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Beyond Init: systemd LinuxKongress 2010 Lennart Poettering [email protected] September 2010 Lennart Poettering Beyond Init: systemd
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Beyond Init: systemd
LinuxKongress 2010
Lennart [email protected]
September 2010
Lennart Poettering Beyond Init: systemd
Who Am I?
Software Engineer at Red Hat, Inc.
Developer of PulseAudio, Avahi and a few other Free Softwareprojects
http://0pointer.de/lennart/
IRC: mezcalero
Lennart Poettering Beyond Init: systemd
“systemd is a system and session manager for Linux,
compatiblewith SysV and LSB init scripts. systemd provides aggressive
parallelization capabilities, uses socket and D-Bus activation forstarting services, offers on-demand starting of daemons, keeps
track of processes using Linux cgroups, supports snapshotting andrestoring of the system state, maintains mount and automount
points and implements an elaborate transactionaldependency-based service control logic. It can work as a drop-in
replacement for sysvinit.”
Lennart Poettering Beyond Init: systemd
“systemd is a system and session manager for Linux, compatiblewith SysV and LSB init scripts.
systemd provides aggressiveparallelization capabilities, uses socket and D-Bus activation forstarting services, offers on-demand starting of daemons, keeps
track of processes using Linux cgroups, supports snapshotting andrestoring of the system state, maintains mount and automount
points and implements an elaborate transactionaldependency-based service control logic. It can work as a drop-in
replacement for sysvinit.”
Lennart Poettering Beyond Init: systemd
“systemd is a system and session manager for Linux, compatiblewith SysV and LSB init scripts. systemd provides aggressive
parallelization capabilities,
uses socket and D-Bus activation forstarting services, offers on-demand starting of daemons, keeps
track of processes using Linux cgroups, supports snapshotting andrestoring of the system state, maintains mount and automount
points and implements an elaborate transactionaldependency-based service control logic. It can work as a drop-in
replacement for sysvinit.”
Lennart Poettering Beyond Init: systemd
“systemd is a system and session manager for Linux, compatiblewith SysV and LSB init scripts. systemd provides aggressive
parallelization capabilities, uses socket and D-Bus activation forstarting services,
offers on-demand starting of daemons, keepstrack of processes using Linux cgroups, supports snapshotting and
restoring of the system state, maintains mount and automountpoints and implements an elaborate transactional
dependency-based service control logic. It can work as a drop-inreplacement for sysvinit.”
Lennart Poettering Beyond Init: systemd
“systemd is a system and session manager for Linux, compatiblewith SysV and LSB init scripts. systemd provides aggressive
parallelization capabilities, uses socket and D-Bus activation forstarting services, offers on-demand starting of daemons,
keepstrack of processes using Linux cgroups, supports snapshotting and
restoring of the system state, maintains mount and automountpoints and implements an elaborate transactional
dependency-based service control logic. It can work as a drop-inreplacement for sysvinit.”
Lennart Poettering Beyond Init: systemd
“systemd is a system and session manager for Linux, compatiblewith SysV and LSB init scripts. systemd provides aggressive
parallelization capabilities, uses socket and D-Bus activation forstarting services, offers on-demand starting of daemons, keeps
track of processes using Linux cgroups,
supports snapshotting andrestoring of the system state, maintains mount and automount
points and implements an elaborate transactionaldependency-based service control logic. It can work as a drop-in
replacement for sysvinit.”
Lennart Poettering Beyond Init: systemd
“systemd is a system and session manager for Linux, compatiblewith SysV and LSB init scripts. systemd provides aggressive
parallelization capabilities, uses socket and D-Bus activation forstarting services, offers on-demand starting of daemons, keeps
track of processes using Linux cgroups, supports snapshotting andrestoring of the system state,
maintains mount and automountpoints and implements an elaborate transactional
dependency-based service control logic. It can work as a drop-inreplacement for sysvinit.”
Lennart Poettering Beyond Init: systemd
“systemd is a system and session manager for Linux, compatiblewith SysV and LSB init scripts. systemd provides aggressive
parallelization capabilities, uses socket and D-Bus activation forstarting services, offers on-demand starting of daemons, keeps
track of processes using Linux cgroups, supports snapshotting andrestoring of the system state, maintains mount and automount
points
and implements an elaborate transactionaldependency-based service control logic. It can work as a drop-in
replacement for sysvinit.”
Lennart Poettering Beyond Init: systemd
“systemd is a system and session manager for Linux, compatiblewith SysV and LSB init scripts. systemd provides aggressive
parallelization capabilities, uses socket and D-Bus activation forstarting services, offers on-demand starting of daemons, keeps
track of processes using Linux cgroups, supports snapshotting andrestoring of the system state, maintains mount and automount
points and implements an elaborate transactionaldependency-based service control logic.
It can work as a drop-inreplacement for sysvinit.”
Lennart Poettering Beyond Init: systemd
“systemd is a system and session manager for Linux, compatiblewith SysV and LSB init scripts. systemd provides aggressive
parallelization capabilities, uses socket and D-Bus activation forstarting services, offers on-demand starting of daemons, keeps
track of processes using Linux cgroups, supports snapshotting andrestoring of the system state, maintains mount and automount
points and implements an elaborate transactionaldependency-based service control logic. It can work as a drop-in
replacement for sysvinit.”
Lennart Poettering Beyond Init: systemd
init(8)
Lennart Poettering Beyond Init: systemd
Parallelization
Lennart Poettering Beyond Init: systemd
Lennart Poettering Beyond Init: systemd
Socket-Based Activation
The kernel orders and buffers requests for us!
Implicit dependencies!
Patching daemons
Lennart Poettering Beyond Init: systemd
Socket-Based Activation
The kernel orders and buffers requests for us!
Implicit dependencies!
Patching daemons
Lennart Poettering Beyond Init: systemd
Socket-Based Activation
The kernel orders and buffers requests for us!
Implicit dependencies!
Patching daemons
Lennart Poettering Beyond Init: systemd
Socket-Based Activation
The kernel orders and buffers requests for us!
Implicit dependencies!
Patching daemons
Lennart Poettering Beyond Init: systemd
Bus-Based Activation
Lennart Poettering Beyond Init: systemd
Starting Less: On-Demand Loading
Lennart Poettering Beyond Init: systemd
Parallelizing File System Jobs
autofs!
Lennart Poettering Beyond Init: systemd
Parallelizing File System Jobs
autofs!
Lennart Poettering Beyond Init: systemd
Shell is evil
Move to systemd, daemons, kernel, udev, . . .
Provide proper debugging facilities
Lennart Poettering Beyond Init: systemd
Shell is evil
Move to systemd, daemons, kernel, udev, . . .
Provide proper debugging facilities
Lennart Poettering Beyond Init: systemd
Shell is evil
Move to systemd, daemons, kernel, udev, . . .
Provide proper debugging facilities
Lennart Poettering Beyond Init: systemd
The best babysitter.
Control Groups!
Lennart Poettering Beyond Init: systemd
The best babysitter.
Control Groups!
Lennart Poettering Beyond Init: systemd
The best babysitter II
Environment, resource limits, working directory, chroot(), umask,OOM adjustment, nice level, IO priority and class, CPU schedulerpriority and policy/reset-on-fork, CPU affinity, timer slack, stdio tosyslog/tty/null/kmsg, uid, gid, supplementary groups, file system
namespacing (r/o file systems, inaccessible systems, mountpropagation, private /tmp), capabilities (inherited set, bounding
set, secure bits), . . .
Lennart Poettering Beyond Init: systemd
The best babysitter II
Environment, resource limits, working directory, chroot(), umask,OOM adjustment, nice level, IO priority and class, CPU schedulerpriority and policy/reset-on-fork, CPU affinity, timer slack, stdio tosyslog/tty/null/kmsg, uid, gid, supplementary groups, file system
namespacing (r/o file systems, inaccessible systems, mountpropagation, private /tmp), capabilities (inherited set, bounding
set, secure bits), . . .
Lennart Poettering Beyond Init: systemd
Unit types: service, socket, device, mount, automount, target,snapshot, timer, swap, path
Lennart Poettering Beyond Init: systemd
Don’t reinvent the wheel:
Read SysV/LSB init script headers, read /etc/fstab, supporttraditional inetd modes, support /dev/initctl, utmp, wtmp,
support double-fork()ing daemons.
.desktop files.
Lennart Poettering Beyond Init: systemd
Don’t reinvent the wheel:
Read SysV/LSB init script headers, read /etc/fstab, supporttraditional inetd modes, support /dev/initctl, utmp, wtmp,
support double-fork()ing daemons.
.desktop files.
Lennart Poettering Beyond Init: systemd
Don’t reinvent the wheel:
Read SysV/LSB init script headers, read /etc/fstab, supporttraditional inetd modes, support /dev/initctl, utmp, wtmp,
support double-fork()ing daemons.
.desktop files.
Lennart Poettering Beyond Init: systemd
Snapshots
Lennart Poettering Beyond Init: systemd
Transaction System
Lennart Poettering Beyond Init: systemd
D-Bus!
Lennart Poettering Beyond Init: systemd
systemadm
Lennart Poettering Beyond Init: systemd
systemd as basic OS building block
systemd for cross-distribution standardization
Lennart Poettering Beyond Init: systemd
systemd as basic OS building block
systemd for cross-distribution standardization
Lennart Poettering Beyond Init: systemd
systemd in the distributions
Lennart Poettering Beyond Init: systemd
Future: managing sessions
Lennart Poettering Beyond Init: systemd
Say No! to Copyright Assignment.
Lennart Poettering Beyond Init: systemd
That’s all, folks.
Any questions?
Lennart Poettering Beyond Init: systemd
That’s all, folks.
Any questions?
Lennart Poettering Beyond Init: systemd
systemd
http://www.freedesktop.org/wiki/Software/systemd
http://0pointer.de/blog/projects/systemd
git://anongit.freedesktop.org/systemd
#systemd on irc.freenode.org
Lennart Poettering Beyond Init: systemd
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