The type for log threshold. A log level of None disables logging.

set_level ~default l set the log levels needed to have all of the log sources appearing in l be used.

logs is a command-liner term for setting the log_threshold.

s_net is used for network options.

s_disk is used for disk options.

s_log is used for logging and monitoring options.

s_he is used for happy eyeballs options.

s_dns is used for DNS options.

s_ssh is used for SSH options.

s_tls is used for TLS options.

s_http is used for HTTP options.

The initial delay, specified in seconds, before a unikernel starting up. Defaults to 0. Useful for tenders and environments that take some time to bring devices up.

The name key.

The current name of the unikernel. This is expected to be the same during the lifetime of an unikernel (but there's no guarantee since it can be modified).

at_exit hook registers hook, which will be executed before the unikernel exits. The first hook registered will be executed last.

at_enter_iter hook registers hook to be executed at the beginning of each event loop iteration. The first hook registered will be executed last.

If hook calls at_enter_iter recursively, the new hook will run only on the next event loop iteration.

at_leave_iter hook registers hook to be executed at the end of each event loop iteration. See at_enter_iter for details.

run_exit_hooks () calls the sequence of hooks registered with at_exit in sequence.

run_enter_iter_hooks () calls the sequence of hooks registered with at_enter_iter in sequence.

run_leave_iter_hooks () call the sequence of hooks registered with at_leave_iter in sequence.

argument_error is the exit code used for argument parsing errors: 64.

help_version is the exit code used when help/version is used: 63.

register_arg term registers term to be evaluated at boot time. An example is: let hello = register_arg <myterm> (at the toplevel of the unikernel), and in the unikernel code Logs.info (fun m -> m "hello argument is: %s" (hello ())).