Difference between revisions of "OpenRC, an alternative to systemd"
no edit summary
imported>Aaditya (Redirected page to Using OpenRC, an alternative to systemd) |
imported>Aaditya |
||
| Line 1: | Line 1: | ||
[http://www.gentoo.org/proj/en/base/openrc/ OpenRC] is an init system maintained by the Gentoo developers. | |||
OpenRC is a dependency based init system that works with the system provided init program, normally sysvinit. It is not a replacement for sysvinit. | |||
It can be used as an alternative to [http://www.freedesktop.org/wiki/Software/systemd/ systemd], for users that like more control over their system and do not want all the features that systemd provides and automatically activates. | |||
== Installation == | |||
OpenRC is currently available from the [https://aur.archlinux.org/packages/?O=0&K=openrc AUR], and from a binary repository curtsy Archbang and artoo. | |||
To use the binary repos, add the following near the end of the ''/etc/pacman.conf'' file: | |||
[openrc] | |||
SigLevel = Optional TrustAll | |||
Server = http://archbang.org/repos/$repo/$arch | |||
[aur-nosystemd] | |||
SigLevel = Optional TrustAll | |||
Server = http://archbang.org/repos/$repo/$arch | |||
And then do '''sudo pacman -Syu''' to synchronise the reposotories. | |||
The main package to install is ''openrc-base''. It installs a binary init sysvinit (sysvinit), and the OpenRC base scripts and configuration. | |||
To install the ''openrc-base'' package, use: | |||
sudo pacman -S openrc-base | |||
This package conflicts with ''systemd-sysvcompat'', which will be removed. The output looks like: | |||
sudo pacman -S openrc-base | |||
resolving dependencies... | |||
looking for inter-conflicts... | |||
:: openrc-base and systemd-sysvcompat are in conflict. Remove systemd-sysvcompat? [y/N] y | |||
Packages (3): systemd-sysvcompat-212-3 [removal] sysvinit-2.88-15 | |||
openrc-base-0.12.4-12 | |||
Total Download Size: 0.24 MiB | |||
Total Installed Size: 0.96 MiB | |||
Net Upgrade Size: 0.95 MiB | |||
:: Proceed with installation? [Y/n] | |||
After installing the ''openrc-base'' package, OpenRC should boot by default instead of systemd. Note that it will boot to a command line, as the service for a graphical display manager has not yet been installed. | |||
On installing the ''openrc-base'' package, you may get messages like: | |||
run 'rc-update add cronie default' | |||
run 'rc-update add dhcpcd default' | |||
Running these commands adds the services to the specified runlevels. For example if you run: | |||
sudo rc-update add cronie default | |||
Then the cronie service would be added to the default runelevel and would automatically be started at boot. | |||
=== Additional packages === | |||
==== Display Manager ==== | |||
To boot to a graphical display manager, install the '''openrc-displaymanager''' package, and edit the ''/etc/conf.d/xdm'' file to specify your display manager. For example, to use '''lightdm''', I changed the line | |||
DISPLAYMANAGER="xdm" | |||
to | |||
DISPLAYMANAGER="lightdm" | |||
''Note:'' | |||
''lightdm'' and a ''lightdm-greeter'' should be installed and configured to use lightdm as display manager. | |||
An alternative to ''lightdm'' that I find simpler is [https://wiki.archlinux.org/index.php/LXDM LXDM]. However the version in the repos does not automatically start a ck-session on login; alternative [https://aur.archlinux.org/packages/lxdm-consolekit/ lxdm-consolekit] from the [[AUR]] can be used. | |||
==== Audio (ALSA) ==== | |||
The '''alsa-utils-openrc''' package can be installed. After installing it run: | |||
sudo rc-update add alsasound default | |||
to automatically start Alsa at boot. | |||
==== Network Manager ==== | |||
By default ''dhcpcd'' is installed. However if you use Wifi to connect, or need a graphical network applet, then '''networkmanager-openrc''' can be installed. | |||
The ''networkmanager-openrc'' replaces the normal networkmanager package in the repos. Also, it requires ''consolekit'' and ''polkit-consolekit'', which replaces the normal polkit from the repos. | |||
==== Consolekit ==== | |||
You may also wish to install '''consolekit-openrc''', which supports multi-user setups, mounting of partitions by unauthorised users, etc. See the [https://wiki.gentoo.org/wiki/ConsoleKit Gentoo-Wiki] for more details. | |||
Only caveat of installing consolekit is that it requires ''polkit-consolekit'', which conflicts with the normal polkit; so if you boot to systemd you wont be able to mount partitions if you are not in the storage group. | |||
However using the command line, or as root user, one can mount any partition or perform most functions that are made available to the normal user via polkit. See the [https://wiki.archlinux.org/index.php/Polkit Arch-wiki] for more details. | |||
==== Others ==== | |||
For acpi support '''acpid-openrc''' can be installed and enabled. | |||
For running the ''ps'' command, the '''procps-ng-nosystemd''' package can be installed. | |||
To suspend and hibernate via the command line, '''pm-utils''' can be installed. You may also need the '''upower-nosystemd-pm-utils''' package if suspend and hibernate does not work. Also see the [[Using_OpenRC,_an_alternative_to_systemd#Troubleshooting | troubleshooting]] section for enabling swap. | |||
== Troubleshooting == | |||
When booting, you may get errors like: | |||
tmpfiles: ignoring invalid entry on line 32 of `/usr/lib/tmpfiles.d//legacy.conf' | |||
tmpfiles: ignoring invalid entry on line 33 of `/usr/lib/tmpfiles.d//legacy.conf' | |||
tmpfiles: ignoring invalid entry on line 34 of `/usr/lib/tmpfiles.d//legacy.conf' | |||
tmpfiles: ignoring invalid entry on line 11 of `/usr/lib/tmpfiles.d//systemd-nologin.conf' | |||
tmpfiles: ignoring invalid entry on line 18 of `/usr/lib/tmpfiles.d//x11.conf' | |||
To correct, I removed the lines referenced in the above files. These errors have been fixed by the developers on [https://github.com/OpenRC/openrc/issues/17 github], and should be available in the next release. | |||
The boot logs for OpenRC are stored in ''/var/log/rc.log'' | |||
If you were using systemd on a '''GPT''' partitioned hard disk, then you may need to enable swap via ''/etc/fstab''. This is so because systemd handled swap automatically on GPT partitions, and gave error if it was mounted via fstab. | |||
I added the following entry to my ''/etc/fstab'' | |||
# /dev/sda10 | |||
UUID=0c3e9434-bc5c-461c-a5e4-4e9fe5f9a149 swap swap sw 0 0 | |||
Also, systemd used to set a ''tmpfs'' by default; to set it manually via ''/etc/fstab'', I added the following lines: | |||
tmpfs /tmp tmpfs nodev,nosuid 0 0 | |||
See the [https://wiki.archlinux.org/index.php/Fstab#tmpfs Arch Wiki] for more details. | |||
== Further Reading == | |||
[https://wiki.archlinux.org/index.php/Openrc The Arch Wiki] | |||
[http://blog.notfoss.com/posts/openrc-on-arch-linux/ OpenRC on Arch Linux] | |||
[http://abchk1234.wordpress.com/2014/06/03/using-openrc-on-arch-archbang-manjaro-linux/ Using OpenRC on Arch / Archbang / Manjaro Linux] | |||
== Support == | |||
Following is a link to this page's forum counterpart where you can post any related feedback: [https://forum.manjaro.org/index.php?topic=14080.0] | |||
[[Category:Contents Page]] | |||