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rocketmq-logger.md

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rocketmq-logger
Apache APISIX
API Gateway
Plugin
RocketMQ Logger
This document contains information about the Apache APISIX rocketmq-logger Plugin.

Description

The rocketmq-logger Plugin provides the ability to push logs as JSON objects to your RocketMQ clusters.

It might take some time to receive the log data. It will be automatically sent after the timer function in the batch processor expires.

Attributes

Name Type Required Default Valid values Description
nameserver_list object True List of RocketMQ nameservers.
topic string True Target topic to push the data to.
key string False Key of the messages.
tag string False Tag of the messages.
log_format object False {"host": "$host", "@timestamp": "$time_iso8601", "client_ip": "$remote_addr"} Log format declared as key value pairs in JSON format. Values only support strings. APISIX or Nginx variables can be used by prefixing the string with $.
timeout integer False 3 [1,...] Timeout for the upstream to send data.
use_tls boolean False false When set to true, uses TLS.
access_key string False "" Access key for ACL. Setting to an empty string will disable the ACL.
secret_key string False "" secret key for ACL.
name string False "rocketmq logger" Unique identifier for the batch processor.
meta_format enum False "default" ["default"，"origin"] Format to collect the request information. Setting to default collects the information in JSON format and origin collects the information with the original HTTP request. See examples below.
include_req_body boolean False false [false, true] When set to true includes the request body in the log. If the request body is too big to be kept in the memory, it can't be logged due to Nginx's limitations.
include_req_body_expr array False Filter for when the include_req_body attribute is set to true. Request body is only logged when the expression set here evaluates to true. See lua-resty-expr for more.
include_resp_body boolean False false [false, true] When set to true includes the response body in the log.
include_resp_body_expr array False Filter for when the include_resp_body attribute is set to true. Response body is only logged when the expression set here evaluates to true. See lua-resty-expr for more.

NOTE: encrypt_fields = {"secret_key"} is also defined in the schema, which means that the field will be stored encrypted in etcd. See encrypted storage fields.

This Plugin supports using batch processors to aggregate and process entries (logs/data) in a batch. This avoids the need for frequently submitting the data. The batch processor submits data every 5 seconds or when the data in the queue reaches 1000. See Batch Processor for more information or setting your custom configuration.

:::info IMPORTANT

The data is first written to a buffer. When the buffer exceeds the batch_max_size or buffer_duration attribute, the data is sent to the RocketMQ server and the buffer is flushed.

If the process is successful, it will return true and if it fails, returns nil with a string with the "buffer overflow" error.

:::

meta_format example

  • default:

        {
     "upstream": "127.0.0.1:1980",
     "start_time": 1619414294760,
     "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": {
         "connection": "close",
         "content-type": "text/plain; charset=utf-8",
         "date": "Mon, 26 Apr 2021 05:18:14 GMT",
         "server": "APISIX/2.5",
         "transfer-encoding": "chunked"
       },
       "size": 190,
       "status": 200
     },
     "server": {
       "hostname": "localhost",
       "version": "2.5"
     },
     "latency": 0
    }

  • origin:

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

    abcdef

Metadata

You can also set the format of the logs by configuring the Plugin metadata. The following configurations are available:

Name Type Required Default Description
log_format object False {"host": "$host", "@timestamp": "$time_iso8601", "client_ip": "$remote_addr"} Log format declared as key value pairs in JSON format. Values only support strings. APISIX or Nginx variables can be used by prefixing the string with $.

:::info IMPORTANT

Configuring the Plugin metadata is global in scope. This means that it will take effect on all Routes and Services which use the rocketmq-logger Plugin.

:::

The example below shows how you can configure through the Admin API:

curl http://127.0.0.1:9180/apisix/admin/plugin_metadata/rocketmq-logger -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
    "log_format": {
        "host": "$host",
        "@timestamp": "$time_iso8601",
        "client_ip": "$remote_addr"
    }
}'

With this configuration, your logs would be formatted as shown below:

{"host":"localhost","@timestamp":"2020-09-23T19:05:05-04:00","client_ip":"127.0.0.1","route_id":"1"}
{"host":"localhost","@timestamp":"2020-09-23T19:05:05-04:00","client_ip":"127.0.0.1","route_id":"1"}

Enabling the Plugin

The example below shows how you can enable the rocketmq-logger Plugin on a specific Route:

curl http://127.0.0.1:9180/apisix/admin/routes/5 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
    "plugins": {
       "rocketmq-logger": {
           "nameserver_list" : [ "127.0.0.1:9876" ],
           "topic" : "test2",
           "batch_max_size": 1,
           "name": "rocketmq logger"
       }
    },
    "upstream": {
       "nodes": {
           "127.0.0.1:1980": 1
       },
       "type": "roundrobin"
    },
    "uri": "/hello"
}'

This Plugin also supports pushing to more than one nameserver at a time. You can specify multiple nameserver in the Plugin configuration as shown below:

"nameserver_list" : [
    "127.0.0.1:9876",
    "127.0.0.2:9876"
]

Example usage

Now, if you make a request to APISIX, it will be logged in your RocketMQ server:

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

Disable Plugin

To disable the rocketmq-logger 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/1  -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
    "methods": ["GET"],
    "uri": "/hello",
    "plugins": {},
    "upstream": {
        "type": "roundrobin",
        "nodes": {
            "127.0.0.1:1980": 1
        }
    }
}'