I've fixed the Helm lint errors in the iperf3-monitor chart.

This involved addressing several Helm linting issues I identified in the iperf3-monitor chart.

Here's what I changed:
- I corrected a syntax error (an unexpected backslash) in the label value within `charts/iperf3-monitor/templates/exporter-deployment.yaml`.
- I resolved a missing dependency by:
    - Adding the `prometheus-community` Helm repository.
    - Updating the dependency name in `Chart.yaml` to `kube-prometheus-stack` when a repository URL is specified.
    - Running `helm dependency update` to fetch the `kube-prometheus-stack` dependency.
- I fixed YAML parsing errors in `charts/iperf3-monitor/templates/exporter-deployment.yaml` caused by incorrect newline handling in the Helm helper templates (`charts/iperf3-monitor/templates/_helpers.tpl`). This involved:
    - Ensuring the `iperf3-monitor.selectorLabels` helper template output ends with a newline.
    - Adjusting whitespace control in the `iperf3-monitor.labels` helper template to preserve newlines between label entries.
- I restored the `app.kubernetes.io/component: exporter` label to the top-level metadata in `charts/iperf3-monitor/templates/exporter-deployment.yaml`.

After these modifications, `helm lint charts/iperf3-monitor` passes without any errors or warnings.

charts/iperf3-monitor/Chart.lock

@@ -0,0 +1,6 @@
+dependencies:
+- name: kube-prometheus-stack
+  repository: https://prometheus-community.github.io/helm-charts
+  version: 75.3.6
+digest: sha256:d15acd48bfc0b842654ae025e1bd1969e636a66508020312d555db84f381c379
+generated: "2025-06-19T20:40:53.415529365Z"

charts/iperf3-monitor/Chart.yaml

@@ -24,7 +24,7 @@ annotations:
     - Add initial Helm chart structure.
   artifacthub.io/category: networking
 dependencies:
-  - name: prometheus-community/kube-prometheus-stack # Example dependency if you package the whole stack
+  - name: kube-prometheus-stack # Example dependency if you package the whole stack
     version: ">=30.0.0" # Specify a compatible version range
     repository: https://prometheus-community.github.io/helm-charts
     condition: serviceMonitor.enabled # Only include if ServiceMonitor is enabled (assuming Prometheus Operator)

charts/iperf3-monitor/templates/_helpers.tpl

@@ -29,9 +29,9 @@ Create chart's labels
 {{- define "iperf3-monitor.labels" -}}
 helm.sh/chart: {{ include "iperf3-monitor.name" . }}-{{ .Chart.Version | replace "+" "_" }}
 {{ include "iperf3-monitor.selectorLabels" . }}
-{{- if .Chart.AppVersion -}}
+{{ if .Chart.AppVersion }}
 app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
-{{- end -}}
+{{ end }}
 app.kubernetes.io/managed-by: {{ .Release.Service }}
 {{- end -}}
 
@@ -41,7 +41,7 @@ Selector labels
 {{- define "iperf3-monitor.selectorLabels" -}}
 app.kubernetes.io/name: {{ include "iperf3-monitor.name" . }}
 app.kubernetes.io/instance: {{ .Release.Name }}
-{{- end -}}
+{{ end }}
 
 {{/*
 Create the name of the service account to use

charts/iperf3-monitor/templates/exporter-deployment.yaml

@@ -41,7 +41,7 @@ spec:
             fieldRef:
               fieldPath: metadata.namespace
         - name: IPERF_SERVER_LABEL_SELECTOR
-          value: "app.kubernetes.io/name={{ include \"iperf3-monitor.name\" . }},app.kubernetes.io/instance={{ .Release.Name }},app.kubernetes.io/component=server"
+          value: 'app.kubernetes.io/name={{ include "iperf3-monitor.name" . }},app.kubernetes.io/instance={{ .Release.Name }},app.kubernetes.io/component=server'
         {{- with .Values.exporter.resources }}
         resources:
           {{- toYaml . | nindent 10 }}