Kafka 连接设置以使用 AWS MSK 从 Aurora 发送记录

问题描述

我必须将记录从 Aurora/Mysql 发送到 MSK，然后再从那里发送到 Elastic 搜索服务

Aurora -->Kafka-connect--->AWS MSK--->kafka connect --->弹性搜索

极光表结构中的记录是这样的
我认为记录将以这种格式发送到 AWS MSK.

"o36347-5d17-136a-9749-Oe46464",0,"NEW_CASE","WRLDCHK","o36347-5d17-136a-9749-Oe46464","<?0xml version=""1"" encoding=""UTF-8"" standalone=""yes""?><caseCreatedPayload><batchDetails/>","CASE",08-JUL-17 10.02.32.217000000 PM,"TIME","UTC","ON","0a348753-5d1e-17a2-9749-3345,MN4,","","0a348753-5d1e-17af-9749-FGFDGDFV","EOUHEORHOE","2454-38d179749-setwr23424","","","",,"","",""

因此，为了通过弹性搜索使用，我需要使用正确的架构，因此我必须使用架构注册表.

我的问题

问题 1

对于需要上述类型的消息架构注册表，我应该如何使用架构注册表?.我是否必须为此创建 JSON 结构，如果是，我将其保留在哪里.这里需要更多帮助才能理解这一点?

我已经编辑了

vim/usr/local/confluent/etc/schema-registry/schema-registry.properties

提到了zookeper，但我没有提到什么是kafkastore.topic=_schema如何将其链接到自定义架构.

即使我开始并收到此错误

Caused by: java.util.concurrent.ExecutionException: org.apache.kafka.common.errors.TimeoutException: Topic _schemas 在 60000 ms 后不存在于元数据中.

这是我所期待的，因为我没有对架构做任何事情.

我确实安装了 jdbc 连接器，当我启动时出现以下错误

无效值 java.sql.SQLException:找不到适合 jdbc 的驱动程序:mysql://123871289-eruyre.cluster-ceyey.us-east-1.rds.amazonaws.com:3306/trf?user=admin&password=Welcome123 for configuration 无法打开与 jdbc 的连接:mysql://123871289-eruyre.cluster-ceyey.us-east-1.rds.amazonaws.com:3306/trf?user=admin&password=欢迎123无效值 java.sql.SQLException:找不到适合 jdbc 的驱动程序:mysql://123871289-eruyre.cluster-ceyey.us-east-1.rds.amazonaws.com:3306/trf?user=admin&password=Welcome123用于配置无法打开与 jdbc 的连接:mysql://123871289-eruyre.cluster-ceyey.us-east-1.rds.amazonaws.com:3306/trf?user=admin&password=Welcome123您还可以在端点 `/{connectorType}/config/validate` 找到上面的错误列表

问题 2我可以在一个 ec2 上创建两个连接器吗(jdbc 和弹性 serach 一个).如果是，我是否必须在 sepearte cli 中同时启动?

问题 3当我打开 vim/usr/local/confluent/etc/kafka-connect-jdbc/source-quickstart-sqlite.properties我只看到像下面这样的属性值

name=test-source-sqlite-jdbc-autoincrementconnector.class=io.confluent.connect.jdbc.JdbcSourceConnector任务.max=1connection.url=jdbc:mysql://123871289-eruyre.cluster-ceyey.us-east-1.rds.amazonaws.com:3306/trf?user=admin&password=Welcome123模式=递增递增.column.name=idtopic.prefix=trf-aurora-fspaudit-

在上面的属性文件中，我可以提到架构名称和表名称吗?

根据答案，我正在更新我的 Kafka 连接 JDBC 配置

--------------启动JDBC连接弹性搜索------------------------------

wget/usr/local http://packages.confluent.io/archive/5.2/confluent-5.2.0-2.11.tar.gz -P ~/Downloads/tar -zxvf ~/Downloads/confluent-5.2.0-2.11.tar.gz -C ~/Downloads/须藤 mv ~/Downloads/confluent-5.2.0/usr/local/confluentwget https://cdn.mysql.com//Downloads/Connector-J/mysql-connector-java-5.1.48.tar.gztar -xzf mysql-connector-java-5.1.48.tar.gz须藤 mv mysql-connector-java-5.1.48 mv/usr/local/confluent/share/java/kafka-connect-jdbc

然后

vim/usr/local/confluent/etc/kafka-connect-jdbc/source-quickstart-sqlite.properties

然后我修改了下面的属性

connection.url=jdbc:mysql://fdgfgdfgrter.us-east-1.rds.amazonaws.com:3306/trf模式=递增connection.user=adminconnection.password=Welcome123table.whitelist=PANStatementInstanceLogschema.pattern=dbo

最后我修改了

vim/usr/local/confluent/etc/kafka/connect-standalone.properties

在这里我修改了以下属性

bootstrap.servers=b-3.205147-ertrtr.erer.c5.ertert.us-east-1.amazonaws.com:9092,b-6.ertert-riskaudit.ertet.c5.kafka.us-East-1.amazonaws.com:9092,b-1.ertert-riskaudit.ertert.c5.kafka.us-east-1.amazonaws.com:9092key.converter.schemas.enable=truevalue.converter.schemas.enable=trueoffset.storage.file.filename=/tmp/connect.offsetsoffset.flush.interval.ms=10000plugin.path=/usr/local/confluent/share/java

当我列出主题时，我没有看到任何为表名列出的主题.

错误信息的堆栈跟踪

[2020-01-03 07:40:57,169] 错误未能为/usr/local/confluent/etc/kafka-connect-jdbc/source-quickstart-sqlite.properties (org.apache) 创建作业.kafka.connect.cli.ConnectStandalone:108)[2020-01-03 07:40:57,169] 连接器错误后停止错误 (org.apache.kafka.connect.cli.ConnectStandalone:119)java.util.concurrent.ExecutionException: org.apache.kafka.connect.runtime.rest.errors.BadRequestException: 连接器配置无效并包含以下 2 个错误:无效值 com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:通信链接失败最后一个成功发送到服务器的数据包是 0 毫秒前.驱动程序没有收到来自服务器的任何数据包.用于配置无法打开与 jdbc 的连接:mysql://****.us-east-1.rds.amazonaws.com:3306/trf无效值 com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:通信链接失败最后一个成功发送到服务器的数据包是 0 毫秒前.驱动程序没有收到来自服务器的任何数据包.用于配置无法打开与 jdbc 的连接:mysql://****.us-east-1.rds.amazonaws.com:3306/trf您还可以在端点 `/{connectorType}/config/validate` 找到上面的错误列表在 org.apache.kafka.connect.util.ConvertingFutureCallback.result(ConvertingFutureCallback.java:79)在 org.apache.kafka.connect.util.ConvertingFutureCallback.get(ConvertingFutureCallback.java:66)在 org.apache.kafka.connect.cli.ConnectStandalone.main(ConnectStandalone.java:116)引起:org.apache.kafka.connect.runtime.rest.errors.BadRequestException:连接器配置无效并包含以下2个错误:无效值 com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:通信链接失败最后一个成功发送到服务器的数据包是 0 毫秒前.驱动程序没有收到来自服务器的任何数据包.用于配置无法打开与 jdbc 的连接:mysql://****.us-east-1.rds.amazonaws.com:3306/trf无效值 com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:通信链接失败最后一个成功发送到服务器的数据包是 0 毫秒前.驱动程序没有收到来自服务器的任何数据包.用于配置无法打开与 jdbc 的连接:mysql://****.us-east-1.rds.amazonaws.com:3306/trf您还可以在端点 `/{connectorType}/config/validate` 找到上面的错误列表在 org.apache.kafka.connect.runtime.AbstractHerder.maybeAddConfigErrors(AbstractHerder.java:423)在 org.apache.kafka.connect.runtime.standalone.StandaloneHerder.putConnectorConfig(StandaloneHerder.java:188)在 org.apache.kafka.connect.cli.ConnectStandalone.main(ConnectStandalone.java:113)curl -X POST -H "Accept:application/json" -H "Content-Type:application/json" IPaddressOfKCnode:8083/connectors/-d '{"name": "emp-connector", "config": { "connector.class": "io.confluent.connect.jdbc.JdbcSourceConnector", "tasks.max": "1", "connection.url": "jdbc:mysql://IPaddressOfLocalMachine:3306/test_db?user=root&password=pwd","table.whitelist": "emp","mode": "timestamp","topic.prefix": "mysql-" } }'

是否需要架构注册表?

没有.您可以在 json 记录中启用模式.JDBC 源可以根据表信息为您创建

value.converter=org.apache.kafka...JsonConvertervalue.converter.schemas.enable=true

<块引用>

提到了zookeper，但我不知道什么是kafkastore.topic=_schema

如果你想使用 Schema Registry，你应该使用 kafkastore.bootstrap.servers.with Kafka 地址，而不是 Zookeeper.所以删除 kafkastore.connection.url

请阅读文档 所有属性的解释

我没有对架构做任何事情.

没关系.模式主题在注册表第一次启动时被创建

我可以在一个 ec2 上创建两个连接器吗

是(忽略可用的 JVM 堆空间).同样，这在 Kafka Connect 文档中有详细说明.

使用独立模式，您首先传递连接工作器配置，然后在一个命令中最多传递 N 个连接器属性

使用分布式模式，您使用 Kafka Connect REST API

https://docs.confluent.io/current/connect/managing/configuring.html

当我打开 vim/usr/local/confluent/etc/kafka-connect-jdbc/source-quickstart-sqlite.properties

首先，这是针对 Sqlite，而不是针对 Mysql/Postgres.您不需要使用快速入门文件，它们仅供参考

同样，所有属性都有详细记录

https://docs.confluent.io/current/connect/kafka-connect-jdbc/index.html#connect-jdbc

我确实安装了 jdbc 连接器，当我启动时出现以下错误

这里有更多关于如何调试的信息

https://www.confluent.io/blog/kafka-connect-deep-dive-jdbc-source-connector/

如前所述，我个人建议尽可能使用 Debezium/CDC

用于 RDS Aurora 的 Debezium 连接器

I have to send records from Aurora/Mysql to MSK and from there to Elastic search service

Aurora -->Kafka-connect--->AWS MSK--->kafka connect --->Elastic search

The record in Aurora table structure is something like this
I think record will go to AWS MSK in this format.

"o36347-5d17-136a-9749-Oe46464",0,"NEW_CASE","WRLDCHK","o36347-5d17-136a-9749-Oe46464","<?xml version=""1.0"" encoding=""UTF-8"" standalone=""yes""?><caseCreatedPayload><batchDetails/>","CASE",08-JUL-17 10.02.32.217000000 PM,"TIME","UTC","ON","0a348753-5d1e-17a2-9749-3345,MN4,","","0a348753-5d1e-17af-9749-FGFDGDFV","EOUHEORHOE","2454-5d17-138e-9749-setwr23424","","","",,"","",""

So in order to consume by elastic search i need to use proper schema so schema registry i have to use.

My question

Question 1

How should i use schema registry for above type of message schema registry is required ?. Do i have to create JSON structure for this and if yes where i have keep that. More help required here to understand this ?

I have edited

vim /usr/local/confluent/etc/schema-registry/schema-registry.properties

Mentioned zookeper but i did not what is kafkastore.topic=_schema How to link this to custom schema .

Even i started and got this error

Caused by: java.util.concurrent.ExecutionException: org.apache.kafka.common.errors.TimeoutException: Topic _schemas not present in metadata after 60000 ms.

Which i was expecting because i did not do anything about schema .

I do have jdbc connector installed and when i start i get below error

Invalid value java.sql.SQLException: No suitable driver found for jdbc:mysql://123871289-eruyre.cluster-ceyey.us-east-1.rds.amazonaws.com:3306/trf?user=admin&password=Welcome123 for configuration Couldn't open connection to jdbc:mysql://123871289-eruyre.cluster-ceyey.us-east-1.rds.amazonaws.com:3306/trf?user=admin&password=Welcome123
Invalid value java.sql.SQLException: No suitable driver found for jdbc:mysql://123871289-eruyre.cluster-ceyey.us-east-1.rds.amazonaws.com:3306/trf?user=admin&password=Welcome123 for configuration Couldn't open connection to jdbc:mysql://123871289-eruyre.cluster-ceyey.us-east-1.rds.amazonaws.com:3306/trf?user=admin&password=Welcome123
You can also find the above list of errors at the endpoint `/{connectorType}/config/validate`

Question 2 Can i create two onnector on one ec2 (jdbc and elastic serach one ).If yes do i have to start both in sepearte cli ?

Question 3 When i open vim /usr/local/confluent/etc/kafka-connect-jdbc/source-quickstart-sqlite.properties I see only propeties value like below

name=test-source-sqlite-jdbc-autoincrement
connector.class=io.confluent.connect.jdbc.JdbcSourceConnector
tasks.max=1
connection.url=jdbc:mysql://123871289-eruyre.cluster-ceyey.us-east-1.rds.amazonaws.com:3306/trf?user=admin&password=Welcome123
mode=incrementing
incrementing.column.name=id
topic.prefix=trf-aurora-fspaudit-

In the above properties file where i can mention schema name and table name?

Based on answer i am updating my configuration for Kafka connect JDBC

---------------start JDBC connect elastic search -----------------------------

wget /usr/local http://packages.confluent.io/archive/5.2/confluent-5.2.0-2.11.tar.gz -P ~/Downloads/
tar -zxvf ~/Downloads/confluent-5.2.0-2.11.tar.gz -C ~/Downloads/
sudo mv ~/Downloads/confluent-5.2.0 /usr/local/confluent

wget https://cdn.mysql.com//Downloads/Connector-J/mysql-connector-java-5.1.48.tar.gz
tar -xzf  mysql-connector-java-5.1.48.tar.gz
sudo mv mysql-connector-java-5.1.48 mv /usr/local/confluent/share/java/kafka-connect-jdbc

And then

vim /usr/local/confluent/etc/kafka-connect-jdbc/source-quickstart-sqlite.properties

Then i modified below properties

connection.url=jdbc:mysql://fdgfgdfgrter.us-east-1.rds.amazonaws.com:3306/trf
mode=incrementing
connection.user=admin
connection.password=Welcome123
table.whitelist=PANStatementInstanceLog
schema.pattern=dbo

Last i modified

vim /usr/local/confluent/etc/kafka/connect-standalone.properties

and here i modified below properties

bootstrap.servers=b-3.205147-ertrtr.erer.c5.ertert.us-east-1.amazonaws.com:9092,b-6.ertert-riskaudit.ertet.c5.kafka.us-east-1.amazonaws.com:9092,b-1.ertert-riskaudit.ertert.c5.kafka.us-east-1.amazonaws.com:9092
key.converter.schemas.enable=true
value.converter.schemas.enable=true
offset.storage.file.filename=/tmp/connect.offsets
offset.flush.interval.ms=10000
plugin.path=/usr/local/confluent/share/java

When i list topic i do not see any topic listed for table name .

Stack trace for the error message

[2020-01-03 07:40:57,169] ERROR Failed to create job for /usr/local/confluent/etc/kafka-connect-jdbc/source-quickstart-sqlite.properties (org.apache.kafka.connect.cli.ConnectStandalone:108)
[2020-01-03 07:40:57,169] ERROR Stopping after connector error (org.apache.kafka.connect.cli.ConnectStandalone:119)
java.util.concurrent.ExecutionException: org.apache.kafka.connect.runtime.rest.errors.BadRequestException: Connector configuration is invalid and contains the following 2 error(s):
Invalid value com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. for configuration Couldn't open connection to jdbc:mysql://****.us-east-1.rds.amazonaws.com:3306/trf
Invalid value com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. for configuration Couldn't open connection to jdbc:mysql://****.us-east-1.rds.amazonaws.com:3306/trf
You can also find the above list of errors at the endpoint `/{connectorType}/config/validate`
        at org.apache.kafka.connect.util.ConvertingFutureCallback.result(ConvertingFutureCallback.java:79)
        at org.apache.kafka.connect.util.ConvertingFutureCallback.get(ConvertingFutureCallback.java:66)
        at org.apache.kafka.connect.cli.ConnectStandalone.main(ConnectStandalone.java:116)
Caused by: org.apache.kafka.connect.runtime.rest.errors.BadRequestException: Connector configuration is invalid and contains the following 2 error(s):
Invalid value com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. for configuration Couldn't open connection to jdbc:mysql://****.us-east-1.rds.amazonaws.com:3306/trf
Invalid value com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. for configuration Couldn't open connection to jdbc:mysql://****.us-east-1.rds.amazonaws.com:3306/trf
You can also find the above list of errors at the endpoint `/{connectorType}/config/validate`
        at org.apache.kafka.connect.runtime.AbstractHerder.maybeAddConfigErrors(AbstractHerder.java:423)
        at org.apache.kafka.connect.runtime.standalone.StandaloneHerder.putConnectorConfig(StandaloneHerder.java:188)
        at org.apache.kafka.connect.cli.ConnectStandalone.main(ConnectStandalone.java:113)

        curl -X POST -H "Accept:application/json" -H "Content-Type:application/json" IPaddressOfKCnode:8083/connectors/ -d '{"name": "emp-connector", "config": { "connector.class": "io.confluent.connect.jdbc.JdbcSourceConnector", "tasks.max": "1", "connection.url": "jdbc:mysql://IPaddressOfLocalMachine:3306/test_db?user=root&password=pwd","table.whitelist": "emp","mode": "timestamp","topic.prefix": "mysql-" } }'

schema registry is required ?

No. You can enable schemas in json records. JDBC source can create them for you based on the table information

value.converter=org.apache.kafka...JsonConverter 
value.converter.schemas.enable=true

Mentioned zookeper but i did not what is kafkastore.topic=_schema

If you want to use Schema Registry, you should be using kafkastore.bootstrap.servers.with the Kafka address, not Zookeeper. So remove kafkastore.connection.url

Please read the docs for explanations of all properties

i did not do anything about schema .

Doesn't matter. The schemas topic gets created when the Registry first starts

Can i create two onnector on one ec2

Yes (ignoring available JVM heap space). Again, this is detailed in the Kafka Connect documentation.

Using standalone mode, you first pass the connect worker configuration, then up to N connector properties in one command

Using distributed mode, you use the Kafka Connect REST API

https://docs.confluent.io/current/connect/managing/configuring.html

When i open vim /usr/local/confluent/etc/kafka-connect-jdbc/source-quickstart-sqlite.properties

First of all, that's for Sqlite, not Mysql/Postgres. You don't need to use the quickstart files, they are only there for reference

Again, all properties are well documented

https://docs.confluent.io/current/connect/kafka-connect-jdbc/index.html#connect-jdbc

I do have jdbc connector installed and when i start i get below error

Here's more information about how you can debug that

https://www.confluent.io/blog/kafka-connect-deep-dive-jdbc-source-connector/

As stated before, I would personally suggest using Debezium/CDC where possible

Debezium Connector for RDS Aurora

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