feat: Add support for volumes and volumeMounts

Add support for volumes and volumeMounts.
Cover the changes with the tests.
Update helm charts with the Volumes and VolumeMounts options.
Add missing helm chart support for persistentVolumeClaimRetentionPolicy.

Signed-off-by: Damian Seredyn <[email protected]>

Author: Damian Seredyn

api/common/v1beta2/common_types.go

@@ -15,6 +15,8 @@ type KubernetesConfig struct {
 	ImagePullSecrets                     *[]corev1.LocalObjectReference                          `json:"imagePullSecrets,omitempty"`
 	UpdateStrategy                       appsv1.StatefulSetUpdateStrategy                        `json:"updateStrategy,omitempty"`
 	PersistentVolumeClaimRetentionPolicy *appsv1.StatefulSetPersistentVolumeClaimRetentionPolicy `json:"persistentVolumeClaimRetentionPolicy,omitempty"`
+	AdditionalVolumes                    []corev1.Volume                                         `json:"additionalVolumes,omitempty"`
+	AdditionalVolumeMounts               []corev1.VolumeMount                                    `json:"additionalVolumeMounts,omitempty"`
 	Service                              *ServiceConfig                                          `json:"service,omitempty"`
 	IgnoreAnnotations                    []string                                                `json:"ignoreAnnotations,omitempty"`
 	MinReadySeconds                      *int32                                                  `json:"minReadySeconds,omitempty"`