create a helm chart for web server deployment with IP address 1.1.1.1 and port 80 for service access

It seems you're looking to create a Helm chart for a web server deployment and specifically want to configure an IP address and port for service access.

While Helm charts are excellent for deploying applications to Kubernetes, there's a slight misunderstanding regarding directly assigning a specific IP address like 1.1.1.1 to a service within a typical Kubernetes cluster setup.

Here's why and how we can achieve something similar:

1. Kubernetes Service IPs: Kubernetes Services get their IP addresses from an internal ClusterIP range. These IPs are internal to the cluster and are not directly accessible from outside unless you use a LoadBalancer, NodePort, or Ingress.
2. External IP 1.1.1.1: If 1.1.1.1 is a public IP address you own or want to use, you typically achieve this by:
   1. LoadBalancer Service: On cloud providers (AWS, GCP, Azure), a LoadBalancer type service will provision an external IP (which you might then associate with 1.1.1.1 via DNS).
   2. NodePort Service + External Load Balancer: You can use a NodePort service and then configure an external load balancer (like HAProxy, Nginx, or a cloud LB) to forward traffic from 1.1.1.1 to your cluster's node ports.
   3. Ingress Controller: An Ingress controller (e.g., Nginx Ingress, Traefik) deployed in your cluster can expose services via a single external IP (which again, you'd associate with 1.1.1.1 via DNS).

Given this, I'll provide a Helm chart that deploys a simple web server (Nginx) and exposes it on port 80. I'll show you how to configure it for different service types, including a LoadBalancer which is the closest to what you're asking for in terms of getting an "external IP".

---

Helm Chart Structure:

my-webserver/  ├── Chart.yaml  ├── values.yaml  ├── templates/  │   ├── _helpers.tpl  │   ├── deployment.yaml  │   ├── service.yaml  │   └── ingress.yaml (optional, for Ingress example)  

---

1. Chart.yaml

This file defines the chart's metadata.

# my-webserver/Chart.yaml  apiVersion: v2  name: my-webserver  description: A Helm chart for deploying a simple web server (Nginx).  type: application  version: 0.1.0  appVersion: "1.25.3" # The version of the application this chart deploys (Nginx)  

---

2. values.yaml

This file contains the default configuration values for your chart. Users can override these values during installation.

# my-webserver/values.yaml  replicaCount: 1    image:    repository: nginx    pullPolicy: IfNotPresent    # Overrides the image tag whose default is the chart appVersion.    tag: "1.25.3"    service:    type: LoadBalancer # Or ClusterIP, NodePort, Ingress    port: 80    targetPort: 80 # The port your application inside the container listens on    # externalIPs: # Uncomment and specify if your Kubernetes environment supports static external IPs for LoadBalancer    #   - 1.1.1.1    ingress:    enabled: false    className: ""    annotations: {}      # kubernetes.io/ingress.class: nginx      # cert-manager.io/cluster-issuer: letsencrypt-prod    hosts:      - host: chart-example.local # Change this to your desired domain        paths:          - path: /            pathType: ImplementationSpecific    tls: []    #  - secretName: chart-example-tls    #    hosts:    #      - chart-example.local    resources: {}    # We usually recommend not to specify default resources and to leave this as a conscious    # choice for the user. This also increases chances charts will run on environments with little    # resources, such as Minikube.    # limits:    #   cpu: 100m    #   memory: 128Mi    # requests:    #   cpu: 100m    #   memory: 128Mi    nodeSelector: {}  tolerations: []  affinity: {}  

---

3. templates/_helpers.tpl

This file contains reusable template definitions.

{{/*  Expand the name of the chart.  */}}  {{- define "my-webserver.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 it is too long, we use a hash of it.  */}}  {{- define "my-webserver.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 part of the label.  */}}  {{- define "my-webserver.chart" -}}  {{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}  {{- end }}    {{/*  Common labels  */}}  {{- define "my-webserver.labels" -}}  helm.sh/chart: {{ include "my-webserver.chart" . }}  {{ include "my-webserver.selectorLabels" . }}  {{- if .Chart.AppVersion }}  app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}  {{- end }}  app.kubernetes.io/managed-by: {{ .Release.Service }}  {{- end }}    {{/*  Selector labels  */}}  {{- define "my-webserver.selectorLabels" -}}  app.kubernetes.io/name: {{ include "my-webserver.name" . }}  app.kubernetes.io/instance: {{ .Release.Name }}  {{- end }}  

---

4. templates/deployment.yaml

This defines the Kubernetes Deployment for your Nginx web server.

# my-webserver/templates/deployment.yaml  apiVersion: apps/v1  kind: Deployment  metadata:    name: {{ include "my-webserver.fullname" . }}    labels:      {{- include "my-webserver.labels" . | nindent 4 }}  spec:    {{- if not .Values.autoscaling.enabled }}    replicas: {{ .Values.replicaCount }}    {{- end }}    selector:      matchLabels:        {{- include "my-webserver.selectorLabels" . | nindent 6 }}    template:      metadata:        {{- with .Values.podAnnotations }}        annotations:          {{- toYaml . | nindent 8 }}        {{- end }}        labels:          {{- include "my-webserver.selectorLabels" . | nindent 8 }}      spec:        {{- with .Values.imagePullSecrets }}        imagePullSecrets:          {{- toYaml . | nindent 8 }}        {{- end }}        serviceAccountName: {{ include "my-webserver.serviceAccountName" . }}        securityContext:          {{- toYaml .Values.podSecurityContext | nindent 8 }}        containers:          - name: {{ .Chart.Name }}            securityContext:              {{- toYaml .Values.securityContext | nindent 12 }}            image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"            imagePullPolicy: {{ .Values.image.pullPolicy }}            ports:              - name: http                containerPort: {{ .Values.service.targetPort }}                protocol: TCP            livenessProbe:              httpGet:                path: /                port: http            readinessProbe:              httpGet:                path: /                port: http            resources:              {{- toYaml .Values.resources | nindent 12 }}        {{- with .Values.nodeSelector }}        nodeSelector:          {{- toYaml . | nindent 8 }}        {{- end }}        {{- with .Values.affinity }}        affinity:          {{- toYaml . | nindent 8 }}        {{- end }}        {{- with .Values.tolerations }}        tolerations:          {{- toYaml . | nindent 8 }}        {{- end }}  

---

5. templates/service.yaml

This defines the Kubernetes Service. This is where you configure the port and the type of service.

# my-webserver/templates/service.yaml  apiVersion: v1  kind: Service  metadata:    name: {{ include "my-webserver.fullname" . }}    labels:      {{- include "my-webserver.labels" . | nindent 4 }}  spec:    type: {{ .Values.service.type }}    ports:      - port: {{ .Values.service.port }}        targetPort: {{ .Values.service.targetPort }}        protocol: TCP        name: http    selector:      {{- include "my-webserver.selectorLabels" . | nindent 4 }}    {{- if and (eq .Values.service.type "LoadBalancer") .Values.service.externalIPs }}    externalIPs:      {{- toYaml .Values.service.externalIPs | nindent 4 }}    {{- end }}  

Explanation for externalIPs in service.yaml:
The externalIPs field on a LoadBalancer service is highly dependent on your Kubernetes cluster's cloud provider or on-premise setup.

1. Cloud Providers (AWS, GCP, Azure): Typically, you don't specify externalIPs for a LoadBalancer type service. The cloud controller manager automatically provisions a new, dynamic public IP address for the load balancer. If you need a static public IP, you usually provision it separately in your cloud provider and then configure your LoadBalancer service to use that pre-provisioned IP (the exact method varies by cloud).
2. On-Premise/Bare Metal with MetalLB/Similar: If you're using a solution like MetalLB for bare-metal LoadBalancer services, you can often specify externalIPs to assign a specific IP from a pre-configured pool.

Therefore, for 1.1.1.1:

1. If you're on a cloud provider, you'd likely get a dynamically assigned IP, then set up DNS (e.g., www.yourdomain.com pointing to that IP) or use a cloud-specific mechanism to associate a static IP.
2. If you're on-premise with a LoadBalancer solution that supports it, you could uncomment and set externalIPs: - 1.1.1.1 in values.yaml. However, 1.1.1.1 is a public DNS resolver, so you almost certainly don't own it for your web server. You'd use an IP address that belongs to your network.

---

6. templates/ingress.yaml (Optional - for Ingress controller exposure)

If you have an Ingress controller (like Nginx Ingress Controller) installed in your cluster, this is a better way to expose services via a domain name and manage TLS.

# my-webserver/templates/ingress.yaml  {{- if .Values.ingress.enabled -}}  apiVersion: networking.k8s.io/v1  kind: Ingress  metadata:    name: {{ include "my-webserver.fullname" . }}    {{- with .Values.ingress.annotations }}    annotations:      {{- toYaml . | nindent 4 }}    {{- end }}    labels:      {{- include "my-webserver.labels" . | nindent 4 }}  spec:    {{- if and .Values.ingress.className (semverCompare ">=1.19-0" .Capabilities.KubeVersion.GitVersion) }}    ingressClassName: {{ .Values.ingress.className }}    {{- end }}    {{- if .Values.ingress.tls }}    tls:      {{- toYaml .Values.ingress.tls | nindent 4 }}    {{- end }}    rules:      {{- range .Values.ingress.hosts }}      - host: {{ .host | quote }}        http:          paths:            {{- range .paths }}            - path: {{ .path }}              {{- if .pathType }}              pathType: {{ .pathType }}              {{- end }}              backend:                service:                  name: {{ include "my-webserver.fullname" $ }}                  port:                    number: {{ $.Values.service.port }}            {{- end }}      {{- end }}  {{- end }}  

---

How to Use This Helm Chart:

1. Save the files: Create the my-webserver directory and put the files in their respective locations as shown in the structure above.

2. Install the chart (using LoadBalancer - default):

   helm install my-webserver ./my-webserver  
   

3. Check the service status:

   kubectl get svc my-webserver-my-webserver  
   

   You should see output similar to this (the EXTERNAL-IP will be provisioned by your cloud provider or MetalLB):

   NAME                      TYPE           CLUSTER-IP     EXTERNAL-IP      PORT(S)        AGE  my-webserver-my-webserver LoadBalancer   10.X.X.X       A.B.C.D          80:3XXXX/TCP   2m  

   A.B.C.D will be the external IP address. This is the IP you would use to access your web server from outside the cluster.

4. Install with NodePort:
   If you don't have a LoadBalancer provisioner, you can use NodePort. This will expose the service on a specific port on each node in your cluster.

   helm install my-webserver-nodeport ./my-webserver --set service.type=NodePort  
   

   Then, find the node's IP and the assigned NodePort:

   kubectl get svc my-webserver-nodeport  kubectl get nodes -o wide  
   

   You can then access the web server using http://<NODE_IP>:<NODE_PORT>.

5. Install with Ingress (if you have an Ingress Controller):

   helm install my-webserver-ingress ./my-webserver \    --set service.type=ClusterIP \    --set ingress.enabled=true \    --set ingress.hosts[0].host=mywebapp.example.com \    --set ingress.hosts[0].paths[0].path=/ \    --set ingress.hosts[0].paths[0].pathType=Prefix  
   

   You'd then need to configure your DNS to point mywebapp.example.com to the external IP of your Ingress Controller.

Regarding 1.1.1.1:

As mentioned, 1.1.1.1 is a public DNS resolver operated by Cloudflare. You cannot simply "assign" it to your Kubernetes service.

1. If you own a public IP address: You would typically configure your cloud provider's LoadBalancer service to use that static IP, or use an on-premise solution like MetalLB that allows assigning specific IPs from a pool you control.
2. If you want to access your service via a custom domain name: The best practice is to use an Ingress controller (for HTTP/HTTPS traffic) or a LoadBalancer service and then configure DNS (e.g., a CNAME or A record) to point your desired domain name to the external IP provided by the LoadBalancer or Ingress controller.

This Helm chart provides a robust foundation for deploying your web server, allowing you to choose the appropriate service exposure method for your Kubernetes environment.

#K8 #kubernetes #helm #YAML #web #cloud #server #webserver #telecom #enterprise #xgnlab #cloudnative #container #docker #terraform #ansible