/
reconciler.go
126 lines (107 loc) · 4.1 KB
/
reconciler.go
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package proxy
import (
"context"
"net/url"
dynatracev1beta1 "github.com/Dynatrace/dynatrace-operator/pkg/api/v1beta1/dynakube"
"github.com/Dynatrace/dynatrace-operator/pkg/controllers"
"github.com/Dynatrace/dynatrace-operator/pkg/controllers/dynakube/activegate/capability"
"github.com/Dynatrace/dynatrace-operator/pkg/util/kubeobjects/labels"
k8ssecret "github.com/Dynatrace/dynatrace-operator/pkg/util/kubeobjects/secret"
"github.com/pkg/errors"
corev1 "k8s.io/api/core/v1"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
)
const (
proxyHostField = "host"
proxyPortField = "port"
proxyUsernameField = "username"
proxyPasswordField = "password"
)
var _ controllers.Reconciler = &Reconciler{}
// Reconciler manages the ActiveGate proxy secret generation for the dynatrace namespace.
type Reconciler struct {
client client.Client
apiReader client.Reader
scheme *runtime.Scheme
dynakube *dynatracev1beta1.DynaKube
}
func (r *Reconciler) Reconcile(ctx context.Context) error {
if r.dynakube.NeedsActiveGateProxy() {
return r.generateForDynakube(ctx, r.dynakube)
}
return r.ensureDeleted(ctx, r.dynakube)
}
func NewReconciler(client client.Client, apiReader client.Reader, scheme *runtime.Scheme, dynakube *dynatracev1beta1.DynaKube) *Reconciler {
return &Reconciler{
client: client,
apiReader: apiReader,
scheme: scheme,
dynakube: dynakube,
}
}
func (r *Reconciler) generateForDynakube(ctx context.Context, dynakube *dynatracev1beta1.DynaKube) error {
data, err := r.createProxyMap(ctx, dynakube)
if err != nil {
return errors.WithStack(err)
}
coreLabels := labels.NewCoreLabels(dynakube.Name, labels.ActiveGateComponentLabel)
secret, err := k8ssecret.Create(r.scheme, r.dynakube,
k8ssecret.NewNameModifier(capability.BuildProxySecretName(dynakube.Name)),
k8ssecret.NewNamespaceModifier(r.dynakube.Namespace),
k8ssecret.NewLabelsModifier(coreLabels.BuildMatchLabels()),
k8ssecret.NewTypeModifier(corev1.SecretTypeOpaque),
k8ssecret.NewDataModifier(data))
if err != nil {
return errors.WithStack(err)
}
secretQuery := k8ssecret.NewQuery(ctx, r.client, r.apiReader, log)
err = secretQuery.CreateOrUpdate(*secret)
return errors.WithStack(err)
}
func (r *Reconciler) ensureDeleted(ctx context.Context, dynakube *dynatracev1beta1.DynaKube) error {
secretName := capability.BuildProxySecretName(dynakube.Name)
secret := corev1.Secret{ObjectMeta: metav1.ObjectMeta{Name: secretName, Namespace: dynakube.Namespace}}
if err := r.client.Delete(ctx, &secret); err != nil && !k8serrors.IsNotFound(err) {
return err
} else if err == nil {
// If the secret is deleted the error is nil, otherwise err is notFound, then we should log nothing
log.Info("removed secret", "namespace", dynakube.Namespace, "secret", secretName)
}
return nil
}
func (r *Reconciler) createProxyMap(ctx context.Context, dynakube *dynatracev1beta1.DynaKube) (map[string][]byte, error) {
if !dynakube.HasProxy() {
// the parsed-proxy secret is expected to exist and the entrypoint.sh script handles empty values properly
return map[string][]byte{
proxyHostField: []byte(""),
proxyPortField: []byte(""),
proxyUsernameField: []byte(""),
proxyPasswordField: []byte(""),
}, nil
}
proxyUrl, err := dynakube.Proxy(ctx, r.apiReader)
if err != nil {
return nil, err
}
host, port, username, password, err := parseProxyUrl(proxyUrl)
if err != nil {
return nil, err
}
return map[string][]byte{
proxyHostField: []byte(host),
proxyPortField: []byte(port),
proxyUsernameField: []byte(username),
proxyPasswordField: []byte(password),
}, nil
}
func parseProxyUrl(proxy string) (host, port, username, password string, err error) { //nolint:revive // maximum number of return results per function exceeded; max 3 but got 5
proxyUrl, err := url.Parse(proxy)
if err != nil {
return "", "", "", "", errors.New("could not parse proxy URL")
}
passwd, _ := proxyUrl.User.Password()
return proxyUrl.Hostname(), proxyUrl.Port(), proxyUrl.User.Username(), passwd, nil
}