-systemd System and Session Manager
+systemd System and Service Manager
DETAILS:
http://0pointer.de/blog/projects/systemd.html
http://www.freedesktop.org/wiki/Software/systemd
GIT:
- git://anongit.freedesktop.org/systemd
- ssh://git.freedesktop.org/git/systemd
+ git://anongit.freedesktop.org/systemd/systemd
+ ssh://git.freedesktop.org/git/systemd/systemd
GITWEB:
- http://cgit.freedesktop.org/systemd/
+ http://cgit.freedesktop.org/systemd/systemd
MAILING LIST:
http://lists.freedesktop.org/mailman/listinfo/systemd-devel
https://bugs.freedesktop.org/enter_bug.cgi?product=systemd
AUTHOR:
- Lennart Poettering with major support from Kay Sievers
+ Lennart Poettering
+ Kay Sievers
+ ...and many others
LICENSE:
- GPLv2+ for all code, except sd-daemon.[ch] which is MIT
+ LGPLv2.1+ for all code
+ - except sd-readahead.[ch] which is MIT
+ - except src/shared/MurmurHash2.c which is Public Domain
+ - except src/shared/siphash24.c which is CC0 Public Domain
+ - except src/journal/lookup3.c which is Public Domain
+ - except src/udev/* which is (currently still) GPLv2, GPLv2+
REQUIREMENTS:
- Linux kernel >= 2.6.39 (with devtmpfs, cgroups; optional but strongly recommended: autofs4, ipv6)
- libudev >= 172
- dbus >= 1.4.0
+ Linux kernel >= 3.0
+ Linux kernel >= 3.3 for loop device partition support features with nspawn
+ Linux kernel >= 3.8 for Smack support
+
+ Kernel Config Options:
+ CONFIG_DEVTMPFS
+ CONFIG_CGROUPS (it's OK to disable all controllers)
+ CONFIG_INOTIFY_USER
+ CONFIG_SIGNALFD
+ CONFIG_TIMERFD
+ CONFIG_EPOLL
+ CONFIG_NET
+ CONFIG_SYSFS
+ CONFIG_PROC_FS
+ CONFIG_FHANDLE (libudev, mount and bind mount handling)
+
+ Udev will fail to work with the legacy layout:
+ CONFIG_SYSFS_DEPRECATED=n
+
+ Legacy hotplug slows down the system and confuses udev:
+ CONFIG_UEVENT_HELPER_PATH=""
+
+ Userspace firmware loading is deprecated, will go away, and
+ sometimes causes problems:
+ CONFIG_FW_LOADER_USER_HELPER=n
+
+ Some udev rules and virtualization detection relies on it:
+ CONFIG_DMIID
+
+ Support for some SCSI devices serial number retrieval, to
+ create additional symlinks in /dev/disk/ and /dev/tape:
+ CONFIG_BLK_DEV_BSG
+
+ Required for PrivateNetwork in service units:
+ CONFIG_NET_NS
+
+ Optional but strongly recommended:
+ CONFIG_IPV6
+ CONFIG_AUTOFS4_FS
+ CONFIG_TMPFS_POSIX_ACL
+ CONFIG_TMPFS_XATTR
+ CONFIG_SECCOMP
+
+ For systemd-bootchart, several proc debug interfaces are required:
+ CONFIG_SCHEDSTATS
+ CONFIG_SCHED_DEBUG
+
+ For UEFI systems:
+ CONFIG_EFIVAR_FS
+ CONFIG_EFI_PARTITION
+
+ Note that kernel auditing is broken when used with systemd's
+ container code. When using systemd in conjunction with
+ containers, please make sure to either turn off auditing at
+ runtime using the kernel command line option "audit=0", or
+ turn it off at kernel compile time using:
+ CONFIG_AUDIT=n
+ If systemd is compiled with libseccomp support on
+ architectures which do not use socketcall() and where seccomp
+ is supported (this effectively means x86-64 and ARM, but
+ excludes 32bit x86!), then nspawn will now install a
+ work-around seccomp filter that makes containers boot even
+ with audit being enabled. This works correctly only on kernels
+ 3.14 and newer though. TL;DR: turn audit off, still.
+
+ glibc >= 2.14
libcap
- gtk+ >= 2.20 (optional)
+ libseccomp >= 1.0.0 (optional)
+ libblkid >= 2.20 (from util-linux) (optional)
+ libkmod >= 15 (optional)
PAM >= 1.1.2 (optional)
libcryptsetup (optional)
libaudit (optional)
+ libacl (optional)
+ libattr (optional)
libselinux (optional)
- tcpwrappers (optional)
- libnotify (optional)
+ liblzma (optional)
+ libgcrypt (optional)
+ libqrencode (optional)
+ libmicrohttpd (optional)
+ libpython (optional)
+ make, gcc, and similar tools
+
+ During runtime, you need the following additional
+ dependencies:
+
+ util-linux >= v2.19 (requires fsck -l, agetty -s),
+ v2.21 required for tests in test/
+ dbus >= 1.4.0 (strictly speaking optional, but recommended)
+ sulogin (from util-linux >= 2.22 or sysvinit-tools, optional but recommended,
+ required for tests in test/)
+ dracut (optional)
+ PolicyKit (optional)
- When you build from git you need the following additional dependencies:
+ When building from git, you need the following additional
+ dependencies:
- vala >= 0.10
docbook-xsl
xsltproc
automake
autoconf
libtool
+ intltool
gperf
- make, gcc, and similar tools
+ gtkdocize (optional)
+ python (optional)
+ python-lxml (optional, but required to build the indices)
+ sphinx (optional)
+
+ When systemd-hostnamed is used, it is strongly recommended to
+ install nss-myhostname to ensure that, in a world of
+ dynamically changing hostnames, the hostname stays resolvable
+ under all circumstances. In fact, systemd-hostnamed will warn
+ if nss-myhostname is not installed.
- During runtime you need the following dependencies:
+ To build HTML documentation for python-systemd using sphinx,
+ please first install systemd (using 'make install'), and then
+ invoke sphinx-build with 'make sphinx-<target>', with <target>
+ being 'html' or 'latexpdf'. If using DESTDIR for installation,
+ pass the same DESTDIR to 'make sphinx-html' invocation.
- util-linux > v2.18 (requires fsck -l, agetty -s)
- sulogin (from sysvinit-tools, optional but recommended)
- plymouth (optional)
- dracut (optional)
+USERS AND GROUPS:
+ Default udev rules use the following standard system group
+ names, which need to be resolvable by getgrnam() at any time,
+ even in the very early boot stages, where no other databases
+ and network are available:
- When systemd-hostnamed is used it is strongly recommended to
- install nss-myhostname to ensure that in a world of
- dynamically changing hostnames the hostname stays resolveable
- under all circumstances. In fact, systemd-hostnamed will warn
- if nss-myhostname is not installed. Packagers are encouraged to
- add a dependency on nss-myhostname to the package that
- includes systemd-hostnamed.
+ tty, dialout, kmem, video, audio, lp, floppy, cdrom, tape, disk
+
+ During runtime, the journal daemon requires the
+ "systemd-journal" system group to exist. New journal files will
+ be readable by this group (but not writable), which may be used
+ to grant specific users read access.
+
+ It is also recommended to grant read access to all journal
+ files to the system groups "wheel" and "adm" with a command
+ like the following in the post installation script of the
+ package:
- Note that D-Bus can link against libsystemd-login.so, which
- results in a cyclic build dependency. To accomodate for this
- please build D-Bus without systemd first, then build systemd,
- then rebuild D-Bus with systemd support.
+ # setfacl -nm g:wheel:rx,d:g:wheel:rx,g:adm:rx,d:g:adm:rx /var/log/journal/
+
+ The journal gateway daemon requires the
+ "systemd-journal-gateway" system user and group to
+ exist. During execution this network facing service will drop
+ privileges and assume this uid/gid for security reasons.
WARNINGS:
systemd will warn you during boot if /etc/mtab is not a
systemd will warn you during boot if /usr is on a different
file system than /. While in systemd itself very little will
- break if /usr is on a separate partition many of its
+ break if /usr is on a separate partition, many of its
dependencies very likely will break sooner or later in one
- form or another. For example udev rules tend to refer to
+ form or another. For example, udev rules tend to refer to
binaries in /usr, binaries that link to libraries in /usr or
binaries that refer to data files in /usr. Since these
- breakages are not always directly visible systemd will warn
+ breakages are not always directly visible, systemd will warn
about this, since this kind of file system setup is not really
supported anymore by the basic set of Linux OS components.
+ systemd requires that the /run mount point exists. systemd also
+ requires that /var/run is a a symlink → /run.
+
For more information on this issue consult
http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken
-ENGINEERING AND CONSULTING SERVICES:
- ProFUSION <http://profusion.mobi> offers professional
- engineering and consulting services for systemd for embedded
- and other use. Please contact Gustavo Barbieri
- <barbieri@profusion.mobi> for more information.
-
- Disclaimer: This notice is not a recommendation or official
- endorsement. However, ProFUSION's upstream work has been very
- beneficial for the systemd project.
+ To run systemd under valgrind, compile with VALGRIND defined
+ (e.g. ./configure CPPFLAGS='... -DVALGRIND=1'). Otherwise,
+ false positives will be triggered by code which violates
+ some rules but is actually safe.
~ianmdlvl / elogind.git / blobdiff