initscript.py

   1 import os, os.path
   2 import tools
   3
   4 import logger
   5
   6 class Initscript:
   7
   8     def __init__ (self, name):
   9         self.name=name
  10         self.initscript = ''
  11
  12     def configure (self, rec):
  13 #        logger.log("Initscript.configure")
  14         new_initscript = rec['initscript']
  15         if new_initscript != self.initscript:
  16             self.initscript = new_initscript
  17             # not used anymore, we always check against the installed script
  18             #self.initscriptchanged = True
  19             self.refresh_slice_vinit()
  20
  21     def install_and_enable_vinit (self):
  22         # the fact that systemd attempts to run old-style services
  23         # says we should do either or or the other and not both
  24         # but actually if that was true we could just do it for init and be fine
  25         # which is not what we've seen starting with f18
  26         # so for now let's do it for both systems unconditionnally
  27         self.install_and_enable_vinit_for_init ()
  28         self.install_and_enable_vinit_for_systemd ()
  29
  30     # unconditionnally install and enable the generic vinit script
  31     # mimicking chkconfig for enabling the generic vinit script
  32     # this is hardwired for runlevel 3
  33     def install_and_enable_vinit_for_init (self):
  34         "suitable for init-based VMs"
  35         vinit_source="/usr/share/NodeManager/sliver-initscripts/vinit"
  36         vinit_script="/vservers/%s/etc/rc.d/init.d/vinit"%self.name
  37         enable_link="/vservers/%s/etc/rc.d/rc3.d/S99vinit"%self.name
  38         enable_target="../init.d/vinit"
  39         # install in sliver
  40         code=file(vinit_source).read()
  41         if tools.replace_file_with_string(vinit_script,code,chmod=0755):
  42             logger.log("Initscript: %s: installed generic vinit rc script"%self.name)
  43         # create symlink for runlevel 3
  44         if not os.path.islink(enable_link):
  45             try:
  46                 logger.log("Initscript: %s: creating runlevel3 symlink %s"%(self.name,enable_link))
  47                 os.symlink(enable_target,enable_link)
  48             except:
  49                 logger.log_exc("Initscript: %s: failed to create runlevel3 symlink %s"%enable_link)
  50
  51     # very similar but with systemd unit files - we target 'multi-user' in this context
  52     def install_and_enable_vinit_for_systemd(self):
  53         "suitable for systemd-based VMs"
  54         vinit_source="/usr/share/NodeManager/sliver-systemd/vinit.service"
  55         vinit_unit_file="/vservers/%s/usr/lib/systemd/system/vinit.service"%self.name
  56         enable_link="/vservers/%s/etc/systemd/system/multi-user.target.wants/vinit.service"%self.name
  57         enable_target="/usr/lib/systemd/system/vinit.service"
  58         # install in sliver
  59         code=file(vinit_source).read()
  60         if tools.replace_file_with_string(vinit_unit_file,code,chmod=0755):
  61             logger.log("Initscript: %s: installed vinit.service unit file"%self.name)
  62         # create symlink for enabling this unit
  63         if not os.path.islink(enable_link):
  64             try:
  65                 logger.log("Initscript: %s: creating enabling symlink %s"%(self.name,enable_link))
  66                 os.symlink(enable_target,enable_link)
  67             except:
  68                 logger.log_exc("Initscript: %s: failed to create enabling symlink %s"%enable_link)
  69
  70
  71 #ln -s '/usr/lib/systemd/system/vinit.service' '/etc/systemd/system/multi-user.target.wants/vinit.service'
  72
  73
  74     # install or remove the slice inistscript, as instructed by the initscript tag
  75     def refresh_slice_vinit(self):
  76         code=self.initscript
  77         sliver_initscript="/vservers/%s/etc/rc.d/init.d/vinit.slice"%self.name
  78         if tools.replace_file_with_string(sliver_initscript,code,remove_if_empty=True,chmod=0755):
  79             if code:
  80                 logger.log("Initscript: %s: Installed new initscript in %s"%(self.name,sliver_initscript))
  81                 if self.is_running():
  82                     # Only need to rerun the initscript if the vserver is
  83                     # already running. If the vserver isn't running, then the
  84                     # initscript will automatically be started by
  85                     # /etc/rc.d/vinit when the vserver is started.
  86                     self.rerun_slice_vinit()
  87             else:
  88                 logger.log("Initscript: %s: Removed obsolete initscript %s"%(self.name,sliver_initscript))
  89