# Pin Scylla (and optionally shard RocksDB cache) to dedicated nodes.
#
# This is the "storage covered by node selection" pattern: the chart
# itself stays provider-agnostic, but the operator picks which nodes
# are allowed to run the data plane. Useful when the cluster has a
# mix of hardware — e.g. general-purpose nodes for everything, plus a
# smaller pool of NVMe/local-SSD nodes reserved for databases.
#
# Assumptions about the cluster:
#   - A nodepool exists whose nodes carry the label
#       workload=storage
#     and the taint
#       workload=storage:NoSchedule
#   - A StorageClass backed by the local SSDs of that nodepool is
#     available (examples: `local-ssd-resource-adapter` on GKE, `gp3`
#     on EKS, `local-path` on Rancher/bare-metal). Replace
#     `storageClassName` below with yours.
#   - scylla-operator is installed (either via
#     `scripts/install-prereqs.sh` or an external add-on).
#
# This file is consumed by the `linera-validator-stack` umbrella:
#   helm install validator oci://ghcr.io/linera-io/charts/linera-validator-stack \
#     -f dedicated-storage-nodes.yaml -f my-identity.yaml

linera-validator:
  # Validator pods DO NOT need to be on the storage nodepool. Keep
  # them free to schedule wherever there's CPU + memory.
  # If you DO want the shard RocksDB cache on the same local SSDs
  # as Scylla, uncomment the nodeSelector + tolerations below AND
  # set `storage.rocksdbStorageClass` to the fast class. Not
  # strictly necessary — RocksDB is a read cache, latency matters
  # less than Scylla's primary write path.
  shards: {}
  # shards:
  #   nodeSelector:
  #     workload: storage
  #   tolerations:
  #     - key: workload
  #       operator: Equal
  #       value: storage
  #       effect: NoSchedule

  storage:
    uri: "scylladb:tcp:scylla-client.scylla.svc.cluster.local:9042"
    # rocksdbStorageClass: "your-fast-ssd-storageclass"
    # rocksdbSize: 100Gi

scylla:
  enabled: true
  datacenter: validator

  rack:
    name: rack
    members: 3
    storage:
      capacity: 500Gi
      # Fast local SSD StorageClass for ScyllaDB's primary data path.
      # See `helm show values oci://ghcr.io/linera-io/charts/linera-validator-stack`
      # for a full list of provider suggestions. Replace below with
      # the one your cluster exposes.
      storageClassName: "local-ssd-resource-adapter"
    resources:
      requests:
        cpu: "7"
        memory: 51Gi
      limits:
        cpu: "7"
        memory: 51Gi
    placement:
      # Required: only schedule on the storage nodepool.
      nodeAffinity:
        requiredDuringSchedulingIgnoredDuringExecution:
          nodeSelectorTerms:
            - matchExpressions:
                - key: workload
                  operator: In
                  values:
                    - storage
      # Required: tolerate the NoSchedule taint.
      tolerations:
        - key: workload
          operator: Equal
          value: storage
          effect: NoSchedule