Summary

• Name
• Attributes
• Info
• How To Enable
• Test Plugin
• Disable Plugin

Name

kafka-logger is a plugin which works as a Kafka client driver for the ngx_lua nginx module.

This will provide the ability to send Log data requests as JSON objects to external Kafka clusters.

This plugin provides the ability to push Log data as a batch to you're external Kafka topics. In case if you did not receive the log data don't worry give it some time it will automatically send the logs after the timer function expires in our Batch Processor.

For more info on Batch-Processor in Apache APISIX please refer. Batch-Processor

Attributes

examples of meta_format

• default:

  {"upstream":"127.0.0.1:1980","start_time":1602211788041,"client_ip":"127.0.0.1","service_id":"","route_id":"1","request":{"querystring":{"ab":"cd"},"size":90,"uri":"\/hello?ab=cd","url":"http:\/\/localhost:1984\/hello?ab=cd","headers":{"host":"localhost","content-length":"6","connection":"close"},"body":"abcdef","method":"GET"},"response":{"headers":{"content-type":"text\/plain","server":"APISIX\/1.5","connection":"close","transfer-encoding":"chunked"},"status":200,"size":153},"latency":99.000215530396}

• origin:

  GET /hello?ab=cd HTTP/1.1
  host: localhost
  content-length: 6
  connection: close
  
  abcdef

Info

The message will write to the buffer first. It will send to the kafka server when the buffer exceed the batch_max_size, or every buffer_duration flush the buffer.

In case of success, returns true. In case of errors, returns nil with a string describing the error (buffer overflow).

Sample broker list

This plugin supports to push in to more than one broker at a time. Specify the brokers of the external kafka servers as below sample to take effect of this functionality.

{
    "127.0.0.1":9092,
    "127.0.0.1":9093
}

How To Enable

The following is an example on how to enable the kafka-logger for a specific route.

curl http://127.0.0.1:9080/apisix/admin/routes/5 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
    "plugins": {
       "kafka-logger": {
           "broker_list" :
             {
               "127.0.0.1":9092
             },
           "kafka_topic" : "test2",
           "key" : "key1",
           "batch_max_size": 1,
           "name": "kafka logger"
       }
    },
    "upstream": {
       "nodes": {
           "127.0.0.1:1980": 1
       },
       "type": "roundrobin"
    },
    "uri": "/hello"
}'

Test Plugin

*success:

$ curl -i http://127.0.0.1:9080/hello
HTTP/1.1 200 OK
...
hello, world

Disable Plugin

Remove the corresponding json configuration in the plugin configuration to disable the kafka-logger. APISIX plugins are hot-reloaded, therefore no need to restart APISIX.

$ curl http://127.0.0.1:2379/apisix/admin/routes/1  -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d value='
{
    "methods": ["GET"],
    "uri": "/hello",
    "plugins": {},
    "upstream": {
        "type": "roundrobin",
        "nodes": {
            "127.0.0.1:1980": 1
        }
    }
}'