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NEWS: start preparing v245
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Lennart Poettering
parent
2462111da9
commit
723822f00a
141
NEWS
141
NEWS
@ -1,5 +1,146 @@
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systemd System and Service Manager
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CHANGES WITH 245 in spe:
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* When systemd-tmpfiles copies a file tree using the 'C' line type it
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will now implicitly label every copied file matching the SELinux
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database.
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* When systemd/PID 1 detects it is used in the initrd it will now boot
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into initrd.target rather than default.target by default. This should
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make it simpler to build initrds with systemd as for many cases the
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only difference between a host OS image and an initrd image now is
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the /etc/initrd-release file that identifies the initrd as one.
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* A new kernel command line option systemd.cpu_affinity= is now
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understood. It's equivalent to the CPUAffinity= option in
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/etc/systemd/system.conf and allows setting the CPU mask for PID 1
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itself and the default for all forked off processes.
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* When systemd/PID 1 is reloaded (with systemctl daemon-reload or an
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equivalent tool) the SELinux database is now reloaded, ensuring that
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sockets and other file system objects are generated taking the new
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database into account.
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* The sd-event.h API now has native support for the new Linux "pidfd"
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concept. This permits watching processes using file descriptors
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instead of PID numbers, which fixes a number of races and makes
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process supervision more robust and more efficient. All of systemd's
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components will now use pidfds if the kernel supports it for process
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watching, with the exception of PID 1 itself, unfortunately. We hope
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to move PID 1 to exclusively using pidfds too eventually, but this
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requires some more kernel work first. (Background: PID 1 watches
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processes using waitid() with the P_ALL flag, and that does not play
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together nicely with pidfds yet.)
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* Closely related to this, the sd-event.h API gained two new calls
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sd_event_source_send_child_signal() (for sending a signal to a
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watched process) and sd_event_source_get_child_process_own() (for
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marking a process so that it is killed implicitly whenever the event
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source watching it is freed).
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* systemd-networkd gained support for configuring Token Buffer Filter
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(TBF) parameters in its qdisc configuration support. Similar, support
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for Stochastic Fairness Queuing (SFQ), Controlled-Delay Active
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Queue Management (CoDel), Fair Queue (FQ) has been added.
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* systemd-networkd gained support for Intermediate Functional Block
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(IFB) network devices.
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* systemd-networkd gained support for configuring multi-path IP routes,
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using the new MultiPathRoute= setting in the [Route] section.
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* systemd-networkd's DHCPv4 support has been updated to support a new
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SendDecline= option. If enabled duplicate address detection is done
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after a DHCP offer is received from a server. If a conflict is
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detected the address is declined. The DHCPv4 support also gained
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support for a new RouteMTUBytes= setting that allows to configure the
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MTU size to be used for routes generated from DHCPv4 leases.
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* The PrefixRoute= setting in systemd-networkd's [Address] section of
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.network files has been deprecated, and replaced by AddPrefixRoute=,
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with it's sense inverted.
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* The Gateway= setting of [Route] sections of .network files gained
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support for a special new value "dhcp". If set the configured static
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route uses the gateway host configured via DHCP.
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* sd-bus gained a new API call sd_bus_message_sensitive() for marking a
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D-Bus message object as "sensitive". Objects that are marked that way
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are erased from memory when they are freed. This concept is intended
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to be used for messages that contain security sensitive data that
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should be erased after use. A new flag SD_BUS_VTABLE_SENSITIVE has
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been introduced as well that allows marking method calls in sd-bus
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vtables like this, so that this new message flag is implicitly set
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for incoming and outgoing messages of specific methods.
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* systemd-resolved's DNS-over-TLS support gained SNI validation.
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* systemd-growfs (i.e. the x-systemd.growfs mount option in /etc/fstab)
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gained support for growing XFS partitions. Previously it supported
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only ext4 and btrfs partitions.
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* The support for /etc/crypttab gained a new x-initrd.attach option. If
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set the specified encrypted volume is unlocked in the initrd
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already. This concept corresponds to the x-initrd.mount option in
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/etc/fstab.
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* systemd-cryptsetup gained native support for unlocking encrypted
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volumes utilizing PKCS#11 smartcards, i.e. for example to bind
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encryption of volumes to YubiKeys.This is exposed in the new
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pkcs11-uri= option in /etc/crypttab.
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* The https://systemd.io/ web site has been relaunched, directly
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populated with most of the documentation included in the systemd
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repository. In particular, systemd acquired a new logo, thanks to
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Tobias Bernard.
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* systemd-udevd gained support for managing "alternative" network
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interface names, as supported by new Linux kernels. For the first
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time this permits assigning multiple (and longer!) names to a network
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interface. systemd-udevd will now by default assign the names
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generated via all supported naming schemes to each interface in
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parallel. This may be further tweaked with .link drop-in files, and
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the AlternativeName= and AlternativeNamesPolicy= settings. All other
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components of systemd have been updated to support the new
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alternative names too, wherever that is appropriate. For example,
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systemd-nspawn will now generate alternative interface names for the
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host-facing side of container veth links based on the full container
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name without truncation.
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* systemd-nspawn interface naming logic has been updated in another way
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too: if the main interface name (i.e. as opposed to new-style
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"alternative" names) is the truncated result of container name a
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simple hashing scheme is used that ensures that multiple containers
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whose name all begin the same are likely resulting in different
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interface names. Since this changes the primary interface names
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pointing to containers if truncation happens the old scheme may still
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be requested by selecting a different naming scheme than the v245
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one, via the net.naming-scheme= kernel command line option.
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* PrivateUsers= now works in services run by the systemd --user
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per-user instance of the service manager.
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* The Discoverable Partitions Specification has been updated to support
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/var and /var/tmp partition discovery. Support for this has been
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added to systemd-gpt-auto-generator. For details see:
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https://systemd.io/DISCOVERABLE_PARTITIONS
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* "systemctl list-unit-files" has been updated to show a new column
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with the suggested enablement state based on the vendor preset files
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for the respective units.
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* networkctl gained support for showing per-interface logs in its
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"status" output.
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* The [Match] section of .link and .network files now supports a new
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option PermanentMACAddress= which may be used to check against the
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permanent MAC address of a network device even if a randomized MAC
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address is used.
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…
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CHANGES WITH 244:
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* Support for the cpuset cgroups v2 controller has been added.
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