Spring Cloud Learning (8)-Sleuth & Zipkin call chain tracking

In a business complex microservices architecture, it is often difficult to comb the call relationships between services, one HTTP request may involve calls to multiple services (Eg:service A, service B, service C ...), if you want to analyze the call relationships between services, And the response time of each service, find the service that has the performance bottleneck, then Zipkin comes in handy, it is a tracing system of open source of Twitter company, the official website address is: http://zipkin.io/, Spring Cloud can integrate with it undoubtedly.

Steps to use:

One, the micro-service party

1.1 adding dependent jar packages

    Compile ' Org.springframework.cloud:spring-cloud-starter-bus-kafka '    compile ' org.springframework.cloud: Spring-cloud-starter-sleuth '    compile ' org.springframework.cloud:spring-cloud-sleuth-stream '

Note: In order to realize the decoupling of tracing data buried point and acquisition, Spring Cloud introduces the concept of message bus, the micro-service does not need to care about the tracing system, what it looks like, just throw the message on the bus. So the introduction of Bus-kafka and Sleuth-stream.

1.2 APPLICATION.YML Configuration

Spring: ...  Cloud:    bus:      enabled:true    stream:      default-binder:kafka      Kafka:        Binder:          Brokers: 10.0.1.2,10.0.1.3,10.0.1.4//kafaka server cluster list          zknodes:10.0.1.5,10.0.1.6,10.0.1.7//ZK server cluster list          defaultzkport:2181//zk Port          defaultbrokerport:9092//kafka Broker Port ...  Sleuth:    Sampler:      percentage:0.2//Sample rate 0.2 is 20%

The above 2 configuration is OK, the code without any modification, the real code 0 intrusion

Second, Zipkin-server

Zipkin received data from the Kafka, there are 4 ways to Save: In-memory (save in memory), MySQL, Cassandra, Elasticsearch

Personal development debugging, recommend using In-memory mode, other environments do not use! (Note: Because as more data is collected, it can easily cause oom in memory)

2.1 MySQL Storage

2.1.1 Main jar Package dependencies

dependencies {    ... The key is the following several    compile ' org.springframework.cloud:spring-cloud-starter-sleuth '    compile ' Org.springframework.cloud:spring-cloud-sleuth-zipkin-stream '    compile ' org.springframework.cloud: Spring-cloud-starter-bus-kafka '    compile ' io.zipkin.java:zipkin-server '    compile ' Io.zipkin.java: Zipkin-autoconfigure-ui '    compile ' io.zipkin.java:zipkin-autoconfigure-storage-mysql ' #mysql的存储    ... The following are the general items of Spring-boot/cloud    compile ' org.springframework.boot:spring-boot-starter-actuator '    compile ' Org.springframework.boot:spring-boot-starter-web '    compile ' org.springframework.boot: Spring-boot-starter-security '    compile ' log4j:log4j:1.2.17 '//zipkin storage jar package, dependent on the lower version of log4j    compile ' org.apache.logging.log4j:log4j-slf4j-impl:2.8.2 '    compile ' mysql:mysql-connector-java:6.0.5 '   }

2.1.2 application.yml Configuration

Spring:  application:    name:zipkin-server  DataSource://Specify MySQL data source    schema:classpath:/mysql.sql    url:jdbc:mysql://192.168.1.2:3306/zipkin?autoreconnect=true&usessl=false    username:root    Password: * * *    driver-class-name:com.mysql.cj.jdbc.driver    initialize:true    continue-on-error:true  Sleuth:    enabled:false  Cloud:    bus:      enabled:true    ... Stream:      default-binder:kafka      Kafka:        Binder:          brokers: ${kafka.brokers}          zknodes: ${ Kafka.zknodes}          defaultzkport: ${kafka.zkport}          defaultbrokerport: ${kafka.brokerport}zipkin:  Storage:    Type:mysql//configured as MySQL storage

2.1.3 Main entry code

@SpringBootApplication (exclude = {         Mybatisautoconfiguration.class,        Redisautoconfiguration.class,        Redisrepositoriesautoconfiguration.class}) @EnableZipkinStreamServerpublic class Zipkinserver {public    static void Main (string[] args) {        springapplication.run (zipkinserver.class, args);}    }

Note: If your project relies on other packages such as Redis,mybatis, you can refer to the above wording, excluding these automatic configuration, otherwise, do not add that a bunch of exclude.

2.2 Cassandra

2.2.1 dependent jar Package

Note: Under Cassandra and Elasticsearch, you may encounter the dependencies panel in Zipkin without data, see the discussion on GitHub for details: https://github.com/openzipkin/ Zipkin-dependencies/issues/22

    Compile ' Org.springframework.boot:spring-boot-starter-data-cassandra '    compile (' Io.zipkin.java: zipkin-autoconfigure-storage-cassandra3:1.29.3 ') {        exclude group: "Com.datastax.cassandra", module: " Cassandra-driver-core "    }    Compile ' com.datastax.cassandra:cassandra-driver-core:3.1.1 '    compile ' com.datastax.cassandra:cassandra-driver-mapping:3.1.1 '

2.2.2 Application.yml

Spring:  data:    Cassandra:      contact-points:localhost      port:9042      keyspace-name:zipkin3  ... Zipkin:  storage:    type:cassandra3

2.3 Elasticsearch

2.3.1 Dependent jar Package

Compile ' io.zipkin.dependencies:zipkin-dependencies-elasticsearch:1.7.2 ' compile ' Io.zipkin.java: zipkin-autoconfigure-storage-elasticsearch-http:1.29.2 '

2.3.2 application.yml

Zipkin:  storage:    type:elasticsearch    elasticsearch:      cluster:elasticsearch      hosts:http:// localhost:9200      index:zipkin      index-shards:5      index-replicas:1

Spring Cloud Learning (8)-Sleuth & Zipkin call chain tracking