From: Bagas Sanjaya <bagasdotme@gmail.com>
To: "Lénaïc Huard" <lenaic@lhuard.fr>, git@vger.kernel.org
Cc: Junio C Hamano <gitster@pobox.com>,
Derrick Stolee <dstolee@microsoft.com>,
Eric Sunshine <sunshine@sunshineco.com>
Subject: Re: [PATCH] maintenance: use systemd timers on Linux
Date: Sun, 2 May 2021 12:28:31 +0700 [thread overview]
Message-ID: <81e77586-8e9a-44b8-bee6-94ecf1b60d12@gmail.com> (raw)
In-Reply-To: <20210501145220.2082670-1-lenaic@lhuard.fr>
On 01/05/21 21.52, Lénaïc Huard wrote:
> The existing mechanism for scheduling background maintenance is done
> through cron. On Linux systems managed by systemd, systemd provides an
> alternative to schedule recurring tasks: systemd timers.
>
> The main motivations to implement systemd timers in addition to cron
> are:
> * cron is optional and Linux systems running systemd might not have it
> installed.
Supposed that I have Linux box with systemd and classical cron. Should
systemd timers be preferred over cron?
> * The execution of `crontab -l` can tell us if cron is installed but not
> if the daemon is actually running.
> * With systemd, each service is run in its own cgroup and its logs are
> tagged by the service inside journald. With cron, all scheduled tasks
> are running in the cron daemon cgroup and all the logs of the
> user-scheduled tasks are pretended to belong to the system cron
> service.
> Concretely, a user that doesn’t have access to the system logs won’t
> have access to the log of its own tasks scheduled by cron whereas he
> will have access to the log of its own tasks scheduled by systemd
> timer.
>
> In order to schedule git maintenance, we need two unit template files:
> * ~/.config/systemd/user/git-maintenance@.service
> to define the command to be started by systemd and
> * ~/.config/systemd/user/git-maintenance@.timer
> to define the schedule at which the command should be run.
>
> Those units are templates that are parametrized by the frequency.
>
> Based on those templates, 3 timers are started:
> * git-maintenance@hourly.timer
> * git-maintenance@daily.timer
> * git-maintenance@weekly.timer
>
> The command launched by those three timers are the same than with the
> other scheduling methods:
>
> git for-each-repo --config=maintenance.repo maintenance run
> --schedule=%i
>
> with the full path for git to ensure that the version of git launched
> for the scheduled maintenance is the same as the one used to run
> `maintenance start`.
>
> The timer unit contains `Persistent=true` so that, if the computer is
> powered down when a maintenance task should run, the task will be run
> when the computer is back powered on.
>
> Signed-off-by: Lénaïc Huard <lenaic@lhuard.fr>
Nevertheless, because we are dealing with external dependency (systemd), it
should makes sense to enforce this dependency requirement when user choose to use
systemd timers so that users on non-systemd boxes (such as Gentoo with OpenRC)
don't see errors that forcing them to use systemd.
--
An old man doll... just what I always wanted! - Clara
next prev parent reply other threads:[~2021-05-02 5:28 UTC|newest]
Thread overview: 138+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-01 14:52 [PATCH] maintenance: use systemd timers on Linux Lénaïc Huard
2021-05-01 20:02 ` brian m. carlson
2021-05-02 5:28 ` Bagas Sanjaya [this message]
2021-05-02 6:49 ` Eric Sunshine
2021-05-02 6:45 ` Eric Sunshine
2021-05-02 14:10 ` Phillip Wood
2021-05-05 12:19 ` Đoàn Trần Công Danh
2021-05-05 14:57 ` Phillip Wood
2021-05-05 12:01 ` Ævar Arnfjörð Bjarmason
2021-05-09 22:34 ` Lénaïc Huard
2021-05-10 13:03 ` Ævar Arnfjörð Bjarmason
2021-05-02 11:12 ` Bagas Sanjaya
2021-05-03 12:04 ` Derrick Stolee
2021-05-09 21:32 ` [PATCH v2 0/1] " Lénaïc Huard
2021-05-09 21:32 ` [PATCH v2 1/1] " Lénaïc Huard
2021-05-10 1:20 ` Đoàn Trần Công Danh
2021-05-10 2:48 ` Eric Sunshine
2021-05-10 6:25 ` Junio C Hamano
2021-05-12 0:29 ` Đoàn Trần Công Danh
2021-05-12 6:59 ` Felipe Contreras
2021-05-12 13:26 ` Phillip Wood
2021-05-12 13:38 ` Phillip Wood
2021-05-12 15:41 ` Đoàn Trần Công Danh
2021-05-10 18:03 ` Phillip Wood
2021-05-10 18:25 ` Eric Sunshine
2021-05-10 20:09 ` Phillip Wood
2021-05-10 20:52 ` Eric Sunshine
2021-06-08 14:55 ` Lénaïc Huard
2021-05-10 19:15 ` Martin Ågren
2021-05-11 14:50 ` Phillip Wood
2021-05-11 17:31 ` Derrick Stolee
2021-05-20 22:13 ` [PATCH v3 0/4] " Lénaïc Huard
2021-05-20 22:13 ` [PATCH v3 1/4] cache.h: rename "xdg_config_home" to "xdg_config_home_git" Lénaïc Huard
2021-05-20 23:44 ` Đoàn Trần Công Danh
2021-05-20 22:13 ` [PATCH v3 2/4] maintenance: introduce ENABLE/DISABLE for code clarity Lénaïc Huard
2021-05-20 22:13 ` [PATCH v3 3/4] maintenance: `git maintenance run` learned `--scheduler=<scheduler>` Lénaïc Huard
2021-05-21 9:52 ` Bagas Sanjaya
2021-05-20 22:13 ` [PATCH v3 4/4] maintenance: optionally use systemd timers on Linux Lénaïc Huard
2021-05-21 9:59 ` Bagas Sanjaya
2021-05-21 16:59 ` Derrick Stolee
2021-05-22 6:57 ` Johannes Schindelin
2021-05-23 18:36 ` Felipe Contreras
2021-05-23 23:27 ` brian m. carlson
2021-05-24 1:18 ` Felipe Contreras
2021-05-24 7:03 ` Ævar Arnfjörð Bjarmason
2021-05-24 15:51 ` Junio C Hamano
2021-05-25 1:50 ` Johannes Schindelin
2021-05-25 11:13 ` Felipe Contreras
2021-05-26 10:29 ` CoC, inclusivity etc. (was "Re: [...] systemd timers on Linux") Ævar Arnfjörð Bjarmason
2021-05-26 16:05 ` Felipe Contreras
2021-05-27 14:24 ` Jeff King
2021-05-27 17:30 ` Felipe Contreras
2021-05-27 23:58 ` Junio C Hamano
2021-05-28 14:44 ` Phillip Susi
2021-05-30 21:58 ` Jeff King
2021-05-24 17:52 ` [PATCH v3 4/4] maintenance: optionally use systemd timers on Linux Felipe Contreras
2021-05-24 7:15 ` [PATCH v4 0/4] add support for " Lénaïc Huard
2021-05-24 7:15 ` [PATCH v4 1/4] cache.h: Introduce a generic "xdg_config_home_for(…)" function Lénaïc Huard
2021-05-24 9:33 ` Phillip Wood
2021-05-24 12:23 ` Đoàn Trần Công Danh
2021-05-24 7:15 ` [PATCH v4 2/4] maintenance: introduce ENABLE/DISABLE for code clarity Lénaïc Huard
2021-05-24 9:41 ` Phillip Wood
2021-05-24 12:36 ` Đoàn Trần Công Danh
2021-05-25 7:18 ` Lénaïc Huard
2021-05-25 8:02 ` Junio C Hamano
2021-05-24 9:47 ` Ævar Arnfjörð Bjarmason
2021-05-24 7:15 ` [PATCH v4 3/4] maintenance: `git maintenance run` learned `--scheduler=<scheduler>` Lénaïc Huard
2021-05-24 10:12 ` Phillip Wood
2021-05-30 6:39 ` Lénaïc Huard
2021-05-30 10:16 ` Phillip Wood
2021-05-24 7:15 ` [PATCH v4 4/4] maintenance: add support for systemd timers on Linux Lénaïc Huard
2021-05-24 9:55 ` Ævar Arnfjörð Bjarmason
2021-05-24 16:39 ` Eric Sunshine
2021-05-24 18:08 ` Felipe Contreras
2021-05-26 10:26 ` Phillip Wood
2021-05-24 9:04 ` [PATCH v4 0/4] " Junio C Hamano
2021-06-08 13:39 ` [PATCH v5 0/3] " Lénaïc Huard
2021-06-08 13:39 ` [PATCH v5 1/3] cache.h: Introduce a generic "xdg_config_home_for(…)" function Lénaïc Huard
2021-06-08 13:39 ` [PATCH v5 2/3] maintenance: `git maintenance run` learned `--scheduler=<scheduler>` Lénaïc Huard
2021-06-08 13:40 ` [PATCH v5 3/3] maintenance: add support for systemd timers on Linux Lénaïc Huard
2021-06-09 9:34 ` Jeff King
2021-06-09 15:01 ` Phillip Wood
2021-06-09 0:21 ` [PATCH v5 0/3] " Junio C Hamano
2021-06-09 14:54 ` Phillip Wood
2021-06-12 16:50 ` [PATCH v6 0/3] maintenance: " Lénaïc Huard
2021-06-12 16:50 ` [PATCH v6 1/3] cache.h: Introduce a generic "xdg_config_home_for(…)" function Lénaïc Huard
2021-06-12 16:50 ` [PATCH v6 2/3] maintenance: `git maintenance run` learned `--scheduler=<scheduler>` Lénaïc Huard
2021-06-14 4:36 ` Eric Sunshine
2021-06-16 18:12 ` Derrick Stolee
2021-06-17 4:11 ` Eric Sunshine
2021-06-17 14:26 ` Phillip Wood
2021-07-02 15:04 ` Lénaïc Huard
2021-06-12 16:50 ` [PATCH v6 3/3] maintenance: add support for systemd timers on Linux Lénaïc Huard
2021-07-02 14:25 ` [PATCH v7 0/3] " Lénaïc Huard
2021-07-02 14:25 ` [PATCH v7 1/3] cache.h: Introduce a generic "xdg_config_home_for(…)" function Lénaïc Huard
2021-07-02 14:25 ` [PATCH v7 2/3] maintenance: `git maintenance run` learned `--scheduler=<scheduler>` Lénaïc Huard
2021-07-06 19:56 ` Ævar Arnfjörð Bjarmason
2021-07-06 20:52 ` Junio C Hamano
2021-07-13 0:15 ` Jeff King
2021-07-13 2:22 ` Eric Sunshine
2021-07-13 3:56 ` Jeff King
2021-07-13 5:17 ` Eric Sunshine
2021-07-13 7:04 ` Bagas Sanjaya
2021-07-06 21:18 ` Felipe Contreras
2021-08-23 20:06 ` Lénaïc Huard
2021-08-23 22:30 ` Junio C Hamano
2021-07-02 14:25 ` [PATCH v7 3/3] maintenance: add support for systemd timers on Linux Lénaïc Huard
2021-07-06 20:03 ` Ævar Arnfjörð Bjarmason
2021-07-02 18:18 ` [PATCH v7 0/3] " Junio C Hamano
2021-07-06 13:18 ` Phillip Wood
2021-08-23 20:40 ` [PATCH v8 " Lénaïc Huard
2021-08-23 20:40 ` [PATCH v8 1/3] cache.h: Introduce a generic "xdg_config_home_for(…)" function Lénaïc Huard
2021-08-23 20:40 ` [PATCH v8 2/3] maintenance: `git maintenance run` learned `--scheduler=<scheduler>` Lénaïc Huard
2021-08-24 17:45 ` Derrick Stolee
2021-08-23 20:40 ` [PATCH v8 3/3] maintenance: add support for systemd timers on Linux Lénaïc Huard
2021-08-24 17:45 ` Derrick Stolee
2021-08-24 17:47 ` [PATCH v8 0/3] " Derrick Stolee
2021-08-27 21:02 ` [PATCH v9 " Lénaïc Huard
2021-08-27 21:02 ` [PATCH v9 1/3] cache.h: Introduce a generic "xdg_config_home_for(…)" function Lénaïc Huard
2021-08-27 21:02 ` [PATCH v9 2/3] maintenance: `git maintenance run` learned `--scheduler=<scheduler>` Lénaïc Huard
2021-08-27 23:54 ` Ramsay Jones
2021-08-27 21:02 ` [PATCH v9 3/3] maintenance: add support for systemd timers on Linux Lénaïc Huard
2021-09-04 20:54 ` [PATCH v10 0/3] " Lénaïc Huard
2021-09-04 20:54 ` [PATCH v10 1/3] cache.h: Introduce a generic "xdg_config_home_for(…)" function Lénaïc Huard
2021-09-04 20:54 ` [PATCH v10 2/3] maintenance: `git maintenance run` learned `--scheduler=<scheduler>` Lénaïc Huard
2021-09-04 20:55 ` [PATCH v10 3/3] maintenance: add support for systemd timers on Linux Lénaïc Huard
2021-09-07 16:48 ` [PATCH v10 0/3] " Derrick Stolee
2021-09-08 11:44 ` Derrick Stolee
2021-09-09 5:52 ` Lénaïc Huard
2021-09-09 19:55 ` Derrick Stolee
2021-09-27 12:50 ` Ævar Arnfjörð Bjarmason
2021-09-27 21:44 ` Lénaïc Huard
2021-08-17 17:22 ` [PATCH v5 0/3] " Derrick Stolee
2021-08-17 19:43 ` Phillip Wood
2021-08-17 20:29 ` Derrick Stolee
2021-08-18 5:56 ` Lénaïc Huard
2021-08-18 13:28 ` Derrick Stolee
2021-08-18 18:23 ` Junio C Hamano
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