Create a topic in Hermes

Create a topic from within ServiceNow. Creating a topic from your instance adds a topic record to the Kafka Topics [sys_kafka_topic] table and adds a Kafka topic to Hermes.

시작하기 전에

Role required: kafka_admin

프로시저

1. Navigate to All > Hermes Messaging Service > Topics.
2. Select New.
3. On the form, fill in the fields.

   표 1. Kafka Topic Form

   Field	Description
   Name	Name of the topic. The string that you enter is combined with the application ID and namespace to create the full Kafka topic name. 주: Don't include the snc.<instance_name> prefix with the topic name.
   Application ID	Application associated with the topic. Default is Stream Connect.
   Namespace	Namespace associated with the topic. You can either select a namespace created by the Kafka namespace administrator or select the Default Namespace if separate namespaces aren't configured for your instance. In ServiceNow, all Kafka topics link to a namespace. Namespaces are used to organize topics and, on a domain-separated instance, for domain separation. When a namespace is assigned to a particular domain, all the topics created in that namespace have the same domain.
   Partitions	Number of partitions to create for the topic. Minimum value: 1 Maximum value: 32 Default value: 1
   Active	Option to activate the topic.

4. Select Submit.

결과

The topic appears in both the Kafka Topics [sys_kafka_topic] table and in Hermes. If, for some reason, a topic can't be created in Hermes, it won't be created in the Kafka Topics [sys_kafka_topic] table either.