fixed pod template to support clickhouse upgrades (#37)

* fixed pod template to support clickhouse upgrades

* wip

* added podHash instead of version for future scalability

* wip

* wip

---------

Co-authored-by: Manish Rawat <manish@Manishs-MacBook-Air.local>

Author: manishrawat1992

charts/clickhouse/templates/_helpers.tpl

@@ -32,6 +32,10 @@ If release name contains chart name it will be used as a full name.
 {{- end }}
 {{- end }}
 
+{{- define "clickhouse.version" -}}
+{{ .Values.clickhouse.image.repository }}:{{ .Values.clickhouse.image.tag | default .Chart.AppVersion }}
+{{- end }}
+
 {{/*
 Create chart name and version as used by the chart label.
 */}}
@@ -132,7 +136,9 @@ Pod Template Base
 Pod Template Name
 */}}
 {{- define "clickhouse.podTemplateName" -}}
-{{- printf "%s-pod" (include "clickhouse.fullname" .) | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- $podDescString := printf "%s-%s" (include "clickhouse.fullname" .) (include "clickhouse.version" .) }}
+{{- $podHash := $podDescString | sha256sum | trunc 8 }} 
+{{- printf "%s-pod-%s" (include "clickhouse.fullname" .) $podHash | replace "+" "_" | trunc 63 | trimSuffix "-" }}
 {{- end }}
 
 {{/*