request_host_limiter #

Description #

The request_host_limiter filter is used to control traffic based on the request host (domain name).

Configuration Example #

A configuration example is as follows:

flow:
  - name: rate_limit_flow
    filter:
      - request_host_limiter:
          host:
            - api.elasticsearch.cn:8000
            - logging.elasticsearch.cn:8000
          max_requests: 256
#          max_bytes: 102400 #100k
          action: retry # retry or drop
#          max_retry_times: 1000
#          retry_interval: 500 #100ms
          message: "you reached our limit"

The above configuration controls the traffic used for accessing domain names api.elasticsearch.cn and logging.elasticsearch.cn and the maximum allowable QPS is 256 per second.

Parameter Description #

Name	Type	Description
host	array	Host domain names that will participate in traffic control. If this parameter is not set, all host domain names will participate in traffic control. If an accessed domain name contains a port ID, add the port ID here. For example, `localhost:8080`.
interval	string	Interval for evaluating whether traffic control conditions are met. The default value is `1s`.
max_requests	int	Maximum request count limit in the interval
burst_requests	int	Burst request count limit in the interval
max_bytes	int	Maximum request traffic limit in the interval
burst_bytes	int	Burst request traffic limit in the interval
action	string	Processing action after traffic control is triggered. The value can be set as `retry` or `drop` and the default value is `retry`.
status	string	Status code returned after traffic control conditions are met. The default value is `429`.
message	string	Rejection message returned for a request, for which traffic control conditions are met
retry_delay_in_ms	int	Interval for traffic control retry, in milliseconds. The default value is `10`.
max_retry_times	int	Maximum retry count in the case of traffic control retries. The default value is `1000`.
failed_retry_message	string	Rejection message returned for a request, for which the maximum retry count has been reached
log_warn_message	bool	Whether to log warn message