def ensure_ceph_storage(service,
pool,
rbd_img,
sizemb,
mount_point,
blk_device,
fstype,
system_services=[],
rbd_pool_replicas=2):
"""
To be called from the current cluster leader.
Ensures given pool and RBD image exists, is mapped to a block device,
and the device is formatted and mounted at the given mount_point.
If formatting a device for the first time, data existing at mount_point
will be migrated to the RBD device before being remounted.
All services listed in system_services will be stopped prior to data
migration and restarted when complete.
"""
# Ensure pool, RBD image, RBD mappings are in place.
if not pool_exists(service, pool):
utils.juju_log('INFO', 'ceph: Creating new pool %s.' % pool)
create_pool(service, pool, replicas=rbd_pool_replicas)
if not rbd_exists(service, pool, rbd_img):
utils.juju_log('INFO', 'ceph: Creating RBD image (%s).' % rbd_img)
create_rbd_image(service, pool, rbd_img, sizemb)
if not image_mapped(rbd_img):
utils.juju_log('INFO', 'ceph: Mapping RBD Image as a Block Device.')
map_block_storage(service, pool, rbd_img)
# make file system
# TODO: What happens if for whatever reason this is run again and
# the data is already in the rbd device and/or is mounted??
# When it is mounted already, it will fail to make the fs
# XXX: This is really sketchy! Need to at least add an fstab entry
# otherwise this hook will blow away existing data if its executed
# after a reboot.
if not filesystem_mounted(mount_point):
make_filesystem(blk_device, fstype)
for svc in system_services:
if utils.running(svc):
utils.juju_log(
'INFO', 'Stopping services %s prior to migrating '
'data' % svc)
utils.stop(svc)
place_data_on_ceph(service, blk_device, mount_point, fstype)
for svc in system_services:
utils.start(svc)
def ensure_ceph_storage(service, pool, rbd_img, sizemb, mount_point,
blk_device, fstype, system_services=[],
rbd_pool_replicas=2):
"""
To be called from the current cluster leader.
Ensures given pool and RBD image exists, is mapped to a block device,
and the device is formatted and mounted at the given mount_point.
If formatting a device for the first time, data existing at mount_point
will be migrated to the RBD device before being remounted.
All services listed in system_services will be stopped prior to data
migration and restarted when complete.
"""
# Ensure pool, RBD image, RBD mappings are in place.
if not pool_exists(service, pool):
utils.juju_log('INFO', 'ceph: Creating new pool %s.' % pool)
create_pool(service, pool, replicas=rbd_pool_replicas)
if not rbd_exists(service, pool, rbd_img):
utils.juju_log('INFO', 'ceph: Creating RBD image (%s).' % rbd_img)
create_rbd_image(service, pool, rbd_img, sizemb)
if not image_mapped(rbd_img):
utils.juju_log('INFO', 'ceph: Mapping RBD Image as a Block Device.')
map_block_storage(service, pool, rbd_img)
# make file system
# TODO: What happens if for whatever reason this is run again and
# the data is already in the rbd device and/or is mounted??
# When it is mounted already, it will fail to make the fs
# XXX: This is really sketchy! Need to at least add an fstab entry
# otherwise this hook will blow away existing data if its executed
# after a reboot.
if not filesystem_mounted(mount_point):
make_filesystem(blk_device, fstype)
for svc in system_services:
if utils.running(svc):
utils.juju_log('INFO',
'Stopping services %s prior to migrating '
'data' % svc)
utils.stop(svc)
place_data_on_ceph(service, blk_device, mount_point, fstype)
for svc in system_services:
utils.start(svc)
def ceph_changed():
utils.juju_log('INFO', 'Start Ceph Relation Changed')
auth = utils.relation_get('auth')
key = utils.relation_get('key')
use_syslog = utils.relation_get('use_syslog')
if None in [auth, key]:
utils.juju_log('INFO', 'Missing key or auth in relation')
return
ceph.configure(service=SERVICE_NAME,
key=key,
auth=auth,
use_syslog=use_syslog)
if cluster.eligible_leader(LEADER_RES):
sizemb = int(utils.config_get('block-size')) * 1024
rbd_img = utils.config_get('rbd-name')
blk_device = '/dev/rbd/%s/%s' % (POOL_NAME, rbd_img)
rbd_pool_rep_count = utils.config_get('ceph-osd-replication-count')
ceph.ensure_ceph_storage(service=SERVICE_NAME,
pool=POOL_NAME,
rbd_img=rbd_img,
sizemb=sizemb,
fstype='ext4',
mount_point=DATA_SRC_DST,
blk_device=blk_device,
system_services=['mysql'],
rbd_pool_replicas=rbd_pool_rep_count)
else:
utils.juju_log('INFO',
'This is not the peer leader. Not configuring RBD.')
# Stopping MySQL
if utils.running('mysql'):
utils.juju_log('INFO', 'Stopping MySQL...')
utils.stop('mysql')
# If 'ha' relation has been made before the 'ceph' relation
# it is important to make sure the ha-relation data is being
# sent.
if utils.is_relation_made('ha'):
utils.juju_log(
'INFO', '*ha* relation exists. Making sure the ha'
' relation data is sent.')
ha_relation_joined()
return
utils.juju_log('INFO', 'Finish Ceph Relation Changed')
def ceph_changed():
utils.juju_log("INFO", "Start Ceph Relation Changed")
auth = utils.relation_get("auth")
key = utils.relation_get("key")
use_syslog = utils.relation_get("use_syslog")
if None in [auth, key]:
utils.juju_log("INFO", "Missing key or auth in relation")
return
ceph.configure(service=SERVICE_NAME, key=key, auth=auth, use_syslog=use_syslog)
if cluster.eligible_leader(LEADER_RES):
sizemb = int(utils.config_get("block-size")) * 1024
rbd_img = utils.config_get("rbd-name")
blk_device = "/dev/rbd/%s/%s" % (POOL_NAME, rbd_img)
rbd_pool_rep_count = utils.config_get("ceph-osd-replication-count")
ceph.ensure_ceph_storage(
service=SERVICE_NAME,
pool=POOL_NAME,
rbd_img=rbd_img,
sizemb=sizemb,
fstype="ext4",
mount_point=DATA_SRC_DST,
blk_device=blk_device,
system_services=["mysql"],
rbd_pool_replicas=rbd_pool_rep_count,
)
else:
utils.juju_log("INFO", "This is not the peer leader. Not configuring RBD.")
# Stopping MySQL
if utils.running("mysql"):
utils.juju_log("INFO", "Stopping MySQL...")
utils.stop("mysql")
# If 'ha' relation has been made before the 'ceph' relation
# it is important to make sure the ha-relation data is being
# sent.
if utils.is_relation_made("ha"):
utils.juju_log("INFO", "*ha* relation exists. Making sure the ha" " relation data is sent.")
ha_relation_joined()
return
utils.juju_log("INFO", "Finish Ceph Relation Changed")
def ceph_changed():
utils.juju_log('INFO', 'Start Ceph Relation Changed')
auth = utils.relation_get('auth')
key = utils.relation_get('key')
use_syslog = utils.relation_get('use_syslog')
if None in [auth, key]:
utils.juju_log('INFO', 'Missing key or auth in relation')
return
ceph.configure(service=SERVICE_NAME, key=key, auth=auth,
use_syslog=use_syslog)
if cluster.eligible_leader(LEADER_RES):
sizemb = int(utils.config_get('block-size')) * 1024
rbd_img = utils.config_get('rbd-name')
blk_device = '/dev/rbd/%s/%s' % (POOL_NAME, rbd_img)
rbd_pool_rep_count = utils.config_get('ceph-osd-replication-count')
ceph.ensure_ceph_storage(service=SERVICE_NAME, pool=POOL_NAME,
rbd_img=rbd_img, sizemb=sizemb,
fstype='ext4', mount_point=DATA_SRC_DST,
blk_device=blk_device,
system_services=['mysql'],
rbd_pool_replicas=rbd_pool_rep_count)
else:
utils.juju_log('INFO',
'This is not the peer leader. Not configuring RBD.')
# Stopping MySQL
if utils.running('mysql'):
utils.juju_log('INFO', 'Stopping MySQL...')
utils.stop('mysql')
# If 'ha' relation has been made before the 'ceph' relation
# it is important to make sure the ha-relation data is being
# sent.
if utils.is_relation_made('ha'):
utils.juju_log('INFO',
'*ha* relation exists. Making sure the ha'
' relation data is sent.')
ha_relation_joined()
return
utils.juju_log('INFO', 'Finish Ceph Relation Changed')
