| --- |
| title: skywalking-logger |
| keywords: |
| - Apache APISIX |
| - API Gateway |
| - Plugin |
| - SkyWalking Logger |
| - skywalking-logger |
| description: This document contains information about the Apache APISIX skywalking-logger Plugin. |
| --- |
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| |
| ## Description |
| |
| The `skywalking-logger` Plugin can be used to push access log data to SkyWalking OAP server of HTTP. |
| |
| If there is an existing tracing context, it sets up the trace-log correlation automatically and relies on [SkyWalking Cross Process Propagation Headers Protocol](https://skywalking.apache.org/docs/main/next/en/api/x-process-propagation-headers-v3/). This provides the ability to send access logs as JSON objects to the SkyWalking OAP server. |
| |
| ## Attributes |
| |
| | Name | Type | Required | Default | Valid values | Description | |
| |-----------------------|---------|----------|------------------------|---------------|--------------------------------------------------------------------------------------------------------------| |
| | endpoint_addr | string | True | | | URI of the SkyWalking OAP server. | |
| | service_name | string | False | "APISIX" | | Service name for the SkyWalking reporter. | |
| | service_instance_name | string | False | "APISIX Instance Name" | | Service instance name for the SkyWalking reporter. Set it to `$hostname` to directly get the local hostname. | |
| | log_format | object | False | | | Log format declared as key value pairs in JSON format. Values only support strings. [APISIX](../apisix-variable.md) or [Nginx](http://nginx.org/en/docs/varindex.html) variables can be used by prefixing the string with `$`. | |
| | timeout | integer | False | 3 | [1,...] | Time to keep the connection alive for after sending a request. | |
| | name | string | False | "skywalking logger" | | Unique identifier to identify the logger. If you use Prometheus to monitor APISIX metrics, the name is exported in `apisix_batch_process_entries`. | |
| | include_req_body | boolean | False | false | [false, true] | When set to `true` includes the request body in the log. | |
| | 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](https://github.com/api7/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 | | | When the `include_resp_body` attribute is set to `true`, use this to filter based on [lua-resty-expr](https://github.com/api7/lua-resty-expr). If present, only logs the response if the expression evaluates to `true`. | |
| |
| 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](../batch-processor.md#configuration) for more information or setting your custom configuration. |
| |
| ### Example of default log format |
| |
| ```json |
| { |
| "serviceInstance": "APISIX Instance Name", |
| "body": { |
| "json": { |
| "json": "body-json" |
| } |
| }, |
| "endpoint": "/opentracing", |
| "service": "APISIX" |
| } |
| ``` |
| |
| For body-json data, it is an escaped json string |
| |
| ```json |
| { |
| "response": { |
| "status": 200, |
| "headers": { |
| "server": "APISIX/3.7.0", |
| "content-type": "text/plain", |
| "transfer-encoding": "chunked", |
| "connection": "close" |
| }, |
| "size": 136 |
| }, |
| "route_id": "1", |
| "upstream": "127.0.0.1:1982", |
| "upstream_latency": 8, |
| "apisix_latency": 101.00020599365, |
| "client_ip": "127.0.0.1", |
| "service_id": "", |
| "server": { |
| "hostname": "localhost", |
| "version": "3.7.0" |
| }, |
| "start_time": 1704429712768, |
| "latency": 109.00020599365, |
| "request": { |
| "headers": { |
| "content-length": "9", |
| "host": "localhost", |
| "connection": "close" |
| }, |
| "method": "POST", |
| "body": "body-data", |
| "size": 94, |
| "querystring": {}, |
| "url": "http://localhost:1984/opentracing", |
| "uri": "/opentracing" |
| } |
| } |
| ``` |
| |
| ## 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 | | Log format declared as key value pairs in JSON format. Values only support strings. [APISIX](../apisix-variable.md) or [Nginx](http://nginx.org/en/docs/varindex.html) variables can be used by prefixing the string with `$`. | |
| |
| :::info IMPORTANT |
| |
| Configuring the Plugin metadata is global in scope. This means that it will take effect on all Routes and Services which use the `skywalking-logger` Plugin. |
| |
| ::: |
| |
| The example below shows how you can configure through the Admin API: |
| |
| :::note |
| You can fetch the `admin_key` from `config.yaml` and save to an environment variable with the following command: |
| |
| ```bash |
| admin_key=$(yq '.deployment.admin.admin_key[0].key' conf/config.yaml | sed 's/"//g') |
| ``` |
| |
| ::: |
| |
| ```shell |
| curl http://127.0.0.1:9180/apisix/admin/plugin_metadata/skywalking-logger -H "X-API-KEY: $admin_key" -X PUT -d ' |
| { |
| "log_format": { |
| "host": "$host", |
| "@timestamp": "$time_iso8601", |
| "client_ip": "$remote_addr" |
| } |
| }' |
| ``` |
| |
| With this configuration, your logs would be formatted as shown below: |
| |
| ```shell |
| {"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"} |
| ``` |
| |
| ## Enable Plugin |
| |
| Once you have set up your SkyWalking OAP server, you can enable the Plugin on a specific Route as shown below: |
| |
| ```shell |
| curl http://127.0.0.1:9180/apisix/admin/routes/1 -H "X-API-KEY: $admin_key" -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" |
| }' |
| ``` |
| |
| ## Example usage |
| |
| Now, if you make a request to APISIX, it will be logged in your SkyWalking OAP server: |
| |
| ```shell |
| curl -i http://127.0.0.1:9080/hello |
| ``` |
| |
| ## Delete Plugin |
| |
| To remove the `skywalking-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. |
| |
| ```shell |
| curl http://127.0.0.1:9180/apisix/admin/routes/1 -H "X-API-KEY: $admin_key" -X PUT -d ' |
| { |
| "uri": "/hello", |
| "plugins": {}, |
| "upstream": { |
| "type": "roundrobin", |
| "nodes": { |
| "127.0.0.1:1980": 1 |
| } |
| } |
| }' |
| ``` |
