def constantlyCheckState( self, globalVars=None ):
if not self.statusFile:
return
loopCmd = 'while true; do %s; sleep 10; done' % self.statusFile
self.stateCommand = ShellCommand( -1, loopCmd, False, False )
self.stateChannel = self.component.host.invokeShell()
command = self.createScreenCmd( self.stateCommand, globalVars )
self.log.debug('Constantly checking file "%s" for Action "%s"' % (self.statusFile, self.name))
screen_name = self.name + '_watchdog'
screenReader = ScreenReader( screen_name, self.stateChannel, self.log,
notifyNewline=self.notifyNewStatusLine, notifyStop=self.screenReaderStopped )
self.screenReaders[ 'show' ].append( screenReader )
screenReader.start()
self.stateChannel.send(command)
def start(self, globalVars=None):
if not self.component or not self.component.host:
raise AttributeError('Host is not set for %s' % str(self))
if not self.isAlive():
self.clearScreenReaders()
if not self.canStart():
self.log.info('Cannot start Action "%s", no commands found' % (self.name))
return
self.log.info('Starting Action "%s". "%d" Commands / "%d" dependencies found' % (self.name, len(self._startCommands), len(self.dependencies)))
if len(self.dependencies):
self.log.info('Action depends on: %s' % list('%s>%s' % (item.component.getName(), item.name) for item in self.dependencies))
for dep in self.dependencies:
dep.start()
for cmd in self._startCommands.values():
channel = self.component.host.invokeShell()
command = self.createScreenCmd( cmd, globalVars )
hideLog = cmd.hideLog
self.startChannels.append(channel)
screen_name = self.name + '_run'
screenReader = ScreenReader( screen_name, channel, self.log, notifyStop=self.screenReaderStopped)
self.screenReaders['hide' if hideLog else 'show'].append(screenReader)
screenReader.start()
self.log.debug('Running start command "%s" by Action "%s"' % (command.replace('\n','\\n'), self.name))
channel.send(command)
self.constantlyCheckState( globalVars )
# if blocking is enabled for this command, wait for the screenreader to quit
if cmd.blocking and screenReader and screenReader.isAlive():
self.log.debug('Command requires blocking. Action "%s" joined the screenReader Thread. Waiting for it to finish' % self.name)
screenReader.join( 5.0 )
# notify EventHandler after all cmds run
if self.isAlive():
EventHistory.actionRun(self, self.component)
return True
else:
self.log.debug('Could not start action "%s", Action still active' % self.name)
return False
def loadParameters( self, component, action ):
host = component.host
channel = host.invokeShell()
channel.send( 'screen -S load_parameters\r\n' )
screenReader = ScreenReader( 'load_parameters', channel, self.log )
screenReader.start()
channel.send( action.parameterFile + ' load\r\n' )
channel.send( 'exit\r\n' )
screenReader.join( 15.0 )
rawData = screenReader.getBuffer()
try:
start = rawData.lower().index( '<configuration>' )
end = rawData.lower().index( '</configuration>' ) + len( '</configuration>' )
return rawData[ start:end ]
except ValueError,e:
raise ValueError( 'Invalid xml format' )
def stop(self, force=False, globalVars=None ):
if not self.component or not self.component.host:
raise AttributeError('Host is not set for %s' % str(self))
if not self.isAlive() and not force:
self.log.debug('Action "%s"::stop skipped because component is not alive')
return False
self.killStateChannel()
if not self.canStop():
self.log.info('Cannot stop Action "%s" (force=%s), no commands found' % (self.name, str(force)))
return
self.log.info('Stopping Action "%s" (force=%s). "%d" Commands found' % (self.name, str(force), len(self._stopCommands)))
for cmd in self._stopCommands.values():
channel = self.component.host.invokeShell()
command = self.createScreenCmd( cmd, globalVars )
hideLog = cmd.hideLog
self.log.debug('Running stop command "%s" by Action "%s"' % (command.replace('\n','\\n'), self.name))
screen_name = self.name + '_stop'
screenReader = ScreenReader( screen_name, channel, self.log, notifyStop=self.screenReaderStopped)
self.screenReaders['hide' if hideLog else 'show'].append(screenReader)
screenReader.start()
channel.send(command)
# if blocking is enabled for this command, wait for the screenreader to quit
if cmd.blocking and screenReader and screenReader.isAlive():
self.log.debug('Command requires blocking. Action "%s" joined the screenReader Thread. Waiting for it to finish' % self.name)
screenReader.join( 5.0 )
# Wait for all readers (start and stop) to finish
for reader in self.screenReaders['hide']+self.screenReaders['show']:
if reader and reader.isAlive():
self.log.debug('Action "%s"::stop joined the screenReader Thread. Waiting for it to finish' % self.name)
reader.join( 5.0 )
return True
def saveParameters( self, component, action, data ):
host = component.host
channel = host.invokeShell()
channel.send( 'screen -S save_parameters\r\n' )
screenReader = ScreenReader( 'save_parameters', channel, self.log )
screenReader.start()
xml = '<configuration>'
nodes = []
for key,value in data.iteritems():
nodes.append( '<param name=\\"%s\\" value=\\"%s\\" />' % (
self.escapeXMLValue( key ), self.escapeXMLValue( value )))
xml += ''.join( nodes )
xml += '</configuration>'
command = action.parameterFile + ' save "%s"\r\n' % xml
self.log.debug( 'Sending command %s' % command )
channel.send( command )
channel.send( 'exit\r\n' )
screenReader.join( 10.0 )
rawData = screenReader.getBuffer()
return True
def installPackage( self, package, hostId ):
# hostId can be either numeric (the actual id) or it can be
# the name. In the latter case, try to find the host by its
# name
host = None
try:
if hostId.isdigit():
host = self.hosts[ int( hostId )]
else:
for next in self.hosts.values():
if hostId == next.hostname:
host = next
break
if not host:
raise Exception('Host not found')
except:
raise Exception( 'Host %s not found' % hostId )
self.log.info('Installing package %s on host %s' %( package, host.hostname ))
command = 'screen -S "install" sudo apt-get -y install "%s"\r\nexit\r\n' % package
channel = host.invokeShell()
screenReader = ScreenReader(self.name, channel, self.log)
screenReader.start()
channel.send( command )
screenReader.join( 60.0 )
log = screenReader.getBuffer()
self.log.info( 'Package %s installed' % package )
escapedPackageName = package.replace( "'", "\'" )
startScript = '/opt/webportal/%s/start.sh' % escapedPackageName
stopScript = '/opt/webportal/%s/stop.sh' % escapedPackageName
command = 'screen -S installer\r\n[ -e \'%s\' ]; echo "Start$?"\r\n \
[ -e \'%s\' ]; echo "Stop$?"\r\nexit\r\nexit\r\n' % ( startScript, stopScript )
channel = host.invokeShell()
screenReader = ScreenReader(self.name, channel, self.log)
screenReader.start()
channel.send( command )
screenReader.join( 30.0 )
output = screenReader.getBuffer()
startCommand = startScript if output.find( 'Start0' ) >= 0 else ''
stopCommand = stopScript if output.find( 'Stop0' ) >= 0 else ''
self.log.info( 'StartScript found: %s, StopScript found: %s' % ( startCommand, \
stopCommand ))
#self.log.info( output )
return log, startCommand, stopCommand
