Zipkin service link tracking

One 、Zipkin brief introduction

Zipkin Is an open source distributed tracking system , Every service to zipkin Report timing data ,zipkin According to the calling relationship Zipkin UI Generate dependency graph .

Zipkin Provides pluggable data storage ：In-Memory、MySql、Cassandra as well as Elasticsearch. In order to facilitate the development environment, I directly adopted In-Memory Method for storage , Recommended for large production data Elasticsearch.

Two 、Zipkin Basic terminology

• Span

Basic work unit , for example , In a new span Send a RPC Equivalent to sending a response request to RPC,span Through one 64 position ID Unique identification ,trace Take another 64 position ID Express ,span And other data , For example, abstract 、 Timestamp event 、 Key notes (tags)、span Of ID、 And progress ID( Usually IP Address )
span Starting and stopping constantly , At the same time, time information is recorded , When you create a span, You have to stop it at some point in the future .

• Trace

A series of spans A tree structure of , for example , If you're running a distributed big data project , You may need to create a trace.

• Annotation

Used to record the existence of an event in time , Some core annotations Used to define the beginning and end of a request
cs - Client Sent - Client initiates a request , This annotion Describes this span The beginning of
sr - Server R