4 from random import Random
6 from types import StringTypes
8 from time import strftime
9 TIMEFORMAT="%Y-%m-%d %H:%M:%S"
11 NODEUPDATE_PID_FILE= "/var/run/NodeUpdate.pid"
13 # variables for cron file creation
14 TARGET_SCRIPT = '(echo && date && echo && /usr/bin/NodeUpdate.py start) >>/var/log/NodeUpdate.log 2>&1'
15 TARGET_DESC = 'Update node RPMs periodically'
17 TARGET_SHELL = '/bin/bash'
18 CRON_FILE = '/etc/cron.d/NodeUpdate.cron'
20 YUM_PATH = "/usr/bin/yum"
24 RPM_GPG_PATH = "/etc/pki/rpm-gpg"
26 # location of file containing http/https proxy info, if needed
27 PROXY_FILE = '/etc/planetlab/http_proxy'
29 # this is the flag that indicates an update needs to restart
30 # the system to take effect. it is created by the rpm that requested
32 REBOOT_FLAG = '/etc/planetlab/update-reboot'
34 # location of directory containing boot server ssl certs
35 SSL_CERT_DIR='/mnt/cdrom/bootme/cacert/'
37 # file containing the list of extensions this node has, each
38 # correspond to a package group in yum repository.
39 # this is expected to be updated from the 'extensions tag'
40 # through the 'extensions.php' nodeconfig script
41 EXTENSIONS_FILE='/etc/planetlab/extensions'
43 # file containing a list of rpms that we should attempt to delete
44 # before updating everything else. This list is not removed with
45 # 'yum remove', because that could accidently remove dependency rpms
46 # that were not intended to be deleted.
47 DELETE_RPM_LIST_FILE= '/etc/planetlab/delete-rpm-list'
49 # ok, so the logic should be simple, just yum update the world
50 # however there are many cases in the real life where this
51 # just does not work, because of a glitch somewhere
52 # so, we force the update of crucial pkgs independently, as
53 # the whole group is sometimes too much to swallow
55 UPDATE_PACKAGES_BUILTIN=[ 'NodeManager' ]
56 # and operations can also try to push a list through a conf_file
57 UPDATE_PACKAGES_OPTIONAL_PATH='/etc/planetlab/NodeUpdate.packages'
60 # print out a message only if we are displaying output
63 if isinstance(message,StringTypes) and len(message) >=2 and message[0]=="\n":
66 print strftime(TIMEFORMAT),
71 print strftime(TIMEFORMAT),
75 # create an entry in /etc/cron.d so we run periodically.
76 # we will be run once a day at a 0-59 minute random offset
77 # into a 0-23 random hour
81 randomMinute= Random().randrange( 0, 59, 1 );
82 randomHour= Random().randrange( 0, 11, 1 );
84 f = open( CRON_FILE, 'w' );
85 f.write( "# %s\n" % (TARGET_DESC) );
86 ### xxx is root aliased to the support mailing list ?
87 f.write( "MAILTO=%s\n" % (TARGET_USER) );
88 f.write( "SHELL=%s\n" % (TARGET_SHELL) );
89 f.write( "%s %s,%s * * * %s %s\n\n" %
90 (randomMinute, randomHour, randomHour + 12, TARGET_USER, TARGET_SCRIPT) );
93 print( "Created new cron.d entry." )
95 print( "Unable to create cron.d entry." )
98 # simply remove the cron file we created
101 os.unlink( CRON_FILE )
102 print( "Deleted cron.d entry." )
104 print( "Unable to delete cron.d entry." )
110 def __init__( self, doReboot ):
111 if self.CheckProxy():
112 os.environ['http_proxy']= self.HTTP_PROXY
113 os.environ['HTTP_PROXY']= self.HTTP_PROXY
115 self.doReboot= doReboot
119 def CheckProxy( self ):
120 Message( "Checking existence of proxy config file..." )
122 if os.access(PROXY_FILE, os.R_OK) and os.path.isfile(PROXY_FILE):
123 self.HTTP_PROXY= string.strip(file(PROXY_FILE,'r').readline())
124 Message( "Using proxy %s." % self.HTTP_PROXY )
127 Message( "Not using any proxy." )
131 def InstallKeys( self ):
132 Message( "\nRemoving any existing GPG signing keys from the RPM database" )
133 os.system( "%s --allmatches -e gpg-pubkey" % RPM_PATH )
135 Message( "\nInstalling all GPG signing keys in %s" % RPM_GPG_PATH )
136 os.system( "%s --import %s/*" % (RPM_PATH, RPM_GPG_PATH) )
139 def ClearRebootFlag( self ):
140 os.system( "/bin/rm -rf %s" % REBOOT_FLAG )
143 def CheckForUpdates( self ):
145 Message( "\nRemoving any existing reboot flags" )
146 self.ClearRebootFlag()
148 if self.doReboot == 0:
149 Message( "\nIgnoring any reboot flags set by RPMs" );
151 Message( "\nChecking if yum supports SSL certificate checks" )
152 if os.system( "%s --help | grep -q sslcertdir" % YUM_PATH ) == 0:
153 Message( "It does, using --sslcertdir option" )
154 sslcertdir = "--sslcertdir=" + SSL_CERT_DIR
156 Message( "Unsupported, not using --sslcertdir option" )
160 Message( "\nChecking if yum supports --verbose" )
161 if os.system( "%s --help | grep -q verbose" % YUM_PATH ) == 0:
162 Message( "It does, using --verbose option" )
163 yum_options += " --verbose"
165 Message( "Unsupported, not using --verbose option" )
167 # a configurable list of packages to try and update independently
170 crucial_packages = []
171 for package in UPDATE_PACKAGES_BUILTIN: crucial_packages.append(package)
172 try: crucial_packages += file(UPDATE_PACKAGES_OPTIONAL_PATH).read().split()
174 for package in crucial_packages:
175 Message( "\nUpdating crucial package %s" % package)
176 os.system( "%s %s -y update %s" %(YUM_PATH, yum_options, package))
180 Message( "\nUpdating PlanetLab group" )
181 os.system( "%s %s %s -y groupinstall \"PlanetLab\"" %
182 (YUM_PATH, yum_options, sslcertdir) )
184 Message( "\nUpdating rest of system" )
185 os.system( "%s %s %s -y update" %
186 (YUM_PATH, yum_options, sslcertdir) )
188 Message( "\nChecking for extra groups (extensions) to update" )
189 if os.access(EXTENSIONS_FILE, os.R_OK) and \
190 os.path.isfile(EXTENSIONS_FILE):
191 extensions_contents= file(EXTENSIONS_FILE).read()
192 extensions_contents= string.strip(extensions_contents)
193 if extensions_contents == "":
194 Message( "No extra groups found in file." )
196 extensions_contents.strip()
197 for extension in extensions_contents.split():
198 group = "extension%s" % extension
199 Message( "\nUpdating %s group" % group )
200 os.system( "%s %s %s -y groupinstall \"%s\"" %
201 (YUM_PATH, yum_options, sslcertdir, group) )
203 Message( "No extensions file found" )
205 if os.access(REBOOT_FLAG, os.R_OK) and os.path.isfile(REBOOT_FLAG) and self.doReboot:
206 Message( "\nAt least one update requested the system be rebooted" )
207 self.ClearRebootFlag()
208 os.system( "/sbin/shutdown -r now" )
210 def RebuildRPMdb( self ):
211 Message( "\nRebuilding RPM Database." )
212 try: os.system( "rm /var/lib/rpm/__db.*" )
213 except Exception, err: print "RebuildRPMdb: %s" % err
214 try: os.system( "%s --rebuilddb" % RPM_PATH )
215 except Exception, err: print "RebuildRPMdb: %s" % err
217 def YumCleanAll ( self ):
218 Message ("\nCleaning all yum cache (yum clean all)")
220 os.system( "yum clean all")
224 def RemoveRPMS( self ):
226 Message( "\nLooking for RPMs to be deleted." )
227 if os.access(DELETE_RPM_LIST_FILE, os.R_OK) and \
228 os.path.isfile(DELETE_RPM_LIST_FILE):
229 rpm_list_contents= file(DELETE_RPM_LIST_FILE).read()
230 rpm_list_contents= string.strip(rpm_list_contents)
232 if rpm_list_contents == "":
233 Message( "No RPMs listed in file to delete." )
236 rpm_list= string.join(string.split(rpm_list_contents))
238 Message( "Deleting these RPMs:" )
239 Message( rpm_list_contents )
241 rc= os.system( "%s -ev %s" % (RPM_PATH, rpm_list) )
244 Error( "Unable to delete RPMs, continuing. rc=%d" % rc )
246 Message( "RPMs deleted successfully." )
249 Message( "No RPMs list file found." )
253 if __name__ == "__main__":
255 # if we are invoked with 'start', display the output.
256 # this is useful for running something silently
257 # under cron and as a service (at startup),
258 # so the cron only outputs errors and doesn't
259 # generate mail when it works correctly
263 # if we hit an rpm that requests a reboot, do it if this is
264 # set to 1. can be turned off by adding noreboot to command line
269 if "start" in sys.argv or "display" in sys.argv:
271 Message ("\nTurning on messages")
273 if "noreboot" in sys.argv:
276 if "updatecron" in sys.argv:
277 # simply update the /etc/cron.d file for us, and exit
281 if "removecron" in sys.argv:
286 # see if we are already running by checking the existance
287 # of a PID file, and if it exists, attempting a test kill
288 # to see if the process really does exist. If both of these
291 if os.access(NODEUPDATE_PID_FILE, os.R_OK):
292 pid= string.strip(file(NODEUPDATE_PID_FILE).readline())
294 if os.system("/bin/kill -0 %s > /dev/null 2>&1" % pid) == 0:
295 Message( "It appears we are already running, exiting." )
298 # write out our process id
299 pidfile= file( NODEUPDATE_PID_FILE, 'w' )
300 pidfile.write( "%d\n" % os.getpid() )
304 nodeupdate= NodeUpdate(doReboot)
306 Error( "Unable to initialize." )
308 nodeupdate.RebuildRPMdb()
309 nodeupdate.RemoveRPMS()
310 nodeupdate.InstallKeys()
311 nodeupdate.YumCleanAll()
312 nodeupdate.CheckForUpdates()
313 Message( "\nUpdate complete." )
315 # remove the PID file
316 os.unlink( NODEUPDATE_PID_FILE )