6 from random import Random
7 from types import StringTypes
9 from time import strftime
10 TIMEFORMAT="%Y-%m-%d %H:%M:%S"
12 NODEUPDATE_PID_FILE= "/var/run/NodeUpdate.pid"
14 # variables for cron file creation
15 TARGET_SCRIPT = '(echo && date && echo && /usr/bin/NodeUpdate.py start) >>/var/log/NodeUpdate.log 2>&1'
16 TARGET_DESC = 'Update node RPMs periodically'
18 TARGET_SHELL = '/bin/bash'
19 CRON_FILE = '/etc/cron.d/NodeUpdate.cron'
21 YUM_PATH = "/usr/bin/yum"
25 RPM_GPG_PATH = "/etc/pki/rpm-gpg"
27 # location of file containing http/https proxy info, if needed
28 PROXY_FILE = '/etc/planetlab/http_proxy'
30 # this is the flag that indicates an update needs to restart
31 # the system to take effect. it is created by the rpm that requested
33 REBOOT_FLAG = '/etc/planetlab/update-reboot'
35 # location of directory containing boot server ssl certs
36 SSL_CERT_DIR='/mnt/cdrom/bootme/cacert/'
38 # file containing the list of extensions this node has, each
39 # correspond to a package group in yum repository.
40 # this is expected to be updated from the 'extensions tag'
41 # through the 'extensions.php' nodeconfig script
42 EXTENSIONS_FILE='/etc/planetlab/extensions'
44 # file containing a list of rpms that we should attempt to delete
45 # before updating everything else. This list is not removed with
46 # 'yum remove', because that could accidently remove dependency rpms
47 # that were not intended to be deleted.
48 DELETE_RPM_LIST_FILE= '/etc/planetlab/delete-rpm-list'
50 # ok, so the logic should be simple, just yum update the world
51 # however there are many cases in the real life where this
52 # just does not work, because of a glitch somewhere
53 # so, we force the update of crucial pkgs independently, as
54 # the whole group is sometimes too much to swallow
56 CRUCIAL_PACKAGES_BUILTIN=[
62 # and operations can also try to push a list through a conf_file
63 # should use the second one for consistency, try the first one as well for legacy
64 CRUCIAL_PACKAGES_OPTIONAL_PATHS = [
65 # this is a legacy name, please avoid using this one
66 '/etc/planetlab/NodeUpdate.packages',
67 # file to use with a hand-written conf_file
68 '/etc/planetlab/crucial-rpm-list',
69 # this one could some day be maintained by a predefined config_file
70 '/etc/planetlab/sliceimage-rpm-list',
73 # print out a message only if we are displaying output
76 if isinstance(message,StringTypes) \
77 and len(message) >= 2 \
78 and message[0] == "\n":
81 print strftime(TIMEFORMAT),
86 print strftime(TIMEFORMAT),
90 # create an entry in /etc/cron.d so we run periodically.
91 # we will be run once a day at a 0-59 minute random offset
92 # into a 0-23 random hour
96 randomMinute= Random().randrange(0, 59, 1);
97 randomHour= Random().randrange(0, 11, 1);
99 f = open(CRON_FILE, 'w');
100 f.write("# %s\n" % (TARGET_DESC));
101 ### xxx is root aliased to the support mailing list ?
102 f.write("MAILTO=%s\n" % (TARGET_USER));
103 f.write("SHELL=%s\n" % (TARGET_SHELL));
104 f.write("%s %s,%s * * * %s %s\n\n" %
105 (randomMinute, randomHour,
106 randomHour + 12, TARGET_USER, TARGET_SCRIPT));
109 print("Created new cron.d entry.")
111 print("Unable to create cron.d entry.")
114 # simply remove the cron file we created
115 def RemoveCronFile():
118 print("Deleted cron.d entry.")
120 print("Unable to delete cron.d entry.")
126 def __init__(self, doReboot):
127 if self.CheckProxy():
128 os.environ['http_proxy']= self.HTTP_PROXY
129 os.environ['HTTP_PROXY']= self.HTTP_PROXY
130 self.doReboot= doReboot
132 def CheckProxy(self):
133 Message("Checking existence of proxy config file...")
134 if os.access(PROXY_FILE, os.R_OK) and os.path.isfile(PROXY_FILE):
135 self.HTTP_PROXY= string.strip(file(PROXY_FILE,'r').readline())
136 Message("Using proxy %s." % self.HTTP_PROXY)
139 Message("Not using any proxy.")
142 def InstallKeys(self):
143 Message("\nRemoving any existing GPG signing keys from the RPM database")
144 os.system("%s --allmatches -e gpg-pubkey" % RPM_PATH)
145 Message("\nInstalling all GPG signing keys in %s" % RPM_GPG_PATH)
146 os.system("%s --import %s/*" % (RPM_PATH, RPM_GPG_PATH))
148 def ClearRebootFlag(self):
149 os.system("/bin/rm -rf %s" % REBOOT_FLAG)
151 def CheckForUpdates(self):
152 Message("\nRemoving any existing reboot flags")
153 self.ClearRebootFlag()
154 if self.doReboot == 0:
155 Message("\nIgnoring any reboot flags set by RPMs");
156 Message("\nChecking if yum supports SSL certificate checks")
157 if os.system("%s --help | grep -q sslcertdir" % YUM_PATH) == 0:
158 Message("It does, using --sslcertdir option")
159 sslcertdir = "--sslcertdir=" + SSL_CERT_DIR
161 Message("Unsupported, not using --sslcertdir option")
165 Message("\nChecking if yum supports --verbose")
166 if os.system("%s --help | grep -q verbose" % YUM_PATH) == 0:
167 Message("It does, using --verbose option")
168 yum_options += " --verbose"
170 Message("Unsupported, not using --verbose option")
172 # a configurable list of packages to try and update independently
175 crucial_packages = []
176 for package in CRUCIAL_PACKAGES_BUILTIN:
177 crucial_packages.append(package)
178 for path in CRUCIAL_PACKAGES_OPTIONAL_PATHS:
180 crucial_packages += file(path).read().split()
183 for package in crucial_packages:
184 # if package is not yet installed, like e.g. slice images,
185 # need to yum install, not yum update
186 if os.system("rpm -q %s > /dev/null"%package) == 0:
187 Message("\nUpdating crucial package %s" % package)
188 os.system("%s %s -y update %s" %(YUM_PATH, yum_options, package))
190 Message("\Installing crucial package %s" % package)
191 os.system("%s %s -y install %s" %(YUM_PATH, yum_options, package))
195 Message("\nUpdating PlanetLab group")
196 os.system("%s %s %s -y groupinstall \"PlanetLab\"" %
197 (YUM_PATH, yum_options, sslcertdir))
199 Message("\nUpdating rest of system")
200 os.system("%s %s %s -y update" % (YUM_PATH, yum_options, sslcertdir))
202 Message("\nChecking for extra groups (extensions) to update")
203 if os.access(EXTENSIONS_FILE, os.R_OK) and \
204 os.path.isfile(EXTENSIONS_FILE):
205 extensions_contents= file(EXTENSIONS_FILE).read()
206 extensions_contents= string.strip(extensions_contents)
207 if extensions_contents == "":
208 Message("No extra groups found in file.")
210 extensions_contents.strip()
211 for extension in extensions_contents.split():
212 group = "extension%s" % extension
213 Message("\nUpdating %s group" % group)
214 os.system("%s %s %s -y groupinstall \"%s\"" %
215 (YUM_PATH, yum_options, sslcertdir, group))
217 Message("No extensions file found")
219 if os.access(REBOOT_FLAG, os.R_OK) and os.path.isfile(REBOOT_FLAG) and self.doReboot:
220 Message("\nAt least one update requested the system be rebooted")
221 self.ClearRebootFlag()
222 os.system("/sbin/shutdown -r now")
224 def RebuildRPMdb(self):
225 Message("\nRebuilding RPM Database.")
226 try: os.system("rm /var/lib/rpm/__db.*")
227 except Exception, err: print "RebuildRPMdb: %s" % err
228 try: os.system("%s --rebuilddb" % RPM_PATH)
229 except Exception, err: print "RebuildRPMdb: %s" % err
231 def YumCleanAll (self):
232 Message ("\nCleaning all yum cache (yum clean all)")
234 os.system("yum clean all")
238 def RemoveRPMS(self):
239 Message("\nLooking for RPMs to be deleted.")
240 if os.access(DELETE_RPM_LIST_FILE, os.R_OK) and \
241 os.path.isfile(DELETE_RPM_LIST_FILE):
242 rpm_list_contents= file(DELETE_RPM_LIST_FILE).read().strip()
244 if rpm_list_contents == "":
245 Message("No RPMs listed in file to delete.")
248 rpm_list= string.split(rpm_list_contents)
250 Message("Deleting RPMs from %s: %s" %(DELETE_RPM_LIST_FILE," ".join(rpm_list)))
252 # invoke them separately as otherwise one faulty (e.g. already uninstalled)
253 # would prevent the other ones from uninstalling
256 is_installed = os.system ("%s -q %s"%(RPM_PATH,rpm))==0
258 Message ("Ignoring rpm %s marked to delete, already uninstalled"%rpm)
260 uninstalled = os.system("%s -ev %s" % (RPM_PATH, rpm))==0
262 Message ("Successfully removed RPM %s"%rpm)
265 Error("Unable to delete RPM %s, continuing. rc=%d" % (rpm,uninstalled))
268 Message("No RPMs list file found.")
270 ##############################
271 if __name__ == "__main__":
273 # if we are invoked with 'start', display the output.
274 # this is useful for running something silently
275 # under cron and as a service (at startup),
276 # so the cron only outputs errors and doesn't
277 # generate mail when it works correctly
281 # if we hit an rpm that requests a reboot, do it if this is
282 # set to 1. can be turned off by adding noreboot to command line
287 if "start" in sys.argv or "display" in sys.argv:
289 Message ("\nTurning on messages")
291 if "noreboot" in sys.argv:
294 if "updatecron" in sys.argv:
295 # simply update the /etc/cron.d file for us, and exit
299 if "removecron" in sys.argv:
304 # see if we are already running by checking the existance
305 # of a PID file, and if it exists, attempting a test kill
306 # to see if the process really does exist. If both of these
309 if os.access(NODEUPDATE_PID_FILE, os.R_OK):
310 pid= string.strip(file(NODEUPDATE_PID_FILE).readline())
312 if os.system("/bin/kill -0 %s > /dev/null 2>&1" % pid) == 0:
313 Message("It appears we are already running, exiting.")
316 # write out our process id
317 pidfile= file(NODEUPDATE_PID_FILE, 'w')
318 pidfile.write("%d\n" % os.getpid())
322 nodeupdate= NodeUpdate(doReboot)
324 Error("Unable to initialize.")
326 nodeupdate.RebuildRPMdb()
327 nodeupdate.RemoveRPMS()
328 nodeupdate.InstallKeys()
329 nodeupdate.YumCleanAll()
330 nodeupdate.CheckForUpdates()
331 Message("\nUpdate complete.")
333 # remove the PID file
334 os.unlink(NODEUPDATE_PID_FILE)