Add documentation for Kafka client

execution/README.md

@@ -95,7 +95,15 @@ kubectl apply -f infrastructure/kafka/service-monitor.yaml
 
 ##### Other options for Kafka
 
-Other Kafka deployments, for example, using Strimzi, should work in similiar way.
+Other Kafka deployments, for example, using Strimzi, should work in a similar way.
+
+#### A Kafka Client Pod
+
+A permanently running pod used for Kafka configuration is started via:
+
+```sh
+kubectl apply -f infrastructure/kafka/kafka-client.yaml 
+```
 
 #### The Kafka Lag Exporter
 

execution/infrastructure/kafka/kafka-client.yaml

+apiVersion: v1
+kind: Pod
+metadata:
+  name: kafka-client-2
+spec:
+  containers:
+  - name: kafka-client
+    image: confluentinc/cp-enterprise-kafka:5.4.0
+    command:
+      - sh
+      - -c
+      - "exec tail -f /dev/null"
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