chore: Add initial Helm chart for MariaDB with templates and values

mariadb/Chart.yaml

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+apiVersion: v2
+name: mariadb
+description: A Helm chart for MariaDB
+type: application
+annotations:
+  version-source: dockerhub-tags:library/mariadb
+version: 0.1.0
+appVersion: "11.4.5"

mariadb/templates/_helpers.tpl

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+{{- define "mariadb.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{- define "mariadb.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 }}
+
+{{- define "mariadb.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{- define "mariadb.labels" -}}
+helm.sh/chart: {{ include "mariadb.chart" . }}
+{{ include "mariadb.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{- define "mariadb.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "mariadb.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}

mariadb/templates/backup-cronjob.yaml

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+{{- if .Values.backup.enabled }}
+apiVersion: batch/v1
+kind: CronJob
+metadata:
+  name: {{ include "mariadb.fullname" . }}-backup
+  labels:
+    {{- include "mariadb.labels" . | nindent 4 }}
+spec:
+  schedule: {{ .Values.backup.schedule | quote }}
+  jobTemplate:
+    spec:
+      template:
+        spec:
+          containers:
+            - name: mariadb-backup
+              image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
+              command:
+                - /bin/sh
+                - -c
+                - |
+                  mariadb-dump -h {{ include "mariadb.fullname" . }} -u root -p"$MARIADB_ROOT_PASSWORD" --all-databases \
+                    | gzip > /backup/mariadb-all-$(date +%Y%m%d-%H%M%S).sql.gz
+                  find /backup -name "mariadb-all-*.sql.gz" -mtime +$RETENTION_DAYS -delete
+              env:
+                - name: MARIADB_ROOT_PASSWORD
+                  valueFrom:
+                    secretKeyRef:
+                      name: {{ .Values.auth.existingSecret }}
+                      key: {{ .Values.auth.rootPasswordKey }}
+                - name: RETENTION_DAYS
+                  value: {{ .Values.backup.retentionDays | quote }}
+              volumeMounts:
+                - name: backup-storage
+                  mountPath: /backup
+          volumes:
+            - name: backup-storage
+              hostPath:
+                path: {{ .Values.backup.hostPath }}
+                type: DirectoryOrCreate
+          {{- if .Values.backup.node }}
+          nodeSelector:
+            kubernetes.io/hostname: {{ .Values.backup.node }}
+          {{- end }}
+          restartPolicy: OnFailure
+{{- end }}

mariadb/templates/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "mariadb.fullname" . }}
+  labels:
+    {{- include "mariadb.labels" . | nindent 4 }}
+  annotations:
+    version-source: dockerhub-tags:library/mariadb
+    kustomize.toolkit.fluxcd.io/prune: disabled
+spec:
+  replicas: {{ .Values.replicaCount }}
+  strategy:
+    type: Recreate
+  selector:
+    matchLabels:
+      {{- include "mariadb.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      labels:
+        {{- include "mariadb.selectorLabels" . | nindent 8 }}
+    spec:
+      containers:
+        - name: mariadb
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          ports:
+            - containerPort: {{ .Values.service.port }}
+          env:
+            - name: MARIADB_ROOT_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: {{ .Values.auth.existingSecret }}
+                  key: {{ .Values.auth.rootPasswordKey }}
+            - name: MARIADB_DATABASE
+              value: {{ .Values.auth.database | quote }}
+            {{- if .Values.auth.username }}
+            - name: MARIADB_USER
+              value: {{ .Values.auth.username | quote }}
+            - name: MARIADB_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: {{ .Values.auth.existingSecret }}
+                  key: {{ .Values.auth.passwordKey }}
+            {{- end }}
+          resources:
+            {{- toYaml .Values.resources | nindent 12 }}
+          volumeMounts:
+            - name: data
+              mountPath: /var/lib/mysql
+          readinessProbe:
+            exec:
+              command:
+                - mariadb-admin
+                - ping
+                - -h
+                - localhost
+            initialDelaySeconds: 15
+            periodSeconds: 10
+          livenessProbe:
+            exec:
+              command:
+                - mariadb-admin
+                - ping
+                - -h
+                - localhost
+            initialDelaySeconds: 30
+            periodSeconds: 10
+      volumes:
+        - name: data
+          {{- if .Values.persistence.existingClaim }}
+          persistentVolumeClaim:
+            claimName: {{ .Values.persistence.existingClaim }}
+          {{- else if .Values.persistence.enabled }}
+          persistentVolumeClaim:
+            claimName: {{ include "mariadb.fullname" . }}-data
+          {{- else }}
+          emptyDir: {}
+          {{- 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 }}

mariadb/templates/pvc.yaml

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+{{- if and .Values.persistence.enabled (not .Values.persistence.existingClaim) }}
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: {{ include "mariadb.fullname" . }}-data
+  labels:
+    {{- include "mariadb.labels" . | nindent 4 }}
+  annotations:
+    kustomize.toolkit.fluxcd.io/prune: disabled
+spec:
+  accessModes:
+    - ReadWriteOnce
+  storageClassName: {{ .Values.persistence.storageClass }}
+  resources:
+    requests:
+      storage: {{ .Values.persistence.size }}
+{{- end }}

mariadb/templates/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "mariadb.fullname" . }}
+  labels:
+    {{- include "mariadb.labels" . | nindent 4 }}
+spec:
+  type: {{ .Values.service.type }}
+  selector:
+    {{- include "mariadb.selectorLabels" . | nindent 4 }}
+  ports:
+    - port: {{ .Values.service.port }}
+      targetPort: {{ .Values.service.port }}
+      protocol: TCP
+      {{- if and (eq .Values.service.type "NodePort") .Values.service.nodePort }}
+      nodePort: {{ .Values.service.nodePort }}
+      {{- end }}

mariadb/values.yaml

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+replicaCount: 1
+
+image:
+  repository: mariadb
+  pullPolicy: IfNotPresent
+  tag: ""  # defaults to Chart.AppVersion
+
+nameOverride: ""
+fullnameOverride: ""
+
+auth:
+  database: mydatabase
+  username: ""
+  existingSecret: ""
+  rootPasswordKey: mariadb-root-password
+  passwordKey: mariadb-password
+
+persistence:
+  enabled: true
+  existingClaim: ""
+  storageClass: local-path
+  size: 5Gi
+
+service:
+  type: ClusterIP
+  port: 3306
+  nodePort: ""
+
+backup:
+  enabled: false
+  schedule: "0 5 * * *"
+  retentionDays: 7
+  hostPath: /storage/sdb/backups/mariadb
+  node: ""
+
+resources:
+  requests:
+    memory: 256Mi
+    cpu: 100m
+  limits:
+    memory: 1Gi
+    cpu: 500m
+
+nodeSelector: {}
+affinity: {}
+tolerations: []