springboot实现增量备份-凯发k8官方网

springboot canal数据同步凯发k8官方网的解决方案

一、需求

微服务多数据库情况下可以使用canal替代触发器，canal是应阿里巴巴跨机房同步的业务需求而提出的，canal基于数据库的日志解析，获取变更进行增量订阅&消费的业务。无论是canal实验需要还是为了增量备份、主从复制和恢复，都是需要开启mysql-binlog日志，数据目录设置到不同的磁盘分区可以降低io等待。

canal 工作原理

canal 模拟 mysql slave 的交互协议，伪装自己为 mysql slave ，向 mysql master 发送dump 协议

mysql master 收到 dump 请求，开始推送 binary log 给 slave (即 canal )

canal 解析 binary log 对象(原始为 byte 流)

二、部署环境

1、登录mysql查看是否开启binlog，标红的log_bin默认是off关

mysql> show variables like 'log_%';

---------------------------------------- -------------------------------------------------------

| variable_name | value |

---------------------------------------- -------------------------------------------------------

| **log_bin | off** |

| log_bin_basename | |

| log_bin_index | |

| log_bin_trust_function_creators | off |

| log_bin_use_v1_row_events | off |

| log_builtin_as_identified_by_password | off |

| log_error | f:\tools\mysql-5.7.28-winx64\data\desktop-c1lu9iq.err |

| log_error_verbosity | 3 |

| log_output | file |

| log_queries_not_using_indexes | off |

| log_slave_updates | off |

| log_slow_admin_statements | off |

| log_slow_slave_statements | off |

| log_statements_unsafe_for_binlog | on |

| log_syslog | on |

| log_syslog_tag | |

| log_throttle_queries_not_using_indexes | 0 |

| log_timestamps | utc |

| log_warnings | 2 |

---------------------------------------- -------------------------------------------------------

19 rows in set (0.03 sec)

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2、编辑配置文件

[mysqld]

# 设置3306端口

port=3306

# 设置mysql的安装目录，按照个人的实际需要改

basedir=f:\\tools\\mysql-5.7.28-winx64 # 切记此处一定要用双斜杠\\，单斜杠我这里会出错，不过看别人的教程，有的是单斜杠。自己尝试吧

# 设置mysql数据库的数据的存放目录

datadir=f:\\tools\\mysql-5.7.28-winx64\\data # 此处同上

# 允许最大连接数

max_connections=200

# 允许连接失败的次数。这是为了防止有人从该主机试图攻击数据库系统

max_connect_errors=10

# 服务端使用的字符集默认为utf8

character-set-server=utf8

# 创建新表时将使用的默认存储引擎

default-storage-engine=innodb

# 默认使用“mysql_native_password”插件认证

default_authentication_plugin=mysql_native_password

lower_case_table_names=2

sql_mode = strict_trans_tables,no_zero_in_date,no_zero_date,error_for_division_by_zero,no_auto_create_user,no_engine_substitution

max_connections=1000

#实验重点配置

# 开启 binlog

log-bin=mysql-bin

# 选择 row 模式

binlog-format=row

# 配置 mysql replaction 需要定义，不要和 canal 的 slaveid 重复

server_id=1

[mysql]

# 设置mysql客户端默认字符集

default-character-set=utf8

[client]

# 设置mysql客户端连接服务端时默认使用的端口

port=3306

default-character-set=utf8

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3、创建mysql slave 的权限canal账户并且进行远程连接授权

create user canal identified by 'canal';

grant select, replication slave, replication client on *.* to 'canal'@'%';

-- grant all privileges on *.* to 'canal'@'%' ;

flush privileges;

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4、记得重启mysql服务

linux：

systemctl restart mysqld

window:

net stop mysql;

net start mysql;

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三、canal快速部署配置

1、修改配置conf/example/instance.properties

## mysql serverid

canal.instance.mysql.slaveid = 1234

#position info，需要改成自己的数据库信息

canal.instance.master.address = 127.0.0.1:3306

canal.instance.master.journal.name =

canal.instance.master.position =

canal.instance.master.timestamp =

#canal.instance.standby.address =

#canal.instance.standby.journal.name =

#canal.instance.standby.position =

#canal.instance.standby.timestamp =

#username/password，需要改成自己的数据库信息

canal.instance.dbusername = canal

canal.instance.dbpassword = canal

canal.instance.defaultdatabasename =

canal.instance.connectioncharset = utf-8

#table regex

canal.instance.filter.regex = .\*\\\\..\*

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2、通过启动脚本运行：sh bin/startup.sh

3、查看 server 日志和instance 的日志

$ tail -f logs/canal/canal.log

2020-05-28 13:52:03.037 [main] info com.alibaba.otter.canal.deployer.canallauncher - ## set default uncaught exception handler

2020-05-28 13:52:03.065 [main] info com.alibaba.otter.canal.deployer.canallauncher - ## load canal configurations

2020-05-28 13:52:03.072 [main] info com.alibaba.otter.canal.deployer.canalstarter - ## start the canal server.

2020-05-28 13:52:03.444 [main] info com.alibaba.otter.canal.deployer.canalcontroller - ## start the canal server[172.36.58.25(172.36.58.25):11111]

2020-05-28 13:52:04.604 [main] info com.alibaba.otter.canal.deployer.canalstarter - ## the canal server is running now ......

$ tail -f logs/example/example.log

2020-05-28 13:52:04.238 [main] warn o.s.beans.generictypeawarepropertydescriptor - invalid javabean property 'connectioncharset' being accessed! ambiguous write methods found next to actually used [public void com.alibaba.otter.canal.parse.inbound.mysql.abstractmysqleventparser.setconnectioncharset(java.lang.string)]: [public void com.alibaba.otter.canal.parse.inbound.mysql.abstractmysqleventparser.setconnectioncharset(java.nio.charset.charset)]

2020-05-28 13:52:04.264 [main] info c.a.o.c.i.spring.support.propertyplaceholderconfigurer - loading properties file from class path resource [canal.properties]

2020-05-28 13:52:04.265 [main] info c.a.o.c.i.spring.support.propertyplaceholderconfigurer - loading properties file from class path resource [example/instance.properties]

2020-05-28 13:52:04.568 [main] info c.a.otter.canal.instance.spring.canalinstancewithspring - start cannalinstance for 1-example

2020-05-28 13:52:04.572 [main] warn c.a.o.canal.parse.inbound.mysql.dbsync.logeventconvert - --> init table filter : ^.*\..*$

2020-05-28 13:52:04.573 [main] warn c.a.o.canal.parse.inbound.mysql.dbsync.logeventconvert - --> init table black filter :

2020-05-28 13:52:04.577 [main] info c.a.otter.canal.instance.core.abstractcanalinstance - start successful....

2020-05-28 13:52:04.616 [destination = example , address = /127.0.0.1:3306 , eventparser] warn c.a.o.c.p.inbound.mysql.rds.rdsbinlogeventparserproxy - ---> begin to find start position, it will be long time for reset or first position

2020-05-28 13:52:04.616 [destination = example , address = /127.0.0.1:3306 , eventparser] warn c.a.o.c.p.inbound.mysql.rds.rdsbinlogeventparserproxy - prepare to find start position just show master status

2020-05-28 13:52:06.556 [destination = example , address = /127.0.0.1:3306 , eventparser] warn c.a.o.c.p.inbound.mysql.rds.rdsbinlogeventparserproxy - ---> find start position successfully, entryposition[included=false,journalname=mysql-bin.000001,position=4,serverid=1,gtid=,timestamp=1590644973000] cost : 1935ms , the next step is binlog dump

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四、初步监听实验

com.alibaba.otter

canal.client

1.1.0

复制代码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(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 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 columns) {

for (column column : columns) {

system.out.println(column.getname() " : " column.getvalue() " update=" column.getupdated());

}

}

}

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随便插入数据触发

insert into `demo`.`tb_ad`(`id`, `url`, `status`, `position`, `image`, `start_time`, `end_time`) values (1, 'https://www.baidu.com/', '1', 'web_index_lb', 'https://pics1.baidu.com/feed/c83d70cf3bc79f3d5c30d358deb67a17738b29a6.jpeg?https://kins.oss-cn-shenzhen.aliyuncs.com/yhzb/2020-03-11/ca21b3b17d6f4757b991dd86b8cef3fa-vip-680.jpeg', '2020-05-22 10:58:08', '2021-06-01 10:58:14');

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从控制台中看到

empty count : 66

empty count : 67

empty count : 68

empty count : 69

empty count : 70

================> binlog[mysql-bin.000001:355] , name[demo,tb_ad] , eventtype : insert

id : 2 update=true

url : https://www.baidu.com/ update=true

status : 1 update=true

position : web_index_lb update=true

image : https://pics1.baidu.com/feed/c83d70cf3bc79f3d5c30d358deb67a17738b29a6.jpeg?https://kins.oss-cn-shenzhen.aliyuncs.com/yhzb/2020-03-11/ca21b3b17d6f4757b991dd86b8cef3fa-vip-680.jpeg update=true

start_time : 2020-05-22 10:58:08 update=true

end_time : 2021-06-01 10:58:14 update=true

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五、数据监控微服务

top.javatool

canal-spring-boot-starter

1.2.1-release

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订阅数据库的增删改操作

import org.slf4j.logger;

import org.slf4j.loggerfactory;

import org.springframework.stereotype.component;

import top.javatool.canal.client.annotation.canaltable;

import top.javatool.canal.client.handler.entryhandler;

@component

@canaltable(value = "t_user")

public class userhandler implements entryhandler {

private logger logger = loggerfactory.getlogger(userhandler.class);

public void insert(user user) {

logger.info("insert message {}", user);

}

public void update(user before, user after) {

logger.info("update before {} ", before);

logger.info("update after {}", after);

}

public void delete(user user) {

logger.info("delete {}", user);

}

}

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启动数据监控微服务，修改user表，观察控制台输出。

2020-05-28 16:23:22.667 info 24284 --- [l-client-thread] t.j.c.client.client.abstractcanalclient : 获取消息 message[id=23,entries=[header {

version: 1

logfilename: "mysql-bin.000001"

logfileoffset: 18380

serverid: 1

serverencode: "utf-8"

executetime: 1590654201000

sourcetype: mysql

schemaname: ""

tablename: ""

eventlength: 68

}

entrytype: transactionbegin

storevalue: " \025"

, header {

version: 1

logfilename: "mysql-bin.000001"

logfileoffset: 18505

serverid: 1

serverencode: "utf-8"

executetime: 1590654201000

sourcetype: mysql

schemaname: "demo"

tablename: "t_user"

eventlength: 88

eventtype: update

props {

key: "rowscount"

value: "1"

}

}

entrytype: rowdata

storevalue: "\b\210\002\020\002p\000b\370\003\n\033\b\000\020\004\032\002id \001(\0000\000b\00221r\aint(11)\n*\b\001\020\f\032\tuser_name \000(\0000\000b\005zeldar\fvarchar(255)\n*\b\002\020\372\377\377\377\377\377\377\377\377\001\032\006gender \000(\0000\000b\0010r\ntinyint(4)\n\"\b\003\020\004\032\ncountry_id \000(\0000\000b\0011r\aint(11)\n&\b\004\020[\032\bbirthday \000(\0000\000b\n1998-04-18r\004date\n7\b\005\020]\032\vcreate_time \000(\0000\000b\0231991-01-10 05:45:50r\ttimestamp\022\033\b\000\020\004\032\002id \001(\0000\000b\00221r\aint(11)\022.\b\001\020\f\032\tuser_name \000(\0010\000b\tzelda1111r\fvarchar(255)\022*\b\002\020\372\377\377\377\377\377\377\377\377\001\032\006gender \000(\0000\000b\0010r\ntinyint(4)\022\"\b\003\020\004\032\ncountry_id \000(\0000\000b\0011r\aint(11)\022&\b\004\020[\032\bbirthday \000(\0000\000b\n1998-04-18r\004date\0227\b\005\020]\032\vcreate_time \000(\0000\000b\0231991-01-10 05:45:50r\ttimestamp"

, header {

version: 1

logfilename: "mysql-bin.000001"

logfileoffset: 18593

serverid: 1

serverencode: "utf-8"

executetime: 1590654201000

sourcetype: mysql

schemaname: ""

tablename: ""

eventlength: 31

}

entrytype: transactionend

storevalue: "\022\0041574"

],raw=false,rawentries=[]]

2020-05-28 16:23:22.668 info 24284 --- [xecute-thread-6] t.j.canal.example.handler.userhandler : update before user{id=null, username='zelda', gender=null, countryid=null, birthday=null, createtime=null}

2020-05-28 16:23:22.668 info 24284 --- [xecute-thread-6] t.j.canal.example.handler.userhandler : update after user{id=21, username='zelda1111', gender=0, countryid=1, birthday=sat apr 18 00:00:00 cst 1998, createtime=thu jan 10 05:45:50 cst 1991}

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