Kafka REST ConfigMap

You can customize the kafkarest config files by editing the kafkarest-cm ConfigMap. Adding a file to the data section of kafkarest-cm copies the file contents to /opt/mapr/kafka-rest/kafka-rest-5.1.2/config/ and overrides the existing files after pod restart.

The following example customizes the /opt/mapr/kafka-rest/kafka-rest-5.1.2/config/kafka-rest.properties file:

  1. Add the customized kafka-rest.properties content in the data section by editing the existing kafkarest-cm: $ kubectl -n dataplatform edit cm kafkarest-cm: 
    ...
ApiVersion: v1 
data:
  kafka-rest.properties: | 
    listeners=https://0.0.0.0:8082 
    authentication.enable=true 
    impersonation.enable=true 
    schema.registry.enable=false 
    streams.default.stream=/st
    headers.file=/opt/mapr/kafka-rest/kafka-rest-5.1.2/config/headers.xml 
    host.name=kafkarest-svc.dataplatform.svc.cluster.local
kind: ConfigMap metadata:
...
  2. Restart the kafkarest pods:
    $ kubectl delete pods -n dataplatform kafkarest-0
  3. Check the kafkarest config file:
    $ kubectl -n dataplatform exec --stdin --tty kafkarest-0 -- /bin/bash
$ cat /opt/mapr/kafka-rest/kafka-rest-5.1.2/config/kafka-rest.properties 
listeners=https://0.0.0.0:8082
authentication.enable=true 
impersonation.enable=true 
schema.registry.enable=false 
streams.default.stream=/st
headers.file=/opt/mapr/kafka-rest/kafka-rest-5.1.2/config/headers.xml 
host.name=kafkarest-svc.dataplatform.svc.cluster.local