def create_provider_groups(ctx):
ctx.status("creating provider groups")
obj_tbl = resource_models.get_table('object_names')
pg_tbl = resource_models.get_table('provider_groups')
object_type_id = get_object_type_map()['runm.provider_group']
sess = resource_models.get_session()
try:
for pg in ctx.deployment_config.provider_groups.values():
# Create the object lookup record
obj_rec = dict(
object_type=object_type_id,
uuid=pg.uuid,
name=pg.name,
)
ins = obj_tbl.insert().values(**obj_rec)
sess.execute(ins)
# Create the base provider group record
pg_rec = dict(
uuid=pg.uuid,
)
ins = pg_tbl.insert().values(**pg_rec)
sess.execute(ins)
sess.commit()
ctx.status_ok()
except Exception as err:
sess.rollback()
ctx.status_fail(err)
def _find_providers_with_any_caps(ctx, caps, limit=50):
"""Returns providers that have any of the supplied capabilities.
The SQL that is generated looks like this:
SELECT p.id, p.uuid
FROM providers AS p
JOIN provider_capabilities AS pc
ON p.id = pc.provider_id
WHERE pc.capability_id IN ($CAPABILITIES)
"""
p_tbl = resource_models.get_table('providers')
p_caps_tbl = resource_models.get_table('provider_capabilities')
cap_ids = [_cap_id_from_code(ctx, cap) for cap in caps]
p_to_p_caps = sa.join(
p_tbl,
p_caps_tbl,
p_tbl.c.id == p_caps_tbl.c.provider_id,
)
cols = [
p_tbl.c.id,
p_tbl.c.uuid,
]
sel = sa.select(cols).select_from(p_to_p_caps).where(
p_caps_tbl.c.capability_id.in_(cap_ids)).limit(limit)
sess = resource_models.get_session()
return {r[0]: r[1] for r in sess.execute(sel)}
def _cap_id_from_code(ctx, cap):
cap_tbl = resource_models.get_table('capabilities')
sel = sa.select([cap_tbl.c.id]).where(cap_tbl.c.code == cap)
sess = resource_models.get_session()
res = sess.execute(sel).fetchone()
if not res:
raise ValueError("Could not find ID for capability %s" % cap)
return res[0]
def _rc_id_from_code(ctx, resource_class):
rc_tbl = resource_models.get_table('resource_classes')
sel = sa.select([rc_tbl.c.id]).where(rc_tbl.c.code == resource_class)
sess = resource_models.get_session()
res = sess.execute(sel).fetchone()
if not res:
raise ValueError("Could not find ID for resource class %s" %
resource_class)
return res[0]
def get_object_type_map():
"""Returns a dict, keyed by object type string code, of internal object
type ID.
"""
global _OBJECT_TYPE_MAP
if _OBJECT_TYPE_MAP is not None:
return _OBJECT_TYPE_MAP
tbl = resource_models.get_table('object_types')
sel = sa.select([tbl.c.id, tbl.c.code])
sess = resource_models.get_session()
_OBJECT_TYPE_MAP = {r[1]: r[0] for r in sess.execute(sel)}
return _OBJECT_TYPE_MAP
def get_provider_type_map():
"""Returns a dict, keyed by provider type string code, of internal provider
type ID.
"""
global _PROVIDER_TYPE_MAP
if _PROVIDER_TYPE_MAP is not None:
return _PROVIDER_TYPE_MAP
tbl = resource_models.get_table('provider_types')
sel = sa.select([tbl.c.id, tbl.c.code])
sess = resource_models.get_session()
_PROVIDER_TYPE_MAP = {r[1]: r[0] for r in sess.execute(sel)}
return _PROVIDER_TYPE_MAP
def create_partitions(ctx):
ctx.status("creating partitions")
obj_tbl = resource_models.get_table('object_names')
part_tbl = resource_models.get_table('partitions')
object_type_id = get_object_type_map()['runm.partition']
sess = resource_models.get_session()
created = set()
try:
for p in ctx.deployment_config.providers.values():
part_uuid = p.partition.uuid
if part_uuid in created:
continue
# Create the object lookup record
obj_rec = dict(
object_type=object_type_id,
uuid=part_uuid,
name=p.partition.name,
)
ins = obj_tbl.insert().values(**obj_rec)
sess.execute(ins)
# Create the base provider group record
part_rec = dict(
uuid=part_uuid,
)
ins = part_tbl.insert().values(**part_rec)
sess.execute(ins)
created.add(part_uuid)
sess.commit()
ctx.status_ok()
except Exception as err:
sess.rollback()
ctx.status_fail(err)
def _find_providers_with_resource(ctx,
claim_time,
release_time,
resource_constraint,
exclude=None,
limit=50):
"""Queries for providers that have capacity for the requested amount of a
resource class and optionally meet resource-specific capability
constraints. The query is done in a claim start/end window.
The SQL generated for a resource constraint without the optional capability
constraint ends up looking like this:
SELECT p.id, p.uuid
FROM providers AS p
JOIN inventories AS i
ON p.id = i.provider_id
LEFT JOIN (
SELECT ai.provider_id, SUM(ai.used) AS total_used
FROM allocation_items AS ai
JOIN (
SELECT id AS allocation_id
FROM allocations
WHERE claim_time >= $CLAIM_START
AND release_time < $CLAIM_END
GROUP BY id
) AS allocs_in_window
ON ai.allocation_id = allocs_in_window
WHERE ai.resource_class_id = $RESOURCE_CLASS
) AS usages
ON i.provider_id = usages.provider_id
WHERE i.resource_class_id = $RESOURCE_CLASS
AND ((i.total - i.reserved) * i.allocation_ratio) >=
$RESOURCE_REQUEST_AMOUNT + COALESCE(usages.used, 0))
If the optional `exclude` argument is provided, we tack on a:
WHERE p.id NOT IN ($EXCLUDE)
clause. The `exclude` argument is populated when the capabilities
constraints that may have been previously processed identified some
providers that should be excluded (they met an "exclusion filter" -- i.e.
they matched for a 'forbid' specification in a constraint).
"""
p_tbl = resource_models.get_table('providers')
inv_tbl = resource_models.get_table('inventories')
alloc_tbl = resource_models.get_table('allocations')
alloc_item_tbl = resource_models.get_table('allocation_items')
rc_id = _rc_id_from_code(ctx, resource_constraint.resource_class)
alloc_window_cols = [
alloc_tbl.c.id.label('allocation_id'),
]
allocs_in_window_subq = sa.select(alloc_window_cols).where(
sa.and_(
alloc_tbl.c.claim_time >= claim_time,
alloc_tbl.c.release_time < release_time,
)).group_by(alloc_tbl.c.id)
allocs_in_window_subq = sa.alias(allocs_in_window_subq, "allocs_in_window")
usage_cols = [
alloc_item_tbl.c.provider_id,
func.sum(alloc_item_tbl.c.used).label('total_used'),
]
alloc_item_to_alloc_window = sa.outerjoin(
alloc_item_tbl, allocs_in_window_subq, alloc_item_tbl.c.allocation_id
== allocs_in_window_subq.c.allocation_id)
usage_subq = sa.select(usage_cols).select_from(
alloc_item_to_alloc_window).where(
alloc_item_tbl.c.resource_class_id == rc_id).group_by(
alloc_item_tbl.c.provider_id)
usage_subq = sa.alias(usage_subq, "usages")
join_to = p_tbl
if resource_constraint.capability_constraint:
cap_constraint = resource_constraint.capability_constraint
join_to = _select_add_capability_constraint(ctx, p_tbl, cap_constraint)
p_to_inv = sa.join(
join_to, inv_tbl,
sa.and_(
p_tbl.c.id == inv_tbl.c.provider_id,
inv_tbl.c.resource_class_id == rc_id,
))
inv_to_usage = sa.outerjoin(
p_to_inv, usage_subq,
inv_tbl.c.provider_id == usage_subq.c.provider_id)
cols = [
p_tbl.c.id,
p_tbl.c.uuid,
]
sel = sa.select(cols).select_from(inv_to_usage).where(
sa.and_(inv_tbl.c.resource_class_id == rc_id,
((inv_tbl.c.total - inv_tbl.c.reserved) *
inv_tbl.c.allocation_ratio) >=
(resource_constraint.max_amount +
func.coalesce(usage_subq.c.total_used, 0))))
if exclude:
sel = sel.where(~p_tbl.c.id.in_(set(exclude)))
sel = sel.limit(limit)
sess = resource_models.get_session()
return {r[0]: r[1] for r in sess.execute(sel)}
def create_providers(ctx):
obj_tbl = resource_models.get_table('object_names')
rc_tbl = resource_models.get_table('resource_classes')
cap_tbl = resource_models.get_table('capabilities')
part_tbl = resource_models.get_table('partitions')
pg_tbl = resource_models.get_table('provider_groups')
pg_members_tbl = resource_models.get_table('provider_group_members')
p_tbl = resource_models.get_table('providers')
p_caps_tbl = resource_models.get_table('provider_capabilities')
tree_tbl = resource_models.get_table('provider_trees')
inv_tbl = resource_models.get_table('inventories')
pd_tbl = resource_models.get_table('provider_distances')
dt_tbl = resource_models.get_table('distance_types')
d_tbl = resource_models.get_table('distances')
# in-process cache of partition name -> internal ID
part_ids = {}
# in-process cache of provider group name -> internal ID
pg_ids = {}
# in-process cache of resource class code -> internal ID
rc_ids = {}
# in-process cache of capability code -> internal ID
cap_ids = {}
# Hashmap of distance type code to internal ID
distance_type_ids = {}
# Hashmap of (distance_type_code, distance_code) to internal ID
distance_ids = {}
sess = resource_models.get_session()
ctx.status("caching provider group internal IDs")
for pg in ctx.deployment_config.provider_groups.values():
if pg.uuid in pg_ids:
pg_id = pg_ids[pg.uuid]
else:
# Not yet in cache... look up the provider group by UUID
sel = sa.select([pg_tbl.c.id]).where(pg_tbl.c.uuid == pg.uuid)
res = sess.execute(sel).fetchone()
pg_ids[pg.uuid] = res[0]
ctx.status_ok()
ctx.status("caching resource class and capability internal IDs")
for prof in ctx.deployment_config.profiles.values():
for rc_code in prof['inventory'].keys():
if rc_code not in rc_ids:
sel = sa.select([rc_tbl.c.id]).where(rc_tbl.c.code == rc_code)
res = sess.execute(sel).fetchone()
rc_id = res[0]
rc_ids[rc_code] = rc_id
for cap_code in prof['capabilities']:
if cap_code not in cap_ids:
sel = sa.select([cap_tbl.c.id]).where(
cap_tbl.c.code == cap_code)
res = sess.execute(sel).fetchone()
cap_id = res[0]
cap_ids[cap_code] = cap_id
ctx.status_ok()
ctx.status("caching partition, distance type and distance internal IDs")
for p in ctx.deployment_config.providers.values():
# Populate our hashmap of partition name to internal ID
part_uuid = p.partition.uuid
if part_uuid not in part_ids:
# Grab the partition internal ID matching the partition UUID
sel = sa.select([part_tbl.c.id]).where(
part_tbl.c.uuid == part_uuid)
res = sess.execute(sel).fetchone()
part_ids[part_uuid] = res[0]
# Populate our hashmap of distance type and codes to internal IDs
for pd in p.distances:
d_key = (pd.distance_type, pd.distance_code)
if d_key not in distance_ids:
if pd.distance_type not in distance_type_ids:
# Grab the distance type internal ID matching the distance
# type code
sel = sa.select([dt_tbl.c.id]).where(
dt_tbl.c.code == pd.distance_type)
res = sess.execute(sel).fetchone()
distance_type_ids[pd.distance_type] = res[0]
dt_id = distance_type_ids[pd.distance_type]
# Not yet in cache... look up the provider group by name
sel = sa.select([d_tbl.c.id]).where(
sa.and_(d_tbl.c.type_id == dt_id,
d_tbl.c.code == pd.distance_code))
res = sess.execute(sel).fetchone()
distance_ids[d_key] = res[0]
ctx.status_ok()
object_type_id = get_object_type_map()['runm.provider']
compute_prov_type_id = get_provider_type_map()['runm.compute']
ctx.status("creating providers")
try:
for p in ctx.deployment_config.providers.values():
# Create the object lookup record
obj_rec = dict(
object_type=object_type_id,
uuid=p.uuid,
name=p.name,
)
ins = obj_tbl.insert().values(**obj_rec)
sess.execute(ins)
# Create the base provider record
part_id = part_ids[p.partition.uuid]
p_rec = dict(
uuid=p.uuid,
type_id=compute_prov_type_id,
partition_id=part_id,
generation=1,
)
ins = p_tbl.insert().values(**p_rec)
res = sess.execute(ins)
p_id = res.inserted_primary_key[0]
# Now that we've added the base records, go ahead and flesh out
# the provider group members and provider tree records, both of
# which require some lookups into the provider_groups and
# providers tables to get internal IDs.
tree_rec = dict(
root_provider_id=p_id,
nested_left=1,
nested_right=2,
generation=1,
)
ins = tree_tbl.insert().values(**tree_rec)
sess.execute(ins)
# Add the provider's group memberships
for pg in p.groups:
pg_id = pg_ids[pg.uuid]
pg_member_rec = dict(
provider_group_id=pg_id,
provider_id=p_id,
)
ins = pg_members_tbl.insert().values(**pg_member_rec)
sess.execute(ins)
# OK, now add the inventory records for the provider
for rc_code, inv in p.profile.inventory.items():
rc_id = rc_ids[rc_code]
inv_rec = dict(
provider_id=p_id,
resource_class_id=rc_id,
total=inv['total'],
reserved=inv['reserved'],
min_unit=inv['min_unit'],
max_unit=inv['max_unit'],
step_size=inv['step_size'],
allocation_ratio=inv['allocation_ratio'],
)
ins = inv_tbl.insert().values(**inv_rec)
sess.execute(ins)
# Add the provider's capabilities
for cap_code in p.profile.capabilities:
cap_id = cap_ids[cap_code]
p_cap_rec = dict(
provider_id=p_id,
capability_id=cap_id,
)
ins = p_caps_tbl.insert().values(**p_cap_rec)
sess.execute(ins)
# Add the distance relationships after all the provider groups have
# been added
for pd in p.distances:
pg_id = pg_ids[pd.provider_group.uuid]
d_key = (pd.distance_type, pd.distance_code)
d_id = distance_ids[d_key]
pd_rec = dict(
provider_id=p_id,
provider_group_id=pg_id,
distance_id=d_id,
)
ins = pd_tbl.insert().values(**pd_rec)
sess.execute(ins)
sess.commit()
ctx.status_ok()
except Exception as err:
sess.rollback()
ctx.status_fail(err)
def create_distances(ctx):
ctx.status("creating distance types")
dt_tbl = resource_models.get_table('distance_types')
d_tbl = resource_models.get_table('distances')
recs = [
dict(
code="network",
description="Relative network distances",
generation=1,
),
dict(
code="storage",
description="Relative storage distances",
generation=1,
),
dict(
code="failure",
description="Relative distance representing successively smaller "
"chance of failure affecting workloads running on "
"that provider",
generation=1,
),
]
try:
_insert_records(dt_tbl, recs)
ctx.status_ok()
except Exception as err:
ctx.status_fail(err)
ctx.status("creating distances")
sess = resource_models.get_session()
sel = sa.select([dt_tbl.c.id]).where(dt_tbl.c.code == "network")
net_dt_id = sess.execute(sel).fetchone()[0]
sel = sa.select([dt_tbl.c.id]).where(dt_tbl.c.code == "storage")
storage_dt_id = sess.execute(sel).fetchone()[0]
sel = sa.select([dt_tbl.c.id]).where(dt_tbl.c.code == "failure")
failure_dt_id = sess.execute(sel).fetchone()[0]
recs = [
dict(
type_id=net_dt_id,
code="local",
position=0,
description="Very little network latency - within rack L2 subnet",
),
dict(
type_id=net_dt_id,
code="site",
position=1,
description="Slightly higher latency between leaf "
"switch-connected nodes in a DC",
),
dict(
type_id=net_dt_id,
code="remote",
position=2,
description="WAN latency",
),
dict(
type_id=storage_dt_id,
code="local",
position=0,
description="Block storage local to host running machine",
),
dict(
type_id=storage_dt_id,
code="row",
position=1,
description="NAS server shared by row of compute",
),
dict(
type_id=storage_dt_id,
code="remote",
position=2,
description="External cloud block storage with WAN latency",
),
dict(
type_id=failure_dt_id,
code="local",
position=0,
description="Providers are within same rack failure domain",
),
dict(
type_id=failure_dt_id,
code="rack",
position=1,
description="Providers are in different rack power/failure domain",
),
dict(
type_id=failure_dt_id,
code="row",
position=2,
description="Providers are in different row power/failure domain",
),
dict(
type_id=failure_dt_id,
code="site",
position=3,
description="Providers are in different sites",
),
]
try:
_insert_records(d_tbl, recs)
ctx.status_ok()
except Exception as err:
ctx.status_fail(err)
def _insert_records(tbl, recs):
sess = resource_models.get_session()
for rec in recs:
ins = tbl.insert().values(**rec)
sess.execute(ins)
sess.commit()