基于canal 解决Redis与数据库数据不一致问题
目录
一、业务场景
二、Canal介绍
三、搭建Canal
传统方式
Docker方式
四、代码演示
一、业务场景
在实际生产过程中，由于网络原因或者Redis故障等等原因会导致Redis与数据库数据不一致的问题，这个时候我们怎么办？或许我们可以写一个定时Job然后定时去跑数据，或者找到那条数据不一致，然后删除Redis中的缓存，但是这些都有缺点，定时任务跑数据，延时性太大了。如果是删除缓存，数据量少还可以，数据量多了呢，写脚本？那脚本执行时候一定会影响Redis性能。Canal这个开源框架可以很友好的解决我们上面这些问题。
二、Canal介绍
Canal是阿里巴巴的开源项目，其原理是使用数据库的主从复制。
当前的 canal 支持源端 MySQL 版本包括 5.1.x , 5.5.x , 5.6.x , 5.7.x , 8.0.x。
- 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)
三、搭建Canal
传统方式
1、搭建mysql数据库
参考：Linux安装Mysql8.0.27集群（传统方式&Docker方式）&&主从复制配置_熟透的蜗牛的博客-CSDN博客
2、配置主数据库
[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。
#授权 canal 链接 MySQL 账号具有作为 MySQL slave 的权限
CREATE USER canal IDENTIFIED BY 'canal';
GRANT SELECT, REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'canal'@'%';
FLUSH PRIVILEGES;3、搭建CanalServer
#下载canal安装包
[root@localhost ~] wget https://github.com/alibaba/canal/releases/download/canal-1.1.5/canal.deployer-1.1.5.tar.gz4、创建安装目录并解压文件
[root@localhost mysql]# mkdir -p /usr/local/canal
[root@localhost ~]# tar -zxvf canal.deployer-1.1.5.tar.gz -C /usr/local/canal/5、配置（基于RocketMQ）
Rocketmq安装:Docker安装多主多备rocketMQ集群之Docker-compose方式_熟透的蜗牛的博客-CSDN博客
本人使用的是jdk17需要修改启动脚本startup.sh ，jdk8不需要修改，
压缩包下载： spring-boot: Springboot整合redis、消息中间件等相关代码 - Gitee.com
修改源码maven中的依赖,打包之后修改配合文件即可
io.netty
netty-all
4.1.70.Final
#启动脚本
#!/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}/..
canal_conf=$base/conf/canal.properties
canal_local_conf=$base/conf/canal_local.properties
logback_configurationFile=$base/conf/logback.xml
export LANG=en_US.UTF-8
export BASE=$base
if [ -f $base/bin/canal.pid ] ; then
echo "found canal.pid , Please run stop.sh first ,then startup.sh" 2>&2
exit 1
fi
if [ ! -d $base/logs/canal ] ; then
mkdir -p $base/logs/canal
fi
## set java path
if [ -z "$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 "$#"
in
0 )
;;
1 )
var=$*
if [ "$var" = "local" ]; then
canal_conf=$canal_local_conf
else
if [ -f $var ] ; then
canal_conf=$var
else
echo "THE PARAMETER IS NOT CORRECT.PLEASE CHECK AGAIN."
exit
fi
fi;;
2 )
var=$1
if [ "$var" = "local" ]; then
canal_conf=$canal_local_conf
else
if [ -f $var ] ; then
canal_conf=$var
else
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
fi
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 -XX:PermSize=96m -XX:MaxPermSize=256m -Xss256k -XX:-UseAdaptiveSizePolicy -XX:MaxTenuringThreshold=15 -XX:+DisableExplicitGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:+UseCMSCompactAtFullCollection -XX:+UseFastAccessorMethods -XX:+UseCMSInitiatingOccupancyOnly -XX:+HeapDumpOnOutOfMemoryError"
#else
# JAVA_OPTS="-server -Xms1024m -Xmx1024m -XX:NewSize=256m -XX:MaxNewSize=256m -XX:MaxPermSize=128m "
#fi
if [ -n "$str" ]; then
JAVA_OPTS="-server -Xms256m -Xmx256m -Xmn128m -XX:SurvivorRatio=2 -Xss256k -XX:-UseAdaptiveSizePolicy -XX:MaxTenuringThreshold=15 -XX:+DisableExplicitGC -XX:+UseG1GC -XX:G1HeapRegionSize=16m -XX:G1ReservePercent=25 -XX:InitiatingHeapOccupancyPercent=30 -XX:SoftRefLRUPolicyMSPerMB=0 "
else
JAVA_OPTS="-server -Xms256m -Xmx256m -Xmn128m -XX:MaxNewSize=256m "
fi
JAVA_OPTS=" $JAVA_OPTS -Djava.awt.headless=true -Djava.net.preferIPv4Stack=true -Dfile.encoding=UTF-8"
CANAL_OPTS="-DappName=otter-canal -Dlogback.configurationFile=$logback_configurationFile -Dcanal.conf=$canal_conf"
if [ -e $canal_conf -a -e $logback_configurationFile ]
then
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 LOG CONFIGURATION : $logback_configurationFile
echo canal conf : $canal_conf
echo CLASSPATH :$CLASSPATH
$JAVA $JAVA_OPTS $JAVA_DEBUG_OPT $CANAL_OPTS -classpath .:$CLASSPATH com.alibaba.otter.canal.deployer.CanalLauncher 1>>$base/logs/canal/canal_stdout.log 2>&1 &
echo $! > $base/bin/canal.pid
echo "cd to $current_path for continue"
cd $current_path
else
echo "canal conf("$canal_conf") OR log configration file($logback_configurationFile) is not exist,please create then first!"
fi
canal.properties
#################################################
######### common argument #############
#################################################
# tcp bind ip
canal.ip =
# register ip to zookeeper
canal.register.ip =
canal.port = 11111
canal.metrics.pull.port = 11112
# canal instance user/passwd
# canal.user = canal
# canal.passwd = E3619321C1A937C46A0D8BD1DAC39F93B27D4458
# canal admin config
#canal.admin.manager = 127.0.0.1:8089
canal.admin.port = 11110
canal.admin.user = admin
canal.admin.passwd = 4ACFE3202A5FF5CF467898FC58AAB1D615029441
# admin auto register
#canal.admin.register.auto = true
#canal.admin.register.cluster =
#canal.admin.register.name =
#集群使用
canal.zkServers =
# flush data to zk
canal.zookeeper.flush.period = 1000
canal.withoutNetty = false
# tcp, kafka, rocketMQ, rabbitMQ
#需要修改的地方
canal.serverMode = rocketMQ
# 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 = insert into retl.xdual values(1,now()) on duplicate key update x=now()
canal.instance.detecting.sql = select 1
canal.instance.detecting.interval.time = 3
canal.instance.detecting.retry.threshold = 3
canal.instance.detecting.heartbeatHaEnable = false
# support maximum transaction size, more than the size of the transaction will be cut into multiple transactions delivery
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
## concurrent thread number, default 60% available processors, suggest not to exceed Runtime.getRuntime().availableProcessors()
#canal.instance.parser.parallelThreadSize = 16
## disruptor ringbuffer size, must be power of 2
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实例,对应example文件，如果需要多个请将example也复制多分canal.destinations = example,example1,example2
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
# set this value to 'true' means that when binlog pos not found, skip to latest.
# WARN: pls keep 'false' in production env, or if you know what you want.
canal.auto.reset.latest.pos.mode = false
canal.instance.tsdb.spring.xml = classpath:spring/tsdb/h2-tsdb.xml
#canal.instance.tsdb.spring.xml = classpath:spring/tsdb/mysql-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/memory-instance.xml
canal.instance.global.spring.xml = classpath:spring/file-instance.xml
#canal.instance.global.spring.xml = classpath:spring/default-instance.xml
##################################################
######### MQ Properties #############
##################################################
# aliyun ak/sk , support rds/mq
canal.aliyun.accessKey =
canal.aliyun.secretKey =
canal.aliyun.uid=
canal.mq.flatMessage = true
canal.mq.canalBatchSize = 50
canal.mq.canalGetTimeout = 100
# Set this value to "cloud", if you want open message trace feature in aliyun.
canal.mq.accessChannel = local
canal.mq.database.hash = true
canal.mq.send.thread.size = 30
canal.mq.build.thread.size = 8
##################################################
######### Kafka #############
##################################################
kafka.bootstrap.servers = 127.0.0.1:9092
kafka.acks = all
kafka.compression.type = none
kafka.batch.size = 16384
kafka.linger.ms = 1
kafka.max.request.size = 1048576
kafka.buffer.memory = 33554432
kafka.max.in.flight.requests.per.connection = 1
kafka.retries = 0
kafka.kerberos.enable = false
kafka.kerberos.krb5.file = "../conf/kerberos/krb5.conf"
kafka.kerberos.jaas.file = "../conf/kerberos/jaas.conf"
##################################################
######### RocketMQ #############
##################################################
rocketmq.producer.group = test
rocketmq.enable.message.trace = false
rocketmq.customized.trace.topic =
rocketmq.namespace =
#需要修改的地方，多个值用分号隔开
rocketmq.namesrv.addr = 192.168.6.145:9876;192.168.6.145:9877
rocketmq.retry.times.when.send.failed = 0
rocketmq.vip.channel.enabled = false
rocketmq.tag = canal
##################################################
######### RabbitMQ #############
##################################################
rabbitmq.host =
rabbitmq.virtual.host =
rabbitmq.exchange =
rabbitmq.username =
rabbitmq.password =
rabbitmq.deliveryMode =instance.properties
#################################################
## mysql serverId , v1.0.26+ will autoGen
# canal.instance.mysql.slaveId=0
# enable gtid use true/false
canal.instance.gtidon=false
# position info
#修改成自己的数据库连接
canal.instance.master.address=192.168.6.145:3306
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
#canal.instance.tsdb.url=jdbc:mysql://127.0.0.1:3306/canal_tsdb
#canal.instance.tsdb.dbUsername=canal
#canal.instance.tsdb.dbPassword=canal
#canal.instance.standby.address =
#canal.instance.standby.journal.name =
#canal.instance.standby.position =
#canal.instance.standby.timestamp =
#canal.instance.standby.gtid=
# username/password
#数据库连接账号和密码
canal.instance.dbUsername=canal
canal.instance.dbPassword=canal
canal.instance.connectionCharset = UTF-8
# enable druid Decrypt database password
canal.instance.enableDruid=false
#canal.instance.pwdPublicKey=MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBALK4BUxdDltRRE5/zXpVEVPUgunvscYFtEip3pmLlhrWpacX7y7GCMo2/JM6LeHmiiNdH1FWgGCpUfircSwlWKUCAwEAAQ==
# table regex
#mysql 数据解析关注的表，Perl正则表达式.
#多个正则之间以逗号(,)分隔，转义符需要双斜杠(\\)
#常见例子：
#1. 所有表：.* or .*\\..*
#2. canal schema下所有表： canal\\..*
#3. canal下的以canal打头的表：canal\\.canal.*
#4. canal schema下的一张表：canal\\.test1
#5. 多个规则组合使用：canal\\..*,mysql.test1,mysql.test2 (逗号分隔)
canal.instance.filter.regex=.*\\..*
# table black regex
canal.instance.filter.black.regex=mysql\\.slave_.*
# table field filter(format: schema1.tableName1:field1/field2,schema2.tableName2:field1/field2)
#canal.instance.filter.field=test1.t_product:id/subject/keywords,test2.t_company:id/name/contact/ch
# table field black filter(format: schema1.tableName1:field1/field2,schema2.tableName2:field1/field2)
#canal.instance.filter.black.field=test1.t_product:subject/product_image,test2.t_company:id/name/contact/ch
# mq config
#定义的topic主题
canal.mq.topic=canal-topic
# dynamic topic route by schema or table regex
#canal.mq.dynamicTopic=mytest1.user,mytest2\\..*,.*\\..*
canal.mq.partition=0
# hash partition config
#canal.mq.partitionsNum=3
#canal.mq.partitionHash=test.table:id^name,.*\\..*
#canal.mq.dynamicTopicPartitionNum=test.*:4,mycanal:6
#################################################
6、启动
#启动
sh bin/startup.sh
#停止
sh bin/stop.shDocker方式
1、拉取镜像
docker pull canal/canal-server:v1.1.52、创建canal-docker目录存放启动脚本
[root@bogon ~]# mkdir /usr/local/canal-docker#!/bin/bash
function usage() {
echo "Usage:"
echo " run.sh [CONFIG]"
echo "example 1 :"
echo " run.sh -e canal.instance.master.address=127.0.0.1:3306 \\"
echo " -e canal.instance.dbUsername=canal \\"
echo " -e canal.instance.dbPassword=canal \\"
echo " -e canal.instance.connectionCharset=UTF-8 \\"
echo " -e canal.instance.tsdb.enable=true \\"
echo " -e canal.instance.gtidon=false \\"
echo " -e canal.instance.filter.regex=.*\\\\\\..* "
echo "example 2 :"
echo " run.sh -e canal.admin.manager=127.0.0.1:8089 \\"
echo " -e canal.admin.port=11110 \\"
echo " -e canal.admin.user=admin \\"
echo " -e canal.admin.passwd=4ACFE3202A5FF5CF467898FC58AAB1D615029441"
exit
}
function check_port() {
local port=$1
local TL=$(which telnet)
if [ -f $TL ]; then
data=`echo quit | telnet 127.0.0.1 $port| grep -ic connected`
echo $data
return
fi
local NC=$(which nc)
if [ -f $NC ]; then
data=`nc -z -w 1 127.0.0.1 $port | grep -ic succeeded`
echo $data
return
fi
echo "0"
return
}
function getMyIp() {
case "`uname`" in
Darwin)
myip=`echo "show State:/Network/Global/IPv4" | scutil | grep PrimaryInterface | awk '{print $3}' | xargs ifconfig | grep inet | grep -v inet6 | awk '{print $2}'`
;;
*)
myip=`ip route get 1 | awk '{print $NF;exit}'`
;;
esac
echo $myip
}
CONFIG=${@:1}
#VOLUMNS="-v $DATA:/home/admin/canal-server/logs"
PORTLIST="11110 11111 11112 9100"
PORTS=""
for PORT in $PORTLIST ; do
#exist=`check_port $PORT`
exist="0"
if [ "$exist" == "0" ]; then
PORTS="$PORTS -p $PORT:$PORT"
else
echo "port $PORT is used , pls check"
exit 1
fi
done
NET_MODE=""
case "`uname`" in
Darwin)
bin_abs_path=`cd $(dirname $0); pwd`
;;
Linux)
bin_abs_path=$(readlink -f $(dirname $0))
NET_MODE="--net=host"
PORTS=""
;;
*)
bin_abs_path=`cd $(dirname $0); pwd`
NET_MODE="--net=host"
PORTS=""
;;
esac
BASE=${bin_abs_path}
DATA="$BASE/data"
mkdir -p $DATA
if [ $# -eq 0 ]; then
usage
elif [ "$1" == "-h" ] ; then
usage
elif [ "$1" == "help" ] ; then
usage
fi
MEMORY="-m 4096m"
LOCALHOST=`getMyIp`
cmd="docker run -d -it -h $LOCALHOST $CONFIG --name=canal-server $VOLUMNS $NET_MODE $PORTS $MEMORY canal/canal-server:v1.1.5"
echo $cmd
eval $cmd3、创建docker容器
sh run.sh -e canal.auto.scan=false \
-e canal.destinations=test \
-e canal.instance.master.address=127.0.0.1:3306 \
-e canal.instance.dbUsername=canal \
-e canal.instance.dbPassword=canal \
-e canal.instance.connectionCharset=UTF-8 \
-e canal.instance.tsdb.enable=true \
-e canal.instance.gtidon=false \
-e canal.serverMode=rocketMQ \
-e rocketmq.namesrv.addr=192.168.139.156:9876 \
-e rocketmq.producer.group=test \
-e canal.mq.topic=canal-topic
参数说明
canal.auto.scan=false #是否开启自动扫描
canal.destinations=test #对应配置文件中的canal.destinations=example
canal.instance.master.address=127.0.0.1:3306 #数据库链接地址
canal.instance.dbUsername=canal #数据库用户名
canal.instance.dbPassword=canal #数据库密码
canal.instance.connectionCharset=UTF-8 #编码格式
canal.instance.tsdb.enable=true #切换数据库
canal.instance.gtidon=false #没搞明白
canal.serverMode=rocketMQ #有tcp, kafka, rocketMQ, rabbitMQ
rocketmq.namesrv.addr=rocketmq.namesrv.addr=192.168.139.156:9876 #多个地址启动之后，连不上rocketmq,其他的mq没有尝试未知
rocketmq.producer.group=test #生产者组
canal.mq.topic=canal-topic#对应的topic
4、docker 安装v1.1.5
cannal.properties
#################################################
######### common argument #############
#################################################
# tcp bind ip
canal.ip =
# register ip to zookeeper
canal.register.ip =
canal.port = 11111
canal.metrics.pull.port = 11112
# canal instance user/passwd
# canal.user = canal
# canal.passwd = E3619321C1A937C46A0D8BD1DAC39F93B27D4458
# canal admin config
#canal.admin.manager = 127.0.0.1:8089
canal.admin.port = 11110
canal.admin.user = admin
canal.admin.passwd = 4ACFE3202A5FF5CF467898FC58AAB1D615029441
# admin auto register
#canal.admin.register.auto = true
#canal.admin.register.cluster =
#canal.admin.register.name =
canal.zkServers =
# flush data to zk
canal.zookeeper.flush.period = 1000
canal.withoutNetty = false
# tcp, kafka, rocketMQ, rabbitMQ
canal.serverMode = kafka
# 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 = insert into retl.xdual values(1,now()) on duplicate key update x=now()
canal.instance.detecting.sql = select 1
canal.instance.detecting.interval.time = 3
canal.instance.detecting.retry.threshold = 3
canal.instance.detecting.heartbeatHaEnable = false
# support maximum transaction size, more than the size of the transaction will be cut into multiple transactions delivery
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
## concurrent thread number, default 60% available processors, suggest not to exceed Runtime.getRuntime().availableProcessors()
#canal.instance.parser.parallelThreadSize = 16
## disruptor ringbuffer size, must be power of 2
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
# set this value to 'true' means that when binlog pos not found, skip to latest.
# WARN: pls keep 'false' in production env, or if you know what you want.
canal.auto.reset.latest.pos.mode = false
canal.instance.tsdb.spring.xml = classpath:spring/tsdb/h2-tsdb.xml
#canal.instance.tsdb.spring.xml = classpath:spring/tsdb/mysql-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/memory-instance.xml
canal.instance.global.spring.xml = classpath:spring/file-instance.xml
#canal.instance.global.spring.xml = classpath:spring/default-instance.xml
##################################################
######### MQ Properties #############
##################################################
# aliyun ak/sk , support rds/mq
canal.aliyun.accessKey =
canal.aliyun.secretKey =
canal.aliyun.uid=
canal.mq.flatMessage = true
canal.mq.canalBatchSize = 50
canal.mq.canalGetTimeout = 100
# Set this value to "cloud", if you want open message trace feature in aliyun.
canal.mq.accessChannel = local
canal.mq.database.hash = true
canal.mq.send.thread.size = 30
canal.mq.build.thread.size = 8
##################################################
######### Kafka #############
##################################################
kafka.bootstrap.servers = 192.168.178.134:9092
kafka.acks = all
kafka.compression.type = none
kafka.batch.size = 16384
kafka.linger.ms = 1
kafka.max.request.size = 1048576
kafka.buffer.memory = 33554432
kafka.max.in.flight.requests.per.connection = 1
kafka.retries = 0
kafka.kerberos.enable = false
kafka.kerberos.krb5.file = "../conf/kerberos/krb5.conf"
kafka.kerberos.jaas.file = "../conf/kerberos/jaas.conf"
##################################################
######### RocketMQ #############
##################################################
rocketmq.producer.group = test
rocketmq.enable.message.trace = false
rocketmq.customized.trace.topic =
rocketmq.namespace =
rocketmq.namesrv.addr = 127.0.0.1:9876
rocketmq.retry.times.when.send.failed = 0
rocketmq.vip.channel.enabled = false
rocketmq.tag =
##################################################
######### RabbitMQ #############
##################################################
rabbitmq.host =
rabbitmq.virtual.host =
rabbitmq.exchange =
rabbitmq.username =
rabbitmq.password =
rabbitmq.deliveryMode =insatance.properties
#################################################
## mysql serverId , v1.0.26+ will autoGen
# canal.instance.mysql.slaveId=0
# enable gtid use true/false
canal.instance.gtidon=false
# position info
canal.instance.master.address=127.0.0.1:3306
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
#canal.instance.tsdb.url=jdbc:mysql://127.0.0.1:3306/canal_tsdb
#canal.instance.tsdb.dbUsername=canal
#canal.instance.tsdb.dbPassword=canal
#canal.instance.standby.address =
#canal.instance.standby.journal.name =
#canal.instance.standby.position =
#canal.instance.standby.timestamp =
#canal.instance.standby.gtid=
# username/password
canal.instance.dbUsername=canal
canal.instance.dbPassword=canal
canal.instance.connectionCharset = UTF-8
# enable druid Decrypt database password
canal.instance.enableDruid=false
#canal.instance.pwdPublicKey=MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBALK4BUxdDltRRE5/zXpVEVPUgunvscYFtEip3pmLlhrWpacX7y7GCMo2/JM6LeHmiiNdH1FWgGCpUfircSwlWKUCAwEAAQ==
# table regex
#canal.instance.filter.regex=.*\\..*
canal.instance.filter.regex=test.* #test库下的所有的表
# table black regex
canal.instance.filter.black.regex=mysql\\.slave_.*
# table field filter(format: schema1.tableName1:field1/field2,schema2.tableName2:field1/field2)
#canal.instance.filter.field=test1.t_product:id/subject/keywords,test2.t_company:id/name/contact/ch
# table field black filter(format: schema1.tableName1:field1/field2,schema2.tableName2:field1/field2)
#canal.instance.filter.black.field=test1.t_product:subject/product_image,test2.t_company:id/name/contact/ch
# mq config
canal.mq.topic=test-topic
# dynamic topic route by schema or table regex
#canal.mq.dynamicTopic=mytest1.user,mytest2\\..*,.*\\..*
canal.mq.partition=0
# hash partition config
#canal.mq.partitionsNum=3
#canal.mq.partitionHash=test.table:id^name,.*\\..*
#canal.mq.dynamicTopicPartitionNum=test.*:4,mycanal:6
#################################################
docker run --net=host --name canal \
-v /data/canal/instance.properties:/home/admin/canal-server/conf/example/instance.properties \
-v /data/canal/canal.properties:/home/admin/canal-server/conf/canal.properties \
-d canal/canal-server:v1.1.5四、代码演示
package com.xiaojie.canal;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.xiaojie.entity.User;
import com.xiaojie.utils.RedisUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.rocketmq.spring.annotation.ConsumeMode;
import org.apache.rocketmq.spring.annotation.RocketMQMessageListener;
import org.apache.rocketmq.spring.annotation.SelectorType;
import org.apache.rocketmq.spring.core.RocketMQListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
/**
* @Description:解决redis与数据库数据不一致问题
* @author: yan
* @date: 2021.11.25
*/
@Component
@RocketMQMessageListener(consumerGroup = "canal1", topic = "canal-topic", consumeMode = ConsumeMode.ORDERLY
, selectorType = SelectorType.TAG, selectorExpression = "*")
@Slf4j
public class CanalConsumer implements RocketMQListener {
@Autowired
private RedisUtil redisUtil;
@Override
public void onMessage(String message) {
try {
log.info("接收到的数据是：》》》》》》{}", message);
JSONObject jsonObj = JSONObject.parseObject(message);
JSONArray jsonArray = (JSONArray) jsonObj.get("data");
if (null != jsonArray && jsonArray.size() > 0) {
User user = JSONObject.parseObject(jsonArray.get(0).toString(), User.class);
String database = jsonObj.getString("database");
String table = jsonObj.getString("table");
String type = jsonObj.getString("type");
if (StringUtils.isEmpty(type)) {
log.info("不用同步数据。。。。。。。。。。。。。。");
}
if (type.equals("INSERT") || type.equals("UPDATE")) {
log.info("更新数据》》》》》》》》》》》》");
redisUtil.set(database + "_" + table + "_" + user.getId(), JSONObject.toJSONString(user), 24 * 60 * 60);
} else {
if (redisUtil.hasKey(database + "_" + table + "_" + user.getId())) {
log.info("删除数据》》》》》》》》》》》》");
redisUtil.del(database + "_" + table + "_" + user.getId());
}
}
}
} catch (Exception e) {
log.info("数据更新异常》》》》》》》》》》》》", e);
}
}
}
完整代码：spring-boot: Springboot整合redis、消息中间件等相关代码