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diff --git a/helm/templates/_templates.tpl b/helm/templates/_templates.tpl
new file mode 100644
index 0000000..3e92baf
--- /dev/null
+++ b/helm/templates/_templates.tpl
@@ -0,0 +1,107 @@
+{{/*
+# Copyright (c) 2020 Bell Canada
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+*/}}
+
+{{- define "common.namespace" -}}
+  {{- default .Release.Namespace .Values.nsPrefix -}}
+{{- end -}}
+
+
+{{/*
+  Expand the name of a chart.
+  The function takes from one to two arguments (inside a dictionary):
+     - .dot : environment (.)
+     - .suffix : add a suffix to the name
+*/}}
+{{- define "common.name" -}}
+  {{- $dot := default . .dot -}}
+  {{- $suffix := .suffix -}}
+  {{- default $dot.Chart.Name $dot.Values.nameOverride | trunc 63 | trimSuffix "-" -}}{{ if $suffix }}{{ print "-" $suffix }}{{ end }}
+{{- end -}}
+
+{{/*
+  The same as common.full name but based on passed dictionary instead of trying to figure
+  out chart name on its own.
+*/}}
+{{- define "common.fullnameExplicit" -}}
+  {{- $dot := .dot }}
+  {{- $name := .chartName }}
+  {{- $suffix := default "" .suffix -}}
+  {{- printf "%s-%s-%s" (include "common.release" $dot) $name $suffix | trunc 63 | trimSuffix "-" | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+  Create a default fully qualified application name.
+  Truncated at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+  Usage:
+      include "common.fullname" .
+      include "common.fullname" (dict "suffix" "mySuffix" "dot" .)
+  The function takes from one to two arguments:
+     - .dot : environment (.)
+     - .suffix : add a suffix to the fullname
+*/}}
+{{- define "common.fullname" -}}
+{{- $dot := default . .dot -}}
+{{- $suffix := default "" .suffix -}}
+  {{- $name := default $dot.Chart.Name $dot.Values.nameOverride -}}
+  {{- include "common.fullnameExplicit" (dict "dot" $dot "chartName" $name "suffix" $suffix) }}
+{{- end -}}
+
+{{/*
+  Retrieve the "original" release from the component release:
+  if ONAP is deploy with "helm deploy --name toto", then cassandra components
+  will have "toto-cassandra" as release name.
+  this function would answer back "toto".
+*/}}
+{{- define "common.release" -}}
+  {{- first (regexSplit "-" .Release.Name -1)  }}
+{{- end -}}
+
+{{- define "common.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+  Resolve the name of the common image repository.
+  The value for .Values.repository is used by default,
+  unless either override mechanism is used.
+
+  - .Values.global.repository  : override default image repository for all images
+  - .Values.repositoryOverride : override global and default image repository on a per image basis
+*/}}
+{{- define "common.repository" -}} 
+  {{if .Values.repositoryOverride }}
+    {{- printf "%s" .Values.repositoryOverride -}} 
+  {{else}}
+    {{- default .Values.repository .Values.global.repository -}} 
+  {{end}}
+{{- end -}} 
+
+{{/*
+  Resolve the name of a chart's service.
+
+  The default will be the chart name (or .Values.nameOverride if set).
+  And the use of .Values.service.name overrides all.
+
+  - .Values.service.name: override default service (ie. chart) name
+*/}}
+{{/*
+  Expand the service name for a chart.
+*/}}
+{{- define "common.servicename" -}} 
+  {{- $name := default .Chart.Name .Values.nameOverride -}} 
+  {{- default $name .Values.service.name | trunc 63 | trimSuffix "-" -}} 
+{{- end -}} 
+