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Add separate OSD DB device support 

Adds in three parts:

1. Create an API endpoint to create OSD DB volume groups on a device.
Passed through to the node via the same command pipeline as
creating/removing OSDs, and creates a volume group with a fixed name
(osd-db).

2. Adds API support for specifying whether or not to use this DB volume
group when creating a new OSD via the "ext_db" flag. Naming and sizing
is fixed for simplicity and based on Ceph recommendations (5% of OSD
size). The Zookeeper schema tracks the block device to use during
removal.

3. Adds CLI support for the new and modified API endpoints, as well as
displaying the block device and DB block device in the OSD list.

While I debated supporting adding a DB device to an existing OSD, in
practice this ended up being a very complex operation involving stopping
the OSD and setting some options, so this is not supported; this can be
specified during OSD creation only.

Closes #142
This commit is contained in:
Joshua Boniface 2021-09-23 13:59:49 -04:00
parent df277edf1c
commit adc8a5a3bc
9 changed files with 491 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

61
api-daemon/pvcapid/flaskapi.py
View File

@ -3599,6 +3599,52 @@ class API_Storage_Ceph_Option(Resource):
api.add_resource(API_Storage_Ceph_Option, '/storage/ceph/option')
# /storage/ceph/osddb
class API_Storage_Ceph_OSDDB_Root(Resource):
@RequestParser([
{'name': 'node', 'required': True, 'helptext': "A valid node must be specified."},
{'name': 'device', 'required': True, 'helptext': "A valid device must be specified."},
])
@Authenticator
def post(self, reqargs):
"""
Add a Ceph OSD database volume group to the cluster
Note: This task may take up to 30s to complete and return
---
tags:
- storage / ceph
parameters:
- in: query
name: node
type: string
required: true
description: The PVC node to create the OSD DB volume group on
- in: query
name: device
type: string
required: true
description: The block device (e.g. "/dev/sdb", "/dev/disk/by-path/...", etc.) to create the OSD DB volume group on
responses:
200:
description: OK
schema:
type: object
id: Message
400:
description: Bad request
schema:
type: object
id: Message
"""
return api_helper.ceph_osd_db_vg_add(
reqargs.get('node', None),
reqargs.get('device', None)
)
api.add_resource(API_Storage_Ceph_OSDDB_Root, '/storage/ceph/osddb')
# /storage/ceph/osd
class API_Storage_Ceph_OSD_Root(Resource):
@RequestParser([
@ -3619,6 +3665,12 @@ class API_Storage_Ceph_OSD_Root(Resource):
id:
type: string (containing integer)
description: The Ceph ID of the OSD
device:
type: string
description: The OSD data block device
db_device:
type: string
description: The OSD database/WAL block device (logical volume); empty if not applicable
stats:
type: object
properties:
@ -3698,6 +3750,7 @@ class API_Storage_Ceph_OSD_Root(Resource):
{'name': 'node', 'required': True, 'helptext': "A valid node must be specified."},
{'name': 'device', 'required': True, 'helptext': "A valid device must be specified."},
{'name': 'weight', 'required': True, 'helptext': "An OSD weight must be specified."},
{'name': 'ext_db', 'required': False, 'helptext': "Whether to use an external OSD DB LV device."},
])
@Authenticator
def post(self, reqargs):
@ -3723,6 +3776,11 @@ class API_Storage_Ceph_OSD_Root(Resource):
type: number
required: true
description: The Ceph CRUSH weight for the OSD
- in: query
name: ext_db
type: boolean
required: false
description: Whether to use an external OSD DB LV device
responses:
200:
description: OK
@ -3738,7 +3796,8 @@ class API_Storage_Ceph_OSD_Root(Resource):
return api_helper.ceph_osd_add(
reqargs.get('node', None),
reqargs.get('device', None),
reqargs.get('weight', None)
reqargs.get('weight', None),
reqargs.get('ext_db', False),
)

22
api-daemon/pvcapid/helper.py
View File

@ -1274,11 +1274,29 @@ def ceph_osd_state(zkhandler, osd):
@ZKConnection(config)
def ceph_osd_add(zkhandler, node, device, weight):
def ceph_osd_db_vg_add(zkhandler, node, device):
"""
Add a Ceph OSD database VG to the PVC Ceph storage cluster.
"""
retflag, retdata = pvc_ceph.add_osd_db_vg(zkhandler, node, device)
if retflag:
retcode = 200
else:
retcode = 400
output = {
'message': retdata.replace('\"', '\'')
}
return output, retcode
@ZKConnection(config)
def ceph_osd_add(zkhandler, node, device, weight, ext_db_flag=False):
"""
Add a Ceph OSD to the PVC Ceph storage cluster.
"""
retflag, retdata = pvc_ceph.add_osd(zkhandler, node, device, weight)
retflag, retdata = pvc_ceph.add_osd(zkhandler, node, device, weight, ext_db_flag)
if retflag:
retcode = 200

67
client-cli/pvc/cli_lib/ceph.py
View File

@ -149,6 +149,31 @@ def format_raw_output(status_data):
return '\n'.join(ainformation)
#
# OSD DB VG functions
#
def ceph_osd_db_vg_add(config, node, device):
"""
Add new Ceph OSD database volume group
API endpoint: POST /api/v1/storage/ceph/osddb
API arguments: node={node}, device={device}
API schema: {"message":"{data}"}
"""
params = {
'node': node,
'device': device
}
response = call_api(config, 'post', '/storage/ceph/osddb', params=params)
if response.status_code == 200:
retstatus = True
else:
retstatus = False
return retstatus, response.json().get('message', '')
#
# OSD functions
#
@ -197,18 +222,19 @@ def ceph_osd_list(config, limit):
return False, response.json().get('message', '')
def ceph_osd_add(config, node, device, weight):
def ceph_osd_add(config, node, device, weight, ext_db_flag):
"""
Add new Ceph OSD
API endpoint: POST /api/v1/storage/ceph/osd
API arguments: node={node}, device={device}, weight={weight}
API arguments: node={node}, device={device}, weight={weight}, ext_db={ext_db_flag}
API schema: {"message":"{data}"}
"""
params = {
'node': node,
'device': device,
'weight': weight
'weight': weight,
'ext_db': ext_db_flag
}
response = call_api(config, 'post', '/storage/ceph/osd', params=params)
@ -312,13 +338,15 @@ def format_list_osd(osd_list):
osd_list_output = []
osd_id_length = 3
osd_node_length = 5
osd_device_length = 6
osd_db_device_length = 9
osd_up_length = 4
osd_in_length = 4
osd_size_length = 5
osd_weight_length = 3
osd_reweight_length = 5
osd_pgs_length = 4
osd_node_length = 5
osd_used_length = 5
osd_free_length = 6
osd_util_length = 6
@ -358,10 +386,21 @@ def format_list_osd(osd_list):
if _osd_id_length > osd_id_length:
osd_id_length = _osd_id_length
# Set the OSD node length
_osd_node_length = len(osd_information['stats']['node']) + 1
if _osd_node_length > osd_node_length:
osd_node_length = _osd_node_length
# Set the OSD device length
_osd_device_length = len(osd_information['device']) + 1
if _osd_device_length > osd_device_length:
osd_device_length = _osd_device_length
# Set the OSD db_device length
_osd_db_device_length = len(osd_information['db_device']) + 1
if _osd_db_device_length > osd_db_device_length:
osd_db_device_length = _osd_db_device_length
# Set the size and length
_osd_size_length = len(str(osd_information['stats']['size'])) + 1
if _osd_size_length > osd_size_length:
@ -422,12 +461,12 @@ def format_list_osd(osd_list):
osd_list_output.append('{bold}{osd_header: <{osd_header_length}} {state_header: <{state_header_length}} {details_header: <{details_header_length}} {read_header: <{read_header_length}} {write_header: <{write_header_length}}{end_bold}'.format(
bold=ansiprint.bold(),
end_bold=ansiprint.end(),
osd_header_length=osd_id_length + osd_node_length + 1,
osd_header_length=osd_id_length + osd_node_length + osd_device_length + osd_db_device_length + 3,
state_header_length=osd_up_length + osd_in_length + 1,
details_header_length=osd_size_length + osd_pgs_length + osd_weight_length + osd_reweight_length + osd_used_length + osd_free_length + osd_util_length + osd_var_length + 7,
read_header_length=osd_rdops_length + osd_rddata_length + 1,
write_header_length=osd_wrops_length + osd_wrdata_length + 1,
osd_header='OSDs ' + ''.join(['-' for _ in range(5, osd_id_length + osd_node_length)]),
osd_header='OSDs ' + ''.join(['-' for _ in range(5, osd_id_length + osd_node_length + osd_device_length + osd_db_device_length + 2)]),
state_header='State ' + ''.join(['-' for _ in range(6, osd_up_length + osd_in_length)]),
details_header='Details ' + ''.join(['-' for _ in range(8, osd_size_length + osd_pgs_length + osd_weight_length + osd_reweight_length + osd_used_length + osd_free_length + osd_util_length + osd_var_length + 6)]),
read_header='Read ' + ''.join(['-' for _ in range(5, osd_rdops_length + osd_rddata_length)]),
@ -437,6 +476,8 @@ def format_list_osd(osd_list):
osd_list_output.append('{bold}\
{osd_id: <{osd_id_length}} \
{osd_node: <{osd_node_length}} \
{osd_device: <{osd_device_length}} \
{osd_db_device: <{osd_db_device_length}} \
{osd_up: <{osd_up_length}} \
{osd_in: <{osd_in_length}} \
{osd_size: <{osd_size_length}} \
@ -456,6 +497,8 @@ def format_list_osd(osd_list):
end_bold=ansiprint.end(),
osd_id_length=osd_id_length,
osd_node_length=osd_node_length,
osd_device_length=osd_device_length,
osd_db_device_length=osd_db_device_length,
osd_up_length=osd_up_length,
osd_in_length=osd_in_length,
osd_size_length=osd_size_length,
@ -472,6 +515,8 @@ def format_list_osd(osd_list):
osd_rddata_length=osd_rddata_length,
osd_id='ID',
osd_node='Node',
osd_device='Block',
osd_db_device='DB Block',
osd_up='Up',
osd_in='In',
osd_size='Size',
@ -500,10 +545,16 @@ def format_list_osd(osd_list):
osd_util = round(osd_information['stats']['utilization'], 2)
osd_var = round(osd_information['stats']['var'], 2)
osd_db_device = osd_information['db_device']
if not osd_db_device:
osd_db_device = 'N/A'
# Format the output header
osd_list_output.append('{bold}\
{osd_id: <{osd_id_length}} \
{osd_node: <{osd_node_length}} \
{osd_device: <{osd_device_length}} \
{osd_db_device: <{osd_db_device_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}} \
@ -524,6 +575,8 @@ def format_list_osd(osd_list):
end_colour=ansiprint.end(),
osd_id_length=osd_id_length,
osd_node_length=osd_node_length,
osd_device_length=osd_device_length,
osd_db_device_length=osd_db_device_length,
osd_up_length=osd_up_length,
osd_in_length=osd_in_length,
osd_size_length=osd_size_length,
@ -540,6 +593,8 @@ def format_list_osd(osd_list):
osd_rddata_length=osd_rddata_length,
osd_id=osd_information['id'],
osd_node=osd_information['stats']['node'],
osd_device=osd_information['device'],
osd_db_device=osd_db_device,
osd_up_colour=osd_up_colour,
osd_up=osd_up_flag,
osd_in_colour=osd_in_colour,

46
client-cli/pvc/pvc.py
View File

@ -2583,6 +2583,38 @@ def ceph_osd():
pass
###############################################################################
# pvc storage osd create-db-vg
###############################################################################
@click.command(name='create-db-vg', short_help='Create new OSD database volume group.')
@click.argument(
'node'
)
@click.argument(
'device'
)
@click.option(
'-y', '--yes', 'confirm_flag',
is_flag=True, default=False,
help='Confirm the creation'
)
@cluster_req
def ceph_osd_create_db_vg(node, device, confirm_flag):
"""
Create a new Ceph OSD database volume group on node NODE with block device DEVICE.
This volume group will be used for Ceph OSD database functionality if the '--ext-db' flag is passed to newly-created OSDs during 'pvc storage osd add'. DEVICE should be an extremely fast SSD device (NVMe, Intel Optane, etc.) which is significantly faster than the normal OSD disks and with very high write endurance. Only one OSD database volume group on a single physical device is supported per node, so it must be fast and large enough to act as an effective OSD database device for all OSDs on the node; the database volume for each OSD is fixed to 5% of the OSD's size. Attempting to add additional database volume groups after the first will fail.
"""
if not confirm_flag and not config['unsafe']:
try:
click.confirm('Destroy all data and create a new OSD database volume group on {}:{}'.format(node, device), prompt_suffix='? ', abort=True)
except Exception:
exit(0)
retcode, retmsg = pvc_ceph.ceph_osd_db_vg_add(config, node, device)
cleanup(retcode, retmsg)
###############################################################################
# pvc storage osd add
###############################################################################
@ -2598,15 +2630,22 @@ def ceph_osd():
default=1.0, show_default=True,
help='Weight of the OSD within the CRUSH map.'
)
@click.option(
'-d', '--ext-db', 'ext_db_flag',
is_flag=True, default=False,
help='Use an external database logical volume for this OSD.'
)
@click.option(
'-y', '--yes', 'confirm_flag',
is_flag=True, default=False,
help='Confirm the removal'
help='Confirm the creation'
)
@cluster_req
def ceph_osd_add(node, device, weight, confirm_flag):
def ceph_osd_add(node, device, weight, ext_db_flag, confirm_flag):
"""
Add a new Ceph OSD on node NODE with block device DEVICE.
If '--ext-db' is specified, the existing OSD database volume group on NODE will be used; it must exist first or OSD creation will fail. See the 'pvc storage osd create-db-vg' command for more details.
"""
if not confirm_flag and not config['unsafe']:
try:
@ -2614,7 +2653,7 @@ def ceph_osd_add(node, device, weight, confirm_flag):
except Exception:
exit(0)
retcode, retmsg = pvc_ceph.ceph_osd_add(config, node, device, weight)
retcode, retmsg = pvc_ceph.ceph_osd_add(config, node, device, weight, ext_db_flag)
cleanup(retcode, retmsg)
@ -4856,6 +4895,7 @@ ceph_benchmark.add_command(ceph_benchmark_run)
ceph_benchmark.add_command(ceph_benchmark_info)
ceph_benchmark.add_command(ceph_benchmark_list)
ceph_osd.add_command(ceph_osd_create_db_vg)
ceph_osd.add_command(ceph_osd_add)
ceph_osd.add_command(ceph_osd_remove)
ceph_osd.add_command(ceph_osd_in)

49
daemon-common/ceph.py
View File

@ -180,20 +180,63 @@ def getClusterOSDList(zkhandler):
def getOSDInformation(zkhandler, osd_id):
# Get the devices
osd_device = zkhandler.read(('osd.device', osd_id))
osd_db_device = zkhandler.read(('osd.db_device', osd_id))
# Parse the stats data
osd_stats_raw = zkhandler.read(('osd.stats', osd_id))
osd_stats = dict(json.loads(osd_stats_raw))
osd_information = {
'id': osd_id,
'stats': osd_stats
'device': osd_device,
'db_device': osd_db_device,
'stats': osd_stats,
}
return osd_information
# OSD DB VG actions use the /cmd/ceph pipe
# These actions must occur on the specific node they reference
def add_osd_db_vg(zkhandler, node, device):
# Verify the target node exists
if not common.verifyNode(zkhandler, node):
return False, 'ERROR: No node named "{}" is present in the cluster.'.format(node)
# Tell the cluster to create a new OSD for the host
add_osd_db_vg_string = 'db_vg_add {},{}'.format(node, device)
zkhandler.write([
('base.cmd.ceph', add_osd_db_vg_string)
])
# 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
with zkhandler.readlock('base.cmd.ceph'):
try:
result = zkhandler.read('base.cmd.ceph').split()[0]
if result == 'success-db_vg_add':
message = 'Created new OSD database VG at "{}" on node "{}".'.format(device, node)
success = True
else:
message = 'ERROR: Failed to create new OSD database VG; check node logs for details.'
success = False
except Exception:
message = 'ERROR: Command ignored by node.'
success = False
# Acquire a write lock to ensure things go smoothly
with zkhandler.writelock('base.cmd.ceph'):
time.sleep(0.5)
zkhandler.write([
('base.cmd.ceph', '')
])
return success, message
# OSD addition and removal uses the /cmd/ceph pipe
# These actions must occur on the specific node they reference
def add_osd(zkhandler, node, device, weight):
def add_osd(zkhandler, node, device, weight, ext_db_flag=False):
# Verify the target node exists
if not common.verifyNode(zkhandler, node):
return False, 'ERROR: No node named "{}" is present in the cluster.'.format(node)
@ -204,7 +247,7 @@ def add_osd(zkhandler, node, device, weight):
return False, 'ERROR: Block device "{}" on node "{}" is used by OSD "{}"'.format(device, node, block_osd)
# Tell the cluster to create a new OSD for the host
add_osd_string = 'osd_add {},{},{}'.format(node, device, weight)
add_osd_string = 'osd_add {},{},{},{}'.format(node, device, weight, ext_db_flag)
zkhandler.write([
('base.cmd.ceph', add_osd_string)
])

1
daemon-common/migrations/versions/5.json Normal file
View File

@ -0,0 +1 @@
{"version": "5", "root": "", "base": {"root": "", "schema": "/schema", "schema.version": "/schema/version", "config": "/config", "config.maintenance": "/config/maintenance", "config.primary_node": "/config/primary_node", "config.primary_node.sync_lock": "/config/primary_node/sync_lock", "config.upstream_ip": "/config/upstream_ip", "config.migration_target_selector": "/config/migration_target_selector", "cmd": "/cmd", "cmd.node": "/cmd/nodes", "cmd.domain": "/cmd/domains", "cmd.ceph": "/cmd/ceph", "logs": "/logs", "node": "/nodes", "domain": "/domains", "network": "/networks", "storage": "/ceph", "storage.util": "/ceph/util", "osd": "/ceph/osds", "pool": "/ceph/pools", "volume": "/ceph/volumes", "snapshot": "/ceph/snapshots"}, "logs": {"node": "", "messages": "/messages"}, "node": {"name": "", "keepalive": "/keepalive", "mode": "/daemonmode", "data.active_schema": "/activeschema", "data.latest_schema": "/latestschema", "data.static": "/staticdata", "data.pvc_version": "/pvcversion", "running_domains": "/runningdomains", "count.provisioned_domains": "/domainscount", "count.networks": "/networkscount", "state.daemon": "/daemonstate", "state.router": "/routerstate", "state.domain": "/domainstate", "cpu.load": "/cpuload", "vcpu.allocated": "/vcpualloc", "memory.total": "/memtotal", "memory.used": "/memused", "memory.free": "/memfree", "memory.allocated": "/memalloc", "memory.provisioned": "/memprov", "ipmi.hostname": "/ipmihostname", "ipmi.username": "/ipmiusername", "ipmi.password": "/ipmipassword", "sriov": "/sriov", "sriov.pf": "/sriov/pf", "sriov.vf": "/sriov/vf"}, "sriov_pf": {"phy": "", "mtu": "/mtu", "vfcount": "/vfcount"}, "sriov_vf": {"phy": "", "pf": "/pf", "mtu": "/mtu", "mac": "/mac", "phy_mac": "/phy_mac", "config": "/config", "config.vlan_id": "/config/vlan_id", "config.vlan_qos": "/config/vlan_qos", "config.tx_rate_min": "/config/tx_rate_min", "config.tx_rate_max": "/config/tx_rate_max", "config.spoof_check": "/config/spoof_check", "config.link_state": "/config/link_state", "config.trust": "/config/trust", "config.query_rss": "/config/query_rss", "pci": "/pci", "pci.domain": "/pci/domain", "pci.bus": "/pci/bus", "pci.slot": "/pci/slot", "pci.function": "/pci/function", "used": "/used", "used_by": "/used_by"}, "domain": {"name": "", "xml": "/xml", "state": "/state", "profile": "/profile", "stats": "/stats", "node": "/node", "last_node": "/lastnode", "failed_reason": "/failedreason", "storage.volumes": "/rbdlist", "console.log": "/consolelog", "console.vnc": "/vnc", "meta.autostart": "/node_autostart", "meta.migrate_method": "/migration_method", "meta.node_selector": "/node_selector", "meta.node_limit": "/node_limit", "meta.tags": "/tags", "migrate.sync_lock": "/migrate_sync_lock"}, "tag": {"name": "", "type": "/type", "protected": "/protected"}, "network": {"vni": "", "type": "/nettype", "rule": "/firewall_rules", "rule.in": "/firewall_rules/in", "rule.out": "/firewall_rules/out", "nameservers": "/name_servers", "domain": "/domain", "reservation": "/dhcp4_reservations", "lease": "/dhcp4_leases", "ip4.gateway": "/ip4_gateway", "ip4.network": "/ip4_network", "ip4.dhcp": "/dhcp4_flag", "ip4.dhcp_start": "/dhcp4_start", "ip4.dhcp_end": "/dhcp4_end", "ip6.gateway": "/ip6_gateway", "ip6.network": "/ip6_network", "ip6.dhcp": "/dhcp6_flag"}, "reservation": {"mac": "", "ip": "/ipaddr", "hostname": "/hostname"}, "lease": {"mac": "", "ip": "/ipaddr", "hostname": "/hostname", "expiry": "/expiry", "client_id": "/clientid"}, "rule": {"description": "", "rule": "/rule", "order": "/order"}, "osd": {"id": "", "node": "/node", "device": "/device", "db_device": "/db_device", "stats": "/stats"}, "pool": {"name": "", "pgs": "/pgs", "stats": "/stats"}, "volume": {"name": "", "stats": "/stats"}, "snapshot": {"name": "", "stats": "/stats"}}

3
daemon-common/zkhandler.py
View File

@ -466,7 +466,7 @@ class ZKHandler(object):
#
class ZKSchema(object):
# Current version
_version = 4
_version = 5
# Root for doing nested keys
_schema_root = ''
@ -636,6 +636,7 @@ class ZKSchema(object):
'id': '', # The root key
'node': '/node',
'device': '/device',
'db_device': '/db_device',
'stats': '/stats'
},
# The schema of an individual pool entry (/ceph/pools/{pool_name})

116
docs/manuals/swagger.json
View File

@ -520,6 +520,14 @@
},
"osd": {
"properties": {
"db_device": {
"description": "The OSD database/WAL block device (logical volume); empty if not applicable",
"type": "string"
},
"device": {
"description": "The OSD data block device",
"type": "string"
},
"id": {
"description": "The Ceph ID of the OSD",
"type": "string (containing integer)"
@ -5011,6 +5019,13 @@
"name": "weight",
"required": true,
"type": "number"
},
{
"description": "Whether to use an external OSD DB LV device",
"in": "query",
"name": "ext_db",
"required": false,
"type": "boolean"
}
],
"responses": {
@ -5133,6 +5148,45 @@
]
}
},
"/api/v1/storage/ceph/osddb": {
"post": {
"description": "Note: This task may take up to 30s to complete and return",
"parameters": [
{
"description": "The PVC node to create the OSD DB volume group on",
"in": "query",
"name": "node",
"required": true,
"type": "string"
},
{
"description": "The block device (e.g. \"/dev/sdb\", \"/dev/disk/by-path/...\", etc.) to create the OSD DB volume group on",
"in": "query",
"name": "device",
"required": true,
"type": "string"
}
],
"responses": {
"200": {
"description": "OK",
"schema": {
"$ref": "#/definitions/Message"
}
},
"400": {
"description": "Bad request",
"schema": {
"$ref": "#/definitions/Message"
}
}
},
"summary": "Add a Ceph OSD database volume group to the cluster",
"tags": [
"storage / ceph"
]
}
},
"/api/v1/storage/ceph/pool": {
"get": {
"description": "",
@ -6248,6 +6302,68 @@
]
}
},
"/api/v1/vm/{vm}/device": {
"delete": {
"description": "",
"parameters": [
{
"description": "The raw Libvirt XML definition of the device to detach",
"in": "query",
"name": "xml",
"required": true,
"type": "string"
}
],
"responses": {
"200": {
"description": "OK",
"schema": {
"$ref": "#/definitions/Message"
}
},
"400": {
"description": "Bad request",
"schema": {
"$ref": "#/definitions/Message"
}
}
},
"summary": "Hot-detach device XML to {vm}",
"tags": [
"vm"
]
},
"post": {
"description": "",
"parameters": [
{
"description": "The raw Libvirt XML definition of the device to attach",
"in": "query",
"name": "xml",
"required": true,
"type": "string"
}
],
"responses": {
"200": {
"description": "OK",
"schema": {
"$ref": "#/definitions/Message"
}
},
"400": {
"description": "Bad request",
"schema": {
"$ref": "#/definitions/Message"
}
}
},
"summary": "Hot-attach device XML to {vm}",
"tags": [
"vm"
]
}
},
"/api/v1/vm/{vm}/locks": {
"post": {
"description": "",

149
node-daemon/pvcnoded/objects/CephInstance.py
View File

@ -25,6 +25,8 @@ import psutil
import daemon_lib.common as common
from distutils.util import strtobool
class CephOSDInstance(object):
def __init__(self, zkhandler, this_node, osd_id):
@ -66,7 +68,7 @@ class CephOSDInstance(object):
self.stats = json.loads(data)
@staticmethod
def add_osd(zkhandler, logger, node, device, weight):
def add_osd(zkhandler, logger, node, device, weight, ext_db_flag=False):
# 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:
@ -96,12 +98,26 @@ class CephOSDInstance(object):
print(stderr)
raise
# 3b. Create the OSD for real
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, osd_size_bytes)
if not result:
raise
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 --data {device}'.format(
'ceph-volume lvm prepare --bluestore {devices}'.format(
osdid=osd_id,
device=device
devices=dev_flags
)
)
if retcode:
@ -177,6 +193,7 @@ class CephOSDInstance(object):
(('osd', osd_id), ''),
(('osd.node', osd_id), node),
(('osd.device', osd_id), device),
(('osd.db_device', osd_id), db_device),
(('osd.stats', osd_id), '{}'),
])
@ -270,7 +287,13 @@ class CephOSDInstance(object):
print(stderr)
raise
# 7. Delete OSD from ZK
# 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)
@ -282,6 +305,93 @@ class CephOSDInstance(object):
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):
logger.out('Creating new OSD database volume group on block device {}'.format(device), state='i')
try:
# 0. 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
# 1. Create an empty partition table
logger.out('Creating empty partiton table on block device {}'.format(device), state='i')
retcode, stdout, stderr = common.run_os_command(
'echo -e "o\ny\nn\n\n\n\n8e00\nw\ny\n" | sudo gdisk {}'.format(device)
)
if retcode:
print('gdisk partitioning')
print(stdout)
print(stderr)
raise
# 2. Create the PV
logger.out('Creating PV on block device {}1'.format(device), state='i')
retcode, stdout, stderr = common.run_os_command(
'pvcreate --force {}1'.format(device)
)
if retcode:
print('pv creation')
print(stdout)
print(stderr)
raise
# 2. Create the VG (named 'osd-db')
logger.out('Creating VG "osd-db" on block device {}1'.format(device), state='i')
retcode, stdout, stderr = common.run_os_command(
'vgcreate --force osd-db {}1'.format(device)
)
if retcode:
print('vg creation')
print(stdout)
print(stderr)
raise
# 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, 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 (5% of OSD size, in MB)
osd_db_size = int(osd_size_bytes * 0.05 / 1024 / 1024)
# 2. Create the LV
logger.out('Creating LV "osd-db/osd-{}"'.format(osd_id), 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
# 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, this_node, name):
@ -379,13 +489,14 @@ def ceph_command(zkhandler, logger, this_node, data, d_osd):
# Adding a new OSD
if command == 'osd_add':
node, device, weight = args.split(',')
node, 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.add_osd(zkhandler, logger, node, device, weight)
result = CephOSDInstance.add_osd(zkhandler, logger, node, device, weight, ext_db_flag)
# Command succeeded
if result:
# Update the command queue
@ -426,3 +537,27 @@ def ceph_command(zkhandler, logger, this_node, data, d_osd):
])
# 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)