canal简单使用
安装java环境
安装Zookeeper
- zookeeper-3.4.11.tar.gz
- 解压
tar -xzvf zookeeper-3.4.11.tar.gz - 放到opt目录
- 进入zookeeper目录
- 创建数据存储目录
midkr myZkData - 进入conf目录，
mv zoo_sample.cfg zoo.cfg vi zoo.cfg修改数据存储目录为自定义目录- 启动
zkServer.sh start - 测试
zkCli.sh
安装canal.admin-1.1.4
-
下载
canal.admin-1.1.4.tar.gz:https://github.com/alibaba/canal/releases -
下载完上传服务器opt目录
-
解压,需要制定目录:
tar -xzvf canal.admin-1.1.4.tar.gz -C canal.admin-1.1.4 -
创建数据库,在自己数据库执行sql脚本
/opt/canal.admin-1.1.4/conf/canal_manager.sql新建集群遇到了 Error[Column ‘modified_time’ cannot be null] 这个报错
解决办法:
ALTER TABLE canal_manager.canal_node_server MODIFY modified_time timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP; ALTER TABLE canal_manager.canal_adapter_config MODIFY modified_time timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP; ALTER TABLE canal_manager.canal_cluster MODIFY modified_time timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP; ALTER TABLE canal_manager.canal_config MODIFY modified_time timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP; ALTER TABLE canal_manager.canal_instance_config MODIFY modified_time timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP; ALTER TABLE canal_manager.canal_user MODIFY creation_date timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP; -
修改配置
/opt/canal.admin-1.1.4/conf/application.ymlmysql驱动使用的是mysql8驱动
需要替换/opt/canal.admin-1.1.4/lib里面mysql驱动，把mysql-connector-java-5.1.40.jar改成mysql-connector-java-8.0.18.jar
server: port: 8089 spring: jackson: date-format: yyyy-MM-dd HH:mm:ss time-zone: GMT+8 spring.datasource: address: 127.0.0.1:3306 database: canal_manager username: root password: 123456 driver-class-name: com.mysql.cj.jdbc.Driver url: jdbc:mysql://${spring.datasource.address}/${spring.datasource.database}?useUnicode=true&characterEncoding=UTF-8&useSSL=false hikari: maximum-pool-size: 30 minimum-idle: 1 canal: adminUser: admin adminPasswd: admin -
启动startup.sh,访问:http://127.0.0.1:8089/ admin/123456
安装canal.deployer-1.1.4
-
下载
canal.deployer-1.1.4.tar.gz:https://github.com/alibaba/canal/releases -
下载完上传服务器opt目录
-
解压,需要制定目录:
tar -xzvf canal.deployer-1.1.4.tar.gz -C canal.deployer-1.1.4 -
修改配置
/opt/canal.admin-1.1.4/conf使用
canal_local.properties替换canal.properties# register ip canal.register.ip = # canal admin config canal.admin.manager = 127.0.0.1:8089 canal.admin.port = 11110 canal.admin.user = admin canal.admin.passwd = 4ACFE3202A5FF5CF467898FC58AAB1D615029441 # admin auto register canal.admin.register.auto = true canal.admin.register.cluster = testcluster配置成了test，后面再ui上配一个集群叫test
-
mysql驱动使用的是mysql8驱动
-
启动startup.sh
-
被监控的数据库开启binlog
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创建cannal用户,在ui中创建instance时需要用到
grant SELECT, REPLICATION SLAVE, REPLICATION CLIENT on *.* to 'canal'@'%' identified by 'Canal@123456';会报错
com.alibaba.otter.canal.common.CanalException: load manager config failed. Caused by: com.alibaba.otter.canal.common.CanalException: requestGet for canal config error: canal.properties config is empty需要现在ui中创建集群，在集群中配置主文件
需要注释,并配置
canal.zkServers# canal.user = canal # canal.passwd = E3619321C1A937C46A0D8BD1DAC39F93B27D4458################################################# ######### common argument ############# ################################################# # tcp bind ip canal.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 = 127.0.0.1:2181 # 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 = # 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 = manager 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 = 127.0.0.1:6667 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"
#################################################
## mysql serverId , v1.0.26+ will autoGen
# canal.instance.mysql.slaveId=0
# enable gtid use true/false
canal.instance.gtidon=false
# position info
canal.instance.master.address=127.0.0.1:3306
canal.instance.master.journal.name=
canal.instance.master.position=
canal.instance.master.timestamp=
canal.instance.master.gtid=
# rds oss binlog
canal.instance.rds.accesskey=
canal.instance.rds.secretkey=
canal.instance.rds.instanceId=
# table meta tsdb info
canal.instance.tsdb.enable=true
#canal.instance.tsdb.url=jdbc:mysql://127.0.0.1:3306/canal_tsdb
#canal.instance.tsdb.dbUsername=canal
#canal.instance.tsdb.dbPassword=canal
#canal.instance.standby.address =
#canal.instance.standby.journal.name =
#canal.instance.standby.position =
#canal.instance.standby.timestamp =
#canal.instance.standby.gtid=
# username/password
canal.instance.dbUsername=canal
canal.instance.dbPassword=Canal@123456
canal.instance.connectionCharset = UTF-8
# enable druid Decrypt database password
canal.instance.enableDruid=false
#canal.instance.pwdPublicKey=MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBALK4BUxdDltRRE5/zXpVEVPUgunvscYFtEip3pmLlhrWpacX7y7GCMo2/JM6LeHmiiNdH1FWgGCpUfircSwlWKUCAwEAAQ==
# table regex
canal.instance.filter.regex=.*\\..*
# table black regex
canal.instance.filter.black.regex=
# table field filter(format: schema1.tableName1:field1/field2,schema2.tableName2:field1/field2)
#canal.instance.filter.field=test1.t_product:id/subject/keywords,test2.t_company:id/name/contact/ch
# table field black filter(format: schema1.tableName1:field1/field2,schema2.tableName2:field1/field2)
#canal.instance.filter.black.field=test1.t_product:subject/product_image,test2.t_company:id/name/contact/ch
# mq config
canal.mq.topic=
# dynamic topic route by schema or table regex
#canal.mq.dynamicTopic=mytest1.user,mytest2\\..*,.*\\..*
canal.mq.partition=0
# hash partition config
#canal.mq.partitionsNum=3
#canal.mq.partitionHash=test.table:id^name,.*\\..*
#################################################
集群搭建
- 创建zookeeper集群
- 创建多个canal.deployer
- 在ui中配置
客户端代码示例
<dependency>
<groupId>com.alibaba.ottergroupId>
<artifactId>canal.clientartifactId>
<version>1.1.4version>
dependency>
public class SimpleCanalClientExample {
public static void main(String args[]) {
// 创建链接
CanalConnector connector = CanalConnectors.newSingleConnector(new InetSocketAddress(AddressUtils.getHostIp(),
11111), "example", "", "");
int batchSize = 1000;
int emptyCount = 0;
try {
connector.connect();
connector.subscribe(".*\\..*");
connector.rollback();
int totalEmptyCount = 120;
while (emptyCount < totalEmptyCount) {
Message message = connector.getWithoutAck(batchSize); // 获取指定数量的数据
long batchId = message.getId();
int size = message.getEntries().size();
if (batchId == -1 || size == 0) {
emptyCount++;
System.out.println("empty count : " + emptyCount);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
}
} else {
emptyCount = 0;
// System.out.printf("message[batchId=%s,size=%s] \n", batchId, size);
printEntry(message.getEntries());
}
connector.ack(batchId); // 提交确认
// connector.rollback(batchId); // 处理失败, 回滚数据
}
System.out.println("empty too many times, exit");
} finally {
connector.disconnect();
}
}
private static void printEntry(List<Entry> entrys) {
for (Entry entry : entrys) {
if (entry.getEntryType() == EntryType.TRANSACTIONBEGIN || entry.getEntryType() == EntryType.TRANSACTIONEND) {
continue;
}
RowChange rowChage = null;
try {
rowChage = RowChange.parseFrom(entry.getStoreValue());
} catch (Exception e) {
throw new RuntimeException("ERROR ## parser of eromanga-event has an error , data:" + entry.toString(),
e);
}
EventType eventType = rowChage.getEventType();
System.out.println(String.format("================> binlog[%s:%s] , name[%s,%s] , eventType : %s",
entry.getHeader().getLogfileName(), entry.getHeader().getLogfileOffset(),
entry.getHeader().getSchemaName(), entry.getHeader().getTableName(),
eventType));
for (RowData rowData : rowChage.getRowDatasList()) {
if (eventType == EventType.DELETE) {
printColumn(rowData.getBeforeColumnsList());
} else if (eventType == EventType.INSERT) {
printColumn(rowData.getAfterColumnsList());
} else {
System.out.println("-------> before");
printColumn(rowData.getBeforeColumnsList());
System.out.println("-------> after");
printColumn(rowData.getAfterColumnsList());
}
}
}
}
private static void printColumn(List<Column> columns) {
for (Column column : columns) {
System.out.println(column.getName() + " : " + column.getValue() + " update=" + column.getUpdated());
}
}
}