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Add MQTT Broker to Basyx Helm Chart (eclipse-basyx#690)
* added mqtt dependency chart * changed Chart.yaml for mqtt * changed chart name of mqtt * fix: removed unused code
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‎examples/cloud/Chart.yaml‎

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@@ -27,6 +27,10 @@ dependencies:
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version: "0.0.1"
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repository: file://dependency_charts/aas-web-ui
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condition: aas-web-ui.enabled
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- name: mqtt
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version: "0.0.1"
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repository: file://dependency_charts/mqtt
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condition: mqtt.enabled
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- name: mongodb
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version: "14.5.0"
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repository: https://charts.bitnami.com/bitnami

‎examples/cloud/dependency_charts/mqtt/Chart.yaml‎

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#################################################################################
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# Copyright (c) 2025 SAP SE
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#
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# See the NOTICE file(s) distributed with this work for additional
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# information regarding copyright ownership.
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#
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# This program and the accompanying materials are made available under the
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# terms of the Apache License, Version 2.0 which is available at
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# https://www.apache.org/licenses/LICENSE-2.0.
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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# SPDX-License-Identifier: Apache-2.0
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#################################################################################
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apiVersion: v2
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name: mqtt
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description: A Helm chart for running Eclipse Mosquitto
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type: application
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version: 0.0.1
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appVersion: 2.0.21

‎examples/cloud/dependency_charts/mqtt/templates/_helpers.tpl‎

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{{/*
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Expand the name of the chart.
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*/}}
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{{- define "mqtt.name" -}}
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{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
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{{- end }}
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{{/*
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Create a default fully qualified app name.
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We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
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If release name contains chart name it will be used as a full name.
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*/}}
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{{- define "mqtt.fullname" -}}
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{{- if .Values.fullnameOverride }}
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{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
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{{- else }}
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{{- $name := default .Chart.Name .Values.nameOverride }}
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{{- if contains $name .Release.Name }}
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{{- .Release.Name | trunc 63 | trimSuffix "-" }}
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{{- else }}
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{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
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{{- end }}
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{{- end }}
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{{- end }}
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{{/*
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Create chart name and version as used by the chart label.
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*/}}
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{{- define "mqtt.chart" -}}
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{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
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{{- end }}
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{{/*
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Common labels
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*/}}
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{{- define "mqtt.labels" -}}
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helm.sh/chart: {{ include "mqtt.chart" . }}
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{{ include "mqtt.selectorLabels" . }}
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{{- if .Chart.AppVersion }}
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app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
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{{- end }}
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app.kubernetes.io/managed-by: {{ .Release.Service }}
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{{- end }}
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{{/*
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Selector labels
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*/}}
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{{- define "mqtt.selectorLabels" -}}
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app.kubernetes.io/name: {{ include "mqtt.name" . }}
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app.kubernetes.io/instance: {{ .Release.Name }}
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{{- end }}
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{{/*
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Create the name of the service account to use
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*/}}
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{{- define "mqtt.serviceAccountName" -}}
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{{- if .Values.serviceAccount.create }}
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{{- default (include "mqtt.fullname" .) .Values.serviceAccount.name }}
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{{- else }}
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{{- default "default" .Values.serviceAccount.name }}
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{{- end }}
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{{- end }}

‎examples/cloud/dependency_charts/mqtt/templates/apirule.yaml‎

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#################################################################################
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# Copyright (c) 2025 SAP SE
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#
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# See the NOTICE file(s) distributed with this work for additional
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# information regarding copyright ownership.
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#
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# This program and the accompanying materials are made available under the
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# terms of the Apache License, Version 2.0 which is available at
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# https://www.apache.org/licenses/LICENSE-2.0.
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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# SPDX-License-Identifier: Apache-2.0
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#################################################################################
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{{- $fullName := include "mqtt.fullname" . }}
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{{- $labels := include "mqtt.labels" . }}
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{{- $ports := .Values.ports }}
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{{- range .Values.apirules}}
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{{- if .enabled }}
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{{- $annotations := .annotations | default dict }}
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---
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apiVersion: gateway.kyma-project.io/v2alpha1
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kind: APIRule
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metadata:
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name: {{ $fullName }}-{{ .type }}
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labels:
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{{- $labels | nindent 4 }}
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{{- with $annotations }}
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annotations:
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{{- toYaml . | nindent 4 }}
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{{- end }}
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spec:
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{{- if .gateway }}
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gateway: {{ .gateway }}
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{{- else }}
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{{ fail "Gateway not specified. Failing the pipeline." }}
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{{- end }}
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{{- if .hostname }}
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{{- if .corsPolicy }}
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corsPolicy:
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{{- with .corsPolicy }}
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{{- toYaml . | nindent 4 }}
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{{- end }}
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{{- end }}
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hosts:
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- {{ .hostname }}
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rules:
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{{- $type := .type }}
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{{- range $key, $port := $ports }}
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{{- if (eq $key $type)}}
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- path: /*
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methods: ["GET", "POST", "PUT", "PATCH", "DELETE", "TRACE", "HEAD"]
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noAuth: true
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service:
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name: {{ $fullName }}
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port: {{ .port }}
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{{- end }}
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{{- end }}
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{{- end }}
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{{- end }}
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{{- end }}

‎examples/cloud/dependency_charts/mqtt/templates/configmap.yaml‎

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#################################################################################
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# Copyright (c) 2025 SAP SE
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#
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# See the NOTICE file(s) distributed with this work for additional
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# information regarding copyright ownership.
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#
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# This program and the accompanying materials are made available under the
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# terms of the Apache License, Version 2.0 which is available at
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# https://www.apache.org/licenses/LICENSE-2.0.
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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# SPDX-License-Identifier: Apache-2.0
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#################################################################################
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apiVersion: v1
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kind: ConfigMap
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metadata:
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name: {{ include "mqtt.fullname" . }}
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labels: {{- include "mqtt.labels" . | nindent 4 }}
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data:
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mosquitto.conf: |-
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listener {{ .Values.ports.mqtt.port }}
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{{- if .Values.websockets.enabled }}
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listener {{ .Values.ports.websockets.port }}
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protocol websockets
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{{- end }}
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{{- if .Values.auth.enabled }}
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allow_anonymous false
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password_file /mosquitto/config/passwords.conf
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acl_file /mosquitto/config/acl.conf
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{{- else }}
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allow_anonymous true
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{{- end }}
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{{- if .Values.persistence.enabled }}
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persistence true
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persistence_location {{ .Values.persistence.mountPath }}
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autosave_interval 1800
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{{- end }}
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log_dest stdout
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log_type all
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{{- if .Values.auth.enabled }}
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acl.conf: |-
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{{- range $user := .Values.auth.users }}
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user {{ $user.username }}
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{{- range $acl := $user.acl }}
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topic {{ $acl.access }} {{ $acl.topic }}
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{{- end }}
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{{- end }}
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passwords.conf: |-
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{{- range $value := .Values.auth.users }}
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{{ $value.username }}:{{ $value.password }}
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{{- end }}
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{{- end }}

‎examples/cloud/dependency_charts/mqtt/templates/deployment.yaml‎

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#################################################################################
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# Copyright (c) 2025 SAP SE
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#
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# See the NOTICE file(s) distributed with this work for additional
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# information regarding copyright ownership.
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#
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# This program and the accompanying materials are made available under the
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# terms of the Apache License, Version 2.0 which is available at
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# https://www.apache.org/licenses/LICENSE-2.0.
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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# SPDX-License-Identifier: Apache-2.0
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#################################################################################
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: {{ include "mqtt.fullname" . }}
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labels:
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{{- include "mqtt.labels" . | nindent 4 }}
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spec:
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replicas: {{ .Values.replicaCount }}
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selector:
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matchLabels:
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{{- include "mqtt.selectorLabels" . | nindent 6 }}
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template:
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metadata:
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{{- with .Values.podAnnotations }}
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annotations:
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{{- toYaml . | nindent 8 }}
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{{- end }}
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labels:
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{{- include "mqtt.labels" . | nindent 8 }}
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{{- with .Values.podLabels }}
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{{- toYaml . | nindent 8 }}
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{{- end }}
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spec:
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{{- with .Values.imagePullSecrets }}
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imagePullSecrets:
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{{- toYaml . | nindent 8 }}
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{{- end }}
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securityContext:
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{{- toYaml .Values.podSecurityContext | nindent 8 }}
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containers:
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- name: {{ .Chart.Name }}
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securityContext:
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{{- toYaml .Values.securityContext | nindent 12 }}
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image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
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imagePullPolicy: {{ .Values.image.pullPolicy }}
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ports:
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- name: mqtt
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containerPort: {{ .Values.ports.mqtt.port }}
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protocol: {{ .Values.ports.mqtt.protocol }}
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{{- if .Values.websockets.enabled }}
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- name: websockets
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containerPort: {{ .Values.ports.websockets.port }}
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protocol: {{ .Values.ports.websockets.protocol }}
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{{- end }}
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livenessProbe:
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{{- toYaml .Values.livenessProbe | nindent 12 }}
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readinessProbe:
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{{- toYaml .Values.readinessProbe | nindent 12 }}
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resources:
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{{- toYaml .Values.resources | nindent 12 }}
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volumeMounts:
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- name: config
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mountPath: /mosquitto/config/mosquitto.conf
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subPath: mosquitto.conf
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- name: data
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mountPath: {{ .Values.persistence.mountPath }}
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subPath: {{ .Values.persistence.subPath }}
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{{- if .Values.auth.enabled }}
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- name: password
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mountPath: /mosquitto/config/passwords.conf
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subPath: passwords.conf
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- name: acl
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mountPath: /mosquitto/config/acl.conf
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subPath: acl.conf
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{{- end }}
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{{- with .Values.volumeMounts }}
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{{- toYaml . | nindent 12 }}
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{{- end }}
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volumes:
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- name: config
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configMap:
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name: {{ include "mqtt.fullname" . }}
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- name: data
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{{- if .Values.persistence.enabled }}
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persistentVolumeClaim:
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claimName: {{ if .Values.persistence.existingClaim }}{{ .Values.persistence.existingClaim }}{{- else }}{{ include "mqtt.fullname" . }}{{- end }}
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{{- else }}
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emptyDir: {}
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{{- end }}
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{{- if .Values.auth.enabled }}
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- name: password
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configMap:
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name: {{ include "mqtt.fullname" . }}
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- name: acl
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configMap:
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name: {{ include "mqtt.fullname" . }}
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{{- end }}
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{{- with .Values.volumes }}
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{{- toYaml . | nindent 8 }}
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{{- end }}
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{{- with .Values.nodeSelector }}
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nodeSelector:
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{{- toYaml . | nindent 8 }}
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{{- end }}
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{{- with .Values.affinity }}
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affinity:
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{{- toYaml . | nindent 8 }}
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{{- end }}
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{{- with .Values.tolerations }}
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tolerations:
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{{- toYaml . | nindent 8 }}
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{{- end }}

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