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63 lines
2.0 KiB
ReStructuredText
63 lines
2.0 KiB
ReStructuredText
.. _usage:
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*****
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Usage
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*****
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============
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CLI Overview
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============
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.. NOTE::
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To avoid duplication, the zrepl binary is self-documenting:
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invoke any subcommand at any level with the ``--help`` flag to get information on the subcommand, available flags, etc.
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.. list-table::
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:widths: 30 70
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:header-rows: 1
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* - Subcommand
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- Description
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* - ``zrepl daemon``
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- run the daemon, required for all zrepl functionality
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* - ``zrepl control``
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- control / query the daemon
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* - ``zrepl control status``
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- show job activity / monitoring (``--format raw``)
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* - ``zrepl test``
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- test configuration, try pattern syntax, dry run pruning policy, etc.
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* - ``zrepl stdinserver``
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- see :ref:`transport-ssh+stdinserver`
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.. _usage-zrepl-daemon:
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============
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zrepl daemon
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============
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All actual work zrepl does is performed by a daemon process.
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The daemon supports structured :ref:`logging <logging>` and provides :ref:`monitoring endpoints <monitoring>`.
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When installating from a package, the package maintainer should have provided an init script / systemd.service file.
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You should thus be able to start zrepl daemon using your init system.
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Alternatively, or for running zrepl in the foreground, simply execute ``zrepl daemon``.
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Note that you won't see much output with the :ref:`default logging configuration<logging-default-config>`:
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.. ATTENTION::
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Make sure to actually monitor the error level output of zrepl: some configuration errors will not make the daemon exit.
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Example: if the daemon cannot create the :ref:`transport-ssh+stdinserver` sockets in the runtime directory,
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it will emit an error message but not exit because other tasks such as periodic snapshots & pruning are of equal importance.
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.. _usage-zrepl-daemon-restarting:
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Restarting
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~~~~~~~~~~
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The daemon handles SIGINT and SIGTERM for graceful shutdown.
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Graceful shutdown means at worst that a job will not be rescheduled for the next interval.
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The daemon exits as soon as all jobs have reported shut down.
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