以nacos作为配置中心,分布式Springboot项目整合seata；SEATA、nacos、springboot、springcloud、openfeign

springCloud整合seata,以nacos作为配置中心

一. SEATA下载

https://github.com/apache/incubator-seata/releases/tag/v2.0.0

二. SEATA配置修改

1. seate->config->application.yml配置

server:
  port: 7091

spring:
  application:
    name: seata-server

logging:
  config: classpath:logback-spring.xml
  file:
    path: ${log.home:${user.home}/logs/seata}
  extend:
    logstash-appender:
      destination: 127.0.0.1:4560
    kafka-appender:
      bootstrap-servers: 127.0.0.1:9092
      topic: logback_to_logstash

console:
  user:
    username: seata
    password: seata
seata:
  config:
    type: nacos
    nacos:
      server-addr: 127.0.0.1:8848
      namespace: 6adbec40-7754-4fc1-88d7-1f9232c269e6
	  # seata的配置文件在nacos中都要使用这个分组
      group: SEATA_GROUP
      username: nacos
      password: nacos
      context-path:
	  # 存在nacos的seata数据库的配置文件
      data-id: seata.properties
  registry:
    type: nacos
    preferred-networks: 30.240.*
    nacos:
      application: seata-server
      server-addr: 127.0.0.1:8848
      group: SEATA_GROUP
      namespace: 6adbec40-7754-4fc1-88d7-1f9232c269e6
      cluster: default
      username: nacos
      password: nacos
      context-path:
      ##if use MSE Nacos with auth, mutex with username/password attribute
      #access-key:
      #secret-key:
  store:
    mode: file
  security:
    secretKey: SeataSecretKey0c382ef121d778043159209298fd40bf3850a017
    tokenValidityInMilliseconds: 1800000
    ignore:
      urls: /,/**/*.css,/**/*.js,/**/*.html,/**/*.map,/**/*.svg,/**/*.png,/**/*.jpeg,/**/*.ico,/api/v1/auth/login,/metadata/v1/**

2. 创建seata需要的数据库

3. 在各个TM（使用分布式事务的服务）新建undo_log表

CREATE TABLE `undo_log` (
  `id` BIGINT(20) NOT NULL AUTO_INCREMENT,
  `branch_id` BIGINT(20) NOT NULL,
  `xid` VARCHAR(100) NOT NULL,
  `context` VARCHAR(128) NOT NULL,
  `rollback_info` LONGBLOB NOT NULL,
  `log_status` INT(11) NOT NULL,
  `log_created` DATETIME NOT NULL,
  `log_modified` DATETIME NOT NULL,
  `ext` VARCHAR(100) DEFAULT NUL