add secret, install instructions

INSTALL.md

@@ -0,0 +1,152 @@
+# k8s-pulse Helm Chart Installation Guide
+
+This guide provides instructions on installing **k8s-pulse** using Helm and configuring the `kubeconfig` secret to match the container setup in `docker-compose.yml`.
+
+## Prerequisites
+
+- A running Kubernetes cluster (v1.19+ recommended).
+- [Helm v3+](https://helm.sh/) installed.
+- (Optional) Metrics Server installed in your cluster for detailed container CPU & memory usage.
+
+## Kubeconfig & Secret Setup
+
+To mirror the `docker-compose.yml` setup where `KUBECONFIG=/root/.kube/config` is mounted into the container, the Helm chart mounts a Kubernetes `Secret` containing your `kubeconfig` file to `/root/.kube/config` and sets the `KUBECONFIG` environment variable.
+
+You can configure and set up the `kubeconfig` secret using one of the following methods:
+
+### Method 1: Create a Kubernetes Secret manually with `kubectl` (Recommended)
+
+1. Create a secret containing your `.kube/config` file:
+   ```bash
+   kubectl create secret generic k8s-pulse-kubeconfig --from-file=config=$HOME/.kube/config
+   ```
+
+2. Install or upgrade the Helm chart specifying the existing secret:
+   ```bash
+   helm install k8s-pulse ./helm-chart \
+     --set kubeconfig.enabled=true \
+     --set kubeconfig.secretName=k8s-pulse-kubeconfig
+   ```
+
+### Method 2: Create the Secret via Helm using `--set-file`
+
+You can have Helm create the `Secret` resource directly from your local `kubeconfig` file during installation:
+
+```bash
+helm install k8s-pulse ./helm-chart \
+  --set kubeconfig.enabled=true \
+  --set kubeconfig.createSecret=true \
+  --set-file kubeconfig.content=$HOME/.kube/config
+```
+
+### Method 3: Use a custom `values.yaml` file
+
+Create a custom values file (e.g. `my-values.yaml`):
+
+```yaml
+kubeconfig:
+  enabled: true
+  createSecret: true
+  secretName: "k8s-pulse-kubeconfig"
+  secretKey: "config"
+  mountPath: "/root/.kube/config"
+  content: |
+    apiVersion: v1
+    clusters:
+    - cluster:
+        server: https://127.0.0.1:6443
+      name: my-cluster
+    ...
+```
+
+Then install the chart using:
+
+```bash
+helm install k8s-pulse ./helm-chart -f my-values.yaml
+```
+
+---
+
+## Quick Start
+
+### 1. Install the Chart
+
+Default installation (uses `kubeconfig.enabled=true` with secret `<release-name>-kubeconfig`):
+
+```bash
+# 1. Create the secret
+kubectl create secret generic k8s-pulse-kubeconfig --from-file=config=$HOME/.kube/config
+
+# 2. Install the chart
+helm install k8s-pulse ./helm-chart --set kubeconfig.secretName=k8s-pulse-kubeconfig
+```
+
+### 2. Custom Configuration
+
+You can override default settings by passing a custom `values.yaml` file or using `--set`:
+
+```bash
+helm install k8s-pulse ./helm-chart -f custom-values.yaml
+```
+
+Example: Enable Ingress and change image tag:
+
+```bash
+helm install k8s-pulse ./helm-chart \
+  --set image.tag="1.0.0" \
+  --set ingress.enabled=true \
+  --set ingress.hosts[0].host="k8s-pulse.example.com"
+```
+
+### 3. Upgrade the Release
+
+```bash
+helm upgrade k8s-pulse ./helm-chart
+```
+
+### 4. Uninstall
+
+```bash
+helm uninstall k8s-pulse
+```
+
+---
+
+## Configuration Parameters
+
+| Parameter | Description | Default |
+|-----------|-------------|---------|
+| `replicaCount` | Number of application replicas | `1` |
+| `image.repository` | Docker image repository | `k8s-pulse` |
+| `image.tag` | Docker image tag | `latest` |
+| `image.pullPolicy` | Image pull policy | `IfNotPresent` |
+| `kubeconfig.enabled` | Enable mounting kubeconfig Secret and `KUBECONFIG` env var | `true` |
+| `kubeconfig.secretName` | Name of existing Secret containing kubeconfig file | `""` (defaults to `<release-fullname>-kubeconfig`) |
+| `kubeconfig.createSecret` | Create Secret resource via Helm from `kubeconfig.content` | `false` |
+| `kubeconfig.content` | Raw kubeconfig content when `createSecret` is true | `""` |
+| `kubeconfig.secretKey` | Secret data key containing kubeconfig file content | `"config"` |
+| `kubeconfig.mountPath` | Container path to mount kubeconfig file and set `KUBECONFIG` env | `"/root/.kube/config"` |
+| `service.type` | Kubernetes service type | `ClusterIP` |
+| `service.port` | Service port exposed | `80` |
+| `service.targetPort` | Container application port | `5000` |
+| `rbac.create` | Create ClusterRole & ClusterRoleBinding for K8s API access | `true` |
+| `serviceAccount.create` | Create ServiceAccount for the deployment | `true` |
+| `serviceAccount.name` | Explicit ServiceAccount name | `""` |
+| `ingress.enabled` | Enable Ingress resource | `false` |
+| `resources` | Pod CPU/Memory resource limits & requests | `{ limits: { cpu: 200m, memory: 256Mi }, requests: { cpu: 100m, memory: 128Mi } }` |
+| `persistence.enabled` | Enable optional PersistentVolumeClaim | `false` |
+
+---
+
+## RBAC Requirements
+
+`k8s-pulse` requires read access to cluster nodes, pods, and `metrics.k8s.io` custom objects. By default, `rbac.create: true` creates a `ClusterRole` and `ClusterRoleBinding` bound to the pod's `ServiceAccount`.
+
+## Verification
+
+Check the deployment status:
+
+```bash
+kubectl get pods -l app.kubernetes.io/name=k8s-pulse
+kubectl get svc -l app.kubernetes.io/name=k8s-pulse
+```

helm-chart/INSTALL.md

@@ -5,17 +5,80 @@ This Helm chart provides a production-ready Kubernetes deployment for **k8s-puls
 ## Prerequisites
 
 - A running Kubernetes cluster (v1.19+ recommended).
-- [Helm v3](https://helm.sh/) installed.
+- [Helm v3+](https://helm.sh/) installed.
 - (Optional) Metrics Server installed in your cluster for detailed container CPU & memory usage.
 
+## Kubeconfig & Secret Setup
+
+To mirror the `docker-compose.yml` setup where `KUBECONFIG=/root/.kube/config` is mounted into the container, the Helm chart mounts a Kubernetes `Secret` containing your `kubeconfig` file to `/root/.kube/config` and sets the `KUBECONFIG` environment variable.
+
+You can configure and set up the `kubeconfig` secret using one of the following methods:
+
+### Method 1: Create a Kubernetes Secret manually with `kubectl` (Recommended)
+
+1. Create a secret containing your `.kube/config` file:
+   ```bash
+   kubectl create secret generic k8s-pulse-kubeconfig --from-file=config=$HOME/.kube/config
+   ```
+
+2. Install or upgrade the Helm chart specifying the existing secret:
+   ```bash
+   helm install k8s-pulse ./helm-chart \
+     --set kubeconfig.enabled=true \
+     --set kubeconfig.secretName=k8s-pulse-kubeconfig
+   ```
+
+### Method 2: Create the Secret via Helm using `--set-file`
+
+You can have Helm create the `Secret` resource directly from your local `kubeconfig` file during installation:
+
+```bash
+helm install k8s-pulse ./helm-chart \
+  --set kubeconfig.enabled=true \
+  --set kubeconfig.createSecret=true \
+  --set-file kubeconfig.content=$HOME/.kube/config
+```
+
+### Method 3: Use a custom `values.yaml` file
+
+Create a custom values file (e.g. `my-values.yaml`):
+
+```yaml
+kubeconfig:
+  enabled: true
+  createSecret: true
+  secretName: "k8s-pulse-kubeconfig"
+  secretKey: "config"
+  mountPath: "/root/.kube/config"
+  content: |
+    apiVersion: v1
+    clusters:
+    - cluster:
+        server: https://127.0.0.1:6443
+      name: my-cluster
+    ...
+```
+
+Then install the chart using:
+
+```bash
+helm install k8s-pulse ./helm-chart -f my-values.yaml
+```
+
+---
+
 ## Quick Start
 
 ### 1. Install the Chart
 
-To install the chart with default release name `k8s-pulse`:
+Default installation (uses `kubeconfig.enabled=true` with secret `<release-name>-kubeconfig`):
 
 ```bash
-helm install k8s-pulse ./helm-chart
+# 1. Create the secret
+kubectl create secret generic k8s-pulse-kubeconfig --from-file=config=$HOME/.kube/config
+
+# 2. Install the chart
+helm install k8s-pulse ./helm-chart --set kubeconfig.secretName=k8s-pulse-kubeconfig
 ```
 
 ### 2. Custom Configuration
@@ -47,6 +110,8 @@ helm upgrade k8s-pulse ./helm-chart
 helm uninstall k8s-pulse
 ```
 
+---
+
 ## Configuration Parameters
 
 | Parameter | Description | Default |
@@ -55,6 +120,12 @@ helm uninstall k8s-pulse
 | `image.repository` | Docker image repository | `k8s-pulse` |
 | `image.tag` | Docker image tag | `latest` |
 | `image.pullPolicy` | Image pull policy | `IfNotPresent` |
+| `kubeconfig.enabled` | Enable mounting kubeconfig Secret and `KUBECONFIG` env var | `true` |
+| `kubeconfig.secretName` | Name of existing Secret containing kubeconfig file | `""` (defaults to `<release-fullname>-kubeconfig`) |
+| `kubeconfig.createSecret` | Create Secret resource via Helm from `kubeconfig.content` | `false` |
+| `kubeconfig.content` | Raw kubeconfig content when `createSecret` is true | `""` |
+| `kubeconfig.secretKey` | Secret data key containing kubeconfig file content | `"config"` |
+| `kubeconfig.mountPath` | Container path to mount kubeconfig file and set `KUBECONFIG` env | `"/root/.kube/config"` |
 | `service.type` | Kubernetes service type | `ClusterIP` |
 | `service.port` | Service port exposed | `80` |
 | `service.targetPort` | Container application port | `5000` |
@@ -65,6 +136,8 @@ helm uninstall k8s-pulse
 | `resources` | Pod CPU/Memory resource limits & requests | `{ limits: { cpu: 200m, memory: 256Mi }, requests: { cpu: 100m, memory: 128Mi } }` |
 | `persistence.enabled` | Enable optional PersistentVolumeClaim | `false` |
 
+---
+
 ## RBAC Requirements
 
 `k8s-pulse` requires read access to cluster nodes, pods, and `metrics.k8s.io` custom objects. By default, `rbac.create: true` creates a `ClusterRole` and `ClusterRoleBinding` bound to the pod's `ServiceAccount`.

helm-chart/templates/_helpers.tpl

@@ -60,3 +60,15 @@ Create the name of the service account to use
 {{- default "default" .Values.serviceAccount.name }}
 {{- end }}
 {{- end }}
+
+{{/*
+Create the name of the kubeconfig secret to use
+*/}}
+{{- define "k8s-pulse.kubeconfigSecretName" -}}
+{{- if .Values.kubeconfig.secretName }}
+{{- .Values.kubeconfig.secretName }}
+{{- else }}
+{{- printf "%s-kubeconfig" (include "k8s-pulse.fullname" .) }}
+{{- end }}
+{{- end }}
+

helm-chart/templates/deployment.yaml

@@ -31,6 +31,11 @@ spec:
             {{- toYaml .Values.securityContext | nindent 12 }}
           image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
           imagePullPolicy: {{ .Values.image.pullPolicy }}
+          {{- if .Values.kubeconfig.enabled }}
+          env:
+            - name: KUBECONFIG
+              value: {{ .Values.kubeconfig.mountPath | quote }}
+          {{- end }}
           ports:
             - name: http
               containerPort: {{ .Values.service.targetPort }}
@@ -49,17 +54,32 @@ spec:
             periodSeconds: 10
           resources:
             {{- toYaml .Values.resources | nindent 12 }}
-          {{- if .Values.persistence.enabled }}
+          {{- if or .Values.persistence.enabled .Values.kubeconfig.enabled }}
           volumeMounts:
+            {{- if .Values.persistence.enabled }}
             - name: data
               mountPath: /app/data
             {{- end }}
-      {{- if .Values.persistence.enabled }}
+            {{- if .Values.kubeconfig.enabled }}
+            - name: kubeconfig-volume
+              mountPath: {{ .Values.kubeconfig.mountPath | quote }}
+              subPath: {{ .Values.kubeconfig.secretKey | default "config" | quote }}
+              readOnly: true
+            {{- end }}
+          {{- end }}
+      {{- if or .Values.persistence.enabled .Values.kubeconfig.enabled }}
       volumes:
+        {{- if .Values.persistence.enabled }}
         - name: data
           persistentVolumeClaim:
             claimName: {{ include "k8s-pulse.fullname" . }}-data
         {{- end }}
+        {{- if .Values.kubeconfig.enabled }}
+        - name: kubeconfig-volume
+          secret:
+            secretName: {{ include "k8s-pulse.kubeconfigSecretName" . }}
+        {{- end }}
+      {{- end }}
       {{- with .Values.nodeSelector }}
       nodeSelector:
         {{- toYaml . | nindent 8 }}

helm-chart/templates/secret.yaml

@@ -0,0 +1,12 @@
+{{- if and .Values.kubeconfig.enabled .Values.kubeconfig.createSecret }}
+apiVersion: v1
+kind: Secret
+metadata:
+  name: {{ include "k8s-pulse.kubeconfigSecretName" . }}
+  labels:
+    {{- include "k8s-pulse.labels" . | nindent 4 }}
+type: Opaque
+stringData:
+  {{ .Values.kubeconfig.secretKey | default "config" }}: |
+    {{- .Values.kubeconfig.content | nindent 4 }}
+{{- end }}

helm-chart/values.yaml

@@ -12,6 +12,22 @@ imagePullSecrets: []
 nameOverride: ""
 fullnameOverride: ""
 
+# Kubeconfig configuration & secret mounting
+kubeconfig:
+  # Enable mounting kubeconfig Secret into the pod
+  enabled: true
+  # Name of existing secret containing kubeconfig.
+  # If empty and createSecret is true, defaults to "<fullname>-kubeconfig"
+  secretName: ""
+  # Set to true to create a Secret resource from 'content'
+  createSecret: false
+  # Content of the kubeconfig file when createSecret is true
+  content: ""
+  # Key name inside the secret containing kubeconfig data
+  secretKey: "config"
+  # Path inside container where kubeconfig is mounted
+  mountPath: "/root/.kube/config"
+
 rbac:
   create: true
 

version.ini

@@ -1,2 +1,2 @@
 [metadata]
-version = 0.1
+version = 0.2