Add Persistence storage configuration handling (#57)

* Add Persitence storage configuration and update Eiffel bundle to handle the new configuration configuration

* add storage class parameter

* Removed Size config parameter

bundles/Eiffel/K8S/k8s_bundle_functions.bash

@@ -37,6 +37,8 @@ function execute_k8s_command_on_services {
           image.tag="$EIFFEL_MONGODB_VERSION"
           fullnameOverride="$K8S_SERVICE_EIFFEL_MONGODB"
           service.port="$EIFFEL_MONGODB_EXTERNAL_PORT"
+          persistence.enabled="$K8S_PVC_ENABLE"
+          persistence.storageClass="$K8S_PVC_STORAGE_CLASS"
         )
         local valuefile="charts/charts_values/mongodb-values.yaml"
         local chart="charts/mongodb-9.3.1.tgz"
@@ -66,6 +68,8 @@ function execute_k8s_command_on_services {
           fullnameOverride="$K8S_SERVICE_EIFFEL_RABBITMQ"
           service.nodePort="$EIFFEL_RABBITMQ_AMQP_EXTERNAL_PORT"
           service.managerPort="$EIFFEL_RABBITMQ_WEB_EXTERNAL_PORT"
+          persistence.enabled="$K8S_PVC_ENABLE"
+          persistence.storageClass="$K8S_PVC_STORAGE_CLASS"
         )
         local valuefile="charts/charts_values/rabbitmq-values.yaml"
         local chart="charts/rabbitmq-7.7.1.tgz"

config-default.bash

@@ -109,3 +109,20 @@ HELM_VERSION=V3
 # ------------------------------------------------------------------------------
 K8S_INGRESS_TLS_ENABLE=false
 K8S_INGRESS_CERT_SECRET_NAME=""
+
+
+# ----------- Services Persistence Storage (PVC) configurations -------------------------------------
+# Some components support persitent storage in Kubernetes, e.g. MongoDb and RabbitMq in Eiffel bundle.
+# When persistence storage (PVC - PersistenceVolumeClaim) is enabled, data is not lossed in case of restart of pod/container.
+# There is two configurations:
+# K8S_PVC_ENABLE : if set to true, then persistence storage will be used for components that support that.
+# K8S_PVC_STORAGE_CLASS : If defined, storageClassName: <storageClass>
+#                         If set to "-", storageClassName: "", which disables dynamic provisioning
+#                         If undefined (the default) or set to null, no storageClassName spec is
+#                         set, choosing the default provisioner.  (gp2 on AWS, standard on
+#                         GKE, AWS & OpenStack)
+#                         storageClass: "-"
+#                       
+# ------------------------------------------------------------------------------
+K8S_PVC_ENABLE=false
+K8S_PVC_STORAGE_CLASS="null"