ksql | Query Kubernetes API objects using SQL | REST library

by brendandburns JavaScript Version: Current License: No License

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kandi X-RAY | ksql Summary

ksql is a JavaScript library typically used in Web Services, REST applications. ksql has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Query Kubernetes API objects using SQL.

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Support

ksql has a low active ecosystem.

It has 130 star(s) with 8 fork(s). There are 7 watchers for this library.

It had no major release in the last 6 months.

There are 1 open issues and 2 have been closed. On average issues are closed in 2 days. There are 2 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of ksql is current.

Quality

ksql has no bugs reported.

Security

ksql has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

ksql does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

ksql releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

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ksql Key Features

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ksql Examples and Code Snippets

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Community Discussions

Trending Discussions on ksql

KSQL left join giving 'null' result even when data is present

-Xms option seems to ignored on gke but -Xmx is working

terraform How to pass a file as value for helm_release to create config map

How to enable ingress in minikube cluster for kafka-confluent

Kafka connect custom transforms to convert schema-less Json to Avro

Pass UDF method as parameter to other UDF in KSQL

Differentiate function name and function arguments in sql grammar

Kafka Streams Windowed Key to Human Readable

Connect PySpark to Kafka from Docker container

Dump table from Kafka into MariaDB with KSQL

QUESTION

KSQL left join giving 'null' result even when data is present

Asked 2021-Jun-13 at 10:41

I'm learning K-SQL/KSQL-DB and currently exploring joins. Below is the issue where I'm stuck.

I have 1 stream 'DRIVERSTREAMREPARTITIONEDKEYED' and one table 'COUNTRIES', below is their description.

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ANSWER

Answered 2021-Jun-13 at 10:41

For join to work it is our responsible to verify if the keys of both entities which are being joined lie in the same partition, KsqlDB can't verify whether the partitioning strategies are the same for both join inputs.

In my case My 'Drivers' topic had 2 partitions on which I had created a stream 'DriversStream' which in turn also had 2 partitions, but the table 'Countries' which I wanted to Join it with had only 1 partition, due to this I 're-keyed' the 'DriversStream' and created another stream 'DRIVERSTREAMREPARTITIONEDKEYED' shown in the question.

But the data of the table and the stream were not in the same partition hence the join was failing.

I created another topic with 1 partition 'DRIVERINFO'.

Source https://stackoverflow.com/questions/67862294

QUESTION

-Xms option seems to ignored on gke but -Xmx is working

Asked 2021-Jun-12 at 21:42

I'm running java application(ksqldb 0.15.0) on GKE cluster, and passed the java opts -Xms3G and -Xmx5G.

-Xmx option is working well, but -Xms options seems not to be effected.

The running command is as follows;

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ANSWER

Answered 2021-Mar-30 at 23:38

-Xms sets the initial heap size, not the minimum size.

NGCMN and OGCMN denote the minimum capacity of the new generation and the old generation respectively. These numbers are useless most of the time. What you probably wanted to look at is NGC/OGC - the current capacity of the new generation and the old generation.

You've set -Xms3G, and the current heap size is exactly

Source https://stackoverflow.com/questions/66867956

QUESTION

terraform How to pass a file as value for helm_release to create config map

Asked 2021-May-24 at 15:09

I have a helm chart that is creating a config map for which I am passing content as a value from terraform using helm_release.

values.yml: default is empty

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ANSWER

Answered 2021-May-24 at 15:09

I would use filebase64 to get the file with terraform to avoid templating issues. You can unmarshal it in helm like this: {{ b64dec .Values.sql_queries_file }}. By the way you should use data field in configMaps like this:

Source https://stackoverflow.com/questions/67411996

QUESTION

How to enable ingress in minikube cluster for kafka-confluent

Asked 2021-May-19 at 14:11

I searched for a solution to have confluentic-kafka work with ingress, and I reached this PR that did such implementation, but this PR isn't accepted (yet - the repository owner dropped and the repo doesn't exist any more).

So, I tried to implement something very simple as a proof of concept using as a reference this manual.

Currently I have ingress enabled:

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ANSWER

Answered 2021-May-19 at 14:11

It worked only when I started my minikube without a driver (to be created on the storage of the machine and not as a VM) and specifying the 9.x ingress network ip (to get it I ran: ip a):

Source https://stackoverflow.com/questions/67485178

QUESTION

Kafka connect custom transforms to convert schema-less Json to Avro

Asked 2021-Apr-05 at 14:00

I'm trying to build a system that reads json data(schema-less) from Kafka, converts it to avro and pushes it to s3.

I have been able to achieve the json to avro conversion using KStreams and KSQL. I was wondering if the same thing is possible using Kafka Connect's custom transforms.

This is what I have tried so far:

...

ANSWER

Answered 2021-Jan-06 at 05:52

The KafkaConnect custom transformer only needs to add a schema to the incoming JSON. The sink property format.class=io.confluent.connect.s3.format.avro.AvroFormat will take care of the rest.

Without a schema, the record value is a Map and with a schema it becomes a struct. I had to modify my code as below:

Source https://stackoverflow.com/questions/65517359

QUESTION

Pass UDF method as parameter to other UDF in KSQL

Asked 2021-Apr-01 at 14:12

I am implementing custom library (using UDFs) for KSQL engine and I wonder how to solve one of the issues I have.

I have defined a couple of UDFs which do something with parameters passed and return some output. Now, I need to pass those UDFs (their calls) into other UDF. So the structure would look like this:

SELECT * FROM stream s WHERE UDF_1(UDF_11(s.param1, s.param2), UDF_12(s.param3, s.param4), ...) EMIT CHANGES;

Is it possible to do define the UDF which takes other UDFs as arguments? If yes, how can I achieve it? If not, please share the idea you have on how I can solve the problem.

Thanks for any help in advance.

...

ANSWER

Answered 2021-Apr-01 at 14:12

I'm assuming you're asking about what the parameters for the method definition should be?

A UDF would return a single value, and the functions would be evaluated inside out, so they are not "taking UDFs as parameters", just the return value, which would generally be a primitive java type

For example, if you split a string column, then cast it to an int, that'd have to look like CAST(STRSPLIT(c, delim)[0] AS INT), where the cast operator takes any Object (here a string), and returns an integer, which could be passed further to more UDFs

Source https://stackoverflow.com/questions/66830666

QUESTION

Differentiate function name and function arguments in sql grammar

Asked 2021-Mar-23 at 13:21

With this grammar , I am trying to extract user written expressions from sql queries.

For example,from this query i'd like to extract FNAME,LName and name.

...

ANSWER

Answered 2021-Mar-23 at 13:21

If you look at the grammar, you can see the following parser rule for ``primaryExpression```

(It's referenced in the tree graph in your question):

Source https://stackoverflow.com/questions/66750399

QUESTION

Kafka Streams Windowed Key to Human Readable

Asked 2021-Mar-23 at 05:52

I am doing window aggregation on a kafka stream. It works fine and does correct aggregation. here's the code in scala. CallRecord is a case class.

...

ANSWER

Answered 2021-Mar-23 at 05:52

The solution I gave is the following. Apparently it was not very hard.

Source https://stackoverflow.com/questions/66312559

QUESTION

Connect PySpark to Kafka from Docker container

Asked 2021-Mar-21 at 09:38

I have a Kafka cluster that I'm managing with Docker.

I have a container where I'm running the broker and another one where I run the pyspark program which is supposed to connect to the kafka topic inside the broker container.

If I run the pyspark script in my local laptop everything runs perfectly but if I try to run the same code from inside the pyspark container I get the following error:

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ANSWER

Answered 2021-Mar-21 at 09:38

There are several problems in your setup:

You don't add the package for Kafka support as described in docs. It's either needs to be added when starting pyspark, or when initializing session, something like this (change 3.0.1 to version that is used in your jupyter container):

Source https://stackoverflow.com/questions/66725899

QUESTION

Dump table from Kafka into MariaDB with KSQL

Asked 2021-Mar-09 at 08:45

I am doing aggregation with KSQL and need to persist the output table in MariaDB. I have already set up MariaDB and the JdbcSinkConnector. Unfortunately, the sink just won't work for me.

This is the table's structure in KSQL, which I would like to dump in MariaDB:

...

ANSWER

Answered 2021-Mar-08 at 13:51

If you're using the JDBC Sink you need to be using a serialisation format for your data that includes the schema, e.g. using Avro, Protobuf, or JSON Schema.

In ksqlDB you can specify that when you create your object:

Source https://stackoverflow.com/questions/66529791

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