Audit: Support audit log file rotation #600
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Document new behavior of the Vault file audit device and new log rotation options (see Vault PR 31213). Signed-off-by: t0x01 <[email protected]>
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Description
Allow to natively configure Vault file audit device log file rotation with the
audit enablecommand by adding 3 new options to the file backend. These 3 new options and their default values are as follows:max_files:(int: 0)- The maximum number of older audit log file archives to keep. Defaults to0(no files are ever deleted). Set to-1to discard old audit log files when a new one is created.max_bytes:(int: 0)- The number of bytes that should be written to an audit log file before it needs to be rotated. Unless specified, there is no limit to the number of bytes that can be written to a log file.max_duration:(string: "24h")- The maximum duration an audit log file should be written to before it needs to be rotated. Must be a duration value such as"30s". Defaults to"24h". If no time unit is specified, the time duration number is assumed to be in seconds. Set to0to disable time-based log file rotation.By default, audit log file rotation is set to occur every 24 hours, with no older log file ever removed. In order to revert to previous behavior, where log rotation was not handled by the Vault, the
max_durationoption must be set to0, as all other new options are already set to0by default.See Vault PR 31213.