sleet 0.1.0

A fleet manager for SlateDB databases
Documentation 
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{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "sleet heartbeat",
  "description": "The body of a heartbeat object.",
  "type": "object",
  "properties": {
    "node_id": {
      "description": "The node that wrote this heartbeat. Duplicates the object key so\nbodies are self-describing.",
      "type": "string"
    },
    "services": {
      "description": "Aggregate task states per offered service, across every database\nthe node owns.",
      "type": "array",
      "items": {
        "$ref": "#/$defs/ServiceSummary"
      }
    },
    "slatedb_version": {
      "description": "The slatedb version the node runs.",
      "type": "string"
    },
    "sleet_version": {
      "description": "The sleet version the node runs.",
      "type": "string"
    },
    "version": {
      "description": "Heartbeat format version; bumped only on incompatible change.",
      "type": "integer",
      "format": "uint32",
      "minimum": 0
    }
  },
  "required": [
    "version",
    "node_id",
    "sleet_version",
    "slatedb_version",
    "services"
  ],
  "$defs": {
    "Service": {
      "description": "A per-database service.",
      "oneOf": [
        {
          "description": "Garbage collection.",
          "type": "string",
          "const": "gc"
        },
        {
          "description": "Standalone compaction coordinator (RFC-0025).",
          "type": "string",
          "const": "compactor-coordinator"
        },
        {
          "description": "Compaction workers (RFC-0025).",
          "type": "string",
          "const": "compaction-workers"
        },
        {
          "description": "Mirroring to per-database targets (RFC 0002).",
          "type": "string",
          "const": "mirror"
        }
      ]
    },
    "ServiceSummary": {
      "description": "Aggregate task states for one offered service. Only counts are\nreported, because a node may own tasks for many thousands of\ndatabases.",
      "type": "object",
      "properties": {
        "backoff": {
          "description": "Owned tasks that crashed and are waiting out a restart delay.",
          "type": "integer",
          "format": "uint64",
          "minimum": 0
        },
        "running": {
          "description": "Owned tasks currently running.",
          "type": "integer",
          "format": "uint64",
          "minimum": 0
        },
        "service": {
          "description": "The offered service these counts cover.",
          "$ref": "#/$defs/Service"
        }
      },
      "required": [
        "service",
        "running",
        "backoff"
      ]
    }
  }
}