ballerina 服务的监控还是比较方便的，以及集成了Prometheus Grafana Jaeger Elastic Stack
监控服务监控的集成
主要包含以下几个步骤
a. 安装docker Prometheus Grafana Jaeger Elastic Stack
b. 创建简单ballerian 服务
c. 监控ballerina 服务（--observe 选项，启动之后，默认会使用使用http endpoint 发送监控指标，同时也可以使用配置文件 ballerian.conf 配置
ballerina run --config <path-to-conf>/ballerina.conf ballerinaservice
d. 发送一些请求 http://localhost:9090/hello/sayHello
e. 通过dashboard 查看指标信息
Jaeger via http://localhost:16686/
Grafana dashboard on http://localhost:3000/
Kibana via http://localhost:5601参考代码
import ballerina/http;
import ballerina/log;
service<http:Service> hello bind { port:9090 } {
sayHello (endpoint caller, http:Request req) {
log:printInfo("This is a test Info log");
log:printError("This is a test Error log");
log:printWarn("This is a test Warn log");
http:Response res = new;
res.setPayload("Hello, World!");
_ = caller -> respond(res);
}
}修改默认配置参考文档
| Configuration Key | Description | Default Value | Possible Values |
|---|---|---|---|
| b7a.observability.metrics. enabled | Whether metrics monitoring is enabled (true) or disabled (false) | false | true or false |
| b7a.observability.metrics. provider | Provider name which implements Metrics interface. This is only required to be modified if a custom provider is implemented and needs to be used. | micrometer | micrometer or if any custom implementation, then name of the provider. |
| b7a.observability.metrics. micrometer.registry.name | Name of the registry used in micrometer | prometheus | prometheus |
| b7a.observability.metrics. prometheus.port | The value of the port in which the service '/metrics' will be bind to. This service will be used by Prometheus to scrape the information of the Ballerina service. | 9797 | Any suitable value for port 0 - 0 - 65535. However, within that range, ports 0 - 1023 are generally reserved for specific purposes, therefore it is advisable to select a port without that range. |
| b7a.observability.metrics. prometheus.hostname | The hostname in which the service '/metrics' will be bind to. This service will be used by Prometheus to scrape the information of the Ballerina service. | 0.0.0.0 | IP or Hostname or 0.0.0.0 of the node in which the Ballerina service is running. |
| b7a.observability.metrics. prometheus.descriptions | This flag indicates whether meter descriptions should be sent to Prometheus. Turn this off to minimize the amount of data sent on each scrape. | false | true or false |
| b7a.observability.metrics. prometheus.step | The step size to use in computing windowed statistics like max. To get the most out of these statistics, align the step interval to be close to your scrape interval. | PT1M (1 minute) | The formats accepted are based on the ISO-8601 duration format PnDTnHnMn.nS with days considered to be exactly 24 hours. |
参考文档
https://ballerina.io/learn/how-to-observe-ballerina-code/
