Version: 3.3

request-id

Description#

The request-id Plugin adds a unique ID to each request proxied through APISIX.

This Plugin can be used to track API requests.

note

The Plugin will not add a unique ID if the request already has a header with the configured header_name.

Attributes#

Name	Type	Required	Default	Valid values	Description
header_name	string	False	"X-Request-Id"		Header name for the unique request ID.
include_in_response	boolean	False	true		When set to `true`, adds the unique request ID in the response header.
algorithm	string	False	"uuid"	["uuid", "snowflake", "nanoid", "range_id"]	Algorithm to use for generating the unique request ID.
range_id.char_set	string	False	"abcdefghijklmnopqrstuvwxyzABCDEFGHIGKLMNOPQRSTUVWXYZ0123456789	The minimum string length is 6	Character set for range_id
range_id.length	integer	False	16	Minimum 6	Id length for range_id algorithm

Using snowflake algorithm to generate unique ID#

caution

When you need to use snowflake algorithm, make sure APISIX has the permission to write to the etcd.
Please read this documentation before deciding to use the snowflake algorithm. Once it is configured, you cannot arbitrarily change the configuration. Failure to do so may result in duplicate IDs.

The snowflake algorithm supports flexible configurations to cover a variety of needs. Attributes are as follows:

Name	Type	Required	Default	Description
enable	boolean	False	false	When set to `true`, enables the snowflake algorithm.
snowflake_epoc	integer	False	1609459200000	Starting timestamp in milliseconds. Default is `2021-01-01T00:00:00Z` and supports to a 69 year time until `2090-09-0715:47:35Z`.
data_machine_bits	integer	False	12	Maximum number of supported machines (processes) `1 << data_machine_bits`. Corresponds the set of `workIDs` and `dataCenterIDs` in the snowflake definition. Each process is associated to a unique ID. The maximum number of supported processes is `pow(2, data_machine_bits)`. So, for the default value of 12 bits, it is 4096.
sequence_bits	integer	False	10	Maximum number of generated ID per millisecond per node `1 << sequence_bits`. Each process generates up to 1024 IDs per millisecond.
data_machine_ttl	integer	False	30	Valid time in seconds of registration of `data_machine` in etcd.
data_machine_interval	integer	False	10	Time in seconds between `data_machine` renewals in etcd.

To use the snowflake algorithm, you have to enable it first on your configuration file conf/config.yaml:

conf/config.yaml

plugin_attr:
  request-id:
    snowflake:
      enable: true
      snowflake_epoc: 1609459200000
      data_machine_bits: 12
      sequence_bits: 10
      data_machine_ttl: 30
      data_machine_interval: 10

Enabling the Plugin#

The example below enables the Plugin on a specific Route:

curl http://127.0.0.1:9180/apisix/admin/routes/5 \
-H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
    "uri": "/hello",
    "plugins": {
        "request-id": {
            "include_in_response": true
        }
    },
    "upstream": {
        "type": "roundrobin",
        "nodes": {
            "127.0.0.1:8080": 1
        }
    }
}'

Example usage#

Once you have configured the Plugin as shown above, APISIX will create a unique ID for each request you make:

curl -i http://127.0.0.1:9080/hello

HTTP/1.1 200 OK
X-Request-Id: fe32076a-d0a5-49a6-a361-6c244c1df956

Disable Plugin#

To disable the request-id Plugin, you can delete the corresponding JSON configuration from the Plugin configuration. APISIX will automatically reload and you do not have to restart for this to take effect.

curl http://127.0.0.1:9180/apisix/admin/routes/5 \
-H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
    "uri": "/get",
    "plugins": {
    },
    "upstream": {
        "type": "roundrobin",
        "nodes": {
            "127.0.0.1:8080": 1
        }
    }
}'