Thank you for the tutorial. However, could you please add the article link used in this video? The attached link in the description seems to be redirecting to another blog.
I'm facing a issue while starting consumer warning: using default BROKER_ID=1, which is valid only for non clustered installations. The ZOOKEEPER_CONNECT variable must be set or the container must be linked to that runs zookeeper
Quick question here - Do I need to follow the same pattern here if I want to replicate the data from Postgres databse to snowflake data warehouse ? I would like to remove Kafka component and just write the changes into a log text file using debizium and then I will have custom python process for loading those tiny text files to S3 then to snowflake. Is this possible or Kafka integration is mandatory ? I am very new to debizium and Postgres integration , please help me if you can to answer above question ? THANKS!
Yes you need kafka. It goes like this: Postgres DB gets updated -> Debizium captures that change and sends all the information to the kafka message bus -> Your python application will be listening to kafka (consuming the kafka topic) for these messages, the take their contents and do whatever with them; in your case putting it into snowflake.
curl -H "Accept:application/json" localhost:8083/connectors/ curl: (7) Failed to connect to localhost port 8083: Connection refused getting above error in the docker, what is need to be done?
one of 2 things 1. wait for a few minutes before retrying, 2. check if the docker container is running using docker ps and look for a container named connect, if its not there then that means you have not started the container
1. postgres: this will be your application database so standard DB pattern 2. Apache Kafka: this will be a cluster with data so this must be up always, You can do a rolling upgrade for Kafka 3. Debezium: this is a kafka connector which runs natively on Kafka, so once registered the cluster will store the connector settings and metadata, hence these workers will be stateless. Hope this helps :)
You can use kafka sink connectors to write to your db. The db has to support a JDBC connection, ref: docs.confluent.io/kafka-connect-jdbc/current/sink-connector/index.html
I am getting below error when i try to execute curl -H "Accept:application/json" localhost:8083/connectors/ curl: (7) Failed to connect to localhost port 8083: Connection refused curl: (3) [globbing] bad range in column 2
Is it possible to capture Alter table changes with debezium in postgres? If yes, how can I set it up. Because right now I can only stream DML changes and no DDL.
AFAIK it is not currently possible in pg. debezium.io/documentation/reference/1.3/connectors/postgresql.html There are some pg ddl log parsers which you will need to modify to capture the DDL changes eg) debezium.io/blog/2016/04/15/parsing-ddl/ Another option is to just use a 3rd party tool like Fivetran that does this automatically for you, but as with everything you will need to weigh the tradeoffs. Hope this helps :)
CDC is the name of the software design pattern, where we create an event for every single change. Kafka is the tool used in CDC through which we transmit this change to another system.
Can you select specific columns in debezium that you would like to push to Kafka topic instead of all the columns from the table? Also, what's the alternative to do this if you have to do the same thing with was services
The fact that you have to use debezium''s build is off putting. One should be able to apply changes to standard postgres container instead of using debezium provided blob.
I followed article precisely but always I am getting: "Error while fetching metadata with correlation id 10 : {bankserver1.bank.holding=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)"
hi, here's the final curl that works for powershell.. but now the error is changing curl.exe -i -X POST localhost/connectors/ -H "Accept:application/json" -H "Content-Type:application/json" -d '{\"name\": \"sde-connector\", \"config\": {\"connector.class\": \"io.debezium.connector.postgresql.PostgresConnector\", \"database.dbname\": \"start_data_engineer\", \"database.hostname\": \"postgres\", \"database.password\": \"admin\", \"database.port\": \"5432\", \"database.server.name\": \"bankserver1\", \"database.user\": \"postgres\", \"table.whitelist\": \"bank.holding\"}}'
Edit for 10:06 Kafka Broker is one server within the kafka cluster. There can be multiple brokers within the kafka cluster.
Nice example! My main feedback would be to use docker compose as opposed to a bunch of docker run statements
Does this your comment make you feel smarter?
This is very useful. Many thanks.
Nice video, do you have an example for Spring boot with Apache kafka and Debezium connector(MySQL, MS SQL Server)?
Thank you for the tutorial. However, could you please add the article link used in this video? The attached link in the description seems to be redirecting to another blog.
Awesome learning
I'm facing a issue while starting consumer warning: using default BROKER_ID=1, which is valid only for non clustered installations. The ZOOKEEPER_CONNECT variable must be set or the container must be linked to that runs zookeeper
is there a way of using CDC with Rabbit instead of Kafka ?
I am able not fetch any messages using a consumer. It keeps waiting for a while but no response from consumer. Can anyone help?
Quick question here -
Do I need to follow the same pattern here if I want to replicate the data from Postgres databse to snowflake data warehouse ?
I would like to remove Kafka component and just write the changes into a log text file using debizium and then I will have custom python process for loading those tiny text files to S3 then to snowflake.
Is this possible or Kafka integration is mandatory ?
I am very new to debizium and Postgres integration , please help me if you can to answer above question ?
THANKS!
Yes you need kafka. It goes like this: Postgres DB gets updated -> Debizium captures that change and sends all the information to the kafka message bus -> Your python application will be listening to kafka (consuming the kafka topic) for these messages, the take their contents and do whatever with them; in your case putting it into snowflake.
I'm coming back to this now and wondering, why are you using pgcli and not psql?
You can use psql as well. I used pgcli for its autocomplete and syntax highlighting.
@@startdataengineering okay thanks 👍
curl -H "Accept:application/json" localhost:8083/connectors/ curl: (7) Failed to connect to localhost port 8083: Connection refused
getting above error in the docker, what is need to be done?
one of 2 things 1. wait for a few minutes before retrying, 2. check if the docker container is running using docker ps and look for a container named connect, if its not there then that means you have not started the container
What is your deployment strategy for a system as such?
1. postgres: this will be your application database so standard DB pattern
2. Apache Kafka: this will be a cluster with data so this must be up always, You can do a rolling upgrade for Kafka
3. Debezium: this is a kafka connector which runs natively on Kafka, so once registered the cluster will store the connector settings and metadata, hence these workers will be stateless.
Hope this helps :)
is there a reliable kafka consumer from debezium itself to consume from the topic and write to a new db?
You can use kafka sink connectors to write to your db. The db has to support a JDBC connection, ref: docs.confluent.io/kafka-connect-jdbc/current/sink-connector/index.html
I am getting below error when i try to execute curl -H "Accept:application/json" localhost:8083/connectors/ curl: (7) Failed to connect to localhost port 8083: Connection refused
curl: (3) [globbing] bad range in column 2
bro, i'm not sure but u should try to use your wlo or eth ip address
Is it possible to capture Alter table changes with debezium in postgres? If yes, how can I set it up. Because right now I can only stream DML changes and no DDL.
AFAIK it is not currently possible in pg. debezium.io/documentation/reference/1.3/connectors/postgresql.html
There are some pg ddl log parsers which you will need to modify to capture the DDL changes eg) debezium.io/blog/2016/04/15/parsing-ddl/
Another option is to just use a 3rd party tool like Fivetran that does this automatically for you, but as with everything you will need to weigh the tradeoffs. Hope this helps :)
What is the difference between this CDC and Kafka Stream? They are all fundamentally logging every single change?
CDC is the name of the software design pattern, where we create an event for every single change. Kafka is the tool used in CDC through which we transmit this change to another system.
@@startdataengineering How can I transmit this change to another pg instances
Hello when want to start stream.py to holding.txt
i got permission denied, pipeline broken. how can i fix that?
chmod +x steram.py
startdataengineering website is down can you please check
hmm weird, must have been a temporary outage. www.startdataengineering.com/ is currently running.
Can you select specific columns in debezium that you would like to push to Kafka topic instead of all the columns from the table? Also, what's the alternative to do this if you have to do the same thing with was services
yes you can by defining custom config for table's columns - for eg usecase -> blacklisting or masking some custom logic for some of the PII details.
Deletes aren't working. If I perform DELETE in MySQL, the same isn't being updated on Elasticsearch. Why could this be?
maybe it's related to that "replica identify FULL" mentioned in 9:20
The fact that you have to use debezium''s build is off putting. One should be able to apply changes to standard postgres container instead of using debezium provided blob.
I followed article precisely but always I am getting:
"Error while fetching metadata with correlation id 10 : {bankserver1.bank.holding=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)"
hi, here's the final curl that works for powershell.. but now the error is changing
curl.exe -i -X POST localhost/connectors/ -H "Accept:application/json" -H "Content-Type:application/json" -d '{\"name\": \"sde-connector\", \"config\": {\"connector.class\": \"io.debezium.connector.postgresql.PostgresConnector\", \"database.dbname\": \"start_data_engineer\", \"database.hostname\": \"postgres\", \"database.password\": \"admin\", \"database.port\": \"5432\", \"database.server.name\": \"bankserver1\", \"database.user\": \"postgres\", \"table.whitelist\": \"bank.holding\"}}'
my current error is {"error_code":500,"message":"Could not create PG connection"}
turned out the real error is
Caused by: org.postgresql.util.PSQLException: FATAL: database "start_data_engineer" does not exist