pvc/node-daemon/pvcnoded/objects/CephInstance.py

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#!/usr/bin/env python3
# CephInstance.py - Class implementing a PVC node Ceph instance
# Part of the Parallel Virtual Cluster (PVC) system
#
2022-10-06 11:55:27 -04:00
# Copyright (C) 2018-2022 Joshua M. Boniface <joshua@boniface.me>
#
# 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, version 3.
#
# 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 time
import json
import daemon_lib.common as common
from distutils.util import strtobool
from re import search, match, sub
def get_detect_device(detect_string):
"""
Parses a "detect:" string into a normalized block device path using lsscsi.
A detect string is formatted "detect:<NAME>:<SIZE>:<ID>", where
NAME is some unique identifier in lsscsi, SIZE is a human-readable
size value to within +/- 3% of the real size of the device, and
ID is the Nth (0-indexed) matching entry of that NAME and SIZE.
"""
_, name, size, idd = detect_string.split(":")
if _ != "detect":
return None
retcode, stdout, stderr = common.run_os_command("lsscsi -s")
if retcode:
print(f"Failed to run lsscsi: {stderr}")
return None
# Get valid lines
lsscsi_lines_raw = stdout.split("\n")
lsscsi_lines = list()
for line in lsscsi_lines_raw:
if not line:
continue
split_line = line.split()
if split_line[1] != "disk":
continue
lsscsi_lines.append(line)
# Handle size determination (+/- 3%)
lsscsi_sizes = set()
for line in lsscsi_lines:
lsscsi_sizes.add(split_line[-1])
for l_size in lsscsi_sizes:
b_size = float(sub(r"\D.", "", size))
t_size = float(sub(r"\D.", "", l_size))
plusthreepct = t_size * 1.03
minusthreepct = t_size * 0.97
if b_size > minusthreepct and b_size < plusthreepct:
size = l_size
break
blockdev = None
matches = list()
for idx, line in enumerate(lsscsi_lines):
# Skip non-disk entries
if line.split()[1] != "disk":
continue
# Skip if name is not contained in the line (case-insensitive)
if name.lower() not in line.lower():
continue
# Skip if the size does not match
if size != line.split()[-1]:
continue
# Get our blockdev and append to the list
matches.append(line.split()[-2])
blockdev = None
# Find the blockdev at index {idd}
for idx, _blockdev in enumerate(matches):
if int(idx) == int(idd):
blockdev = _blockdev
break
return blockdev
class CephOSDInstance(object):
def __init__(self, zkhandler, logger, this_node, osd_id):
self.zkhandler = zkhandler
self.logger = logger
self.this_node = this_node
self.osd_id = osd_id
self.node = None
self.device = None
self.vg = None
self.lv = None
self.stats = dict()
@self.zkhandler.zk_conn.DataWatch(
self.zkhandler.schema.path("osd.node", self.osd_id)
)
def watch_osd_node(data, stat, event=""):
if event and event.type == "DELETED":
# The key has been deleted after existing before; terminate this watcher
# because this class instance is about to be reaped in Daemon.py
return False
try:
data = data.decode("ascii")
except AttributeError:
data = ""
if data and data != self.node:
self.node = data
@self.zkhandler.zk_conn.DataWatch(
self.zkhandler.schema.path("osd.stats", self.osd_id)
)
def watch_osd_stats(data, stat, event=""):
if event and event.type == "DELETED":
# The key has been deleted after existing before; terminate this watcher
# because this class instance is about to be reaped in Daemon.py
return False
try:
data = data.decode("ascii")
except AttributeError:
data = ""
if data and data != self.stats:
self.stats = json.loads(data)
@self.zkhandler.zk_conn.DataWatch(
self.zkhandler.schema.path("osd.device", self.osd_id)
)
def watch_osd_device(data, stat, event=""):
if event and event.type == "DELETED":
# The key has been deleted after existing before; terminate this watcher
# because this class instance is about to be reaped in Daemon.py
return False
try:
data = data.decode("ascii")
except AttributeError:
data = ""
if data and data != self.device:
self.device = data
# Exception conditional for migration from schema v7 to schema v8
try:
@self.zkhandler.zk_conn.DataWatch(
self.zkhandler.schema.path("osd.vg", self.osd_id)
)
def watch_osd_vg(data, stat, event=""):
if event and event.type == "DELETED":
# The key has been deleted after existing before; terminate this watcher
# because this class instance is about to be reaped in Daemon.py
return False
try:
data = data.decode("ascii")
except AttributeError:
data = ""
if data and data != self.vg:
self.vg = data
@self.zkhandler.zk_conn.DataWatch(
self.zkhandler.schema.path("osd.lv", self.osd_id)
)
def watch_osd_lv(data, stat, event=""):
if event and event.type == "DELETED":
# The key has been deleted after existing before; terminate this watcher
# because this class instance is about to be reaped in Daemon.py
return False
try:
data = data.decode("ascii")
except AttributeError:
data = ""
if data and data != self.lv:
self.lv = data
if self.node == self.this_node.name:
self.update_information()
except TypeError:
return
def update_information(self):
if self.vg is not None and self.lv is not None:
find_device = f"/dev/{self.vg}/{self.lv}"
else:
find_device = self.device
self.logger.out(
f"Updating stored disk information for OSD {self.osd_id}",
state="i",
)
retcode, stdout, stderr = common.run_os_command(
f"ceph-volume lvm list {find_device}"
)
osd_blockdev = None
osd_fsid = None
osd_clusterfsid = None
osd_device = None
for line in stdout.split("\n"):
if "block device" in line:
osd_blockdev = line.split()[-1]
if "osd fsid" in line:
osd_fsid = line.split()[-1]
if "cluster fsid" in line:
osd_clusterfsid = line.split()[-1]
if "devices" in line:
osd_device = line.split()[-1]
if not osd_blockdev or not osd_fsid or not osd_clusterfsid or not osd_device:
self.logger.out(
f"Failed to find updated OSD information via ceph-volume for {find_device}",
state="e",
)
return
# Split OSD blockdev into VG and LV components
# osd_blockdev = /dev/ceph-<uuid>/osd-block-<uuid>
_, _, osd_vg, osd_lv = osd_blockdev.split("/")
# Except for potentially the "osd.device", this should never change, but this ensures
# that the data is added at lease once on initialization for existing OSDs.
self.zkhandler.write(
[
(("osd.device", self.osd_id), osd_device),
(("osd.fsid", self.osd_id), ""),
(("osd.ofsid", self.osd_id), osd_fsid),
(("osd.cfsid", self.osd_id), osd_clusterfsid),
(("osd.lvm", self.osd_id), ""),
(("osd.vg", self.osd_id), osd_vg),
(("osd.lv", self.osd_id), osd_lv),
]
)
self.device = osd_device
self.vg = osd_vg
self.lv = osd_lv
@staticmethod
def add_osd(
zkhandler, logger, node, device, weight, ext_db_flag=False, ext_db_ratio=0.05
):
# Handle a detect device if that is passed
if match(r"detect:", device):
ddevice = get_detect_device(device)
if ddevice is None:
logger.out(
f"Failed to determine block device from detect string {device}",
state="e",
)
return False
else:
logger.out(
f"Determined block device {ddevice} from detect string {device}",
state="i",
)
device = ddevice
# We are ready to create a new OSD on this node
logger.out("Creating new OSD disk on block device {}".format(device), state="i")
try:
# 1. Create an OSD; we do this so we know what ID will be gen'd
retcode, stdout, stderr = common.run_os_command("ceph osd create")
if retcode:
print("ceph osd create")
print(stdout)
print(stderr)
raise Exception
osd_id = stdout.rstrip()
# 2. Remove that newly-created OSD
retcode, stdout, stderr = common.run_os_command(
"ceph osd rm {}".format(osd_id)
)
if retcode:
print("ceph osd rm")
print(stdout)
print(stderr)
raise Exception
# 3a. Zap the disk to ensure it is ready to go
logger.out("Zapping disk {}".format(device), state="i")
retcode, stdout, stderr = common.run_os_command(
"ceph-volume lvm zap --destroy {}".format(device)
)
if retcode:
print("ceph-volume lvm zap")
print(stdout)
print(stderr)
raise Exception
dev_flags = "--data {}".format(device)
# 3b. Prepare the logical volume if ext_db_flag
if ext_db_flag:
_, osd_size_bytes, _ = common.run_os_command(
"blockdev --getsize64 {}".format(device)
)
osd_size_bytes = int(osd_size_bytes)
result = CephOSDInstance.create_osd_db_lv(
zkhandler, logger, osd_id, ext_db_ratio, osd_size_bytes
)
if not result:
raise Exception
db_device = "osd-db/osd-{}".format(osd_id)
dev_flags += " --block.db {}".format(db_device)
else:
db_device = ""
# 3c. Create the OSD for real
logger.out(
"Preparing LVM for new OSD disk with ID {} on {}".format(
osd_id, device
),
state="i",
)
retcode, stdout, stderr = common.run_os_command(
"ceph-volume lvm prepare --bluestore {devices}".format(
devices=dev_flags
)
)
if retcode:
print("ceph-volume lvm prepare")
print(stdout)
print(stderr)
raise Exception
# 4a. Get OSD information
logger.out(
"Getting OSD information for ID {} on {}".format(osd_id, device),
state="i",
)
retcode, stdout, stderr = common.run_os_command(
"ceph-volume lvm list {device}".format(device=device)
)
for line in stdout.split("\n"):
if "block device" in line:
osd_blockdev = line.split()[-1]
if "osd fsid" in line:
osd_fsid = line.split()[-1]
if "cluster fsid" in line:
osd_clusterfsid = line.split()[-1]
if "devices" in line:
osd_device = line.split()[-1]
if not osd_fsid:
print("ceph-volume lvm list")
print("Could not find OSD information in data:")
print(stdout)
print(stderr)
raise Exception
# Split OSD blockdev into VG and LV components
# osd_blockdev = /dev/ceph-<uuid>/osd-block-<uuid>
_, _, osd_vg, osd_lv = osd_blockdev.split("/")
# Reset whatever we were given to Ceph's /dev/xdX naming
if device != osd_device:
device = osd_device
# 4b. Activate the OSD
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logger.out("Activating new OSD disk with ID {}".format(osd_id), state="i")
retcode, stdout, stderr = common.run_os_command(
"ceph-volume lvm activate --bluestore {osdid} {osdfsid}".format(
osdid=osd_id, osdfsid=osd_fsid
)
)
if retcode:
print("ceph-volume lvm activate")
print(stdout)
print(stderr)
raise Exception
# 5. Add it to the crush map
logger.out(
"Adding new OSD disk with ID {} to CRUSH map".format(osd_id), state="i"
)
retcode, stdout, stderr = common.run_os_command(
"ceph osd crush add osd.{osdid} {weight} root=default host={node}".format(
osdid=osd_id, weight=weight, node=node
)
)
if retcode:
print("ceph osd crush add")
print(stdout)
print(stderr)
raise Exception
time.sleep(0.5)
# 6. Verify it started
retcode, stdout, stderr = common.run_os_command(
"systemctl status ceph-osd@{osdid}".format(osdid=osd_id)
)
if retcode:
print("systemctl status")
print(stdout)
print(stderr)
raise Exception
# 7. Add the new OSD to the list
logger.out(
"Adding new OSD disk with ID {} to Zookeeper".format(osd_id), state="i"
)
zkhandler.write(
[
(("osd", osd_id), ""),
(("osd.node", osd_id), node),
(("osd.device", osd_id), device),
(("osd.db_device", osd_id), db_device),
(("osd.fsid", osd_id), ""),
(("osd.ofsid", osd_id), osd_fsid),
(("osd.cfsid", osd_id), osd_clusterfsid),
(("osd.lvm", osd_id), ""),
(("osd.vg", osd_id), osd_vg),
(("osd.lv", osd_id), osd_lv),
(
("osd.stats", osd_id),
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'{"uuid": "|", "up": 0, "in": 0, "primary_affinity": "|", "utilization": "|", "var": "|", "pgs": "|", "kb": "|", "weight": "|", "reweight": "|", "node": "|", "used": "|", "avail": "|", "wr_ops": "|", "wr_data": "|", "rd_ops": "|", "rd_data": "|", "state": "|"}',
),
]
)
# Log it
logger.out("Created new OSD disk with ID {}".format(osd_id), state="o")
return True
except Exception as e:
# Log it
logger.out("Failed to create new OSD disk: {}".format(e), state="e")
return False
@staticmethod
def replace_osd(
zkhandler,
logger,
node,
osd_id,
old_device,
new_device,
weight,
ext_db_flag=False,
):
# Handle a detect device if that is passed
if match(r"detect:", new_device):
ddevice = get_detect_device(new_device)
if ddevice is None:
logger.out(
f"Failed to determine block device from detect string {new_device}",
state="e",
)
return False
else:
logger.out(
f"Determined block device {ddevice} from detect string {new_device}",
state="i",
)
new_device = ddevice
# We are ready to create a new OSD on this node
logger.out(
"Replacing OSD {} disk with block device {}".format(osd_id, new_device),
state="i",
)
try:
# Verify the OSD is present
retcode, stdout, stderr = common.run_os_command("ceph osd ls")
osd_list = stdout.split("\n")
if osd_id not in osd_list:
logger.out(
"Could not find OSD {} in the cluster".format(osd_id), state="e"
)
return True
# 1. Set the OSD down and out so it will flush
logger.out("Setting down OSD disk with ID {}".format(osd_id), state="i")
retcode, stdout, stderr = common.run_os_command(
"ceph osd down {}".format(osd_id)
)
if retcode:
print("ceph osd down")
print(stdout)
print(stderr)
raise Exception
logger.out("Setting out OSD disk with ID {}".format(osd_id), state="i")
retcode, stdout, stderr = common.run_os_command(
"ceph osd out {}".format(osd_id)
)
if retcode:
print("ceph osd out")
print(stdout)
print(stderr)
raise Exception
# 2. Wait for the OSD to be safe to remove (but don't wait for rebalancing to complete)
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logger.out(f"Waiting for OSD {osd_id} to be safe to remove", state="i")
while True:
retcode, stdout, stderr = common.run_os_command(
f"ceph osd safe-to-destroy osd.{osd_id}"
)
if retcode in [0, 11]:
# Code 0 = success
# Code 11 = "Error EAGAIN: OSD(s) 5 have no reported stats, and not all PGs are active+clean; we cannot draw any conclusions." which means all PGs have been remappped but backfill is still occurring
break
else:
time.sleep(5)
# 3. Stop the OSD process
logger.out("Stopping OSD disk with ID {}".format(osd_id), state="i")
retcode, stdout, stderr = common.run_os_command(
"systemctl stop ceph-osd@{}".format(osd_id)
)
if retcode:
print("systemctl stop")
print(stdout)
print(stderr)
raise Exception
time.sleep(2)
# 4. Destroy the OSD
logger.out("Destroying OSD with ID {osd_id}", state="i")
retcode, stdout, stderr = common.run_os_command(
f"ceph osd destroy {osd_id} --yes-i-really-mean-it"
)
if retcode:
print("ceph osd destroy")
print(stdout)
print(stderr)
raise Exception
# 5. Adjust the weight
logger.out(
"Adjusting weight of OSD disk with ID {} in CRUSH map".format(osd_id),
state="i",
)
retcode, stdout, stderr = common.run_os_command(
"ceph osd crush reweight osd.{osdid} {weight}".format(
osdid=osd_id, weight=weight
)
)
if retcode:
print("ceph osd crush reweight")
print(stdout)
print(stderr)
raise Exception
# 6a. Zap the new disk to ensure it is ready to go
logger.out("Zapping disk {}".format(new_device), state="i")
retcode, stdout, stderr = common.run_os_command(
"ceph-volume lvm zap --destroy {}".format(new_device)
)
if retcode:
print("ceph-volume lvm zap")
print(stdout)
print(stderr)
raise Exception
dev_flags = "--data {}".format(new_device)
# 6b. Prepare the logical volume if ext_db_flag
if ext_db_flag:
db_device = "osd-db/osd-{}".format(osd_id)
dev_flags += " --block.db {}".format(db_device)
else:
db_device = ""
# 6c. Replace the OSD
logger.out(
"Preparing LVM for replaced OSD {} disk on {}".format(
osd_id, new_device
),
state="i",
)
retcode, stdout, stderr = common.run_os_command(
"ceph-volume lvm prepare --osd-id {osdid} --bluestore {devices}".format(
osdid=osd_id, devices=dev_flags
)
)
if retcode:
print("ceph-volume lvm prepare")
print(stdout)
print(stderr)
raise Exception
# 7a. Get OSD information
logger.out(
"Getting OSD information for ID {} on {}".format(osd_id, new_device),
state="i",
)
retcode, stdout, stderr = common.run_os_command(
"ceph-volume lvm list {device}".format(device=new_device)
)
for line in stdout.split("\n"):
if "block device" in line:
osd_blockdev = line.split()[-1]
if "osd fsid" in line:
osd_fsid = line.split()[-1]
if "cluster fsid" in line:
osd_clusterfsid = line.split()[-1]
if "devices" in line:
osd_device = line.split()[-1]
if not osd_fsid:
print("ceph-volume lvm list")
print("Could not find OSD information in data:")
print(stdout)
print(stderr)
raise Exception
# Split OSD blockdev into VG and LV components
# osd_blockdev = /dev/ceph-<uuid>/osd-block-<uuid>
_, _, osd_vg, osd_lv = osd_blockdev.split("/")
# Reset whatever we were given to Ceph's /dev/xdX naming
if new_device != osd_device:
new_device = osd_device
# 7b. Activate the OSD
logger.out("Activating new OSD disk with ID {}".format(osd_id), state="i")
retcode, stdout, stderr = common.run_os_command(
"ceph-volume lvm activate --bluestore {osdid} {osdfsid}".format(
osdid=osd_id, osdfsid=osd_fsid
)
)
if retcode:
print("ceph-volume lvm activate")
print(stdout)
print(stderr)
raise Exception
time.sleep(0.5)
# 8. Verify it started
retcode, stdout, stderr = common.run_os_command(
"systemctl status ceph-osd@{osdid}".format(osdid=osd_id)
)
if retcode:
print("systemctl status")
print(stdout)
print(stderr)
raise Exception
# 9. Update Zookeeper information
logger.out(
"Adding new OSD disk with ID {} to Zookeeper".format(osd_id), state="i"
)
zkhandler.write(
[
(("osd", osd_id), ""),
(("osd.node", osd_id), node),
(("osd.device", osd_id), new_device),
(("osd.db_device", osd_id), db_device),
(("osd.fsid", osd_id), ""),
(("osd.ofsid", osd_id), osd_fsid),
(("osd.cfsid", osd_id), osd_clusterfsid),
(("osd.lvm", osd_id), ""),
(("osd.vg", osd_id), osd_vg),
(("osd.lv", osd_id), osd_lv),
(
("osd.stats", osd_id),
'{"uuid": "|", "up": 0, "in": 0, "primary_affinity": "|", "utilization": "|", "var": "|", "pgs": "|", "kb": "|", "weight": "|", "reweight": "|", "node": "|", "used": "|", "avail": "|", "wr_ops": "|", "wr_data": "|", "rd_ops": "|", "rd_data": "|", "state": "|"}',
),
]
)
# Log it
logger.out(
"Replaced OSD {} disk with device {}".format(osd_id, new_device),
state="o",
)
return True
except Exception as e:
# Log it
logger.out("Failed to replace OSD {} disk: {}".format(osd_id, e), state="e")
return False
@staticmethod
def refresh_osd(zkhandler, logger, node, osd_id, device, ext_db_flag):
# Handle a detect device if that is passed
if match(r"detect:", device):
ddevice = get_detect_device(device)
if ddevice is None:
logger.out(
f"Failed to determine block device from detect string {device}",
state="e",
)
return False
else:
logger.out(
f"Determined block device {ddevice} from detect string {device}",
state="i",
)
device = ddevice
# We are ready to create a new OSD on this node
logger.out(
"Refreshing OSD {} disk on block device {}".format(osd_id, device),
state="i",
)
try:
# 1. Verify the OSD is present
retcode, stdout, stderr = common.run_os_command("ceph osd ls")
osd_list = stdout.split("\n")
if osd_id not in osd_list:
logger.out(
"Could not find OSD {} in the cluster".format(osd_id), state="e"
)
return True
dev_flags = "--data {}".format(device)
if ext_db_flag:
db_device = "osd-db/osd-{}".format(osd_id)
dev_flags += " --block.db {}".format(db_device)
else:
db_device = ""
# 2. Get OSD information
logger.out(
"Getting OSD information for ID {} on {}".format(osd_id, device),
state="i",
)
retcode, stdout, stderr = common.run_os_command(
"ceph-volume lvm list {device}".format(device=device)
)
for line in stdout.split("\n"):
if "block device" in line:
osd_blockdev = line.split()[-1]
if "osd fsid" in line:
osd_fsid = line.split()[-1]
if "cluster fsid" in line:
osd_clusterfsid = line.split()[-1]
if "devices" in line:
osd_device = line.split()[-1]
if not osd_fsid:
print("ceph-volume lvm list")
print("Could not find OSD information in data:")
print(stdout)
print(stderr)
raise Exception
# Split OSD blockdev into VG and LV components
# osd_blockdev = /dev/ceph-<uuid>/osd-block-<uuid>
_, _, osd_vg, osd_lv = osd_blockdev.split("/")
# Reset whatever we were given to Ceph's /dev/xdX naming
if device != osd_device:
device = osd_device
# 3. Activate the OSD
logger.out("Activating new OSD disk with ID {}".format(osd_id), state="i")
retcode, stdout, stderr = common.run_os_command(
"ceph-volume lvm activate --bluestore {osdid} {osdfsid}".format(
osdid=osd_id, osdfsid=osd_fsid
)
)
if retcode:
print("ceph-volume lvm activate")
print(stdout)
print(stderr)
raise Exception
time.sleep(0.5)
# 4. Verify it started
retcode, stdout, stderr = common.run_os_command(
"systemctl status ceph-osd@{osdid}".format(osdid=osd_id)
)
if retcode:
print("systemctl status")
print(stdout)
print(stderr)
raise Exception
# 5. Update Zookeeper information
logger.out(
"Adding new OSD disk with ID {} to Zookeeper".format(osd_id), state="i"
)
zkhandler.write(
[
(("osd", osd_id), ""),
(("osd.node", osd_id), node),
(("osd.device", osd_id), device),
(("osd.db_device", osd_id), db_device),
(("osd.fsid", osd_id), ""),
(("osd.ofsid", osd_id), osd_fsid),
(("osd.cfsid", osd_id), osd_clusterfsid),
(("osd.lvm", osd_id), ""),
(("osd.vg", osd_id), osd_vg),
(("osd.lv", osd_id), osd_lv),
(
("osd.stats", osd_id),
'{"uuid": "|", "up": 0, "in": 0, "primary_affinity": "|", "utilization": "|", "var": "|", "pgs": "|", "kb": "|", "weight": "|", "reweight": "|", "node": "|", "used": "|", "avail": "|", "wr_ops": "|", "wr_data": "|", "rd_ops": "|", "rd_data": "|", "state": "|"}',
),
]
)
# Log it
logger.out("Refreshed OSD {} disk on {}".format(osd_id, device), state="o")
return True
except Exception as e:
# Log it
logger.out("Failed to refresh OSD {} disk: {}".format(osd_id, e), state="e")
return False
@staticmethod
def remove_osd(zkhandler, logger, osd_id, osd_obj, force_flag):
logger.out("Removing OSD disk {}".format(osd_id), state="i")
try:
# Verify the OSD is present
retcode, stdout, stderr = common.run_os_command("ceph osd ls")
osd_list = stdout.split("\n")
if osd_id not in osd_list:
logger.out(
"Could not find OSD {} in the cluster".format(osd_id), state="e"
)
if force_flag:
logger.out("Ignoring error due to force flag", state="i")
else:
return True
# 1. Set the OSD down and out so it will flush
logger.out("Setting down OSD disk with ID {}".format(osd_id), state="i")
retcode, stdout, stderr = common.run_os_command(
"ceph osd down {}".format(osd_id)
)
if retcode:
print("ceph osd down")
print(stdout)
print(stderr)
if force_flag:
logger.out("Ignoring error due to force flag", state="i")
else:
raise Exception
logger.out("Setting out OSD disk with ID {}".format(osd_id), state="i")
retcode, stdout, stderr = common.run_os_command(
"ceph osd out {}".format(osd_id)
)
if retcode:
print("ceph osd out")
print(stdout)
print(stderr)
if force_flag:
logger.out("Ignoring error due to force flag", state="i")
else:
raise Exception
# 2. Wait for the OSD to be safe to remove (but don't wait for rebalancing to complete)
logger.out("Waiting for OSD {osd_id} to be safe to remove", state="i")
while True:
retcode, stdout, stderr = common.run_os_command(
f"ceph osd safe-to-destroy osd.{osd_id}"
)
if int(retcode) in [0, 11]:
break
else:
time.sleep(5)
# 3. Stop the OSD process and wait for it to be terminated
logger.out("Stopping OSD disk with ID {}".format(osd_id), state="i")
retcode, stdout, stderr = common.run_os_command(
"systemctl stop ceph-osd@{}".format(osd_id)
)
if retcode:
print("systemctl stop")
print(stdout)
print(stderr)
if force_flag:
logger.out("Ignoring error due to force flag", state="i")
else:
raise Exception
time.sleep(2)
# 4. Determine the block devices
osd_vg = zkhandler.read(("osd.vg", osd_id))
osd_lv = zkhandler.read(("osd.lv", osd_id))
osd_lvm = f"/dev/{osd_vg}/{osd_lv}"
osd_device = None
logger.out(
f"Getting disk info for OSD {osd_id} LV {osd_lvm}",
2022-04-29 13:26:36 -04:00
state="i",
)
retcode, stdout, stderr = common.run_os_command(
f"ceph-volume lvm list {osd_lvm}"
)
for line in stdout.split("\n"):
if "devices" in line:
osd_device = line.split()[-1]
if not osd_device:
print("ceph-volume lvm list")
print("Could not find OSD information in data:")
print(stdout)
print(stderr)
if force_flag:
logger.out("Ignoring error due to force flag", state="i")
else:
raise Exception
# 5. Zap the volumes
logger.out(
"Zapping OSD {} disk on {}".format(osd_id, osd_device),
state="i",
)
retcode, stdout, stderr = common.run_os_command(
"ceph-volume lvm zap --destroy {}".format(osd_device)
)
if retcode:
print("ceph-volume lvm zap")
print(stdout)
print(stderr)
if force_flag:
logger.out("Ignoring error due to force flag", state="i")
else:
raise Exception
# 6. Purge the OSD from Ceph
logger.out("Purging OSD disk with ID {}".format(osd_id), state="i")
retcode, stdout, stderr = common.run_os_command(
"ceph osd purge {} --yes-i-really-mean-it".format(osd_id)
)
if retcode:
print("ceph osd purge")
print(stdout)
print(stderr)
if force_flag:
logger.out("Ignoring error due to force flag", state="i")
else:
raise Exception
# 7. Remove the DB device
if zkhandler.exists(("osd.db_device", osd_id)):
db_device = zkhandler.read(("osd.db_device", osd_id))
logger.out(
'Removing OSD DB logical volume "{}"'.format(db_device), state="i"
)
retcode, stdout, stderr = common.run_os_command(
"lvremove --yes --force {}".format(db_device)
)
# 8. Delete OSD from ZK
logger.out(
"Deleting OSD disk with ID {} from Zookeeper".format(osd_id), state="i"
)
zkhandler.delete(("osd", osd_id), recursive=True)
# Log it
logger.out("Removed OSD disk with ID {}".format(osd_id), state="o")
return True
except Exception as e:
# Log it
logger.out(
"Failed to purge OSD disk with ID {}: {}".format(osd_id, e), state="e"
)
return False
@staticmethod
def add_db_vg(zkhandler, logger, device):
# Check if an existsing volume group exists
retcode, stdout, stderr = common.run_os_command("vgdisplay osd-db")
if retcode != 5:
logger.out('Ceph OSD database VG "osd-db" already exists', state="e")
return False
# Handle a detect device if that is passed
if match(r"detect:", device):
ddevice = get_detect_device(device)
if ddevice is None:
logger.out(
f"Failed to determine block device from detect string {device}",
state="e",
)
return False
else:
logger.out(
f"Determined block device {ddevice} from detect string {device}",
state="i",
)
device = ddevice
logger.out(
"Creating new OSD database volume group on block device {}".format(device),
state="i",
)
try:
# 1. Create an empty partition table
logger.out(
"Creating partitions on block device {}".format(device), state="i"
)
retcode, stdout, stderr = common.run_os_command(
"sgdisk --clear {}".format(device)
)
if retcode:
print("sgdisk create partition table")
print(stdout)
print(stderr)
raise Exception
retcode, stdout, stderr = common.run_os_command(
"sgdisk --new 1:: --typecode 1:8e00 {}".format(device)
)
if retcode:
print("sgdisk create pv partition")
print(stdout)
print(stderr)
raise Exception
# Handle the partition ID portion
if search(r"by-path", device) or search(r"by-id", device):
# /dev/disk/by-path/pci-0000:03:00.0-scsi-0:1:0:0 -> pci-0000:03:00.0-scsi-0:1:0:0-part1
partition = "{}-part1".format(device)
elif search(r"nvme", device):
# /dev/nvme0n1 -> nvme0n1p1
partition = "{}p1".format(device)
else:
# /dev/sda -> sda1
# No other '/dev/disk/by-*' types are valid for raw block devices anyways
partition = "{}1".format(device)
# 2. Create the PV
logger.out("Creating PV on block device {}".format(partition), state="i")
retcode, stdout, stderr = common.run_os_command(
"pvcreate --force {}".format(partition)
)
if retcode:
print("pv creation")
print(stdout)
print(stderr)
raise Exception
# 2. Create the VG (named 'osd-db')
logger.out(
'Creating VG "osd-db" on block device {}'.format(partition), state="i"
)
retcode, stdout, stderr = common.run_os_command(
"vgcreate --force osd-db {}".format(partition)
)
if retcode:
print("vg creation")
print(stdout)
print(stderr)
raise Exception
# Log it
logger.out(
"Created new OSD database volume group on block device {}".format(
device
),
state="o",
)
return True
except Exception as e:
# Log it
logger.out(
"Failed to create OSD database volume group: {}".format(e), state="e"
)
return False
@staticmethod
def create_osd_db_lv(zkhandler, logger, osd_id, ext_db_ratio, osd_size_bytes):
logger.out(
"Creating new OSD database logical volume for OSD ID {}".format(osd_id),
state="i",
)
try:
# 0. Check if an existsing logical volume exists
retcode, stdout, stderr = common.run_os_command(
"lvdisplay osd-db/osd{}".format(osd_id)
)
if retcode != 5:
logger.out(
'Ceph OSD database LV "osd-db/osd{}" already exists'.format(osd_id),
state="e",
)
return False
# 1. Determine LV sizing
osd_db_size = int(osd_size_bytes * ext_db_ratio / 1024 / 1024)
# 2. Create the LV
logger.out(
'Creating DB LV "osd-db/osd-{}" of {}M ({} * {})'.format(
osd_id, osd_db_size, osd_size_bytes, ext_db_ratio
),
state="i",
)
retcode, stdout, stderr = common.run_os_command(
"lvcreate --yes --name osd-{} --size {} osd-db".format(
osd_id, osd_db_size
)
)
if retcode:
print("db lv creation")
print(stdout)
print(stderr)
raise Exception
# Log it
logger.out(
'Created new OSD database logical volume "osd-db/osd-{}"'.format(
osd_id
),
state="o",
)
return True
except Exception as e:
# Log it
logger.out(
"Failed to create OSD database logical volume: {}".format(e), state="e"
)
return False
class CephPoolInstance(object):
def __init__(self, zkhandler, logger, this_node, name):
self.zkhandler = zkhandler
self.logger = logger
self.this_node = this_node
self.name = name
self.pgs = ""
self.stats = dict()
@self.zkhandler.zk_conn.DataWatch(
self.zkhandler.schema.path("pool.pgs", self.name)
)
def watch_pool_node(data, stat, event=""):
if event and event.type == "DELETED":
# The key has been deleted after existing before; terminate this watcher
# because this class instance is about to be reaped in Daemon.py
return False
try:
data = data.decode("ascii")
except AttributeError:
data = ""
if data and data != self.pgs:
self.pgs = data
@self.zkhandler.zk_conn.DataWatch(
self.zkhandler.schema.path("pool.stats", self.name)
)
def watch_pool_stats(data, stat, event=""):
if event and event.type == "DELETED":
# The key has been deleted after existing before; terminate this watcher
# because this class instance is about to be reaped in Daemon.py
return False
try:
data = data.decode("ascii")
except AttributeError:
data = ""
if data and data != self.stats:
self.stats = json.loads(data)
class CephVolumeInstance(object):
def __init__(self, zkhandler, logger, this_node, pool, name):
self.zkhandler = zkhandler
self.logger = logger
self.this_node = this_node
self.pool = pool
self.name = name
self.stats = dict()
@self.zkhandler.zk_conn.DataWatch(
self.zkhandler.schema.path("volume.stats", f"{self.pool}/{self.name}")
)
def watch_volume_stats(data, stat, event=""):
if event and event.type == "DELETED":
# The key has been deleted after existing before; terminate this watcher
# because this class instance is about to be reaped in Daemon.py
return False
try:
data = data.decode("ascii")
except AttributeError:
data = ""
if data and data != self.stats:
self.stats = json.loads(data)
class CephSnapshotInstance(object):
def __init__(self, zkhandler, this_node, pool, volume, name):
self.zkhandler = zkhandler
self.this_node = this_node
self.pool = pool
self.volume = volume
self.name = name
self.stats = dict()
@self.zkhandler.zk_conn.DataWatch(
self.zkhandler.schema.path(
"snapshot.stats", f"{self.pool}/{self.volume}/{self.name}"
)
)
def watch_snapshot_stats(data, stat, event=""):
if event and event.type == "DELETED":
# The key has been deleted after existing before; terminate this watcher
# because this class instance is about to be reaped in Daemon.py
return False
try:
data = data.decode("ascii")
except AttributeError:
data = ""
if data and data != self.stats:
self.stats = json.loads(data)
# Primary command function
# This command pipe is only used for OSD adds and removes
def ceph_command(zkhandler, logger, this_node, data, d_osd):
# Get the command and args; the * + join ensures arguments with spaces (e.g. detect strings) are recombined right
command, *args = data.split()
args = " ".join(args)
# Adding a new OSD
if command == "osd_add":
node, device, weight, ext_db_flag, ext_db_ratio = args.split(",")
ext_db_flag = bool(strtobool(ext_db_flag))
ext_db_ratio = float(ext_db_ratio)
if node == this_node.name:
# Lock the command queue
zk_lock = zkhandler.writelock("base.cmd.ceph")
with zk_lock:
# Add the OSD
result = CephOSDInstance.add_osd(
zkhandler, logger, node, device, weight, ext_db_flag, ext_db_ratio
)
# Command succeeded
if result:
# Update the command queue
zkhandler.write([("base.cmd.ceph", "success-{}".format(data))])
# Command failed
else:
# Update the command queue
zkhandler.write([("base.cmd.ceph", "failure-{}".format(data))])
# Wait 1 seconds before we free the lock, to ensure the client hits the lock
time.sleep(1)
# Replacing an OSD
if command == "osd_replace":
node, osd_id, old_device, new_device, weight, ext_db_flag = args.split(",")
ext_db_flag = bool(strtobool(ext_db_flag))
if node == this_node.name:
# Lock the command queue
zk_lock = zkhandler.writelock("base.cmd.ceph")
with zk_lock:
# Add the OSD
result = CephOSDInstance.replace_osd(
zkhandler,
logger,
node,
osd_id,
old_device,
new_device,
weight,
ext_db_flag,
)
# Command succeeded
if result:
# Update the command queue
zkhandler.write([("base.cmd.ceph", "success-{}".format(data))])
# Command failed
else:
# Update the command queue
zkhandler.write([("base.cmd.ceph", "failure-{}".format(data))])
# Wait 1 seconds before we free the lock, to ensure the client hits the lock
time.sleep(1)
# Refreshing an OSD
if command == "osd_refresh":
node, osd_id, device, ext_db_flag = args.split(",")
ext_db_flag = bool(strtobool(ext_db_flag))
if node == this_node.name:
# Lock the command queue
zk_lock = zkhandler.writelock("base.cmd.ceph")
with zk_lock:
# Add the OSD
result = CephOSDInstance.refresh_osd(
zkhandler, logger, node, osd_id, device, ext_db_flag
)
# Command succeeded
if result:
# Update the command queue
zkhandler.write([("base.cmd.ceph", "success-{}".format(data))])
# Command failed
else:
# Update the command queue
zkhandler.write([("base.cmd.ceph", "failure-{}".format(data))])
# Wait 1 seconds before we free the lock, to ensure the client hits the lock
time.sleep(1)
# Removing an OSD
elif command == "osd_remove":
2022-04-29 13:26:36 -04:00
osd_id, force = args.split(",")
force_flag = bool(strtobool(force))
# Verify osd_id is in the list
if d_osd[osd_id] and d_osd[osd_id].node == this_node.name:
# Lock the command queue
zk_lock = zkhandler.writelock("base.cmd.ceph")
with zk_lock:
# Remove the OSD
result = CephOSDInstance.remove_osd(
zkhandler, logger, osd_id, d_osd[osd_id], force_flag
)
# Command succeeded
if result:
# Update the command queue
zkhandler.write([("base.cmd.ceph", "success-{}".format(data))])
# Command failed
else:
# Update the command queue
zkhandler.write([("base.cmd.ceph", "failure-{}".format(data))])
# Wait 1 seconds before we free the lock, to ensure the client hits the lock
time.sleep(1)
# Adding a new DB VG
elif command == "db_vg_add":
node, device = args.split(",")
if node == this_node.name:
# Lock the command queue
zk_lock = zkhandler.writelock("base.cmd.ceph")
with zk_lock:
# Add the VG
result = CephOSDInstance.add_db_vg(zkhandler, logger, device)
# Command succeeded
if result:
# Update the command queue
zkhandler.write([("base.cmd.ceph", "success-{}".format(data))])
# Command failed
else:
# Update the command queue
zkhandler.write([("base.cmd.ceph", "failure={}".format(data))])
# Wait 1 seconds before we free the lock, to ensure the client hits the lock
time.sleep(1)