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本文介紹了Kafka 連接設置以使用 AWS MSK 從 Aurora 發送記錄的處理方法，對大家解決問題具有一定的參考價值，需要的朋友們下面隨著小編來一起學習吧！

問題描述

我必須將記錄從 Aurora/Mysql 發送到 MSK，然后再從那里發送到 Elastic 搜索服務

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

極光表結構中的記錄是這樣的
我認為記錄將以這種格式發送到 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，為了通過彈性搜索使用，我需要使用正確的架構，因此我必須使用架構注冊表.

我的問題

問題 1

對于需要上述類型的消息架構注冊表，我應該如何使用架構注冊表?.我是否必須為此創建 JSON 結構，如果是，我將其保留在哪里.這里需要更多幫助才能理解這一點?

我已經編輯了

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

提到了zookeper，但我沒有提到什么是kafkastore.topic=_schema如何將其鏈接到自定義架構.

即使我開始并收到此錯誤

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

這是我所期待的，因為我沒有對架構做任何事情.

我確實安裝了 jdbc 連接器，當我啟動時出現以下錯誤

無效值 java.sql.SQLException:找不到適合 jdbc 的驅動程序:mysql://123871289-eruyre.cluster-ceyey.us-east-1.rds.amazonaws.com:3306/trf?user=admin&password=Welcome123 for configuration 無法打開與 jdbc 的連接:mysql://123871289-eruyre.cluster-ceyey.us-east-1.rds.amazonaws.com:3306/trf?user=admin&password=歡迎123無效值 java.sql.SQLException:找不到適合 jdbc 的驅動程序:mysql://123871289-eruyre.cluster-ceyey.us-east-1.rds.amazonaws.com:3306/trf?user=admin&password=Welcome123用于配置無法打開與 jdbc 的連接:mysql://123871289-eruyre.cluster-ceyey.us-east-1.rds.amazonaws.com:3306/trf?user=admin&password=Welcome123您還可以在端點 `/{connectorType}/config/validate` 找到上面的錯誤列表

問題 2我可以在一個 ec2 上創建兩個連接器嗎(jdbc 和彈性 serach 一個).如果是，我是否必須在 sepearte cli 中同時啟動?

問題 3當我打開 vim/usr/local/confluent/etc/kafka-connect-jdbc/source-quickstart-sqlite.properties我只看到像下面這樣的屬性值

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

在上面的屬性文件中，我可以提到架構名稱和表名稱嗎?

根據答案，我正在更新我的 Kafka 連接 JDBC 配置

--------------啟動JDBC連接彈性搜索------------------------------

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/須藤 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須藤 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屬性

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

最后我修改了

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

在這里我修改了以下屬性

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

當我列出主題時，我沒有看到任何為表名列出的主題.

錯誤信息的堆棧跟蹤

[2020-01-03 07:40:57,169] 錯誤未能為/usr/local/confluent/etc/kafka-connect-jdbc/source-quickstart-sqlite.properties (org.apache) 創建作業.kafka.connect.cli.ConnectStandalone:108)[2020-01-03 07:40:57,169] 連接器錯誤后停止錯誤 (org.apache.kafka.connect.cli.ConnectStandalone:119)java.util.concurrent.ExecutionException: org.apache.kafka.connect.runtime.rest.errors.BadRequestException: 連接器配置無效并包含以下 2 個錯誤:無效值 com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:通信鏈接失敗最后一個成功發送到服務器的數據包是 0 毫秒前.驅動程序沒有收到來自服務器的任何數據包.用于配置無法打開與 jdbc 的連接:mysql://****.us-east-1.rds.amazonaws.com:3306/trf無效值 com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:通信鏈接失敗最后一個成功發送到服務器的數據包是 0 毫秒前.驅動程序沒有收到來自服務器的任何數據包.用于配置無法打開與 jdbc 的連接:mysql://****.us-east-1.rds.amazonaws.com:3306/trf您還可以在端點 `/{connectorType}/config/validate` 找到上面的錯誤列表在 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:連接器配置無效并包含以下2個錯誤:無效值 com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:通信鏈接失敗最后一個成功發送到服務器的數據包是 0 毫秒前.驅動程序沒有收到來自服務器的任何數據包.用于配置無法打開與 jdbc 的連接:mysql://****.us-east-1.rds.amazonaws.com:3306/trf無效值 com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:通信鏈接失敗最后一個成功發送到服務器的數據包是 0 毫秒前.驅動程序沒有收到來自服務器的任何數據包.用于配置無法打開與 jdbc 的連接:mysql://****.us-east-1.rds.amazonaws.com:3306/trf您還可以在端點 `/{connectorType}/config/validate` 找到上面的錯誤列表在 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-" } }'

解決方案

是否需要架構注冊表?

沒有.您可以在 json 記錄中啟用模式.JDBC 源可以根據表信息為您創建

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

<塊引用>

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

如果你想使用 Schema Registry，你應該使用 kafkastore.bootstrap.servers.with Kafka 地址，而不是 Zookeeper.所以刪除 kafkastore.connection.url

請閱讀文檔所有屬性的解釋

<塊引用>

我沒有對架構做任何事情.

沒關系.模式主題在注冊表第一次啟動時被創建

<塊引用>

我可以在一個 ec2 上創建兩個連接器嗎

是(忽略可用的 JVM 堆空間).同樣，這在 Kafka Connect 文檔中有詳細說明.

使用獨立模式，您首先傳遞連接工作器配置，然后在一個命令中最多傳遞 N 個連接器屬性

使用分布式模式，您使用 Kafka Connect REST API

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

<塊引用>

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

首先，這是針對 Sqlite，而不是針對 Mysql/Postgres.您不需要使用快速入門文件，它們僅供參考

同樣，所有屬性都有詳細記錄

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

<塊引用>

我確實安裝了 jdbc 連接器，當我啟動時出現以下錯誤

這里有更多關于如何調試的信息

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

<小時>

如前所述，我個人建議盡可能使用 Debezium/CDC

用于 RDS Aurora 的 Debezium 連接器

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-" } }'

解決方案

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

這篇關于Kafka 連接設置以使用 AWS MSK 從 Aurora 發送記錄的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！

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Kafka 連接設置以使用 AWS MSK 從 Aurora 發送記錄

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