systemd System and Service Manager
-CHANGES WITH 225:
+CHANGES WITH 227:
+
+ * systemd now depends on util-linux v2.27. More specifically,
+ the newly added mount monitor feature in libmount now
+ replaces systemd's former own implementation.
+
+ * libmount mandates /etc/mtab not to be regular file, and
+ systemd now enforces this condition at early boot.
+ /etc/mtab has been deprecated and warned about for a very
+ long time, so systems running systemd should already have
+ stopped having this file around as anything else than a
+ symlink to /proc/self/mounts.
+
+ * Support for the "pids" cgroup controller has been added. It
+ allows accounting the number of tasks in a cgroup and
+ enforcing limits on it. This adds two new setting
+ TasksAccounting= and TasksMax= to each unit, as well as a
+ global option DefaultTasksAccounting=.
+
+ * Support for the "net_cls" cgroup controller has been added.
+ It allows assigning a net class ID to each task in the
+ cgroup, which can then be used in firewall rules and traffic
+ shaping configurations. Note that the kernel netfilter net
+ class code does not currently work reliably for ingress
+ packets on unestablished sockets.
+
+ This adds a new config directive called NetClass= to CGroup
+ enabled units. Allowed values are positive numbers for fixed
+ assignments and "auto" for picking a free value
+ automatically.
+
+ * 'systemctl is-system-running' now returns 'offline' if the
+ system is not booted with systemd. This command can now be
+ used as a substitute for 'systemd-notify --booted'.
+
+ * Watchdog timeouts have been increased to 3 minutes for all
+ in-tree service files. Apparently, disk IO issues are more
+ frequent than we hoped, and user reported >1 minute waiting
+ for disk IO.
+
+ * 'machine-id-commit' functionality has been merged into
+ 'machine-id-setup --commit'. The separate binary has been
+ removed.
+
+ * The WorkingDirectory= directive in unit files may now be set
+ to the special value '~'. In this case, the working
+ directory is set to the home directory of the user
+ configured in User=.
+
+ * "machinectl shell" will now open the shell in the home
+ directory of the selected user by default.
+
+ * The CrashChVT= configuration file setting is renamed to
+ CrashChangeVT=, following our usual logic of not
+ abbreviating unnecessarily. The old directive is still
+ supported for compat reasons. Also, this directive now takes
+ an integer value between 1 and 63, or a boolean value. The
+ formerly supported '-1' value for disabling stays around for
+ compat reasons.
+
+ * The PrivateTmp=, PrivateDevices=, PrivateNetwork=,
+ NoNewPrivileges=, TTYPath=, WorkingDirectory= and
+ RootDirectory= properties can now be set for transient
+ units.
- * machinectl gained a new verb 'shell' which opens a fresh shell on the
- target machine. It is similar to 'login', but spawns the shell
- directly. The pseudo machine '.host' now refers to the local host and
- is used by default. Hence, 'machinectl shell' can be used as
- replacement for 'su' which spawns the session as a fresh systemd
- unit.
+ * The systemd-analyze tool gained a new "set-log-target" verb
+ to change the logging target the system manager logs to
+ dynamically during runtime. This is similar to how
+ "systemd-analyze set-log-level" already changes the log
+ level.
+
+ * In nspawn /sys is now mounted as tmpfs, with only a selected
+ set of subdirectories mounted in from the real sysfs. This
+ enhances security slightly, and is useful for ensuring user
+ namespaces work correctly.
+
+ * Support for USB FunctionFS activation has been added. This
+ allows implementation of USB gadget services that are
+ activated as soon as they are requested, so that they don't
+ have to run continously, similar to classic socket
+ activation.
+
+ * The "systemctl exit" command now optionally takes an
+ additional parameter that sets the exit code to return from
+ the systemd manager when exiting. This is only relevant when
+ running the systemd user instance, or when running the
+ system instance in a container.
+
+ * sd-bus gained the new API calls sd_bus_path_encode_many()
+ and sd_bus_path_decode_many() that allow easy encoding and
+ decoding of multiple identifier strings inside a D-Bus
+ object path. Another new call sd_bus_default_flush_close()
+ has been added to flush and close per-thread default
+ connections.
+
+ * systemd-cgtop gained support for a -M/--machine= switch to
+ show the control groups within a certain container only.
+
+ * "systemctl kill" gained support for an optional --fail
+ switch. If specified the requested operation will fail of no
+ processes have been killed, because the unit had no
+ processes attached, or similar.
+
+ * A new systemd.crash_reboot=1 kernel command line option has
+ been added that triggers a reboot after crashing. This can
+ also be set through CrashReboot= in systemd.conf.
+
+ * The RuntimeDirectory= setting now understands unit
+ specifiers like %i or %f.
+
+ * A new (still internal) libary API sd-ipv4acd has been added,
+ that implements address conflict detection for IPv4. It's
+ based on code from sd-ipv4ll, and will be useful for
+ detecting DHCP address conflicts.
+
+ * File descriptors passed during socket activation may now be
+ named. A new API sd_listen_fds_with_names() is added to
+ access the names. The default names may be overriden,
+ either in the .socket file using the FileDescriptorName=
+ parameter, or by passing FDNAME= when storing the file
+ descriptors using sd_notify().
+
+ * systemd-networkd gained support for:
+
+ - Setting the IPv6 Router Advertisment settings via
+ IPv6AcceptRouterAdvertisements= in .network files.
+
+ - Configuring the HelloTimeSec=, MaxAgeSec= and
+ ForwardDelaySec= bridge parameters in .netdev files.
+
+ - Configuring PreferredSource= for static routes in
+ .network files.
+
+ * The "ask-password" framework used to query for LUKS harddisk
+ passwords or SSL passwords during boot gained support for
+ caching passwords in the kernel keyring, if it is
+ available. This makes sure that the user only has to type in
+ a passphrase once if there are multiple objects to unlock
+ with the same one. Previously, such password caching was
+ available only when Plymouth was used; this moves the
+ caching logic into the systemd codebase itself. The
+ "systemd-ask-password" utility gained a new --keyname=
+ switch to control which kernel keyring key to use for
+ caching a password in. This functionality is also useful for
+ enabling display managers such as gdm to automatically
+ unlock the user's GNOME keyring if its passphrase, the
+ user's password and the harddisk password are the same, if
+ gdm-autologin is used.
+
+ * When downloading tar or raw images using "machinectl
+ pull-tar" or "machinectl pull-raw", a matching ".nspawn"
+ file is now also downloaded, if it is available and stored
+ next to the image file.
+
+ * Units of type ".socket" gained a new boolean setting
+ Writable= which is only useful in conjunction with
+ ListenSpecial=. If true, enables opening the specified
+ special file in O_RDWR mode rather than O_RDONLY mode.
+
+ * systemd-rfkill has been reworked to become a singleton
+ service that is activated through /dev/rfkill on each rfkill
+ state change and saves the settings to disk. This way,
+ systemd-rfkill is now compatible with devices that exist
+ only intermittendly, and even restores state if the previous
+ system shutdown was abrupt rather than clean.
+
+ * The journal daemon gained support for vacuuming old journal
+ files controlled by the number of files that shall remain,
+ in addition to the already existing control by size and by
+ date. This is useful as journal interleaving performance
+ degrades with too many seperate journal files, and allows
+ putting an effective limit on them. The new setting defaults
+ to 100, but this may be changed by setting SystemMaxFiles=
+ and RuntimeMaxFiles= in journald.conf. Also, the
+ "journalctl" tool gained the new --vacuum-files= switch to
+ manually vacuum journal files to leave only the specified
+ number of files in place.
+
+ * udev will now create /dev/disk/by-path links for ATA devices
+ on kernels where that is supported.
+
+ * Galician, Serbian, Turkish and Korean translations were added.
+
+ Contributions from: Aaro Koskinen, Alban Crequy, Beniamino
+ Galvani, Benjamin Robin, Branislav Blaskovic, Chen-Han Hsiao
+ (Stanley), Daniel Buch, Daniel Machon, Daniel Mack, David
+ Herrmann, David Milburn, doubleodoug, Evgeny Vereshchagin,
+ Felipe Franciosi, Filipe Brandenburger, Fran Dieguez, Gabriel
+ de Perthuis, Georg Müller, Hans de Goede, Hendrik Brueckner,
+ Ivan Shapovalov, Jacob Keller, Jan Engelhardt, Jan Janssen,
+ Jan Synacek, Jens Kuske, Karel Zak, Kay Sievers, Krzesimir
+ Nowak, Krzysztof Kotlenga, Lars Uebernickel, Lennart
+ Poettering, Lukas Nykryn, Łukasz Stelmach, Maciej Wereski,
+ Marcel Holtmann, Marius Thesing, Martin Pitt, Michael Biebl,
+ Michael Gebetsroither, Michal Schmidt, Michal Sekletar, Mike
+ Gilbert, Muhammet Kara, nazgul77, Nicolas Cornu, NoXPhasma,
+ Olof Johansson, Patrik Flykt, Pawel Szewczyk, reverendhomer,
+ Ronny Chevalier, Sangjung Woo, Seong-ho Cho, Susant Sahani,
+ Sylvain Plantefève, Thomas Haller, Thomas Hindoe Paaboel
+ Andersen, Tom Gundersen, Tom Lyon, Viktar Vauchkevich,
+ Zbigniew Jędrzejewski-Szmek, Марко М. Костић
+
+ -- Berlin, 2015-10-07
+
+CHANGES WITH 226:
+
+ * The DHCP implementation of systemd-networkd gained a set of
+ new features:
+
+ - The DHCP server now supports emitting DNS and NTP
+ information. It may be enabled and configured via
+ EmitDNS=, DNS=, EmitNTP=, and NTP=. If transmission of DNS
+ and NTP information is enabled, but no servers are
+ configured, the corresponding uplink information (if there
+ is any) is propagated.
+
+ - Server and client now support transmission and reception
+ of timezone information. It can be configured via the
+ newly introduced network options UseTimezone=,
+ EmitTimezone=, and Timezone=. Transmission of timezone
+ information is enabled between host and containers by
+ default now: the container will change its local timezone
+ to what the host has set.
+
+ - Lease timeouts can now be configured via
+ MaxLeaseTimeSec= and DefaultLeaseTimeSec=.
+
+ - The DHCP server improved on the stability of
+ leases. Clients are more likely to get the same lease
+ information back, even if the server loses state.
+
+ - The DHCP server supports two new configuration options to
+ control the lease address pool metrics, PoolOffset= and
+ PoolSize=.
+
+ * The encapsulation limit of tunnels in systemd-networkd may
+ now be configured via 'EncapsulationLimit='. It allows
+ modifying the maximum additional levels of encapsulation
+ that are permitted to be prepended to a packet.
+
+ * systemd now supports the concept of user buses replacing
+ session buses, if used with dbus-1.10 (and enabled via dbus
+ --enable-user-session). It previously only supported this on
+ kdbus-enabled systems, and this release expands this to
+ 'dbus-daemon' systems.
+
+ * systemd-networkd now supports predictable interface names
+ for virtio devices.
+
+ * systemd now optionally supports the new Linux kernel
+ "unified" control group hierarchy. If enabled via the kernel
+ command-line option 'systemd.unified_cgroup_hierarchy=1',
+ systemd will try to mount the unified cgroup hierarchy
+ directly on /sys/fs/cgroup. If not enabled, or not
+ available, systemd will fall back to the legacy cgroup
+ hierarchy setup, as before. Host system and containers can
+ mix and match legacy and unified hierarchies as they
+ wish. nspawn understands the $UNIFIED_CROUP_HIERARCHY
+ environment variable to individually select the hierarchy to
+ use for executed containers. By default, nspawn will use the
+ unified hierarchy for the containers if the host uses the
+ unified hierarchy, and the legacy hierarchy otherwise.
+ Please note that at this point the unified hierarchy is an
+ experimental kernel feature and is likely to change in one
+ of the next kernel releases. Therefore, it should not be
+ enabled by default in downstream distributions yet. The
+ minimum required kernel version for the unified hierarchy to
+ work is 4.2. Note that when the unified hierarchy is used
+ for the first time delegated access to controllers is
+ safe. Because of this systemd-nspawn containers will get
+ access to controllers now, as will systemd user
+ sessions. This means containers and user sessions may now
+ manage their own resources, partitioning up what the system
+ grants them.
+
+ * A new special scope unit "init.scope" has been introduced
+ that encapsulates PID 1 of the system. It may be used to
+ determine resource usage and enforce resource limits on PID
+ 1 itself. PID 1 hence moved out of the root of the control
+ group tree.
+
+ * The cgtop tool gained support for filtering out kernel
+ threads when counting tasks in a control group. Also, the
+ count of processes is now recursively summed up by
+ default. Two options -k and --recursive= have been added to
+ revert to old behaviour. The tool has also been updated to
+ work correctly in containers now.
+
+ * systemd-nspawn's --bind= and --bind-ro= options have been
+ extended to allow creation of non-recursive bind mounts.
+
+ * libsystemd gained two new calls sd_pid_get_cgroup() and
+ sd_peer_get_cgroup() which return the control group path of
+ a process or peer of a connected AF_UNIX socket. This
+ function call is particularly useful when implementing
+ delegated subtrees support in the control group hierarchy.
+
+ * The "sd-event" event loop API of libsystemd now supports
+ correct dequeuing of real-time signals, without losing
+ signal events.
+
+ * When systemd requests a PolicyKit decision when managing
+ units it will now add additional fields to the request,
+ including unit name and desired operation. This enables more
+ powerful PolicyKit policies, that make decisions depending
+ on these parameters.
+
+ * nspawn learnt support for .nspawn settings files, that may
+ accompany the image files or directories of containers, and
+ may contain additional settings for the container. This is
+ an alternative to configuring container parameters via the
+ nspawn command line.
+
+ Contributions from: Cristian Rodríguez, Daniel Mack, David
+ Herrmann, Eugene Yakubovich, Evgeny Vereshchagin, Filipe
+ Brandenburger, Hans de Goede, Jan Alexander Steffens, Jan
+ Synacek, Kay Sievers, Lennart Poettering, Mangix, Marcel
+ Holtmann, Martin Pitt, Michael Biebl, Michael Chapman, Michal
+ Sekletar, Peter Hutterer, Piotr Drąg, reverendhomer, Robin
+ Hack, Susant Sahani, Sylvain Pasche, Thomas Hindoe Paaboel
+ Andersen, Tom Gundersen, Torstein Husebø
+
+ -- Berlin, 2015-09-08
- * systemd-networkd learned to cope with private-zone DHCP options and
- allows other programs to query the values.
+CHANGES WITH 225:
+
+ * machinectl gained a new verb 'shell' which opens a fresh
+ shell on the target container or the host. It is similar to
+ the existing 'login' command of machinectl, but spawns the
+ shell directly without prompting for username or
+ password. The pseudo machine '.host' now refers to the local
+ host and is used by default. Hence, 'machinectl shell' can
+ be used as replacement for 'su -' which spawns a session as
+ a fresh systemd unit in a way that is fully isolated from
+ the originating session.
+
+ * systemd-networkd learned to cope with private-zone DHCP
+ options and allows other programs to query the values.
+
+ * SELinux access control when enabling/disabling units is no
+ longer enforced with this release. The previous
+ implementation was incorrect, and a new corrected
+ implementation is not yet available. As unit file operations
+ are still protected via PolicyKit and D-Bus policy this is
+ not a security problem. Yet, distributions which care about
+ optimal SELinux support should probably not stabilize on
+ this release.
+
+ * sd-bus gained support for matches of type "arg0has=", that
+ test for membership of strings in string arrays sent in bus
+ messages.
- Contributions from: Alastair Hughes, Alex Crawford, Daniel Mack, David
- Herrmann, Dimitri John Ledkov, Eric Kostrowski, Evgeny Vereshchagin,
- Felipe Sateler, HATAYAMA Daisuke, Jan Pokorný, Jan Synacek, Johnny
- Robeson, Karel Zak, Kay Sievers, Kefeng Wang, Lennart Poettering, Major
- Hayden, Marcel Holtmann, Markus Elfring, Martin Mikkelsen, Martin Pitt,
- Matt Turner, Maxim Mikityanskiy, Michael Biebl, Namhyung Kim, Nicolas
- Cornu, Owen W. Taylor, Patrik Flykt, Peter Hutterer, reverendhomer,
- Richard Maw, Ronny Chevalier, Seth Jennings, Stef Walter, Susant Sahani,
- Thomas Blume, Thomas Hindoe Paaboel Andersen, Thomas Meyer, Tom
- Gundersen, Vincent Batts, WaLyong Cho, Zbigniew Jędrzejewski-Szmek
+ * systemd-resolved now dumps the contents of its DNS and LLMNR
+ caches to the logs on reception of the SIGUSR1 signal. This
+ is useful to debug DNS behaviour.
+
+ * The coredumpctl tool gained a new --directory= option to
+ operate on journal files in a specific directory.
+
+ * "systemctl reboot" and related commands gained a new
+ "--message=" option which may be used to set a free-text
+ wall message when shutting down or rebooting the
+ system. This message is also logged, which is useful for
+ figuring out the reason for a reboot or shutdown a
+ posteriori.
+
+ * The "systemd-resolve-host" tool's -i switch now takes
+ network interface numbers as alternative to interface names.
+
+ * A new unit file setting for services has been introduced:
+ UtmpMode= allows configuration of how precisely systemd
+ handles utmp and wtmp entries for the service if this is
+ enabled. This allows writing services that appear similar to
+ user sessions in the output of the "w", "who", "last" and
+ "lastlog" tools.
+
+ * systemd-resolved will now locally synthesize DNS resource
+ records for the "localhost" and "gateway" domains as well as
+ the local hostname. This should ensure that clients querying
+ RRs via resolved will get similar results as those going via
+ NSS, if nss-myhostname is enabled.
+
+ Contributions from: Alastair Hughes, Alex Crawford, Daniel
+ Mack, David Herrmann, Dimitri John Ledkov, Eric Kostrowski,
+ Evgeny Vereshchagin, Felipe Sateler, HATAYAMA Daisuke, Jan
+ Pokorný, Jan Synacek, Johnny Robeson, Karel Zak, Kay Sievers,
+ Kefeng Wang, Lennart Poettering, Major Hayden, Marcel
+ Holtmann, Markus Elfring, Martin Mikkelsen, Martin Pitt, Matt
+ Turner, Maxim Mikityanskiy, Michael Biebl, Namhyung Kim,
+ Nicolas Cornu, Owen W. Taylor, Patrik Flykt, Peter Hutterer,
+ reverendhomer, Richard Maw, Ronny Chevalier, Seth Jennings,
+ Stef Walter, Susant Sahani, Thomas Blume, Thomas Hindoe
+ Paaboel Andersen, Thomas Meyer, Tom Gundersen, Vincent Batts,
+ WaLyong Cho, Zbigniew Jędrzejewski-Szmek
-- Berlin, 2015-08-27
* The systemd-efi-boot-generator functionality was merged into
systemd-gpt-auto-generator.
- * systemd-networkd now supports Group Policy for vxlan devices. It can
- be enabled via the new boolean configuration option called
- 'GroupPolicyExtension='.
+ * systemd-networkd now supports Group Policy for vxlan
+ devices. It can be enabled via the new boolean configuration
+ option called 'GroupPolicyExtension='.
Contributions from: Andreas Kempf, Christian Hesse, Daniel Mack, David
Herrmann, Herman Fries, Johannes Nixdorf, Kay Sievers, Lennart
~ianmdlvl / elogind.git / blobdiff