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František Řezníček
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""" OpenStack migrator - ceph library """
import json
import os.path
from lib import remote_cmd_exec, log_or_assert
def get_ceph_client_name(args, ceph_src_pool_name, ceph_dst_pool_name=None):
""" identify which ceph user to use for planned ceph operation """
int_pool_name = ceph_dst_pool_name if ceph_dst_pool_name else ceph_src_pool_name
return "client.cinder" if int_pool_name in (args.source_ceph_cinder_pool_name, args.source_ceph_ephemeral_pool_name,) else "client.migrator"
def ceph_rbd_images_list(args, pool_name):
""" list ceph RBD images in pool named pool_name """
script_path = os.path.join(args.ceph_migrator_host_base_dir, 'ceph-rbd-images-list.sh')
stdout, _, ecode = remote_cmd_exec(args.ceph_migrator_host,
args.ceph_migrator_user,
args.ceph_migrator_sshkeyfile.name,
f"{script_path} {pool_name}")
assert stdout, f"RBD pool ({pool_name}) images received successfully (non-empty RBD list)"
assert ecode == 0, f"RBD pool ({pool_name}) images received successfully (ecode)"
return stdout.splitlines()
def ceph_rbd_image_info(args, pool_name, rbd_image_name):
""" get ceph RBD image information """
ceph_client_name = get_ceph_client_name(args, pool_name)
script_path = os.path.join(args.ceph_migrator_host_base_dir, 'ceph-rbd-image-info.sh')
stdout, stderr, ecode = remote_cmd_exec(args.ceph_migrator_host,
args.ceph_migrator_user,
args.ceph_migrator_sshkeyfile.name,
f"CEPH_USER={ceph_client_name} {script_path} {pool_name} {rbd_image_name}")
return json.loads(stdout), stderr, ecode
def ceph_rbd_image_exists(args, pool_name, rbd_image_name):
""" detect whether RBD image {pool_name}/{rbd_image_name} exists """
ceph_client_name = get_ceph_client_name(args, pool_name)
script_path = os.path.join(args.ceph_migrator_host_base_dir, 'ceph-rbd-image-exists.sh')
stdout, stderr, ecode = remote_cmd_exec(args.ceph_migrator_host,
args.ceph_migrator_user,
args.ceph_migrator_sshkeyfile.name,
f"CEPH_USER={ceph_client_name} {script_path} {pool_name} {rbd_image_name}")
return stdout.splitlines(), stderr, ecode
def ceph_rbd_image_delete(args, pool_name, rbd_image_name):
""" delete RBD image {pool_name}/{rbd_image_name} """
ceph_client_name = get_ceph_client_name(args, pool_name)
script_path = os.path.join(args.ceph_migrator_host_base_dir, 'ceph-rbd-image-delete.sh')
stdout, stderr, ecode = remote_cmd_exec(args.ceph_migrator_host,
args.ceph_migrator_user,
args.ceph_migrator_sshkeyfile.name,
f"CEPH_USER={ceph_client_name} {script_path} {pool_name} {rbd_image_name}")
return stdout.splitlines(), stderr, ecode
def ceph_rbd_image_flatten(args, pool_name, rbd_image_name):
""" flatten RBD image {pool_name}/{rbd_image_name} """
ceph_client_name = get_ceph_client_name(args, pool_name)
script_path = os.path.join(args.ceph_migrator_host_base_dir, 'ceph-rbd-image-flatten.sh')
stdout, stderr, ecode = remote_cmd_exec(args.ceph_migrator_host,
args.ceph_migrator_user,
args.ceph_migrator_sshkeyfile.name,
f"CEPH_USER={ceph_client_name} {script_path} {pool_name} {rbd_image_name}")
return stdout.splitlines(), stderr, ecode
def ceph_rbd_image_clone(args, src_pool_name, src_rbd_image_name, src_rbd_image_snapshot_name,
dst_pool_name, dst_rbd_image_name):
""" clone RBD image {src_pool_name}/{src_rbd_image_name}@{src_rbd_image_snapshot_name} -> {dst_pool_name}/{dst_rbd_image_name}"""
ceph_client_name = get_ceph_client_name(args, src_pool_name, dst_pool_name)
script_path = os.path.join(args.ceph_migrator_host_base_dir, 'ceph-rbd-image-clone.sh')
stdout, stderr, ecode = remote_cmd_exec(args.ceph_migrator_host,
args.ceph_migrator_user,
args.ceph_migrator_sshkeyfile.name,
f"CEPH_USER={ceph_client_name} {script_path} {src_pool_name} {src_rbd_image_name} {src_rbd_image_snapshot_name} {dst_pool_name} {dst_rbd_image_name}")
return stdout.splitlines(), stderr, ecode
def ceph_rbd_image_copy(args, src_pool_name, src_rbd_image_name, dst_pool_name, dst_rbd_image_name):
""" copy RBD image {src_pool_name}/{src_rbd_image_name} -> {dst_pool_name}/{dst_rbd_image_name}"""
ceph_client_name = get_ceph_client_name(args, src_pool_name, dst_pool_name)
script_path = os.path.join(args.ceph_migrator_host_base_dir, 'ceph-rbd-image-copy.sh')
cmd = f"CEPH_USER={ceph_client_name} {script_path} {src_pool_name} {src_rbd_image_name} {dst_pool_name} {dst_rbd_image_name}"
stdout, stderr, ecode = remote_cmd_exec(args.ceph_migrator_host,
args.ceph_migrator_user,
args.ceph_migrator_sshkeyfile.name,
cmd)
return stdout.splitlines(), stderr, ecode
def ceph_rbd_image_snapshot_exists(args, pool_name, rbd_image_name, rbd_image_snapshot_name):
""" detect whether RBD image snapshot {pool_name}/{rbd_image_name}@{rbd_image_snapshot_name} exists """
ceph_client_name = get_ceph_client_name(args, pool_name)
script_path = os.path.join(args.ceph_migrator_host_base_dir, 'ceph-rbd-image-snapshot-exists.sh')
stdout, stderr, ecode = remote_cmd_exec(args.ceph_migrator_host,
args.ceph_migrator_user,
args.ceph_migrator_sshkeyfile.name,
f"CEPH_USER={ceph_client_name} {script_path} {pool_name} {rbd_image_name} {rbd_image_snapshot_name}")
return stdout.splitlines(), stderr, ecode
def ceph_rbd_image_snapshot_create(args, pool_name, rbd_image_name, rbd_image_snapshot_name):
""" create RBD image snapshot {pool_name}/{rbd_image_name}@{rbd_image_snapshot_name} """
ceph_client_name = get_ceph_client_name(args, pool_name)
script_path = os.path.join(args.ceph_migrator_host_base_dir, 'ceph-rbd-image-snapshot-create.sh')
stdout, stderr, ecode = remote_cmd_exec(args.ceph_migrator_host,
args.ceph_migrator_user,
args.ceph_migrator_sshkeyfile.name,
f"CEPH_USER={ceph_client_name} {script_path} {pool_name} {rbd_image_name} {rbd_image_snapshot_name}")
return stdout.splitlines(), stderr, ecode
def ceph_rbd_image_snapshot_delete(args, pool_name, rbd_image_name, rbd_image_snapshot_name):
""" delete RBD image snapshot {pool_name}/{rbd_image_name}@{rbd_image_snapshot_name} """
ceph_client_name = get_ceph_client_name(args, pool_name)
script_path = os.path.join(args.ceph_migrator_host_base_dir, 'ceph-rbd-image-snapshot-delete.sh')
stdout, stderr, ecode = remote_cmd_exec(args.ceph_migrator_host,
args.ceph_migrator_user,
args.ceph_migrator_sshkeyfile.name,
f"CEPH_USER={ceph_client_name} {script_path} {pool_name} {rbd_image_name} {rbd_image_snapshot_name}")
return stdout.splitlines(), stderr, ecode
def migrate_rbd_image(args, server_block_device_mapping):
""" migrate G1 ceph RBD image to G2 ceph """
## G1: detect existing G1 RBD image
#CEPH_USER=client.cinder ~/migrator/ceph-rbd-image-exists.sh prod-ephemeral-vms 0069e95e-e805-44ff-bab5-872424312ff6
source_server_rbd_images, stderr, ecode = ceph_rbd_image_exists(args,
server_block_device_mapping['source']['ceph_pool_name'],
server_block_device_mapping['source']['ceph_rbd_image_name'])
log_or_assert(args, "G.1 Source OpenStack VM RBD image exists - query succeeded", ecode == 0, locals())
log_or_assert(args, "G.1 Source OpenStack VM RBD image exists - single image returned",
source_server_rbd_images and len(source_server_rbd_images) == 1, locals())
source_server_rbd_image = source_server_rbd_images[0]
## G2: find volume
#CEPH_USER=client.migrator ~/migrator/ceph-rbd-image-exists.sh cloud-cinder-volumes-prod-brno <g2-rbd-image-name>
destination_server_rbd_images, stderr, ecode = ceph_rbd_image_exists(args,
server_block_device_mapping['destination']['ceph_pool_name'],
server_block_device_mapping['destination']['volume_id'])
log_or_assert(args, "G.2 Destination OpenStack VM RBD image exists - query succeeded", ecode == 0, locals())
log_or_assert(args, "G.2 Destination OpenStack VM RBD image exists - single image returned",
destination_server_rbd_images and len(destination_server_rbd_images) == 1, locals())
destination_server_rbd_image = destination_server_rbd_images[0]
## G1: create RBD image protected snapshot
#CEPH_USER=client.cinder ~/migrator/ceph-rbd-image-snapshot-exists.sh prod-ephemeral-vms 006e230e-df45-4f33-879b-19eada244489_disk migration-snap2 # 1
#CEPH_USER=client.cinder ~/migrator/ceph-rbd-image-snapshot-create.sh prod-ephemeral-vms 006e230e-df45-4f33-879b-19eada244489_disk migration-snap2 # 0
#CEPH_USER=client.cinder ~/migrator/ceph-rbd-image-snapshot-exists.sh prod-ephemeral-vms 006e230e-df45-4f33-879b-19eada244489_disk migration-snap2 # 0
source_rbd_image_snapshot_name = f"g1-g2-migration-{source_server_rbd_image}"
stdout, stderr, ecode = ceph_rbd_image_snapshot_exists(args,
server_block_device_mapping['source']['ceph_pool_name'],
source_server_rbd_image,
source_rbd_image_snapshot_name)
log_or_assert(args,
"G.3 Source OpenStack VM RBD image has non-colliding snapshot " \
f"({server_block_device_mapping['source']['ceph_pool_name']}/{source_server_rbd_image}@{source_rbd_image_snapshot_name})",
ecode != 0, locals())
stdout, stderr, ecode = ceph_rbd_image_snapshot_create(args,
server_block_device_mapping['source']['ceph_pool_name'],
source_server_rbd_image,
source_rbd_image_snapshot_name)
log_or_assert(args,
"G.4 Source OpenStack VM RBD image snapshot created " \
f"({server_block_device_mapping['source']['ceph_pool_name']}/{source_server_rbd_image}@{source_rbd_image_snapshot_name})",
ecode == 0, locals())
stdout, stderr, ecode = ceph_rbd_image_snapshot_exists(args,
server_block_device_mapping['source']['ceph_pool_name'],
source_server_rbd_image,
source_rbd_image_snapshot_name)
log_or_assert(args,
"G.5 Source OpenStack VM RBD image snapshot exists " \
f"({server_block_device_mapping['source']['ceph_pool_name']}/{source_server_rbd_image}@{source_rbd_image_snapshot_name})",
ecode == 0, locals())
## G2: delete RBD image
#CEPH_USER=client.migrator ~/migrator/ceph-rbd-image-delete.sh cloud-cinder-volumes-prod-brno <g2-rbd-image-name>
## G2: confirm volume is deleted
#CEPH_USER=client.migrator ~/migrator/ceph-rbd-image-exists.sh cloud-cinder-volumes-prod-brno <g2-rbd-image-name> # 1
stdout, stderr, ecode = ceph_rbd_image_delete(args,
server_block_device_mapping['destination']['ceph_pool_name'],
destination_server_rbd_image)
log_or_assert(args,
f"G.6 Destination OpenStack VM RBD image deletion succeeded ({server_block_device_mapping['destination']['ceph_pool_name']}/{destination_server_rbd_image})",
ecode == 0, locals())
stdout, stderr, ecode = ceph_rbd_image_exists(args,
server_block_device_mapping['destination']['ceph_pool_name'],
destination_server_rbd_image)
log_or_assert(args,
f"G.7 Destination OpenStack VM RBD image does not exist ({server_block_device_mapping['destination']['ceph_pool_name']}/{destination_server_rbd_image})",
ecode != 0, locals())
## G1: clone from snapshot
#CEPH_USER=client.cinder ~/migrator/ceph-rbd-image-clone.sh prod-ephemeral-vms 006e230e-df45-4f33-879b-19eada244489_disk migration-snap2 prod-ephemeral-vms migrated-006e230e-df45-4f33-879b-19eada244489_disk
#CEPH_USER=client.cinder ~/migrator/ceph-rbd-image-exists.sh prod-ephemeral-vms migrated-006e230e-df45-4f33-879b-19eada244489_disk
source_rbd_cloned_image_name = f"g1-g2-migration-{source_server_rbd_image}"
stdout, stderr, ecode = ceph_rbd_image_clone(args,
server_block_device_mapping['source']['ceph_pool_name'],
source_server_rbd_image,
source_rbd_image_snapshot_name,
server_block_device_mapping['source']['ceph_pool_name'],
source_rbd_cloned_image_name)
log_or_assert(args,
"G.8 Source OpenStack VM RBD image cloned succesfully " \
f"({server_block_device_mapping['source']['ceph_pool_name']}/{source_server_rbd_image}@{source_rbd_image_snapshot_name} -> {server_block_device_mapping['source']['ceph_pool_name']}/{source_rbd_cloned_image_name})",
ecode == 0, locals())
stdout, stderr, ecode = ceph_rbd_image_exists(args,
server_block_device_mapping['source']['ceph_pool_name'],
source_rbd_cloned_image_name)
log_or_assert(args,
f"G.9 Source OpenStack VM cloned RBD image exists ({server_block_device_mapping['source']['ceph_pool_name']}/{source_rbd_cloned_image_name})",
ecode == 0, locals())
## G1: flatten cloned RBD image
#CEPH_USER=client.cinder ~/migrator/ceph-rbd-image-flatten.sh prod-ephemeral-vms migrated-006e230e-df45-4f33-879b-19eada244489_disk
stdout, stderr, ecode = ceph_rbd_image_flatten(args,
server_block_device_mapping['source']['ceph_pool_name'],
source_rbd_cloned_image_name)
log_or_assert(args,
f"G.10 Source OpenStack VM cloned RBD image flatten successfully ({server_block_device_mapping['source']['ceph_pool_name']}/{source_rbd_cloned_image_name})",
ecode == 0, locals())
## G1->G2: copy RBD image to target pool
#CEPH_USER=client.migrator ~/migrator/ceph-rbd-image-copy.sh prod-ephemeral-vms migrated-006e230e-df45-4f33-879b-19eada244489_disk cloud-cinder-volumes-prod-brno <g2-rbd-image-name>
#CEPH_USER=client.migrator ~/migrator/ceph-rbd-image-exists.sh cloud-cinder-volumes-prod-brno <g2-rbd-image-name> # 0
stdout, stderr, ecode = ceph_rbd_image_copy(args,
server_block_device_mapping['source']['ceph_pool_name'],
source_rbd_cloned_image_name,
server_block_device_mapping['destination']['ceph_pool_name'],
destination_server_rbd_image)
log_or_assert(args,
"G.11 Source OpenStack VM RBD image copied G1 -> G2 succesfully" \
f"{server_block_device_mapping['source']['ceph_pool_name']}/{source_rbd_cloned_image_name} -> {server_block_device_mapping['destination']['ceph_pool_name']}/{destination_server_rbd_image}",
ecode == 0, locals())
stdout, stderr, ecode = ceph_rbd_image_exists(args,
server_block_device_mapping['destination']['ceph_pool_name'],
destination_server_rbd_image)
log_or_assert(args,
f"G.12 Destination OpenStack VM RBD image exists ({server_block_device_mapping['destination']['ceph_pool_name']}/{destination_server_rbd_image})",
ecode == 0, locals())
## G1: delete cloned RBD image
#CEPH_USER=client.cinder ~/migrator/ceph-rbd-image-delete.sh prod-ephemeral-vms migrated-006e230e-df45-4f33-879b-19eada244489_disk
stdout, stderr, ecode = ceph_rbd_image_delete(args,
server_block_device_mapping['source']['ceph_pool_name'],
source_rbd_cloned_image_name)
log_or_assert(args,
f"G.13 Source OpenStack VM RBD cloned image deletion succeeded ({server_block_device_mapping['source']['ceph_pool_name']}/{source_rbd_cloned_image_name})",
ecode == 0, locals())
stdout, stderr, ecode = ceph_rbd_image_exists(args,
server_block_device_mapping['source']['ceph_pool_name'],
source_rbd_cloned_image_name)
log_or_assert(args,
f"G.14 Source OpenStack VM cloned RBD image does not exist anymore ({server_block_device_mapping['source']['ceph_pool_name']}/{source_rbd_cloned_image_name})",
ecode != 0, locals())
## G1: remove created snapshot
#CEPH_USER=client.cinder ~/migrator/ceph-rbd-image-snapshot-exists.sh prod-ephemeral-vms 006e230e-df45-4f33-879b-19eada244489_disk migration-snap2 # 0
#CEPH_USER=client.cinder ~/migrator/ceph-rbd-image-snapshot-delete.sh prod-ephemeral-vms 006e230e-df45-4f33-879b-19eada244489_disk migration-snap2
#CEPH_USER=client.cinder ~/migrator/ceph-rbd-image-snapshot-exists.sh prod-ephemeral-vms 006e230e-df45-4f33-879b-19eada244489_disk migration-snap2 # 1
stdout, stderr, ecode = ceph_rbd_image_snapshot_exists(args,
server_block_device_mapping['source']['ceph_pool_name'],
source_server_rbd_image,
source_rbd_image_snapshot_name)
log_or_assert(args,
"G.15 Source OpenStack VM RBD image snapshot still exists " \
f"{server_block_device_mapping['source']['ceph_pool_name']}/{source_server_rbd_image}@{source_rbd_image_snapshot_name}",
ecode == 0, locals())
stdout, stderr, ecode = ceph_rbd_image_snapshot_delete(args,
server_block_device_mapping['source']['ceph_pool_name'],
source_server_rbd_image,
source_rbd_image_snapshot_name)
log_or_assert(args,
"G.16 Source OpenStack VM RBD image snapshot deletion succeeeded " \
f"{server_block_device_mapping['source']['ceph_pool_name']}/{source_server_rbd_image}@{source_rbd_image_snapshot_name}",
ecode == 0, locals())
stdout, stderr, ecode = ceph_rbd_image_snapshot_exists(args,
server_block_device_mapping['source']['ceph_pool_name'],
source_server_rbd_image,
source_rbd_image_snapshot_name)
log_or_assert(args,
"G.17 Source OpenStack VM RBD image snapshot does not exist anymore " \
f"{server_block_device_mapping['source']['ceph_pool_name']}/{source_server_rbd_image}@{source_rbd_image_snapshot_name}",
ecode != 0, locals())