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spinnakervalidating_controller.go
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/
spinnakervalidating_controller.go
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package spinnakervalidating
import (
"context"
"crypto/md5"
"encoding/hex"
"encoding/json"
"fmt"
"net/http"
"time"
"github.com/armory/spinnaker-operator/pkg/apis/spinnaker/interfaces"
"github.com/armory/spinnaker-operator/pkg/controller/webhook"
"github.com/armory/spinnaker-operator/pkg/halyard"
"github.com/armory/spinnaker-operator/pkg/secrets"
"github.com/armory/spinnaker-operator/pkg/validate"
"gomodules.xyz/jsonpatch/v2"
v1 "k8s.io/api/admission/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/rest"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/client/apiutil"
logf "sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/runtime/inject"
"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
)
const (
ValidationConfigHashKey = "validation"
DefaultValidationFreqSeconds = 10
)
// spinnakerValidatingController performs preflight checks
type spinnakerValidatingController struct {
client client.Client
decoder *admission.Decoder
restConfig *rest.Config
}
// TypesFactory instantiates the type we're going to validate
var TypesFactory interfaces.TypesFactory
// Implement all intended interfaces.
var _ admission.Handler = &spinnakerValidatingController{}
var _ inject.Config = &spinnakerValidatingController{}
var _ inject.Client = &spinnakerValidatingController{}
var _ admission.DecoderInjector = &spinnakerValidatingController{}
var log = logf.Log.WithName("spinvalidate")
// Add adds the validating admission controller
func Add(m manager.Manager) error {
spinSvc := TypesFactory.NewService()
gvk, err := apiutil.GVKForObject(spinSvc, m.GetScheme())
if err != nil {
return err
}
webhook.Register(gvk, "spinnakerservices", &spinnakerValidatingController{})
return nil
}
// Handle is the entry point for spinnaker preflight validations
func (v *spinnakerValidatingController) Handle(ctx context.Context, req admission.Request) admission.Response {
log.Info(fmt.Sprintf("Handling admission request for: %s", req.AdmissionRequest.Kind.Kind))
svc, err := v.getSpinnakerService(req)
if err != nil {
log.Error(err, "Unable to retrieve Spinnaker service from request")
return admission.Errored(http.StatusExpectationFailed, err)
}
if svc == nil {
log.Info("No SpinnakerService found in request")
return admission.ValidationResponse(true, "")
}
hc := svc.GetStatus().GetHash(ValidationConfigHashKey)
if hc != nil {
if !v.NeedsValidation(hc.LastUpdatedAt) {
return admission.Allowed("")
}
}
opts := validate.Options{
Ctx: secrets.NewContext(ctx, v.restConfig, req.Namespace),
Client: v.client,
Req: req,
Log: log,
Halyard: halyard.NewService(),
TypesFactory: TypesFactory,
}
defer secrets.Cleanup(opts.Ctx)
log.Info("Validating SpinnakerService", "metadata.name", svc.GetName())
validationResult := validate.ValidateAll(svc, opts)
if validationResult.HasErrors() {
errorMsg := validationResult.GetErrorMessage()
err := fmt.Errorf(errorMsg)
log.Error(err, errorMsg, "metadata.name", svc)
return admission.Denied(errorMsg)
}
// Update the status with any admission status change, only if there's already an existing SpinnakerService
if req.AdmissionRequest.Operation == v1.Update {
if len(validationResult.StatusPatches) > 0 {
validationResult.StatusPatches = append(validationResult.StatusPatches, v.addLastValidation(svc))
log.Info(fmt.Sprintf("patching SpinnakerService status with %v", validationResult.StatusPatches), "metadata.name", svc.GetName())
if err := v.client.Status().Patch(ctx, svc, &precomputedPatch{validationResult}); err != nil {
return admission.Errored(http.StatusInternalServerError, err)
}
}
}
log.Info("SpinnakerService is valid", "metadata.name", svc.GetName())
return admission.ValidationResponse(true, "")
}
func (v *spinnakerValidatingController) NeedsValidation(lastValid metav1.Time) bool {
if lastValid.IsZero() {
return true
}
n := lastValid.Time.Add(time.Duration(DefaultValidationFreqSeconds) * time.Second)
return time.Now().After(n)
}
func (v *spinnakerValidatingController) getHash(config interface{}) (string, error) {
data, err := json.Marshal(config)
if err != nil {
return "", err
}
m := md5.Sum(data)
return hex.EncodeToString(m[:]), nil
}
func (v *spinnakerValidatingController) addLastValidation(svc interfaces.SpinnakerService) jsonpatch.JsonPatchOperation {
hash, _ := v.getHash(svc.GetStatus())
return jsonpatch.NewOperation("replace", fmt.Sprintf("/status/lastDeployed/%s", ValidationConfigHashKey), interfaces.HashStatus{
Hash: hash,
LastUpdatedAt: metav1.NewTime(time.Now()),
})
}
// InjectClient injects the client.
func (v *spinnakerValidatingController) InjectClient(c client.Client) error {
v.client = c
return nil
}
// InjectDecoder injects the decoder.
func (v *spinnakerValidatingController) InjectDecoder(d *admission.Decoder) error {
v.decoder = d
return nil
}
// InjectConfig injects the rest config for creating raw kubernetes clients.
func (v *spinnakerValidatingController) InjectConfig(c *rest.Config) error {
v.restConfig = c
return nil
}
type precomputedPatch struct {
validationResult validate.ValidationResult
}
func (p *precomputedPatch) Type() types.PatchType {
return types.JSONPatchType
}
func (p *precomputedPatch) Data(obj client.Object) ([]byte, error) {
return json.Marshal(p.validationResult.StatusPatches)
}