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43 lines
1.8 KiB
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43 lines
1.8 KiB
Plaintext
---
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layout: docs
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page_title: KV - Secrets Engines
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description: The KV secrets engine can store arbitrary secrets.
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---
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# KV Secrets Engine
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The `kv` secrets engine is a generic Key-Value store used to store arbitrary
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secrets within the configured physical storage for Vault. This backend can be
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run in one of two modes; either it can be configured to store a single value
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for a key or, versioning can be enabled and a configurable number of versions
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for each key will be stored.
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## KV Version 1
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When running the `kv` secrets backend non-versioned, only the most recently
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written value for a key will be preserved. The benefits of non-versioned `kv`
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is a reduced storage size for each key since no additional metadata or history
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is stored. Additionally, requests going to a backend configured this way will be
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more performant because for any given request there will be fewer storage calls
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and no locking.
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More information about running in this mode can be found in the [K/V Version 1
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Docs](/docs/secrets/kv/kv-v1)
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## KV Version 2
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When running v2 of the `kv` backend a key can retain a configurable number of
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versions. This defaults to 10 versions. The older versions' metadata and data
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can be retrieved. Additionally, Check-and-Set operations can be used to avoid
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overwriting data unintentionally.
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When a version is deleted the underlying data is not removed, rather it is
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marked as deleted. Deleted versions can be undeleted. To permanently remove a
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version's data the destroy command or API endpoint can be used. Additionally all
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versions and metadata for a key can be deleted by deleting on the metadata
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command or API endpoint. Each of these operations can be ACL'ed differently,
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restricting who has permissions to soft delete, undelete, or fully remove data.
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More information about running in this mode can be found in the [K/V Version 2
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Docs](/docs/secrets/kv/kv-v2)
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