tools/redis/templates/statefulset.yaml

# -----------------------------------------------------------------------------
# templates/statefulset.yaml
# -----------------------------------------------------------------------------
{{""}}
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: {{ include "keydb-custom.fullname" . }}
  labels:
    app: {{ include "keydb-custom.name" . }}
spec:
  serviceName: {{ include "keydb-custom.fullname" . }}-headless
  replicas: {{ .Values.replicaCount }}
  selector:
    matchLabels:
      app: {{ include "keydb-custom.name" . }}
  template:
    metadata:
      labels:
        app: {{ include "keydb-custom.name" . }}
    spec:
      {{- if .Values.nodeAffinity }}
      affinity:
        nodeAffinity: {{ toYaml .Values.nodeAffinity | nindent 8 }}
      {{- end }}
      {{- if .Values.podAntiAffinity.enabled }}
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchExpressions:
                  - key: "app"
                    operator: In
                    values:
                      - {{ include "keydb-custom.name" . }}
              topologyKey: "kubernetes.io/hostname"
      {{- end }}
      containers:
        - name: keydb
          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
          imagePullPolicy: {{ .Values.image.pullPolicy }}
          ports:
            - name: keydb
              containerPort: {{ .Values.service.port }}
          env:
            - name: KEYDB_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: {{ include "keydb-custom.fullname" . }}-auth
                  key: password
            - name: KEYDB_CONF_FILE
              value: "/etc/keydb/keydb.conf"
          volumeMounts:
            - name: keydb-conf
              mountPath: /etc/keydb
            - name: data
              mountPath: /bitnami/keydb
          resources:
            {{ toYaml .Values.resources | nindent 12 }}
          command:
            - sh
            - -c
            - |
              # Startup logic:
              # - pod index 0 starts as master
              # - pod index >0 will start and then configure REPLICAOF to master
              POD_NAME=$(hostname)
              # derive ordinal from pods named <release>-<ordinal>
              ORDINAL=${POD_NAME##*-}
              # start keydb-server in background to accept CONFIG/CLI commands
              keydb-server /etc/keydb/keydb.conf &
              sleep 1
              if [ "${ORDINAL}" != "0" ]; then
                # wait for master to be ready
                MASTER_HOST={{ include "keydb-custom.fullname" . }}-0.{{ include "keydb-custom.fullname" . }}-headless
                until nc -z ${MASTER_HOST} {{ .Values.service.port }}; do sleep 1; done
                # configure replication (use CLI to set replicaof)
                if [ -n "$KEYDB_PASSWORD" ]; then
                  keydb-cli -a "$KEYDB_PASSWORD" REPLICAOF ${MASTER_HOST} {{ .Values.service.port }}
                else
                  keydb-cli REPLICAOF ${MASTER_HOST} {{ .Values.service.port }}
                fi
                echo "Configured replicaof ${MASTER_HOST}:{{ .Values.service.port }}"
                # tail logs (block) to keep container running
                wait
              else
                # master: block on server process
                wait
              fi
          readinessProbe:
            {{- if .Values.readinessProbe.enabled }}
            exec:
              command:
                - sh
                - -c
                - |
                  # quick PING check
                  if [ -n "$KEYDB_PASSWORD" ]; then
                    keydb-cli -a "$KEYDB_PASSWORD" PING > /dev/null 2>&1 && exit 0 || exit 1
                  else
                    keydb-cli PING > /dev/null 2>&1 && exit 0 || exit 1
                  fi
            initialDelaySeconds: {{ .Values.readinessProbe.initialDelaySeconds }}
            periodSeconds: {{ .Values.readinessProbe.periodSeconds }}
            timeoutSeconds: {{ .Values.readinessProbe.timeoutSeconds }}
            {{- end }}
          livenessProbe:
            {{- if .Values.livenessProbe.enabled }}
            exec:
              command:
                - sh
                - -c
                - |
                  if [ -n "$KEYDB_PASSWORD" ]; then
                    keydb-cli -a "$KEYDB_PASSWORD" PING > /dev/null 2>&1 && exit 0 || exit 1
                  else
                    keydb-cli PING > /dev/null 2>&1 && exit 0 || exit 1
                  fi
            initialDelaySeconds: {{ .Values.livenessProbe.initialDelaySeconds }}
            periodSeconds: {{ .Values.livenessProbe.periodSeconds }}
            timeoutSeconds: {{ .Values.livenessProbe.timeoutSeconds }}
            {{- end }}
      volumes:
        - name: keydb-conf
          configMap:
            name: {{ include "keydb-custom.fullname" . }}-conf
  volumeClaimTemplates:
    - metadata:
        name: data
      spec:
        accessModes: {{ toYaml .Values.persistence.accessModes | nindent 8 }}
        resources:
          requests:
            storage: {{ .Values.persistence.size }}
        storageClassName: "{{ .Values.persistence.storageClass }}"