使用规范

源码编译

从 Github 下载 Apache ShardingSphere 源码,对源码进行编译,操作命令如下。

git clone --depth 1 https://github.com/apache/shardingsphere.git
cd shardingsphere
mvn clean install -Dmaven.javadoc.skip=true -Dcheckstyle.skip=true -Drat.skip=true -Djacoco.skip=true -DskipITs -DskipTests -Prelease

agent 包输出目录为 shardingsphere-agent/shardingsphere-agent-distribution/target/apache-shardingsphere-${latest.release.version}-shardingsphere-agent-bin.tar.gz

agent 配置

  • 目录说明

创建 agent 目录,解压 agent 二进制包到 agent 目录。

mkdir agent
tar -zxvf apache-shardingsphere-${latest.release.version}-shardingsphere-agent-bin.tar.gz -C agent
cd agent
tree 
.
├── conf
│   ├── agent.yaml
│   └── logback.xml
├── plugins
│   ├── shardingsphere-agent-logging-base-${latest.release.version}.jar
│   ├── shardingsphere-agent-metrics-prometheus-${latest.release.version}.jar
│   ├── shardingsphere-agent-tracing-jaeger-${latest.release.version}.jar
│   ├── shardingsphere-agent-tracing-opentelemetry-${latest.release.version}.jar
│   ├── shardingsphere-agent-tracing-opentracing-${latest.release.version}.jar
│   └── shardingsphere-agent-tracing-zipkin-${latest.release.version}.jar
└── shardingsphere-agent.jar

  • 配置说明

agent.yaml 是配置文件,插件有 Jaeger、OpenTracing、Zipkin、OpenTelemetry、Logging、Prometheus。 如果需要开启插件时,只需要注释掉 ignoredPluginNames 中对应的插件即可。

applicationName: shardingsphere-agent
ignoredPluginNames:
  - Jaeger
  - OpenTracing
  - Zipkin
  - OpenTelemetry
  - Logging
  - Prometheus

plugins:
  Prometheus:
    host:  "localhost"
    port: 9090
    props:
      JVM_INFORMATION_COLLECTOR_ENABLED : "true"
  Jaeger:
    host: "localhost"
    port: 5775
    props:
      SERVICE_NAME: "shardingsphere-agent"
      JAEGER_SAMPLER_TYPE: "const"
      JAEGER_SAMPLER_PARAM: "1"
  Zipkin:
    host: "localhost"
    port: 9411
    props:
      SERVICE_NAME: "shardingsphere-agent"
      URL_VERSION: "/api/v2/spans"
      SAMPLER_TYPE: "const"
      SAMPLER_PARAM: "1"
  OpenTracing:
    props:
      OPENTRACING_TRACER_CLASS_NAME: "org.apache.skywalking.apm.toolkit.opentracing.SkywalkingTracer"
  OpenTelemetry:
    props:
      otel.resource.attributes: "service.name=shardingsphere-agent"
      otel.traces.exporter: "zipkin"
  Logging:
    props:
      LEVEL: "INFO"

  • 参数说明;
名称 说明 取值范围 默认值
JVM_INFORMATION_COLLECTOR_ENABLED 是否开启 JVM 采集器 true、false true
SERVICE_NAME 链路跟踪的服务名称 自定义 shardingsphere-agent
JAEGER_SAMPLER_TYPE Jaeger 采样率类型 const、probabilistic、ratelimiting、remote const
JAEGER_SAMPLER_PARAM Jaeger 采样率参数 const:0、1,probabilistic:0.0 - 1.0,ratelimiting:> 0,自定义每秒采集数量,remote:需要自定义配置远程采样率管理服务地址,JAEGER_SAMPLER_MANAGER_HOST_PORT 1(const 类型)
SAMPLER_TYPE Zipkin 采样率类型 const、counting、ratelimiting、boundary const
SAMPLER_PARAM Zipkin 采样率参数 const: 0、1,counting:0.01 - 1.0,ratelimiting:> 0,自定义每秒采集数量,boundary: 0.0001 - 1.0 1(const 类型)
otel.resource.attributes opentelemetry 资源属性 字符串键值对(,分割) service.name=shardingsphere-agent
otel.traces.exporter Tracing expoter zipkin、jaeger zipkin
otel.traces.sampler opentelemetry 采样率类型 always_on、always_off、traceidratio always_on
otel.traces.sampler.arg opentelemetry 采样率参数 traceidratio:0.0 - 1.0 1.0

ShardingSphere-Proxy 中使用

  • 启动脚本

    配置 shardingsphere-agent.jar 的绝对路径到 ShardingSphere-Proxy 的 start.sh 启动脚本中,请注意配置自己对应的绝对路径。

nohup java ${JAVA_OPTS} ${JAVA_MEM_OPTS} \
-javaagent:/xxxxx/agent/shardingsphere-agent.jar \
-classpath ${CLASS_PATH} ${MAIN_CLASS} >> ${STDOUT_FILE} 2>&1 &
  • 启动插件

通过改造后的 ShardingSphere-Proxy 的启动脚本启动。

bin/start.sh

正常启动可以在对应的 ShardingSphere-Proxy 日志查看到 plugin 的启动日志,访问 Proxy 后,可以通过配置的地址查看到 Metric 和 Tracing 的数据。