MySQL与Redis数据同步
下载canal-1.1.4
wget https://github.com/alibaba/canal/releases/download/canal-1.1.4/canal.deployer-1.1.4.tar.gz
tar zvfx canal.deployer-1.1.4.tar.gz
配置MySQL
[mysqld]
log-bin=mysql-bin # 开启Binlog
binlog-format=ROW # 设置Binlog格式为ROW
server_id=1 # 配置一个ServerID
给Canal开专门MySQL用户并授权
CREATE USER canal IDENTIFIED BY 'canal';
GRANT SELECT, REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'canal'@'%';
FLUSH PRIVILEGES;
show master status;
vim canal/conf/example/instance.properties
canal.instance.gtidon=false
# position info
canal.instance.master.address=127.0.0.1:3306
canal.instance.master.journal.name=binlog.000009
canal.instance.master.position=155
canal.instance.master.timestamp=
canal.instance.master.gtid=
# username/password
canal.instance.dbUsername=canal
canal.instance.dbPassword=canal
canal.instance.connectionCharset = UTF-8
canal.instance.defaultDatabaseName=test
# table regex
canal.instance.filter.regex=.*\\..
canal/bin/startup.sh
查看日志canal/logs/example/example.log
while (true) { Message message = connector.getWithoutAck(batchSize); // 获取指定数量的数据 long batchId = message.getId(); try { int size = message.getEntries().size(); if (batchId == -1 || size == 0) { Thread.sleep(1000); } else { processEntries(message.getEntries(), jedis); } connector.ack(batchId); // 提交确认 } catch (Throwable t) { connector.rollback(batchId); // 处理失败, 回滚数据 } }
for (CanalEntry.RowData rowData : rowChage.getRowDatasList()) { if (eventType == CanalEntry.EventType.DELETE) { // 删除 jedis.del(row2Key(user_id, rowData.getBeforeColumnsList())); } else if (eventType == CanalEntry.EventType.INSERT) { // 插入 jedis.set(row2Key(user_id, rowData.getAfterColumnsList()), row2Value(rowData.getAfterColumnsList())); } else { // 更新 jedis.set(row2Key(user_id, rowData.getAfterColumnsList()), row2Value(rowData.getAfterColumnsList())); } }
insert into account_balance values (888, 100, NOW(), 999);
get 888