initscript.py

   1 # Restarting nm (via systemctl):  Warning: Unit file of created job changed on disk, 'systemctl --system daemon-reload' recommended.
   2
   3 import os, os.path
   4 import tools
   5
   6 import logger
   7
   8 class Initscript:
   9
  10     def __init__ (self, name):
  11         self.name=name
  12         self.initscript = ''
  13
  14     def configure (self, rec):
  15 #        logger.log("Initscript.configure")
  16         new_initscript = rec['initscript']
  17         if new_initscript != self.initscript:
  18             self.initscript = new_initscript
  19             # not used anymore, we always check against the installed script
  20             #self.initscriptchanged = True
  21             self.refresh_slice_vinit()
  22
  23     # unconditionnally install and enable the generic vinit script
  24     # mimicking chkconfig for enabling the generic vinit script
  25     # this is hardwired for runlevel 3
  26     def install_and_enable_vinit (self):
  27         self.install_and_enable_vinit_for_init ()
  28
  29     def install_and_enable_vinit_for_init ():
  30         "suitable for init-based VMs"
  31         vinit_source="/usr/share/NodeManager/sliver-initscripts/vinit"
  32         vinit_script="/vservers/%s/etc/rc.d/init.d/vinit"%self.name
  33         rc3_link="/vservers/%s/etc/rc.d/rc3.d/S99vinit"%self.name
  34         rc3_target="../init.d/vinit"
  35         # install in sliver
  36         code=file(vinit_source).read()
  37         if tools.replace_file_with_string(vinit_script,code,chmod=0755):
  38             logger.log("Initscript: %s: installed generic vinit rc script"%self.name)
  39         # create symlink for runlevel 3
  40         if not os.path.islink(rc3_link):
  41             try:
  42                 logger.log("Initscript: %s: creating runlevel3 symlink %s"%(self.name,rc3_link))
  43                 os.symlink(rc3_target,rc3_link)
  44             except:
  45                 logger.log_exc("Initscript: %s: failed to create runlevel3 symlink %s"%rc3_link)
  46
  47     # install or remove the slice inistscript, as instructed by the initscript tag
  48     def refresh_slice_vinit(self):
  49         code=self.initscript
  50         sliver_initscript="/vservers/%s/etc/rc.d/init.d/vinit.slice"%self.name
  51         if tools.replace_file_with_string(sliver_initscript,code,remove_if_empty=True,chmod=0755):
  52             if code:
  53                 logger.log("Initscript: %s: Installed new initscript in %s"%(self.name,sliver_initscript))
  54                 if self.is_running():
  55                     # Only need to rerun the initscript if the vserver is
  56                     # already running. If the vserver isn't running, then the
  57                     # initscript will automatically be started by
  58                     # /etc/rc.d/vinit when the vserver is started.
  59                     self.rerun_slice_vinit()
  60             else:
  61                 logger.log("Initscript: %s: Removed obsolete initscript %s"%(self.name,sliver_initscript))
  62