Canal本地docker快速搭建

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我是靠谱客的博主含蓄故事，最近开发中收集的这篇文章主要介绍Canal本地docker快速搭建，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

本地使用docker安装mysql

docker run -d -p 3306:3306 --name mysql -e MYSQL_ROOT_PASSWORD=123456 mysql:5.7

进入docker,修改mysql配置文件

docker ps
# 拿到刚刚启动的容器id
docker exec -it c360e0496877 /bin/bash

安装mysql

apt-get update
apt-get install vim

进入指定目录, 修改mysql配置文件

cd /etc/mysql/conf.d
vim mysql.cnf

添加三行配置

[mysqld]
log-bin=mysql-bin # 开启 binlog
binlog-format=ROW # 选择 ROW 模式
server_id=1 # 配置 MySQL replaction 需要定义，不要和 canal 的 slaveId 重复

退出容器, 重启

docker restart 6d634953aa8a

连接mysql, 验证binlog格式, 以及是否开启

show variables like 'binlog_format';
show variables like 'log_bin';

创建canal账户, 可以先给全部权限,跑起来以后, 收回多余的权限

CREATE USER canal IDENTIFIED BY 'canal';
-- GRANT SELECT, REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'canal'@'%';
GRANT ALL PRIVILEGES ON *.* TO 'canal'@'%' ;
FLUSH PRIVILEGES;

拉取最新的canal-server

docker pull canal/canal-server

docker run --name canal-server -e canal.instance.master.address=10.236.106.110:3306 -e canal.instance.dbUsername=canal -e canal.instance.dbPassword=canal -p 11110:11110 -p 11111:11111 -p 11112:11112
-d canal/canal-server

启动canal-admin[启动前,要先创建对应的数据库和数据表]
Sql地址

docker run --name canal-admin -e server.port=8089 -e spring.datasource.address=10.236.106.110:3306 -e spring.datasource.database=canal_manager -e spring.datasource.username=canal -e spring.datasource.password=canal -p 8089:8089 -d canal/canal-admin

client消费:

import java.net.InetSocketAddress;
import java.util.List;
import com.alibaba.otter.canal.client.CanalConnectors;
import com.alibaba.otter.canal.client.CanalConnector;
import com.alibaba.otter.canal.common.utils.AddressUtils;
import com.alibaba.otter.canal.protocol.Message;
import com.alibaba.otter.canal.protocol.CanalEntry.Column;
import com.alibaba.otter.canal.protocol.CanalEntry.Entry;
import com.alibaba.otter.canal.protocol.CanalEntry.EntryType;
import com.alibaba.otter.canal.protocol.CanalEntry.EventType;
import com.alibaba.otter.canal.protocol.CanalEntry.RowChange;
import com.alibaba.otter.canal.protocol.CanalEntry.RowData;
public class SimpleCanalClientExample {
public static void main(String[] args) {
// 创建链接
CanalConnector connector = CanalConnectors.newSingleConnector(new InetSocketAddress("127.0.0.1",
11111), "example", "canal", "canal");
int batchSize = 1000;
int emptyCount = 0;
try {
connector.connect();
connector.subscribe(".*\..*");
connector.rollback();
int totalEmptyCount = 120;
while (emptyCount < totalEmptyCount) {
Message message = connector.getWithoutAck(batchSize);
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);
// 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("================&gt; 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("-------&gt; before");
printColumn(rowData.getBeforeColumnsList());
System.out.println("-------&gt; 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());
}
}
}