### ksqlDB Quick Start

Source: https://docs.confluent.io/platform/current/monitor/metrics-reporter.html

A step-by-step guide to getting started with ksqlDB, covering installation, running ksqlDB CLI, and executing basic queries.

```bash
# Ensure you have Kafka running and a topic named 'sensor-readings'
# Example: kafka-topics --create --topic sensor-readings --bootstrap-server localhost:9092 --partitions 1 --replication-factor 1

# Start the ksqlDB server (assuming Confluent Platform is installed)
# Navigate to your Confluent Platform installation directory
# Example: ./bin/ksql-server-start etc/ksql/server.properties

# Start the ksqlDB CLI in a separate terminal
# Example: ./bin/ksql http://localhost:8088

# Inside the ksqlDB CLI:

# Create a stream from the Kafka topic
ksql> CREATE STREAM sensor_stream (sensor_id VARCHAR, reading DOUBLE) WITH (kafka_topic='sensor-readings', value_format='json');

# Query the stream in real-time
ksql> SELECT * FROM sensor_stream WHERE reading > 30.0 EMIT CHANGES;

# Create a table for aggregations
ksql> CREATE TABLE temperature_averages AS
    -> SELECT sensor_id, AVG(reading) as avg_reading
    -> FROM sensor_stream
    -> WINDOW 1 MINUTE
    -> GROUP BY sensor_id;

# Query the table (will show results as they are updated)
ksql> SELECT * FROM temperature_averages EMIT CHANGES;

# To exit the CLI, type:
ksql> exit;

```

--------------------------------

### ksqlDB Cluster API Quick Start

Source: https://docs.confluent.io/cloud/current/multi-cloud/cluster-linking/mirror-topics-cc.html

This quick start guide demonstrates how to interact with the ksqlDB Cluster API. It provides examples for managing ksqlDB clusters programmatically, useful for automation and integration into CI/CD pipelines.

```Bash
# Example: List ksqlDB queries
curl -X GET http://localhost:8088/queries

# Example: Create a ksqlDB query
curl -X POST -d '{"ksql": "CREATE STREAM page_views (...);", "streamsProperties": {}}' http://localhost:8088/ksql

# Example: Terminate a ksqlDB query
curl -X POST -d '{"queryId": "query_123"}' http://localhost:8088/query_terminate

```

--------------------------------

### Go Kafka Client Examples

Source: https://docs.confluent.io/platform/current/security/authorization/rbac/rbac-cli-quickstart.html

Provides examples for implementing Kafka producers and consumers using the Go client library. This section guides developers on setting up and managing Kafka interactions in Go applications. The core dependency is the confluent-kafka-go library.

```markdown
[Go Client Examples](https://docs.confluent.io/kafka-clients/go/current/overview.html)
```

--------------------------------

### Create Example Directory

Source: https://docs.confluent.io/platform/current/multi-dc-deployments/replicator/replicator-quickstart.html

Creates a new directory named 'my-examples' to store configuration files and other example-related assets for Confluent Platform.

```bash
mkdir my-examples
```

--------------------------------

### Flink SQL Get Started

Source: https://docs.confluent.io/cloud/current/cp-component/ksql-cloud-config.html

Guides users through the initial setup and usage of Confluent Flink SQL, including quick start options.

```APIDOC
## Get Started

This section guides you through the initial steps of using Confluent Flink SQL. It includes various quick start options to help you begin processing data quickly.

### Endpoint

N/A

### Method

N/A

### Parameters

N/A

### Request Body

N/A

### Response

N/A
```

--------------------------------

### Starting the ksqlDB Server

Source: https://context7_llms

Instructions on how to start the ksqlDB server, including configuration and command-line usage.

```APIDOC
## Starting the ksqlDB Server

### Description
Provides instructions for starting the ksqlDB server, including configuration parameters and command-line execution.

### Overview
The ksqlDB servers run separately from the ksqlDB CLI client and Kafka brokers. Servers can be deployed on remote machines, VMs, or containers, and the CLI connects to these remote servers. Servers can be added or removed from the same resource pool during live operations for elastic scaling of query processing. Different resource pools can be used for workload isolation (e.g., production and testing).

Note: You can only connect to one ksqlDB server at a time. The ksqlDB CLI does not support automatic failover to another ksqlDB server.

![ksqlDB Client-Server Architecture](ksqlDB/images/client-server.png)

### Configuration

1.  **Specify Configuration Parameters:** You can set ksqlDB server configuration parameters, including any property for the Kafka Streams API, Kafka producer, or Kafka consumer. The required parameters are `bootstrap.servers` and `listeners`.
    *   Parameters can be specified in the ksqlDB properties file or the `KSQL_OPTS` environment variable.
    *   Properties set with `KSQL_OPTS` take precedence over those in the properties file.
    *   A recommended approach is to configure common properties using the ksqlDB configuration file and override specific properties as needed using the `KSQL_OPTS` environment variable.

    **Default Settings:**
    ```none
    bootstrap.servers=localhost:9092
    listeners=http://0.0.0.0:8088
    ```

    For more information, see [Configure ksqlDB Server](operate-and-deploy/installation/server-config.md#ksqldb-install-configure-server).

### Starting the Server

Use the `ksql-server-start` script with the following command:

```bash
ksql-server-start ${CONFLUENT_HOME}/etc/ksqldb/ksql-server.properties
```

### Non-Interactive Mode

For instructions on running ksqlDB in non-interactive (headless) mode, refer to [this page](operate-and-deploy/installation/server-config.md#ksqldb-install-configure-server-non-interactive-usage).
```

--------------------------------

### Quick Start with Java Table API

Source: https://docs.confluent.io/cloud/current/clusters/create-cluster.html

Provides a quick start guide for using the Java Table API with Confluent Flink SQL. This section likely includes code examples demonstrating basic operations and setup.

```java
/*
 * Example code for Java Table API quick start.
 * This is a placeholder and would contain actual Java code.
 */
public class FlinkJavaQuickStart {
    public static void main(String[] args) throws Exception {
        // Flink execution environment setup
        // Table environment setup
        // Define source and sink
        // Perform transformations
        // Execute the job
        System.out.println("Flink Java Table API Quick Start Example");
    }
}
```

--------------------------------

### Get Started with Python Client for Kafka

Source: https://docs.confluent.io/platform/current/ksqldb/developer-guide/ksqldb-rest-api/index.html

Guide to using the Python client for Kafka. This documentation covers installation, configuration, and basic usage for Python-based Kafka applications.

```Python
https://docs.confluent.io/kafka-clients/python/current/overview.html
```

--------------------------------

### Confluent CLI: Install Quickstart Plugin (Shell)

Source: https://developer.confluent.io/tutorials/creating-first-apache-kafka-streams-application/confluent.html

Installs the 'confluent-quickstart' plugin for the Confluent CLI. This plugin helps streamline the creation of Confluent Cloud resources required for tutorials.

```shell
confluent plugin install confluent-quickstart
```

--------------------------------

### Start Kafka Broker

Source: https://docs.confluent.io/platform/current/get-started/tutorial-multi-broker.html

Starts a Kafka broker using the kafka-server-start script. This command requires the broker's properties file as an argument. Ensure the necessary environment variables are set before execution.

```bash
kafka-server-start $CONFLUENT_HOME/etc/kafka/broker-0.properties
kafka-server-start $CONFLUENT_HOME/etc/kafka/broker-1.properties
kafka-server-start $CONFLUENT_HOME/etc/kafka/broker-2.properties
```

--------------------------------

### Confluent CLI Navigation Links

Source: https://docs.confluent.io/confluent-cli/current/overview.html

This section lists navigation links for the Confluent CLI documentation. It includes links to getting started, installation, migration guides, configuration, connecting to Confluent Cloud, and a comprehensive command reference.

```html
<ul>
  <li><a href="#">Get Started</a></li>
  <li><a href="install.html">Install CLI</a></li>
  <li><a href="migrate.html">Update to CLI v4</a></li>
  <li><a href="cp-produce-consume.html">Configure and Manage</a></li>
  <li><a href="connect.html">Connect to Confluent Cloud</a></li>
  <li>
    <a href="command-reference/index.html">Command Reference</a>
    <ul>
      <li><a href="command-reference/overview.html">Overview</a></li>
      <li><a href="command-reference/confluent_ai.html">confluent ai</a></li>
      <li>
        <a href="command-reference/api-key/index.html">confluent api-key</a>
        <ul>
          <li><a href="command-reference/api-key/confluent_api-key_create.html">confluent api-key create</a></li>
          <li><a href="command-reference/api-key/confluent_api-key_delete.html">confluent api-key delete</a></li>
        </ul>
      </li>
    </ul>
  </li>
</ul>
```

--------------------------------

### Start ksqlDB Server Script

Source: https://context7_llms

This bash command initiates a ksqlDB server node. It requires the path to the ksqlDB server properties file, which should contain essential configurations like bootstrap.servers and listeners. Properties can be set in the file or via the KSQL_OPTS environment variable.

```bash
ksql-server-start ${CONFLUENT_HOME}/etc/ksqldb/ksql-server.properties
```

--------------------------------

### Example of CLASSPATH Export for Specific Connectors

Source: https://docs.confluent.io/kafka-connectors/self-managed/userguide.html

This example shows how to export the CLASSPATH environment variable to include plugin JAR files when starting a connector. This is a workaround for specific connectors that require it due to classloading isolation issues.

```shell
export CLASSPATH=<path-to-jar-files>
```

--------------------------------

### Confluent Platform Services Startup Output

Source: https://context7_llms

This example displays the typical output when starting Confluent Platform services using the `confluent local` command. It shows the status of each service as it comes online, indicating whether it is UP or not.

```bash
Starting KRaft Controller
KRaft Controller is [UP]
Starting Kafka
Kafka is [UP]
Starting Schema Registry
Schema Registry is [UP]
Starting Kafka REST
Kafka REST is [UP]
Starting Connect
Connect is [UP]
Starting ksqlDB Server
ksqlDB Server is [UP]
```

--------------------------------

### Tableflow Quick Start with Delta Lake Tables

Source: https://docs.confluent.io/cloud/current/networking/static-egress-ip-addresses.html

This section provides a quick start guide for using Tableflow to materialize streams into Delta Lake tables. Delta Lake offers ACID transactions and other features for reliable data warehousing on data lakes. The 'Quick Start with Delta Lake Tables' guide outlines the setup process.

```text
Learn how to materialize your streaming data into Delta Lake tables using Tableflow. This guide, 'Quick Start with Delta Lake Tables,' covers the essential steps for setting up this integration, enabling robust data warehousing capabilities on your data lake.
```

--------------------------------

### Control Center Active/Active Setup Examples (Ansible & CFK)

Source: https://docs.confluent.io/control-center/current/installation/overview.html

Provides links to GitHub repositories containing example configurations for setting up Control Center in an Active/Active high-availability mode. These examples cater to both Confluent Ansible and Confluent for Kubernetes (CFK) deployments.

```markdown
*   For a Confluent Ansible example of Control Center Active/Active high-availability setup, see: [GitHub repo](https://github.com/confluentinc/cp-ansible/tree/d31730fa1b14db2833c40ad7308e89de9f96b734/docs/sample_inventories/c3-next-gen-active-active-setup)
*   For CFK example of Control Center Active/Active high-availability setup, see: [GitHub repo](https://github.com/confluentinc/confluent-kubernetes-examples/tree/master/control-center-next-gen/plain-active-active-setup)
```

--------------------------------

### Confluent CLI: Install Quickstart Plugin

Source: https://developer.confluent.io/tutorials/creating-first-apache-kafka-streams-application/confluent.html

Installs the confluent-quickstart CLI plugin, which simplifies the creation of Confluent Cloud resources required for tutorials.

```bash
confluent plugin install confluent-quickstart
```

--------------------------------

### Create Kafka Topics

Source: https://docs.confluent.io/platform/current/get-started/tutorial-multi-broker.html

Commands to create Kafka topics with specified configurations. Includes creating topics with default partitions and replication factors, as well as custom settings.

```bash
kafka-topics --create --topic cool-topic --bootstrap-server localhost:9092
kafka-topics --create --topic warm-topic --bootstrap-server localhost:9092
kafka-topics --create --topic hot-topic --partitions 2 --replication-factor 2 --bootstrap-server localhost:9092
```

--------------------------------

### Tableflow: Get Started with Managed Storage

Source: https://docs.confluent.io/cloud/current/sr/sr-rest-apis.html

Provides a quick start guide for using Tableflow with managed storage. This helps users rapidly set up data pipelines for AI/ML workloads.

```text
Overview
Quick Start with Managed Storage
Quick Start Using Your Storage and AWS Glue
Quick Start with Delta Lake Tables
```

--------------------------------

### Create Directory for Examples

Source: https://docs.confluent.io/platform/current/multi-dc-deployments/cluster-linking/configs.html

Creates a new directory named 'my-examples' within the current directory. This directory will be used to store all example files for the tutorial.

```shell
mkdir my-examples
```

--------------------------------

### Start Replicator with connect-standalone (Bash)

Source: https://context7_llms

This command starts the Replicator using connect-standalone, referencing the properties files for configuration. It's a basic example, and the specific command may vary based on your setup. Refer to the Confluent documentation for detailed configuration and execution instructions.

```bash
connect-standalone ${CONFLUENT_HOME}/etc/kafka/connect-standalone.properties \
   ${CONFLUENT_HOME}/etc/kafka-connect-replicator/quickstart-replicator.properties
```

--------------------------------

### Run Java Kafka Producer Example

Source: https://docs.confluent.io/platform/current/schema-registry/schema_registry_onprem_tutorial.html

This section details the command-line execution of a Java Kafka producer example. It includes steps for compiling the project using Maven, verifying message production in Confluent Control Center, and running the producer with specific arguments pointing to a configuration file.

```bash
mvn clean compile package

mvn exec:java -Dexec.mainClass=io.confluent.examples.clients.basicavro.ProducerExample \
  -Dexec.args="$HOME/.confluent/java.config"
```

--------------------------------

### Quick Start Flink SQL with Python Table API

Source: https://docs.confluent.io/cloud/current/stream-governance/packages.html

This guide provides a quick start for using Flink SQL with the Python Table API. It demonstrates basic setup and usage for processing data streams.

```python
from pyflink.table import Environment, EnvironmentSettings

settings = EnvironmentSettings.in_batch_mode()
# For streaming, use EnvironmentSettings.in_streaming_mode()
table_env = Environment.create_with_settings(settings)

# Example: Create a table from a source and perform a query
# table_env.execute_sql("CREATE TABLE ...")
# table_env.execute_sql("SELECT ... FROM ...")
print("Flink Python Table API Quick Start example.")
```

--------------------------------

### Quick Start with Python Table API

Source: https://docs.confluent.io/cloud/current/clusters/create-cluster.html

Offers a quick start guide for the Python Table API within Confluent Flink SQL. It includes Python code snippets for initial setup and common tasks.

```python
# Example code for Python Table API quick start.
# This is a placeholder and would contain actual Python code.

from pyflink.datastream import StreamExecutionEnvironment
from pyflink.table import StreamTableEnvironment

def main():
    # Flink execution environment setup
    env = StreamExecutionEnvironment.get_execution_environment()
    # Table environment setup
    t_env = StreamTableEnvironment.create(env)
    
    # Define source and sink
    # Perform transformations
    # Execute the job
    print("Flink Python Table API Quick Start Example")

if __name__ == '__main__':
    main()
```

--------------------------------

### Initialize ksql-migrations Project

Source: https://context7_llms

Command to create a new ksql-migrations project, setting up the necessary directory structure and configuration file. It requires the project path and the ksqlDB server URL as arguments.

```none
ksql-migrations new-project [--] <project-path> <ksql-server-url>
```

```bash
ksql-migrations new-project /my/migrations/project/path http://localhost:8088
```

```none
Creating new migrations project at /my/migrations/project/path
Creating directory: /my/migrations/project/path
Creating directory: /my/migrations/project/path/migrations
Creating file: /my/migrations/project/path/ksql-migrations.properties
Writing to config file: ksql.server.url=http://localhost:8088
...
Migrations project directory created successfully
Execution time: 0.0080 seconds
```

--------------------------------

### Use FileConfigProvider in Connector Configuration (JDBC Example)

Source: https://docs.confluent.io/kafka-connectors/self-managed/userguide.html

This example demonstrates how to use variables referencing values from a properties file managed by FileConfigProvider within a JDBC connector configuration. The secrets are stored in '/opt/connect-secrets.properties'.

```properties
# Additional properties added to the connector configuration

connection.url=${file:/opt/connect-secrets.properties:productsdb-url}
connection.user=${file:/opt/connect-secrets.properties:productsdb-username}
connection.password=${file:/opt/connect-secrets.properties:productsdb-password}
```

--------------------------------

### Get Schema by Version Response Example (AVRO)

Source: https://docs.confluent.io/platform/current/schema-registry/develop/api.html

An example HTTP response for retrieving an AVRO schema. It details the schema's subject, ID, version, the schema definition itself, GUID, timestamp, and deletion status.

```json
HTTP/1.1 200 OK
Content-Type: application/vnd.schemaregistry.v1+json

{
  "subject": "test",
  "id": 1,
  "version": 1,
  "schema": "{\"type\": \"string\"}",
  "guid": "test:1",
  "ts": 1696522845123,
  "deleted": false
}
```

--------------------------------

### Confluent CLI Commands for Quick Start

Source: https://docs.confluent.io/confluent-cli/current/overview.html

This snippet includes essential Confluent CLI commands for getting started with Confluent Cloud. It covers signing up for an account, starting the interactive shell, logging in, creating a Kafka cluster, creating a topic, and generating an API key. These commands are executed directly in the terminal.

```bash
confluent cloud-signup
confluent shell
login
kafka cluster create <name> --cloud <cloud provider> --region <cloud region>
kafka topic create <name> --cluster <cluster ID>
api-key create --resource <cluster ID>
```

--------------------------------

### Compile and Run Java Kafka Producer Example using Maven

Source: https://docs.confluent.io/platform/current/schema-registry/schema_registry_tutorial.html

This section provides the Maven commands to compile, package, and execute a Java Kafka producer example. It also guides the user on how to verify message production using Confluent Control Center. The execution command requires passing the path to a configuration file.

```bash
# Compile and package the project
mvn clean compile package

# Run the producer example, replacing path to config file as needed
mvn exec:java -Dexec.mainClass="io.confluent.examples.clients.basicavro.ProducerExample" \
  -Dexec.args="$HOME/.confluent/java.config"
```

--------------------------------

### Set up Source Cluster Configuration Files

Source: https://docs.confluent.io/platform/current/multi-dc-deployments/cluster-linking/topic-data-sharing.html

This snippet demonstrates how to set up the necessary configuration files for a Confluent Platform source cluster. It involves changing directories, creating a new directory for examples, copying a default server properties file, and renaming it.

```bash
cd $CONFLUENT_HOME
mkdir my-examples
cp etc/kafka/server.properties my-examples/server-src.properties
```

--------------------------------

### Confluent Cloud Navigation Links (HTML)

Source: https://docs.confluent.io/cloud/current/quotas/index.html

Provides a hierarchical navigation structure for Confluent Cloud documentation. It includes links to overview, getting started guides, quick starts, and tutorials, organized using nested unordered lists.

```html
Version

CLOUD

*   [Overview](../overview.html)
*   [Get Started](../get-started/overview.html)
    *   [Overview](../get-started/confluent-cloud-basics.html)
    *   [Quick Start](../get-started/index.html)
    *   [REST API Quick Start](../kafka-rest/krest-qs.html)
    *   [Manage Schemas](../get-started/schema-registry.html)
    *   [Deploy Free Clusters](../get-started/free-trial.html)
    *   [Tutorials and Examples](../get-started/tutorials/overview.html)
        *   [Overview](../get-started/tutorials/index.html)
```

--------------------------------

### Example CMF Installation with Encryption

Source: https://context7_llms

This example shows the complete process of generating an encryption key, creating a Kubernetes secret for it, and then installing CMF using Helm with the specified encryption settings. It also includes the CMF version and chart repository.

```bash
openssl rand -out cmf.key 32kubectl create secret generic cmf-encryption-key \
  --from-file=encryption-key=cmf.key \
  -n confluent
helm upgrade --install cmf --version "~2.1.0" \
          confluentinc/confluent-manager-for-apache-flink \
          --namespace confluent \
          --set encryption.key.kubernetesSecretName=cmf-encryption-key \
          --set encryption.key.kubernetesSecretProperty=encryption-key
```

--------------------------------

### Get Schema by Version Response Example (PROTOBUF)

Source: https://docs.confluent.io/platform/current/schema-registry/develop/api.html

An example HTTP response for retrieving a PROTOBUF schema. It includes the schema's subject, ID, version, schema type, the schema definition, GUID, timestamp, and deletion status.

```json
HTTP/1.1 200 OK
Content-Type: application/vnd.schemaregistry.v1+json

{
  "subject": "test",
  "id": 1,
  "version": 1,
  "schemaType": "PROTOBUF",
  "schema": "{\"type\": \"string\"}",
  "guid": "test:1",
  "ts": 1696522845123,
  "deleted": false
}
```

--------------------------------

### Install Confluent Platform using ZIP and TAR archives

Source: https://docs.confluent.io/platform/current/ksqldb/operate-and-deploy/installation/avro-schema.html

This guide explains the manual installation of Confluent Platform using ZIP and TAR archives. It covers downloading the archives, extracting them, and performing initial configuration steps. This method provides granular control over the installation process and is suitable for users who prefer manual setup.

```Shell
# Download the Confluent Platform archive
curl -L "https://packages.confluent.io/archive/7.5/confluent-platform-enterprise-7.5.0-2.7.0.zip" -o confluent-platform-enterprise-7.5.0-2.7.0.zip

# Extract the archive
unzip confluent-platform-enterprise-7.5.0-2.7.0.zip -d /path/to/installation/directory

# Navigate to the installation directory
cd /path/to/installation/directory/confluent-platform-enterprise-7.5.0

# Start Zookeeper and Kafka
./bin/confluent start zookeeper kafka
...
```