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19 lines
982 B
Markdown
19 lines
982 B
Markdown
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# KeyService
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The KeyService is one of Constellation's Kubernetes components, responsible for distributing keys and secrets to other services.
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This includes the JoinService, which contacts the KeyService to derive state disk keys and measurement secrets for newly-joining, and rejoining nodes,
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and Constellation's CSI drivers, which contact the KeyService for disk encryption keys.
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The service is not exposed outside the cluster, and should be kept for internal usage only.
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## gRPC API
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Keys can be requested through simple gRPC API based on an ID and key length.
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## Backends
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The KeyService supports multiple backends to store keys and manage crypto operations.
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The default option holds a master secret in memory. Keys are derived on demand from this secret, and not stored anywhere.
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Other backends make use of external Key Management Systems (KMS) for key derivation and securing a master secret.
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When using an external KMS backend, encrypted keys are stored in cloud buckets.
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