update_vals= {}
update_vals['ssh_rsa_key']= ssh_host_key
BootAPI.call_api_function( vars, "BootUpdateNode", (update_vals,) )
# get the kernel version
option = ''
if NODE_MODEL_OPTIONS & ModelOptions.SMP:
option = 'smp'
log.write( "Copying kernel and initrd for booting.\n" )
utils.sysexec( "cp %s/boot/kernel-boot%s /tmp/kernel" % (SYSIMG_PATH,option), log )
utils.sysexec( "cp %s/boot/initrd-boot%s /tmp/initrd" % (SYSIMG_PATH,option), log )
BootAPI.save(vars)
log.write( "Unmounting disks.\n" )
utils.sysexec( "umount %s/vservers" % SYSIMG_PATH, log )
utils.sysexec( "umount %s/proc" % SYSIMG_PATH, log )
utils.sysexec_noerr( "umount %s/dev" % SYSIMG_PATH, log )
utils.sysexec_noerr( "umount %s/sys" % SYSIMG_PATH, log )
utils.sysexec( "umount %s" % SYSIMG_PATH, log )
utils.sysexec( "vgchange -an", log )
ROOT_MOUNTED= 0
vars['ROOT_MOUNTED']= 0
# Change runlevel to 'boot' prior to kexec.
StopRunlevelAgent.Run( vars, log )
def Run(vars, log):
"""
Load the kernel off of a node and boot to it.
This step assumes the disks are mounted on SYSIMG_PATH.
If successful, this function will not return. If it returns, no chain
booting has occurred.
Expect the following variables:
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_SESSION the unique session val set when we requested
the current boot state
PLCONF_DIR The directory to store PL configuration files in
Sets the following variables:
ROOT_MOUNTED the node root file system is mounted
"""
log.write("\n\nStep: Chain booting node.\n")
# make sure we have the variables we need
try:
SYSIMG_PATH = vars["SYSIMG_PATH"]
if SYSIMG_PATH == "":
raise ValueError("SYSIMG_PATH")
PLCONF_DIR = vars["PLCONF_DIR"]
if PLCONF_DIR == "":
raise ValueError("PLCONF_DIR")
# its ok if this is blank
NODE_SESSION = vars["NODE_SESSION"]
NODE_MODEL_OPTIONS = vars["NODE_MODEL_OPTIONS"]
PARTITIONS = vars["PARTITIONS"]
if PARTITIONS == None:
raise ValueError("PARTITIONS")
except KeyError as var:
raise BootManagerException(
"Missing variable in vars: {}\n".format(var))
except ValueError as var:
raise BootManagerException(
"Variable in vars, shouldn't be: {}\n".format(var))
ROOT_MOUNTED = 0
if vars.has_key('ROOT_MOUNTED'):
ROOT_MOUNTED = vars['ROOT_MOUNTED']
if ROOT_MOUNTED == 0:
log.write("Mounting node partitions\n")
# 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_devices_dict(vars, log)
utils.sysexec("vgscan", log)
utils.sysexec("vgchange -ay planetlab", log)
utils.makedirs(SYSIMG_PATH)
cmd = "mount {} {}".format(PARTITIONS["root"], SYSIMG_PATH)
utils.sysexec(cmd, log)
cmd = "mount -t proc none {}/proc".format(SYSIMG_PATH)
utils.sysexec(cmd, log)
cmd = "mount {} {}/vservers".format(PARTITIONS["vservers"],
SYSIMG_PATH)
utils.sysexec(cmd, log)
ROOT_MOUNTED = 1
vars['ROOT_MOUNTED'] = 1
utils.display_disks_status(PARTITIONS, "In ChainBootNode", log)
# write out the session value /etc/planetlab/session
try:
session_file_path = "{}/{}/session".format(SYSIMG_PATH, PLCONF_DIR)
session_file = file(session_file_path, "w")
session_file.write(str(NODE_SESSION))
session_file.close()
session_file = None
log.write("Updated /etc/planetlab/session\n")
except IOError as e:
log.write(
"Unable to write out /etc/planetlab/session, continuing anyway\n")
# update configuration files
log.write("Updating configuration files.\n")
# avoid using conf_files initscript as we're moving to systemd on some platforms
if (vars['ONE_PARTITION'] != '1'):
try:
cmd = "/usr/bin/env python /usr/share/NodeManager/conf_files.py --noscripts"
utils.sysexec_chroot(SYSIMG_PATH, cmd, log)
except IOError as e:
log.write("conf_files failed with \n {}".format(e))
# update node packages
log.write("Running node update.\n")
if os.path.exists(SYSIMG_PATH + "/usr/bin/NodeUpdate.py"):
cmd = "/usr/bin/NodeUpdate.py start noreboot"
else:
# for backwards compatibility
cmd = "/usr/local/planetlab/bin/NodeUpdate.py start noreboot"
utils.sysexec_chroot(SYSIMG_PATH, cmd, log)
# Re-generate initrd right before kexec call
# this is not required anymore on recent depls.
if vars['virt'] == 'vs':
MakeInitrd.Run(vars, log)
# the following step should be done by NM
UpdateNodeConfiguration.Run(vars, log)
log.write("Updating ssh public host key with PLC.\n")
ssh_host_key = ""
try:
ssh_host_key_file = file(
"{}/etc/ssh/ssh_host_rsa_key.pub".format(SYSIMG_PATH), "r")
ssh_host_key = ssh_host_key_file.read().strip()
ssh_host_key_file.close()
ssh_host_key_file = None
except IOError as e:
pass
update_vals = {}
update_vals['ssh_rsa_key'] = ssh_host_key
BootAPI.call_api_function(vars, "BootUpdateNode", (update_vals, ))
# get the kernel version
option = ''
if NODE_MODEL_OPTIONS & ModelOptions.SMP:
option = 'smp'
log.write("Copying kernel and initrd for booting.\n")
if vars['virt'] == 'vs':
utils.sysexec(
"cp {}/boot/kernel-boot{} /tmp/kernel".format(SYSIMG_PATH, option),
log)
utils.sysexec(
"cp {}/boot/initrd-boot{} /tmp/initrd".format(SYSIMG_PATH, option),
log)
else:
# Use chroot to call rpm, b/c the bootimage&nodeimage rpm-versions may not work together
try:
kversion = os.popen("chroot {} rpm -qa kernel | tail -1 | cut -c 8-"\
.format(SYSIMG_PATH)).read().rstrip()
major_version = int(
kversion[0]) # Check if the string looks like a kernel version
except:
# Try a different method for non-rpm-based distributions
kversion = os.popen("ls -lrt {}/lib/modules | tail -1 | awk '{print $9;}'"\
.format(SYSIMG_PATH)).read().rstrip()
utils.sysexec(
"cp {}/boot/vmlinuz-{} /tmp/kernel".format(SYSIMG_PATH, kversion),
log)
candidates = []
# f16/18: expect initramfs image here
candidates.append("/boot/initramfs-{}.img".format(kversion))
# f20: uses a uid of some kind, e.g. /boot/543f88c129de443baaa65800cf3927ce/<kversion>/initrd
candidates.append("/boot/*/{}/initrd".format(kversion))
# Ubuntu:
candidates.append("/boot/initrd.img-{}".format(kversion))
def find_file_in_sysimg(candidates):
import glob
for pattern in candidates:
matches = glob.glob(SYSIMG_PATH + pattern)
log.write("locating initrd: found {} matches in {}\n".format(
len(matches), pattern))
if matches:
return matches[0]
initrd = find_file_in_sysimg(candidates)
if initrd:
utils.sysexec("cp {} /tmp/initrd".format(initrd), log)
else:
raise Exception("Unable to locate initrd - bailing out")
BootAPI.save(vars)
log.write("Unmounting disks.\n")
if (vars['ONE_PARTITION'] != '1'):
utils.sysexec("umount {}/vservers".format(SYSIMG_PATH), log)
utils.sysexec("umount {}/proc".format(SYSIMG_PATH), log)
utils.sysexec_noerr("umount {}/dev".format(SYSIMG_PATH), log)
utils.sysexec_noerr("umount {}/sys".format(SYSIMG_PATH), log)
utils.sysexec("umount {}".format(SYSIMG_PATH), log)
utils.sysexec("vgchange -an", log)
ROOT_MOUNTED = 0
vars['ROOT_MOUNTED'] = 0
# Change runlevel to 'boot' prior to kexec.
StopRunlevelAgent.Run(vars, log)
log.write("Unloading modules and chain booting to new kernel.\n")
# further use of log after Upload will only output to screen
log.Upload("/root/.bash_eternal_history")
# regardless of whether kexec works or not, we need to stop trying to
# run anything
cancel_boot_flag = "/tmp/CANCEL_BOOT"
utils.sysexec("touch {}".format(cancel_boot_flag), log)
# on 2.x cds (2.4 kernel) for sure, we need to shutdown everything
# to get kexec to work correctly. Even on 3.x cds (2.6 kernel),
# there are a few buggy drivers that don't disable their hardware
# correctly unless they are first unloaded.
utils.sysexec_noerr("ifconfig eth0 down", log)
utils.sysexec_noerr("killall dhclient", log)
if vars['virt'] == 'vs':
utils.sysexec_noerr("umount -a -r -t ext2,ext3", log)
else:
utils.sysexec_noerr("umount -a -r -t ext2,ext3,btrfs", log)
utils.sysexec_noerr("modprobe -r lvm-mod", log)
# modules that should not get unloaded
# unloading cpqphp causes a kernel panic
blacklist = ["floppy", "cpqphp", "i82875p_edac", "mptspi"]
try:
modules = file("/tmp/loadedmodules", "r")
for line in modules:
module = string.strip(line)
if module in blacklist:
log.write(
"Skipping unload of kernel module '{}'.\n".format(module))
elif module != "":
log.write("Unloading {}\n".format(module))
utils.sysexec_noerr("modprobe -r {}".format(module), log)
if "e1000" in module:
log.write(
"Unloading e1000 driver; sleeping 4 seconds...\n")
time.sleep(4)
modules.close()
except IOError:
log.write("Couldn't read /tmp/loadedmodules, continuing.\n")
try:
modules = file("/proc/modules", "r")
# Get usage count for USB
usb_usage = 0
for line in modules:
try:
# Module Size UsageCount UsedBy State LoadAddress
parts = string.split(line)
if parts[0] == "usb_storage":
usb_usage += int(parts[2])
except IndexError as e:
log.write("Couldn't parse /proc/modules, continuing.\n")
modules.seek(0)
for line in modules:
try:
# Module Size UsageCount UsedBy State LoadAddress
parts = string.split(line)
# While we would like to remove all "unused" modules,
# you can't trust usage count, especially for things
# like network drivers or RAID array drivers. Just try
# and unload a few specific modules that we know cause
# problems during chain boot, such as USB host
# controller drivers (HCDs) (PL6577).
# if int(parts[2]) == 0:
if False and re.search('_hcd$', parts[0]):
if usb_usage > 0:
log.write("NOT unloading {} since USB may be in use\n".
format(parts[0]))
else:
log.write("Unloading {}\n".format(parts[0]))
utils.sysexec_noerr("modprobe -r {}".format(parts[0]),
log)
except IndexError as e:
log.write("Couldn't parse /proc/modules, continuing.\n")
except IOError:
log.write("Couldn't read /proc/modules, continuing.\n")
kargs = "root={} ramdisk_size=8192".format(PARTITIONS["root"])
if NODE_MODEL_OPTIONS & ModelOptions.SMP:
kargs = kargs + " " + "acpi=off"
try:
kargsfb = open("/kargs.txt", "r")
moreargs = kargsfb.readline()
kargsfb.close()
moreargs = moreargs.strip()
log.write(
'Parsed in "{}" kexec args from /kargs.txt\n'.format(moreargs))
kargs = kargs + " " + moreargs
except IOError:
# /kargs.txt does not exist, which is fine. Just kexec with default
# kargs, which is ramdisk_size=8192
pass
utils.sysexec_noerr('hwclock --systohc --utc ', log)
# utils.breakpoint("Before kexec");
try:
utils.sysexec(
'kexec --force --initrd=/tmp/initrd --append="{}" /tmp/kernel'.
format(kargs), log)
except BootManagerException as e:
# if kexec fails, we've shut the machine down to a point where nothing
# can run usefully anymore (network down, all modules unloaded, file
# systems unmounted. write out the error, and cancel the boot process
log.write("\n\n")
log.write("-------------------------------------------------------\n")
log.write("kexec failed with the following error. Please report\n")
log.write("this problem to [email protected].\n\n")
log.write(str(e) + "\n\n")
log.write("The boot process has been canceled.\n")
log.write(
"-------------------------------------------------------\n\n")
return
