systemd System and Service Manager
-CHANGES WITH 236 in spe:
+CHANGES WITH 238 in spe:
+
+ * The MemoryAccounting= unit property now defaults to on. After
+ discussions with the upstream control group maintainers we learnt
+ that the negative impact of cgroup memory accounting on current
+ kernels is finally relatively minimal, so that it should be safe to
+ enable this by default without affecting system performance. Besides
+ memory accounting only task accounting is turned on by default, all
+ other forms of resource accounting (CPU, IO, IP) remain off for now,
+ because it's not clear yet that their impact is small enough to move
+ from opt-in to opt-out. We recommend downstreams to leave memory
+ accounting on by default if kernel 4.14 or higher is are primarily
+ used. On very resource constrained systems or when support for old
+ kernels is a necessity, -Dmemory-accounting-default=false can be used
+ to revert this change.
+
+CHANGES WITH 237:
+
+ * Some keyboards come with a zoom see-saw or rocker which until now got
+ mapped to the Linux "zoomin/out" keys in hwdb. However, these
+ keycodes are not recognized by any major desktop. They now produce
+ Up/Down key events so that they can be used for scrolling.
+
+ * INCOMPATIBILITY: systemd-tmpfiles' "f" lines changed behaviour
+ slightly: previously, if an argument was specified for lines of this
+ type (i.e. the right-most column was set) this string was appended to
+ existing files each time systemd-tmpfiles was run. This behaviour was
+ different from what the documentation said, and not particularly
+ useful, as repeated systemd-tmpfiles invocations would not be
+ idempotent and grow such files without bounds. With this release
+ behaviour has been altered slightly, to match what the documentation
+ says: lines of this type only have an effect if the indicated files
+ don't exist yet, and only then the argument string is written to the
+ file.
+
+ * FUTURE INCOMPATIBILITY: In systemd v238 we intend to slightly change
+ systemd-tmpfiles behaviour: previously, read-only files owned by root
+ were always excluded from the file "aging" algorithm (i.e. the
+ automatic clean-up of directories like /tmp based on
+ atime/mtime/ctime). We intend to drop this restriction, and age files
+ by default even when owned by root and read-only. This behaviour was
+ inherited from older tools, but there have been requests to remove
+ it, and it's not obvious why this restriction was made in the first
+ place. Please speak up now, if you are aware of software that reqires
+ this behaviour, otherwise we'll remove the restriction in v238.
+
+ * A new environment variable $SYSTEMD_OFFLINE is now understood by
+ systemctl. It takes a boolean argument. If on, systemctl assumes it
+ operates on an "offline" OS tree, and will not attempt to talk to the
+ service manager. Previously, this mode was implicitly enabled if a
+ chroot() environment was detected, and this new environment variable
+ now provides explicit control.
+
+ * .path and .socket units may now be created transiently, too.
+ Previously only service, mount, automount and timer units were
+ supported as transient units. The systemd-run tool has been updated
+ to expose this new functionality, you may hence use it now to bind
+ arbitrary commands to path or socket activation on-the-fly from the
+ command line. Moreover, almost all properties are now exposed for the
+ unit types that already supported transient operation.
+
+ * The systemd-mount command gained support for a new --owner= parameter
+ which takes a user name, which is then resolved and included in uid=
+ and gid= mount options string of the file system to mount.
+
+ * A new unit condition ConditionControlGroupController= has been added
+ that checks whether a specific cgroup controller is available.
+
+ * Unit files, udev's .link files, and systemd-networkd's .netdev and
+ .network files all gained support for a new condition
+ ConditionKernelVersion= for checking against specific kernel
+ versions.
+
+ * In systemd-networkd, the [IPVLAN] section in .netdev files gained
+ support for configuring device flags in the Flags= setting. In the
+ same files, the [Tunnel] section gained support for configuring
+ AllowLocalRemote=. The [Route] section in .network files gained
+ support for configuring InitialCongestionWindow=,
+ InitialAdvertisedReceiveWindow= and QuickAck=. The [DHCP] section now
+ understands RapidCommit=.
+
+ * systemd-networkd's DHCPv6 support gained support for Prefix
+ Delegation.
+
+ * sd-bus gained support for a new "watch-bind" feature. When this
+ feature is enabled, an sd_bus connection may be set up to connect to
+ an AF_UNIX socket in the file system as soon as it is created. This
+ functionality is useful for writing early-boot services that
+ automatically connect to the system bus as soon as it is started,
+ without ugly time-based polling. systemd-networkd and
+ systemd-resolved have been updated to make use of this
+ functionality. busctl exposes this functionality in a new
+ --watch-bind= command line switch.
+
+ * sd-bus will now optionally synthesize a local "Connected" signal as
+ soon as a D-Bus connection is set up fully. This message mirrors the
+ already existing "Disconnected" signal which is synthesized when the
+ connection is terminated. This signal is generally useful but
+ particularly handy in combination with the "watch-bind" feature
+ described above. Synthesizing of this message has to be requested
+ explicitly through the new API call sd_bus_set_connected_signal(). In
+ addition a new call sd_bus_is_ready() has been added that checks
+ whether a connection is fully set up (i.e. between the "Connected" and
+ "Disconnected" signals).
+
+ * sd-bus gained two new calls sd_bus_request_name_async() and
+ sd_bus_release_name_async() for asynchronously registering bus
+ names. Similar, there is now sd_bus_add_match_async() for installing
+ a signal match asynchronously. All of systemd's own services have
+ been updated to make use of these calls. Doing these operations
+ asynchronously has two benefits: it reduces the risk of deadlocks in
+ case of cyclic dependencies between bus services, and it speeds up
+ service initialization since synchronization points for bus
+ round-trips are removed.
+
+ * sd-bus gained two new calls sd_bus_match_signal() and
+ sd_bus_match_signal_async(), which are similar to sd_bus_add_match()
+ and sd_bus_add_match_async() but instead of taking a D-Bus match
+ string take match fields as normal function parameters.
+
+ * sd-bus gained two new calls sd_bus_set_sender() and
+ sd_bus_message_set_sender() for setting the sender name of outgoing
+ messages (either for all outgoing messages or for just one specific
+ one). These calls are only useful in direct connections as on
+ brokered connections the broker fills in the sender anyway,
+ overwriting whatever the client filled in.
+
+ * sd-event gained a new pseudo-handle that may be specified on all API
+ calls where an "sd_event*" object is expected: SD_EVENT_DEFAULT. When
+ used this refers to the default event loop object of the calling
+ thread. Note however that this does not implicitly allocate one —
+ which has to be done prior by using sd_event_default(). Similarly
+ sd-bus gained three new pseudo-handles SD_BUS_DEFAULT,
+ SD_BUS_DEFAULT_USER, SD_BUS_DEFAULT_SYSTEM that may be used to refer
+ to the default bus of the specified type of the calling thread. Here
+ too this does not implicitly allocate bus connection objects, this
+ has to be done prior with sd_bus_default() and friends.
+
+ * sd-event gained a new call pair
+ sd_event_source_{get|set}_io_fd_own(). This may be used to request
+ automatic closure of the file descriptor an IO event source watches
+ when the event source is destroyed.
+
+ * systemd-networkd gained support for natively configuring WireGuard
+ connections.
+
+ * In previous versions systemd synthesized user records both for the
+ "nobody" (UID 65534) and "root" (UID 0) users in nss-systemd and
+ internally. In order to simplify distribution-wide renames of the
+ "nobody" user (like it is planned in Fedora: nfsnobody → nobody), a
+ new transitional flag file has been added: if
+ /etc/systemd/dont-synthesize-nobody exists synthesizing of the 65534
+ user and group record within the systemd codebase is disabled.
+
+ * systemd-notify gained a new --uid= option for selecting the source
+ user/UID to use for notification messages sent to the service
+ manager.
+
+ * journalctl gained a new --grep= option to list only entries in which
+ the message matches a certain pattern. By default matching is case
+ insensitive if the pattern is lowercase, and case sensitive
+ otherwise. Option --case-sensitive=yes|no can be used to override
+ this an specify case sensitivity or case insensitivity.
+
+ * There's now a "systemd-analyze service-watchdogs" command for printing
+ the current state of the service runtime watchdog, and optionally
+ enabling or disabling the per-service watchdogs system-wide if given a
+ boolean argument (i.e. the concept you configure in WatchdogSec=), for
+ debugging purposes. There's also a kernel command line option
+ systemd.service_watchdogs= for controlling the same.
+
+ * Two new "log-level" and "log-target" options for systemd-analyze were
+ addded that merge the now deprecated get-log-level, set-log-level and
+ get-log-target, set-log-target pairs. The deprecated options are still
+ understood for backwards compatibility. The two new options print the
+ current value when no arguments are given, and set them when a
+ level/target is given as an argument.
+
+ * sysusers.d's "u" lines now optionally accept both a UID and a GID
+ specification, separated by a ":" character, in order to create users
+ where UID and GID do not match.
+
+ Contributions from: Adam Duskett, Alan Jenkins, Alexander Kuleshov,
+ Alexis Deruelle, Andrew Jeddeloh, Armin Widegreen, Batuhan Osman
+ Taşkaya, Björn Esser, bleep_blop, Bruce A. Johnson, Chris Down, Clinton
+ Roy, Colin Walters, Daniel Rusek, Dimitri John Ledkov, Dmitry Rozhkov,
+ Evgeny Vereshchagin, Ewout van Mansom, Felipe Sateler, Franck Bui,
+ Frantisek Sumsal, George Gaydarov, Gianluca Boiano, Hans-Christian
+ Noren Egtvedt, Hans de Goede, Henrik Grindal Bakken, Jan Alexander
+ Steffens, Jan Klötzke, Jason A. Donenfeld, jdkbx, Jérémy Rosen,
+ Jerónimo Borque, John Lin, John Paul Herold, Jonathan Rudenberg, Jörg
+ Thalheim, Ken (Bitsko) MacLeod, Larry Bernstone, Lennart Poettering,
+ Lucas Werkmeister, Maciej S. Szmigiero, Marek Čermák, Martin Pitt,
+ Mathieu Malaterre, Matthew Thode, Matthias-Christian Ott, Max Harmathy,
+ Michael Biebl, Michael Vogt, Michal Koutný, Michal Sekletar, Michał
+ Szczepański, Mike Gilbert, Nathaniel McCallum, Nicolas Chauvet, Olaf
+ Hering, Olivier Schwander, Patrik Flykt, Paul Cercueil, Peter Hutterer,
+ Piotr Drąg, Raphael Vogelgsang, Reverend Homer, Robert Kolchmeyer,
+ Samuel Dionne-Riel, Sergey Ptashnick, Shawn Landden, Susant Sahani,
+ Sylvain Plantefève, Thomas H. P. Andersen, Thomas Huth, Tomasz
+ Bachorski, Vladislav Vishnyakov, Wieland Hoffmann, Yu Watanabe, Zachary
+ Winnerman, Zbigniew Jędrzejewski-Szmek, Дамјан Георгиевски, Дилян
+ Палаузов
+
+ — Brno, 2018-01-28
+
+CHANGES WITH 236:
* The modprobe.d/ drop-in for the bonding.ko kernel module introduced
in v235 has been extended to also set the dummy.ko module option
numdummies=0, preventing the kernel from automatically creating
dummy0. All dummy interfaces must now be explicitly created.
- * Unknown specifiers are now rejected. This applies to units and
- tmpfiles.d configuration. Any percent characters that are followed by
- a letter or digit that are not supposed to be interpreted as the
- beginning of a specifier should be escaped by doubling ("%%").
- (So "size=5%" is still accepted, as well as "size=5%,foo=bar", but
- not "LABEL=x%y%z" since %y and %z are not valid specifiers today.)
+ * Unknown '%' specifiers in configuration files are now rejected. This
+ applies to units and tmpfiles.d configuration. Any percent characters
+ that are followed by a letter or digit that are not supposed to be
+ interpreted as the beginning of a specifier should be escaped by
+ doubling ("%%"). (So "size=5%" is still accepted, as well as
+ "size=5%,foo=bar", but not "LABEL=x%y%z" since %y and %z are not
+ valid specifiers today.)
* systemd-resolved now maintains a new dynamic
/run/systemd/resolve/stub-resolv.conf compatibility file. It is
enabled in /etc/nsswitch.conf to ensure the UIDs assigned to these
services are resolved properly.
+ * In /etc/fstab two new mount options are now understood:
+ x-systemd.makefs and x-systemd.growfs. The former has the effect that
+ the configured file system is formatted before it is mounted, the
+ latter that the file system is resized to the full block device size
+ after it is mounted (i.e. if the file system is smaller than the
+ partition it resides on, it's grown). This is similar to the fsck
+ logic in /etc/fstab, and pulls in systemd-makefs@.service and
+ systemd-growfs@.service as necessary, similar to
+ systemd-fsck@.service. Resizing is currently only supported on ext4
+ and btrfs.
+
* In systemd-networkd, the IPv6 RA logic now optionally may announce
DNS server and domain information.
store again, ahead of POLLHUP or POLLERR when they are removed
anyway.
- Contributions from: aeywalee, Alan Jenkins, Alessandro Ghedini, Andrew
- Jeddeloh, Antonio Rojas, Ari, bleep_blop, Carsten Strotmann, Christian
- Brauner, Christian Hesse, Collin Eggert, Daniel Lockyer, Daniel Rusek,
- Dimitri John Ledkov, Evgeny Vereshchagin, Florian Klink, Franck Bui,
- gwendalcr, Hans de Goede, Jakub Wilk, Jérémy Rosen, jobol, John Lin,
- juga0, Krzysztof Nowicki, Lars Karlitski, Lars Kellogg-Stedman, Lauri
- Tirkkonen, Lennart Poettering, longersson, Lubomir Rintel, Lucas
- Werkmeister, lukas, Lukáš Nykrýn, Lukasz Rubaszewski, Maciej
- S. Szmigiero, macrothian, Mantas Mikulėnas, martingh, Mathieu
- Trudel-Lapierre, Matija Skala, Michael Biebl, Michael Vogt, Michal
- Sekletar, Mike Gilbert, Muhammet Kara, myrkr, Neil Brown, Ondrej
- Kozina, Patrik Flykt, Peter Hutterer, Piotr Drąg, Razvan Cojocaru,
- Robin McCorkell, Roland Hieber, Sergey Ptashnick, Shawn Landden, Shuang
- Liu, Simon Arlott, Simon Peeters, Stefan Agner, Susant Sahani, Sylvain
- Plantefève, Thomas Blume, Tom Stellard, Topi Miettinen, Vito Caputo,
- Vladislav Vishnyakov, WaLyong Cho, Yu Watanabe, Zbigniew
+ * A new document doc/UIDS-GIDS.md has been added to the source tree,
+ that documents the UID/GID range and assignment assumptions and
+ requirements of systemd.
+
+ * The watchdog device PID 1 will ping may now be configured through the
+ WatchdogDevice= configuration file setting, or by setting the
+ systemd.watchdog_service= kernel commandline option.
+
+ * systemd-resolved's gained support for registering DNS-SD services on
+ the local network using MulticastDNS. Services may either be
+ registered by dropping in a .dnssd file in /etc/systemd/dnssd/ (or
+ the same dir below /run, /usr/lib), or through its D-Bus API.
+
+ * The sd_notify() protocol can now with EXTEND_TIMEOUT_USEC=microsecond
+ extend the effective start, runtime, and stop time. The service must
+ continue to send EXTEND_TIMEOUT_USEC within the period specified to
+ prevent the service manager from making the service as timedout.
+
+ * systemd-resolved's DNSSEC support gained support for RFC 8080
+ (Ed25519 keys and signatures).
+
+ * The systemd-resolve command line tool gained a new set of options
+ --set-dns=, --set-domain=, --set-llmnr=, --set-mdns=, --set-dnssec=,
+ --set-nta= and --revert to configure per-interface DNS configuration
+ dynamically during runtime. It's useful for pushing DNS information
+ into systemd-resolved from DNS hook scripts that various interface
+ managing software supports (such as pppd).
+
+ * systemd-nspawn gained a new --network-namespace-path= command line
+ option, which may be used to make a container join an existing
+ network namespace, by specifying a path to a "netns" file.
+
+ Contributions from: Alan Jenkins, Alan Robertson, Alessandro Ghedini,
+ Andrew Jeddeloh, Antonio Rojas, Ari, asavah, bleep_blop, Carsten
+ Strotmann, Christian Brauner, Christian Hesse, Clinton Roy, Collin
+ Eggert, Cong Wang, Daniel Black, Daniel Lockyer, Daniel Rusek, Dimitri
+ John Ledkov, Dmitry Rozhkov, Dongsu Park, Edward A. James, Evgeny
+ Vereshchagin, Florian Klink, Franck Bui, Gwendal Grignou, Hans de
+ Goede, Harald Hoyer, Hristo Venev, Iago López Galeiras, Ikey Doherty,
+ Jakub Wilk, Jérémy Rosen, Jiahui Xie, John Lin, José Bollo, Josef
+ Andersson, juga0, Krzysztof Nowicki, Kyle Walker, Lars Karlitski, Lars
+ Kellogg-Stedman, Lauri Tirkkonen, Lennart Poettering, Lubomir Rintel,
+ Luca Bruno, Lucas Werkmeister, Lukáš Nykrýn, Lukáš Říha, Lukasz
+ Rubaszewski, Maciej S. Szmigiero, Mantas Mikulėnas, Marcus Folkesson,
+ Martin Steuer, Mathieu Trudel-Lapierre, Matija Skala,
+ Matthias-Christian Ott, Max Resch, Michael Biebl, Michael Vogt, Michal
+ Koutný, Michal Sekletar, Mike Gilbert, Muhammet Kara, Neil Brown, Olaf
+ Hering, Ondrej Kozina, Patrik Flykt, Patryk Kocielnik, Peter Hutterer,
+ Piotr Drąg, Razvan Cojocaru, Robin McCorkell, Roland Hieber, Saran
+ Tunyasuvunakool, Sergey Ptashnick, Shawn Landden, Shuang Liu, Simon
+ Arlott, Simon Peeters, Stanislav Angelovič, Stefan Agner, Susant
+ Sahani, Sylvain Plantefève, Thomas Blume, Thomas Haller, Tiago Salem
+ Herrmann, Tinu Weber, Tom Stellard, Topi Miettinen, Torsten Hilbrich,
+ Vito Caputo, Vladislav Vishnyakov, WaLyong Cho, Yu Watanabe, Zbigniew
Jędrzejewski-Szmek, Zeal Jagannatha
- — Berlin, 2017-12-XX
+ — Berlin, 2017-12-14
CHANGES WITH 235:
* Documentation has been added that lists all of systemd's low-level
environment variables:
- https://github.com/systemd/systemd/blob/master/ENVIRONMENT.md
+ https://github.com/systemd/systemd/blob/master/doc/ENVIRONMENT.md
* sd-daemon gained a new API sd_is_socket_sockaddr() for determining
whether a specific socket file descriptor matches a specified socket
booted up with "systemd-nspawn -b -i", qemu-kvm or on any physical
UEFI PC. This functionality is particularly useful to easily test
local changes made to systemd in a pristine, defined environment. See
- HACKING for details.
+ doc/HACKING for details.
* configure learned the --with-support-url= option to specify the
distribution's bugtracker.
d /run/lock/lockdev 0775 root lock -
+ * The settings StartLimitBurst=, StartLimitInterval=, StartLimitAction=
+ and RebootArgument= have been moved from the [Service] section of
+ unit files to [Unit], and they are now supported on all unit types,
+ not just service units. Of course, systemd will continue to
+ understand these settings also at the old location, in order to
+ maintain compatibility.
+
Contributions from: Abdo Roig-Maranges, Alban Crequy, Aleksander
Adamowski, Alexander Kuleshov, Andreas Pokorny, Andrei Borzenkov,
Andrew Wilcox, Arthur Clement, Beniamino Galvani, Casey Schaufler,
option as supported by Debian is added. It allows indicating
which LUKS slot to use on disk, speeding up key loading.
- * The sd_journald_sendv() API call has been checked and
+ * The sd_journal_sendv() API call has been checked and
officially declared to be async-signal-safe so that it may
be invoked from signal handlers for logging purposes.
projects / thirdparty / systemd.git / blobdiff