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Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 139 |
1 files changed, 139 insertions, 0 deletions
@@ -1,5 +1,144 @@ systemd System and Service Manager +CHANGES WITH 205: + + * Two new unit types have been introduced: + + Scope units are very similar to service units, however, are + created out of pre-existing processes -- instead of PID 1 + forking off the processes. By using scope units it is + possible for system services and applications to group their + own child processes (worker processes) in a powerful way + which then maybe used to organize them, or kill them + together, or apply resource limits on them. + + Slice units may be used to partition system resources in an + hierarchial fashion and then assign other units to them. By + default there are now three slices: system.slice (for all + system services), user.slice (for all user sessions), + machine.slice (for VMs and containers). + + Slices and scopes have been introduced primarily in + context of the work to move cgroup handling to a + single-writer scheme, where only PID 1 + creates/removes/manages cgroups. + + * There's a new concept of "transient" units. In contrast to + normal units these units are created via an API at runtime, + not from configuration from disk. More specifically this + means it is now possible to run arbitrary programs as + independent services, with all execution parameters passed + in via bus APIs rather than read from disk. Transient units + make systemd substantially more dynamic then it ever was, + and useful as a general batch manager. + + * logind has been updated to make use of scope and slice units + for managing user sessions. As a user logs in he will get + his own private slice unit, to which all sessions are added + as scope units. We also added support for automatically + adding an instance of user@.service for the user into the + slice. Effectively logind will no longer create cgroup + hierarchies on its own now, it will defer entirely to PID 1 + for this by means of scope, service and slice units. Since + user sessions this way become entities managed by PID 1 + the output of "systemctl" is now a lot more comprehensive. + + * A new mini-daemon "systemd-machined" has been added which + may be used by virtualization managers to register local + VMs/containers. nspawn has been updated accordingly, and + libvirt will be updated shortly. machined will collect a bit + of meta information about the VMs/containers, and assign + them their own scope unit (see above). The collected + meta-data is then made available via the "machinectl" tool, + and exposed in "ps" and similar tools. machined/machinectl + is compile-time optional. + + * As discussed earlier, the low-level cgroup configuration + options ControlGroup=, ControlGroupModify=, + ControlGroupPersistent=, ControlGroupAttribute= have been + removed. Please use high-level attribute settings instead as + well as slice units. + + * A new bus call SetUnitProperties() has been added to alter + various runtime parameters of a unit. This is primarily + useful to alter cgroup parameters dynamically in a nice way, + but will be extended later on to make more properties + modifiable at runtime. systemctl gained a new set-properties + command that wraps this call. + + * A new tool "systemd-run" has been added which can be used to + run arbitrary command lines as transient services or scopes, + while configuring a number of settings via the command + line. This tool is currently very basic, however already + very useful. We plan to extend this tool to even allow + queuing of execution jobs with time triggers from the + command line, similar in fashion to "at". + + * nspawn will now inform the user explicitly that kernels with + audit enabled break containers, and suggest the user to turn + off audit. + + * Support for detecting the IMA and AppArmor security + frameworks with ConditionSecurity= has been added. + + * journalctl gained a new "-k" switch for showing only kernel + messages. + + * systemd-delta can now show information about drop-in + snippets extending unit files. + + * libsystemd-bus has been substantially updated but is still + not available as public API. + + * systemd will now look for the "debug" argument on the kernel + command line and enable debug logging, similar to + "systemd.log_level=debug" already did before. + + * "systemctl set-default", "systemctl get-default" has been + added to configure the default.target symlink, which + controls what to boot into by default. + + * "systemd-analyze plot" will now show the time the various + generators needed for execution, as well as information + about the unit file loading. + + * journalctl gained new "--user" and "--system" switches to + only show user/system logs. + + * libsystemd-journal gained a new sd_journal_open_files() call + for opening specific journal files. journactl also gained a + new switch to expose this new functionality. Previously we + only supported opening all files from a directory, or all + files from the system, as opening individual files only is + racy due to journal file rotation. + + * systemd gained the new DefaultEnvironment= setting in + /etc/systemd/system.conf to set environment variables for + all services. + + * If a privileged process logs a journal message with the + OBJECT_PID= field set, then journald will automatically + augment this with additional OBJECT_UID=, OBJECT_GID=, + OBJECT_COMM=, OBJECT_EXE=, ... fields. This is useful if + system services want to log events about specific client + processes. journactl/systemctl has been updated to make use + of this information if all log messages regarding a specific + unit is requested. + + Contributions from: Auke Kok, Chengwei Yang, Colin Walters, + Cristian Rodríguez, Daniel Albers, Daniel Wallace, Dave + Reisner, David Coppa, David King, David Strauss, Eelco + Dolstra, Gabriel de Perthuis, Harald Hoyer, Jan Alexander + Steffens, Jan Engelhardt, Jan Janssen, Jason St. John, Johan + Heikkilä, Karel Zak, Karol Lewandowski, Kay Sievers, Lennart + Poettering, Lukas Nykryn, Mantas Mikulėnas, Marius Vollmer, + Martin Pitt, Michael Biebl, Michael Olbrich, Michael Tremer, + Michal Schmidt, Michał Bartoszkiewicz, Nirbheek Chauhan, + Pierre Neidhardt, Ross Burton, Ross Lagerwall, Sean McGovern, + Thomas Hindoe Paaboel Andersen, Tom Gundersen, Umut Tezduyar, + Václav Pavlín, Zachary Cook, Zbigniew Jędrzejewski-Szmek, + Łukasz Stelmach, 장동준 + CHANGES WITH 204: * The Python bindings gained some minimal support for the APIs |