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Linux: Canal 数据库日志订阅

参考：

mysql 要求

canal的原理是基于mysql binlog技术，所以这里一定需要开启mysql的binlog写入功能，并且配置binlog模式为row. 

[mysqld]  
log-bin=mysql-bin #添加这一行就ok  
binlog-format=ROW #选择row模式  
server_id=1 #配置mysql replaction需要定义，不能和canal的slaveId重复

检查 

mysql> show variables like 'binlog_format';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| binlog_format | ROW   |
+---------------+-------+


mysql> show variables like 'log_bin';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| log_bin       | ON    |
+---------------+-------+

canal的原理是模拟自己为mysql slave，所以这里一定需要做为mysql slave的相关权限 

CREATE USER canal IDENTIFIED BY 'Canal!123';
GRANT SELECT, REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'canal'@'%';  
-- GRANT ALL PRIVILEGES ON *.* TO 'canal'@'%' ;  
FLUSH PRIVILEGES;

检查权限 

show grants for 'canal'

部署

  • canal-admin 相当于管理角色，统一canal.properties/instance.properties配置
  • canal-server(自动加入)
    • 加载canal.properties就绪服务
    • 加载instance.properties配置，定义从哪个mysql订单日志，并推送到哪里如kafka,rocketmq等

canal-admin

需要一个canal-admin管里的库 

CREATE USER canal IDENTIFIED BY 'Canal!123';  
GRANT ALL ON *.* TO 'canal'@'%' ;  
FLUSH PRIVILEGES;

部署文件 

[root@proxy canal-admin]# cat deployment.yaml 
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: canal-admin
  name: canal-admin
  namespace: dev1
spec:
  replicas: 1
  selector:
    matchLabels:
  app: canal-admin
  template:
    metadata:
  labels:
        app: canal-admin
    spec:
  containers:
        - env:
            - name: JAVA_OPTS
          value: >-
                -Dspring.datasource.address=canal-manager-mysql.com
                -Dspring.datasource.database=canal_manager
                -Dspring.datasource.username=canal
                -Dspring.datasource.password=Canal!123
                -Dcanal.adminPasswd=ZaIjVvX5q8F7LyKu #ui登录密码
          image: 'canal/canal-admin:v1.1.7'
          imagePullPolicy: IfNotPresent
          livenessProbe:
            failureThreshold: 3
            initialDelaySeconds: 15
            periodSeconds: 10
            successThreshold: 1
            tcpSocket:
          port: 8089
            timeoutSeconds: 1
          name: canal-admin
          resources:
            requests:
          cpu: 250m
          memory: 512Mi
          startupProbe:
            failureThreshold: 3
            initialDelaySeconds: 15
            periodSeconds: 10
            successThreshold: 1
            tcpSocket:
          port: 8089
            timeoutSeconds: 1
  restartPolicy: Always

[root@proxy canal-admin]# cat service.yaml 
apiVersion: v1
kind: Service
metadata:
  name: canal-admin
  namespace: dev1
spec:
  ports:
    - port: 8089
  name: http
  protocol: TCP
  targetPort: 8089
  selector:
    app: canal-admin
  type: ClusterIP

[root@proxy dev1]# cat ingress/ingress-cms-dev.yaml 
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress-cms-dev
  namespace: dev1
spec:
  ingressClassName: nginx-dev
  rules:
    - host: canal-admin.xxx.com
  http:
        paths:
          - backend:
          service:
                name: canal-admin
                port:
                  number: 8089
            path: /
            pathType: ImplementationSpecific

部署zookeeper

用于管理canale-server集群。如创建集群名 cluster-kafka，指定zookeeper地址

添加canal.properties配置

点击集群操作，修改主配置。可载入模板再其上修改。

如 

#################################################
######### 		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 = FB85C3E706468CAEA8E37E43BA5AC422991C78E7
# 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, pulsarMQ
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 = false
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!123
# 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 =
# 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 = manager
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 = b-2.logtest.2g3di3.c7.kafka.us-west-2.amazonaws.com: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

# sasl demo
# kafka.sasl.jaas.config = org.apache.kafka.common.security.scram.ScramLoginModule required \\n username=\"alice\" \\npassword="alice-secret\";
# kafka.sasl.mechanism = SCRAM-SHA-512
# kafka.security.protocol = SASL_PLAINTEXT

canal.admin.passwd = FB85C3E706468CAEA8E37E43BA5AC422991C78E7

参考：https://github.com/alibaba/canal/wiki/Canal-Admin-ServerGuide 

select password('ZaIjVvX5q8F7LyKu')
# 如果遇到mysql8.0，可以使用select upper(sha1(unhex(sha1('ZaIjVvX5q8F7LyKu'))))

空间指针报错时，禁用了

canal.instance.tsdb.enable = false

canal-server

[root@proxy canal-server]# cat configmap.yaml 
apiVersion: v1
data:
  start_canal_server.sh: >-
    cat > /home/admin/canal-server/conf/canal.properties <<- EOF

    # register ip

    # ${HOSTNAME} 为podname，canal-server-discovery-svc-stable为svc名称

    # StatefulSet类型pod名称是固定的，k8s集群内pod域名规则为pod_name.svc_name.namespace.svc.cluster.local

    canal.register.ip = ${POD_IP}

    # canal admin config

    canal.admin.manager = canal-admin:8089

    canal.admin.port = 11110

    canal.admin.user = admin

    canal.admin.passwd = FB85C3E706468CAEA8E37E43BA5AC422991C78E7

    # admin auto register

    canal.admin.register.auto = true

    canal.admin.register.cluster = cluster-kafka

    EOF

    bash /home/admin/app.sh
kind: ConfigMap
metadata:
  name: canal-config
  namespace: dev1

[root@proxy canal-server]# cat deployment.yaml 
apiVersion: apps/v1
kind: Deployment
metadata:
  name: canal-server
  namespace: dev1
  labels:
    app: canal-server
    version: v1
spec:
  selector:
    matchLabels:
  app: canal-server
  version: v1
  template:
    metadata:
  labels:
        app: canal-server
        version: v1
    spec:
  affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
          - labelSelector:
          matchExpressions:
          - key: app
                operator: In
                values:
                - canal-server
            namespaces:
            - dev1
            topologyKey: kubernetes.io/hostname
          preferredDuringSchedulingIgnoredDuringExecution:
          - podAffinityTerm:
          labelSelector:
                matchLabels:
                  app: canal-admin
          namespaces:
          - dev1
          topologyKey: kubernetes.io/hostname
            weight: 10
  imagePullSecrets:
  - name: aliyun-singapore-repo
  containers:
  - name: canal-server
        image: canal/canal-server:v1.1.7
        imagePullPolicy: Always 
        command: ["/bin/sh","-c","/start_canal_server.sh"]
        #command: ['cat']
        #tty: true
        ports:
          - containerPort: 11111
            name: http
          - containerPort: 11112
            name: metrics
        env:
          - name: POD_IP
            valueFrom:
          fieldRef:
                fieldPath: status.podIP
        livenessProbe:
          failureThreshold: 8
          tcpSocket:
            port: 11110
          initialDelaySeconds: 30
          periodSeconds: 30
          successThreshold: 1
          timeoutSeconds: 3
#        livenessProbe:
#          httpGet:
#            path: /health
#            port: 11112 
#            scheme: HTTP
#          initialDelaySeconds: 60 
#          periodSeconds: 5
#          failureThreshold: 3
#          successThreshold: 1
#          timeoutSeconds: 5
#        readinessProbe:
#          httpGet:
#            path: /health 
#            port: 11112 
#            scheme: HTTP
#          initialDelaySeconds: 60 
#          periodSeconds: 5
#          failureThreshold: 3
#          successThreshold: 1
#          timeoutSeconds: 5
        resources:
          limits:
            cpu: "1"
            memory: 2Gi 
          requests:
            cpu: 250m
            memory: 512Mi 
        volumeMounts:
          - mountPath: /etc/localtime
            name: time
          - mountPath: /start_canal_server.sh
            name: canal-config
            subPath: start_canal_server.sh
          - name: logs
            mountPath: /home/admin/canal-server/logs
  volumes:
  - name: time
        hostPath:
          path: /etc/localtime
  - configMap:
         defaultMode: 511
         name: canal-config
        name: canal-config
  - emptyDir: {}
        name: logs

instance.properties配置

admin 管理界面添加Instance管理 

#################################################
## mysql serverId , v1.0.26+ will autoGen
#canal.instance.mysql.slaveId=1037

# enable gtid use true/false
canal.instance.gtidon=false

# position info
canal.instance.master.address=test.cp0.rds.amazonaws.com: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=false

# username/password
canal.instance.dbUsername=canal
canal.instance.dbPassword=Canal!123
canal.instance.connectionCharset = UTF-8
# enable druid Decrypt database password
canal.instance.enableDruid=false
#canal.instance.pwdPublicKey=MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBALK4BUxdDltRRE5/zXpVEVPUgunvscYFtEip3pmLlhrWpacX7y7GCMo2/JM6LeHmiiNdH1FWgGCpUfircSwlWKUCAwEAAQ==

#canal.instance.defaultDatabaseName = wealth_management

# table regex
#canal.instance.filter.regex=test\\..*
canal.instance.filter.regex=wealth_management\\.pay_order_request_extend,wealth_management\\.pay_order
canal.instance.filter.black.regex=


# mq config
canal.mq.topic=canal-db-wealth_management
canal.mq.partition=0

配置工作做好之后，可以启动Canal服务： 

# 查看服务日志
tail -100f /data/canal/logs/canal/canal

在test数据库创建一个订单表，并且执行几个简单的DML 

use `test`;

CREATE TABLE `order`
(
    id          BIGINT UNIQUE PRIMARY KEY AUTO_INCREMENT COMMENT '主键',
    order_id    VARCHAR(64)    NOT NULL COMMENT '订单ID',
    amount      DECIMAL(10, 2) NOT NULL DEFAULT 0 COMMENT '订单金额',
    create_time DATETIME       NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
    UNIQUE uniq_order_id (`order_id`)
) COMMENT '订单表';

INSERT INTO `order`(order_id, amount) VALUES ('10086', 999);
UPDATE `order` SET amount = 10087 WHERE order_id = '10086';
DELETE  FROM `order` WHERE order_id = '10086';

这个时候，可以利用Kafka的kafka-console-consumer或者Kafka Tools查看test这个topic的数据 

bin/kafka-console-consumer.sh --bootstrap-server 127.0.0.1:9092 --from-beginning --topic test

{"data":[{"id":"1","order_id":"10086","amount":"999.0","create_time":"2020-03-02 05:12:49"}],"database":"test","es":1583143969000,"id":3,"isDdl":false,"mysqlType":{"id":"BIGINT","order_id":"VARCHAR(64)","amount":"DECIMAL(10,2)","create_time":"DATETIME"},"old":null,"pkNames":["id"],"sql":"","sqlType":{"id":-5,"order_id":12,"amount":3,"create_time":93},"table":"order","ts":1583143969460,"type":"INSERT"}