[rate-limiting plugin] How can we add multiple limit_by conditions for the same entity?

[TVenuMadhav]

The rate limit plugin documentation isn't very clear in suggesting if it is possible to have multiple limit_by conditions configured for the rate limiting plugin.

Example:

Let's say that I want to rate limit incoming requests to service with x / min (by ip) and y/ min (by header). To do this, should we configure two separate rate limiting plugins for each different conditions for the service like for example:

 - name: rate-limiting
    config:
      day: null
      fault_tolerant: true
      hide_client_headers: false
      hour: null
      limit_by: header
      header_name: X-Consumer-Account-ID
      second: null
      minute: 30
      month: null
      policy: local
      redis_database: 0
      redis_host: null
      redis_password: null
      redis_port: 6379
      redis_timeout: 2000
      year: null
    enabled: true
    protocols:
    - grpc
    - grpcs
    - http
    - https
- name: rate-limiting
    config:
      day: null
      fault_tolerant: true
      hide_client_headers: false
      hour: null
      limit_by: ip
      second: null
      minute: 80
      month: null
      policy: local
      redis_database: 0
      redis_host: null
      redis_password: null
      redis_port: 6379
      redis_timeout: 2000
      year: null
    enabled: true
    protocols:
    - grpc
    - grpcs
    - http
    - https

I know that this gives entity exists error while performing deck validate . How can we get the intended functionality?

[kikito]

There is only one config value admitted per plugin, and each of the fields of the rate-limiting plugin admit only one value (second must be an integer, minute must be an integer, and so on).

The message Multiple limits can be configured means that it is possible to simultaneously use (for example) the minute and the second field. In your case, given that you wanted it to happen every 30 and 80 minutes, you could do this:

- name: rate-limiting
    config:
      day: null
      fault_tolerant: true
      hide_client_headers: false
      hour: null
      limit_by: ip
      second: 1800
      minute: 80
      month: null
      policy: local
      redis_database: 0
      redis_host: null
      redis_password: null
      redis_port: 6379
      redis_timeout: 2000
      year: null
    enabled: true
    protocols:
    - grpc
    - grpcs
    - http
    - https