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Cloudflare public DNS service is currently the fastest one according to
https://www.dnsperf.com/#!dns-resolvers. Why not improve the experience for
systemd users using this as a default fallback nameserver?
This new setting allows configuration of CFS period on the CPU cgroup, instead
of using a hardcoded default of 100ms.
Tested:
- Legacy cgroup + Unified cgroup
- systemctl set-property
- systemctl show
- Confirmed that the cgroup settings (such as cpu.cfs_period_ns) were set
appropriately, including updating the CPU quota (cpu.cfs_quota_ns) when
CPUQuotaPeriodSec= is updated.
- Checked that clamping works properly when either period or (quota * period)
are below the resolution of 1ms, or if period is above the max of 1s.
… requirement for portable service images.
systemd will mount the host machine-id and resolv.conf at these
locations, so for read-only images these must exist in the image,
because they can't be created.
Nitpicky, but we've used a lot of random spacings and names in the past,
but we're trying to be completely consistent on "cgroup vN" now.
Generated by `fd -0 | xargs -0 -n1 sed -ri --follow-symlinks 's/cgroups? ?v?([0-9])/cgroup v\1/gI'`.
I manually ignored places where it's not appropriate to replace (eg.
"cgroup2" fstype and in src/shared/linux).
This uses a {% for %} loop in Jekyll to render the page, from the "title"
information in the Front Matter of the actual page files.
This also makes `make-index-md` build rule unnecessary, since generation is
done by the template engine itself.
Tested this by running Jekyll locally.
It turns out Jekyll (the engine behind GitHub Pages) requires that pages
include a "Front Matter" snippet of YAML at the top for proper rendering.
Omitting it will still render the pages, but including it opens up new
possibilities, such as using a {% for %} loop to generate index.md instead of
requiring a separate script.
I'm hoping this will also fix the issue with some of the pages (notably
CODE_OF_CONDUCT.html) not being available under systemd.io
Tested locally by rendering the website with Jekyll. Before this change, the
*.md files were kept unchanged (so not sure how that even works?!), after this
commit, proper *.html files were generated from it.
From WordNet (r) 3.0 (2006) [wn]:
time-out
n 1: a brief suspension of play; "each team has two time-outs left"
From The Free On-line Dictionary of Computing (18 March 2015) [foldoc]:
timeout
A period of time after which an error condition is raised if
some event has not occured. A common example is sending a
message. If the receiver does not acknowledge the message
within some preset timeout period, a transmission error is
assumed to have occured.
This is useful for distributions, where the stability of interface names should
be preseved after an upgrade of systemd. So when some specific release of the
distro is made available, systemd defaults to the latest & greatest naming
scheme, and subsequent updates set the same default. This default may still
be overriden through the kernel and env var options.
A special value "latest" is also allowed. Without a specific name, it is harder
to verride from meson. In case of 'combo' options, meson reads the default
during the initial configuration, and "remembers" this choice. When systemd is
updated, old build/ directories could keep the old default, which would be
annoying. Hence, "latest" is introduced to make it explicit, yet follow the
upstream. This is actually useful for the user too, because it may be used
as an override, without having to actually specify a version.
With this we can stabilize how naming works for network interfaces. A
user can request through a kernel cmdline option or an env var which
scheme to follow. The idea is that installers use this to set into stone
(a very soft stone though) the scheme used during installation so that
interface naming doesn't change afterwards anymore.
Why use env vars and kernel cmdline options, and not a config file of
its own?
Well, first of all there's no obvious existing one to use. But more
importantly: I have the feeling that this logic is kind of an incomplete
hack, and I simply don't want to do advertise this as a perfectly
working solution. So far we used env vars for the non-so-official
options and proper config files for the official stuff. Given how
incomplete this logic is (i.e. the big variable for naming remains the
kernel, which might expose sysfs attributes in newer versions that we
check for and didn't exist in older versions — and other problems like
this), I am simply not confident in giving this first-class exposure in
a primary configuration file.
Fixes: #10448
This imports the wiki page for predictable interface names. I think it's
useful to preserve history here because it's a contentious subject, and
it's useful to know when what happened.
Patches are shown on github with a fixed width (no matter how wide the window
is). When line numbers are high (we have some files with 5 digit line numbers),
the diff does not fit, and horizontal scrolling must be used when viewing the
patch. This is super annoying. Let's reduce the width a bit. I think 109 is
still very wide, but at least the github issue should be alleviated.
add new "systemd-run-generator" for running arbitrary commands from the kernel command line as system services using the "systemd.run=" kernel command line switch
This adds SuccessActionExitStatus= and FailureActionExitStatus= that may
be used to configure the exit status to propagate in when
SuccessAction=exit or FailureAction=exit is used.
When not specified let's also propagate the exit status of the main
process we fork off for the unit.
The rule is changed from "put in basic unless there's a reason not to" to "put
in shared unless there's a reason not to", to match the change done in previous
commit. This minimizes libbasic. See previous commit for the reasons why this
is useful.
Previously, the guideline was based on whether the files in question use
"publicly exported APIs". This distinction is not particularly relevant. Let's
consider all other programs we compile: most of them use "publicly exported
APIs", usually linking to libsystemd-shared.so for the actual code. But those
programs are not forced to be in src/basic, and the distinction whether they
happen to use 'sd-*.h' or not is of no importance. The same is true for files
in src/shared/. If we didn't have publicly exported shared objects, we'd put
everything in libsystemd-shared.so. So let's only move things out of it that we
need to. Previous guideline was not "wrong", in the sense that it created *a*
split that was functional (no code in src/shared was required in the publicly
exported shared objects), but it put more files in basic/ then necessary.
Not much changes in practice, because (as previous commit shows), moving files
between libbasic.a and libsystemd-shared.so mostly just changes compilation
order.
The list of components which cannot use libsystemd-shared.so is adjusted.
The existing text already said "See below regarding a recommended
vocabulary for boot loader entry identifiers.", but the section for it
was still missing. Let's fill in the missing bits, and describe basic
suggested rules for the boot menu entry identifier vocabulary, in
particular how to identify Windows and MacOS X installations, and how to
name automatic entries vs. explicitly configured ones.
This basically follows the logic implemented in sd-boot these days.
A couple of changes:
1. Clearly name the drop-in entry files "Type #1", and the unified
kernel images "Type #2", and be clearer that the latter is specific
to UEFI.
2. Suffix all directory paths with a trailing "/" to clarify that these
are directories. Also, enclose them all in ``.
3. Add introductory paragraph that explains that there is Type #1 and
Type #2 and what they are about.
4. Explain that Type #2 is about signed UEFI SecureBoot.
5. Don't claim that $BOOT/loader/ contains really all files defined by
the spec, because that's not true, Type #2 images are not located there
after all.
Fixes: #10399
Add LogRateLimitIntervalSec= and LogRateLimitBurst= options for
services. If provided, these values get passed to the journald
client context, and those values are used in the rate limiting
function in the journal over the the journald.conf values.
Part of #10230
When the root account is locked sulogin will either inform you of
this and not allow you in or if --force is used it will hand
you passwordless root (if using a recent enough version of util-linux).
Not being allowed a shell is ofcourse inconvenient, but at the same
time handing out passwordless root unconditionally is probably not
a good idea everywhere.
This patch thus allows to control which behaviour you want by
setting the SYSTEMD_SULOGIN_FORCE environment variable to true
or false to control the behaviour, eg. via adding this to
'systemctl edit rescue.service' (or emergency.service):
[Service]
Environment=SYSTEMD_SULOGIN_FORCE=1
Distributions who used locked root accounts and want the passwordless
behaviour could thus simply drop in the override file in
/etc/systemd/system/rescue.service.d/override.conf
Fixes: #7115
Addresses: https://bugs.debian.org/802211
let's add an env var for this, as this really shouldn't be a top-level
feature, as it turning off the validity checks certainly isn't
advisable.
Fixes: #4925
This was discussed at the systemd hackfest during ASG2018, and
we agreed to use the Ruby text [1] with the enforcement clause based on
the "contributor covenant". I obviously modified the text where applicable
to refer to systemd.
[1] https://www.ruby-lang.org/en/conduct/
Fixes 10148.
Allows configuring the watchdog signal (with a default of SIGABRT).
This allows an alternative to SIGABRT when coredumps are not desirable.
Appropriate references to SIGABRT or aborting were renamed to reflect
more liberal watchdog signals.
Closes#8658
The GitHub guide on contributing file says: "Decide whether to store your
contributing guidelines in your repository's root, docs, or .github directory."
https://help.github.com/articles/setting-guidelines-for-repository-contributors/#adding-a-contributing-file
But there's really no advantage to keeping it in the hidden .github/, since
these are public and really belong together with the other documentation.
We can still keep the issue templates under .github/, since they are not really
documentation on their own.
Updated the links pointing to CONTRIBUTING.md to refer to the one in docs/.
The docs/ directory is special in GitHub, since it can be used to serve GitHub
Pages from, so there's a benefit to switching to it in order to expose it
directly as a website.
Updated references to it from the documentations themselves, from the
CONTRIBUTING.md file and from Meson build files.
So far I avoided adding license headers to meson files, but they are pretty
big and important and should carry license headers like everything else.
I added my own copyright, even though other people modified those files too.
But this is mostly symbolic, so I hope that's OK.
The advantage is that is the name is mispellt, cpp will warn us.
$ git grep -Ee "conf.set\('(HAVE|ENABLE)_" -l|xargs sed -r -i "s/conf.set\('(HAVE|ENABLE)_/conf.set10('\1_/"
$ git grep -Ee '#ifn?def (HAVE|ENABLE)' -l|xargs sed -r -i 's/#ifdef (HAVE|ENABLE)/#if \1/; s/#ifndef (HAVE|ENABLE)/#if ! \1/;'
$ git grep -Ee 'if.*defined\(HAVE' -l|xargs sed -i -r 's/defined\((HAVE_[A-Z0-9_]*)\)/\1/g'
$ git grep -Ee 'if.*defined\(ENABLE' -l|xargs sed -i -r 's/defined\((ENABLE_[A-Z0-9_]*)\)/\1/g'
+ manual changes to meson.build
squash! build-sys: use #if Y instead of #ifdef Y everywhere
v2:
- fix incorrect setting of HAVE_LIBIDN2
Using conf.set() with a boolean argument does the right thing:
either #ifdef or #undef. This means that conf.set can be used unconditionally.
Previously I used '1' as the placeholder value, and that needs to be changed to
'true' for consistency (under meson 1 cannot be used in boolean context). All
checks need to be adjusted.
The indentation for emacs'es meson-mode is added .dir-locals.
All files are reindented automatically, using the lasest meson-mode from git.
Indentation should now be fairly consistent.
It's crucial that we can build systemd using VS2010!
... er, wait, no, that's not the official reason. We need to shed old systems
by requring python 3! Oh, no, it's something else. Maybe we need to throw out
345 years of knowlege accumulated in autotools? Whatever, this new thing is
cool and shiny, let's use it.
This is not complete, I'm throwing it out here for your amusement and critique.
- rules for sd-boot are missing. Those might be quite complicated.
- rules for tests are missing too. Those are probably quite simple and
repetitive, but there's lots of them.
- it's likely that I didn't get all the conditions right, I only tested "full"
compilation where most deps are provided and nothing is disabled.
- busname.target and all .busname units are skipped on purpose.
Otherwise, installation into $DESTDIR has the same list of files and the
autoconf install, except for .la files.
It'd be great if people had a careful look at all the library linking options.
I added stuff until things compiled, and in the end there's much less linking
then in the old system. But it seems that there's still a lot of unnecessary
deps.
meson has a `shared_module` statement, which sounds like something appropriate
for our nss and pam modules. Unfortunately, I couldn't get it to work. For the
nss modules, we need an .so version of '2', but `shared_module` disallows the
version argument. For the pam module, it also didn't work, I forgot the reason.
The handling of .m4 and .in and .m4.in files is rather awkward. It's likely
that this could be simplified. If make support is ever dropped, I think it'd
make sense to switch to a different templating system so that two different
languages and not required, which would make everything simpler yet.
v2:
- use get_pkgconfig_variable
- use sh not bash
- use add_project_arguments
v3:
- drop required:true and fix progs/prog typo
v4:
- use find_library('bz2')
- add TTY_GID definition
- define __SANE_USERSPACE_TYPES__
- use join_paths(prefix, ...) is used on all paths to make them all absolute
v5:
- replace all declare_dependency's with []
- add more conf.get guards around optional components
v6:
- drop -pipe, -Wall which are the default in meson
- use compiler.has_function() and compiler.has_header_symbol instead of the
hand-rolled checks.
- fix duplication in 'liblibsystemd' library name
- use the right .sym file for pam_systemd
- rename 'compiler' to 'cc': shorter, and more idiomatic.
v7:
- use ENABLE_ENVIRONMENT_D not HAVE_ENVIRONMENT_D
- rename prefix to prefixdir, rootprefix to rootprefixdir
("prefix" is too common of a name and too easy to overwrite by mistake)
- wrap more stuff with conf.get('ENABLE...') == 1
- use rootprefix=='/' and rootbindir as install_dir, to fix paths under
split-usr==true.
v8:
- use .split() also for src/coredump. Now everything is consistent ;)
- add rootlibdir option and use it on the libraries that require it
v9:
- indentation
v10:
- fix check for qrencode and libaudit
v11:
- unify handling of executable paths, provide options for all progs
This makes the meson build behave slightly differently than the
autoconf-based one, because we always first try to find the executable in the
filesystem, and fall back to the default. I think different handling of
loadkeys, setfont, and telinit was just a historical accident.
In addition to checking in $PATH, also check /usr/sbin/, /sbin for programs.
In Fedora $PATH includes /usr/sbin, (and /sbin is is a symlink to /usr/sbin),
but in Debian, those directories are not included in the path.
C.f. https://github.com/mesonbuild/meson/issues/1576.
- call all the options 'xxx-path' for clarity.
- sort man/rules/meson.build properly so it's stable
Both gtk-doc and intltoolize have problems with VPATH builds.
"Creatively" disable tests when configuring from outside the
source directory.
This more-or-less reverts 9795da43c.
On systemd systems seasoned admins might be surprised to see that the
init scripts and log files are gone. To ease the transition let's place
some README files there, that hopefully help clearing up the situation.
In 29a00c41 an override was added, but commandline variables have
higher precedence than Makefile variables, so the override was not
effective for commandline variables.
While at it, duplicate for libudev.
gtk-doc add CFLAGS/LDFLAGS multiple times to the gcc command line,
which breaks options that must be listed only once.
For now, clear CFLAGS/LDFLAGS for the intermediate documentation
binary.
