LICENSE:
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 >= 3.0
+ Linux kernel >= 3.7
+ Linux kernel >= 3.8 for Smack support
+
+ Kernel Config Options:
CONFIG_DEVTMPFS
- CONFIG_CGROUPS (it's OK to disable all controllers)
+ CONFIG_CGROUPS (it is OK to disable all controllers)
CONFIG_INOTIFY_USER
CONFIG_SIGNALFD
CONFIG_TIMERFD
CONFIG_PROC_FS
CONFIG_FHANDLE (libudev, mount and bind mount handling)
- Linux kernel >= 3.8 for Smack support
-
- Udev will fail to work with the legacy layout:
+ udev will fail to work with the legacy sysfs 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:
+ Userspace firmware loading is not supported and should
+ be disabled in the kernel:
CONFIG_FW_LOADER_USER_HELPER=n
Some udev rules and virtualization detection relies on it:
create additional symlinks in /dev/disk/ and /dev/tape:
CONFIG_BLK_DEV_BSG
+ Required for PrivateNetwork and PrivateDevices in service units:
+ CONFIG_NET_NS
+ CONFIG_DEVPTS_MULTIPLE_INSTANCES
+ Note that systemd-localed.service and other systemd units use
+ PrivateNetwork and PrivateDevices so this is effectively required.
+
Optional but strongly recommended:
CONFIG_IPV6
CONFIG_AUTOFS4_FS
CONFIG_TMPFS_XATTR
CONFIG_SECCOMP
+ Required for CPUShares in resource control unit settings
+ CONFIG_CGROUP_SCHED
+ CONFIG_FAIR_GROUP_SCHED
+
+ Required for CPUQuota in resource control unit settings
+ CONFIG_CFS_BANDWIDTH
+
For systemd-bootchart, several proc debug interfaces are required:
CONFIG_SCHEDSTATS
CONFIG_SCHED_DEBUG
For UEFI systems:
- CONFIG_EFI_VARS
+ CONFIG_EFIVAR_FS
CONFIG_EFI_PARTITION
Note that kernel auditing is broken when used with systemd's
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
+ excludes 32-bit 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
+ libmount >= 2.20 (from util-linux)
libseccomp >= 1.0.0 (optional)
- libblkid >= 2.20 (from util-linux) (optional)
+ libblkid >= 2.24 (from util-linux) (optional)
libkmod >= 15 (optional)
PAM >= 1.1.2 (optional)
libcryptsetup (optional)
libaudit (optional)
libacl (optional)
- libattr (optional)
libselinux (optional)
liblzma (optional)
- tcpwrappers (optional)
+ liblz4 >= 119 (optional)
libgcrypt (optional)
libqrencode (optional)
libmicrohttpd (optional)
libpython (optional)
+ libidn (optional)
+ gobject-introspection > 1.40.0 (optional)
+ elfutils >= 158 (optional)
make, gcc, and similar tools
- To sucessfully use --compat-libs, gcc >= 4.8 seems necessary.
-
During runtime, you need the following additional
dependencies:
- util-linux >= v2.19 (requires fsck -l, agetty -s),
- v2.21 required for tests in test/
+ util-linux >= v2.25 required
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 building from git, you need the following additional
dependencies:
+ pkg-config
docbook-xsl
xsltproc
automake
even in the very early boot stages, where no other databases
and network are available:
- tty, dialout, kmem, video, audio, lp, floppy, cdrom, tape, disk
+ audio, cdrom, dialout, disk, input, kmem, lp, tape, tty, video
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:
-
- # setfacl -nm g:wheel:rx,d:g:wheel:rx,g:adm:rx,d:g:adm:rx /var/log/journal/
+ to grant specific users read access. In addition, system
+ groups "wheel" and "adm" will be given read-only access to
+ journal files using systemd-tmpfiles.service.
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.
+ Similarly, the NTP daemon requires the "systemd-timesync" system
+ user and group to exist.
+
+ Similarly, the network management daemon requires the
+ "systemd-network" system user and group to exist.
+
+ Similarly, the name resolution daemon requires the
+ "systemd-resolve" system user and group to exist.
+
+ Similarly, the kdbus dbus1 proxy daemon requires the
+ "systemd-bus-proxy" system user and group to exist.
+
+NSS:
+ systemd ships with three NSS modules:
+
+ nss-myhostname resolves the local hostname to locally
+ configured IP addresses, as well as "localhost" to
+ 127.0.0.1/::1.
+
+ nss-resolve enables DNS resolution via the systemd-resolved
+ DNS/LLMNR caching stub resolver "systemd-resolved".
+
+ nss-mymachines enables resolution of all local containers
+ registered with machined to their respective IP addresses.
+
+ To make use of these NSS modules, please add them to the
+ "hosts: " line in /etc/nsswitch.conf. The "resolve" module
+ should replace the glibc "dns" module in this file.
+
+ The three modules should be used in the following order:
+
+ hosts: files mymachines resolve myhostname
+
WARNINGS:
systemd will warn you during boot if /etc/mtab is not a
symlink to /proc/mounts. Please ensure that /etc/mtab is a
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.
+ requires that /var/run is a a symlink to /run.
For more information on this issue consult
http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken
(e.g. ./configure CPPFLAGS='... -DVALGRIND=1'). Otherwise,
false positives will be triggered by code which violates
some rules but is actually safe.
+
+ENGINEERING AND CONSULTING SERVICES:
+ ENDOCODE <https://endocode.com/> offers professional
+ engineering and consulting services for systemd. Please
+ contact Chris Kühl <chris@endocode.com> for more information.
~ianmdlvl / elogind.git / blobdiff