go微服务框架kratos学习笔记九(kratos 全链路追踪 zipkin)

比眉伴天荒 2023-07-08 09:20 12阅读 0赞

# go微服务框架kratos学习笔记九(kratos 全链路追踪 zipkin) #

### 文章目录 ###

*  go微服务框架kratos学习笔记九(kratos 全链路追踪 zipkin)
 *   *  zipkin使用demo
     *  数据持久化

--------------------

当代的互联网的服务，通常都是用复杂的、大规模分布式集群来实现的。互联网应用构建在不同的软件模块集上，这些软件模块，有可能是由不同的团队开发、可能使用不同的编程语言来实现、有可能布在了几千台服务器，横跨多个不同的数据中心。因此，就需要一些可以帮助理解系统行为、用于分析性能问题的工具。

本节简单搭建一下zipkin，zipkin是Twitter基于google的分布式监控系统Dapper（论文）的开发源实现，zipkin用于跟踪分布式服务之间的应用数据链路，分析处理延时，帮助我们改进系统的性能和定位故障。

同时kratos基于[opentracing][]语义，可以将zipkin集成了进去

搭建 Zipkin ，启动一个zipkin服务，最简单的办法是直接使用 Zipkin 官方的 Docker 镜像。

如果只是为了测试用，可以pull 下来直接启动一个，数据会在内存里面，我这里`docker pull`需要翻墙.

`启动zipkin`

docker run -d --restart always -v /etc/localtime:/etc/localtime:ro -p 9411:9411 --name zipkin openzipkin/zipkin

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3MzA4MzIx_size_16_color_FFFFFF_t_70]

> 进入127.0.0.1:9411查看

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3MzA4MzIx_size_16_color_FFFFFF_t_70 1]

## zipkin使用demo ##

照惯例new 一个demo 服务

在main函数内进行初始化，添加如下代码：

func main(){
        
        zipkin.Init(&zipkin.Config{
        
            Endpoint: "http://localhost:9411/api/v2/spans",
        })
        // 忽略其他代码
    }

调用一下sayhello接口  
![在这里插入图片描述][20200226115023968.png]

再看看zipkin 是否有数据

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3MzA4MzIx_size_16_color_FFFFFF_t_70 2]

## 数据持久化 ##

生产环境中，可能会需要做数据的持久化，官方提供了很多支持，这里举例mysql、同样docker运行一份mysql服务。

docker run -p 3306:3306 --name mysql -e MYSQL_ROOT_PASSWORD=123456 mysql:latest

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3MzA4MzIx_size_16_color_FFFFFF_t_70 3]

官方建表语句 : [mysql.sql][]

--
    -- Copyright 2015-2019 The OpenZipkin Authors
    --
    -- Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
    -- in compliance with the License. You may obtain a copy of the License at
    --
    -- http://www.apache.org/licenses/LICENSE-2.0
    --
    -- Unless required by applicable law or agreed to in writing, software distributed under the License
    -- is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
    -- or implied. See the License for the specific language governing permissions and limitations under
    -- the License.
    --
    
    CREATE TABLE IF NOT EXISTS zipkin_spans (
      `trace_id_high` BIGINT NOT NULL DEFAULT 0 COMMENT 'If non zero, this means the trace uses 128 bit traceIds instead of 64 bit',
      `trace_id` BIGINT NOT NULL,
      `id` BIGINT NOT NULL,
      `name` VARCHAR(255) NOT NULL,
      `remote_service_name` VARCHAR(255),
      `parent_id` BIGINT,
      `debug` BIT(1),
      `start_ts` BIGINT COMMENT 'Span.timestamp(): epoch micros used for endTs query and to implement TTL',
      `duration` BIGINT COMMENT 'Span.duration(): micros used for minDuration and maxDuration query',
      PRIMARY KEY (`trace_id_high`, `trace_id`, `id`)
    ) ENGINE=InnoDB ROW_FORMAT=COMPRESSED CHARACTER SET=utf8 COLLATE utf8_general_ci;
    
    ALTER TABLE zipkin_spans ADD INDEX(`trace_id_high`, `trace_id`) COMMENT 'for getTracesByIds';
    ALTER TABLE zipkin_spans ADD INDEX(`name`) COMMENT 'for getTraces and getSpanNames';
    ALTER TABLE zipkin_spans ADD INDEX(`remote_service_name`) COMMENT 'for getTraces and getRemoteServiceNames';
    ALTER TABLE zipkin_spans ADD INDEX(`start_ts`) COMMENT 'for getTraces ordering and range';
    
    CREATE TABLE IF NOT EXISTS zipkin_annotations (
      `trace_id_high` BIGINT NOT NULL DEFAULT 0 COMMENT 'If non zero, this means the trace uses 128 bit traceIds instead of 64 bit',
      `trace_id` BIGINT NOT NULL COMMENT 'coincides with zipkin_spans.trace_id',
      `span_id` BIGINT NOT NULL COMMENT 'coincides with zipkin_spans.id',
      `a_key` VARCHAR(255) NOT NULL COMMENT 'BinaryAnnotation.key or Annotation.value if type == -1',
      `a_value` BLOB COMMENT 'BinaryAnnotation.value(), which must be smaller than 64KB',
      `a_type` INT NOT NULL COMMENT 'BinaryAnnotation.type() or -1 if Annotation',
      `a_timestamp` BIGINT COMMENT 'Used to implement TTL; Annotation.timestamp or zipkin_spans.timestamp',
      `endpoint_ipv4` INT COMMENT 'Null when Binary/Annotation.endpoint is null',
      `endpoint_ipv6` BINARY(16) COMMENT 'Null when Binary/Annotation.endpoint is null, or no IPv6 address',
      `endpoint_port` SMALLINT COMMENT 'Null when Binary/Annotation.endpoint is null',
      `endpoint_service_name` VARCHAR(255) COMMENT 'Null when Binary/Annotation.endpoint is null'
    ) ENGINE=InnoDB ROW_FORMAT=COMPRESSED CHARACTER SET=utf8 COLLATE utf8_general_ci;
    
    ALTER TABLE zipkin_annotations ADD UNIQUE KEY(`trace_id_high`, `trace_id`, `span_id`, `a_key`, `a_timestamp`) COMMENT 'Ignore insert on duplicate';
    ALTER TABLE zipkin_annotations ADD INDEX(`trace_id_high`, `trace_id`, `span_id`) COMMENT 'for joining with zipkin_spans';
    ALTER TABLE zipkin_annotations ADD INDEX(`trace_id_high`, `trace_id`) COMMENT 'for getTraces/ByIds';
    ALTER TABLE zipkin_annotations ADD INDEX(`endpoint_service_name`) COMMENT 'for getTraces and getServiceNames';
    ALTER TABLE zipkin_annotations ADD INDEX(`a_type`) COMMENT 'for getTraces and autocomplete values';
    ALTER TABLE zipkin_annotations ADD INDEX(`a_key`) COMMENT 'for getTraces and autocomplete values';
    ALTER TABLE zipkin_annotations ADD INDEX(`trace_id`, `span_id`, `a_key`) COMMENT 'for dependencies job';
    
    CREATE TABLE IF NOT EXISTS zipkin_dependencies (
      `day` DATE NOT NULL,
      `parent` VARCHAR(255) NOT NULL,
      `child` VARCHAR(255) NOT NULL,
      `call_count` BIGINT,
      `error_count` BIGINT,
      PRIMARY KEY (`day`, `parent`, `child`)
    ) ENGINE=InnoDB ROW_FORMAT=COMPRESSED CHARACTER SET=utf8 COLLATE utf8_general_ci;

> zpkin : docker-compose.yml :

version: '2'
    
    services:
      # The zipkin process services the UI, and also exposes a POST endpoint that
      # instrumentation can send trace data to. Scribe is disabled by default.
      zipkin:
        image: openzipkin/zipkin
        container_name: zipkin
        environment:
          - STORAGE_TYPE=mysql
          # Point the zipkin at the storage backend
          - MYSQL_DB=zipkin
          - MYSQL_USER=root
          - MYSQL_PASS=123456
          - MYSQL_HOST=127.0.0.1
          - MYSQL_TCP_PORT=3306
          # Uncomment to enable scribe
          # - SCRIBE_ENABLED=true
          # Uncomment to enable self-tracing
          # - SELF_TRACING_ENABLED=true
          # Uncomment to enable debug logging
          # - JAVA_OPTS=-Dlogging.level.zipkin=DEBUG -Dlogging.level.zipkin2=DEBUG
        ports:
          # Port used for the Zipkin UI and HTTP Api
          - 9411:9411
          # Uncomment if you set SCRIBE_ENABLED=true
          # - 9410:9410
        #networks: 
        #  - default 
        #  - my_net #创建网路 docker network create my_net 删除网络 docker network rm my_net
    #networks: 
      #my_net: 
        #external: true

[opentracing]: https://github.com/opentracing-contrib/opentracing-specification-zh/blob/master/specification.md
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3MzA4MzIx_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200226114958884.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3MzA4MzIx,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3MzA4MzIx_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200226115011633.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3MzA4MzIx,size_16,color_FFFFFF,t_70
[20200226115023968.png]: https://img-blog.csdnimg.cn/20200226115023968.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3MzA4MzIx_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20200226115040822.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3MzA4MzIx,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3MzA4MzIx_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/20200226115056927.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE3MzA4MzIx,size_16,color_FFFFFF,t_70
[mysql.sql]: https://github.com/openzipkin/zipkin/blob/master/zipkin-storage/mysql-v1/src/main/resources/mysql.sql