NEWS: start preparations for v244
This commit is contained in:
Zbigniew Jędrzejewski-Szmek
parent
738606e452
commit
ee50dada49
149
NEWS
149
NEWS
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@ -1,5 +1,154 @@
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systemd System and Service Manager
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CHANGES WITH 243 in spe:
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* Support for the cpuset cgroups v2 controller has been added.
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Processes may be restricted to specific CPUs using the new
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AllowedCPUs= setting, and to specific memory NUMA nodes using the new
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AllowedMemoryNodes= setting.
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* The signal used in restart jobs (as opposed to e.g. stop jobs) may
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now be configured using a new RestartKillSignal= settting. This
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allows units which signals to request termination to implement
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different behaviour when stopping in preparation for a restart.
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* "systemctl clean" may now be used also for socket, mount, and swap
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units.
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* systemd will also read configuration options from the EFI variable
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SystemdOptions. This may be used to configure systemd behaviour when
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modifying the kernel command line is inconvenient, but configuration
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on disk is read too late, for example for the options related to
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cgroup hierarchy setup. 'bootctl system-options' may be used to
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set the EFI variable.
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* systemd will now disable printk ratelimits in early boot. This should
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allow us to capture more logs from the early boot phase where normal
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storage is not available and the kernel ring buffer is used for
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logging. Configuration on the kernel command line has higher priority
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and overrides the systemd setting.
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systemd programs which log to /dev/kmsg directly use internal
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ratelimits to prevent runaway logging. (Normally this is only used
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during early boot, so in practice this change has very little
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effect.)
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* The special -.service.d dropin directory may be used to add
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configuration that affects all services. The "-.service" service name
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is now disallowed (though hopefully no one would use such a service
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name. -.mount gives us enough grief.)
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* The RuntimeMaxSec= setting is now supported by scopes, not just
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.service units. This is particularly useful for PAM sessions which
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create a scope unit for the user login. systemd.runtime_max_sec=
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setting may used with the pam_systemd module to limit the duration
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of the PAM session, for example for time-limited logins.
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* udev now provides a program (fido_id) that identifies FIDO CTAP1
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("U2F")/CTAP2 security tokens based on the usage declared in their
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report and descriptor and outputs suitable environment variables.
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This replaces the externally maintained whitelists of all known
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security tokens that were used previously.
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* Automatically generated autosuspend udev rules for whitelisted
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devices have been imported from the Chromium OS project. This should
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improve power saving with of many more devices.
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* udev gained a new "CONST{key}=value" setting that allows matching
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against system-wide constants without forking a helper binary.
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Currently "arch" and "virt" keys are supported.
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* udev now opens CDROMs in non-exclusive mode when querying their
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capabilities. This should fix issues where other programs trying to
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use the CDROM cannot gain access to it, but carries a risk of
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interfering with programs writing to the disk, if they did not open
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the device in exclusive mode as they should.
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* systemd-networkd does not create a default route for IPv4 link local
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addressing anymore. The creation of the route was unexpected and was
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breaking routing in various cases, but people who rely on it being
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created implicitly will need to adjust. Such a route may be requested
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with DefaultRouteOnDevice=yes.
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Similarly, systemd-networkd will not assign a link-local IPv6 address
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when IPv6 link-local routing is not enabled.
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* Receive and transmit buffers may now be configured on links with
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the new RxBufferSize= and TxBufferSize= settings.
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* systemd-networkd may now advertise additional IPv6 routes. A new
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[IPv6RoutePrefix] section with Route= and LifetimeSec= options is
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now supported.
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* systemd-networkd may now configure "next hop" routes using the
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[NextHop] section and Gateway= and Id= settings.
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* systemd-networkd will now retain DHCP config on restarts by default
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(but this may be overridden using the KeepConfiguration= setting).
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The default for SendRelease= has been changed to true.
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* The DHCPv4 client now uses the OPTION_INFORMATION_REFRESH_TIME option
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received from the server.
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The client will use the received SIP server list if UseSIP=yes is
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set.
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The client may be configured to request specific options from the
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server using a new RequestOptions= setting.
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A new IPServiceType= setting has been added to configure the "IP
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service type" value used by the client.
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* The DHCPv6 client learnt a new PrefixDelegationHint= option to
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request prefix hints in the DHCPv6 solicitation.
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* systemd-networkd and networkctl may now renew DHCP leases on demand.
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networkctl has a new 'networkctl renew' verb.
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* systemd-networkd may now reconfigure links on demand. networkctl
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gained two new verbs: "reload" will reload the configuration, and
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"reconfigure DEVICE…" will reconfigure one or more devices.
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* .network files may now match on SSID and BSSID of a wireless network,
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i.e. the access point name and hardware address using the new SSID=
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and BSSID= options. networkctl will display the current SSID and
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BSSID for wireless links.
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.network files may also match on the wireless network type using the
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new WirelessType= option.
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* systemd-networkd now includes default configuration that enables
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link-local addressing when connected to an ad-hoc wireless network.
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* The DHCPv4 server may now be configured to emit SIP server list using
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the new EmitSIP= and SIP= settings.
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* systemd-networkd may configure the Traffic Control queueing
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disciplines in the kernel using the new
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[TrafficControlQueueingDiscipline] section and Parent=,
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NetworkEmulatorDelaySec=, NetworkEmulatorDelayJitterSec=,
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NetworkEmulatorPacketLimit=, NetworkEmulatorLossRate= settings.
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* systemd-tmpfiles gained a new w+ setting to append to files.
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* systemd-analyze dump will now report when the memory configuration in
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the kernel does not match what systemd has configured (usually,
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because some external program has modified the kernel configuration
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on its own).
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* journalctl --update-catalog now produces deterministic output (making
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reproducible image builds easier).
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* A new devicetree-overlay setting is now documented in the Boot Loader
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Specification.
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* The default value of the WatchdogSec= setting used in systemd
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services (the ones bundled with the project itself) may be set at
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configuration time using the -Dservice-watchdog= setting. If set to
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empty, the watchdogs will be disabled.
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* libcryptsetup >= 2.0.1 is now required.
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CHANGES WITH 243:
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* This release enables unprivileged programs (i.e. requiring neither
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