.Container) []string {
var indexKeys []string
for _, container := range containers {
for _, envFrom := range container.EnvFrom {
configMapRef := envFrom.ConfigMapRef
if configMapRef == nil {
continue
}
indexKeys = append(indexKeys, byNamespaceNameIndexKey(namespace, configMapRef.Name))
}
for _, env := range container.Env {
valueFrom := env.ValueFrom
if valueFrom == nil {
continue
}
configMapKeyRef := valueFrom.ConfigMapKeyRef
if configMapKeyRef == nil {
continue
}
indexKeys = append(indexKeys, byNamespaceNameIndexKey(namespace, configMapKeyRef.Name))
}
}
return indexKeys
}
func deploymentBySecretNamespaceNameIndex(obj interface{}) ([]string, error) {
d := obj.(*apps_v1.Deployment)
indexKeys := secretNamespaceNameIndexKeysForContainers(d.Namespace, d.Spec.Template.Spec.Containers)
indexKeys = append(indexKeys, secretNamespaceNameIndexKeysForContainers(d.Namespace, d.Spec.Template.Spec.InitContainers)...)
return indexKeys, nil
}
func secretNamespaceNameIndexKeysForContainers(namespace string, containers []core_v1.Container) []string {
var indexKeys []string
for _, container := range containers {
for _, envFrom := range container.EnvFrom {
secretRef := envFrom.SecretRef
if secretRef == nil {
continue
}
indexKeys = append(indexKeys, byNamespaceNameIndexKey(namespace, secretRef.Name))
}
for _, env := range container.Env {
valueFrom := env.ValueFrom
if valueFrom == nil {
continue
}
secretKeyRef := valueFrom.SecretKeyRef
if secretKeyRef == nil {
continue
}
indexKeys = append(indexKeys, byNamespaceNameIndexKey(namespace, secretKeyRef.Name))
}
}
return indexKeys
}
func byNamespaceNameIndexKey(namespace, name string) string {
return namespace + "/" + name
}