pvc/daemon-common/ceph.py

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2019-09-26 14:07:52 -04:00
#!/usr/bin/env python3
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# ceph.py - PVC client function library, Ceph cluster fuctions
# Part of the Parallel Virtual Cluster (PVC) system
#
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# Copyright (C) 2018-2020 Joshua M. Boniface <joshua@boniface.me>
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#
# 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 3 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, see <https://www.gnu.org/licenses/>.
#
###############################################################################
import os
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import re
import click
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import json
import time
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import math
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import daemon_lib.ansiprint as ansiprint
import daemon_lib.zkhandler as zkhandler
import daemon_lib.common as common
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#
# Supplemental functions
#
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# Verify OSD is valid in cluster
def verifyOSD(zk_conn, osd_id):
if zkhandler.exists(zk_conn, '/ceph/osds/{}'.format(osd_id)):
return True
else:
return False
# Verify Pool is valid in cluster
def verifyPool(zk_conn, name):
if zkhandler.exists(zk_conn, '/ceph/pools/{}'.format(name)):
return True
else:
return False
# Verify Volume is valid in cluster
def verifyVolume(zk_conn, pool, name):
if zkhandler.exists(zk_conn, '/ceph/volumes/{}/{}'.format(pool, name)):
return True
else:
return False
# Verify Snapshot is valid in cluster
def verifySnapshot(zk_conn, pool, volume, name):
if zkhandler.exists(zk_conn, '/ceph/snapshots/{}/{}/{}'.format(pool, volume, name)):
return True
else:
return False
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# Verify OSD path is valid in cluster
def verifyOSDBlock(zk_conn, node, device):
for osd in zkhandler.listchildren(zk_conn, '/ceph/osds'):
osd_node = zkhandler.readdata(zk_conn, '/ceph/osds/{}/node'.format(osd))
osd_device = zkhandler.readdata(zk_conn, '/ceph/osds/{}/device'.format(osd))
if node == osd_node and device == osd_device:
return osd
return None
# Format byte sizes to/from human-readable units
byte_unit_matrix = {
'B': 1,
'K': 1024,
'M': 1024*1024,
'G': 1024*1024*1024,
'T': 1024*1024*1024*1024,
'P': 1024*1024*1024*1024*1024
}
def format_bytes_tohuman(databytes):
datahuman = ''
for unit in sorted(byte_unit_matrix, key=byte_unit_matrix.get, reverse=True):
new_bytes = int(math.ceil(databytes / byte_unit_matrix[unit]))
# Round up if 5 or more digits
if new_bytes > 9999:
# We can jump down another level
continue
else:
# We're at the end, display with this size
datahuman = '{}{}'.format(new_bytes, unit)
return datahuman
def format_bytes_fromhuman(datahuman):
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# Trim off human-readable character
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dataunit = str(datahuman)[-1]
datasize = int(str(datahuman)[:-1])
if not re.match('[A-Z]', dataunit):
dataunit = 'B'
datasize = int(datahuman)
databytes = datasize * byte_unit_matrix[dataunit]
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return '{}B'.format(databytes)
# Format ops sizes to/from human-readable units
ops_unit_matrix = {
'': 1,
'K': 1000,
'M': 1000*1000,
'G': 1000*1000*1000,
'T': 1000*1000*1000*1000,
'P': 1000*1000*1000*1000*1000
}
def format_ops_tohuman(dataops):
datahuman = ''
for unit in sorted(ops_unit_matrix, key=ops_unit_matrix.get, reverse=True):
new_ops = int(math.ceil(dataops / ops_unit_matrix[unit]))
# Round up if 5 or more digits
if new_ops > 9999:
# We can jump down another level
continue
else:
# We're at the end, display with this size
datahuman = '{}{}'.format(new_ops, unit)
return datahuman
def format_ops_fromhuman(datahuman):
# Trim off human-readable character
dataunit = datahuman[-1]
datasize = int(datahuman[:-1])
dataops = datasize * ops_unit_matrix[dataunit]
return '{}'.format(dataops)
def format_pct_tohuman(datapct):
datahuman = "{0:.1f}".format(float(datapct * 100.0))
return datahuman
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#
# Status functions
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#
def get_status(zk_conn):
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primary_node = zkhandler.readdata(zk_conn, '/primary_node')
ceph_status = zkhandler.readdata(zk_conn, '/ceph').rstrip()
# Create a data structure for the information
status_data = {
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'type': 'status',
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'primary_node': primary_node,
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'ceph_data': ceph_status
}
return True, status_data
def get_radosdf(zk_conn):
primary_node = zkhandler.readdata(zk_conn, '/primary_node')
ceph_df = zkhandler.readdata(zk_conn, '/ceph/radosdf').rstrip()
# Create a data structure for the information
status_data = {
'type': 'utilization',
'primary_node': primary_node,
'ceph_data': ceph_df
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}
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return True, status_data
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def format_raw_output(status_data):
click.echo('{bold}Ceph cluster {stype} (primary node {end}{blue}{primary}{end}{bold}){end}\n'.format(bold=ansiprint.bold(), end=ansiprint.end(), blue=ansiprint.blue(), stype=status_data['type'], primary=status_data['primary_node']))
click.echo(status_data['ceph_data'])
click.echo('')
#
# OSD functions
#
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def getClusterOSDList(zk_conn):
# Get a list of VNIs by listing the children of /networks
osd_list = zkhandler.listchildren(zk_conn, '/ceph/osds')
return osd_list
def getOSDInformation(zk_conn, osd_id):
# Parse the stats data
osd_stats_raw = zkhandler.readdata(zk_conn, '/ceph/osds/{}/stats'.format(osd_id))
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osd_stats = dict(json.loads(osd_stats_raw))
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osd_information = {
'id': osd_id,
'stats': osd_stats
}
return osd_information
def getOutputColoursOSD(osd_information):
# Set the UP status
if osd_information['stats']['up'] == 1:
osd_up_flag = 'Yes'
osd_up_colour = ansiprint.green()
else:
osd_up_flag = 'No'
osd_up_colour = ansiprint.red()
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# Set the IN status
if osd_information['stats']['in'] == 1:
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osd_in_flag = 'Yes'
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osd_in_colour = ansiprint.green()
else:
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osd_in_flag = 'No'
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osd_in_colour = ansiprint.red()
return osd_up_flag, osd_up_colour, osd_in_flag, osd_in_colour
# OSD addition and removal uses the /cmd/ceph pipe
# These actions must occur on the specific node they reference
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def add_osd(zk_conn, node, device, weight):
# Verify the target node exists
if not common.verifyNode(zk_conn, node):
return False, 'ERROR: No node named "{}" is present in the cluster.'.format(node)
# Verify target block device isn't in use
block_osd = verifyOSDBlock(zk_conn, node, device)
if block_osd:
return False, 'ERROR: Block device "{}" on node "{}" is used by OSD "{}"'.format(device, node, block_osd)
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# Tell the cluster to create a new OSD for the host
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add_osd_string = 'osd_add {},{},{}'.format(node, device, weight)
zkhandler.writedata(zk_conn, {'/cmd/ceph': add_osd_string})
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# Wait 1/2 second for the cluster to get the message and start working
time.sleep(0.5)
# Acquire a read lock, so we get the return exclusively
lock = zkhandler.readlock(zk_conn, '/cmd/ceph')
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with lock:
try:
result = zkhandler.readdata(zk_conn, '/cmd/ceph').split()[0]
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if result == 'success-osd_add':
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message = 'Created new OSD with block device "{}" on node "{}".'.format(device, node)
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success = True
else:
message = 'ERROR: Failed to create new OSD; check node logs for details.'
success = False
except:
message = 'ERROR: Command ignored by node.'
success = False
# Acquire a write lock to ensure things go smoothly
lock = zkhandler.writelock(zk_conn, '/cmd/ceph')
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with lock:
time.sleep(0.5)
zkhandler.writedata(zk_conn, {'/cmd/ceph': ''})
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return success, message
def remove_osd(zk_conn, osd_id):
if not verifyOSD(zk_conn, osd_id):
return False, 'ERROR: No OSD with ID "{}" is present in the cluster.'.format(osd_id)
# Tell the cluster to remove an OSD
remove_osd_string = 'osd_remove {}'.format(osd_id)
zkhandler.writedata(zk_conn, {'/cmd/ceph': remove_osd_string})
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# Wait 1/2 second for the cluster to get the message and start working
time.sleep(0.5)
# Acquire a read lock, so we get the return exclusively
lock = zkhandler.readlock(zk_conn, '/cmd/ceph')
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with lock:
try:
result = zkhandler.readdata(zk_conn, '/cmd/ceph').split()[0]
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if result == 'success-osd_remove':
message = 'Removed OSD "{}" from the cluster.'.format(osd_id)
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success = True
else:
message = 'ERROR: Failed to remove OSD; check node logs for details.'
success = False
except:
success = False
message = 'ERROR Command ignored by node.'
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# Acquire a write lock to ensure things go smoothly
lock = zkhandler.writelock(zk_conn, '/cmd/ceph')
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with lock:
time.sleep(0.5)
zkhandler.writedata(zk_conn, {'/cmd/ceph': ''})
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return success, message
def in_osd(zk_conn, osd_id):
if not verifyOSD(zk_conn, osd_id):
return False, 'ERROR: No OSD with ID "{}" is present in the cluster.'.format(osd_id)
retcode, stdout, stderr = common.run_os_command('ceph osd in {}'.format(osd_id))
if retcode:
return False, 'ERROR: Failed to enable OSD {}: {}'.format(osd_id, stderr)
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return True, 'Set OSD {} online.'.format(osd_id)
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def out_osd(zk_conn, osd_id):
if not verifyOSD(zk_conn, osd_id):
return False, 'ERROR: No OSD with ID "{}" is present in the cluster.'.format(osd_id)
retcode, stdout, stderr = common.run_os_command('ceph osd out {}'.format(osd_id))
if retcode:
return False, 'ERROR: Failed to disable OSD {}: {}'.format(osd_id, stderr)
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return True, 'Set OSD {} offline.'.format(osd_id)
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def set_osd(zk_conn, option):
retcode, stdout, stderr = common.run_os_command('ceph osd set {}'.format(option))
if retcode:
return False, 'ERROR: Failed to set property "{}": {}'.format(option, stderr)
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return True, 'Set OSD property "{}".'.format(option)
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def unset_osd(zk_conn, option):
retcode, stdout, stderr = common.run_os_command('ceph osd unset {}'.format(option))
if retcode:
return False, 'ERROR: Failed to unset property "{}": {}'.format(option, stderr)
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return True, 'Unset OSD property "{}".'.format(option)
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def get_list_osd(zk_conn, limit, is_fuzzy=True):
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osd_list = []
full_osd_list = zkhandler.listchildren(zk_conn, '/ceph/osds')
if is_fuzzy and limit:
# Implicitly assume fuzzy limits
if not re.match('\^.*', limit):
limit = '.*' + limit
if not re.match('.*\$', limit):
limit = limit + '.*'
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for osd in full_osd_list:
if limit:
try:
if re.match(limit, osd):
osd_list.append(getOSDInformation(zk_conn, osd))
except Exception as e:
return False, 'Regex Error: {}'.format(e)
else:
osd_list.append(getOSDInformation(zk_conn, osd))
return True, osd_list
def format_list_osd(osd_list):
osd_list_output = []
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osd_id_length = 3
osd_up_length = 4
osd_in_length = 4
osd_size_length = 5
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osd_weight_length = 3
osd_reweight_length = 5
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osd_pgs_length = 4
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osd_node_length = 5
osd_used_length = 5
osd_free_length = 6
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osd_util_length = 6
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osd_var_length = 5
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osd_wrops_length = 4
osd_wrdata_length = 5
osd_rdops_length = 4
osd_rddata_length = 5
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for osd_information in osd_list:
try:
# If this happens, the node hasn't checked in fully yet, so just ignore it
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if osd_information['stats']['node'] == '|':
continue
except KeyError:
continue
# Deal with the size to human readable
osd_information['stats']['size'] = osd_information['stats']['kb'] * 1024
for datatype in 'size', 'wr_data', 'rd_data':
databytes = osd_information['stats'][datatype]
databytes_formatted = format_bytes_tohuman(int(databytes))
osd_information['stats'][datatype] = databytes_formatted
for datatype in 'wr_ops', 'rd_ops':
dataops = osd_information['stats'][datatype]
dataops_formatted = format_ops_tohuman(int(dataops))
osd_information['stats'][datatype] = dataops_formatted
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# Set the OSD ID length
_osd_id_length = len(osd_information['id']) + 1
if _osd_id_length > osd_id_length:
osd_id_length = _osd_id_length
_osd_node_length = len(osd_information['stats']['node']) + 1
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if _osd_node_length > osd_node_length:
osd_node_length = _osd_node_length
# Set the size and length
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_osd_size_length = len(str(osd_information['stats']['size'])) + 1
if _osd_size_length > osd_size_length:
osd_size_length = _osd_size_length
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# Set the weight and length
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_osd_weight_length = len(str(osd_information['stats']['weight'])) + 1
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if _osd_weight_length > osd_weight_length:
osd_weight_length = _osd_weight_length
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# Set the reweight and length
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_osd_reweight_length = len(str(osd_information['stats']['reweight'])) + 1
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if _osd_reweight_length > osd_reweight_length:
osd_reweight_length = _osd_reweight_length
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# Set the pgs and length
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_osd_pgs_length = len(str(osd_information['stats']['pgs'])) + 1
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if _osd_pgs_length > osd_pgs_length:
osd_pgs_length = _osd_pgs_length
# Set the used/available/utlization%/variance and lengths
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_osd_used_length = len(osd_information['stats']['used']) + 1
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if _osd_used_length > osd_used_length:
osd_used_length = _osd_used_length
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_osd_free_length = len(osd_information['stats']['avail']) + 1
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if _osd_free_length > osd_free_length:
osd_free_length = _osd_free_length
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osd_util = round(osd_information['stats']['utilization'], 2)
_osd_util_length = len(str(osd_util)) + 1
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if _osd_util_length > osd_util_length:
osd_util_length = _osd_util_length
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osd_var = round(osd_information['stats']['var'], 2)
_osd_var_length = len(str(osd_var)) + 1
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if _osd_var_length > osd_var_length:
osd_var_length = _osd_var_length
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# Set the read/write IOPS/data and length
_osd_wrops_length = len(osd_information['stats']['wr_ops']) + 1
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if _osd_wrops_length > osd_wrops_length:
osd_wrops_length = _osd_wrops_length
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_osd_wrdata_length = len(osd_information['stats']['wr_data']) + 1
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if _osd_wrdata_length > osd_wrdata_length:
osd_wrdata_length = _osd_wrdata_length
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_osd_rdops_length = len(osd_information['stats']['rd_ops']) + 1
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if _osd_rdops_length > osd_rdops_length:
osd_rdops_length = _osd_rdops_length
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_osd_rddata_length = len(osd_information['stats']['rd_data']) + 1
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if _osd_rddata_length > osd_rddata_length:
osd_rddata_length = _osd_rddata_length
# Format the output header
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osd_list_output.append('{bold}\
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{osd_id: <{osd_id_length}} \
{osd_node: <{osd_node_length}} \
{osd_up: <{osd_up_length}} \
{osd_in: <{osd_in_length}} \
{osd_size: <{osd_size_length}} \
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{osd_pgs: <{osd_pgs_length}} \
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{osd_weight: <{osd_weight_length}} \
{osd_reweight: <{osd_reweight_length}} \
Sp: {osd_used: <{osd_used_length}} \
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{osd_free: <{osd_free_length}} \
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{osd_util: <{osd_util_length}} \
{osd_var: <{osd_var_length}} \
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Rd: {osd_rdops: <{osd_rdops_length}} \
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{osd_rddata: <{osd_rddata_length}} \
Wr: {osd_wrops: <{osd_wrops_length}} \
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{osd_wrdata: <{osd_wrdata_length}} \
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{end_bold}'.format(
bold=ansiprint.bold(),
end_bold=ansiprint.end(),
osd_id_length=osd_id_length,
osd_node_length=osd_node_length,
osd_up_length=osd_up_length,
osd_in_length=osd_in_length,
osd_size_length=osd_size_length,
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osd_pgs_length=osd_pgs_length,
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osd_weight_length=osd_weight_length,
osd_reweight_length=osd_reweight_length,
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osd_used_length=osd_used_length,
osd_free_length=osd_free_length,
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osd_util_length=osd_util_length,
osd_var_length=osd_var_length,
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osd_wrops_length=osd_wrops_length,
osd_wrdata_length=osd_wrdata_length,
osd_rdops_length=osd_rdops_length,
osd_rddata_length=osd_rddata_length,
osd_id='ID',
osd_node='Node',
osd_up='Up',
osd_in='In',
osd_size='Size',
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osd_pgs='PGs',
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osd_weight='Wt',
osd_reweight='ReWt',
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osd_used='Used',
osd_free='Free',
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osd_util='Util%',
osd_var='Var',
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osd_wrops='OPS',
osd_wrdata='Data',
osd_rdops='OPS',
osd_rddata='Data'
)
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)
for osd_information in osd_list:
try:
# If this happens, the node hasn't checked in fully yet, so just ignore it
if osd_information['stats']['node'] == '|':
continue
except KeyError:
continue
osd_up_flag, osd_up_colour, osd_in_flag, osd_in_colour = getOutputColoursOSD(osd_information)
osd_util = round(osd_information['stats']['utilization'], 2)
osd_var = round(osd_information['stats']['var'], 2)
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# Format the output header
osd_list_output.append('{bold}\
{osd_id: <{osd_id_length}} \
{osd_node: <{osd_node_length}} \
{osd_up_colour}{osd_up: <{osd_up_length}}{end_colour} \
{osd_in_colour}{osd_in: <{osd_in_length}}{end_colour} \
{osd_size: <{osd_size_length}} \
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{osd_pgs: <{osd_pgs_length}} \
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{osd_weight: <{osd_weight_length}} \
{osd_reweight: <{osd_reweight_length}} \
{osd_used: <{osd_used_length}} \
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{osd_free: <{osd_free_length}} \
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{osd_util: <{osd_util_length}} \
{osd_var: <{osd_var_length}} \
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{osd_rdops: <{osd_rdops_length}} \
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{osd_rddata: <{osd_rddata_length}} \
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{osd_wrops: <{osd_wrops_length}} \
{osd_wrdata: <{osd_wrdata_length}} \
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{end_bold}'.format(
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bold='',
end_bold='',
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end_colour=ansiprint.end(),
osd_id_length=osd_id_length,
osd_node_length=osd_node_length,
osd_up_length=osd_up_length,
osd_in_length=osd_in_length,
osd_size_length=osd_size_length,
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osd_pgs_length=osd_pgs_length,
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osd_weight_length=osd_weight_length,
osd_reweight_length=osd_reweight_length,
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osd_used_length=osd_used_length,
osd_free_length=osd_free_length,
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osd_util_length=osd_util_length,
osd_var_length=osd_var_length,
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osd_wrops_length=osd_wrops_length,
osd_wrdata_length=osd_wrdata_length,
osd_rdops_length=osd_rdops_length,
osd_rddata_length=osd_rddata_length,
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osd_id=osd_information['id'],
osd_node=osd_information['stats']['node'],
osd_up_colour=osd_up_colour,
osd_up=osd_up_flag,
osd_in_colour=osd_in_colour,
osd_in=osd_in_flag,
osd_size=osd_information['stats']['size'],
osd_pgs=osd_information['stats']['pgs'],
osd_weight=osd_information['stats']['weight'],
osd_reweight=osd_information['stats']['reweight'],
osd_used=osd_information['stats']['used'],
osd_free=osd_information['stats']['avail'],
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osd_util=osd_util,
osd_var=osd_var,
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osd_wrops=osd_information['stats']['wr_ops'],
osd_wrdata=osd_information['stats']['wr_data'],
osd_rdops=osd_information['stats']['rd_ops'],
osd_rddata=osd_information['stats']['rd_data']
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)
)
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click.echo('\n'.join(sorted(osd_list_output)))
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#
# Pool functions
#
def getPoolInformation(zk_conn, pool):
# Parse the stats data
pool_stats_raw = zkhandler.readdata(zk_conn, '/ceph/pools/{}/stats'.format(pool))
pool_stats = dict(json.loads(pool_stats_raw))
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pool_information = {
'name': pool,
'stats': pool_stats
}
return pool_information
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def add_pool(zk_conn, name, pgs, replcfg):
# Prepare the copies/mincopies variables
try:
copies, mincopies = replcfg.split(',')
copies = int(copies.replace('copies=', ''))
mincopies = int(mincopies.replace('mincopies=', ''))
except:
copies = None
mincopies = None
if not copies or not mincopies:
return False, 'ERROR: Replication configuration "{}" is not valid.'.format(replcfg)
# 1. Create the pool
retcode, stdout, stderr = common.run_os_command('ceph osd pool create {} {} replicated'.format(name, pgs))
if retcode:
return False, 'ERROR: Failed to create pool "{}" with {} PGs: {}'.format(name, pgs, stderr)
# 2. Set the size and minsize
retcode, stdout, stderr = common.run_os_command('ceph osd pool set {} size {}'.format(name, copies))
if retcode:
return False, 'ERROR: Failed to set pool "{}" size of {}: {}'.format(name, copies, stderr)
retcode, stdout, stderr = common.run_os_command('ceph osd pool set {} min_size {}'.format(name, mincopies))
if retcode:
return False, 'ERROR: Failed to set pool "{}" minimum size of {}: {}'.format(name, mincopies, stderr)
# 3. Enable RBD application
retcode, stdout, stderr = common.run_os_command('ceph osd pool application enable {} rbd'.format(name))
if retcode:
return False, 'ERROR: Failed to enable RBD application on pool "{}" : {}'.format(name, stderr)
# 4. Add the new pool to Zookeeper
zkhandler.writedata(zk_conn, {
'/ceph/pools/{}'.format(name): '',
'/ceph/pools/{}/pgs'.format(name): pgs,
'/ceph/pools/{}/stats'.format(name): '{}',
'/ceph/volumes/{}'.format(name): '',
'/ceph/snapshots/{}'.format(name): '',
})
return True, 'Created RBD pool "{}" with {} PGs'.format(name, pgs)
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def remove_pool(zk_conn, name):
if not verifyPool(zk_conn, name):
return False, 'ERROR: No pool with name "{}" is present in the cluster.'.format(name)
# 1. Remove pool volumes
for volume in zkhandler.listchildren(zk_conn, '/ceph/volumes/{}'.format(name)):
remove_volume(zk_conn, logger, name, volume)
# 2. Remove the pool
retcode, stdout, stderr = common.run_os_command('ceph osd pool rm {pool} {pool} --yes-i-really-really-mean-it'.format(pool=name))
if retcode:
return False, 'ERROR: Failed to remove pool "{}": {}'.format(name, stderr)
# 3. Delete pool from Zookeeper
zkhandler.deletekey(zk_conn, '/ceph/pools/{}'.format(name))
zkhandler.deletekey(zk_conn, '/ceph/volumes/{}'.format(name))
zkhandler.deletekey(zk_conn, '/ceph/snapshots/{}'.format(name))
return True, 'Removed RBD pool "{}" and all volumes.'.format(name)
def get_list_pool(zk_conn, limit, is_fuzzy=True):
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pool_list = []
full_pool_list = zkhandler.listchildren(zk_conn, '/ceph/pools')
if limit:
if not is_fuzzy:
limit = '^' + limit + '$'
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for pool in full_pool_list:
if limit:
try:
if re.match(limit, pool):
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pool_list.append(getPoolInformation(zk_conn, pool))
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except Exception as e:
return False, 'Regex Error: {}'.format(e)
else:
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pool_list.append(getPoolInformation(zk_conn, pool))
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return True, pool_list
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def format_list_pool(pool_list):
pool_list_output = []
pool_name_length = 5
pool_id_length = 3
pool_used_length = 5
pool_usedpct_length = 5
pool_free_length = 5
pool_num_objects_length = 6
pool_num_clones_length = 7
pool_num_copies_length = 7
pool_num_degraded_length = 9
pool_read_ops_length = 4
pool_read_data_length = 5
pool_write_ops_length = 4
pool_write_data_length = 5
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for pool_information in pool_list:
# Deal with the size to human readable
for datatype in ['free_bytes', 'used_bytes', 'write_bytes', 'read_bytes']:
databytes = pool_information['stats'][datatype]
databytes_formatted = format_bytes_tohuman(int(databytes))
pool_information['stats'][datatype] = databytes_formatted
for datatype in ['write_ops', 'read_ops']:
dataops = pool_information['stats'][datatype]
dataops_formatted = format_ops_tohuman(int(dataops))
pool_information['stats'][datatype] = dataops_formatted
for datatype in ['used_percent']:
datapct = pool_information['stats'][datatype]
datapct_formatted = format_pct_tohuman(float(datapct))
pool_information['stats'][datatype] = datapct_formatted
# Set the Pool name length
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_pool_name_length = len(pool_information['name']) + 1
if _pool_name_length > pool_name_length:
pool_name_length = _pool_name_length
# Set the id and length
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_pool_id_length = len(str(pool_information['stats']['id'])) + 1
if _pool_id_length > pool_id_length:
pool_id_length = _pool_id_length
# Set the used and length
_pool_used_length = len(str(pool_information['stats']['used_bytes'])) + 1
if _pool_used_length > pool_used_length:
pool_used_length = _pool_used_length
# Set the usedpct and length
_pool_usedpct_length = len(str(pool_information['stats']['used_percent'])) + 1
if _pool_usedpct_length > pool_usedpct_length:
pool_usedpct_length = _pool_usedpct_length
# Set the free and length
_pool_free_length = len(str(pool_information['stats']['free_bytes'])) + 1
if _pool_free_length > pool_free_length:
pool_free_length = _pool_free_length
# Set the num_objects and length
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_pool_num_objects_length = len(str(pool_information['stats']['num_objects'])) + 1
if _pool_num_objects_length > pool_num_objects_length:
pool_num_objects_length = _pool_num_objects_length
# Set the num_clones and length
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_pool_num_clones_length = len(str(pool_information['stats']['num_object_clones'])) + 1
if _pool_num_clones_length > pool_num_clones_length:
pool_num_clones_length = _pool_num_clones_length
# Set the num_copies and length
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_pool_num_copies_length = len(str(pool_information['stats']['num_object_copies'])) + 1
if _pool_num_copies_length > pool_num_copies_length:
pool_num_copies_length = _pool_num_copies_length
# Set the num_degraded and length
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_pool_num_degraded_length = len(str(pool_information['stats']['num_objects_degraded'])) + 1
if _pool_num_degraded_length > pool_num_degraded_length:
pool_num_degraded_length = _pool_num_degraded_length
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# Set the read/write IOPS/data and length
_pool_write_ops_length = len(str(pool_information['stats']['write_ops'])) + 1
if _pool_write_ops_length > pool_write_ops_length:
pool_write_ops_length = _pool_write_ops_length
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_pool_write_data_length = len(pool_information['stats']['write_bytes']) + 1
if _pool_write_data_length > pool_write_data_length:
pool_write_data_length = _pool_write_data_length
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_pool_read_ops_length = len(str(pool_information['stats']['read_ops'])) + 1
if _pool_read_ops_length > pool_read_ops_length:
pool_read_ops_length = _pool_read_ops_length
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_pool_read_data_length = len(pool_information['stats']['read_bytes']) + 1
if _pool_read_data_length > pool_read_data_length:
pool_read_data_length = _pool_read_data_length
# Format the output header
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pool_list_output.append('{bold}\
{pool_id: <{pool_id_length}} \
{pool_name: <{pool_name_length}} \
{pool_used: <{pool_used_length}} \
{pool_usedpct: <{pool_usedpct_length}} \
{pool_free: <{pool_free_length}} \
Obj: {pool_objects: <{pool_objects_length}} \
{pool_clones: <{pool_clones_length}} \
{pool_copies: <{pool_copies_length}} \
{pool_degraded: <{pool_degraded_length}} \
Rd: {pool_read_ops: <{pool_read_ops_length}} \
{pool_read_data: <{pool_read_data_length}} \
Wr: {pool_write_ops: <{pool_write_ops_length}} \
{pool_write_data: <{pool_write_data_length}} \
{end_bold}'.format(
bold=ansiprint.bold(),
end_bold=ansiprint.end(),
pool_id_length=pool_id_length,
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pool_name_length=pool_name_length,
pool_used_length=pool_used_length,
pool_usedpct_length=pool_usedpct_length,
pool_free_length=pool_free_length,
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pool_objects_length=pool_num_objects_length,
pool_clones_length=pool_num_clones_length,
pool_copies_length=pool_num_copies_length,
pool_degraded_length=pool_num_degraded_length,
pool_write_ops_length=pool_write_ops_length,
pool_write_data_length=pool_write_data_length,
pool_read_ops_length=pool_read_ops_length,
pool_read_data_length=pool_read_data_length,
pool_id='ID',
pool_name='Name',
pool_used='Used',
pool_usedpct='%',
pool_free='Free',
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pool_objects='Count',
pool_clones='Clones',
pool_copies='Copies',
pool_degraded='Degraded',
pool_write_ops='OPS',
pool_write_data='Data',
pool_read_ops='OPS',
pool_read_data='Data'
)
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)
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for pool_information in pool_list:
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# Format the output header
pool_list_output.append('{bold}\
{pool_id: <{pool_id_length}} \
{pool_name: <{pool_name_length}} \
{pool_used: <{pool_used_length}} \
{pool_usedpct: <{pool_usedpct_length}} \
{pool_free: <{pool_free_length}} \
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{pool_objects: <{pool_objects_length}} \
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{pool_clones: <{pool_clones_length}} \
{pool_copies: <{pool_copies_length}} \
{pool_degraded: <{pool_degraded_length}} \
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{pool_read_ops: <{pool_read_ops_length}} \
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{pool_read_data: <{pool_read_data_length}} \
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{pool_write_ops: <{pool_write_ops_length}} \
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{pool_write_data: <{pool_write_data_length}} \
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{end_bold}'.format(
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bold='',
end_bold='',
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pool_id_length=pool_id_length,
pool_name_length=pool_name_length,
pool_used_length=pool_used_length,
pool_usedpct_length=pool_usedpct_length,
pool_free_length=pool_free_length,
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pool_objects_length=pool_num_objects_length,
pool_clones_length=pool_num_clones_length,
pool_copies_length=pool_num_copies_length,
pool_degraded_length=pool_num_degraded_length,
pool_write_ops_length=pool_write_ops_length,
pool_write_data_length=pool_write_data_length,
pool_read_ops_length=pool_read_ops_length,
pool_read_data_length=pool_read_data_length,
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pool_id=pool_information['stats']['id'],
pool_name=pool_information['name'],
pool_used=pool_information['stats']['used_bytes'],
pool_usedpct=pool_information['stats']['used_percent'],
pool_free=pool_information['stats']['free_bytes'],
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pool_objects=pool_information['stats']['num_objects'],
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pool_clones=pool_information['stats']['num_object_clones'],
pool_copies=pool_information['stats']['num_object_copies'],
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pool_degraded=pool_information['stats']['num_objects_degraded'],
pool_write_ops=pool_information['stats']['write_ops'],
pool_write_data=pool_information['stats']['write_bytes'],
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pool_read_ops=pool_information['stats']['read_ops'],
pool_read_data=pool_information['stats']['read_bytes']
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)
)
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click.echo('\n'.join(sorted(pool_list_output)))
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#
# Volume functions
#
def getCephVolumes(zk_conn, pool):
volume_list = list()
if not pool:
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pool_list = zkhandler.listchildren(zk_conn, '/ceph/pools')
else:
pool_list = [ pool ]
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for pool_name in pool_list:
for volume_name in zkhandler.listchildren(zk_conn, '/ceph/volumes/{}'.format(pool_name)):
volume_list.append('{}/{}'.format(pool_name, volume_name))
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return volume_list
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def getVolumeInformation(zk_conn, pool, volume):
# Parse the stats data
volume_stats_raw = zkhandler.readdata(zk_conn, '/ceph/volumes/{}/{}/stats'.format(pool, volume))
volume_stats = dict(json.loads(volume_stats_raw))
# Format the size to something nicer
volume_stats['size'] = format_bytes_tohuman(volume_stats['size'])
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volume_information = {
'name': volume,
'pool': pool,
'stats': volume_stats
}
return volume_information
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def add_volume(zk_conn, pool, name, size):
# 1. Create the volume
retcode, stdout, stderr = common.run_os_command('rbd create --size {} --image-feature layering,exclusive-lock {}/{}'.format(size, pool, name))
if retcode:
return False, 'ERROR: Failed to create RBD volume "{}": {}'.format(name, stderr)
# 2. Get volume stats
retcode, stdout, stderr = common.run_os_command('rbd info --format json {}/{}'.format(pool, name))
volstats = stdout
# 3. Add the new volume to Zookeeper
zkhandler.writedata(zk_conn, {
'/ceph/volumes/{}/{}'.format(pool, name): '',
'/ceph/volumes/{}/{}/stats'.format(pool, name): volstats,
'/ceph/snapshots/{}/{}'.format(pool, name): '',
})
return True, 'Created RBD volume "{}/{}" ({}).'.format(pool, name, size)
def clone_volume(zk_conn, pool, name_src, name_new):
if not verifyVolume(zk_conn, pool, name_src):
return False, 'ERROR: No volume with name "{}" is present in pool "{}".'.format(name_src, pool)
# 1. Clone the volume
retcode, stdout, stderr = common.run_os_command('rbd copy {}/{} {}/{}'.format(pool, name_src, pool, name_new))
if retcode:
return False, 'ERROR: Failed to clone RBD volume "{}" to "{}" in pool "{}": {}'.format(name_src, new_name, pool, stderr)
# 2. Get volume stats
retcode, stdout, stderr = common.run_os_command('rbd info --format json {}/{}'.format(pool, name_new))
volstats = stdout
# 3. Add the new volume to Zookeeper
zkhandler.writedata(zk_conn, {
'/ceph/volumes/{}/{}'.format(pool, name_new): '',
'/ceph/volumes/{}/{}/stats'.format(pool, name_new): volstats,
'/ceph/snapshots/{}/{}'.format(pool, name_new): '',
})
return True, 'Cloned RBD volume "{}" to "{}" in pool "{}"'.format(name, name_new, pool)
def resize_volume(zk_conn, pool, name, size):
if not verifyVolume(zk_conn, pool, name):
return False, 'ERROR: No volume with name "{}" is present in pool "{}".'.format(name, pool)
# 1. Resize the volume
retcode, stdout, stderr = common.run_os_command('rbd resize --size {} {}/{}'.format(size, pool, name))
if retcode:
return False, 'ERROR: Failed to resize RBD volume "{}" to size "{}" in pool "{}": {}'.format(name, size, pool, stderr)
# 2. Get volume stats
retcode, stdout, stderr = common.run_os_command('rbd info --format json {}/{}'.format(pool, name))
volstats = stdout
# 3. Add the new volume to Zookeeper
zkhandler.writedata(zk_conn, {
'/ceph/volumes/{}/{}'.format(pool, name): '',
'/ceph/volumes/{}/{}/stats'.format(pool, name): volstats,
'/ceph/snapshots/{}/{}'.format(pool, name): '',
})
return True, 'Resized RBD volume "{}" to size "{}" in pool "{}".'.format(name, size, pool)
def rename_volume(zk_conn, pool, name, new_name):
if not verifyVolume(zk_conn, pool, name):
return False, 'ERROR: No volume with name "{}" is present in pool "{}".'.format(name, pool)
# 1. Rename the volume
retcode, stdout, stderr = common.run_os_command('rbd rename {}/{} {}'.format(pool, name, new_name))
if retcode:
return False, 'ERROR: Failed to rename volume "{}" to "{}" in pool "{}": {}'.format(name, new_name, pool, stderr)
# 2. Rename the volume in Zookeeper
zkhandler.renamekey(zk_conn, {
'/ceph/volumes/{}/{}'.format(pool, name): '/ceph/volumes/{}/{}'.format(pool, new_name),
'/ceph/snapshots/{}/{}'.format(pool, name): '/ceph/snapshots/{}/{}'.format(pool, new_name),
})
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# 3. Get volume stats
retcode, stdout, stderr = common.run_os_command('rbd info --format json {}/{}'.format(pool, new_name))
volstats = stdout
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# 4. Update the volume stats in Zookeeper
zkhandler.writedata(zk_conn, {
'/ceph/volumes/{}/{}/stats'.format(pool, new_name): volstats,
})
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return True, 'Renamed RBD volume "{}" to "{}" in pool "{}".'.format(name, new_name, pool)
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def remove_volume(zk_conn, pool, name):
if not verifyVolume(zk_conn, pool, name):
return False, 'ERROR: No volume with name "{}" is present in pool "{}".'.format(name, pool)
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# 1. Remove volume snapshots
for snapshot in zkhandler.listchildren(zk_conn, '/ceph/snapshots/{}/{}'.format(pool, name)):
remove_snapshot(zk_conn, logger, pool, volume, snapshot)
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# 2. Remove the volume
retcode, stdout, stderr = common.run_os_command('rbd rm {}/{}'.format(pool, name))
if retcode:
return False, 'ERROR: Failed to remove RBD volume "{}" in pool "{}": {}'.format(name, pool, stderr)
# 3. Delete volume from Zookeeper
zkhandler.deletekey(zk_conn, '/ceph/volumes/{}/{}'.format(pool, name))
zkhandler.deletekey(zk_conn, '/ceph/snapshots/{}/{}'.format(pool, name))
return True, 'Removed RBD volume "{}" in pool "{}".'.format(name, pool)
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def map_volume(zk_conn, pool, name):
if not verifyVolume(zk_conn, pool, name):
return False, 'ERROR: No volume with name "{}" is present in pool "{}".'.format(name, pool)
# 1. Map the volume onto the local system
retcode, stdout, stderr = common.run_os_command('rbd map {}/{}'.format(pool, name))
if retcode:
return False, 'ERROR: Failed to map RBD volume "{}" in pool "{}": {}'.format(name, pool, stderr)
# 2. Calculate the absolute path to the mapped volume
mapped_volume = '/dev/rbd/{}/{}'.format(pool, name)
# 3. Ensure the volume exists
if not os.path.exists(mapped_volume):
return False, 'ERROR: Mapped volume not found at expected location "{}".'.format(mapped_volume)
return True, mapped_volume
def unmap_volume(zk_conn, pool, name):
if not verifyVolume(zk_conn, pool, name):
return False, 'ERROR: No volume with name "{}" is present in pool "{}".'.format(name, pool)
mapped_volume = '/dev/rbd/{}/{}'.format(pool, name)
# 1. Ensure the volume exists
if not os.path.exists(mapped_volume):
return False, 'ERROR: Mapped volume not found at expected location "{}".'.format(mapped_volume)
# 2. Unap the volume
retcode, stdout, stderr = common.run_os_command('rbd unmap {}'.format(mapped_volume))
if retcode:
return False, 'ERROR: Failed to unmap RBD volume at "{}": {}'.format(mapped_volume, stderr)
return True, 'Unmapped RBD volume at "{}".'.format(mapped_volume)
def get_list_volume(zk_conn, pool, limit, is_fuzzy=True):
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volume_list = []
if pool and not verifyPool(zk_conn, pool):
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return False, 'ERROR: No pool with name "{}" is present in the cluster.'.format(name)
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full_volume_list = getCephVolumes(zk_conn, pool)
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if limit:
if not is_fuzzy:
limit = '^' + limit + '$'
else:
# Implicitly assume fuzzy limits
if not re.match('\^.*', limit):
limit = '.*' + limit
if not re.match('.*\$', limit):
limit = limit + '.*'
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for volume in full_volume_list:
pool_name, volume_name = volume.split('/')
if limit:
try:
if re.match(limit, volume_name):
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volume_list.append(getVolumeInformation(zk_conn, pool_name, volume_name))
except Exception as e:
return False, 'Regex Error: {}'.format(e)
else:
volume_list.append(getVolumeInformation(zk_conn, pool_name, volume_name))
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return True, volume_list
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def format_list_volume(volume_list):
volume_list_output = []
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volume_name_length = 5
volume_pool_length = 5
volume_size_length = 5
volume_objects_length = 8
volume_order_length = 6
volume_format_length = 7
volume_features_length = 10
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for volume_information in volume_list:
# Set the Volume name length
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_volume_name_length = len(volume_information['name']) + 1
if _volume_name_length > volume_name_length:
volume_name_length = _volume_name_length
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# Set the Volume pool length
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_volume_pool_length = len(volume_information['pool']) + 1
if _volume_pool_length > volume_pool_length:
volume_pool_length = _volume_pool_length
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# Set the size and length
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_volume_size_length = len(str(volume_information['stats']['size'])) + 1
if _volume_size_length > volume_size_length:
volume_size_length = _volume_size_length
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# Set the num_objects and length
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_volume_objects_length = len(str(volume_information['stats']['objects'])) + 1
if _volume_objects_length > volume_objects_length:
volume_objects_length = _volume_objects_length
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# Set the order and length
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_volume_order_length = len(str(volume_information['stats']['order'])) + 1
if _volume_order_length > volume_order_length:
volume_order_length = _volume_order_length
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# Set the format and length
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_volume_format_length = len(str(volume_information['stats']['format'])) + 1
if _volume_format_length > volume_format_length:
volume_format_length = _volume_format_length
# Set the features and length
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_volume_features_length = len(str(','.join(volume_information['stats']['features']))) + 1
if _volume_features_length > volume_features_length:
volume_features_length = _volume_features_length
# Format the output header
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volume_list_output.append('{bold}\
{volume_name: <{volume_name_length}} \
{volume_pool: <{volume_pool_length}} \
{volume_size: <{volume_size_length}} \
{volume_objects: <{volume_objects_length}} \
{volume_order: <{volume_order_length}} \
{volume_format: <{volume_format_length}} \
{volume_features: <{volume_features_length}} \
{end_bold}'.format(
bold=ansiprint.bold(),
end_bold=ansiprint.end(),
volume_name_length=volume_name_length,
volume_pool_length=volume_pool_length,
volume_size_length=volume_size_length,
volume_objects_length=volume_objects_length,
volume_order_length=volume_order_length,
volume_format_length=volume_format_length,
volume_features_length=volume_features_length,
volume_name='Name',
volume_pool='Pool',
volume_size='Size',
volume_objects='Objects',
volume_order='Order',
volume_format='Format',
volume_features='Features',
)
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)
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for volume_information in volume_list:
volume_list_output.append('{bold}\
{volume_name: <{volume_name_length}} \
{volume_pool: <{volume_pool_length}} \
{volume_size: <{volume_size_length}} \
{volume_objects: <{volume_objects_length}} \
{volume_order: <{volume_order_length}} \
{volume_format: <{volume_format_length}} \
{volume_features: <{volume_features_length}} \
{end_bold}'.format(
bold='',
end_bold='',
volume_name_length=volume_name_length,
volume_pool_length=volume_pool_length,
volume_size_length=volume_size_length,
volume_objects_length=volume_objects_length,
volume_order_length=volume_order_length,
volume_format_length=volume_format_length,
volume_features_length=volume_features_length,
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volume_name=volume_information['name'],
volume_pool=volume_information['pool'],
volume_size=volume_information['stats']['size'],
volume_objects=volume_information['stats']['objects'],
volume_order=volume_information['stats']['order'],
volume_format=volume_information['stats']['format'],
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volume_features=','.join(volume_information['stats']['features']),
)
)
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click.echo('\n'.join(sorted(volume_list_output)))
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#
# Snapshot functions
#
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def getCephSnapshots(zk_conn, pool, volume):
snapshot_list = list()
volume_list = list()
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volume_list = getCephVolumes(zk_conn, pool)
if volume:
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for volume_entry in volume_list:
volume_pool, volume_name = volume_entry.split('/')
if volume_name == volume:
volume_list = [ '{}/{}'.format(volume_pool, volume_name) ]
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for volume_entry in volume_list:
for snapshot_name in zkhandler.listchildren(zk_conn, '/ceph/snapshots/{}'.format(volume_entry)):
snapshot_list.append('{}@{}'.format(volume_entry, snapshot_name))
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return snapshot_list
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def add_snapshot(zk_conn, pool, volume, name):
if not verifyVolume(zk_conn, pool, volume):
return False, 'ERROR: No volume with name "{}" is present in pool "{}".'.format(volume, pool)
# 1. Create the snapshot
retcode, stdout, stderr = common.run_os_command('rbd snap create {}/{}@{}'.format(pool, volume, name))
if retcode:
return False, 'ERROR: Failed to create RBD snapshot "{}" of volume "{}" in pool "{}": {}'.format(name, volume, pool, stderr)
# 2. Add the snapshot to Zookeeper
zkhandler.writedata(zk_conn, {
'/ceph/snapshots/{}/{}/{}'.format(pool, volume, name): '',
'/ceph/snapshots/{}/{}/{}/stats'.format(pool, volume, name): '{}'
})
return True, 'Created RBD snapshot "{}" of volume "{}" in pool "{}".'.format(name, volume, pool)
def rename_snapshot(zk_conn, pool, volume, name, new_name):
if not verifyVolume(zk_conn, pool, volume):
return False, 'ERROR: No volume with name "{}" is present in pool "{}".'.format(volume, pool)
if not verifySnapshot(zk_conn, pool, volume, name):
return False, 'ERROR: No snapshot with name "{}" is present for volume "{}" in pool "{}".'.format(name, volume, pool)
# 1. Rename the snapshot
retcode, stdout, stderr = common.run_os_command('rbd snap rename {}/{}@{} {}'.format(pool, volume, name, new_name))
if retcode:
return False, 'ERROR: Failed to rename RBD snapshot "{}" to "{}" for volume "{}" in pool "{}": {}'.format(name, new_name, volume, pool, stderr)
# 2. Rename the snapshot in ZK
zkhandler.renamekey(zk_conn, {
'/ceph/snapshots/{}/{}/{}'.format(pool, volume, name): '/ceph/snapshots/{}/{}/{}'.format(pool, volume, new_name)
})
return True, 'Renamed RBD snapshot "{}" to "{}" for volume "{}" in pool "{}".'.format(name, new_name, volume, pool)
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def remove_snapshot(zk_conn, pool, volume, name):
if not verifyVolume(zk_conn, pool, volume):
return False, 'ERROR: No volume with name "{}" is present in pool "{}".'.format(volume, pool)
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if not verifySnapshot(zk_conn, pool, volume, name):
return False, 'ERROR: No snapshot with name "{}" is present of volume {} in pool {}.'.format(name, volume, pool)
# 1. Remove the snapshot
retcode, stdout, stderr = common.run_os_command('rbd snap rm {}/{}@{}'.format(pool, volume, name))
if retcode:
return False, 'Failed to remove RBD snapshot "{}" of volume "{}" in pool "{}": {}'.format(name, volume, pool, stderr)
# 2. Delete snapshot from Zookeeper
zkhandler.deletekey(zk_conn, '/ceph/snapshots/{}/{}/{}'.format(pool, volume, name))
return True, 'Removed RBD snapshot "{}" of volume "{}" in pool "{}".'.format(name, volume, pool)
def get_list_snapshot(zk_conn, pool, volume, limit, is_fuzzy=True):
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snapshot_list = []
if pool and not verifyPool(zk_conn, pool):
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return False, 'ERROR: No pool with name "{}" is present in the cluster.'.format(pool)
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if volume and not verifyPool(zk_conn, volume):
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return False, 'ERROR: No volume with name "{}" is present in the cluster.'.format(volume)
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full_snapshot_list = getCephSnapshots(zk_conn, pool, volume)
if is_fuzzy and limit:
# Implicitly assume fuzzy limits
if not re.match('\^.*', limit):
limit = '.*' + limit
if not re.match('.*\$', limit):
limit = limit + '.*'
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for snapshot in full_snapshot_list:
volume, snapshot_name = snapshot.split('@')
pool_name, volume_name = volume.split('/')
if limit:
try:
if re.match(limit, snapshot_name):
snapshot_list.append({'pool': pool_name, 'volume': volume_name, 'snapshot': snapshot_name})
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except Exception as e:
return False, 'Regex Error: {}'.format(e)
else:
snapshot_list.append({'pool': pool_name, 'volume': volume_name, 'snapshot': snapshot_name})
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return True, snapshot_list
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def format_list_snapshot(snapshot_list):
snapshot_list_output = []
snapshot_name_length = 5
snapshot_volume_length = 7
snapshot_pool_length = 5
for snapshot in snapshot_list:
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volume, snapshot_name = snapshot.split('@')
snapshot_pool, snapshot_volume = volume.split('/')
# Set the Snapshot name length
_snapshot_name_length = len(snapshot_name) + 1
if _snapshot_name_length > snapshot_name_length:
snapshot_name_length = _snapshot_name_length
# Set the Snapshot volume length
_snapshot_volume_length = len(snapshot_volume) + 1
if _snapshot_volume_length > snapshot_volume_length:
snapshot_volume_length = _snapshot_volume_length
# Set the Snapshot pool length
_snapshot_pool_length = len(snapshot_pool) + 1
if _snapshot_pool_length > snapshot_pool_length:
snapshot_pool_length = _snapshot_pool_length
# Format the output header
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snapshot_list_output.append('{bold}\
{snapshot_name: <{snapshot_name_length}} \
{snapshot_volume: <{snapshot_volume_length}} \
{snapshot_pool: <{snapshot_pool_length}} \
{end_bold}'.format(
bold=ansiprint.bold(),
end_bold=ansiprint.end(),
snapshot_name_length=snapshot_name_length,
snapshot_volume_length=snapshot_volume_length,
snapshot_pool_length=snapshot_pool_length,
snapshot_name='Name',
snapshot_volume='Volume',
snapshot_pool='Pool',
)
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)
for snapshot in snapshot_list:
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volume, snapshot_name = snapshot.split('@')
snapshot_pool, snapshot_volume = volume.split('/')
snapshot_list_output.append('{bold}\
{snapshot_name: <{snapshot_name_length}} \
{snapshot_volume: <{snapshot_volume_length}} \
{snapshot_pool: <{snapshot_pool_length}} \
{end_bold}'.format(
bold='',
end_bold='',
snapshot_name_length=snapshot_name_length,
snapshot_volume_length=snapshot_volume_length,
snapshot_pool_length=snapshot_pool_length,
snapshot_name=snapshot_name,
snapshot_volume=snapshot_volume,
snapshot_pool=snapshot_pool,
)
)
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click.echo('\n'.join(sorted(snapshot_list_output)))