---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: {{ template "elasticsearch.uname" . }}
  labels:
    heritage: {{ .Release.Service | quote }}
    release: {{ .Release.Name | quote }}
    chart: "{{ .Chart.Name }}"
    app: "{{ template "elasticsearch.uname" . }}"
    {{- range $key, $value := .Values.labels }}
    {{ $key }}: {{ $value | quote }}
    {{- end }}
  annotations:
    esMajorVersion: "{{ include "elasticsearch.esMajorVersion" . }}"
spec:
  serviceName: {{ template "elasticsearch.uname" . }}-headless
  selector:
    matchLabels:
      app: "{{ template "elasticsearch.uname" . }}"
  replicas: {{ .Values.replicas }}
  podManagementPolicy: {{ .Values.podManagementPolicy }}
  updateStrategy:
    type: {{ .Values.updateStrategy }}
  {{- if .Values.persistence.enabled }}
  volumeClaimTemplates:
  - metadata:
      name: {{ template "elasticsearch.uname" . }}
    {{- if .Values.persistence.labels.enabled }}
      labels:
        release: {{ .Release.Name | quote }}
        chart: "{{ .Chart.Name }}"
        app: "{{ template "elasticsearch.uname" . }}"
        {{- range $key, $value := .Values.labels }}
        {{ $key }}: {{ $value | quote }}
        {{- end }}
    {{- end }}
    {{- with .Values.persistence.annotations  }}
      annotations:
{{ toYaml . | indent 8 }}
    {{- end }}
    spec:
{{ toYaml .Values.volumeClaimTemplate | indent 6 }}
  {{- end }}
  template:
    metadata:
      name: "{{ template "elasticsearch.uname" . }}"
      labels:
        release: {{ .Release.Name | quote }}
        chart: "{{ .Chart.Name }}"
        app: "{{ template "elasticsearch.uname" . }}"
        {{- range $key, $value := .Values.labels }}
        {{ $key }}: {{ $value | quote }}
        {{- end }}
      annotations:
        {{- range $key, $value := .Values.podAnnotations }}
        {{ $key }}: {{ $value | quote }}
        {{- end }}
        {{/* This forces a restart if the configmap has changed */}}
        {{- if .Values.esConfig }}
        configchecksum: {{ include (print .Template.BasePath "/configmap.yaml") . | sha256sum | trunc 63 }}
        {{- end }}
    spec:
      {{- if .Values.schedulerName }}
      schedulerName: "{{ .Values.schedulerName }}"
      {{- end }}
      securityContext:
{{ toYaml .Values.podSecurityContext | indent 8 }}
        {{- if .Values.fsGroup }}
        fsGroup: {{ .Values.fsGroup }} # Deprecated value, please use .Values.podSecurityContext.fsGroup
        {{- end }}
      {{- if .Values.rbac.create }}
      serviceAccountName: "{{ template "elasticsearch.uname" . }}"
      {{- else if not (eq .Values.rbac.serviceAccountName "") }}
      serviceAccountName: {{ .Values.rbac.serviceAccountName | quote }}
      {{- end }}
      {{- with .Values.tolerations }}
      tolerations:
{{ toYaml . | indent 6 }}
      {{- end }}
      {{- with .Values.nodeSelector }}
      nodeSelector:
{{ toYaml . | indent 8 }}
      {{- end }}
      {{- if or (eq .Values.antiAffinity "hard") (eq .Values.antiAffinity "soft") .Values.nodeAffinity }}
      {{- if .Values.priorityClassName }}
      priorityClassName: {{ .Values.priorityClassName }}
      {{- end }}
      affinity:
      {{- end }}
      {{- if eq .Values.antiAffinity "hard" }}
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
          - labelSelector:
              matchExpressions:
              - key: app
                operator: In
                values:
                - "{{ template "elasticsearch.uname" .}}"
            topologyKey: {{ .Values.antiAffinityTopologyKey }}
      {{- else if eq .Values.antiAffinity "soft" }}
        podAntiAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
          - weight: 1
            podAffinityTerm:
              topologyKey: {{ .Values.antiAffinityTopologyKey }}
              labelSelector:
                matchExpressions:
                - key: app
                  operator: In
                  values:
                  - "{{ template "elasticsearch.uname" . }}"
      {{- end }}
      {{- with .Values.nodeAffinity }}
        nodeAffinity:
{{ toYaml . | indent 10 }}
      {{- end }}
      terminationGracePeriodSeconds: {{ .Values.terminationGracePeriod }}
      volumes:
        {{- range .Values.secretMounts }}
        - name: {{ .name }}
          secret:
            secretName: {{ .secretName }}
            {{- if .defaultMode }}
            defaultMode: {{ .defaultMode }}
            {{- end }}
        {{- end }}
        {{- if .Values.esConfig }}
        - name: esconfig
          configMap:
            name: {{ template "elasticsearch.uname" . }}-config
        {{- end }}
{{- if .Values.keystore }}
        - name: keystore
          emptyDir: {}
        {{- range .Values.keystore }}
        - name: keystore-{{ .secretName }}
          secret: {{ toYaml . | nindent 12 }}
        {{- end }}
{{ end }}
      {{- if .Values.extraVolumes }}
      # Currently some extra blocks accept strings
      # to continue with backwards compatibility this is being kept
      # whilst also allowing for yaml to be specified too.
      {{- if eq "string" (printf "%T" .Values.extraVolumes) }}
{{ tpl .Values.extraVolumes . | indent 8 }}
      {{- else }}
{{ toYaml .Values.extraVolumes | indent 8 }}
      {{- end }}
      {{- end }}
      {{- if .Values.imagePullSecrets }}
      imagePullSecrets:
{{ toYaml .Values.imagePullSecrets | indent 8 }}
      {{- end }}
      enableServiceLinks: {{ .Values.enableServiceLinks }}
      {{- if .Values.hostAliases }}
      hostAliases: {{ toYaml .Values.hostAliases | nindent 8 }}
      {{- end }}
      {{- if or (.Values.extraInitContainers) (.Values.sysctlInitContainer.enabled) (.Values.keystore)  }}
      initContainers:
      {{- if .Values.sysctlInitContainer.enabled }}
      - name: configure-sysctl
        securityContext:
          runAsUser: 0
          privileged: true
        image: "{{ .Values.image }}:{{ .Values.imageTag }}"
        imagePullPolicy: "{{ .Values.imagePullPolicy }}"
        command: ["sysctl", "-w", "vm.max_map_count={{ .Values.sysctlVmMaxMapCount}}"]
        resources:
{{ toYaml .Values.initResources | indent 10 }}
      {{- end }}
{{ if .Values.keystore }}
      - name: keystore
        image: "{{ .Values.image }}:{{ .Values.imageTag }}"
        imagePullPolicy: "{{ .Values.imagePullPolicy }}"
        command:
        - sh
        - -c
        - |
          #!/usr/bin/env bash
          set -euo pipefail

          elasticsearch-keystore create

          for i in /tmp/keystoreSecrets/*/*; do
            key=$(basename $i)
            echo "Adding file $i to keystore key $key"
            elasticsearch-keystore add-file "$key" "$i"
          done

          # Add the bootstrap password since otherwise the Elasticsearch entrypoint tries to do this on startup
          if [ ! -z ${ELASTIC_PASSWORD+x} ]; then
            echo 'Adding env $ELASTIC_PASSWORD to keystore as key bootstrap.password'
            echo "$ELASTIC_PASSWORD" | elasticsearch-keystore add -x bootstrap.password
          fi

          cp -a /usr/share/elasticsearch/config/elasticsearch.keystore /tmp/keystore/
        env: {{ toYaml .Values.extraEnvs | nindent 10 }}
        envFrom: {{ toYaml .Values.envFrom | nindent 10 }}
        resources: {{ toYaml .Values.initResources | nindent 10 }}
        volumeMounts:
          - name: keystore
            mountPath: /tmp/keystore
          {{- range .Values.keystore }}
          - name: keystore-{{ .secretName }}
            mountPath: /tmp/keystoreSecrets/{{ .secretName }}
          {{- end }}
{{ end }}
      {{- if .Values.extraInitContainers }}
      # Currently some extra blocks accept strings
      # to continue with backwards compatibility this is being kept
      # whilst also allowing for yaml to be specified too.
      {{- if eq "string" (printf "%T" .Values.extraInitContainers) }}
{{ tpl .Values.extraInitContainers . | indent 6 }}
      {{- else }}
{{ toYaml .Values.extraInitContainers | indent 6 }}
      {{- end }}
      {{- end }}
      {{- end }}
      containers:
      - name: "{{ template "elasticsearch.name" . }}"
        securityContext:
{{ toYaml .Values.securityContext | indent 10 }}
        image: "{{ .Values.image }}:{{ .Values.imageTag }}"
        imagePullPolicy: "{{ .Values.imagePullPolicy }}"
        readinessProbe:
          exec:
            command:
              - sh
              - -c
              - |
                #!/usr/bin/env bash -e
                # If the node is starting up wait for the cluster to be ready (request params: "{{ .Values.clusterHealthCheckParams }}" )
                # Once it has started only check that the node itself is responding
                START_FILE=/tmp/.es_start_file

                # Disable nss cache to avoid filling dentry cache when calling curl
                # This is required with Elasticsearch Docker using nss < 3.52
                export NSS_SDB_USE_CACHE=no

                http () {
                  local path="${1}"
                  local args="${2}"
                  set -- -XGET -s

                  if [ "$args" != "" ]; then
                    set -- "$@" $args
                  fi

                  if [ -n "${ELASTIC_USERNAME}" ] && [ -n "${ELASTIC_PASSWORD}" ]; then
                    set -- "$@" -u "${ELASTIC_USERNAME}:${ELASTIC_PASSWORD}"
                  fi

                  curl --output /dev/null -k "$@" "{{ .Values.protocol }}://127.0.0.1:{{ .Values.httpPort }}${path}"
                }

                if [ -f "${START_FILE}" ]; then
                  echo 'Elasticsearch is already running, lets check the node is healthy'
                  HTTP_CODE=$(http "/" "-w %{http_code}")
                  RC=$?
                  if [[ ${RC} -ne 0 ]]; then
                    echo "curl --output /dev/null -k -XGET -s -w '%{http_code}' \${BASIC_AUTH} {{ .Values.protocol }}://127.0.0.1:{{ .Values.httpPort }}/ failed with RC ${RC}"
                    exit ${RC}
                  fi
                  # ready if HTTP code 200, 503 is tolerable if ES version is 6.x
                  if [[ ${HTTP_CODE} == "200" ]]; then
                    exit 0
                  elif [[ ${HTTP_CODE} == "503" && "{{ include "elasticsearch.esMajorVersion" . }}" == "6" ]]; then
                    exit 0
                  else
                    echo "curl --output /dev/null -k -XGET -s -w '%{http_code}' \${BASIC_AUTH} {{ .Values.protocol }}://127.0.0.1:{{ .Values.httpPort }}/ failed with HTTP code ${HTTP_CODE}"
                    exit 1
                  fi

                else
                  echo 'Waiting for elasticsearch cluster to become ready (request params: "{{ .Values.clusterHealthCheckParams }}" )'
                  if http "/_cluster/health?{{ .Values.clusterHealthCheckParams }}" "--fail" ; then
                    touch ${START_FILE}
                    exit 0
                  else
                    echo 'Cluster is not yet ready (request params: "{{ .Values.clusterHealthCheckParams }}" )'
                    exit 1
                  fi
                fi
{{ toYaml .Values.readinessProbe | indent 10 }}
        ports:
        - name: http
          containerPort: {{ .Values.httpPort }}
        - name: transport
          containerPort: {{ .Values.transportPort }}
        resources:
{{ toYaml .Values.resources | indent 10 }}
        env:
          - name: node.name
            valueFrom:
              fieldRef:
                fieldPath: metadata.name
          {{- if eq .Values.roles.master "true" }}
          {{- if ge (int (include "elasticsearch.esMajorVersion" .)) 7 }}
          - name: cluster.initial_master_nodes
            value: "{{ template "elasticsearch.endpoints" . }}"
          {{- else }}
          - name: discovery.zen.minimum_master_nodes
            value: "{{ .Values.minimumMasterNodes }}"
          {{- end }}
          {{- end }}
          {{- if lt (int (include "elasticsearch.esMajorVersion" .)) 7 }}
          - name: discovery.zen.ping.unicast.hosts
            value: "{{ template "elasticsearch.masterService" . }}-headless"
          {{- else }}
          - name: discovery.seed_hosts
            value: "{{ template "elasticsearch.masterService" . }}-headless"
          {{- end }}
          - name: cluster.name
            value: "{{ .Values.clusterName }}"
          - name: network.host
            value: "{{ .Values.networkHost }}"
          - name: ES_JAVA_OPTS
            value: "{{ .Values.esJavaOpts }}"
          {{- range $role, $enabled := .Values.roles }}
          - name: node.{{ $role }}
            value: "{{ $enabled }}"
          {{- end }}
{{- if .Values.extraEnvs }}
{{ toYaml .Values.extraEnvs | indent 10 }}
{{- end }}
{{- if .Values.envFrom }}
        envFrom:
{{ toYaml .Values.envFrom | indent 10 }}
{{- end }}
        volumeMounts:
          {{- if .Values.persistence.enabled }}
          - name: "{{ template "elasticsearch.uname" . }}"
            mountPath: /usr/share/elasticsearch/data
          {{- end }}
{{ if .Values.keystore }}
          - name: keystore
            mountPath: /usr/share/elasticsearch/config/elasticsearch.keystore
            subPath: elasticsearch.keystore
{{ end }}
          {{- range .Values.secretMounts }}
          - name: {{ .name }}
            mountPath: {{ .path }}
            {{- if .subPath }}
            subPath: {{ .subPath }}
            {{- end }}
          {{- end }}
          {{- range $path, $config := .Values.esConfig }}
          - name: esconfig
            mountPath: /usr/share/elasticsearch/config/{{ $path }}
            subPath: {{ $path }}
          {{- end -}}
        {{- if .Values.extraVolumeMounts }}
        # Currently some extra blocks accept strings
        # to continue with backwards compatibility this is being kept
        # whilst also allowing for yaml to be specified too.
        {{- if eq "string" (printf "%T" .Values.extraVolumeMounts) }}
{{ tpl .Values.extraVolumeMounts . | indent 10 }}
        {{- else }}
{{ toYaml .Values.extraVolumeMounts | indent 10 }}
        {{- end }}
        {{- end }}
      {{- if .Values.masterTerminationFix }}
      {{- if eq .Values.roles.master "true" }}
      # This sidecar will prevent slow master re-election
      # https://github.com/elastic/helm-charts/issues/63
      - name: elasticsearch-master-graceful-termination-handler
        image: "{{ .Values.image }}:{{ .Values.imageTag }}"
        imagePullPolicy: "{{ .Values.imagePullPolicy }}"
        command:
        - "sh"
        - -c
        - |
          #!/usr/bin/env bash
          set -eo pipefail

          http () {
              local path="${1}"
              if [ -n "${ELASTIC_USERNAME}" ] && [ -n "${ELASTIC_PASSWORD}" ]; then
                BASIC_AUTH="-u ${ELASTIC_USERNAME}:${ELASTIC_PASSWORD}"
              else
                BASIC_AUTH=''
              fi
              curl -XGET -s -k --fail ${BASIC_AUTH} {{ .Values.protocol }}://{{ template "elasticsearch.masterService" . }}:{{ .Values.httpPort }}${path}
          }

          cleanup () {
            while true ; do
              local master="$(http "/_cat/master?h=node" || echo "")"
              if [[ $master == "{{ template "elasticsearch.masterService" . }}"* && $master != "${NODE_NAME}" ]]; then
                echo "This node is not master."
                break
              fi
              echo "This node is still master, waiting gracefully for it to step down"
              sleep 1
            done

            exit 0
          }

          trap cleanup SIGTERM

          sleep infinity &
          wait $!
        resources:
{{ toYaml .Values.sidecarResources | indent 10 }}
        env:
          - name: NODE_NAME
            valueFrom:
              fieldRef:
                fieldPath: metadata.name
        {{- if .Values.extraEnvs }}
{{ toYaml .Values.extraEnvs | indent 10 }}
        {{- end }}
        {{- if .Values.envFrom }}
        envFrom:
{{ toYaml .Values.envFrom | indent 10 }}
        {{- end }}
      {{- end }}
      {{- end }}
{{- if .Values.lifecycle }}
        lifecycle:
{{ toYaml .Values.lifecycle | indent 10 }}
{{- end }}
      {{- if .Values.extraContainers }}
      # Currently some extra blocks accept strings
      # to continue with backwards compatibility this is being kept
      # whilst also allowing for yaml to be specified too.
      {{- if eq "string" (printf "%T" .Values.extraContainers) }}
{{ tpl .Values.extraContainers . | indent 6 }}
      {{- else }}
{{ toYaml .Values.extraContainers | indent 6 }}
      {{- end }}
      {{- end }}
