一、目标：异库多库多表
实现不同数据库实例下，多个源数据库下多张表实时同步到多个目标数据库下多张表中。
canal实验版本：v1.1.4
1.1 canal组件资源分配
序号 canal组件 host ip 服务方式（serverMode） usage
1 canal.deployer cdh03 11111 tcp（push） 触发binlog生成
2 canal.adapter cdh05 8091（默认8081可能与flink的冲突） tcp（pull） 接收binlog，过滤出匹配的库表binlog并在落地库中replay
1.2 canal.adaptor中源、目标配置说明
序号 DB IP DB端口 db.tbl_name 作用
1 111.111.111.111 3306 rtdw_test_gmall.holiday_info 源库表，通过正则表达式订阅全库表binlog
2 222.222.222.222 3306 rtdw_test_gmall2.holiday_info 目标库表，通过tcp方式根据source订阅规则，读取数据落地至destination中
3 33.33.33.33 3306 rtdw_test_gmall3.region_info 源库表，通过正则表达式订阅全库表binlog
4 44.44.44.44 3306 rtdw_test_gmall4.region_info 目标库表，通过tcp方式根据source订阅规则，读取数据落地至destination中
二、canal server端
2.1 主配置文件
cd /data/canal.deployer-for-rdb-1.1.4/conf
canal.properties
#################################################
######### common argument #############
#################################################
# tcp bind ip
canal.ip = cdh03_ip
# register ip to zookeeper
canal.register.ip =
canal.port = 11111
canal.metrics.pull.port = 11112
# canal instance user/passwd
# canal.user = canal
# canal.passwd = E3619321C1A937C46A0D8BD1DAC39F93B27D4458
# canal admin config
#canal.admin.manager = 127.0.0.1:8089
canal.admin.port = 11110
canal.admin.user = admin
canal.admin.passwd = 4ACFE3202A5FF5CF467898FC58AAB1D615029441
canal.zkServers = cdh03:2181,cdh04:2181,cdh05:2181
# flush data to zk
canal.zookeeper.flush.period = 1000
canal.withoutNetty = false
# tcp, kafka, RocketMQ
canal.serverMode = tcp
# flush meta cursor/parse position to file
canal.file.data.dir = ${canal.conf.dir}
canal.file.flush.period = 1000
## memory store RingBuffer size, should be Math.pow(2,n)
canal.instance.memory.buffer.size = 16384
## memory store RingBuffer used memory unit size , default 1kb
canal.instance.memory.buffer.memunit = 1024
## meory store gets mode used MEMSIZE or ITEMSIZE
canal.instance.memory.batch.mode = MEMSIZE
canal.instance.memory.rawEntry = true
## detecing config
canal.instance.detecting.enable = false
#canal.instance.detecting.sql = insert into retl.xdual values(1,now()) on duplicate key update x=now()
canal.instance.detecting.sql = select 1
canal.instance.detecting.interval.time = 3
canal.instance.detecting.retry.threshold = 3
canal.instance.detecting.heartbeatHaEnable = false
# support maximum transaction size, more than the size of the transaction will be cut into multiple transactions delivery
canal.instance.transaction.size = 1024
# mysql fallback connected to new master should fallback times
canal.instance.fallbackIntervalInSeconds = 60
# network config
canal.instance.network.receiveBufferSize = 16384
canal.instance.network.sendBufferSize = 16384
canal.instance.network.soTimeout = 30
# binlog filter config
canal.instance.filter.druid.ddl = true
canal.instance.filter.query.dcl = false
canal.instance.filter.query.dml = false
canal.instance.filter.query.ddl = false
canal.instance.filter.table.error = false
canal.instance.filter.rows = false
canal.instance.filter.transaction.entry = false
# binlog format/image check
canal.instance.binlog.format = ROW,STATEMENT,MIXED
canal.instance.binlog.image = FULL,MINIMAL,NOBLOB
# binlog ddl isolation
canal.instance.get.ddl.isolation = false
# parallel parser config
canal.instance.parser.parallel = true
## concurrent thread number, default 60% available processors, suggest not to exceed Runtime.getRuntime().availableProcessors()
#canal.instance.parser.parallelThreadSize = 16
## disruptor ringbuffer size, must be power of 2
canal.instance.parser.parallelBufferSize = 256
# table meta tsdb info
canal.instance.tsdb.enable = true
canal.instance.tsdb.dir = ${canal.file.data.dir:../conf}/${canal.instance.destination:}
canal.instance.tsdb.url = jdbc:h2:${canal.instance.tsdb.dir}/h2;CACHE_SIZE=1000;MODE=MYSQL;
canal.instance.tsdb.dbUsername = canal
canal.instance.tsdb.dbPassword = canal
# dump snapshot interval, default 24 hour
canal.instance.tsdb.snapshot.interval = 24
# purge snapshot expire , default 360 hour(15 days)
canal.instance.tsdb.snapshot.expire = 360
# aliyun ak/sk , support rds/mq
canal.aliyun.accessKey =
canal.aliyun.secretKey =
#################################################
######### destinations #############
#################################################
canal.destinations = example,dest_db_2 # canal.adaptor在后续订阅此example【后续canal.adapter据此进行canal server端的服务发现】
# conf root dir
canal.conf.dir = ../conf
# auto scan instance dir add/remove and start/stop instance
canal.auto.scan = true
canal.auto.scan.interval = 5
canal.instance.tsdb.spring.xml = classpath:spring/tsdb/h2-tsdb.xml
#canal.instance.tsdb.spring.xml = classpath:spring/tsdb/mysql-tsdb.xml
canal.instance.global.mode = spring
canal.instance.global.lazy = false
canal.instance.global.manager.address = ${canal.admin.manager}
#canal.instance.global.spring.xml = classpath:spring/memory-instance.xml
canal.instance.global.spring.xml = classpath:spring/file-instance.xml
#canal.instance.global.spring.xml = classpath:spring/default-instance.xml
##################################################
######### MQ #############
##################################################
canal.mq.servers = cdh03:9092,cdh04:9092,cdh05:9092
canal.mq.retries = 0
canal.mq.batchSize = 16384
canal.mq.maxRequestSize = 1048576
canal.mq.lingerMs = 100
canal.mq.bufferMemory = 33554432
canal.mq.canalBatchSize = 50
canal.mq.canalGetTimeout = 100
canal.mq.flatMessage = true
canal.mq.compressionType = none
canal.mq.acks = all
#canal.mq.properties. =
canal.mq.producerGroup = test
# Set this value to "cloud", if you want open message trace feature in aliyun.
canal.mq.accessChannel = local
# aliyun mq namespace
#canal.mq.namespace =
##################################################
######### Kafka Kerberos Info #############
##################################################
canal.mq.kafka.kerberos.enable = false
canal.mq.kafka.kerberos.krb5FilePath = "../conf/kerberos/krb5.conf"
canal.mq.kafka.kerberos.jaasFilePath = "../conf/kerberos/jaas.conf"
注意这段配置：
canal.destinations = example,dest_db_2
2.1 子配置文件①
cd /data/canal.deployer-for-rdb-1.1.4/conf/example
注意：
该文件夹example 为deployer服务端 canal 实例名，需与canal.deployer中配置项“canal.destinations”的value保持严格一致。
instance.properties
1 #################################################
2 ## mysql serverId , v1.0.26+ will autoGen
3 canal.instance.mysql.slaveId=1234
4
5 # enable gtid use true/false
6 canal.instance.gtidon=false
7
8 # position info
9 canal.instance.master.address=111.111.111.111:3306 #待监听的源数据库ip+port
10 canal.instance.master.journal.name=
11 canal.instance.master.position=
12 canal.instance.master.timestamp=
13 canal.instance.master.gtid=
14
15 # rds oss binlog
16 canal.instance.rds.accesskey=
17 canal.instance.rds.secretkey=
18 canal.instance.rds.instanceId=
19
20 # table meta tsdb info
21 canal.instance.tsdb.enable=true
22 #canal.instance.tsdb.url=jdbc:mysql://127.0.0.1:3306/canal_tsdb
23 #canal.instance.tsdb.dbUsername=canal
24 #canal.instance.tsdb.dbPassword=canal
25
26 #canal.instance.standby.address =
27 #canal.instance.standby.journal.name =
28 #canal.instance.standby.position =
29 #canal.instance.standby.timestamp =
30 #canal.instance.standby.gtid=
31
32 # username/password
33 canal.instance.dbUsername=canal
34 canal.instance.dbPassword=canal
35 canal.instance.connectionCharset = UTF-8
36 # enable druid Decrypt database password
37 canal.instance.enableDruid=false
38 #canal.instance.pwdPublicKey=MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBALK4BUxdDltRRE5/zXpVEVPUgunvscYFtEip3pmLlhrWpacX7y7GCMo2/JM6LeHmiiNdH1FWgGCpUfircSwlWKUCAwEAAQ==
39
40 # table regex
41 #canal.instance.filter.regex=.*\\..*
42 canal.instance.filter.regex=rtdw_test_gmall\\..*
43 # table black regex
44 canal.instance.filter.black.regex=
45 # table field filter(format: schema1.tableName1:field1/field2,schema2.tableName2:field1/field2)
46 #canal.instance.filter.field=test1.t_product:id/subject/keywords,test2.t_company:id/name/contact/ch
47 # table field black filter(format: schema1.tableName1:field1/field2,schema2.tableName2:field1/field2)
48 #canal.instance.filter.black.field=test1.t_product:subject/product_image,test2.t_company:id/name/contact/ch
49
50 # mq config
51 canal.mq.topic=binlog_rtdw_test_gmall
52 # dynamic topic route by schema or table regex
53 #canal.mq.dynamicTopic=mytest1.user,mytest2\\..*,.*\\..*
54 canal.mq.partition=0
55 # hash partition config
56 #canal.mq.partitionsNum=3
57 #canal.mq.partitionHash=test.table:id^name,.*\\..*
58 #################################################
2.2 子配置文件②
cd /data/canal.deployer-for-rdb-1.1.4/conf/dest_db_2
注意：
该文件夹dest_db_2 为deployer服务端canal 实例名，需与canal.deployer中配置项“canal.destinations”的value保持严格一致。
instance.properties
1 #################################################
2 ## mysql serverId , v1.0.26+ will autoGen
3 canal.instance.mysql.slaveId=1234
4
5 # enable gtid use true/false
6 canal.instance.gtidon=false
7
8 # position info
9 canal.instance.master.address=33.33.33.33:3306 #待监听的源数据库ip+port
10 canal.instance.master.journal.name=
11 canal.instance.master.position=
12 canal.instance.master.timestamp=
13 canal.instance.master.gtid=
14
15 # rds oss binlog
16 canal.instance.rds.accesskey=
17 canal.instance.rds.secretkey=
18 canal.instance.rds.instanceId=
19
20 # table meta tsdb info
21 canal.instance.tsdb.enable=true
22 #canal.instance.tsdb.url=jdbc:mysql://127.0.0.1:3306/canal_tsdb
23 #canal.instance.tsdb.dbUsername=canal
24 #canal.instance.tsdb.dbPassword=canal
25
26 #canal.instance.standby.address =
27 #canal.instance.standby.journal.name =
28 #canal.instance.standby.position =
29 #canal.instance.standby.timestamp =
30 #canal.instance.standby.gtid=
31
32 # username/password
33 canal.instance.dbUsername=canal
34 canal.instance.dbPassword=canal
35 canal.instance.connectionCharset = UTF-8
36 # enable druid Decrypt database password
37 canal.instance.enableDruid=false
38 #canal.instance.pwdPublicKey=MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBALK4BUxdDltRRE5/zXpVEVPUgunvscYFtEip3pmLlhrWpacX7y7GCMo2/JM6LeHmiiNdH1FWgGCpUfircSwlWKUCAwEAAQ==
39
40 # table regex
41 #canal.instance.filter.regex=.*\\..*
42 canal.instance.filter.regex=rtdw_test_gmall3\\..*
43 # table black regex
44 canal.instance.filter.black.regex=
45 # table field filter(format: schema1.tableName1:field1/field2,schema2.tableName2:field1/field2)
46 #canal.instance.filter.field=test1.t_product:id/subject/keywords,test2.t_company:id/name/contact/ch
47 # table field black filter(format: schema1.tableName1:field1/field2,schema2.tableName2:field1/field2)
48 #canal.instance.filter.black.field=test1.t_product:subject/product_image,test2.t_company:id/name/contact/ch
49
50 # mq config
51 canal.mq.topic=binlog_rtdw_test_gmall3
52 # dynamic topic route by schema or table regex
53 #canal.mq.dynamicTopic=mytest1.user,mytest2\\..*,.*\\..*
54 canal.mq.partition=0
55 # hash partition config
56 #canal.mq.partitionsNum=3
57 #canal.mq.partitionHash=test.table:id^name,.*\\..*
58 #################################################
三、canal adaptor端
3.1 主配置文件
cd /data/canal.adapter-1.1.4/conf
application.yml
server:
port: 8091
spring:
jackson:
date-format: yyyy-MM-dd HH:mm:ss
time-zone: GMT+8
default-property-inclusion: non_null
canal.conf:
mode: tcp # tcp方式监听DBMS binlog变化，其他可选项：kafka rocketMQ
canalServerHost: cdh03_ip:11111
# zookeeperHosts: slave1:2181
# mqServers: 127.0.0.1:9092 #or rocketmq
# flatMessage: true
batchSize: 500
syncBatchSize: 1000
retries: 0
timeout:
accessKey:
secretKey:
srcDataSources: # Mysql source address
myDS1:
url: jdbc:mysql://111.111.111.111:3306/rtdw_test_gmall?useUnicode=true # 源库
username: root1
password: password1
myDS2:
url: jdbc:mysql://33.33.33.33:3306/rtdw_test_gmall3?useUnicode=true # 源库
username: root3
password: password3
canalAdapters: # 列表格式
- instance: example # canal instance Name or mq topic name:【实例名，需与canal.deployer中配置项“canal.destinations”的value保持严格一致】
groups:
- groupId: g1 #组ID
outerAdapters:
- name: logger
- name: rdb
key: mysql1 #后续根据此key进行溯源
properties:
jdbc.driverClassName: com.mysql.jdbc.Driver
jdbc.url: jdbc:mysql://222.222.222.222:3306/rtdw_test_gmall2?useUnicode=true
jdbc.username: root2
jdbc.password: password2
- instance: dest_db_2 # canal instance Name or mq topic name:【实例名，需与canal.deployer中配置项“canal.destinations”的value保持严格一致】
groups:
- groupId: g2 #组ID
outerAdapters:
- name: logger
- name: rdb
key: mysql2 #后续根据此key进行溯源
properties:
jdbc.driverClassName: com.mysql.jdbc.Driver
jdbc.url: jdbc:mysql://44.44.44.44:3306/rtdw_test_gmall4?useUnicode=true
jdbc.username: root4
jdbc.password: password4
注意：
1、这里 canalAdapters 是个列表，下可以配置多个instance
2、多个instance配置成一模一样，canal.adapter组件也不会报错，但没有意义。有多个数据源，请配置不同的instance、groupId、key，以区分不同的映射。
3、srcDataSources为源库信息，canalAdapters.instance 为目标库的配置。
4、此例中，共有2对输入输出映射，下面的rdb配置文件中将引用此进行排列组合：
①、源数据库：myDS1（rtdw_test_gmall） ----> 目标数据库：222.222.222.222:3306/rtdw_test_gmall2，canal实例通道：example
②、源数据库：myDS2（rtdw_test_gmall3） ----> 目标数据库：44.44.44.44:3306/rtdw_test_gmall4，canal实例通道：dest_db_2
3.2 rdb子配置文件
adapter模块是通过热加载rdb⽬录下的yml配置⽂件来做到同步数据到指定数据库的目的，所以这块需要引用此前主配置文件中定义的canal服务端信息 和 数据源信息。
cd /data/canal.adapter-1.1.4/conf/rdb/
test4_holiday_info.yml
dataSourceKey: myDS1
destination: example #【实例名，需与canal.deployer中配置项“canal.destinations”的value保持严格一致】
groupId: g1
outerAdapterKey: mysql1
concurrent: true
dbMapping:
database: rtdw_test_gmall
table: holiday_info
targetTable: rtdw_test_gmall2.holiday_info
targetPk:
holiday_id: holiday_id
mapAll: true
test5_base_region.yml
dataSourceKey: myDS1
destination: example #【实例名，需与canal.deployer中配置项“canal.destinations”的value保持严格一致】
groupId: g1
outerAdapterKey: mysql1
concurrent: true
dbMapping:
database: rtdw_test_gmall
table: base_region
targetTable: rtdw_test_gmall2.base_region
targetPk:
id: id
mapAll: true
test6_order_detail.yml
dataSourceKey: myDS2
destination: dest_db_2 #【实例名，需与canal.deployer中配置项“canal.destinations”的value保持严格一致】
groupId: g2
outerAdapterKey: mysql2
concurrent: true
dbMapping:
database: rtdw_test_gmall3
table: delivery
targetTable: rtdw_test_gmall4.order_detail
targetPk:
id: id
mapAll: true
由如上“联合主键” （dataSourceKey + destination + groupId + outerAdapterKey） ，将可以查到目标数据库url分别为：
jdbc:mysql://222.222.222.222:3306/rtdw_test_gmall2?useUnicode=true
jdbc:mysql://44.44.44.44:3306/rtdw_test_gmall4?useUnicode=true
四、canal.adapter配置加载日志输出
2022-06-15 11:32:36.523 [main] INFO c.a.o.canal.adapter.launcher.loader.CanalAdapterService - ## start the canal client adapters.
2022-06-15 11:32:36.527 [main] INFO c.a.otter.canal.client.adapter.support.Extensi============> Start to connect destination: example <=============
2022-06-15 11:32:36.970 [main] INFO c.a.otter.canal.client.adapter.rdb.config.ConfigLoader - ## Rdb mapping config loaded
2022-06-15 11:32:36.998 [main] INFO com.alibaba.druid.pool.DruidDataSource - {dataSource-4} inited
2022-06-15 11:32:36.998 [main] INFO c.a.o.canal.adapter.launcher.loader.CanalAdapterLoader - Load canal adapter: rdb succeed
2022-06-15 11:32:36.998 [main] INFO c.a.o.canal.adapter.launcher.loader.CanalAdapterLoader - Start adapter for canal instance: dest_db_2 succeed
2022-06-15 11:32:36.998 [main] INFO c.a.o.canal.adapter.launcher.loader.CanalAdapterService - ## the canal client adapters are running now ......
2022-06-15 11:32:37.006 [main] INFO org.apache.coyote.http11.Http11NioProtocol - Starting ProtocolHandler ["http-nio-8091"]
2022-06-15 11:32:37.008 [Thread-6] INFO c.a.o.canal.adapter.launcher.loader.CanalAdapterWorker - =============> Start to connect destination: dest_db_2 <=============
2022-06-15 11:32:37.020 [main] INFO org.apache.tomcat.util.net.NioSelectorPool - Using a shared selector for servlet write/read
2022-06-15 11:32:37.078 [Thread-4] INFO c.a.o.canal.adapter.launcher.loader.CanalAdapterWorker - =============> Start to subscribe destination: example <=============
2022-06-15 11:32:37.079 [Thread-6] INFO c.a.o.canal.adapter.launcher.loader.CanalAdapterWorker - =============> Start to subscribe destination: dest_db_2 <=============
2022-06-15 11:32:37.092 [main] INFO o.s.boot.web.embedded.tomcat.TomcatWebServer - Tomcat started on port(s): 8091 (http) with context path ''
2022-06-15 11:32:37.109 [main] INFO c.a.otter.canal.adapter.launcher.CanalAdapterApplication - Started CanalAdapterApplication in 6.292 seconds (JVM running for 10.008)
2022-06-15 11:32:37.119 [Thread-4] INFO c.a.o.canal.adapter.launcher.loader.CanalAdapterWorker - =============> Subscribe destination: example succeed <=============
2022-06-15 11:32:37.122 [Thread-6] INFO c.a.o.canal.adapter.launcher.loader.CanalAdapterWorker - =============> Subscribe destination: dest_db_2 succeed <=============
五、注意事项
1、canal.adapter进程运行时修改“outerAdapterKey”配置项时报如下错，修改完记得重启adapter进程
Outer adapter key not allowed modify
2022-06-16 15:13:09.501 [Thread-17] ERROR c.a.o.canal.client.adapter.rdb.monitor.RdbConfigMonitor - Outer adapter key not allowed modify
java.lang.RuntimeException: Outer adapter key not allowed modify
at com.alibaba.otter.canal.client.adapter.rdb.monitor.RdbConfigMonitor$FileListener.onFileChange(RdbConfigMonitor.java:115)
at org.apache.commons.io.monitor.FileAlterationObserver.doMatch(FileAlterationObserver.java:400)
at org.apache.commons.io.monitor.FileAlterationObserver.checkAndNotify(FileAlterationObserver.java:334)
at org.apache.commons.io.monitor.FileAlterationObserver.checkAndNotify(FileAlterationObserver.java:304)
at org.apache.commons.io.monitor.FileAlterationMonitor.run(FileAlterationMonitor.java:182)
at java.lang.Thread.run(Thread.java:745)
参考列表：
注意：本文归作者所有，未经作者允许，不得转载
