Encrypted Write Ahead Provenance Repository Properties

All of the properties defined above still apply. Only encryption-specific properties are listed here.


Property	Description
`nifi.provenance.repository.debug.frequency`	Controls the number of events processed between DEBUG statements documenting the performance metrics of the repository. This value is only used when DEBUG level statements are enabled in the log configuration.
`nifi.provenance.repository.encryption.key.provider.implementation`	This is the fully-qualified class name of the key provider. A key provider is the datastore interface for accessing the encryption key to protect the provenance events. There are currently two implementations - `StaticKeyProvider` which reads a key directly from nifi.properties, and `FileBasedKeyProvider` which reads n many keys from an encrypted file. The interface is extensible, and HSM-backed or other providers are expected in the future.
`nifi.provenance.repository.encryption.key.provider.location`	The path to the key definition resource (empty for `StaticKeyProvider`, `./keys.nkp` or similar path for `FileBasedKeyProvider`). For future providers like an HSM, this may be a connection string or URL.
`nifi.provenance.repository.encryption.key.id`	The active key ID to use for encryption (e.g. `Key1`).
`nifi.provenance.repository.encryption.key`	The key to use for `StaticKeyProvider`. The key format is hex-encoded (`0123456789ABCDEFFEDCBA98765432100123456789ABCDEFFEDCBA9876543210`) but can also be encrypted using the `./encrypt-config.sh` tool in NiFi Toolkit.
`nifi.provenance.repository.encryption.key.id.`*	Allows for additional keys to be specified for the `StaticKeyProvider`. For example, the line `nifi.provenance.repository.encryption.key.id.Key2=012…210` would provide an available key `Key2`.

The simplest configuration is below:

nifi.provenance.repository.implementation=org.apache.nifi.provenance.EncryptedWriteAheadProvenanceRepository
nifi.provenance.repository.debug.frequency=100
nifi.provenance.repository.encryption.key.provider.implementation=org.apache.nifi.security.kms.StaticKeyProvider
nifi.provenance.repository.encryption.key.provider.location=
nifi.provenance.repository.encryption.key.id=Key1
nifi.provenance.repository.encryption.key=0123456789ABCDEFFEDCBA98765432100123456789ABCDEFFEDCBA9876543210