对应版本： Mysql 5.7 Es 7.4 Canal 1.1.5

常见报错原因

https://blog.csdn.net/qq_24950043/article/details/122463372

下载如下：https://github.com/alibaba/canal/releases

修改deployer配置文件

上面配置过不需要配置

修改adapter配置文件

修改/conf/application.yml

server:
  port: 8081 #adapter 服务端口
spring:
  jackson:
    date-format: yyyy-MM-dd HH:mm:ss
    time-zone: GMT+8
    default-property-inclusion: non_null
canal.conf:
  mode: tcp # tcp - canal server读取模式, kafka rocketMQ
  flatMessage: true
  zookeeperHosts:  # adapter集群环境配置，主备锁。
  syncBatchSize: 1 #批处理条数
  retries: 0 #重试次数
  timeout:  #同步超时
  accessKey:
  secretKey:
  consumerProperties: # 消息服务消费端地址，根据mode读取
    # canal tcp consumer
    canal.tcp.server.host: {canalServer}:11111 # cancal地址
    canal.tcp.zookeeper.hosts: # 如果配置了canalServerHost, 则以canalServerHost为准
    canal.tcp.batch.size: 500
    canal.tcp.username:
    canal.tcp.password:
    # kafka consumer
    kafka.bootstrap.servers: 127.0.0.1:9092
    kafka.enable.auto.commit: false
    kafka.auto.commit.interval.ms: 1000
    kafka.auto.offset.reset: latest
    kafka.request.timeout.ms: 40000
    kafka.session.timeout.ms: 30000
    kafka.isolation.level: read_committed
    kafka.max.poll.records: 1000
    # rocketMQ consumer
    rocketmq.namespace:
    rocketmq.namesrv.addr: 127.0.0.1:9876
    rocketmq.batch.size: 1000
    rocketmq.enable.message.trace: false
    rocketmq.customized.trace.topic:
    rocketmq.access.channel:
    rocketmq.subscribe.filter:
    # rabbitMQ consumer
    rabbitmq.host:
    rabbitmq.virtual.host:
    rabbitmq.username:
    rabbitmq.password:
    rabbitmq.resource.ownerId:
 
  srcDataSources:
    defaultDS: #支持多数据源
      url: jdbc:mysql://{ip}:3306/test?useUnicode=true
      username: canal
      password: canal
  canalAdapters: # 同步适配器列表，同步到哪各数据源
  - instance: example # canal 实例名或者 MQ topic 名
    groups: # 适配器组，支持多个不同入库数据源
    - groupId: g1 # 分组id, 如果是MQ模式将用到该值
      outerAdapters: # 分组内适配器列表
      - name: logger # 打印获取到的消息数据日志
#      - name: rdb
#        key: mysql1
#        properties:
#          jdbc.driverClassName: com.mysql.jdbc.Driver
#          jdbc.url: jdbc:mysql://127.0.0.1:3306/mytest2?useUnicode=true
#          jdbc.username: root
#          jdbc.password: 121212
#      - name: rdb
#        key: oracle1
#        properties:
#          jdbc.driverClassName: oracle.jdbc.OracleDriver
#          jdbc.url: jdbc:oracle:thin:@localhost:49161:XE
#          jdbc.username: mytest
#          jdbc.password: m121212
#      - name: rdb
#        key: postgres1
#        properties:
#          jdbc.driverClassName: org.postgresql.Driver
#          jdbc.url: jdbc:postgresql://localhost:5432/postgres
#          jdbc.username: postgres
#          jdbc.password: 121212
#          threads: 1
#          commitSize: 3000
#      - name: hbase
#        properties:
#          hbase.zookeeper.quorum: 127.0.0.1
#          hbase.zookeeper.property.clientPort: 2181
#          zookeeper.znode.parent: /hbase
      - name: es7 #用于匹配Adapter，该名称对应数据源文件名称
        key: es-user #必须有key，否则是比es里面的配置
        hosts: {ip}:9300 # 127.0.0.1:9200 for rest mode
        properties:
          mode: transport # 9300对应transport or 9200对应rest
          # security.auth: test:123456 #  only used for rest mode
          cluster.name: elasticsearch
#        - name: kudu
#          key: kudu
#          properties:
#            kudu.master.address: 127.0.0.1 # ',' split multi address

配置数据源

修改yml文件

dataSourceKey: defaultDS #源数据源的key, 对应上面配置的srcDataSources中的值
outerAdapterKey: es-user # 对应application.yml中es配置的key
destination: example # cannal的instance或者MQ的topic
groupId: g1 # 对应MQ模式下的groupId, 只会同步对应groupId的数据
esMapping:
  _index: mytest_user # es 的索引名称
  _type: _doc # es 的type名称, es7下无需配置此项
  _id: id # es 的_id, 如果不配置该项必须配置下面的pk项_id则会由es自动分配
  upsert: true # 支持不存在新增操作
#  pk: id
  sql: "select t.id,t.username,t.phone from t_user t" #需要更新的所有字段都需写上
#  objFields:
#    _labels: array:; # 数组或者对象属性, array:; 代表以;字段里面是以;分隔的
  etlCondition: "where a.c_time>={}" # etl 的条件参数，通过服务的etl接口传入。

修改完成启动报错

 java.lang.ClassCastException: com.alibaba.druid.pool.DruidDataSource cannot be cast to com.alibaba.druid.pool.DruidDataSource

原因：common和escore的druid包冲突。

需要修改源码解决,打开刚刚下载的源码

1, 修改canal-canal-1.1.5\client-adapter\escore\pom.xml

2, 修改canal-canal-1.1.5\pom.xml

添加 true 主要是打包跳过测试，避免报错

		    <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>${maven-surefire.version}</version>
                <configuration>
                    <useSystemClassLoader>true</useSystemClassLoader>
                    <forkMode>once</forkMode>
                    <argLine>${argline} ${jacocoArgLine}</argLine>
                    <systemProperties>
                        <!-- common shared -->
                    </systemProperties>
                    <skipTests>true</skipTests>    <!--默认关掉单元测试 -->
                </configuration>
            </plugin>

Maven重新打包

执行完后用canal-canal-1.1.5\client-adapter\es7x\target\client-adapter.es7x-1.1.5-jar-with-dependencies.jar下面包替换conf/plugins/client-adapter.es7x-1.1.5-jar-with-dependencies.jar
之后重启

重启之后ES可能会报错。

NoNodeAvailableException[None of the configured nodes are available: 

修改ES的elasticsearch.yml文件：

注意：cluster.name 与 adapter下 /conf/application.yml文件的cluster.name名称相同