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reconciler.go
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reconciler.go
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package processmoduleconfigsecret
import (
"context"
"encoding/json"
dynatracev1beta1 "github.com/Dynatrace/dynatrace-operator/pkg/api/v1beta1/dynakube"
dtclient "github.com/Dynatrace/dynatrace-operator/pkg/clients/dynatrace"
"github.com/Dynatrace/dynatrace-operator/pkg/controllers/dynakube/activegate/capability"
"github.com/Dynatrace/dynatrace-operator/pkg/controllers/dynakube/connectioninfo"
"github.com/Dynatrace/dynatrace-operator/pkg/util/conditions"
secrets "github.com/Dynatrace/dynatrace-operator/pkg/util/kubeobjects/secret"
"github.com/Dynatrace/dynatrace-operator/pkg/util/timeprovider"
"github.com/pkg/errors"
corev1 "k8s.io/api/core/v1"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/meta"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"sigs.k8s.io/controller-runtime/pkg/client"
)
const (
PullSecretSuffix = "-pmc-secret"
SecretKeyProcessModuleConfig = "ruxitagentproc.conf"
)
type Reconciler struct {
client client.Client
apiReader client.Reader
dtClient dtclient.Client
dynakube *dynatracev1beta1.DynaKube
scheme *runtime.Scheme
timeProvider *timeprovider.Provider
}
func NewReconciler(clt client.Client, //nolint:revive
apiReader client.Reader,
dtClient dtclient.Client,
dynakube *dynatracev1beta1.DynaKube,
scheme *runtime.Scheme,
timeProvider *timeprovider.Provider) *Reconciler {
return &Reconciler{
client: clt,
apiReader: apiReader,
dtClient: dtClient,
dynakube: dynakube,
scheme: scheme,
timeProvider: timeProvider,
}
}
func (r *Reconciler) Reconcile(ctx context.Context) error {
if r.dynakube.CloudNativeFullstackMode() || r.dynakube.ApplicationMonitoringMode() {
err := r.reconcileSecret(ctx)
if err != nil {
log.Info("could not reconcile pull secret")
return errors.WithStack(err)
}
} else {
_ = meta.RemoveStatusCondition(&r.dynakube.Status.Conditions, pmcConditionType)
// TODO: Add cleanup here
log.Info("skipping process module config secret reconciler")
}
return nil
}
func (r *Reconciler) reconcileSecret(ctx context.Context) error {
if r.isFirstRun() {
err := r.createSecret(ctx)
if err != nil {
return errors.WithMessage(err, "could not get or create secret")
}
}
if err := r.ensureSecret(ctx); err != nil {
return errors.WithMessage(err, "could not update secret")
}
return nil
}
func (r *Reconciler) createSecret(ctx context.Context) error {
log.Info("creating process module config secret")
newSecret, err := r.prepareSecret(ctx)
if err != nil {
return err
}
if err = r.client.Create(ctx, newSecret); err != nil {
conditions.SetKubeApiError(r.dynakube.Conditions(), pmcConditionType, err)
return err
}
conditions.SetSecretCreated(r.dynakube.Conditions(), pmcConditionType, newSecret.Name)
return nil
}
func (r *Reconciler) ensureSecret(ctx context.Context) error {
oldSecret, err := getSecret(ctx, r.apiReader, r.dynakube.Name, r.dynakube.Namespace)
if k8serrors.IsNotFound(err) {
log.Info("secret was removed unexpectedly, ensuring process module config secret")
return r.createSecret(ctx)
} else if err != nil {
conditions.SetKubeApiError(r.dynakube.Conditions(), pmcConditionType, err)
return err
}
if conditions.IsOutdated(r.timeProvider, r.dynakube, pmcConditionType) {
conditions.SetSecretOutdated(r.dynakube.Conditions(), pmcConditionType, oldSecret.Name+" is outdated, update in progress") // Necessary to update the LastTransitionTime, also it is a nice failsafe
return r.updateSecret(ctx, oldSecret)
}
return nil
}
func (r *Reconciler) updateSecret(ctx context.Context, oldSecret *corev1.Secret) error {
log.Info("updating process module config secret")
newSecret, err := r.prepareSecret(ctx)
if err != nil {
return err
}
oldSecret.Data = newSecret.Data
if err = r.client.Update(ctx, oldSecret); err != nil {
conditions.SetKubeApiError(r.dynakube.Conditions(), pmcConditionType, err)
return err
}
conditions.SetSecretUpdated(r.dynakube.Conditions(), pmcConditionType, newSecret.Name)
return nil
}
func (r *Reconciler) isFirstRun() bool {
condition := meta.FindStatusCondition(r.dynakube.Status.Conditions, pmcConditionType)
return condition == nil
}
func (r *Reconciler) prepareSecret(ctx context.Context) (*corev1.Secret, error) {
pmc, err := r.dtClient.GetProcessModuleConfig(ctx, 0)
if err != nil {
conditions.SetDynatraceApiError(r.dynakube.Conditions(), pmcConditionType, err)
return nil, err
}
tenantToken, err := secrets.GetDataFromSecretName(r.apiReader, types.NamespacedName{
Name: r.dynakube.OneagentTenantSecret(),
Namespace: r.dynakube.Namespace,
}, connectioninfo.TenantTokenKey, log)
if err != nil {
conditions.SetKubeApiError(r.dynakube.Conditions(), pmcConditionType, err)
return nil, err
}
pmc = pmc.
AddHostGroup(r.dynakube.HostGroup()).
AddConnectionInfo(r.dynakube.Status.OneAgent.ConnectionInfoStatus, tenantToken).
// set proxy explicitly empty, so old proxy settings get deleted where necessary
AddProxy("")
if r.dynakube.NeedsOneAgentProxy() {
proxy, err := r.dynakube.Proxy(ctx, r.apiReader)
if err != nil {
conditions.SetKubeApiError(r.dynakube.Conditions(), pmcConditionType, err)
return nil, err
}
pmc.AddProxy(proxy)
if r.dynakube.NeedsActiveGate() {
multiCap := capability.NewMultiCapability(r.dynakube)
pmc.AddNoProxy(capability.BuildDNSEntryPointWithoutEnvVars(r.dynakube.Name, r.dynakube.Namespace, multiCap))
}
}
marshaled, err := json.Marshal(pmc)
if err != nil {
log.Info("could not marshal process module config")
return nil, err
}
newSecret, err := secrets.Create(r.scheme, r.dynakube,
secrets.NewNameModifier(extendWithSuffix(r.dynakube.Name)),
secrets.NewNamespaceModifier(r.dynakube.Namespace),
secrets.NewTypeModifier(corev1.SecretTypeOpaque),
secrets.NewDataModifier(map[string][]byte{SecretKeyProcessModuleConfig: marshaled}))
if err != nil {
conditions.SetKubeApiError(r.dynakube.Conditions(), pmcConditionType, err)
return nil, err
}
return newSecret, err
}
func GetSecretData(ctx context.Context, apiReader client.Reader, dynakubeName string, dynakubeNamespace string) (*dtclient.ProcessModuleConfig, error) {
secret, err := getSecret(ctx, apiReader, dynakubeName, dynakubeNamespace)
if err != nil {
return nil, err
}
processModuleConfig, err := unmarshal(secret)
if err != nil {
return nil, err
}
return processModuleConfig, nil
}
func getSecret(ctx context.Context, apiReader client.Reader, dynakubeName string, dynakubeNamespace string) (*corev1.Secret, error) {
var config corev1.Secret
err := apiReader.Get(ctx, client.ObjectKey{Name: extendWithSuffix(dynakubeName), Namespace: dynakubeNamespace}, &config)
if err != nil {
return nil, err
}
return &config, nil
}
func unmarshal(secret *corev1.Secret) (*dtclient.ProcessModuleConfig, error) {
var config *dtclient.ProcessModuleConfig
err := json.Unmarshal(secret.Data[SecretKeyProcessModuleConfig], &config)
if err != nil {
return nil, err
}
return config, nil
}
func extendWithSuffix(name string) string {
return name + PullSecretSuffix
}