Dingpf/adding postgresql helm chart

postgresql/.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/

postgresql/Chart.yaml

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+apiVersion: v2
+name: postgresql
+description: A PostgreSQL Helm chart for Kubernetes
+
+# 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: "17"

postgresql/README.md

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+# PostgreSQL Helm Chart
+
+This chart deploys PostgreSQL on Spin. Update the placeholders in `values.yaml`,
+or use the helper script to generate a rendered values file.
+
+## Prerequisites
+
+- `kubectl` and `helm` installed
+- Access to a Spin namespace and its kubeconfig
+
+See `tls-acme/README.md` for installation steps for kubectl/helm and kubeconfig.
+
+## Configure values
+
+1. Edit `postgresql/prepare-values.sh` with your settings.
+2. Generate a rendered values file:
+
+```bash
+./prepare-values.sh
+```
+
+This writes `values.rendered.yaml` (or a custom path if you pass one).
+
+## Install
+
+```bash
+helm install -n <namespace> -f values.rendered.yaml <release-name> .
+```
+
+## Upgrade or uninstall
+
+```bash
+helm upgrade -n <namespace> -f values.rendered.yaml <release-name> .
+helm uninstall -n <namespace> <release-name>
+```
+
+## Notes
+
+- Persistent volume size is controlled by `persistentVolumeClaims.testdb.size`.
+- Liveness and readiness probes use `pg_isready` with the configured database name and user.

postgresql/prepare-values.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+base_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+values_file="${1:-"${base_dir}/values.yaml"}"
+output_file="${2:-"${base_dir}/values.rendered.yaml"}"
+
+# Update these values before running this script.
+# Output goes to values.rendered.yaml unless you pass a second argument.
+nersc_user_id="75369"
+nersc_user_group="75369"
+app_name="postgresql"
+version_tag="17"
+deployment_name="pqdb"
+db_name="science"
+db_user_password="pwialks;d"
+db_user_name="user"
+pvc_size="10Gi"
+
+tmp_file="$(mktemp)"
+sed \
+  -e "s|{{nersc_user_id}}|${nersc_user_id}|g" \
+  -e "s|{{nersc_user_group}}|${nersc_user_group}|g" \
+  -e "s|{{app_name}}|${app_name}|g" \
+  -e "s|{{version_tag}}|${version_tag}|g" \
+  -e "s|{{deployment_name}}|${deployment_name}|g" \
+  -e "s|{{db_name}}|${db_name}|g" \
+  -e "s|{{db_user_password}}|${db_user_password}|g" \
+  -e "s|{{db_user_name}}|${db_user_name}|g" \
+  -e "s|{{pvc_size}}|${pvc_size}|g" \
+  "$values_file" > "$tmp_file"
+mv "$tmp_file" "$output_file"

postgresql/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 "postgresql.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.service.type }}
+     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+           You can watch its status by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "postgresql.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "postgresql.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 "postgresql.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 }}

postgresql/templates/_helpers.tpl

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

postgresql/templates/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "postgresql.fullname" . }}
+  labels:
+    {{- include "postgresql.labels" . | nindent 4 }}
+spec:
+  {{- if not .Values.autoscaling.enabled }}
+  replicas: {{ .Values.replicaCount }}
+  {{- end }}
+  selector:
+    matchLabels:
+      {{- include "postgresql.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      {{- with .Values.podAnnotations }}
+      annotations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      labels:
+        {{- include "postgresql.labels" . | nindent 8 }}
+        {{- with .Values.podLabels }}
+        {{- toYaml . | nindent 8 }}
+        {{- end }}
+    spec:
+      {{- with .Values.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      serviceAccountName: {{ include "postgresql.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 }}
+          env:
+            - name: POSTGRES_DB
+              value: {{ .Values.env.POSTGRES_DB }}
+            - name: POSTGRES_PASSWORD
+              value: {{ .Values.env.POSTGRES_PASSWORD }}
+            - name: POSTGRES_USER
+              value: {{ .Values.env.POSTGRES_USER }}
+            - name: TZ
+              value: {{ .Values.env.TZ }}
+            - name: PGDATA
+              value: {{ .Values.env.PGDATA }}
+          ports:
+            - name: tcp
+              containerPort: {{ .Values.service.port }}
+              protocol: TCP
+          {{- with .Values.livenessProbe }}
+          livenessProbe:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
+          {{- with .Values.readinessProbe }}
+          readinessProbe:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
+          resources:
+            {{- toYaml .Values.resources | nindent 12 }}
+          {{- with .Values.volumeMounts }}
+          volumeMounts:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
+      {{- with .Values.volumes }}
+      volumes:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}

postgresql/templates/hpa.yaml

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

postgresql/templates/ingress.yaml

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+{{- if .Values.ingress.enabled -}}
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: {{ include "postgresql.fullname" . }}
+  labels:
+    {{- include "postgresql.labels" . | nindent 4 }}
+  {{- with .Values.ingress.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+spec:
+  {{- with .Values.ingress.className }}
+  ingressClassName: {{ . }}
+  {{- 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 }}
+            {{- with .pathType }}
+            pathType: {{ . }}
+            {{- end }}
+            backend:
+              service:
+                name: {{ include "postgresql.fullname" $ }}
+                port:
+                  number: {{ $.Values.service.port }}
+          {{- end }}
+    {{- end }}
+{{- end }}

postgresql/templates/loadbalancer.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "postgresql.fullname" . }}-lb
+  labels:
+    {{- include "postgresql.labels" . | nindent 4 }}
+spec:
+  type: LoadBalancer
+  ports:
+    - port: {{ .Values.service.port }}
+      targetPort: {{ .Values.service.port }}
+      protocol: TCP
+      name: {{ .Values.service.port }}tcp{{ .Values.service.port }}
+  selector:
+    {{- include "postgresql.selectorLabels" . | nindent 4 }}