def _rootfs_guess_by_image(target, image, boot_dev):
# Gave a None partition, means pick our own based on a guess. We
# know what image we want to install, so we will scan the all the
# target's root partitions (defined in tags/properties
# pos_root_XYZ) to see who has installed the most similar thing to
# image and use that (so it is faster to rsync it).
partl = {}
empties = []
# refresh target information FIXME: need a better method
target.rt = target.rtb.rest_tb_target_update(target.id)
for tag, value in target.rt.iteritems():
if not tag.startswith("pos_root_"):
continue
dev_basename = tag.replace("pos_root_", "")
dev_name = "/dev/" + dev_basename
if value == 'EMPTY':
empties.append(dev_name)
else:
partl[dev_name] = value
target.report_info("POS: %s: empty partitions: %s"
% (boot_dev, " ".join(empties)), dlevel = 2)
target.report_info("POS: %s: imaged partitions: %s"
% (boot_dev,
" ".join([ i[0] + "|" + i[1]
for i in partl.items() ])),
dlevel = 2)
if not partl and not empties:
# there were no pos_root_XYZ entries, so that means we are not
# initialized properly, reinit
target.report_info("POS: %s: no root partitions known, uninitialized?"
% boot_dev, dlevel = 1)
return None
# We don't have empties to spare, so choose one that is the most
# similar, to improve the transfer rate
#
# This prolly can be made more efficient, like collect least-used
# partition data? to avoid the situation where two clients keep
# imaging over each other when they could have two separate images
root_part_dev, score, seed = pos.image_seed_match(partl, image)
if score == 0:
# none is a good match, find an empty one...if there are
# non empty, just any
if empties:
root_part_dev = random.choice(empties)
target.report_info("POS: picked up empty root partition %s"
% root_part_dev, dlevel = 2)
else:
root_part_dev = random.choice(partl.keys())
target.report_info(
"POS: picked up random partition %s, because none of the "
"existing installed ones was a good match and there "
"are no empty ones" % root_part_dev, dlevel = 2)
else:
target.report_info("POS: picked up root partition %s for %s "
"due to a %.02f similarity with %s"
% (root_part_dev, seed, score, seed), dlevel = 2)
return root_part_dev
def _rootfs_guess_by_image(target, image, boot_dev):
# Gave a None partition, means pick our own based on a guess. We
# know what image we want to install, so we will scan the all the
# target's root partitions (defined in tags/properties
# pos_root_XYZ) to see who has installed the most similar thing to
# image and use that (so it is faster to rsync it).
partl = {}
empties = []
# refresh target information FIXME: need a better method
target.rt = target.rtb.rest_tb_target_update(target.id)
for tag, value in target.rt.iteritems():
if not tag.startswith("pos_root_"):
continue
dev_basename = tag.replace("pos_root_", "")
dev_name = "/dev/" + dev_basename
if value == 'EMPTY':
empties.append(dev_name)
else:
partl[dev_name] = value
target.report_info("POS: %s: empty partitions: %s" %
(boot_dev, " ".join(empties)),
dlevel=2)
target.report_info(
"POS: %s: imaged partitions: %s" %
(boot_dev, " ".join([i[0] + "|" + i[1] for i in partl.items()])),
dlevel=2)
if not partl and not empties:
# there were no pos_root_XYZ entries, so that means we are not
# initialized properly, reinit
target.report_info(
"POS: %s: no root partitions known, uninitialized?" % boot_dev,
dlevel=1)
return None
# We don't have empties to spare, so choose one that is the most
# similar, to improve the transfer rate
#
# This prolly can be made more efficient, like collect least-used
# partition data? to avoid the situation where two clients keep
# imaging over each other when they could have two separate images
root_part_dev, score, check_empties, seed = pos.image_seed_match(
partl, image)
if score == 0:
# none is a good match, find an empty one...if there are
# non empty, just any
if empties:
root_part_dev = random.choice(empties)
target.report_info("POS: picked up empty root partition %s" %
root_part_dev,
dlevel=2)
else:
root_part_dev = random.choice(partl.keys())
target.report_info(
"POS: picked up random partition %s, because none of the "
"existing installed ones was a good match and there "
"are no empty ones" % root_part_dev,
dlevel=2)
elif check_empties and empties:
# This is for the case where image and seed have the same distro
# but different spin. We want to check our luck if there is an empty
# partition. If there isn't, we will just take the given one from
# pos.image_seed_match.
root_part_dev = random.choice(empties)
target.report_info("POS: picked up empty root partition %s" %
root_part_dev,
dlevel=2)
else:
target.report_info("POS: picked up root partition %s for %s "
"due to a %.02f similarity with %s" %
(root_part_dev, seed, score, seed),
dlevel=2)
return root_part_dev