X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=README;h=73a09e48a6343c9ff249f6e2195928601f056334;hb=1fc605b0e130149a44abfa38c33f4535cfe548ea;hp=b4c474392214651eccb29b153a45cfe440715ccc;hpb=57d0e6b2731ab695d14b7cf496832ba416cc43d3;p=elogind.git
diff --git a/README b/README
index b4c474392..73a09e48a 100644
--- a/README
+++ b/README
@@ -30,15 +30,18 @@ AUTHOR:
LICENSE:
LGPLv2.1+ for all code
- - except sd-daemon.[ch] and sd-readahead.[ch] which are MIT
- - except src/shared/MurmurHash[23].c which is Public Domain
+ - 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
@@ -46,29 +49,28 @@ REQUIREMENTS:
CONFIG_NET
CONFIG_SYSFS
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:
CONFIG_DMIID
- Mount and bind mount handling might require it:
- CONFIG_FHANDLE
-
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
@@ -76,12 +78,19 @@ REQUIREMENTS:
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
@@ -90,33 +99,41 @@ REQUIREMENTS:
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 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
- libblkid >= 2.20 (from util-linux) (optional)
+ libmount >= 2.20 (from util-linux)
+ libseccomp >= 1.0.0 (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
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)
@@ -132,8 +149,8 @@ REQUIREMENTS:
gperf
gtkdocize (optional)
python (optional)
+ python-lxml (optional, but required to build the indices)
sphinx (optional)
- python-lxml (entirely optional)
When systemd-hostnamed is used, it is strongly recommended to
install nss-myhostname to ensure that, in a world of
@@ -153,7 +170,7 @@ USERS AND GROUPS:
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
@@ -172,6 +189,39 @@ USERS AND GROUPS:
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
@@ -188,6 +238,9 @@ WARNINGS:
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 to /run.
+
For more information on this issue consult
http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken
@@ -195,3 +248,8 @@ WARNINGS:
(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 offers professional
+ engineering and consulting services for systemd. Please
+ contact Chris Kühl for more information.