X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=source%2Fsteps%2FValidateNodeInstall.py;fp=source%2Fsteps%2FValidateNodeInstall.py;h=c987170204f57dfa65223014594bddf587e6cb24;hb=7cd82eb93512460e8dd748f9737648aabf05f70d;hp=0000000000000000000000000000000000000000;hpb=0ead051299a3094173442795ee262b0900a71ecd;p=bootmanager.git diff --git a/source/steps/ValidateNodeInstall.py b/source/steps/ValidateNodeInstall.py new file mode 100644 index 0000000..c987170 --- /dev/null +++ b/source/steps/ValidateNodeInstall.py @@ -0,0 +1,172 @@ +#!/usr/bin/python +# +# Copyright (c) 2003 Intel Corporation +# All rights reserved. +# +# Copyright (c) 2004-2006 The Trustees of Princeton University +# All rights reserved. + +import os + +from Exceptions import * +import utils +import systeminfo +import ModelOptions + + +def Run( vars, log ): + """ + See if a node installation is valid. More checks should certainly be + done in the future, but for now, make sure that the sym links kernel-boot + exist in /boot + + Expect the following variables to be set: + SYSIMG_PATH the path where the system image will be mounted + (always starts with TEMP_PATH) + ROOT_MOUNTED the node root file system is mounted + NODE_ID The db node_id for this machine + PLCONF_DIR The directory to store the configuration file in + + Set the following variables upon successfully running: + ROOT_MOUNTED the node root file system is mounted + """ + + log.write( "\n\nStep: Validating node installation.\n" ) + + # make sure we have the variables we need + try: + SYSIMG_PATH= vars["SYSIMG_PATH"] + if SYSIMG_PATH == "": + raise ValueError, "SYSIMG_PATH" + + NODE_ID= vars["NODE_ID"] + if NODE_ID == "": + raise ValueError, "NODE_ID" + + PLCONF_DIR= vars["PLCONF_DIR"] + if PLCONF_DIR == "": + raise ValueError, "PLCONF_DIR" + + NODE_MODEL_OPTIONS= vars["NODE_MODEL_OPTIONS"] + + PARTITIONS= vars["PARTITIONS"] + if PARTITIONS == None: + raise ValueError, "PARTITIONS" + + except KeyError, var: + raise BootManagerException, "Missing variable in vars: %s\n" % var + except ValueError, var: + raise BootManagerException, "Variable in vars, shouldn't be: %s\n" % var + + + ROOT_MOUNTED= 0 + if vars.has_key('ROOT_MOUNTED'): + ROOT_MOUNTED= vars['ROOT_MOUNTED'] + + # mount the root system image if we haven't already. + # capture BootManagerExceptions during the vgscan/change and mount + # calls, so we can return 0 instead + if ROOT_MOUNTED == 0: + + # simply creating an instance of this class and listing the system + # block devices will make them show up so vgscan can find the planetlab + # volume group + systeminfo.get_block_device_list(vars, log) + + try: + utils.sysexec( "vgscan", log ) + utils.sysexec( "vgchange -ay planetlab", log ) + except BootManagerException, e: + log.write( "BootManagerException during vgscan/vgchange: %s\n" % + str(e) ) + return 0 + + utils.makedirs( SYSIMG_PATH ) + + for filesystem in ("root","vservers"): + try: + # first run fsck to prevent fs corruption from hanging mount... + log.write( "fsck %s file system\n" % filesystem ) + utils.sysexec("e2fsck -v -p %s" % (PARTITIONS[filesystem]), log, fsck=True) + except BootManagerException, e: + log.write( "BootManagerException during fsck of %s (%s) filesystem : %s\n" % + (filesystem, PARTITIONS[filesystem], str(e)) ) + try: + log.write( "Trying to recover filesystem errors on %s\n" % filesystem ) + utils.sysexec("e2fsck -v -y %s" % (PARTITIONS[filesystem]),log, fsck=True) + except BootManagerException, e: + log.write( "BootManagerException during trying to recover filesystem errors on %s (%s) filesystem : %s\n" % + (filesystem, PARTITIONS[filesystem], str(e)) ) + return -1 + else: + # disable time/count based filesystems checks + utils.sysexec_noerr( "tune2fs -c -1 -i 0 %s" % PARTITIONS[filesystem], log) + + try: + # then attempt to mount them + log.write( "mounting root file system\n" ) + utils.sysexec("mount -t ext3 %s %s" % (PARTITIONS["root"],SYSIMG_PATH),log) + except BootManagerException, e: + log.write( "BootManagerException during mount of /root: %s\n" % str(e) ) + return -2 + + try: + PROC_PATH = "%s/proc" % SYSIMG_PATH + utils.makedirs(PROC_PATH) + log.write( "mounting /proc\n" ) + utils.sysexec( "mount -t proc none %s" % PROC_PATH, log ) + except BootManagerException, e: + log.write( "BootManagerException during mount of /proc: %s\n" % str(e) ) + return -2 + + try: + VSERVERS_PATH = "%s/vservers" % SYSIMG_PATH + utils.makedirs(VSERVERS_PATH) + log.write( "mounting vserver partition in root file system\n" ) + utils.sysexec("mount -t ext3 %s %s" % (PARTITIONS["vservers"], VSERVERS_PATH), log) + except BootManagerException, e: + log.write( "BootManagerException during mount of /vservers: %s\n" % str(e) ) + return -2 + + ROOT_MOUNTED= 1 + vars['ROOT_MOUNTED']= 1 + + # check if the base kernel is installed + # these 2 links are created by our kernel's post-install scriplet + log.write("Checking for a custom kernel\n") + try: + os.stat("%s/boot/kernel-boot" % SYSIMG_PATH) + except OSError, e: + log.write( "Couldn't locate base kernel (you might be using the stock kernel).\n") + return -3 + + # check if the model specified kernel is installed + option = '' + if NODE_MODEL_OPTIONS & ModelOptions.SMP: + option = 'smp' + try: + os.stat("%s/boot/kernel-boot%s" % (SYSIMG_PATH,option)) + except OSError, e: + # smp kernel is not there; remove option from modeloptions + # such that the rest of the code base thinks we are just + # using the base kernel. + NODE_MODEL_OPTIONS = NODE_MODEL_OPTIONS & ~ModelOptions.SMP + vars["NODE_MODEL_OPTIONS"] = NODE_MODEL_OPTIONS + log.write( "WARNING: Couldn't locate smp kernel.\n") + + # write out the node id to /etc/planetlab/node_id. if this fails, return + # 0, indicating the node isn't a valid install. + try: + node_id_file_path= "%s/%s/node_id" % (SYSIMG_PATH,PLCONF_DIR) + node_id_file= file( node_id_file_path, "w" ) + node_id_file.write( str(NODE_ID) ) + node_id_file.close() + node_id_file= None + log.write( "Updated /etc/planetlab/node_id\n" ) + except IOError, e: + log.write( "Unable to write out /etc/planetlab/node_id\n" ) + return 0 + + log.write( "Node installation appears to be ok\n" ) + + return 1