[2024-feb-29] Sad news: Eric Layton aka Nocturnal Slacker aka vtel57 passed away on Feb 26th, shortly after hospitalization. He was one of our Wiki's most prominent admins. He will be missed.

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howtos:general_admin:openrc [2018/09/23 14:45 (UTC)] – add section for using openrc-init aadityahowtos:general_admin:openrc [2018/11/07 09:46 (UTC)] – [On reboot] change backup file name for consistency aaditya
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 ====== OpenRC ====== ====== OpenRC ======
  
-OpenRC is a dependency based init system that works with the system provided init program, normally ///sbin/init// (which is svsvinit in Slackware). It is not a replacement for /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 touted as innovative by recent init systems like systemd or upstart, such as hardware initiated initscript run or cgroups support, without requiring large layout changes to accommodate radically different designs and dependencies.+OpenRC provides a number of features like hardware initiated initscript run and cgroups support, without requiring large layout changes.
  
 ====== Installation ====== ====== Installation ======
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 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
      
Line 136: Line 136:
 ====== openrc-init ====== ====== openrc-init ======
  
-Since version **0.25**, openrc provides //openrc-init// which can be used to directly boot the system.+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.
  
 To use it, To use it,
  
-* Revert inittab changes done+=== Revert inittab changes done ===
  
-  cp /etc/inittab /etc/inittab.bkp+  cp /etc/inittab /etc/inittab-openrc.bkp
   mv /etc/inittab.sysvinit /etc/inittab   mv /etc/inittab.sysvinit /etc/inittab
      
-* Enable the agetty services+=== Setup the agetty services ===
  
-  for i in {1..6}; do+  # main tty 
 +  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${i}     ln -s /etc/init.d/agetty /etc/init.d/agetty.tty${i}
     /sbin/rc-update add agetty.tty${i} default     /sbin/rc-update add agetty.tty${i} default
   done   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 ===
  
-* Add the following to your bootloader options:+Add the following to your boot parameters (via ///etc/lilo.conf// for lilo or ///etc/default/grub// for grub):
   init=/sbin/openrc-init   init=/sbin/openrc-init
  
-Note- To shutdown or reboot, one will need to use **openrc-shutdown**.+=== Shutdown/reboot === 
 + 
 +To shutdown or reboot, one will need to use **openrc-shutdown**. To shutdown from a desktop environment using ConsoleKit2, check out this [[https://github.com/ConsoleKit2/ConsoleKit2/pull/113|PR]].
  
 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 ======
 +
 +OpenRC 0.39+, as //**planned**// to 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.
 +
 +Existing services will need to be migrated, details below on how it can be done.
 +
 +=== 1. Install openrc-0.39.2 and openrc-services-20181107 ===
 +
 +These packages ship the configuration and service files in ///etc/openrc//.
 +
 +=== 2. Migrate existing services ===
 +
 +This involves 4 steps:
 +
 +  # migrate existing services
 +  for service in /etc/init.d/*; do
 +    svcname=$(basename "$service")
 +    if [ ! -e "/etc/openrc/init.d/${svcname}" ]; then
 +      if [ -f "/etc/init.d/${svcname}" ] && grep -q openrc "/etc/init.d/${svcname}"; then
 +        cp -v "/etc/init.d/${svcname}" "/etc/openrc/init.d/${svcname}"
 +      elif [ -L "/etc/init.d/${svcname}" ]; then
 +        # check if symlink is of a service
 +        service_target=$(readlink -f "$service")
 +        service_target_name=$(basename "$service_target")
 +        if [ $(dirname "$service_target") = "/etc/init.d" ]; then
 +          ln -sv "/etc/openrc/init.d/${service_target_name}" "/etc/openrc/init.d/${svcname}"
 +        fi
 +      fi
 +    fi
 +  done
 +  
 +  # enable existing services
 +  for runlevel in /etc/runlevels/*; do
 +    for service in ${runlevel}/*; do
 +      svcname=$(basename "$service")
 +      rvlname=$(basename "$runlevel")
 +      if [ ! -e /etc/openrc/runlevels/${rvlname}/${svcname} ] && [ -e /etc/openrc/init.d/${svcname} ]; then
 +        ln -sv /etc/openrc/init.d/${svcname} /etc/openrc/runlevels/${rvlname}/${svcname}
 +      fi
 +    done
 +  done
 +  
 +  # check config changes
 +  for file in /etc/conf.d/*; do
 +    filename=$(basename "$file")
 +    extension="${filename##*.}"
 +    if [ "$extension" = orig ] || [ "$extension" == new ]; then
 +      continue  # dont need to check extra
 +    fi
 +    if [ -e "/etc/conf.d/${filename}" ] && [ -e "/etc/openrc/conf.d/${filename}" ]; then
 +      diff -Nupr "/etc/conf.d/${filename}" "/etc/openrc/conf.d/${filename}"
 +    fi
 +  done
 +  
 +  # check local.d changes
 +  for file in /etc/local.d/*; do
 +    filename=$(basename "$file")
 +    if [ ! -e "/etc/openrc/local.d/${filename}" ]; then
 +      cp -v "/etc/local.d/${filename}" "/etc/openrc/local.d/${filename}"
 +    elif [ -e "/etc/local.d/${filename}" ] && [ -e "/etc/openrc/local.d/${filename}" ]; then
 +      # show changes
 +      diff -Nupr "/etc/local.d/${filename}" "/etc/openrc/local.d/${filename}"
 +    fi
 +  done
 +
 +Config changes found above can be updated by hand or copy pasted in new location.
 +
 +=== 3. Check and reboot ===
 +
 +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/conf.d /etc/conf.d-openrc-bkp
 +  mv /etc/local.d /etc/local.d-openrc-bkp
 +  mv /etc/runlevels /etc/runlevels-openrc-bkp
 +  mv /etc/rc.conf /etc/rc.conf-openrc.bkp
 +
 +Finally, any changes done to the default Slackware system can be reverted:
 +
 +  mv /etc/init.d-bkp /etc/init.d
  
 ====== Troubleshooting ====== ====== Troubleshooting ======
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 ==== Errors while booting ==== ==== Errors while booting ====
  
-After installing or updating the **openrc-services** packages, you may get errors like:+After installing or updating the **openrc-services** packages, one may get errors like:
  
    * checkpath: owner `netdata:netdata' not found    * checkpath: owner `netdata:netdata' not found

Trace:

howtos:general_admin:openrc ()