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howtos:general_admin:openrc [2018/11/07 09:26 (UTC)]
aaditya [Migrating from /etc/init.d to /etc/openrc/init.d] need to handle local.d too
howtos:general_admin:openrc [2019/09/05 10:46 (UTC)] (current)
aaditya [Enabling some services] alsasound can go in boot runlevel
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 OpenRC is a dependency based service management system. It works with the system provided init program, normally ///​sbin/​init//​. OpenRC is a dependency based service management system. It works with the system provided init program, normally ///​sbin/​init//​.
  
-====== Features ​======+===== Features =====
  
 OpenRC provides a number of features like hardware initiated initscript run and cgroups support, without requiring large layout changes. OpenRC provides a number of features like hardware initiated initscript run and cgroups support, without requiring large layout changes.
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 ====== Installation ====== ====== Installation ======
  
-===== Pre installation =====+Two [[slackware:​slackbuild_scripts|Slackbuilds]] are available, [[http://​slackbuilds.org/​repository/​14.2/​system/​openrc/​|openrc]],​ which contains the OpenRC init system, and [[http://​slackbuilds.org/​repository/​14.2/​system/​openrc-services/​|openrc-services]],​ which contains various services for use with OpenRC.
  
-The /etc/init.d directory (a symlink to ///​etc/​rc.d/​init.d//​) will need to be moved: +===== Post installation =====
-  # mv /etc/init.d /​etc/​init.d-bkp+
  
-===== Installing =====+After installation,​ some steps are needed to boot with OpenRC.
  
-Two [[slackware:​slackbuild_scripts|Slackbuilds]] are available, [[http://​slackbuilds.org/​repository/​14.2/​system/​openrc/​|openrc]],​ which contains ​the OpenRC init system, and [[http://​slackbuilds.org/​repository/​14.2/​system/​openrc-services/​|openrc-services]],​ which contains various services for use with OpenRC.+=== Setup the agetty ​services ​===
  
-===== Post installation =====+  # main tty 
 +  ln -s /​etc/​openrc/​init.d/​agetty /​etc/​openrc/​init.d/​agetty.tty1 
 +  /​sbin/​rc-update add agetty.tty1 default 
 +     
 +  cp /​etc/​openrc/​conf.d/​agetty /​etc/​openrc/​conf.d/​agetty.tty1 
 +  echo '​agetty_options="​--noclear"'​ >> /​etc/​openrc/​conf.d/​agetty.tty1 
 +   
 +  # additional ttys 
 +  for i in {2..6}; do 
 +    ln -s /​etc/​openrc/​init.d/​agetty /​etc/​openrc/​init.d/​agetty.tty${i} 
 +    /​sbin/​rc-update add agetty.tty${i} default 
 +  done 
 +   
 +  # serial tty (for servers) 
 +  ln -s /​etc/​openrc/​init.d/​agetty /​etc/​openrc/​init.d/​agetty.ttyS0 
 +  /​sbin/​rc-update add agetty.ttyS0 default 
 +   
 +  cp /​etc/​openrc/​conf.d/​agetty /​etc/​openrc/​conf.d/​agetty.ttyS0 
 +  echo '​agetty_options="​--noclear"'​ >> /​etc/​openrc/​conf.d/​agetty.ttyS0 
 + 
 +=== Update boot parameters ​=== 
 + 
 +Add the following to your boot parameters (via ///​etc/​lilo.conf//​ for lilo or ///​etc/​default/​grub//​ for grub): 
 +  init=/​sbin/​openrc-init 
 + 
 +Regenerate boot configuration ('lilo -v' or '​grub-mkconfig -o /​boot/​grub/​grub.cfg'​).
  
-After installing, ///​etc/​inittab//​ will need to be replaced. The old one can be backed up: +=== Enable boot logging ===
-  # cp /​etc/​inittab /​etc/​inittab.sysvinit +
-  # mv /​etc/​inittab.new /​etc/​inittab+
  
-The main configuration file for OpenRC is ///​etc/​rc.conf//,​ and contains various options.+The main configuration file for OpenRC is ///etc/openrc/rc.conf//, and contains various options.
  
 A common option that could be changed is to enable boot logging by setting ''​rc_logger="​YES"'',​ this way any errors encountered via booting could be logged and examined later (default log location is ///​var/​log/​rc.log//​). A common option that could be changed is to enable boot logging by setting ''​rc_logger="​YES"'',​ this way any errors encountered via booting could be logged and examined later (default log location is ///​var/​log/​rc.log//​).
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 ===== On reboot ===== ===== On reboot =====
  
-After installing openrc and openrc-services,​ on rebooting one is booted to a command line with only the bare minimum of services enabled.+On rebootingone is booted to a command line with only the bare minimum of services enabled.
  
 It may show a warning about deprecated support for ///​etc/​mtab//​ as a file, and how to correct it: It may show a warning about deprecated support for ///​etc/​mtab//​ as a file, and how to correct it:
-  # cp /etc/mtab /etc/mtab.bak+  # cp /etc/mtab /etc/mtab.bkp
   # ln -snf /​proc/​self/​mounts /etc/mtab   # ln -snf /​proc/​self/​mounts /etc/mtab
   ​   ​
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   # rc-update add sysklogd default   # rc-update add sysklogd default
   # rc-update add dcron default   # rc-update add dcron default
-  # rc-update add alsasound ​default ​ # for desktop+  # rc-update add alsasound ​boot  # for desktop
   # rc-update add consolekit default ​ # for desktop   # rc-update add consolekit default ​ # for desktop
   # rc-update add sshd default ​ # for server   # rc-update add sshd default ​ # for server
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 If using wifi with laptops the **NetworkManager** or **wicd** service could be enabled. The combination of dhcpcd and wpa_supplicant (along with a frontend like wpa_gui or wpa_cli) could also be used as a lightweight alternative. If using wifi with laptops the **NetworkManager** or **wicd** service could be enabled. The combination of dhcpcd and wpa_supplicant (along with a frontend like wpa_gui or wpa_cli) could also be used as a lightweight alternative.
  
-A static network can be configured by editing ///​etc/​conf.d/​network//​.+A static network can be configured by editing ///etc/openrc/​conf.d/​network//​.
  
 === Display manager === === Display manager ===
  
-To boot to a graphical display manager, ///​etc/​conf.d/​xdm//​ can be edited to specify the display manager, and the xdm service could be enabled:+To boot to a graphical display manager, ///etc/openrc/​conf.d/​xdm//​ can be edited to specify the display manager, and the xdm service could be enabled:
  
   # rc-update add xdm default   # rc-update add xdm default
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 ====== Configuration ====== ====== Configuration ======
  
-OpenRC services are present in the ///​etc/​init.d//​ folder, and corresponding configuration files are present in ///​etc/​conf.d//​+OpenRC services are present in the ///etc/openrc/init.d// folder, and corresponding configuration files are present in ///etc/openrc/conf.d//
  
 Some common configuration files include: Some common configuration files include:
  
-  /​etc/​conf.d/​modules ​   # modules to be loaded at boot +  /etc/openrc/​conf.d/​modules ​   # modules to be loaded at boot 
-  /​etc/​conf.d/​hostname ​  # hostname of the system +  /etc/openrc/​conf.d/​hostname ​  # hostname of the system 
-  /​etc/​conf.d/​keymaps ​   # console keymap+  /etc/openrc/​conf.d/​keymaps ​   # console keymap
  
-===== Services ​=====+===== Service management ​=====
  
 Services can be started/​stopped/​restarted as: Services can be started/​stopped/​restarted as:
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   # rc-service sshd start   # rc-service sshd start
  
-====== openrc-init ======+   
 +===== Shutdown/​reboot ​=====
  
-Since version ​**0.25**, openrc provides ​//openrc-init// which can be used to boot the system.+To shutdown or reboot, one will need to use **openrc-shutdown**. To shutdown from a desktop environment using ConsoleKit2check out this [[https://github.com/ConsoleKit2/ConsoleKit2/​pull/​113|PR]].
  
-This allows switching between OpenRC and other init systems, for example sysvinit, just by changing boot parameters.+====== Troubleshooting ======
  
-To use it,+At the moment only a subset of the included services have been testedso some of them may not run correctly.
  
-=== Revert inittab changes done ===+If some service does not work, try the system provided one in ///​etc/​rc.d//​ (if available).
  
-  cp /​etc/​inittab /​etc/​inittab-openrc.bkp +==== mysqld ====
-  mv /​etc/​inittab.sysvinit /​etc/​inittab +
-   +
-=== Setup the agetty services ​===+
  
-  # main tty +Try adding the following lines to ///etc/my.cnf//
-  ln -s /etc/init.d/​agetty ​/etc/init.d/agetty.tty1 +
-  ​/sbin/​rc-update add agetty.tty1 default +
-     +
-  cp /​etc/​conf.d/​agetty /​etc/​conf.d/​agetty.tty1 +
-  echo '​agetty_options="​--noclear"'​ >> /​etc/​conf.d/​agetty.tty1 +
-   +
-  # additional ttys +
-  for i in {2..6}; do +
-    ln -s /​etc/​init.d/​agetty /​etc/​init.d/​agetty.tty${i} +
-    /​sbin/​rc-update add agetty.tty${i} default +
-  done +
-   +
-  # serial tty (for servers) +
-  ln -s /​etc/​init.d/​agetty /​etc/​init.d/​agetty.ttyS0 +
-  /​sbin/​rc-update add agetty.ttyS0 default +
-   +
-  cp /​etc/​conf.d/​agetty /​etc/​conf.d/​agetty.ttyS0 +
-  echo '​agetty_options="​--noclear"'​ >> /​etc/​conf.d/​agetty.ttyS0+
  
-=== Update boot parameters ===+  [mysqld] 
 +  user mysql 
 +  basedir ​/usr 
 +  datadir ​/​var/​lib/​mysql 
 +  pid-file ​/​run/​mysql/​mysql.pid 
 +  socket ​/​var/​run/​mysql/​mysql.sock
  
-Add the following to your boot parameters (via ///​etc/​lilo.conf//​ for lilo or ///​etc/​default/​grub//​ for grub): +==== Dealing with crashed services ====
-  init=/​sbin/​openrc-init+
  
-=== Shutdown/reboot ===+Sometimes openrc reports a service'​s status as "​crashed"​. The process may have died or its pid file disappeared/changed.
  
-To shutdown or reboot, one will need to use **openrc-shutdown**. To shutdown from a desktop environment using ConsoleKit2check out this [[https://github.com/ConsoleKit2/ConsoleKit2/​pull/​113|PR]].+If one tries to start a crashed service`rc-service` reports: 
 + 
 +  * WARNING: <​service>​ has already been started 
 + 
 +So one tries to stop it before starting again. 
 + 
 +However in some situations, the service does not stop. This leads to a deadlock where one can neither stop the service nor start it. For such cases: 
 + 
 +  # rc-service <​service>​ zap 
 +  ​Manually resetting <​service>​ to stopped state 
 + 
 +**zap** resets the service state, allowing us to start it again. 
 + 
 +===== openrc-init ===== 
 + 
 +Since version ​**0.25**openrc provides ​//openrc-init// which can be used to boot the system. 
 + 
 +This allows switching between OpenRC and other init systems, for example sysvinit, just by changing boot parameters.
  
 For more info, check out the [[https://​wiki.gentoo.org/​wiki/​OpenRC#​openrc-init|Gentoo wiki]]. For more info, check out the [[https://​wiki.gentoo.org/​wiki/​OpenRC#​openrc-init|Gentoo wiki]].
  
-====== Migrating from /etc/init.d to /​etc/​openrc/​init.d ​======+===== Migrating from /etc/init.d to /​etc/​openrc/​init.d =====
  
-OpenRC 0.39+, as //​**planned**//​ to shipped via SBo, changes the service and configuration directory to ///​etc/​openrc//​ instead of ///etc//.+OpenRC 0.39+, as shipped via SBo, changes the service and configuration directory to ///​etc/​openrc//​ instead of ///etc//.
  
 This is being done to maintain greater compatibility with a vanilla Slackware install. This is being done to maintain greater compatibility with a vanilla Slackware install.
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     fi     fi
   done   done
 +  # main config file
 +  diff -Nupr /​etc/​rc.conf /​etc/​openrc/​rc.conf
   ​   ​
   # check local.d changes   # check local.d changes
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 Config changes found above can be updated by hand or copy pasted in new location. Config changes found above can be updated by hand or copy pasted in new location.
  
-=== 3. Reboot ​and check ===+=== 3. Check and reboot ​===
  
-After rebooting ​and checking ​whether things are working expected, old files and folders can be renamed (or removed).+Verify if ''​rc-status''​ is showing all services (it may show them as stopped). 
 + 
 +Reboot ​and check whether things are working expected, ​make changes as necessary. 
 + 
 +The old files and folders can be renamed (or removed).
  
   mv /etc/init.d /​etc/​init.d-openrc-bkp   mv /etc/init.d /​etc/​init.d-openrc-bkp
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   mv /​etc/​init.d-bkp /etc/init.d   mv /​etc/​init.d-bkp /etc/init.d
- 
-====== Troubleshooting ====== 
- 
-At the moment only a subset of the included services have been tested, so some of them may not run correctly. 
- 
-If some service does not work, try the system provided one in ///​etc/​rc.d//​ (if available). 
- 
-==== mysqld ==== 
- 
-Try adding the following lines to ///​etc/​my.cnf//​ 
- 
-  [mysqld] 
-  user = mysql 
-  basedir = /usr 
-  datadir = /​var/​lib/​mysql 
-  pid-file = /​run/​mysql/​mysql.pid 
-  socket = /​var/​run/​mysql/​mysql.sock 
- 
-==== Dealing with crashed services ==== 
- 
-Sometimes openrc reports a service'​s status as "​crashed"​. The process may have died or its pid file disappeared/​changed. 
- 
-If one tries to start a crashed service, `rc-service` reports: 
- 
-  * WARNING: <​service>​ has already been started 
- 
-So one tries to stop it before starting again. 
- 
-However in some situations, the service does not stop. This leads to a deadlock where one can neither stop the service nor start it. For such cases: 
- 
-  # rc-service <​service>​ zap 
-  * Manually resetting <​service>​ to stopped state 
- 
-**zap** resets the service state, allowing us to start it again. 
- 
-==== Errors while booting ==== 
- 
-After installing or updating the **openrc-services** packages, one may get errors like: 
- 
-   * checkpath: owner `netdata:​netdata'​ not found 
- 
-This is because **openrc-services** contains services for some packages not found in the base Slackware install, but present on SBo. 
- 
-These usually go away on their own after the openrc cache is updated. 
  
 ====== See Also ====== ====== See Also ======

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