# https://kubernetes.io/docs/tutorials/stateful-application/basic-stateful-set/
# https://cloud.google.com/kubernetes-engine/docs/concepts/statefulset
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: polkadot
spec:
  selector:
    matchLabels:
      app: polkadot
  serviceName: polkadot
  replicas: {{ .Values.nodes.replicas }}
  updateStrategy:
    type: RollingUpdate
  podManagementPolicy: Parallel
  template:
    metadata:
      labels:
        app: polkadot
    spec:
      {{- if .Values.rbac.enable }}
      serviceAccountName: {{ .Values.rbac.name }}
      {{- else }}
      serviceAccountName: default
      {{- end }}
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
            - matchExpressions:
                - key: node
                  operator: In
                  values:
                  - polkadot
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchExpressions:
                  - key: "app"
                    operator: In
                    values:
                    - polkadot
              topologyKey: "kubernetes.io/hostname"
      terminationGracePeriodSeconds: 300
      containers:
      - name: polkapod
        imagePullPolicy: "{{ .Values.image.pullPolicy }}"
        image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
        {{- if .Values.resources }}
        resources:
          requests:
            memory: {{ .Values.resources.memory }}
            cpu: {{ .Values.resources.cpu }}
        {{- end }}
        ports:
        - containerPort: 30333
          name: p2p
        - containerPort: 9933
          name: http-rpc
        - containerPort: 9944
          name: websocket-rpc
        args:
          - --base-path
          - {{ .Values.image.basepath }}
          - --name
          - $(MY_POD_NAME)
        {{- range .Values.nodes.args }}
          - {{ . }}
        {{- end }}
        env:
          # from (workaround for hostname)
          # https://kubernetes.io/docs/tasks/inject-data-application/environment-variable-expose-pod-information/
          - name: MY_POD_NAME
            valueFrom:
              fieldRef:
                fieldPath: metadata.name
        volumeMounts:
        - name: polkadir
          mountPath: {{ .Values.image.basepath }}
        readinessProbe:
          tcpSocket:
            port: http-rpc
          initialDelaySeconds: 30
          periodSeconds: 30
        livenessProbe:
          tcpSocket:
            port: http-rpc
          initialDelaySeconds: 30
          periodSeconds: 30
      securityContext:
        runAsUser: 1000
        fsGroup: 1000
  volumeClaimTemplates:
  - metadata:
      name: polkadir
    spec:
      accessModes: [ "ReadWriteOnce" ]
      storageClassName: ssd
      resources:
        requests:
          storage: 32Gi