adding helm chart for nginx-ingress

charts/nginx-ingress/.helmignore

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+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

charts/nginx-ingress/Chart.yaml

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+apiVersion: v2
+name: nginx-ingress
+description: A Helm chart for Nginx Ingress
+
+# A chart can be either an 'application' or a 'library' chart.
+#
+# Application charts are a collection of templates that can be packaged into versioned archives
+# to be deployed.
+#
+# Library charts provide useful utilities or functions for the chart developer. They're included as
+# a dependency of application charts to inject those utilities and functions into the rendering
+# pipeline. Library charts do not define any templates and therefore cannot be deployed.
+type: application
+
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+# Versions are expected to follow Semantic Versioning (https://semver.org/)
+version: 0.1.0
+
+# This is the version number of the application being deployed. This version number should be
+# incremented each time you make changes to the application. Versions are not expected to
+# follow Semantic Versioning. They should reflect the version the application is using.
+# It is recommended to use it with quotes.
+appVersion: "1.16.0"

charts/nginx-ingress/templates/_helpers.tpl

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

charts/nginx-ingress/templates/ingress.yaml

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+{{- if .Values.ingress.enabled -}}
+{{- $fullName := include "nginx-ingress.fullname" . -}}
+{{- $svcPort := .Values.service.port -}}
+{{- if and .Values.ingress.className (not (semverCompare ">=1.18-0" .Capabilities.KubeVersion.GitVersion)) }}
+  {{- if not (hasKey .Values.ingress.annotations "kubernetes.io/ingress.class") }}
+  {{- $_ := set .Values.ingress.annotations "kubernetes.io/ingress.class" .Values.ingress.className}}
+  {{- end }}
+{{- end }}
+{{- if semverCompare ">=1.19-0" .Capabilities.KubeVersion.GitVersion -}}
+apiVersion: networking.k8s.io/v1
+{{- else if semverCompare ">=1.14-0" .Capabilities.KubeVersion.GitVersion -}}
+apiVersion: networking.k8s.io/v1beta1
+{{- else -}}
+apiVersion: extensions/v1beta1
+{{- end }}
+kind: Ingress
+metadata:
+  name: {{ $fullName }}
+  namespace: {{ .Values.namespace }}
+  labels:
+    {{- include "nginx-ingress.labels" . | nindent 4 }}
+  {{- with .Values.ingress.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+spec:
+  {{- if and .Values.ingress.className (semverCompare ">=1.18-0" .Capabilities.KubeVersion.GitVersion) }}
+  ingressClassName: {{ .Values.ingress.className }}
+  {{- end }}
+  {{- if .Values.ingress.tls }}
+  tls:
+    {{- range .Values.ingress.tls }}
+    - hosts:
+        {{- range .hosts }}
+        - {{ . | quote }}
+        {{- end }}
+      secretName: {{ .secretName }}
+    {{- end }}
+  {{- end }}
+  rules:
+    {{- range .Values.ingress.hosts }}
+    - host: {{ .host | quote }}
+      http:
+        paths:
+          {{- range .paths }}
+          - path: {{ .path }}
+            {{- if and .pathType (semverCompare ">=1.18-0" $.Capabilities.KubeVersion.GitVersion) }}
+            pathType: {{ .pathType }}
+            {{- end }}
+            backend:
+              {{- if semverCompare ">=1.19-0" $.Capabilities.KubeVersion.GitVersion }}
+              service:
+                name: {{ .backendService }}
+                port:
+                  number: {{ .backendPort }}
+              {{- else }}
+              serviceName: {{ .backendService }}
+              servicePort: {{ .backendPort }}
+              {{- end }}
+          {{- end }}
+    {{- end }}
+{{- end }}

charts/nginx-ingress/values.yaml

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+namespace: default
+ingress:
+  enabled: true
+  className: ""
+  annotations: {}
+    # kubernetes.io/ingress.class: nginx
+    # kubernetes.io/tls-acme: "true"
+    # nginx.ingress.kubernetes.io/rewrite-target: /
+    # nginx.ingress.kubernetes.io/ssl-redirect: "true"
+  hosts:
+    - host: grafana.example.com
+      paths:
+        - path: /
+          pathType: ImplementationSpecific
+    - host: otel.example.com
+      paths:
+        - path: /
+          pathType: ImplementationSpecific
+    - host: logging.example.com
+      paths:
+        - path: /
+          pathType: ImplementationSpecific
+    - host: vma.example.com
+      paths:
+        - path: /
+          pathType: ImplementationSpecific
+    - host: vmalert.example.com
+      paths:
+        - path: /
+          pathType: ImplementationSpecific
+    - host: vmalertmanager.example.com
+      paths:
+        - path: /
+          pathType: ImplementationSpecific
+  tls:
+    - secretName: tls-secret
+      hosts:
+        - grafana.example.com
+        - otel.example.com
+        - logging.example.com
+        - vma.example.com
+        - vmalert.example.com
+        - vmalertmanager.example.com
+service:
+  port: 80