The file slack.yml contains Alertmanager configuration that sends Slack notifications for RabbitMQ and RabbitMQ Cluster Operator alerts. It groups alerts by namespace and RabbitMQ cluster.
Replace
((ALERTMANAGER_NAME))with the name of the Alertmanager CRD object((SLACK_CHANNEL))with the Slack channel name (e.g.#my-channel)((SLACK_API_URL))with the Slack Webhook URL (see here how to create one, e.g.https://hooks.slack.com/services/paste/your/token)
If the Secret already exists, either edit the existing secret or, if you want to define multiple Alertmanager configurations, use the custom resource AlertmanagerConfig. Deploy the Secret into the same namespace where Alertmanager is running.