# Camel-Kafka-connector AWS2 Kinesis Firehose Sink

This is an example for Camel-Kafka-connector AWS2-Kinesis Firehose Sink 

## Standalone

### What is needed

- An AWS Kinesis Firehose delivery stream
- An S3 bucket
- Some work on the AWS console

### Running Kafka

```
$KAFKA_HOME/bin/zookeeper-server-start.sh config/zookeeper.properties
$KAFKA_HOME/bin/kafka-server-start.sh config/server.properties
$KAFKA_HOME/bin/kafka-topics.sh --create --bootstrap-server localhost:9092 --replication-factor 1 --partitions 1 --topic mytopic
```

### Setting up the needed bits and running the example

You'll need to setup the plugin.path property in your kafka

Open the `$KAFKA_HOME/config/connect-standalone.properties`

and set the `plugin.path` property to your choosen location

In this example we'll use `/home/oscerd/connectors/`

```
> cd /home/oscerd/connectors/
> wget https://repo1.maven.org/maven2/org/apache/camel/kafkaconnector/camel-aws2-kinesis-firehose-kafka-connector/0.5.0/camel-aws2-kinesis-firehose-kafka-connector-0.5.0-package.zip
> unzip camel-aws2-kinesis-firehose-kafka-connector-0.5.0-package.zip
```

On AWS console create a Kinesis firehose delivery stream named firehose-stream and choose to send it to an S3 bucket from the available list (in the same region)
Choose 1 Mb as buffer size and 60 seconds as buffer interval.

Now it's time to setup the connectors

Open the AWS2 Kinesis Firehose configuration file

```
name=CamelAWS2KinesisFirehoseSinkConnector
connector.class=org.apache.camel.kafkaconnector.aws2kinesisfirehose.CamelAws2kinesisfirehoseSinkConnector
key.converter=org.apache.kafka.connect.storage.StringConverter
value.converter=org.apache.kafka.connect.storage.StringConverter

topics=mytopic

camel.sink.path.streamName=firehose-stream

camel.component.aws2-kinesis-firehose.access-key=xxxx
camel.component.aws2-kinesis-firehose.secret-key=yyyy
camel.component.aws2-kinesis-firehose.region=eu-west-1
```

and add the correct credentials for AWS.

Now you can run the example

```
$KAFKA_HOME/bin/connect-standalone.sh $KAFKA_HOME/config/connect-standalone.properties config/CamelAWS2KinesisFirehoseSinkConnector.properties
```

Just connect to your AWS Console and check the S3 bucket

On a different terminal run the kafka-producer and send messages to your Kafka Broker.

```
bin/kafka-console-producer.sh --bootstrap-server localhost:9092 --topic mytopic
Kafka to Kinesis Firehose message 1
Kafka to Kinesis Firehose message 2
```

You shold see an S3 object created each 60 seconds and in it, you should see the messages concatenated.

## Openshift

### What is needed

- An AWS Kinesis Firehose delivery stream
- An AWS S3 bucket
- An Openshift instance

### Running Kafka using Strimzi Operator

First we install the Strimzi operator and use it to deploy the Kafka broker and Kafka Connect into our OpenShift project.
We need to create security objects as part of installation so it is necessary to switch to admin user.
If you use Minishift, you can do it with the following command:

[source,bash,options="nowrap"]
----
oc login -u system:admin
----

We will use OpenShift project `myproject`.
If it doesn't exist yet, you can create it using following command:

[source,bash,options="nowrap"]
----
oc new-project myproject
----

If the project already exists, you can switch to it with:

[source,bash,options="nowrap"]
----
oc project myproject
----

We can now install the Strimzi operator into this project:

[source,bash,options="nowrap",subs="attributes"]
----
oc apply -f https://github.com/strimzi/strimzi-kafka-operator/releases/download/0.19.0/strimzi-cluster-operator-0.19.0.yaml
----

Next we will deploy a Kafka broker cluster and a Kafka Connect cluster and then create a Kafka Connect image with the Debezium connectors installed:

[source,bash,options="nowrap",subs="attributes"]
----
# Deploy a single node Kafka broker
oc apply -f https://github.com/strimzi/strimzi-kafka-operator/raw/0.19.0/examples/kafka/kafka-persistent-single.yaml

# Deploy a single instance of Kafka Connect with no plug-in installed
oc apply -f https://github.com/strimzi/strimzi-kafka-operator/raw/0.19.0/examples/connect/kafka-connect-s2i-single-node-kafka.yaml
----

Optionally enable the possibility to instantiate Kafka Connectors through specific custom resource:
[source,bash,options="nowrap"]
----
oc annotate kafkaconnects2is my-connect-cluster strimzi.io/use-connector-resources=true
----

### Add Camel Kafka connector binaries

Strimzi uses `Source2Image` builds to allow users to add their own connectors to the existing Strimzi Docker images.
We now need to build the connectors and add them to the image,
if you have built the whole project (`mvn clean package`) decompress the connectors you need in a folder (i.e. like `my-connectors/`)
so that each one is in its own subfolder
(alternatively you can download the latest officially released and packaged connectors from maven):

So we need to do something like this:

```
> cd my-connectors/
> wget https://repo1.maven.org/maven2/org/apache/camel/kafkaconnector/camel-aws2-kinesis-firehose-kafka-connector/0.5.0/camel-aws2-kinesis-firehose-kafka-connector-0.5.0-package.zip
> unzip camel-aws2-kinesis-firehose-kafka-connector-0.5.0-package.zip
```

Now we can start the build 

[source,bash,options="nowrap"]
----
oc start-build my-connect-cluster-connect --from-dir=./my-connectors/ --follow
----

We should now wait for the rollout of the new image to finish and the replica set with the new connector to become ready.
Once it is done, we can check that the connectors are available in our Kafka Connect cluster.
Strimzi is running Kafka Connect in a distributed mode.

To check the available connector plugins, you can run the following command:

[source,bash,options="nowrap"]
----
oc exec -i `oc get pods --field-selector status.phase=Running -l strimzi.io/name=my-connect-cluster-connect -o=jsonpath='{.items[0].metadata.name}'` -- curl -s http://my-connect-cluster-connect-api:8083/connector-plugins
----

You should see something like this:

[source,json,options="nowrap"]
----
[{"class":"org.apache.camel.kafkaconnector.CamelSinkConnector","type":"sink","version":"0.5.0"},{"class":"org.apache.camel.kafkaconnector.CamelSourceConnector","type":"source","version":"0.5.0"},{"class":"org.apache.camel.kafkaconnector.aws2kinesisfirehose.CamelAws2kinesisfirehoseSinkConnector","type":"sink","version":"0.5.0"},{"class":"org.apache.kafka.connect.file.FileStreamSinkConnector","type":"sink","version":"2.5.0"},{"class":"org.apache.kafka.connect.file.FileStreamSourceConnector","type":"source","version":"2.5.0"},{"class":"org.apache.kafka.connect.mirror.MirrorCheckpointConnector","type":"source","version":"1"},{"class":"org.apache.kafka.connect.mirror.MirrorHeartbeatConnector","type":"source","version":"1"},{"class":"org.apache.kafka.connect.mirror.MirrorSourceConnector","type":"source","version":"1"}]
----

### Set the AWS credential as secret (optional)

You can also set the aws creds option as secret, you'll need to edit the file config/aws2-kinesis-firehose-cred.properties with the correct credentials and then execute the following command

[source,bash,options="nowrap"]
----
oc create secret generic aws2-kinesis-firehose --from-file=config/openshift/aws2-kinesis-firehose-cred.properties
----

Now we need to edit KafkaConnectS2I custom resource to reference the secret. For example:

[source,bash,options="nowrap"]
----
spec:
  # ...
  config:
    config.providers: file
    config.providers.file.class: org.apache.kafka.common.config.provider.FileConfigProvider
  #...
  externalConfiguration:
    volumes:
      - name: aws-credentials
        secret:
          secretName: aws2-kinesis-firehose
----

In this way the secret aws2-kibesis-firehose will be mounted as volume with path /opt/kafka/external-configuration/aws-credentials/

### Create connector instance

Now we can create some instance of the AWS2 Kinesis Firehose sink connector:

[source,bash,options="nowrap"]
----
oc exec -i `oc get pods --field-selector status.phase=Running -l strimzi.io/name=my-connect-cluster-connect -o=jsonpath='{.items[0].metadata.name}'` -- curl -X POST \
    -H "Accept:application/json" \
    -H "Content-Type:application/json" \
    http://my-connect-cluster-connect-api:8083/connectors -d @- <<'EOF'
{
  "name": "kinesis-firehose-sink-connector",
  "config": {
    "connector.class": "org.apache.camel.kafkaconnector.aws2kinesisfirehose.CamelAws2kinesisfirehoseSinkConnector",
    "tasks.max": "1",
    "key.converter": "org.apache.kafka.connect.storage.StringConverter",
    "value.converter": "org.apache.kafka.connect.storage.StringConverter",
    "topics": "kinesis-firehose-topic",
    "camel.sink.path.streamName": "firehose-stream",
    "camel.component.aws2-kinesis-firehose.accessKey": "xxx",
    "camel.component.aws2-kinesis-firehose.secretKey": "xxx",
    "camel.component.aws2-kinesis-firehose.region": "xxx"
  }
}
EOF
----

Altenatively, if have enabled `use-connector-resources`, you can create the connector instance by creating a specific custom resource:

[source,bash,options="nowrap"]
----
oc apply -f - << EOF
apiVersion: kafka.strimzi.io/v1alpha1
kind: KafkaConnector
metadata:
  name: kinesis-firehose-sink-connector
  namespace: myproject
  labels:
    strimzi.io/cluster: my-connect-cluster
spec:
  class: org.apache.camel.kafkaconnector.aws2kinesisfirehose.CamelAws2kinesisfirehoseSinkConnector
  tasksMax: 1
  config:
    key.converter: org.apache.kafka.connect.storage.StringConverter
    value.converter: org.apache.kafka.connect.storage.StringConverter
    topics: kinesis-firehose-topic
    camel.sink.path.streamName: firehose-stream
    camel.component.aws2-kinesis-firehose.accessKey: xxxx
    camel.component.aws2-kinesis-firehose.secretKey: yyyy
    camel.component.aws2-kinesis-firehose.region: region
EOF
----

If you followed the optional step for secret credentials you can run the following command:

[source,bash,options="nowrap"]
----
oc apply -f config/openshift/aws2-kinesis-firehose-sink.yaml
----

You can check the status of the connector using

[source,bash,options="nowrap"]
----
oc exec -i `oc get pods --field-selector status.phase=Running -l strimzi.io/name=my-connect-cluster-connect -o=jsonpath='{.items[0].metadata.name}'` -- curl -s http://my-connect-cluster-connect-api:8083/connectors/kinesis-firehose-sink-connector/status
----

Just connect to your AWS Console and check the content of camel-kafka-connector bucket.

On a different terminal run the kafka-producer and send messages to your Kafka Broker.

```
oc exec -i -c kafka my-cluster-kafka-0 -- bin/kafka-console-producer.sh --bootstrap-server localhost:9092 --topic kinesis-firehose-topic
Kafka to S3 message 1
Kafka to S3 message 2
Kafka to S3 message 3
Kafka to S3 message 4
Kafka to S3 message 5
```

You shold see an S3 object created each 60 seconds and in it, you should see the messages concatenated.