spec.json

{
    "version": 1.0,
    "url": "https://www.elastic.co/guide/en/ecs/current/index.html",
    "ecs": {
        "version": "1.x"
    },
    "fields": {
        "@timestamp": {
            "type": "datetime",
            "required": true,
            "index": 0,
            "url": "https://www.elastic.co/guide/en/ecs/current/ecs-base.html",
            "comment": [
                "Field order, as specified by 'index', is RECOMMENDED.",
                "ECS loggers must implement field order unless the logging framework makes that impossible."
            ]
        },
        "log.level": {
            "type": "string",
            "required": true,
            "index": 1,
            "top_level_field": true,
            "url": "https://www.elastic.co/guide/en/ecs/current/ecs-log.html",
            "comment": [
                "This field SHOULD NOT be a nested object field but at the top level with a dot in the property name.",
                "This is to make the JSON logs more human-readable.",
                "Loggers MAY indent the log level so that the `message` field always starts at the exact same offset,",
                "no matter the number of characters the log level has.",
                "For example: `'DEBUG'` (5 chars) will not be indented, whereas ` 'WARN'` (4 chars) will be indented by one space character."
            ]
        },
        "message": {
            "type": "string",
            "required": false,
            "index": 2,
            "url": "https://www.elastic.co/guide/en/ecs/current/ecs-base.html",
            "comment": [
                "A message field is typically included in all log records, but some logging libraries allow records with no message.",
                "That's typically the case for libraries that allow for structured logging."
            ]
        },
        "ecs.version": {
            "type": "string",
            "required": true,
            "url": "https://www.elastic.co/guide/en/ecs/current/ecs-ecs.html"
        },
        "labels": {
            "type": "object",
            "required": false,
            "url": "https://www.elastic.co/guide/en/ecs/current/ecs-base.html",
            "sanitization": {
                "key": {
                    "replacements": [".", "*", "\\"],
                    "substitute": "_"
                }
            }
        },
        "trace.id": {
            "type": "string",
            "required": false,
            "url": "https://www.elastic.co/guide/en/ecs/current/ecs-tracing.html",
            "comment": "When APM agents add this field to the context, ecs loggers should pick it up and add it to the log event."
        },
        "transaction.id": {
            "type": "string",
            "required": false,
            "url": "https://www.elastic.co/guide/en/ecs/current/ecs-tracing.html",
            "comment": "When APM agents add this field to the context, ecs loggers should pick it up and add it to the log event."
        },
        "service.name": {
            "type": "string",
            "required": false,
            "url": "https://www.elastic.co/guide/en/ecs/current/ecs-service.html",
            "comment": [
                "Configurable by users.",
                "When an APM agent is active, it should auto-configure this field if not already set."
            ]
        },
        "service.node.name": {
            "type": "string",
            "required": false,
            "url": "https://www.elastic.co/guide/en/ecs/current/ecs-service.html",
            "comment": [
                "Configurable by users.",
                "When an APM agent is active and `service_node_name` is manually configured, the agent should auto-configure this field if not already set."
            ]
        },
        "event.dataset": {
            "type": "string",
            "required": false,
            "url": "https://www.elastic.co/guide/en/ecs/current/ecs-event.html",
            "default": "${service.name}.log OR ${service.name}.${appender.name}",
            "comment": [
                "Configurable by users.",
                "If the user manually configures the service name,",
                "the logging library should set `event.dataset=${service.name}.log` if not explicitly configured otherwise.",
                "",
                "When agents auto-configure the app to use an ECS logger,",
                "they should set `event.dataset=${service.name}.${appender.name}` if the appender name is available in the logging library.",
                "Otherwise, agents should also set `event.dataset=${service.name}.log`",
                "",
                "The field helps to filter for different log streams from the same pod, for example and is required for log anomaly detection."
            ]
        },
        "process.thread.name": {
            "type": "string",
            "required": false,
            "url": "https://www.elastic.co/guide/en/ecs/current/ecs-process.html"
        },
        "log.logger": {
            "type": "string",
            "required": false,
            "url": "https://www.elastic.co/guide/en/ecs/current/ecs-log.html"
        },
        "log.origin.file.line": {
            "type": "integer",
            "required": false,
            "url": "https://www.elastic.co/guide/en/ecs/current/ecs-log.html",
            "comment": "Should be opt-in as it requires the logging library to capture a stack trace for each log event."
        },
        "log.origin.file.name": {
            "type": "string",
            "required": false,
            "url": "https://www.elastic.co/guide/en/ecs/current/ecs-log.html",
            "comment": "Should be opt-in as it requires the logging library to capture a stack trace for each log event."
        },
        "log.origin.function": {
            "type": "string",
            "required": false,
            "url": "https://www.elastic.co/guide/en/ecs/current/ecs-log.html",
            "comment": "Should be opt-in as it requires the logging library to capture a stack trace for each log event."
        },
        "error.type": {
            "type": "string",
            "required": false,
            "url": "https://www.elastic.co/guide/en/ecs/current/ecs-error.html",
            "comment": "The exception type or class, such as `java.lang.IllegalArgumentException`."
        },
        "error.message": {
            "type": "string",
            "required": false,
            "url": "https://www.elastic.co/guide/en/ecs/current/ecs-error.html",
            "comment": "The message of the exception."
        },
        "error.stack_trace": {
            "type": "string",
            "required": false,
            "url": "https://www.elastic.co/guide/en/ecs/current/ecs-error.html",
            "comment": "The stack trace of the exception as plain text."
        }
    }
}