mirror of
https://github.com/zrepl/zrepl.git
synced 2024-11-22 00:13:52 +01:00
67 lines
2.2 KiB
ReStructuredText
67 lines
2.2 KiB
ReStructuredText
.. _usage:
|
|
|
|
*****
|
|
Usage
|
|
*****
|
|
|
|
============
|
|
CLI Overview
|
|
============
|
|
|
|
.. NOTE::
|
|
|
|
The zrepl binary is self-documenting:
|
|
run ``zrepl help`` for an overview of the available subcommands or ``zrepl SUBCOMMAND --help`` for information on available flags, etc.
|
|
|
|
.. list-table::
|
|
:widths: 30 70
|
|
:header-rows: 1
|
|
|
|
* - Subcommand
|
|
- Description
|
|
* - ``zrepl help``
|
|
- show subcommand overview
|
|
* - ``zrepl daemon``
|
|
- run the daemon, required for all zrepl functionality
|
|
* - ``zrepl status``
|
|
- show job activity, or with ``--raw`` for JSON output
|
|
* - ``zrepl stdinserver``
|
|
- see :ref:`transport-ssh+stdinserver`
|
|
* - ``zrepl signal wakeup JOB``
|
|
- manually trigger replication + pruning of JOB
|
|
* - ``zrepl signal reset JOB``
|
|
- manually abort current replication + pruning of JOB
|
|
* - ``zrepl configcheck``
|
|
- check if config can be parsed without errors
|
|
|
|
.. _usage-zrepl-daemon:
|
|
|
|
============
|
|
zrepl daemon
|
|
============
|
|
|
|
All actual work zrepl does is performed by a daemon process.
|
|
The daemon supports structured :ref:`logging <logging>` and provides :ref:`monitoring endpoints <monitoring>`.
|
|
|
|
When installating from a package, the package maintainer should have provided an init script / systemd.service file.
|
|
You should thus be able to start zrepl daemon using your init system.
|
|
|
|
Alternatively, or for running zrepl in the foreground, simply execute ``zrepl daemon``.
|
|
Note that you won't see much output with the :ref:`default logging configuration<logging-default-config>`:
|
|
|
|
.. ATTENTION::
|
|
|
|
Make sure to actually monitor the error level output of zrepl: some configuration errors will not make the daemon exit.
|
|
|
|
Example: if the daemon cannot create the :ref:`transport-ssh+stdinserver` sockets in the runtime directory,
|
|
it will emit an error message but not exit because other tasks such as periodic snapshots & pruning are of equal importance.
|
|
|
|
.. _usage-zrepl-daemon-restarting:
|
|
|
|
Restarting
|
|
~~~~~~~~~~
|
|
|
|
The daemon handles SIGINT and SIGTERM for graceful shutdown.
|
|
Graceful shutdown means at worst that a job will not be rescheduled for the next interval.
|
|
The daemon exits as soon as all jobs have reported shut down.
|