Creating edge-proxy helm chart

charts/edge-proxy/.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/edge-proxy/Chart.yaml

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+apiVersion: v2
+name: edge-proxy
+description: A Helm chart for deploying the Flagsmith Edge Proxy
+
+# 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: "2.15.0"

charts/edge-proxy/README.md

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+# Flagsmith Edge Proxy Helm chart
+![Version: 0.1.0](https://img.shields.io/badge/Version-0.1.0-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 2.15.0](https://img.shields.io/badge/AppVersion-2.15.0-informational?style=flat-square)
+
+Helm chart for deploying the [Flagsmith Edge Proxy](https://docs.flagsmith.com/advanced-use/edge-proxy) to Kubernetes.
+
+## Usage
+### Setup the Flagsmith chart repository
+```
+helm repo add flagsmith https://flagsmith.github.io/flagsmith-charts/
+helm repo update
+```
+
+### Install the chart
+```
+helm install edge-proxy flagsmith/edge-proxy
+```
+
+## Values
+
+### Edge Proxy configuration values
+
+| Key | Type | Default | Description |
+|-----|------|---------|-------------|
+| edgeProxy.configMap.content | string | `""` | Content to assign to the new ConfigMap.  This is passed into `tpl` allowing for templating from values. |
+| edgeProxy.configMap.create | bool | `true` | Create a new ConfigMap for the config file. |
+| edgeProxy.configMap.key | string | `nil` | Key in ConfigMap to get config from. |
+| edgeProxy.configMap.name | string | `nil` | Name of existing ConfigMap to use. Used when create is false. |
+| edgeProxy.envFrom | list | `[]` | Maps all the keys on a ConfigMap or Secret as environment variables. https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.24/#envfromsource-v1-core |
+| edgeProxy.extraEnv | list | `[]` | Extra environment variables to pass to the Edge Proxy container. |
+----------------------------------------------
+
+#### edgeProxy.configMap
+`edgeProxy.configMap` Holds the Flagsmith Edge Proxy configuration to use.
+
+If `edgeProxy.configMap.create` is `true`, a configMap will be created using the contents defined in `edgeProxy.configMap.content`.
+
+If `edgeProxy.configMap.content` is not provided, a default/example configuration is used - you can view it in `config/config.json`.
+
+You can also set `edgeProxy.configMap.create` to `false` and provide the name of an already existing ConfigMap using `edgeProxy.configMap.name`
+
+
+### Other values
+
+| Key | Type | Default | Description |
+|-----|------|---------|-------------|
+| affinity | object | `{}` |  |
+| autoscaling.enabled | bool | `false` |  |
+| autoscaling.maxReplicas | int | `100` |  |
+| autoscaling.minReplicas | int | `1` |  |
+| autoscaling.targetCPUUtilizationPercentage | int | `80` |  |
+| fullnameOverride | string | `""` |  |
+| image.pullPolicy | string | `"IfNotPresent"` |  |
+| image.repository | string | `"flagsmith/edge-proxy"` |  |
+| image.tag | string | `nil` |  |
+| imagePullSecrets | list | `[]` |  |
+| ingress.annotations | object | `{}` |  |
+| ingress.className | string | `""` |  |
+| ingress.enabled | bool | `false` |  |
+| ingress.hosts[0].host | string | `"chart-example.local"` |  |
+| ingress.hosts[0].paths[0].path | string | `"/"` |  |
+| ingress.hosts[0].paths[0].pathType | string | `"ImplementationSpecific"` |  |
+| ingress.tls | list | `[]` |  |
+| nameOverride | string | `""` |  |
+| nodeSelector | object | `{}` |  |
+| podAnnotations | object | `{}` |  |
+| podSecurityContext | object | `{}` |  |
+| replicaCount | int | `1` |  |
+| resources | object | `{}` |  |
+| securityContext | object | `{}` |  |
+| service.port | int | `8000` |  |
+| service.type | string | `"ClusterIP"` |  |
+| serviceAccount.annotations | object | `{}` |  |
+| serviceAccount.create | bool | `true` |  |
+| serviceAccount.name | string | `""` |  |
+| tolerations | list | `[]` |  |
+
+----------------------------------------------
+
+

charts/edge-proxy/config/config.json

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+{
+  "environment_key_pairs": [
+   {
+    "server_side_key": "your_server_side_environment_key",
+    "client_side_key": "your_client_side_environment_key"
+   }
+  ],
+  "api_poll_frequency": 10
+ }
+

charts/edge-proxy/templates/NOTES.txt

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

charts/edge-proxy/templates/_config.tpl

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+{{/*
+Retrieve configMap name from the name of the chart or the ConfigMap the user
+specified.
+*/}}
+{{- define "edge-proxy.config-map.name" -}}
+{{- if .Values.edgeProxy.configMap.name -}}
+{{- .Values.edgeProxy.configMap.name }}
+{{- else -}}
+{{- include "edge-proxy.fullname" . }}
+{{- end }}
+{{- end }}
+
+{{/*
+The name of the config file is the default or the key the user specified in the
+ConfigMap.
+*/}}
+{{- define "edge-proxy.config-map.key" -}}
+{{- if .Values.edgeProxy.configMap.key -}}
+{{- .Values.edgeProxy.configMap.key }}
+{{- else -}}
+config.json
+{{- end }}
+{{- end }}

charts/edge-proxy/templates/_helpers.tpl

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+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "edge-proxy.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 "edge-proxy.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 "edge-proxy.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "edge-proxy.labels" -}}
+helm.sh/chart: {{ include "edge-proxy.chart" . }}
+{{ include "edge-proxy.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "edge-proxy.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "edge-proxy.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "edge-proxy.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "edge-proxy.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}
+
+{{/*
+Calculate image tag for Flagsmith edge proxy.
+*/}}
+{{- define "edge-proxy.imageTag" -}}
+{{- if .Values.image.tag }}
+{{- printf ":%s" .Values.image.tag }}
+{{- else }}
+{{- printf ":%s" .Chart.AppVersion }}
+{{- end }}
+{{- end }}

charts/edge-proxy/templates/configmap.yaml

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+{{- $values := .Values.edgeProxy -}}
+{{- if $values.configMap.create }}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ include "edge-proxy.fullname" . }}
+  labels:
+    {{- include "edge-proxy.labels" . | nindent 4 }}
+    app.kubernetes.io/component: config
+data:
+  {{- if $values.configMap.content }}
+  config.json: |- {{- (tpl  $values.configMap.content .) | nindent 4 }}
+  {{- else }}
+  config.json: |- {{- .Files.Get "config/config.json" | trim | nindent 4 }}
+  {{- end }}
+{{- end }}

charts/edge-proxy/templates/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "edge-proxy.fullname" . }}
+  labels:
+    {{- include "edge-proxy.labels" . | nindent 4 }}
+spec:
+  {{- if not .Values.autoscaling.enabled }}
+  replicas: {{ .Values.replicaCount }}
+  {{- end }}
+  revisionHistoryLimit: 2
+  selector:
+    matchLabels:
+      {{- include "edge-proxy.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      {{- with .Values.podAnnotations }}
+      annotations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      labels:
+        {{- include "edge-proxy.selectorLabels" . | nindent 8 }}
+    spec:
+      {{- with .Values.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      serviceAccountName: {{ include "edge-proxy.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.port }}
+              protocol: TCP
+          livenessProbe:
+            httpGet:
+              path: /proxy/health
+              port: http
+          readinessProbe:
+            httpGet:
+              path: /proxy/health
+              port: http
+          resources:
+            {{- toYaml .Values.resources | nindent 12 }}
+          env:
+            {{- range .Values.edgeProxy.extraEnv }}
+            - {{- toYaml . | nindent 14 }}
+            {{- end }}
+          {{- if .Values.edgeProxy.envFrom }}
+          envFrom:
+            {{- toYaml .Values.edgeProxy.envFrom | nindent 12 }}
+          {{- end }}
+          volumeMounts:
+            - name: config
+              mountPath: /app/config.json
+              subPath: config.json
+      volumes:
+        - name: config
+          configMap:
+            name: {{ include "edge-proxy.config-map.name" . }}
+      {{- with .Values.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}

charts/edge-proxy/templates/hpa.yaml

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+{{- if .Values.autoscaling.enabled }}
+apiVersion: autoscaling/v2beta1
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ include "edge-proxy.fullname" . }}
+  labels:
+    {{- include "edge-proxy.labels" . | nindent 4 }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ include "edge-proxy.fullname" . }}
+  minReplicas: {{ .Values.autoscaling.minReplicas }}
+  maxReplicas: {{ .Values.autoscaling.maxReplicas }}
+  metrics:
+    {{- if .Values.autoscaling.targetCPUUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: cpu
+        targetAverageUtilization: {{ .Values.autoscaling.targetCPUUtilizationPercentage }}
+    {{- end }}
+    {{- if .Values.autoscaling.targetMemoryUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: memory
+        targetAverageUtilization: {{ .Values.autoscaling.targetMemoryUtilizationPercentage }}
+    {{- end }}
+{{- end }}