Create an Elasticsearch Sink
To create an external ElasticSearch sink for Astra Streaming topics:
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Click the Sinks tab…
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… and click Create Sink.
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First enter the namespace, sink type, and sink name…
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… then enter the URL, index name, username, and password for the sink.

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Click Create.
Your sink name and index name must start with a lowercase alphabetic character. It can only contain lowercase alphabetic characters, numbers, and hyphens (kebab-case).