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authorLennart Poettering <lennart@poettering.net>2015-07-11 14:16:40 -0300
committerLennart Poettering <lennart@poettering.net>2015-07-11 14:24:29 -0300
commit2ed3de9cc4f80670cd911536c3e40239fb0e2aa6 (patch)
tree13e52c42ed399df184cf22613c1a4ff1bc60a3de /DISTRO_PORTING
parent43694a8cc70667498f3ffc5d9325b7d0428558e5 (diff)
build-sys: warn if people don't change the default NTP servers when building systemd
Also, explain the situation in the docs. Relates to #437
Diffstat (limited to 'DISTRO_PORTING')
-rw-r--r--DISTRO_PORTING19
1 files changed, 19 insertions, 0 deletions
diff --git a/DISTRO_PORTING b/DISTRO_PORTING
index d8e9ded943..07aea865be 100644
--- a/DISTRO_PORTING
+++ b/DISTRO_PORTING
@@ -14,6 +14,7 @@ HOWTO:
--with-kbd-loadkeys=
--with-kbd-setfont=
--with-tty-gid=
+ --with-ntp-servers=
2) Try it out. Play around (as an ordinary user) with
'/usr/lib/systemd/systemd --test --system' for a test run
@@ -21,6 +22,24 @@ HOWTO:
print the initial transaction it would execute during boot-up.
This will also inform you about ordering loops and suchlike
+NTP POOL:
+
+ By default, timesyncd uses the Google NTP servers
+ time[1-4].google.com. They serve time that is not standards
+ compliant, and can be up to .5s off. Google does not
+ officially support these servers for the broader
+ audience. Distributions and vendors really should not ship
+ OSes or devices with these NTP servers configured. Instead,
+ please register your own vendor pool at ntp.org and make it
+ the built-in default by passing --with-ntp-servers= to
+ configure. Registering vendor pools is free:
+
+ http://www.pool.ntp.org/en/vendors.html
+
+ Again, if you ship your software or device with the default
+ NTP servers, then you will get served wrong time, and will
+ rely on services that might not be supported for long.
+
CONTRIBUTING UPSTREAM:
We generally do no longer accept distribution-specific