flink cdc MySQL2Doris 案例分享解决分库多表同步

案例简单说明

使用flink cdc，完成mysql 多库多表同时同步到doris中

版本信息

flink 1.14.4

doris 1.1.0

依赖

 <properties><maven.compiler.source>8</maven.compiler.source><maven.compiler.target>8</maven.compiler.target><scala.version>2.12</scala.version><java.version>1.8</java.version><flink.version>1.14.4</flink.version><fastjson.version>1.2.62</fastjson.version><hadoop.version>2.8.3</hadoop.version><scope.mode>compile</scope.mode><slf4j.version>1.7.30</slf4j.version></properties><dependencies><dependency><groupId>org.apache.flink</groupId><artifactId>flink-table-api-scala-bridge_${scala.version}</artifactId><version>${flink.version}</version></dependency><dependency><groupId>org.apache.flink</groupId><artifactId>flink-table-planner_${scala.version}</artifactId><version>${flink.version}</version></dependency><dependency><groupId>org.apache.flink</groupId><artifactId>flink-streaming-scala_${scala.version}</artifactId><version>${flink.version}</version></dependency><dependency><groupId>org.apache.flink</groupId><artifactId>flink-clients_${scala.version}</artifactId><version>${flink.version}</version></dependency><dependency><groupId>org.apache.flink</groupId><artifactId>flink-connector-jdbc_${scala.version}</artifactId><version>${flink.version}</version></dependency><dependency><groupId>org.apache.flink</groupId><artifactId>flink-connector-kafka_${scala.version}</artifactId><version>${flink.version}</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>${fastjson.version}</version></dependency><!-- Add log dependencies when debugging locally --><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-api</artifactId><version>${slf4j.version}</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId><version>${slf4j.version}</version></dependency><!-- flink-doris-connector --><dependency><groupId>org.apache.doris</groupId><artifactId>flink-doris-connector-1.14_2.12</artifactId><version>1.1.0</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.12</version></dependency><dependency><groupId>com.ververica</groupId><artifactId>flink-connector-mysql-cdc</artifactId><version>2.2.0</version><exclusions><exclusion><artifactId>flink-shaded-guava</artifactId><groupId>org.apache.flink</groupId></exclusion></exclusions></dependency><dependency><groupId>org.apache.flink</groupId><artifactId>flink-runtime-web_${scala.version}</artifactId><version>${flink.version}</version></dependency></dependencies><build><plugins><plugin><groupId>net.alchim31.maven</groupId><artifactId>scala-maven-plugin</artifactId><version>3.2.1</version><executions><execution><id>scala-compile-first</id><phase>process-resources</phase><goals><goal>compile</goal></goals></execution><execution><id>scala-test-compile</id><phase>process-test-resources</phase><goals><goal>testCompile</goal></goals></execution></executions><configuration><args><arg>-feature</arg></args></configuration></plugin><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>3.8.1</version><configuration><source>8</source><target>8</target></configuration></plugin></plugins></build>

flink-connector-mysql-cdc 2.2.1版本一直会报异常

java.lang.NoClassDefFoundError: org/apache/flink/shaded/guava18/com/google/common/util/concurrent/ThreadFactoryBuilder

从官网下载依赖，然后本地添加进去flink-sql-connector-mysql-cdc-2.2.0

准备mysql数据

CREATE DATABASE emp_1;USE emp_1;
CREATE TABLE employees_1 (emp_no      INT             NOT NULL,birth_date  DATE            NOT NULL,first_name  VARCHAR(14)     NOT NULL,last_name   VARCHAR(16)     NOT NULL,gender      ENUM ('M','F')  NOT NULL,    hire_date   DATE            NOT NULL,PRIMARY KEY (emp_no)
);INSERT INTO `employees_1` VALUES (10001,'1953-09-02','Georgi','Facello','M','1986-06-26'),
(10002,'1964-06-02','Bezalel','Simmel','F','1985-11-21'),
(10003,'1959-12-03','Parto','Bamford','M','1986-08-28'),
(10004,'1954-05-01','Chirstian','Koblick','M','1986-12-01'),
(10005,'1955-01-21','Kyoichi','Maliniak','M','1989-09-12'),
(10006,'1953-04-20','Anneke','Preusig','F','1989-06-02'),
(10007,'1957-05-23','Tzvetan','Zielinski','F','1989-02-10'),
(10008,'1958-02-19','Saniya','Kalloufi','M','1994-09-15'),
(10009,'1952-04-19','Sumant','Peac','F','1985-02-18'),
(10010,'1963-06-01','Duangkaew','Piveteau','F','1989-08-24'),
(10011,'1953-11-07','Mary','Sluis','F','1990-01-22'),
(10012,'1960-10-04','Patricio','Bridgland','M','1992-12-18'),
(10013,'1963-06-07','Eberhardt','Terkki','M','1985-10-20'),
(10014,'1956-02-12','Berni','Genin','M','1987-03-11'),
(10015,'1959-08-19','Guoxiang','Nooteboom','M','1987-07-02'),
(10016,'1961-05-02','Kazuhito','Cappelletti','M','1995-01-27'),
(10017,'1958-07-06','Cristinel','Bouloucos','F','1993-08-03'),
(10018,'1954-06-19','Kazuhide','Peha','F','1987-04-03'),
(10019,'1953-01-23','Lillian','Haddadi','M','1999-04-30'),
(10020,'1952-12-24','Mayuko','Warwick','M','1991-01-26'),
(10021,'1960-02-20','Ramzi','Erde','M','1988-02-10'),
(10022,'1952-07-08','Shahaf','Famili','M','1995-08-22'),
(10023,'1953-09-29','Bojan','Montemayor','F','1989-12-17'),
(10024,'1958-09-05','Suzette','Pettey','F','1997-05-19'),
(10025,'1958-10-31','Prasadram','Heyers','M','1987-08-17'),
(10026,'1953-04-03','Yongqiao','Berztiss','M','1995-03-20'),
(10027,'1962-07-10','Divier','Reistad','F','1989-07-07'),
(10028,'1963-11-26','Domenick','Tempesti','M','1991-10-22'),
(10029,'1956-12-13','Otmar','Herbst','M','1985-11-20'),
(10030,'1958-07-14','Elvis','Demeyer','M','1994-02-17'),
(10031,'1959-01-27','Karsten','Joslin','M','1991-09-01'),
(10032,'1960-08-09','Jeong','Reistad','F','1990-06-20'),
(10033,'1956-11-14','Arif','Merlo','M','1987-03-18'),
(10034,'1962-12-29','Bader','Swan','M','1988-09-21'),
(10035,'1953-02-08','Alain','Chappelet','M','1988-09-05'),
(10036,'1959-08-10','Adamantios','Portugali','M','1992-01-03');CREATE TABLE employees_2 (emp_no      INT             NOT NULL,birth_date  DATE            NOT NULL,first_name  VARCHAR(14)     NOT NULL,last_name   VARCHAR(16)     NOT NULL,gender      ENUM ('M','F')  NOT NULL,    hire_date   DATE            NOT NULL,PRIMARY KEY (emp_no)
);INSERT INTO `employees_2` VALUES (10037,'1963-07-22','Pradeep','Makrucki','M','1990-12-05'),
(10038,'1960-07-20','Huan','Lortz','M','1989-09-20'),
(10039,'1959-10-01','Alejandro','Brender','M','1988-01-19'),
(10040,'1959-09-13','Weiyi','Meriste','F','1993-02-14'),
(10041,'1959-08-27','Uri','Lenart','F','1989-11-12'),
(10042,'1956-02-26','Magy','Stamatiou','F','1993-03-21'),
(10043,'1960-09-19','Yishay','Tzvieli','M','1990-10-20'),
(10044,'1961-09-21','Mingsen','Casley','F','1994-05-21'),
(10045,'1957-08-14','Moss','Shanbhogue','M','1989-09-02'),
(10046,'1960-07-23','Lucien','Rosenbaum','M','1992-06-20'),
(10047,'1952-06-29','Zvonko','Nyanchama','M','1989-03-31'),
(10048,'1963-07-11','Florian','Syrotiuk','M','1985-02-24'),
(10049,'1961-04-24','Basil','Tramer','F','1992-05-04'),
(10050,'1958-05-21','Yinghua','Dredge','M','1990-12-25'),
(10051,'1953-07-28','Hidefumi','Caine','M','1992-10-15'),
(10052,'1961-02-26','Heping','Nitsch','M','1988-05-21'),
(10053,'1954-09-13','Sanjiv','Zschoche','F','1986-02-04'),
(10054,'1957-04-04','Mayumi','Schueller','M','1995-03-13');CREATE DATABASE emp_2;USE emp_2;CREATE TABLE employees_1 (emp_no      INT             NOT NULL,birth_date  DATE            NOT NULL,first_name  VARCHAR(14)     NOT NULL,last_name   VARCHAR(16)     NOT NULL,gender      ENUM ('M','F')  NOT NULL,    hire_date   DATE            NOT NULL,PRIMARY KEY (emp_no)
);INSERT INTO `employees_1` VALUES  (10055,'1956-06-06','Georgy','Dredge','M','1992-04-27'),
(10056,'1961-09-01','Brendon','Bernini','F','1990-02-01'),
(10057,'1954-05-30','Ebbe','Callaway','F','1992-01-15'),
(10058,'1954-10-01','Berhard','McFarlin','M','1987-04-13'),
(10059,'1953-09-19','Alejandro','McAlpine','F','1991-06-26'),
(10060,'1961-10-15','Breannda','Billingsley','M','1987-11-02'),
(10061,'1962-10-19','Tse','Herber','M','1985-09-17'),
(10062,'1961-11-02','Anoosh','Peyn','M','1991-08-30'),
(10063,'1952-08-06','Gino','Leonhardt','F','1989-04-08'),
(10064,'1959-04-07','Udi','Jansch','M','1985-11-20'),
(10065,'1963-04-14','Satosi','Awdeh','M','1988-05-18'),
(10066,'1952-11-13','Kwee','Schusler','M','1986-02-26'),
(10067,'1953-01-07','Claudi','Stavenow','M','1987-03-04'),
(10068,'1962-11-26','Charlene','Brattka','M','1987-08-07'),
(10069,'1960-09-06','Margareta','Bierman','F','1989-11-05'),
(10070,'1955-08-20','Reuven','Garigliano','M','1985-10-14'),
(10071,'1958-01-21','Hisao','Lipner','M','1987-10-01'),
(10072,'1952-05-15','Hironoby','Sidou','F','1988-07-21'),
(10073,'1954-02-23','Shir','McClurg','M','1991-12-01'),
(10074,'1955-08-28','Mokhtar','Bernatsky','F','1990-08-13'),
(10075,'1960-03-09','Gao','Dolinsky','F','1987-03-19'),
(10076,'1952-06-13','Erez','Ritzmann','F','1985-07-09'),
(10077,'1964-04-18','Mona','Azuma','M','1990-03-02'),
(10078,'1959-12-25','Danel','Mondadori','F','1987-05-26'),
(10079,'1961-10-05','Kshitij','Gils','F','1986-03-27'),
(10080,'1957-12-03','Premal','Baek','M','1985-11-19'),
(10081,'1960-12-17','Zhongwei','Rosen','M','1986-10-30'),
(10082,'1963-09-09','Parviz','Lortz','M','1990-01-03'),
(10083,'1959-07-23','Vishv','Zockler','M','1987-03-31'),
(10084,'1960-05-25','Tuval','Kalloufi','M','1995-12-15');CREATE TABLE employees_2(emp_no      INT             NOT NULL,birth_date  DATE            NOT NULL,first_name  VARCHAR(14)     NOT NULL,last_name   VARCHAR(16)     NOT NULL,gender      ENUM ('M','F')  NOT NULL,    hire_date   DATE            NOT NULL,PRIMARY KEY (emp_no)
);INSERT INTO `employees_2` VALUES (10085,'1962-11-07','Kenroku','Malabarba','M','1994-04-09'),
(10086,'1962-11-19','Somnath','Foote','M','1990-02-16'),
(10087,'1959-07-23','Xinglin','Eugenio','F','1986-09-08'),
(10088,'1954-02-25','Jungsoon','Syrzycki','F','1988-09-02'),
(10089,'1963-03-21','Sudharsan','Flasterstein','F','1986-08-12'),
(10090,'1961-05-30','Kendra','Hofting','M','1986-03-14'),
(10091,'1955-10-04','Amabile','Gomatam','M','1992-11-18'),
(10092,'1964-10-18','Valdiodio','Niizuma','F','1989-09-22'),
(10093,'1964-06-11','Sailaja','Desikan','M','1996-11-05'),
(10094,'1957-05-25','Arumugam','Ossenbruggen','F','1987-04-18'),
(10095,'1965-01-03','Hilari','Morton','M','1986-07-15'),
(10096,'1954-09-16','Jayson','Mandell','M','1990-01-14'),
(10097,'1952-02-27','Remzi','Waschkowski','M','1990-09-15'),
(10098,'1961-09-23','Sreekrishna','Servieres','F','1985-05-13'),
(10099,'1956-05-25','Valter','Sullins','F','1988-10-18'),
(10100,'1953-04-21','Hironobu','Haraldson','F','1987-09-21'),
(10101,'1952-04-15','Perla','Heyers','F','1992-12-28'),
(10102,'1959-11-04','Paraskevi','Luby','F','1994-01-26'),
(10103,'1953-11-26','Akemi','Birch','M','1986-12-02'),
(10104,'1961-11-19','Xinyu','Warwick','M','1987-04-16'),
(10105,'1962-02-05','Hironoby','Piveteau','M','1999-03-23'),
(10106,'1952-08-29','Eben','Aingworth','M','1990-12-19'),
(10107,'1956-06-13','Dung','Baca','F','1994-03-22'),
(10108,'1952-04-07','Lunjin','Giveon','M','1986-10-02'),
(10109,'1958-11-25','Mariusz','Prampolini','F','1993-06-16'),
(10110,'1957-03-07','Xuejia','Ullian','F','1986-08-22'),
(10111,'1963-08-29','Hugo','Rosis','F','1988-06-19'),
(10112,'1963-08-13','Yuichiro','Swick','F','1985-10-08'),
(10113,'1963-11-13','Jaewon','Syrzycki','M','1989-12-24'),
(10114,'1957-02-16','Munir','Demeyer','F','1992-07-17'),
(10115,'1964-12-25','Chikara','Rissland','M','1986-01-23'),
(10116,'1955-08-26','Dayanand','Czap','F','1985-05-28');

准备doris表

create database test_db;
use test_db;
CREATE TABLE all_employees_info (emp_no       int NOT NULL,birth_date   date,first_name   varchar(20),last_name    varchar(20),gender       char(2),hire_date    date,database_name varchar(50),table_name    varchar(200)
)
UNIQUE KEY(`emp_no`, `birth_date`)
DISTRIBUTED BY HASH(`birth_date`) BUCKETS 1
PROPERTIES (
"replication_allocation" = "tag.location.default: 1"
);

由于 UNIQUE KEY(emp_no, birth_date)，因此update mysql这两个字段的时候，doris 会多一条数据

代码案例

final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();env.enableCheckpointing(10000);env.setParallelism(1);final StreamTableEnvironment tEnv = StreamTableEnvironment.create(env);// register a table in the catalogtEnv.executeSql("CREATE TABLE cdc_test_source (\n" +"  emp_no INT,\n" +"  birth_date DATE,\n" +"  first_name STRING,\n" +"  last_name STRING,\n" +"  gender STRING,\n" +"  hire_date  STRING,\n" +"  database_name STRING METADATA VIRTUAL,\n" +"  table_name STRING METADATA VIRTUAL,\n" +"  PRIMARY KEY (`emp_no`) NOT ENFORCED  \n" +") WITH (\n" +"  'connector' = 'mysql-cdc',\n" +"  'hostname' = '192.168.22.xxx',\n" +"  'port' = '3306',\n" +"  'username' = 'xxx',\n" +"  'password' = 'xxx',\n" +"  'database-name' = 'emp_[0-9]+',\n" +"  'table-name' = 'employees_[0-9]+'\n" +")");String label = UUID.randomUUID();//doris tabletEnv.executeSql("CREATE TABLE doris_test_sink (" +"  emp_no INT,\n" +"  birth_date STRING,\n" +"  first_name STRING,\n" +"  last_name STRING,\n" +"  gender STRING,\n" +"  hire_date  STRING\n" +") " +"WITH (\n" +"  'connector' = 'doris',\n" +"  'fenodes' = '172.8.10.xxx:8030',\n" +"  'table.identifier' = 'test_db.all_employees_info',\n" +"  'username' = 'xxx',\n" +"  'password' = 'xxx',\n" +/* doris stream load label, In the exactly-once scenario,the label is globally unique and must be restarted from the latest checkpoint when restarting.Exactly-once semantics can be turned off via sink.enable-2pc. */"  'sink.label-prefix' ='" + label + "',\n" +"  'sink.properties.format' = 'json',\n" +       //json data format"  'sink.properties.read_json_by_line' = 'true'\n" +")");//insert into mysql table to doris tabletEnv.executeSql("INSERT INTO doris_test_sink select emp_no,cast(birth_date as string) as birth_date ,first_name,last_name,gender,cast(hire_date as string) as hire_date   from cdc_test_source ");

执行之后可以再插入、更新一些数据，进行验证

补充

多库多表在于

" ‘database-name’ = ‘emp_[0-9]+’,\n" +
" ‘table-name’ = ‘employees_[0-9]+’\n" +

使用正则，可以自动匹配上

库、表的名字在于
" database_name STRING METADATA VIRTUAL,\n" +
" table_name STRING METADATA VIRTUAL,\n" +
如果没写，是读取不到mysql数据中库、表的名字的

Doris 和 Flink 列类型映射关系可以查看官网信息

Flink Doris Connector - Apache Doris