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.

Avant de commencer

Role required: kafka_admin

Procédure

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

   Tableau 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. Remarque : 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.

Résultats

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.