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skywalking-logger.md

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skywalking-logger

Summary

Name

skywalking-logger is a plugin which push Access Log data to SkyWalking OAP server over HTTP. If there is tracing context existing, it sets up the trace-log correlation automatically, and relies on SkyWalking Cross Process Propagation Headers Protocol.

This will provide the ability to send Access Log as JSON objects to SkyWalking OAP server.

Attributes

Name Type Requirement Default Valid Description
endpoint_addr string required The URI of the SkyWalking OAP server.
service_name string optional "APISIX" service name for SkyWalking reporter.
service_instance_name string optional "APISIX Instance Name" service instance name for SkyWalking reporter， set it to $hostname to get local hostname directly.
timeout integer optional 3 [1,...] Time to keep the connection alive after sending a request.
name string optional "skywalking logger" A unique identifier to identity the logger.
batch_max_size integer optional 1000 [1,...] Set the maximum number of logs sent in each batch. When the number of logs reaches the set maximum, all logs will be automatically pushed to the SkyWalking OAP server.
inactive_timeout integer optional 5 [1,...] The maximum time to refresh the buffer (in seconds). When the maximum refresh time is reached, all logs will be automatically pushed to the SkyWalking OAP server regardless of whether the number of logs in the buffer reaches the maximum number set.
buffer_duration integer optional 60 [1,...] Maximum age in seconds of the oldest entry in a batch before the batch must be processed.
max_retry_count integer optional 0 [0,...] Maximum number of retries before removing from the processing pipe line.
retry_delay integer optional 1 [0,...] Number of seconds the process execution should be delayed if the execution fails.
include_req_body boolean optional false [false, true] Whether to include the request body. false: indicates that the requested body is not included; true: indicates that the requested body is included.

How To Enable

The following is an example of how to enable the skywalking-logger for a specific route. Before that, an available SkyWalking OAP server was required and accessible.

curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
      "plugins": {
            "skywalking-logger": {
                "endpoint_addr": "http://127.0.0.1:12800"
            }
       },
      "upstream": {
           "type": "roundrobin",
           "nodes": {
               "127.0.0.1:1980": 1
           }
      },
      "uri": "/hello"
}'

Test Plugin

success:

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

Completion of the steps, could find the Log details on SkyWalking UI.

Metadata

skywalking-logger also supports to custom log format like http-logger.

Name Type Requirement Default Valid Description
log_format object optional {"host": "$host", "@timestamp": "$time_iso8601", "client_ip": "$remote_addr"} Log format declared as key value pair in JSON format. Only string is supported in the value part. If the value starts with $, it means to get APISIX variables or Nginx variable.

Note that the metadata configuration is applied in global scope, which means it will take effect on all Route or Service which use skywalking-logger plugin.

Disable Plugin

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

$ curl http://127.0.0.1:9080/apisix/admin/routes/1  -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
    "uri": "/hello",
    "plugins": {},
    "upstream": {
        "type": "roundrobin",
        "nodes": {
            "127.0.0.1:1980": 1
        }
    }
}'