# Elasticsearch for observability: logs, traces (via APM), hot/warm tiers.
# Stack monitoring: metrics + logs ship to eck-observability-monitoring-prd (ECK-managed ref).
# Topology: 3× (master + data_hot + ingest), 2× (data_warm + ingest), 6g heap, 500Gi disk per node.
# Tolerations: align with your GKE node pool taint (key/value below).
# ILM: configure index templates to route hot → warm (data_hot / data_warm) in Kibana / API.
# SSO: Google login is handled at nginx + oauth2-proxy (ingress), not Elasticsearch OIDC (Platinum).
apiVersion: elasticsearch.k8s.elastic.co/v1
kind: Elasticsearch
metadata:
  name: eck-observability-prd
  namespace: eck-observability-prd
spec:
  version: 9.3.1
  monitoring:
    metrics:
      elasticsearchRefs:
        - name: eck-observability-monitoring-prd
          namespace: eck-observability-prd
    logs:
      elasticsearchRefs:
        - name: eck-observability-monitoring-prd
          namespace: eck-observability-prd
  nodeSets:
    # 3 nodes: master-eligible + data_hot + ingest (schedule on tainted pool)
    - name: hot
      count: 9
      config:
        node.roles: ["data_hot", "ingest", "data_content", "transform"]
      volumeClaimTemplates:
      - metadata:
          name: elasticsearch-data
        spec:
          storageClassName: gke-hyperdisk-balanced-35k
          accessModes:
          - ReadWriteOnce
          resources:
            requests:
              storage: 4Ti
      podTemplate:
        metadata:
          labels:
            elasticsearch.k8s.elastic.co/service-account: eck-observability-es-sa-prd
            elasticsearch.k8s.elastic.co/nodeset: hot
            elasticsearch.k8s.elastic.co/tier: hot-warm-data
            elasticsearch.k8s.elastic.co/tier22: hot-warm-data-22
          annotations:
            cluster-autoscaler.kubernetes.io/safe-to-evict: "false"
        spec:
          serviceAccountName: eck-observability-es-sa-prd
          # Tolerations for dedicated ES node pool (edit key/value to match your taint)
          tolerations:
          - effect: NoSchedule
            key: elastic-observability-hot-nodes
            operator: Equal
            value: "true"
          nodeSelector:
            elastic-observability-hot-nodes: "true"
          initContainers:
          - name: sysctl
            securityContext:
              privileged: true
              runAsUser: 0
            command: ['sh', '-c', 'sysctl -w vm.max_map_count=262144']
          containers:
            - name: elasticsearch
              env:
              - name: ES_JAVA_OPTS
                value: "-Xms31g -Xmx31g"
              resources:
                requests:
                  memory: 110Gi
                  cpu: "26"
                limits:
                  memory: 110Gi
                  cpu: "28"

    # 2 nodes: data_warm + ingest (schedule on tainted pool)
    - name: warm
      count: 6
      config:
        node.roles: ["data_warm", "ingest", "data_content"]
      volumeClaimTemplates:
      - metadata:
          name: elasticsearch-data
        spec:
          storageClassName: gke-hyperdisk-ssd
          accessModes:
          - ReadWriteOnce
          resources:
            requests:
              storage: 6.5Ti
      podTemplate:
        metadata:
          labels:
            elasticsearch.k8s.elastic.co/service-account: eck-observability-es-sa-prd
            elasticsearch.k8s.elastic.co/nodeset: warm
            elasticsearch.k8s.elastic.co/tier: hot-warm-data
          annotations:
            cluster-autoscaler.kubernetes.io/safe-to-evict: "false"
        spec:
          serviceAccountName: eck-observability-es-sa-prd
          tolerations:
          - effect: NoSchedule
            key: elastic-observability-warm-nodes
            operator: Equal
            value: "true"
          nodeSelector:
            elastic-observability-warm-nodes: "true"
          initContainers:
          - name: sysctl
            securityContext:
              privileged: true
              runAsUser: 0
            command: ['sh', '-c', 'sysctl -w vm.max_map_count=262144']
          containers:
            - name: elasticsearch
              env:
              - name: ES_JAVA_OPTS
                value: "-Xms31g -Xmx31g"
              resources:
                requests:
                  memory: 107Gi
                  cpu: "24"
                limits:
                  memory: 107Gi
                  cpu: "26"

    # 3 nodes: master-only (dedicated cluster state management)
    - name: master
      count: 3
      config:
        node.roles: ["master"]
      volumeClaimTemplates:
      - metadata:
          name: elasticsearch-data
        spec:
          storageClassName: gke-hyperdisk-ssd
          accessModes:
          - ReadWriteOnce
          resources:
            requests:
              storage: 200Gi
      podTemplate:
        metadata:
          labels:
            elasticsearch.k8s.elastic.co/service-account: eck-observability-es-sa-prd
            elasticsearch.k8s.elastic.co/nodeset: master
          annotations:
            cluster-autoscaler.kubernetes.io/safe-to-evict: "false"
        spec:
          serviceAccountName: eck-observability-es-sa-prd
          tolerations:
          - effect: NoSchedule
            key: elastic-observability-master-nodes
            operator: Equal
            value: "true"
          nodeSelector:
            elastic-observability-master-nodes: "true"
          initContainers:
          - name: sysctl
            securityContext:
              privileged: true
              runAsUser: 0
            command: ['sh', '-c', 'sysctl -w vm.max_map_count=262144']
          containers:
            - name: elasticsearch
              env:
              - name: ES_JAVA_OPTS
                value: "-Xms5g -Xmx5g"
              resources:
                requests:
                  memory: 10Gi
                  cpu: "5"
                limits:
                  memory: 10Gi
                  cpu: "6"

  http:
    tls:
      selfSignedCertificate:
        disabled: true