postgres helm

charts/postgres/Chart.yaml

@@ -0,0 +1,6 @@
+apiVersion: v2
+name: postgresql-helm-chart
+description: A Helm chart for PostgreSQL
+version: 0.1.0
+appVersion: "12.6"
+

charts/postgres/templates/NOTES.txt

@@ -0,0 +1,24 @@
+{{- if .Values.ingress }}
+  {{- if .Values.ingress.enabled }}
+    {{- range $host := .Values.ingress.hosts }}
+      {{- range .paths }}
+        http{{ if $.Values.ingress.tls }}s{{ end }}://{{ $host.host }}{{ .path }}
+      {{- end }}
+    {{- end }}
+  {{- end }}
+{{- else if contains "NodePort" .Values.service.type }}
+  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "postgres.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.service.type }}
+  NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+  You can watch its status by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "postgres.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "postgres.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 "postgres.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/postgresssql/templates/_helpers.tpl → charts/postgres/templates/_helpers.tpl

@@ -1,14 +1,16 @@
 {{/*
 Expand the name of the chart.
 */}}
-{{- define "postgresql-helm.name" -}}
+{{- define "postgres.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-helm.fullname" -}}
+{{- define "postgres.fullname" -}}
 {{- if .Values.fullnameOverride }}
 {{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
 {{- else }}
@@ -24,24 +26,37 @@ Create a default fully qualified app name.
 {{/*
 Create chart name and version as used by the chart label.
 */}}
-{{- define "postgresql-helm.chart" -}}
+{{- define "postgres.chart" -}}
 {{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
 {{- end }}
 
 {{/*
 Common labels
 */}}
-{{- define "postgresql-helm.labels" -}}
-app.kubernetes.io/name: {{ include "postgresql-helm.name" . }}
-helm.sh/chart: {{ include "postgresql-helm.chart" . }}
-app.kubernetes.io/instance: {{ .Release.Name }}
+{{- define "postgres.labels" -}}
+helm.sh/chart: {{ include "postgres.chart" . }}
+{{ include "postgres.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
 app.kubernetes.io/managed-by: {{ .Release.Service }}
 {{- end }}
 
 {{/*
 Selector labels
 */}}
-{{- define "postgresql-helm.selectorLabels" -}}
-app.kubernetes.io/name: {{ include "postgresql-helm.name" . }}
+{{- define "postgres.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "postgres.name" . }}
 app.kubernetes.io/instance: {{ .Release.Name }}
 {{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "postgres.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "postgres.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}

charts/postgres/templates/configmap.yaml

@@ -0,0 +1,8 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: postgresql-config
+data:
+  POSTGRES_DB: {{ default (randAlphaNum 8) .Values.configMap.databaseName }}
+  POSTGRES_USER: {{ default (randAlphaNum 8) .Values.configMap.user }}
+

charts/postgres/templates/deployment.yaml

@@ -0,0 +1,37 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: postgresql
+spec:
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      app: postgresql
+  template:
+    metadata:
+      labels:
+        app: postgresql
+    spec:
+      containers:
+        - name: postgresql
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          env:
+            - name: POSTGRES_DB
+              valueFrom:
+                configMapKeyRef:
+                  name: postgresql-config
+                  key: POSTGRES_DB
+            - name: POSTGRES_USER
+              valueFrom:
+                configMapKeyRef:
+                  name: postgresql-config
+                  key: POSTGRES_USER
+            - name: POSTGRES_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: postgresql-secret
+                  key: password
+          ports:
+            - containerPort: 5432
+

charts/postgres/templates/secrets.yaml

@@ -0,0 +1,8 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: postgresql-secret
+type: Opaque
+data:
+  password: {{ default (randAlphaNum 16) .Values.secret.password | b64enc | quote }}
+

charts/postgres/templates/service.yaml

@@ -0,0 +1,12 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: postgresql-headless
+spec:
+  clusterIP: None
+  ports:
+    - port: {{ .Values.service.port }}
+      targetPort: 5432
+  selector:
+    app: postgresql
+

charts/postgres/templates/tests/test-connection.yaml

@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: "{{ include "postgres.fullname" . }}-test-connection"
+  labels:
+    {{- include "postgres.labels" . | nindent 4 }}
+  annotations:
+    "helm.sh/hook": test
+spec:
+  containers:
+    - name: wget
+      image: busybox
+      command: ['wget']
+      args: ['{{ include "postgres.fullname" . }}:{{ .Values.service.port }}']
+  restartPolicy: Never

charts/postgres/values.yaml

@@ -0,0 +1,32 @@
+replicaCount: 1
+
+image:
+  repository: postgres
+  tag: "12.6"
+  pullPolicy: IfNotPresent
+
+service:
+  type: ClusterIP
+  port: 5432
+
+configMap:
+  databaseName: mydatabase
+  user: myuser
+
+secret:
+  password: changeme
+
+resources:
+  requests:
+    memory: "512Mi"
+    cpu: "500m"
+  limits:
+    memory: "10Gi"
+    cpu: "1"
+
+nodeSelector: {}
+
+tolerations: []
+
+affinity: {}
+