go微服務框架kratos學習筆記九(kratos 全鏈路追蹤 zipkin)

目錄

• go微服務框架kratos學習筆記九(kratos 全鏈路追蹤 zipkin)
  • zipkin使用demo
  • 數據持久化

---

當代的互聯網的服務，通常都是用復雜的、大規模分布式集群來實現的。互聯網應用構建在不同的軟件模塊集上，這些軟件模塊，有可能是由不同的團隊開發、可能使用不同的編程語言來實現、有可能布在了幾千台服務器，橫跨多個不同的數據中心。因此，就需要一些可以幫助理解系統行為、用於分析性能問題的工具。

本節簡單搭建一下zipkin，zipkin是Twitter基於google的分布式監控系統Dapper（論文）的開發源實現，zipkin用於跟蹤分布式服務之間的應用數據鏈路，分析處理延時，幫助我們改進系統的性能和定位故障。

同時kratos基於opentracing語義，可以將zipkin集成了進去

搭建 Zipkin ，啟動一個zipkin服務，最簡單的辦法是直接使用 Zipkin 官方的 Docker 鏡像。

如果只是為了測試用，可以pull 下來直接啟動一個，數據會在內存里面，我這里docker pull需要FQ.

啟動zipkin

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

127..0.0.1:9411查看

zipkin使用demo

照慣例new 一個demo 服務

在main函數內進行初始化，添加如下代碼：

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

調用一下sayhello接口

再看看zipkin 是否有數據

數據持久化

生產環境中，可能會需要做數據的持久化，官方提供了很多支持，這里舉例mysql、同樣docker運行一份mysql服務。

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

官方建表語句 : 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 #創建網路 docker network create my_net 刪除網絡 docker network rm my_net
#networks: 
  #my_net: 
    #external: true