diff options
Diffstat (limited to 'plugins/p_mdadm_config.py')
| -rw-r--r-- | plugins/p_mdadm_config.py | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/plugins/p_mdadm_config.py b/plugins/p_mdadm_config.py new file mode 100644 index 0000000..55bb6be --- /dev/null +++ b/plugins/p_mdadm_config.py @@ -0,0 +1,192 @@ +# First Aid Kit - diagnostic and repair tool for Linux +# Copyright (C) 2008 Joel Andres Granados <jgranado@redhat.com> +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +from pyfirstaidkit.plugins import Plugin,Flow +from pyfirstaidkit.returns import * +from pyfirstaidkit.utils import * +from pyfirstaidkit.reporting import PLUGIN +from pyfirstaidkit.issue import SimpleIssue +from pyfirstaidkit import Config +from pyfirstaidkit.errors import * + +import os.path + +class MdadmConfig(Plugin): + """ Addresses the validity and presence of /etc/mdadm.conf """ + flows = Flow.init(Plugin) + name = "mdadm configuration" + version = "0.0.1" + author = "Joel Andres Granados" + + @classmethod + def getDeps(cls): + return set(["root", "experimental", "filesystem"]) + + def __init__(self, *args, **kwargs): + Plugin.__init__(self, *args, **kwargs) + self.currentFileDict = {} #what we read from /etc/mdadm.conf + self.scannedFileDict = {} #what `mdadm --misc --detail --scan` + self.scannedFile = None # what `mdadm --misc --detail --scan` returns + self.configFile = os.path.join(Config.system.root,"/etc/mdadm.conf") + self.backupSpace = self._backups.getBackup(str(self)) + self._issue = SimpleIssue(self.name, "mdadm.con misconfigured") + + def prepare(self): + # We read the configuration file if it exists + if os.path.exists(self.configFile): + self._reporting.info("Gathering information from %s."% + self.configFile, level = PLUGIN, origin = self) + fd = open(self.configFile, "r") + for line in fd.readlines(): + splitline = line.strip("\n").split(" ") + if "ARRAY" in splitline: + self.currentFileDict[splitline[1]] = splitline + fd.close() + + else: + self._reporting.info("File %s was not found."% + self.configFile, level = PLUGIN, origin = self) + + # We execute the mdadm command + self._reporting.info("Scanning for software raid with mdadm.", + level = PLUGIN, origin = self) + mdadmargs = ["--misc", "--detail", "--scan"] + proc = spawnvch(executable = "mdadm", args = mdadmargs, + chroot = Config.system.root) + (out, err) = proc.communicate() + + if err == '': + # means that the command ran with no errors. + for line in out.__str__().split("\n"): + splitline = line.strip("\n").split(" ") + if "ARRAY" in splitline: + self.scannedFileDict[splitline[1]] = splitline + self.scannedFile = out + else: + # This should make the flow go to clean. If there is an error we + # should not trust what mdadm tells us. + self._reporting.info("The mdadm command had the following " \ + "error:%s. The plugin will silently exit."%err, + level = PLUGIN, origin = self) + self._result = None + return + self._result = ReturnSuccess + self._issue.set(reporting = self._reporting, level = PLUGIN, + origin = self) + + def diagnose(self): + # If nothing was returned by the mdadm command. we dont have software + # raid. + if len(self.scannedFileDict) == 0: + self._reporting.info("There was no sofware raid found by the " \ + "mdadm command.... Nothing to do.", level = PLUGIN, + origin = self) + self._result = ReturnSuccess + self._issue.set(checked=True, happened=False, + reporting=self._reporting, level=PLUGIN, origin=self) + return + + # If nothing is detected the result is successfull. + self._result = ReturnSuccess + + # If there is one difference between the configs, regarding the + # ARRAYS. We replace the config file. Lets check for missing arrays + # in the curren config file. + for key, value in self.scannedFileDict.iteritems(): + if not self.currentFileDict.has_key(key): + self._reporting.info("Found that the current mdadm.conf is " \ + "missing: %s."%value, level = PLUGIN, origin = self) + self._result = ReturnFailure + + # Lets check for additional ARRAYS that should not be there. + for key, value in self.currentFileDict.iteritems(): + if not self.scannedFileDict.has_key(key): + self._reporting.info("The followint entry: %s, is in the " \ + "config file but was not detected by mdadm."%value, + level = PLUGIN, origin = self) + self._result = ReturnFailure + + if self._result == ReturnSuccess: + self._reporting.info("There was no problem found with the " \ + "current mdadm.conf file.", level = PLUGIN, origin = self) + + self._issue.set(checked = True, + happened = (self._result == ReturnFailure), + reporting = self._reporting, level = PLUGIN, origin = self) + + def backup(self): + if os.path.isfile(self.configFile): + self._reporting.info("Making a backup of %s."% + self.configFile, level = PLUGIN, origin = self) + self.backupSpace.backupPath(self.configFile) + + else: + self._reporting.info("It appears that the file %s does not "\ + "exist. No backup attempt will be made."%self.configFile, + level = PLUGIN, origin = self) + + self._result = ReturnSuccess + + def fix(self): + try: + self._reporting.info("Going to write configuration to %s."% + self.configFile, level = PLUGIN, origin = self) + fd = open(self.configFile, "w") + fd.write("# File created by Firstaidkit.\n") + fd.write("# DEVICE partitions\n") + fd.write("# MAILADDR root\n") + fd.write(self.scannedFile) + fd.close() + self._reporting.info("Configuration file writen.", level = PLUGIN, + origin = self) + + # The original mdadm.conf will be restore to + # mdadm.conf.firstaidkit, just in case. + self._reporting.info("Will put the old mdadm.conf in %s."% + os.path.join(Config.system.root, + self.configFile+".firstaidkit"), level=PLUGIN, + origin=self) + self.backupSpace.restoreName(self.configFile, + path = self.configFile+".firstaidkit") + self._result = ReturnSuccess + + except IOError: + fd.close() + self._reporting.info("Error occurred while writing %s."% + self.configFile, level = PLUGIN, origin = self) + self._result = ReturnFailure + self._issue.set(fixed = (self._result == ReturnSuccess), + reporting = self._reporting, level = PLUGIN, origin = self) + + def restore(self): + if not self.backupSpace.exists(self.configFile): + # This is the case where there is no config file. + self._reporting.info("The backedup file was not present. " \ + "Assuming that %s was ont present to begin with."% + self.configFile, level = PLUGIN, original = self) + else: + self._reporting.info("Restoring original file.", level = PLUGIN , + origin = self) + self.backupSpace.restoreName(self.configFile) + self._result = ReturnSuccess + + def clean(self): + self._result = ReturnSuccess + +def get_plugin(): + return MdadmConfig + |