1. Overview

1.1 Plugin Name

• Logging-ElasticSearch Plugin

1.2 Appropriate Scenario

• collect http request info to elasticsearch, query or display request info by another application(kibana).

1.3 Plugin functionality

Apache ShenYu The gateway receives requests from the client, forwards them to the server, and returns the server results to the client. The gateway can record the details of each request，
The list includes: request time, request parameters, request path, response result, response status code, time consumption, upstream IP, exception information waiting. Shenyu gateway can record access logs through logging-elasticsearch-plugin and send access logs to elasticsearch database.

1.4 Plugin code

• Core Module shenyu-plugin-logging-elasticsearch

• Core Class org.apache.shenyu.plugin.logging.elasticsearch.LoggingElasticSearchPlugin

• Core Class org.apache.shenyu.plugin.logging.elasticsearch.client.ElasticSearchLogCollectClient

1.5 Added Since Which shenyu version

• Since 2.5.0

1.6 Technical Solutions

• Architecture Diagram

2. How to use plugin

2.1 Plugin-use procedure chart

2.2 Import pom

• Add the dependency of logging-elasticsearch to the Shenyu-bootstrap-module 's pom.xml file.

 <!--shenyu logging-elasticsearch plugin start-->
<dependency>
    <groupId>org.apache.shenyu</groupId>
    <artifactId>shenyu-spring-boot-starter-plugin-logging-elasticsearch</artifactId>
    <version>${project.version}</version>
</dependency>
<!--shenyu logging-elasticsearch plugin end-->

2.3 Enable plugin

• In shenyu-admin --> Basic Configuration --> Plugin Management --> loggingElasticSearch, configure the ElasticSearch parameter and set it to on.

2.4 Config plugin

2.4.1 Open the plugin and configure elasticsearch, configure it as follows.

• The individual configuration items are described as follows:

config-item	type	description	remarks
host	String	host name	must
port	String	port num	must
sampleRate	String	Sampling rate, range 0~1, 0: off, 0.01: acquisition 1%, 1: acquisition 100%	Optional, default 1, all collection
compressAlg	String	Compression algorithm, no compression by default, currently supports LZ4 compression	Optional, no compression by default
maxResponseBody	Ingeter	Maximum response size, above the threshold no response will be collected	Optional, default 512KB
maxRequestBody	Ingeter	Maximum request body size, above the threshold no request body will be collected	Optional, default 512KB
Except for host, port, all others are optional, in most cases only these 3 items need to be configured.

2.4.2 Configuring Selectors and Rulers

For detailed configuration of selectors and rules, please refer to: Selector and rule management. In addition, sometimes a large gateway cluster corresponds to multiple applications (business), different applications (business) correspond to different topics, related to isolation,
then you can configure different topics (optional) and sampling rate (optional) by selector, the meaning of the configuration items as shown in the table above.
The operation is shown below:

2.5 Logging information

The fields of the captured access log are as follows.

Field Name	Meaning	Description	Remarks
clientIp	Client IP
timeLocal	Request time string, format: yyyy-MM-dd HH:mm:ss.SSS
method	request method (different rpc type is not the same, http class for: get, post wait, rpc class for the interface name)
requestHeader	Request header (json format)
responseHeader	Response header (json format)
queryParams	Request query parameters
requestBody	Request Body (body of binary type will not be captured)
requestUri	Request uri
responseBody	Response body
responseContentLength	Response body size
rpcType	rpc type
status	response status
upstreamIp	Upstream (program providing the service) IP
upstreamResponseTime	Time taken by the upstream (program providing the service) to respond to the request (ms ms)
userAgent	Requested user agent
host	The requested host
module	Requested modules
path	The requested path
traceId	Requested Link Tracking ID	Need to access link tracking plugins, such as skywalking,zipkin

2.6 Examples

2.6.1 Collect Http Log by ElasticSearch

2.6.1.1 Install ElasticSearch

Users need to deploy the ElasticSearch service to collect

2.6.1.1.1 Installing ElasticSearch under Windows Environment

• To download address Select Windows version to download
• After downloading the installation package, unzip it, enter the bin directory, and double-click to execute elasticsearch.bat to start
• The default startup port is 9200. Accesshttp://localhost:9200, verify success

2.6.1.1.2 Installing ElasticSearch in MacOS environment

• To download address Select Windows version to download
• After downloading the installation package, unzip it, enter the bin directory and execute the startup command on the terminal: ./elasticsearch
• The default startup port is 9200. Access http://localhost:9200, verify success

2.6.1.2 Install Kibana

2.6.1.2.1 Installing Kibana under Windows Environment

• To download address Select Windows version to download
• After downloading the installation package, unzip it, enter the bin directory, and double-click to execute kibana.bat to start
• The default startup port is 5601. Access http://localhost:5601, verify success

2.6.1.2.2 Installing Kibana in MacOS environment

• To download address Select Windows version to download
• After downloading the installation package, unzip it, enter the bin directory and execute the startup command on the terminal: ./kibana
• The default startup port is 5601. Access http://localhost:5601, verify success

2.6.1.3 Plugin Configuration

2.6.1.4 Selector and Rule Configuration

• For detailed configuration of selectors and rules, please refer to:Selector and rule management。

2.6.1.5 Using postman to initiate a request

2.6.1.6 Querying data using kibaba

• The first time you use the plug-in, you will automatically create a shenyu-access-logging index

• Using ES query statement, the requested log information can be queried

3. How to disable plugin

• In shenyu-admin --> BasicConfig --> Plugin --> LoggingElasticSearch set Status disable.