def get_disk_for_user(user_email):
JBoxEBSVol.log_debug("creating EBS volume for %s", user_email)
disk_id = JBoxEBSVol._reserve_disk_id()
if disk_id is None:
raise Exception("No free disk available")
try:
existing_disk = JBoxDiskState(cluster_id=CompEC2.INSTALL_ID,
region_id=CompEC2.REGION,
user_id=user_email)
except Exception as ex:
JBoxEBSVol.log_debug("No existing disk for %s. Exception %r",
user_email, ex)
existing_disk = None
if existing_disk is None:
sess_id = unique_sessname(user_email)
sess_props = JBoxSessionProps(Compute.get_install_id(),
sess_id,
create=True,
user_id=user_email)
if sess_props.is_new:
sess_props.save()
snap_id = sess_props.get_snapshot_id()
if snap_id is None:
snap_id = JBoxEBSVol.DISK_TEMPLATE_SNAPSHOT
JBoxEBSVol.log_debug("will use snapshot id %s for %s", snap_id,
user_email)
dev_path, vol_id = EBSVol.create_new_volume(
snap_id,
disk_id,
tag=user_email,
disk_sz_gb=JBoxEBSVol.DISK_LIMIT)
existing_disk = JBoxDiskState(cluster_id=CompEC2.INSTALL_ID,
region_id=CompEC2.REGION,
user_id=user_email,
volume_id=vol_id,
attach_time=None,
create=True)
else:
dev_path = EBSVol.attach_volume(existing_disk.get_volume_id(),
disk_id)
existing_disk.set_state(JBoxDiskState.STATE_ATTACHING)
existing_disk.save()
return JBoxEBSVol(dev_path, user_email=user_email)
def get_disk_for_user(user_email):
JBoxEBSVol.log_debug("creating EBS volume for %s", user_email)
disk_id = JBoxEBSVol._reserve_disk_id()
if disk_id is None:
raise Exception("No free disk available")
try:
existing_disk = JBoxDiskState(cluster_id=CompEC2.INSTALL_ID, region_id=CompEC2.REGION,
user_id=user_email)
except Exception as ex:
JBoxEBSVol.log_debug("No existing disk for %s. Exception %r", user_email, ex)
existing_disk = None
if existing_disk is None:
sess_id = unique_sessname(user_email)
sess_props = JBoxSessionProps(Compute.get_install_id(), sess_id, create=True, user_id=user_email)
if sess_props.is_new:
sess_props.save()
snap_id = sess_props.get_snapshot_id()
if snap_id is None:
snap_id = JBoxEBSVol.DISK_TEMPLATE_SNAPSHOT
JBoxEBSVol.log_debug("will use snapshot id %s for %s", snap_id, user_email)
dev_path, vol_id = EBSVol.create_new_volume(snap_id, disk_id, tag=user_email,
disk_sz_gb=JBoxEBSVol.DISK_LIMIT)
existing_disk = JBoxDiskState(cluster_id=CompEC2.INSTALL_ID, region_id=CompEC2.REGION,
user_id=user_email,
volume_id=vol_id,
attach_time=None,
create=True)
else:
dev_path = EBSVol.attach_volume(existing_disk.get_volume_id(), disk_id)
existing_disk.set_state(JBoxDiskState.STATE_ATTACHING)
existing_disk.save()
return JBoxEBSVol(dev_path, user_email=user_email)
class JBoxEBSVol(JBoxVol):
provides = [JBoxVol.JBP_DATA_EBS, JBoxVol.JBP_DATA]
DEVICES = []
MAX_DISKS = 0
DISK_LIMIT = None
DISK_USE_STATUS = {}
DISK_RESERVE_TIME = {}
DISK_TEMPLATE_SNAPSHOT = None
LOCK = None
@staticmethod
def configure():
num_disks_max = JBoxCfg.get('numdisksmax')
JBoxEBSVol.DISK_LIMIT = 10
JBoxEBSVol.MAX_DISKS = num_disks_max
JBoxEBSVol.DISK_TEMPLATE_SNAPSHOT = JBoxCfg.get(
'cloud_host.ebs_template')
JBoxEBSVol.DEVICES = JBoxEBSVol._guess_configured_devices(
'xvd', num_disks_max)
JBoxEBSVol.log_debug(
"Assuming %d EBS volumes configured in range xvdba..xvdcz",
len(JBoxEBSVol.DEVICES))
JBoxEBSVol.LOCK = threading.Lock()
JBoxEBSVol.refresh_disk_use_status()
@classmethod
def get_disk_allocated_size(cls):
return JBoxEBSVol.DISK_LIMIT * 1000000000
@staticmethod
def _guess_configured_devices(devidpfx, num_disks):
devices = []
for pfx1 in 'bc':
for pfx2 in ascii_lowercase:
devices.append(devidpfx + pfx1 + pfx2)
if len(devices) == num_disks:
return devices
return devices
@staticmethod
def refresh_disk_use_status(container_id_list=None):
JBoxEBSVol.log_debug("Refrshing EBS disk use status")
JBoxEBSVol.LOCK.acquire()
try:
nfree = 0
for idx in range(0, JBoxEBSVol.MAX_DISKS):
dev = JBoxEBSVol.DEVICES[idx]
if JBoxEBSVol._is_reserved(dev):
JBoxEBSVol.DISK_USE_STATUS[dev] = True
else:
JBoxEBSVol.DISK_USE_STATUS[dev] = False
nfree += 1
for device, volume in JBoxEBSVol.get_mapped_volumes().iteritems():
JBoxEBSVol.DISK_USE_STATUS[os.path.basename(device)] = True
nfree -= 1
JBoxEBSVol.log_info("EBS Disk free: " + str(nfree) + "/" +
str(JBoxEBSVol.MAX_DISKS))
except:
JBoxEBSVol.log_exception("Exception refrshing EBS disk use status")
finally:
JBoxEBSVol.LOCK.release()
@staticmethod
def get_mapped_volumes():
allmaps = EBSVol.get_mapped_volumes()
JBoxEBSVol.log_debug("Devices mapped: %r", allmaps)
return dict((d, v) for d, v in allmaps.iteritems()
if os.path.basename(d) in JBoxEBSVol.DEVICES)
@staticmethod
def _get_unused_disk_id():
for idx in range(0, JBoxEBSVol.MAX_DISKS):
dev = JBoxEBSVol.DEVICES[idx]
if not JBoxEBSVol.DISK_USE_STATUS[dev]:
return dev
return None
@staticmethod
def _is_reserved(idx):
if (idx in JBoxEBSVol.DISK_RESERVE_TIME) and (
JBoxEBSVol.DISK_RESERVE_TIME[idx] < time.time()):
del JBoxEBSVol.DISK_RESERVE_TIME[idx]
return idx in JBoxEBSVol.DISK_RESERVE_TIME
@staticmethod
def _mark_disk_used(idx, used=True, for_secs=0):
JBoxEBSVol.DISK_USE_STATUS[idx] = used
if used and (for_secs > 0):
JBoxEBSVol.DISK_RESERVE_TIME[idx] = time.time() + for_secs
else:
if idx in JBoxEBSVol.DISK_RESERVE_TIME:
del JBoxEBSVol.DISK_RESERVE_TIME[idx]
@staticmethod
def _reserve_disk_id():
JBoxEBSVol.LOCK.acquire()
try:
disk_id = JBoxEBSVol._get_unused_disk_id()
JBoxEBSVol._mark_disk_used(disk_id, for_secs=120)
return disk_id
finally:
JBoxEBSVol.LOCK.release()
@staticmethod
def is_mount_path(fs_path):
# EBS volumes are not mounted on host
return False
@staticmethod
def disk_ids_used_pct():
pct = (sum(JBoxEBSVol.DISK_USE_STATUS.values()) * 100) / len(
JBoxEBSVol.DISK_USE_STATUS)
return min(100, max(0, pct))
@staticmethod
def get_disk_for_user(user_email):
JBoxEBSVol.log_debug("creating EBS volume for %s", user_email)
disk_id = JBoxEBSVol._reserve_disk_id()
if disk_id is None:
raise Exception("No free disk available")
try:
existing_disk = JBoxDiskState(cluster_id=CompEC2.INSTALL_ID,
region_id=CompEC2.REGION,
user_id=user_email)
except Exception, ex:
JBoxEBSVol.log_debug("No existing disk for %s. Exception %r",
user_email, ex)
existing_disk = None
if existing_disk is None:
sess_id = unique_sessname(user_email)
sess_props = JBoxSessionProps(sess_id,
create=True,
user_id=user_email)
if sess_props.is_new:
sess_props.save()
snap_id = sess_props.get_snapshot_id()
if snap_id is None:
snap_id = JBoxEBSVol.DISK_TEMPLATE_SNAPSHOT
JBoxEBSVol.log_debug("will use snapshot id %s for %s", snap_id,
user_email)
dev_path, vol_id = EBSVol.create_new_volume(
snap_id,
disk_id,
tag=user_email,
disk_sz_gb=JBoxEBSVol.DISK_LIMIT)
existing_disk = JBoxDiskState(cluster_id=CompEC2.INSTALL_ID,
region_id=CompEC2.REGION,
user_id=user_email,
volume_id=vol_id,
attach_time=None,
create=True)
else:
dev_path = EBSVol.attach_volume(existing_disk.get_volume_id(),
disk_id)
existing_disk.set_state(JBoxDiskState.STATE_ATTACHING)
existing_disk.save()
return JBoxEBSVol(dev_path, user_email=user_email)
