[common] Add common chart from KaH

charts/common/templates/addons/vpn/wireguard/_addon.tpl

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+{{/*
+Template to render Wireguard addon. It will add the container to the list of additionalContainers.
+*/}}
+*/}}
+{{- define "common.addon.wireguard" -}}
+  {{/* Append the Wireguard container to the additionalContainers */}}
+  {{- $container := fromYaml (include "common.addon.wireguard.container" .) -}}
+  {{- if $container -}}
+    {{- $_ := set .Values.additionalContainers "addon-wireguard" $container -}}
+  {{- end -}}
+{{- end -}}

charts/common/templates/addons/vpn/wireguard/_container.tpl

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+{{/*
+The Wireguard sidecar container to be inserted.
+*/}}
+{{- define "common.addon.wireguard.container" -}}
+name: wireguard
+image: "{{ .Values.addons.vpn.wireguard.image.repository }}:{{ .Values.addons.vpn.wireguard.image.tag }}"
+imagePullPolicy: {{ .Values.addons.vpn.wireguard.pullPolicy }}
+{{- with .Values.addons.vpn.securityContext }}
+securityContext:
+  {{- toYaml . | nindent 2 }}
+{{- end }}
+{{- with .Values.addons.vpn.env }}
+env:
+  {{- . | toYaml | nindent 2 }}
+{{- end }}
+{{- with .Values.addons.vpn.envFrom }}
+envFrom:
+  {{- . | toYaml | nindent 2 }}
+{{- end }}
+{{- with .Values.addons.vpn.args }}
+args:
+  {{- . | toYaml | nindent 2 }}
+{{- end }}
+{{- if or .Values.addons.vpn.configFile .Values.addons.vpn.configFileSecret .Values.addons.vpn.scripts.up .Values.addons.vpn.scripts.down .Values.addons.vpn.additionalVolumeMounts .Values.persistence.shared.enabled }}
+volumeMounts:
+{{- if or .Values.addons.vpn.configFile .Values.addons.vpn.configFileSecret }}
+  - name: vpnconfig
+    mountPath: /etc/wireguard/wg0.conf
+    subPath: vpnConfigfile
+{{- end }}
+{{- if .Values.addons.vpn.scripts.up }}
+  - name: vpnscript
+    mountPath: /config/up.sh
+    subPath: up.sh
+{{- end }}
+{{- if .Values.addons.vpn.scripts.down }}
+  - name: vpnscript
+    mountPath: /config/down.sh
+    subPath: down.sh
+{{- end }}
+{{- if .Values.persistence.shared.enabled }}
+  - mountPath: {{ .Values.persistence.shared.mountPath }}
+    name: shared
+{{- end }}
+{{- with .Values.addons.vpn.additionalVolumeMounts }}
+  {{- toYaml . | nindent 2 }}
+{{- end }}
+{{- end }}
+{{- with .Values.addons.vpn.livenessProbe }}
+livenessProbe:
+  {{- toYaml . | nindent 2 }}
+{{- end -}}
+{{- with .Values.addons.vpn.resources }}
+resources:
+  {{- toYaml . | nindent 2 }}
+{{- end }}
+{{- end -}}