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wip: trying to deploy this application using helm (#16)
* wip: trying to deploy this application using helm * updated the main.go * working version of helm-chart, docker image and manual way
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‎Makefile

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APP_NAME = k8s-custom-controller
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DOCKER_USER = manzilrahul
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VERSION ?= 1.0.1
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VERSION ?= 1.0.5
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IMAGE_NAME = $(DOCKER_USER)/$(APP_NAME)
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# 🖼️ Logo banner

‎chart/.helmignore

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

‎chart/Chart.yaml

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

‎chart/templates/NOTES.txt

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1. Get the application URL by running these commands:
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{{- if .Values.ingress.enabled }}
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{{- range $host := .Values.ingress.hosts }}
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{{- range .paths }}
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http{{ if $.Values.ingress.tls }}s{{ end }}://{{ $host.host }}{{ .path }}
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{{- end }}
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{{- end }}
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{{- else if contains "NodePort" .Values.service.type }}
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export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "chart.fullname" . }})
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export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
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echo http://$NODE_IP:$NODE_PORT
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{{- else if contains "LoadBalancer" .Values.service.type }}
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NOTE: It may take a few minutes for the LoadBalancer IP to be available.
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You can watch its status by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "chart.fullname" . }}'
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export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "chart.fullname" . }} --template "{{"{{ range (index .status.loadBalancer.ingress 0) }}{{.}}{{ end }}"}}")
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echo http://$SERVICE_IP:{{ .Values.service.port }}
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{{- else if contains "ClusterIP" .Values.service.type }}
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export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app.kubernetes.io/name={{ include "chart.name" . }},app.kubernetes.io/instance={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
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export CONTAINER_PORT=$(kubectl get pod --namespace {{ .Release.Namespace }} $POD_NAME -o jsonpath="{.spec.containers[0].ports[0].containerPort}")
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echo "Visit http://127.0.0.1:8080 to use your application"
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kubectl --namespace {{ .Release.Namespace }} port-forward $POD_NAME 8080:$CONTAINER_PORT
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{{- end }}

‎chart/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 "chart.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 "chart.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 "chart.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 "chart.labels" -}}
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helm.sh/chart: {{ include "chart.chart" . }}
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{{ include "chart.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 "chart.selectorLabels" -}}
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app.kubernetes.io/name: {{ include "chart.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 "chart.serviceAccountName" -}}
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{{- if .Values.serviceAccount.create }}
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{{- default (include "chart.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 }}

‎chart/templates/clusterrole.yaml

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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRole
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metadata:
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name: {{ include "chart.fullname" . }}
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rules:
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- apiGroups: ["apps"]
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resources: ["deployments"]
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verbs: ["get", "list", "watch"]
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- apiGroups: [""]
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resources: ["services"]
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verbs: ["get", "list", "watch", "create", "update"]
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- apiGroups: ["networking.k8s.io"]
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resources: ["ingresses"]
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verbs: ["get", "list", "watch", "create", "update"]

‎chart/templates/clusterrolebinding.yaml

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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRoleBinding
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metadata:
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name: {{ include "chart.fullname" . }}
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subjects:
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- kind: ServiceAccount
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name: {{ include "chart.serviceAccountName" . }}
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namespace: {{ .Release.Namespace }}
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roleRef:
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kind: ClusterRole
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name: {{ include "chart.fullname" . }}
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apiGroup: rbac.authorization.k8s.io

‎chart/templates/deployment.yaml

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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: {{ include "chart.fullname" . }}
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labels:
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{{- include "chart.labels" . | nindent 4 }}
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spec:
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{{- if not .Values.autoscaling.enabled }}
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replicas: {{ .Values.replicaCount }}
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{{- end }}
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selector:
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matchLabels:
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{{- include "chart.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 "chart.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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serviceAccountName: {{ include "chart.serviceAccountName" . }}
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{{- with .Values.podSecurityContext }}
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securityContext:
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{{- toYaml . | nindent 8 }}
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{{- end }}
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containers:
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- name: {{ .Chart.Name }}
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{{- with .Values.securityContext }}
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securityContext:
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{{- toYaml . | nindent 12 }}
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{{- end }}
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image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
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env:
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- name: CONTEXT
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value: {{ .Values.context | quote }}
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imagePullPolicy: {{ .Values.image.pullPolicy }}
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ports:
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- name: http
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containerPort: {{ .Values.service.port }}
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protocol: TCP
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{{- with .Values.resources }}
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resources:
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{{- toYaml . | nindent 12 }}
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{{- end }}
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{{- with .Values.volumeMounts }}
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volumeMounts:
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{{- toYaml . | nindent 12 }}
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{{- end }}
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{{- with .Values.volumes }}
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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 }}

‎chart/templates/hpa.yaml

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{{- if .Values.autoscaling.enabled }}
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apiVersion: autoscaling/v2
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kind: HorizontalPodAutoscaler
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metadata:
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name: {{ include "chart.fullname" . }}
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labels:
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{{- include "chart.labels" . | nindent 4 }}
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spec:
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scaleTargetRef:
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apiVersion: apps/v1
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kind: Deployment
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name: {{ include "chart.fullname" . }}
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minReplicas: {{ .Values.autoscaling.minReplicas }}
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maxReplicas: {{ .Values.autoscaling.maxReplicas }}
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metrics:
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{{- if .Values.autoscaling.targetCPUUtilizationPercentage }}
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- type: Resource
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resource:
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name: cpu
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target:
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type: Utilization
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averageUtilization: {{ .Values.autoscaling.targetCPUUtilizationPercentage }}
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{{- end }}
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{{- if .Values.autoscaling.targetMemoryUtilizationPercentage }}
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- type: Resource
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resource:
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name: memory
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target:
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type: Utilization
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averageUtilization: {{ .Values.autoscaling.targetMemoryUtilizationPercentage }}
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{{- end }}
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{{- end }}

‎chart/templates/ingress.yaml

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{{- if .Values.ingress.enabled -}}
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apiVersion: networking.k8s.io/v1
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kind: Ingress
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metadata:
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name: {{ include "chart.fullname" . }}
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labels:
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{{- include "chart.labels" . | nindent 4 }}
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{{- with .Values.ingress.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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{{- with .Values.ingress.className }}
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ingressClassName: {{ . }}
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{{- end }}
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{{- if .Values.ingress.tls }}
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tls:
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{{- range .Values.ingress.tls }}
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- hosts:
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{{- range .hosts }}
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- {{ . | quote }}
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{{- end }}
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secretName: {{ .secretName }}
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{{- end }}
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{{- end }}
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rules:
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{{- range .Values.ingress.hosts }}
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- host: {{ .host | quote }}
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http:
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paths:
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{{- range .paths }}
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- path: {{ .path }}
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{{- with .pathType }}
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pathType: {{ . }}
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{{- end }}
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backend:
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service:
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name: {{ include "chart.fullname" $ }}
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port:
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number: {{ $.Values.service.port }}
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{{- end }}
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{{- end }}
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{{- end }}

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