72 lines
2.8 KiB
Plaintext
72 lines
2.8 KiB
Plaintext
Porting systemd To New Distributions
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HOWTO:
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You need to make the follow changes to adapt systemd to your
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distribution:
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1) Find the right configure parameters for:
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-D rootprefix=
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-D sysvinit-path=
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-D sysvrcnd-path=
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-D rc-local=
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-D halt-local=
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-D loadkeys-path=
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-D setfont-path=
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-D tty-gid=
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-D ntp-servers=
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-D dns-servers=
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-D support-url=
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2) Try it out. Play around (as an ordinary user) with
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'/usr/lib/systemd/systemd --test --system' for a test run
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of systemd without booting. This will read the unit files and
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print the initial transaction it would execute during boot-up.
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This will also inform you about ordering loops and suchlike.
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NTP POOL:
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By default, systemd-timesyncd uses the Google Public NTP servers
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time[1-4].google.com, if no other NTP configuration is available. They
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serve time that uses a leap second smear, and can be up to .5s off from
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servers that use stepped leap seconds.
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https://developers.google.com/time/smear
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If you prefer to use leap second steps, please register your own
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vendor pool at ntp.org and make it the built-in default by
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passing --with-ntp-servers= to configure. Registering vendor
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pools is free:
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http://www.pool.ntp.org/en/vendors.html
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Use -D ntp-servers= to direct systemd-timesyncd to different fallback
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NTP servers.
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DNS SERVERS:
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By default, systemd-resolved uses the Google Public DNS servers
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8.8.8.8, 8.8.4.4, 2001:4860:4860::8888, 2001:4860:4860::8844 as
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fallback, if no other DNS configuration is available.
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Use -D dns-servers= to direct systemd-resolved to different fallback
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DNS servers.
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PAM:
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The default PAM config shipped by systemd is really bare bones.
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It does not include many modules your distro might want to enable
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to provide a more seamless experience. For example, limits set in
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/etc/security/limits.conf will not be read unless you load pam_limits.
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Make sure you add modules your distro expects from user services.
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Pass -D pamconfdir=no to meson to avoid installing this file and
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instead install your own.
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CONTRIBUTING UPSTREAM:
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We generally do no longer accept distribution-specific patches to
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systemd upstream. If you have to make changes to systemd's source code
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to make it work on your distribution, unless your code is generic
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enough to be generally useful, we are unlikely to merge it. Please
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always consider adopting the upstream defaults. If that is not
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possible, please maintain the relevant patches downstream.
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Thank you for understanding.
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