Add GetSystemUserSecret Heplers on PerconaXtraDB (#989)

Signed-off-by: Md. Alif Biswas <alif@appscode.com>

apis/kubedb/v1alpha2/perconaxtradb_helpers.go

@@ -117,6 +117,24 @@ func (p PerconaXtraDB) GetAuthSecretName() string {
 	return meta_util.NameWithSuffix(p.OffshootName(), "auth")
 }
 
+func (p PerconaXtraDB) GetReplicationSecretName() string {
+	if p.Spec.SystemUserSecrets != nil &&
+		p.Spec.SystemUserSecrets.ReplicationUserSecret != nil &&
+		p.Spec.SystemUserSecrets.ReplicationUserSecret.Name != "" {
+		return p.Spec.SystemUserSecrets.ReplicationUserSecret.Name
+	}
+	return meta_util.NameWithSuffix(p.OffshootName(), "replication")
+}
+
+func (p PerconaXtraDB) GetMonitorSecretName() string {
+	if p.Spec.SystemUserSecrets != nil &&
+		p.Spec.SystemUserSecrets.MonitorUserSecret != nil &&
+		p.Spec.SystemUserSecrets.MonitorUserSecret.Name != "" {
+		return p.Spec.SystemUserSecrets.MonitorUserSecret.Name
+	}
+	return meta_util.NameWithSuffix(p.OffshootName(), "monitor")
+}
+
 func (p PerconaXtraDB) ClusterName() string {
 	return p.OffshootName()
 }
@@ -292,6 +310,12 @@ func (p *PerconaXtraDBSpec) GetPersistentSecrets() []string {
 	if p.AuthSecret != nil {
 		secrets = append(secrets, p.AuthSecret.Name)
 	}
+	if p.SystemUserSecrets != nil && p.SystemUserSecrets.ReplicationUserSecret != nil {
+		secrets = append(secrets, p.SystemUserSecrets.ReplicationUserSecret.Name)
+	}
+	if p.SystemUserSecrets != nil && p.SystemUserSecrets.MonitorUserSecret != nil {
+		secrets = append(secrets, p.SystemUserSecrets.MonitorUserSecret.Name)
+	}
 	return secrets
 }
 
@@ -312,14 +336,6 @@ func (p *PerconaXtraDB) GetCertSecretName(alias PerconaXtraDBCertificateAlias) s
 	return p.CertificateName(alias)
 }
 
-func (p *PerconaXtraDB) ReplicationSecretName() string {
-	return meta_util.NameWithSuffix(p.Name, "replication")
-}
-
-func (p *PerconaXtraDB) MonitorSecretName() string {
-	return meta_util.NameWithSuffix(p.Name, "monitor")
-}
-
 func (p *PerconaXtraDB) ReplicasAreReady(lister appslister.StatefulSetLister) (bool, string, error) {
 	// Desire number of statefulSets
 	expectedItems := 1