def erase_card(id, DB: MySQL, EEM: EEM):
DB.start_transaction()
if get_card(id, DB, EEM)["status"] == "eeio":
DB.start_transaction()
status, message = DB.delete_query_simple(__table_hardware, "id", id)
else:
status, message = DB.delete_query_simple(__table_net, "id", id)
# First status code checks:
# 1: Syntaxis
# 2: Completeness
if status:
status, result = DB.commit_transaction()
# Second status checks:
# 1: Data integrity
if status:
return messenger.message200("OK")
# Implicit rollback
else:
return messenger.message404(message)
else:
status, error = DB.rollback(messsage)
return messenger.message404(error)
def modify_hardware_tag(card, DB: MySQL, EEM: EEM):
DB.start_transaction()
status, message = modify_card(card, __table_hardware, hardware_card_keys,
DB, EEM)
status, message = modify_capacities(card, __table_hardware_capacity,
hardware_capacity_keys, DB, EEM)
# First status code checks:
# 1: Syntaxis
# 2: Completeness
if status:
status, message = DB.commit_transaction()
# Second status checks:
# 1: Data integrity
if status:
return messenger.message200("OK")
# Implicit rollback
else:
return messenger.message404(message)
else:
status, error = DB.rollback(message)
return messenger.message404(error)
def erase_workload(id, DB: MySQL):
DB.start_transaction()
# A single delete is enough as child tables delete on cascade
status, message = DB.delete_query_simple(__table_workloads, "id", id)
# First status code checks:
# 1: Syntaxis
# 2: Completeness
if status:
status, message = DB.commit_transaction()
# Second status checks:
# 1: Data integrity
if status:
return messenger.message200("OK")
# Implicit rollback
else:
return messenger.message404(message)
else:
status, error = DB.rollback(messsage)
return messenger.message404(error)
def create_workload(workload, DB: MySQL):
DB.start_transaction()
mapping = deepcopy(workload_keys)
mapping_requirement = deepcopy(hardware_requirements_keys)
mapping_requirement_insert = deepcopy(hardware_requirements_keys)
mapping_capacity = deepcopy(capacity_requirements_keys)
mapping.remove("id") # As it is assigned by the API
mapping_requirement.remove("workload_id") # Not present in the petition
mapping_requirement.remove("requirement_id") # Not present in the petition
mapping_requirement_insert.remove(
"requirement_id") # Not present in the petition
mapping_capacity.remove("workload_id") # Not present in the petition
mapping_capacity.remove("requirement_id") # Not present in the petition
if len(workload.keys()) - 1 != len(mapping):
message = "Inserted workload data is incorrect"
return messenger.message404(message)
# Get the assigned ID of the workload
statement = ("SELECT MAX(id) FROM workloads")
workload_id = DB.select_query(statement)
while (isinstance(workload_id, Iterable)):
workload_id = next(iter(workload_id))
if not workload_id or workload_id < 0:
workload_id = 1
else:
workload_id += 1
values = [workload_id]
for x in range(0, len(mapping)):
if mapping[x] in workload:
values.append(workload[mapping[x]])
else:
message = "%s not introduced in the request" % (mapping[x])
return messenger.message404(message)
status1, message1 = DB.insert_query(__table_workloads, workload_keys,
values)
# Time to create the requirements of the workload, one entry each
requirements = workload["requirements"]
req_number = 0
for requirement in requirements:
req_number += 1
statement = ("SELECT MAX(requirement_id) FROM hardware_requirements")
req_id = DB.select_query(statement)
while (isinstance(req_id, Iterable)):
req_id = next(iter(req_id))
if not req_id:
req_id = req_number
else:
req_id += req_number
values = [req_id, workload_id]
for x in range(0, len(mapping_requirement)):
if mapping_requirement[x] in requirement:
values.append(requirement[mapping_requirement[x]])
else:
message = "%s not introduced in the request" % (
mapping_requirement[x])
return messenger.message404(message)
status2, message2 = DB.insert_query(__table_hardware_requirements,
hardware_requirements_keys, values)
capacity_req = requirement["hardware_capacity_requirements"]
for capacity in capacity_req:
values = [workload_id, req_id]
for x in range(0, len(mapping_capacity)):
if mapping_capacity[x] in capacity:
values.append(capacity[mapping_capacity[x]])
else:
message = "%s not introduced in the request" % (
mapping_capacity[x])
return messenger.message404(message)
status3, message3 = DB.insert_query(__table_capacity_requirements,
capacity_requirements_keys,
values)
if not status1:
status = False
message = message1
elif not status2:
status = False
message = message2
elif not status3:
status = False
message = message3
else:
status = True
message = "OK"
# First status code checks:
# 1: Syntaxis
# 2: Completeness
if status:
status, message = DB.commit_transaction()
# Second status checks:
# 1: Data integrity
if status:
return messenger.messageWorkload(workload_id)
# Implicit rollback
else:
return messenger.message404(message)
else:
status, error = DB.rollback(message)
return messenger.message404(error)
def erase_assignment(workload, DB: MySQL, EEM: EEM):
DB.start_transaction()
workload_id = next(iter(workload.values()))
# Retrieve server EEM net card and GID
workload_server_net_card, gid = get_server_card(workload_id, DB)
if not workload_server_net_card:
return finish_assignment(
False,
"Workload does not exist or is not assigned to any server",
DB)
downs_port = get_card(workload_server_net_card, DB, EEM)["downstream_port"]
if downs_port == "All down":
message = (
"Cannot erase assignment as the network card %s "
"does not have any hardware card attached"
% workload_server_net_card)
return finish_assignment(
False,
message,
DB)
downs_port = downs_port["downstream_port_id"]
assigned_cards = get_assignment_hardware(workload_id, DB)
if not assigned_cards:
message = (
"Cannot erase assignment as the workload does not "
"have any hardware card assigned"
)
return finish_assignment(
False,
message,
DB)
erase_message = ""
for assigned_hardware in assigned_cards:
assigned_hardware = next(iter(assigned_hardware))
values = [assigned_hardware, workload_server_net_card, workload_id]
if is_feasible_to_unasign_hardware(
assigned_hardware,
workload_server_net_card,
DB):
EEM.disconect_hardware_from_server(assigned_hardware)
erase_message += "VLAN erased between %s and %s" % (
assigned_hardware,
workload_server_net_card)
else:
erase_message += (
"VLAN between %s and %s could't be erased as "
"there are other assignments in progress, "
"DB assignment erased"
) % (assigned_hardware, workload_server_net_card)
# Always eliminate assignment in DB even if the VLAN can't be erased
status1, message1 = DB.delete_query(
__table,
assignment_keys,
values)
status2, message2 = DB.delete_query_simple(
__table_assigned_capacities,
"workload",
workload_id)
if not status1:
status = False
message = message1
elif not status2:
status = False
message = message2
else:
status = True
if not status:
return finish_assignment(
False,
message,
DB)
return finish_assignment(
True,
erase_message,
DB)
def create_assignment(workload, DB: MySQL, EEM: EEM):
DB.start_transaction()
workload_id = next(iter(workload.values()))
statement = ("SELECT * FROM hardware_requirements ")
statement += ("WHERE workload_id = %s") % workload_id
workload_requirements_hardware = DB.select_query(statement)
if not workload_requirements_hardware:
message = "Workload does not exist or "
message += "does not have any hardware requirements"
return finish_assignment(False, message, DB)
# Retrieve server EEM net card and GID
workload_server_net_card, gid = get_server_card(workload_id, DB)
if not workload_server_net_card:
return finish_assignment(
False,
"The workload server does not have any EEM net card attached",
DB)
boxes = set()
for requirement in workload_requirements_hardware:
available_hardware = get_available_hardware(
requirement,
workload_server_net_card,
DB, EEM)
if not available_hardware:
return finish_assignment(
False,
"There is not any availble hardware of the type: %s" % (
requirement[2]),
DB)
hardware_choice = select_hardware(available_hardware)
status, message = assign_capacities(
hardware_choice,
workload_server_net_card,
workload_id,
requirement[0],
DB)
if not status:
return finish_assignment(
False,
message,
DB)
boxes.add(hardware_choice)
vlan_message = ""
for box in boxes:
values = [box, workload_server_net_card, workload_id]
status, message = DB.insert_query(
__table,
assignment_keys,
values)
if not status:
return finish_assignment(
False,
message,
DB)
EEM.assign_hardware_to_server(box, gid)
vlan_message += "New VLAN created between %s and %s " % (
box,
workload_server_net_card)
return finish_assignment(
True,
vlan_message,
DB)