Monitoring：Apache ShenYu API Gateway

monitor ShenYu running status(JVM-related), include request response and other related metrics.

Pre-monitoring operations

Enable metrics plugin in ShenYu, expose it's prometheus metrics endpoint。

Refer ShenYu Document

Two Steps Mainly:

1. add metrics plugin dependency in gateway's pom.xml.

   <dependency>
       <groupId>org.apache.shenyu</groupId>
       <artifactId>shenyu-spring-boot-starter-plugin-metrics</artifactId>
       <version>${project.version}</version>
   </dependency>

2. modify this config in shenyu gateway yaml.

   shenyu:
     metrics:
       enabled: false #false is close, true is open
       name : prometheus 
       host: 127.0.0.1 
       port: 8090 
       jmxConfig: 
       props:
         jvm_enabled: true #enable jvm monitoring

Finally, restart the access gateway metrics endpoint http://ip:8090 to respond to prometheus format data.

Configuration parameters

Parameter name	Parameter help description
Monitoring Host	The peer IPV4, IPV6 or domain name to be monitored. Note ⚠️Without protocol header (eg: https://, http://).
Monitoring name	The name that identifies this monitoring, and the name needs to be unique.
Port	The port provided by the gateway Metric interface, the default is 8090.
Timeout	HTTP request response timeout
Acquisition Interval	Interval time for monitoring periodic data collection, in seconds, the minimum interval that can be set is 30 seconds
Whether to detect	Whether to detect and check the availability of monitoring before adding monitoring, and the operation of adding and modifying will continue after the detection is successful
Description Remarks	More remark information to identify and describe this monitoring, users can remark information here

Collect metrics

Index collection: shenyu_request_total

Metric Name	Metric Unit	Metric Help Description
value	None	Collect all requests from ShenYu gateway

Metric collection: shenyu_request_throw_created

Metric Name	Metric Unit	Metric Help Description
value	None	Collect the number of abnormal requests from ShenYu Gateway

Metric collection: process_cpu_seconds_total

Metric Name	Metric Unit	Metric Help Description
value	none	total user and system CPU elapsed seconds

Metric collection: process_open_fds

Metric Name	Metric Unit	Metric Help Description
value	none	number of open file descriptors

Metric collection: process_max_fds

Metric Name	Metric Unit	Metric Help Description
value	none	maximum number of open file descriptors

Metric collection: jvm_info

Metric Name	Metric Unit	Metric Help Description
runtime	none	JVM version information
vendor	none	JVM version information
version	None	JVM version information

Metric collection: jvm_memory_bytes_used

Metric Name	Metric Unit	Metric Help Description
area	None	JVM memory area
value	MB	used size of the given JVM memory region

Metric collection: jvm_memory_pool_bytes_used

Metric Name	Metric Unit	Metric Help Description
pool	None	JVM memory pool
value	MB	used size of the given JVM memory pool

Metric collection: jvm_memory_pool_bytes_committed

Metric Name	Metric Unit	Metric Help Description
pool	None	JVM memory pool
value	MB	The committed size of the given JVM memory pool

Metric collection: jvm_memory_pool_bytes_max

Metric Name	Metric Unit	Metric Help Description
pool	None	JVM memory pool
value	MB	The maximum size of the memory pool for the given JVM

Metric collection: jvm_threads_state

Metric Name	Metric Unit	Metric Help Description
state	none	thread state
value	None	The number of threads corresponding to the thread state