pvc/daemon-common/ceph.py

785 lines
28 KiB
Python
Raw Permalink Normal View History

2019-09-26 14:07:52 -04:00
#!/usr/bin/env python3
2018-10-27 18:11:58 -04:00
# ceph.py - PVC client function library, Ceph cluster fuctions
# Part of the Parallel Virtual Cluster (PVC) system
#
2020-01-08 19:38:02 -05:00
# Copyright (C) 2018-2020 Joshua M. Boniface <joshua@boniface.me>
2018-10-27 18:11:58 -04:00
#
# 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
2018-10-27 18:11:58 -04:00
import re
2018-10-31 23:38:17 -04:00
import json
import time
2018-10-31 23:38:17 -04:00
import math
2018-10-27 18:11:58 -04:00
import daemon_lib.vm as vm
import daemon_lib.zkhandler as zkhandler
import daemon_lib.common as common
2018-10-27 18:11:58 -04:00
2018-10-27 18:11:58 -04:00
#
# Supplemental functions
#
2018-10-31 23:38:17 -04:00
# 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
2018-10-31 23:38:17 -04:00
# 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
# Matrix of human-to-byte values
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
}
# Matrix of human-to-metric values
ops_unit_matrix = {
'': 1,
'K': 1000,
'M': 1000 * 1000,
'G': 1000 * 1000 * 1000,
'T': 1000 * 1000 * 1000 * 1000,
'P': 1000 * 1000 * 1000 * 1000 * 1000
}
# Format byte sizes to/from human-readable units
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):
2019-06-21 10:18:35 -04:00
# Trim off human-readable character
2020-02-17 12:32:20 -05:00
dataunit = str(datahuman)[-1]
datasize = int(str(datahuman)[:-1])
if not re.match(r'[A-Z]', dataunit):
dataunit = 'B'
datasize = int(datahuman)
databytes = datasize * byte_unit_matrix[dataunit]
2019-06-21 10:18:35 -04:00
return '{}B'.format(databytes)
# Format ops sizes to/from human-readable units
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
2018-10-30 09:17:32 -04:00
#
# Status functions
2018-10-30 09:17:32 -04:00
#
def get_status(zk_conn):
2019-07-05 00:29:47 -04:00
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 = {
2019-07-08 10:56:33 -04:00
'type': 'status',
2019-07-05 00:29:47 -04:00
'primary_node': primary_node,
2019-07-08 10:56:33 -04:00
'ceph_data': ceph_status
}
return True, status_data
def get_util(zk_conn):
2019-07-08 10:56:33 -04:00
primary_node = zkhandler.readdata(zk_conn, '/primary_node')
ceph_df = zkhandler.readdata(zk_conn, '/ceph/util').rstrip()
2019-07-08 10:56:33 -04:00
# Create a data structure for the information
status_data = {
'type': 'utilization',
'primary_node': primary_node,
'ceph_data': ceph_df
2019-07-05 00:29:47 -04:00
}
2019-07-05 00:44:40 -04:00
return True, status_data
2019-07-26 15:10:47 -04:00
#
# OSD functions
#
2018-10-30 09:17:32 -04:00
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
2018-10-30 09:17:32 -04:00
def getOSDInformation(zk_conn, osd_id):
# Parse the stats data
osd_stats_raw = zkhandler.readdata(zk_conn, '/ceph/osds/{}/stats'.format(osd_id))
2018-10-31 23:38:17 -04:00
osd_stats = dict(json.loads(osd_stats_raw))
2018-10-30 09:17:32 -04:00
2019-07-05 00:29:47 -04:00
osd_information = {
'id': osd_id,
'stats': osd_stats
}
return osd_information
# OSD addition and removal uses the /cmd/ceph pipe
# These actions must occur on the specific node they reference
2019-07-05 00:29:47 -04:00
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)
2019-07-05 00:29:47 -04:00
# Tell the cluster to create a new OSD for the host
2019-07-26 15:10:47 -04:00
add_osd_string = 'osd_add {},{},{}'.format(node, device, weight)
zkhandler.writedata(zk_conn, {'/cmd/ceph': add_osd_string})
2019-07-05 00:29:47 -04:00
# 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')
2019-07-05 00:29:47 -04:00
with lock:
try:
result = zkhandler.readdata(zk_conn, '/cmd/ceph').split()[0]
2019-07-05 00:29:47 -04:00
if result == 'success-osd_add':
2019-07-08 22:31:24 -04:00
message = 'Created new OSD with block device "{}" on node "{}".'.format(device, node)
2019-07-05 00:29:47 -04:00
success = True
else:
message = 'ERROR: Failed to create new OSD; check node logs for details.'
success = False
except Exception:
2019-07-05 00:29:47 -04:00
message = 'ERROR: Command ignored by node.'
success = False
# Acquire a write lock to ensure things go smoothly
lock = zkhandler.writelock(zk_conn, '/cmd/ceph')
2019-07-05 00:29:47 -04:00
with lock:
time.sleep(0.5)
zkhandler.writedata(zk_conn, {'/cmd/ceph': ''})
2019-07-05 00:29:47 -04:00
return success, message
2019-07-05 00:29:47 -04:00
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})
2019-07-05 00:29:47 -04:00
# 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')
2019-07-05 00:29:47 -04:00
with lock:
try:
result = zkhandler.readdata(zk_conn, '/cmd/ceph').split()[0]
2019-07-05 00:29:47 -04:00
if result == 'success-osd_remove':
message = 'Removed OSD "{}" from the cluster.'.format(osd_id)
2019-07-05 00:29:47 -04:00
success = True
else:
message = 'ERROR: Failed to remove OSD; check node logs for details.'
success = False
except Exception:
2019-07-05 00:29:47 -04:00
success = False
message = 'ERROR Command ignored by node.'
2018-10-31 23:38:17 -04:00
2019-07-05 00:29:47 -04:00
# Acquire a write lock to ensure things go smoothly
lock = zkhandler.writelock(zk_conn, '/cmd/ceph')
2019-07-05 00:29:47 -04:00
with lock:
time.sleep(0.5)
zkhandler.writedata(zk_conn, {'/cmd/ceph': ''})
2019-07-05 00:29:47 -04:00
return success, message
2019-07-05 00:29:47 -04:00
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)
2019-07-05 00:29:47 -04:00
return True, 'Set OSD {} online.'.format(osd_id)
2019-07-05 00:29:47 -04:00
2019-07-05 00:29:47 -04:00
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)
2019-07-05 00:29:47 -04:00
return True, 'Set OSD {} offline.'.format(osd_id)
2019-07-05 00:29:47 -04:00
2019-07-05 00:29:47 -04:00
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)
2019-07-05 00:29:47 -04:00
return True, 'Set OSD property "{}".'.format(option)
2019-07-05 00:29:47 -04:00
2019-07-05 00:29:47 -04:00
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)
2019-07-05 00:29:47 -04:00
return True, 'Unset OSD property "{}".'.format(option)
2019-07-05 00:29:47 -04:00
def get_list_osd(zk_conn, limit, is_fuzzy=True):
2019-07-05 00:29:47 -04:00
osd_list = []
full_osd_list = zkhandler.listchildren(zk_conn, '/ceph/osds')
if is_fuzzy and limit:
# Implicitly assume fuzzy limits
if not re.match(r'\^.*', limit):
limit = '.*' + limit
if not re.match(r'.*\$', limit):
limit = limit + '.*'
2019-07-05 00:29:47 -04:00
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, sorted(osd_list, key=lambda x: int(x['id']))
2019-07-05 00:29:47 -04:00
2018-10-31 23:38:17 -04:00
2019-07-05 00:29:47 -04:00
#
# 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))
2018-10-31 23:38:17 -04:00
2019-07-05 00:29:47 -04:00
pool_information = {
'name': pool,
'stats': pool_stats
}
return pool_information
2018-10-31 23:38:17 -04:00
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 Exception:
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)
2019-07-05 00:29:47 -04:00
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)):
2020-11-07 13:36:28 -05:00
remove_volume(zk_conn, 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):
2019-07-05 00:29:47 -04:00
pool_list = []
full_pool_list = zkhandler.listchildren(zk_conn, '/ceph/pools')
if limit:
if not is_fuzzy:
limit = '^' + limit + '$'
2019-07-05 00:29:47 -04:00
for pool in full_pool_list:
if limit:
try:
if re.match(limit, pool):
2019-07-08 21:40:06 -04:00
pool_list.append(getPoolInformation(zk_conn, pool))
2019-07-05 00:29:47 -04:00
except Exception as e:
return False, 'Regex Error: {}'.format(e)
else:
2019-07-08 21:40:06 -04:00
pool_list.append(getPoolInformation(zk_conn, pool))
return True, sorted(pool_list, key=lambda x: int(x['stats']['id']))
2018-10-31 23:38:17 -04:00
2019-07-05 00:29:47 -04:00
#
# Volume functions
#
def getCephVolumes(zk_conn, pool):
volume_list = list()
if not pool:
2019-07-05 00:29:47 -04:00
pool_list = zkhandler.listchildren(zk_conn, '/ceph/pools')
else:
2020-11-07 13:02:54 -05:00
pool_list = [pool]
2018-10-31 23:38:17 -04:00
2019-07-05 00:29:47 -04:00
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))
2019-07-05 00:29:47 -04:00
return volume_list
2018-10-28 22:15:25 -04:00
2019-07-05 00:29:47 -04:00
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'])
2019-07-05 00:29:47 -04:00
volume_information = {
'name': volume,
'pool': pool,
'stats': volume_stats
}
return volume_information
2019-07-05 00:29:47 -04:00
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:
2020-11-07 13:36:56 -05:00
return False, 'ERROR: Failed to clone RBD volume "{}" to "{}" in pool "{}": {}'.format(name_src, name_new, 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): '',
})
2020-11-07 13:37:24 -05:00
return True, 'Cloned RBD volume "{}" to "{}" in pool "{}"'.format(name_src, 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)
# 2a. Determine the node running this VM if applicable
active_node = None
volume_vm_name = name.split('_')[0]
retcode, vm_info = vm.get_info(zk_conn, volume_vm_name)
if retcode:
for disk in vm_info['disks']:
# This block device is present in this VM so we can continue
if disk['name'] == '{}/{}'.format(pool, name):
active_node = vm_info['node']
volume_id = disk['dev']
# 2b. Perform a live resize in libvirt if the VM is running
if active_node is not None and vm_info.get('state', '') == 'start':
import libvirt
# Run the libvirt command against the target host
try:
dest_lv = 'qemu+tcp://{}/system'.format(active_node)
target_lv_conn = libvirt.open(dest_lv)
target_vm_conn = target_lv_conn.lookupByName(vm_info['name'])
if target_vm_conn:
target_vm_conn.blockResize(volume_id, int(format_bytes_fromhuman(size)[:-1]), libvirt.VIR_DOMAIN_BLOCK_RESIZE_BYTES)
target_lv_conn.close()
except Exception:
pass
# 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)
})
2018-10-30 09:17:32 -04:00
# 3. Get volume stats
retcode, stdout, stderr = common.run_os_command('rbd info --format json {}/{}'.format(pool, new_name))
volstats = stdout
2019-10-10 14:09:07 -04:00
# 4. Update the volume stats in Zookeeper
zkhandler.writedata(zk_conn, {
'/ceph/volumes/{}/{}/stats'.format(pool, new_name): volstats,
})
2019-10-10 14:09:07 -04:00
return True, 'Renamed RBD volume "{}" to "{}" in pool "{}".'.format(name, new_name, pool)
2019-10-10 14:09:07 -04:00
2019-07-05 00:29:47 -04:00
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)
2018-11-01 22:00:59 -04:00
# 1. Remove volume snapshots
for snapshot in zkhandler.listchildren(zk_conn, '/ceph/snapshots/{}/{}'.format(pool, name)):
2020-11-07 13:37:55 -05:00
remove_snapshot(zk_conn, pool, name, snapshot)
2018-11-01 22:00:59 -04:00
# 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)
2018-11-01 22:00:59 -04:00
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):
2019-07-05 00:29:47 -04:00
volume_list = []
if pool and not verifyPool(zk_conn, pool):
2020-11-07 13:38:16 -05:00
return False, 'ERROR: No pool with name "{}" is present in the cluster.'.format(pool)
2018-11-01 22:00:59 -04:00
2019-07-05 00:29:47 -04:00
full_volume_list = getCephVolumes(zk_conn, pool)
2018-11-01 22:00:59 -04:00
if limit:
if not is_fuzzy:
limit = '^' + limit + '$'
else:
# Implicitly assume fuzzy limits
if not re.match(r'\^.*', limit):
limit = '.*' + limit
if not re.match(r'.*\$', limit):
limit = limit + '.*'
2019-07-26 15:10:47 -04:00
2019-07-05 00:29:47 -04:00
for volume in full_volume_list:
pool_name, volume_name = volume.split('/')
if limit:
try:
if re.match(limit, volume_name):
2019-07-05 00:29:47 -04:00
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))
2018-11-01 22:00:59 -04:00
return True, sorted(volume_list, key=lambda x: str(x['name']))
2018-11-01 22:00:59 -04:00
2018-10-31 23:38:17 -04:00
2019-07-05 00:29:47 -04:00
#
# Snapshot functions
#
def getCephSnapshots(zk_conn, pool, volume):
snapshot_list = list()
volume_list = list()
2018-10-31 23:38:17 -04:00
2019-07-05 00:29:47 -04:00
volume_list = getCephVolumes(zk_conn, pool)
if volume:
2019-07-05 00:29:47 -04:00
for volume_entry in volume_list:
volume_pool, volume_name = volume_entry.split('/')
if volume_name == volume:
2020-11-07 13:02:54 -05:00
volume_list = ['{}/{}'.format(volume_pool, volume_name)]
2018-10-31 23:38:17 -04:00
2019-07-05 00:29:47 -04:00
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))
2018-10-31 23:38:17 -04:00
2019-07-05 00:29:47 -04:00
return snapshot_list
2018-10-31 23:38:17 -04:00
2019-07-05 00:29:47 -04:00
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)
2019-07-05 00:29:47 -04:00
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)
2019-07-05 00:29:47 -04:00
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):
2019-07-05 00:29:47 -04:00
snapshot_list = []
if pool and not verifyPool(zk_conn, pool):
2019-07-05 00:29:47 -04:00
return False, 'ERROR: No pool with name "{}" is present in the cluster.'.format(pool)
2019-06-19 15:32:32 -04:00
if volume and not verifyPool(zk_conn, volume):
2019-07-05 00:29:47 -04:00
return False, 'ERROR: No volume with name "{}" is present in the cluster.'.format(volume)
2019-07-05 00:29:47 -04:00
full_snapshot_list = getCephSnapshots(zk_conn, pool, volume)
if is_fuzzy and limit:
# Implicitly assume fuzzy limits
if not re.match(r'\^.*', limit):
limit = '.*' + limit
if not re.match(r'.*\$', limit):
limit = limit + '.*'
2019-07-05 00:29:47 -04:00
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})
2019-07-05 00:29:47 -04:00
except Exception as e:
return False, 'Regex Error: {}'.format(e)
else:
snapshot_list.append({'pool': pool_name, 'volume': volume_name, 'snapshot': snapshot_name})
return True, sorted(snapshot_list, key=lambda x: int(x['id']))