Canal实现MYSQL实时数据同步的示例代码
作者：水蓝烟雨
本文详细介绍了Canal部署的全过程,包括Canal-Admin、Canal-Server和Canal-Adapter的安装和配置,涵盖创建目录、修改配置文件、容器部署等步骤,适用于MYSQL8.0+环境,旨在帮助用户实现MYSQL实时数据同步
部署Canal-Admin
1. 拉取Canal-Admin镜像
为了兼容MYSQL8.0+， 我们需要拉取 v1.1.7的镜像
docker pull canal/canal-admin:v1.1.7
2. 创建目录
mkdir -p /data/canal-server/conf/
3. 创建canal_manager数据库
CREATE DATABASE /*!32312 IF NOT EXISTS*/ `canal_manager` /*!40100 DEFAULT CHARACTER SET utf8 COLLATE utf8_bin */; USE `canal_manager`; SET NAMES utf8; SET FOREIGN_KEY_CHECKS = 0; -- ---------------------------- -- Table structure for canal_adapter_config -- ---------------------------- DROP TABLE IF EXISTS `canal_adapter_config`; CREATE TABLE `canal_adapter_config` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `category` varchar(45) NOT NULL, `name` varchar(45) NOT NULL, `status` varchar(45) DEFAULT NULL, `content` text NOT NULL, `modified_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; -- ---------------------------- -- Table structure for canal_cluster -- ---------------------------- DROP TABLE IF EXISTS `canal_cluster`; CREATE TABLE `canal_cluster` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `name` varchar(63) NOT NULL, `zk_hosts` varchar(255) NOT NULL, `modified_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; -- ---------------------------- -- Table structure for canal_config -- ---------------------------- DROP TABLE IF EXISTS `canal_config`; CREATE TABLE `canal_config` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `cluster_id` bigint(20) DEFAULT NULL, `server_id` bigint(20) DEFAULT NULL, `name` varchar(45) NOT NULL, `status` varchar(45) DEFAULT NULL, `content` text NOT NULL, `content_md5` varchar(128) NOT NULL, `modified_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, PRIMARY KEY (`id`), UNIQUE KEY `sid_UNIQUE` (`server_id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; -- ---------------------------- -- Table structure for canal_instance_config -- ---------------------------- DROP TABLE IF EXISTS `canal_instance_config`; CREATE TABLE `canal_instance_config` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `cluster_id` bigint(20) DEFAULT NULL, `server_id` bigint(20) DEFAULT NULL, `name` varchar(45) NOT NULL, `status` varchar(45) DEFAULT NULL, `content` text NOT NULL, `content_md5` varchar(128) DEFAULT NULL, `modified_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, PRIMARY KEY (`id`), UNIQUE KEY `name_UNIQUE` (`name`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; -- ---------------------------- -- Table structure for canal_node_server -- ---------------------------- DROP TABLE IF EXISTS `canal_node_server`; CREATE TABLE `canal_node_server` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `cluster_id` bigint(20) DEFAULT NULL, `name` varchar(63) NOT NULL, `ip` varchar(63) NOT NULL, `admin_port` int(11) DEFAULT NULL, `tcp_port` int(11) DEFAULT NULL, `metric_port` int(11) DEFAULT NULL, `status` varchar(45) DEFAULT NULL, `modified_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; -- ---------------------------- -- Table structure for canal_user -- ---------------------------- DROP TABLE IF EXISTS `canal_user`; CREATE TABLE `canal_user` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `username` varchar(31) NOT NULL, `password` varchar(128) NOT NULL, `name` varchar(31) NOT NULL, `roles` varchar(31) NOT NULL, `introduction` varchar(255) DEFAULT NULL, `avatar` varchar(255) DEFAULT NULL, `creation_date` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; SET FOREIGN_KEY_CHECKS = 1; -- ---------------------------- -- Records of canal_user -- ---------------------------- BEGIN; INSERT INTO `canal_user` VALUES (1, 'admin', '6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9', 'Canal Manager', 'admin', NULL, NULL, '2019-07-14 00:05:28'); COMMIT; SET FOREIGN_KEY_CHECKS = 1;
4. 启动Canal-Admin
如果是服务器部署的话，记得开放对应的端口号
8089:8089
docker run -d --name canal-admin -p 8089:8089 canal/canal-admin:v1.1.7
5. 拷贝配置文件
docker cp canal-admin:/home/admin/canal-admin/conf/application.yml /data/canal-admin/conf/
6. 删除Canal-Admin容器
docker rm -f canal-admin
7. 修改配置文件
（注意修改注释位置的信息）一共3处修改
server:
port: 8089
spring:
jackson:
date-format: yyyy-MM-dd HH:mm:ss
time-zone: GMT+8
spring.datasource:
address: xxx.xxx.xxx.xxx:3306 #创建数据库canal_manager的地址及端口号
database: canal_manager
username: root #数据库账号
password: xxxxxx #数据库密码
driver-class-name: com.mysql.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
8. 部署Canal-Admin
docker run --name canal-admin -p 8089:8089 \ -v /data/canal-admin/conf/application.yml:/home/admin/canal-admin/conf/application.yml \ -v /data/canal-admin/logs/:/home/admin/canal-admin/logs/ \ -d canal/canal-admin:v1.1.7
9. 访问Canal-Admin
访问 xxx.xxx.xxx.xxx:8089, 前面换成自己的服务器、虚拟机地址
部署Canal-Server
0. 前置工作
查看MYSQL是否
开启log_bin日志和日志记录格式是否为Row
一般都是开启的, 可以通过下列命令在Navicat或其他数据库工具进行查看
show variables like 'log_bin'; show variables like 'binlog_format';
授权账号权限， 复制下列命令执行即可
CREATE USER canal IDENTIFIED BY 'canal'; GRANT SELECT, REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'canal'@'%'; FLUSH PRIVILEGES;
1. 拉取Canal-Server镜像
docker pull canal/canal-server:v1.1.7
2. 创建目录
mkdir -p /data/canal-server/conf/
3. 启动Canal-Server
如果是服务器部署的话，记得开放对应的端口号
11111:11111
docker run -d --name canal-server -p 11111:11111 canal/canal-server:v1.1.7
4. 拷贝配置文件
docker cp canal-server:/home/admin/canal-server/conf/canal.properties /data/canal-server/conf/ docker cp canal-server:/home/admin/canal-server/conf/example/instance.properties /data/canal-server/conf/
5. 删除Canal-Server
docker rm -f canal-server
6. 修改配置文件
canal.properties 一共1处修改
# tcp bind ip
canal.ip =
# register ip to zookeeper
canal.register.ip =
canal.port = 11111
canal.metrics.pull.port = 11112
# canal admin config
canal.admin.manager = xxx.xxx.xxx.xxx:8089 # 改成自己的数据库地址
canal.admin.port = 11110
canal.admin.user = admin
canal.admin.passwd = 4ACFE3202A5FF5CF467898FC58AAB1D615029441
canal.zkServers =
# flush data to zk
canal.zookeeper.flush.period = 1000
canal.withoutNetty = false
# tcp, kafka, rocketMQ, rabbitMQ, pulsarMQ
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 = select 1
canal.instance.detecting.interval.time = 3
canal.instance.detecting.retry.threshold = 3
canal.instance.detecting.heartbeatHaEnable = false
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
canal.instance.filter.dml.insert = false
canal.instance.filter.dml.update = false
canal.instance.filter.dml.delete = 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
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
#################################################
######### destinations #############
#################################################
canal.destinations = example
# 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.auto.reset.latest.pos.mode = false
canal.instance.tsdb.spring.xml = classpath:spring/tsdb/h2-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/file-instance.xml
# canal admin config
canal.admin.manager = xxx.xxx.xxx.xxx:8089 # 改成自己的数据库地址
# admin auto register
canal.admin.register.auto = true
canal.admin.register.cluster =
canal.admin.register.name =
instance.properties 一共2处修改
################################################# ## mysql serverId , v1.0.26+ will autoGen canal.instance.mysql.slaveId=10 # 这里的ID不要和Mysql的重复即可，可以直接填10 # enable gtid use true/false canal.instance.gtidon=false # position info canal.instance.master.address=xxx.xxx.xxx.xxx:3306 # 改成需要监听的数据库地址 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 # username/password canal.instance.dbUsername=canal canal.instance.dbPassword=canal canal.instance.connectionCharset = UTF-8 canal.instance.enableDruid=false # table regex canal.instance.filter.regex=.*\\..* # table black regex canal.instance.filter.black.regex=mysql\\.slave_.* # mq config canal.mq.topic=example canal.mq.partition=0 canal.instance.multi.stream.on=false #################################################
7. 部署Canal-Server
docker run --name canal-server -p 11111:11111 \ -v /data/canal-server/conf/instance.properties:/home/admin/canal-server/conf/example/instance.properties \ -v /data/canal-server/conf/canal.properties:/home/admin/canal-server/conf/canal.properties \ -v /data/canal-server/logs/:/home/docker/canal-server/logs/ \ -d canal/canal-server:v1.1.7
部署Canal-Adapter
由于这个
Canal-Adapter作者并没有上传对应的镜像
但是他上传了对应的tar，所以我们可以制作对应的镜像
Canal-Adapter 的下载链接： Canal-Adapter
1. 创建对应的文件，文件如下
路径尽量跟我的一致
/opt/canal/，因为后面的文件都是在这个路径下
2. 对应的文件内容如下
Dockerfile
FROM openjdk:11
COPY canal.adapter-*.tar.gz /tmp/
RUN \
mkdir -p /opt/canal-adapter && \
tar -zxf /tmp/canal.adapter-*.tar.gz -C /opt/canal-adapter && \
rm -r /tmp/canal.adapter-*.tar.gz
COPY startup.sh /opt/canal-adapter/bin/startup.sh
WORKDIR /opt/canal-adapter
CMD ["sh", "-c", "sh /opt/canal-adapter/bin/startup.sh && tail -F logs/adapter/adapter.log"]
startup.sh
#!/bin/bash
current_path=`pwd`
case "`uname`" in
Linux)
bin_abs_path=$(readlink -f $(dirname $0))
;;
*)
bin_abs_path=`cd $(dirname $0); pwd`
;;
esac
base=${bin_abs_path}/..
export LANG=en_US.UTF-8
export BASE=$base
if [ -f $base/bin/adapter.pid ] ; then
echo "found adapter.pid , Please run stop.sh first ,then startup.sh" 2>&2
exit 1
fi
if [ ! -d $base/logs ] ; then
mkdir -p $base/logs
fi
## set java path
if [ -z "$JAVA" ] ; then
JAVA=$(which java)
fi
ALIBABA_JAVA="/usr/alibaba/java/bin/java"
TAOBAO_JAVA="/opt/taobao/java/bin/java"
if [ -z "$JAVA" ]; then
if [ -f $ALIBABA_JAVA ] ; then
JAVA=$ALIBABA_JAVA
elif [ -f $TAOBAO_JAVA ] ; then
JAVA=$TAOBAO_JAVA
else
echo "Cannot find a Java JDK. Please set either set JAVA or put java (>=1.5) in your PATH." 2>&2
exit 1
fi
fi
case "$#"
in
0 )
;;
2 )
if [ "$1" = "debug" ]; then
DEBUG_PORT=$2
DEBUG_SUSPEND="n"
JAVA_DEBUG_OPT="-Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,address=$DEBUG_PORT,server=y,suspend=$DEBUG_SUSPEND"
fi
;;
* )
echo "THE PARAMETERS MUST BE TWO OR LESS.PLEASE CHECK AGAIN."
exit;;
esac
str=`file -L $JAVA | grep 64-bit`
if [ -n "$str" ]; then
JAVA_OPTS="-server -Xms2048m -Xmx3072m -Xmn1024m -XX:SurvivorRatio=2 -Xss256k -XX:+DisableExplicitGC -XX:+HeapDumpOnOutOfMemoryError"
else
JAVA_OPTS="-server -Xms1024m -Xmx1024m -XX:NewSize=256m -XX:MaxNewSize=256m -XX:MaxPermSize=128m "
fi
JAVA_OPTS=" $JAVA_OPTS -Djava.awt.headless=true -Djava.net.preferIPv4Stack=true -Dfile.encoding=UTF-8"
ADAPTER_OPTS="-DappName=canal-adapter"
for i in $base/lib/*;
do CLASSPATH=$i:"$CLASSPATH";
done
CLASSPATH="$base/conf:$CLASSPATH";
echo "cd to $bin_abs_path for workaround relative path"
cd $bin_abs_path
echo CLASSPATH :$CLASSPATH
exec $JAVA $JAVA_OPTS $JAVA_DEBUG_OPT $ADAPTER_OPTS -classpath .:$CLASSPATH com.alibaba.otter.canal.adapter.launcher.CanalAdapterApplication
3. 构造 Canal-Adapter 镜像
cd /opt/canal docker build -t canal/canal-adapter:v1.1.7 .
4. 创建目录
mkdir -p /data/canal-adapter/conf/es7
5. 启动Canal-Adapter
docker run -d --name canal-adapter -p 8081:8081 canal/canal-adapter:v1.1.7
6. 拷贝配置文件
docker cp canal-adapter:/opt/canal-adapter/conf/application.yml /data/canal-adapter/conf/ docker cp canal-adapter:/opt/canal-adapter/conf/bootstrap.yml /data/canal-adapter/conf/ docker cp canal-adapter:/opt/canal-adapter/conf/es7/mytest_user.yml /data/canal-adapter/conf/es7
7. 删除Canal-Adapter
docker rm -f canal-adapter
8. 修改配置文件
application.yml 一共7处地方
server:
port: 8081
spring:
jackson:
date-format: yyyy-MM-dd HH:mm:ss
time-zone: GMT+8
default-property-inclusion: non_null
canal.conf:
mode: tcp #tcp kafka rocketMQ rabbitMQ
flatMessage: true
zookeeperHosts:
syncBatchSize: 1000
retries: -1
timeout:
accessKey:
secretKey:
consumerProperties:
# canal tcp consumer
canal.tcp.server.host: xxx.xxx.xxx.xxx:11111 #改成部署canal-server的地址
canal.tcp.zookeeper.hosts:
canal.tcp.batch.size: 500
canal.tcp.username:
canal.tcp.password:
srcDataSources:
defaultDS:
url: jdbc:mysql://xxx.xxx.xxx:3341/infusion-xxxxx?useUnicode=true # 监听的数据库地址
username: root #数据库账号
password: xxxxxxx #数据库密码
canalAdapters:
- instance: example #如果没改过的话 默认这个即可
groups:
- groupId: g1
outerAdapters:
- name: logger
- name: es7
hosts: http://xxx.xxx.xxx:9200 #部署Es的服务器地址
properties:
mode: rest # or rest
# security.auth: test:123456 # only used for rest mode
cluster.name: es #部署Es的容器名字
bootstrap.yml
canal:
manager:
jdbc:
url: jdbc:mysql://xxxxxx:3306/canal_manager?useUnicode=true&characterEncoding=UTF-8
username: root
password: xxxxxxx
coupon_record.yml 一共3处地方
dataSourceKey: defaultDS destination: example #如果之前canal-server没改就使用默认example groupId: g1 esMapping: _index: coupon_record #对应索引库名称 _id: _id sql: "select id as _id,coupon_id,create_time,use_state,openid,user_type,user_name,coupon_title,start_time,end_time,order_id,price,condition_price,del_flag from sys_coupon_record" commitBatch: 3000
9. 部署Canal-Adapter
docker run --name canal-adapter -p 8081:8081 \ -v /data/canal-adapter/conf/application.yml:/opt/canal-adapter/conf/application.yml \ -v /data/canal-adapter/conf/bootstrap.yml:/opt/canal-adapter/conf/bootstrap.yml \ -v /data/canal-adapter/conf/es7:/opt/canal-adapter/conf/es7 \ -v /data/canal-adapter/logs:/opt/canal-adapter/logs \ -d canal/canal-adapter:v1.1.7
部署Canal三件套到此结束啦，内容可能有点多，需要认真理解！
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