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NEWS: start preparing for v248
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Zbigniew Jędrzejewski-Szmek
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commit
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232
NEWS
232
NEWS
@ -2,13 +2,235 @@ systemd System and Service Manager
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CHANGES WITH 248:
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* A concept of system extension images is introduced. Such images may
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be used to extend the /usr/ and /opt/ directory hierarchies at
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runtime with additional files (even if the file system is read-only).
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When a system extension image is activated, its /usr/ and /opt/
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hierarchies and os-release information are combined via overlayfs
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with the file system hierarchy of the host OS.
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A new systemd-sysext tool can be used to merge, unmerge, list, and
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refresh system extension hierarchies. See
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https://www.freedesktop.org/software/systemd/man/systemd-sysext.html.
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The systemd-sysext.service automatically merges installed system
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extensions during boot (before basic.target, but not in very early
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boot, since various file systems have to be mounted first).
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The SYSEXT_LEVEL= field in os-release(5) may be used to specify the
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supported system extension level.
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* A new configuration file /etc/veritytab may be used to configure
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integrity protection for block devices. Each line is in the format
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"volume-name data-device hash-device roothash options".
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* A new kernel command-line option systemd.verity.root-options= may be
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used to configure dm-verity behaviour for the root device.
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* The key file specified in /etc/crypttab (the third field) may now
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refer to a UNIX socket path. The key is acquired by connecting to
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that socket and reading from it. This allows the implementation of a
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service to provide key information dynamically, at the moment when it
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is needed.
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* Support has been added for extracting the PKCS#11 token URI and
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encrypted key from the LUKS2 JSON embedded metadata header. This
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allows the information how to open the encrypted device to be
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embedded directly in the device and obviates the need for
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configuration in an external file.
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* LUKS devices may now be unlocked using TPM2 hardware.
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* systemd-repart may lock partitions using TPM2 hardware. This may be
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useful for example to create an encrypted /var partition bound to the
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machine on first boot.
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* A new systemd-cryptenroll tool has been added to enroll FIDO2+PKCS#11
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security tokens to LUKS volumes, list and destroy them. See
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https://www.freedesktop.org/software/systemd/man/systemd-cryptenroll.html.
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* The manager may be configured as compile time to use fexecve instead
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of execve when spawning children. Using fexecve closes a window
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between checking the security context of an executable and spawning
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it, but unfortunately the kernel displays stale information in the
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comm field, which impacts ps output and such.
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* The configuration option -Dcompat-gateway-hostname has been dropped.
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"_gateway" is now the only supported name.
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* The ConditionSecurity=tpm2 unit file setting may be used to check
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if the system has at least one TPM2 (tpmrm class) device.
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* The tables of system calls in seccomps filters are now automatically
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generated from kernel lists exported on
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https://fedora.juszkiewicz.com.pl/syscalls.html.
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The following architectures should now have complete lists:
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alpha, arc, arm64, arm, i386, ia64, m68k, mips64n32, mips64, mipso32,
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powerpc, powerpc64, s390, s390x, tilegx, sparc, x86_64, x32.
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* The MountAPIVFS= service file setting now additionally mounts a tmpfs
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on /run/ if it is not already a mount point. A writable /run/ has always
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been a requirement for a functioning system, but this was not
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on /run/ if it is not already a mount point. A writable /run/ has
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always been a requirement for a functioning system, but this was not
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guaranteed when using a read-only image.
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Users can always specify BindPaths= or InaccessiblePaths= as overrides,
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and they will take precedence. If the host's root mount point is used,
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there is no change in behaviour.
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Users can always specify BindPaths= or InaccessiblePaths= as
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overrides, and they will take precedence. If the host's root mount
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point is used, there is no change in behaviour.
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* New bind mounts and file system image mounts may be injected into the
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mount namespace of a service (without restarting it). This is exposed
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as 'systemctl mount-image <unit> <image>…'.
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* The StandardOuput= and StandardError= settings can now specify files
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to be truncated for output (as "truncate:<path>").
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* The ExecPaths= and NoExecPaths= settings may be used to specify
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noexec for parts of the file system.
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* sd-bus has a new function sd_bus_open_use_machine() to open a
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connection to the session bus of a specific user in a local container
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or on the local host. It also gained a convenience function
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sd_bus_reply() to call sd_bus_send() with an existing reply message.
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* sd-event allows rate limits to be set on event sources. See the new
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man page sd_event_source_set_ratelimit(3) for details.
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* systemd.link files gained a [Link] Promiscuous= switch, which allows
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the device to be raised in promiscuous mode.
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New [Link] TransmitQueues= and ReceiveQueues= settings allow the
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number of TX and RX queues to be configured.
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New [Link] TransmitQueueLength= setting allows the size of the TX
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queue to be configured.
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New [Link] GenericSegmentOffloadMaxBytes= and
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GenericSegmentOffloadMaxSegments= allow capping the packet size and
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the number of segments accepted in Generic Segment Offload.
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* systemd.network files gained a [Network] RouteTable= configuration
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switch to select the routing policy table.
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systemd.network files gained a [RoutingPolicyRule] Type=
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configuration switch (one of "blackhole, "unreachable", "prohibit").
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systemd.network files gained a [IPv6AcceptRA] RouteDenyList= and
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RouteAllowList= settings to ignore/accept route advertisements from
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routers matching specified prefixes. The DenyList= setting has been
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renamed to PrefixDenyList= and a new PrefixAllowList= option has been
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added.
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systemd.network files gained a [DHCPv6] UseAddress= setting to
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optionally ignore the address provided in the lease.
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systemd.network files gained a [DHCPv6PrefixDelegation]
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ManageTemporaryAddress= switch.
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* systemd.netdev files gained a [VLAN] Protocol=, IngressQOSMaps=,
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EgressQOSMaps=, and [MACVLAN] BroadcastMulticastQueueLength=
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configuration options for VLAN packet handling.
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* udev rules may now set log_level= option. This allows debug logs to
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be enabled for select events, e.g. just for a specific subsystem or
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even a single device.
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* udev now exports the VOLUME_ID, LOGICAL_VOLUME_ID, VOLUME_SET_ID, and
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DATA_PREPARED_ID attributes for block devices (when available).
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* udev now exports decoded DMI information about memory under the
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/sys/class/dmi/id/ pseudo device.
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* /dev is not mounted noexec any more. This didn't provide any
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significant security benefits and would conflicts with the executable
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mappings used with /dev/sgx device nodes.
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* Permissions for /dev/vsock are now set to 0o666, and /dev/vhost-vsock
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and /dev/vhost-net are owned by the kvm group.
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* The hardware database has been extended with a list of fingerprint
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readers that correctly support autosuspend using data from libfprint.
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* systemd-resolved can now answer DNSSEC questions through the stub
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resolver interface in a way that allows local clients to do DNSSEC
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validation themselves. For a question with DO+CD set, it'll proxy the
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DNS query and respond with a mostly unmodified packet received from
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the upstream server.
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* systemd-nspawn gained a new -ambient-capability= setting
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(AmbientCapability= in .nspawn files) to configure ambient
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capabilities passed to the container payload.
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* systemd-nspawn gained the ability to configure the firewall using the
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nft subsystem (in addition to the existing iptables support).
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* systemd-oomd now gained a new DefaultMemoryPressureDurationSec=
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setting to configure the time a unit's cgroup needs to exceed memory
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pressure limits before action will be taken.
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systemd-oomd is now considered fully supported (the usual
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backwards-compatiblity promises apply). Swap is not required for
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operation, but it is still recommended.
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* systemd-timesyncd gained a new ConnectionRetrySec= setting which
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configures the retry delay when trying to contact servers.
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* systemd-stdio-bridge gained --system/--user options to connect to the
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system bus (previous default) or the user session bus.
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* When the hostname is set to "localhost", systemd-hostnamed will
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accept this. Previously such a setting would be mostly silently
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ignored. The goal is to honour configuration as specified by the
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user.
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* systemd-hostnamed now exports the fallback hostname and the source of
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the configured hostname ("static", "transient", or "fallback") as
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D-Bus properties.
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* systemd-hostnamed now exports the HardwareVendor and HardwareModel
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D-Bus properties. hostnamectl shows this in the status output.
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* systemd-localed may now call locale-gen to generate missing locales
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on-demand (UTF-8-only). This improves integration with Debian-based
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distributions (Debian/Ubuntu/PureOS/Tanglu/...) and Arch Linux.
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* systemctl --check-inhibitors may now be used to obey inhibitors even
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when invoked non-interactively.
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* systemctl import-environment will now emit a warning when called
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without any arguments (i.e. to import the full environment block of
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the called program). This command will usually be invoked from a
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shell, which means that it'll inherit a bunch of variables which are
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specific to that shell, and usually to the TTY the shell is connected
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to, and don't have any meaning in the global context of the system or
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user service manager. Instead, only specific variables should be
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imported into the manager environment block.
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Similarly, programs which update the manager environment block by
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directly calling the D-Bus API of the manager, should also push
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specific variables, and not the full inherited environment.
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* coredumpctl gained a --debugger-arguments= switch to pass arguments
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to the debugger.
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* networkctl now shows the link activation policy in status.
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* Various tools gained --pager/--no-pager/--json switches to
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enable/disable the pager and provide JSON output.
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* Various tools now accept SYSTEMD_COLORS=16|256 to configure what
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colours are used in output.
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* less 568 or newer is now required. Link markup is now always used,
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and older versions will not display it properly. SYSTEMD_URLIFY=0 may
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be used to disable it.
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* Builds with support for separate / and /usr hierarchies (split-usr
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builds, non-merged-usr builds) are now officially deprecated. A
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warning is emitted during build. Support is slated to be removed in
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about a year (when the Debian Bookworm release development starts).
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* The main development branch has been renamed to 'main'.
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CHANGES WITH 247:
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