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Key-value store

On this page
  1. Settings
  2. When is it healthy?
  3. Examples

The Key-value store sensor connects to a Redis server from a private agent and either checks the connection or reads a key and compares its value. Use it to know that the cache or session store answers, and to watch values your applications keep in Redis: a feature flag, a counter, the size of a list.

In the wizard: Database → Key-value store (Redis). Requires an Enterprise plan and an Advanced private agent.

Settings#

Redis connection

Setting Description
Secret The Redis connection string, stored as a Redis secret.
Timeout Time allowed for the connection.
Check type Connect: only open a connection. Key: also read a key.

Key (when Check type is Key)

Setting Description
Key name The key to read. It may use variables.
Key type STRING, SET, SORTED SET, LIST or HASH.
Field For a HASH, the field to read.
Condition, Check value type, Value to check How to compare the value — or, for collections, their content and length.

When is it healthy?#

When the connection opens within the timeout and, in key mode, the condition holds. A numeric value is recorded and charted.

Examples#

  • Redis sessions — Connection: Connect only.
  • Checkout — Retry queue: key checkout:retries, type LIST, length Less than 100.