Apollo Server 集成性能监控

Apollo Server开箱支持Apollo Engine,只是由于某些不可知的原因Apollo Engine的 API 在国内不可访问(我是真不知道为什么这个 API 会被墙的),所以只能另外想办法了.

Apollo Server本身有一个Apollo Tracing可以用于性能监控的扩展,通过扩展Apollo Tracing收集指标传输到分布式跟踪系统中.
另外有一个开源库Apollo Opentracing可以收集指标,传输到Jaeger或者Zipkin中,通过Jaeger或Zipkin实现性能监控和分析.

秉着方便,直接使用Apollo Opentracing.分布式跟踪系统使用Jaeger.

使用 Docker 搭建Jaeger

Jaeger 官方文档

在浏览器打开 http://localhost:16686 访问Jaeger

搭建Apollo Server

mkdir apollo-opentracing-demo
cd apollo-opentracing-demo
yarn init -y
yarn add apollo-server

// index.js
const { ApolloServer, gql } = require('apollo-server')

const typeDefs = gql`
  type Query {
    hello: String
  }
`

const resolvers = {
  Query: {
    hello: () => 'world',
  },
}

const server = new ApolloServer({
  typeDefs,
  resolvers,
})

server.listen().then(({ url }) => {
  console.log(`🚀 Server ready at ${url}`)
})

运行

node index.js

集成Apollo Opentracing

yarn add apollo-opentracing jaeger-client

// tracer.js
const { default: OpentracingExtension } = require('apollo-opentracing')
const { initTracer } = require('jaeger-client')

const config = {
  serviceName: 'apollo-opentracing-demo',
  sampler: {
    type: 'const',
    param: 1,
  },
  reporter: {
    logSpans: true,
    collectorEndpoint: 'http://localhost:14268/api/traces',
  },
}

const options = {
  logger: {
    info(msg) {
      console.log('INFO ', msg)
    },
    error(msg) {
      console.log('ERROR', msg)
    },
  },
}

const tracer = initTracer(config, options)

const opentracingExtension = () => {
  console.log(123)
  return new OpentracingExtension({
    local: tracer,
    server: tracer,
  })
}
module.exports = {
  opentracingExtension,
}

const { opentracingExtension } = require('./tracer.js') // 引入扩展

...

const server = new ApolloServer({
  typeDefs,
  resolvers,
  extensions: [opentracingExtension], // 使用扩展
})
...

使用

用浏览器打开 http://localhost:4000/

使用以下语句查询

query {
  hello
}

然后打开 http://localhost:16686

点击Find Traces就能看到刚刚查询的指标

参考

• Performance Tracing for GraphQL with Apollo and it’s friends
• Apollo Opentracing
• Jaeger
• jaeger-client-node