def set_node_state (database_nodeobject, end_state):
"""
<Purpose>
given a list of vessels, change the userkeys of all the vessels.
Only one of the vessel should carry the end_state, all other vessels
will have empty state as transitional state. Keep in mind that the
userkey_list contains the transitional state of the node.
<Arguments>
end_state - the state that the node should end in.
database_nodeobject - an object that has been retrieved from the database
<Exceptions>
NodeError - raised if unable to change node state
NodemanagerCommunicationError - incase we are unable to retrieve node_info
<Side Effects>
None
<Return>
None
"""
# Convert the end_state pubkey to string format and then set the key.
final_state_str = _do_rsa_publickey_to_string(end_state)
# Try to change the node state by setting the new state in the
# userkeys list of the extra vessel
try:
backend.set_vessel_user_keylist(database_nodeobject, database_nodeobject.extra_vessel_name, [final_state_str])
except:
raise NodeError("Unable to change state of node: " + database_nodeobject.node_identifier +
" "+traceback.format_exc())
log("Successfully changed the node state to "+str(end_state))
def split_vessels (node_string, node_info, database_nodeobject, resourcetemplate):
"""
<Purpose>
The purpose of this function is to take a node has an extra vessel that is
big enough to be split into two or more vessels. The resources on a vessel
is determined by the resourcetemplate that is provided as well as the usable
ports on the node.
<Arguments>
node_string - the name of the node. ip:port or NAT:port
node_info - a dictionary containing information about the node
database_nodeobject - a database object for the node
resourcetemplate - the file that has information about resources
<Exceptions>
NodeError - Error raised if node is not in the right state
NodemanagerCommunicationError - raised if we cannot retrieve the usable ports for a node
NodeProcessError - raised if unable to split vessels properly
DatabaseError - raised if unable to modify the database
<Side Effects>
Database gets modified.
<Return>
None
"""
log("Beginning to divide vessel on node: "+node_string)
# Extract the ip/NAT and the port.
# Note that the first portion of the node might be an ip or a NAT string.
(ip_or_nat_string, port_num) = split_node_string(node_string)
donated_vesselname = database_nodeobject.extra_vessel_name
# Retrieve the usable ports list for the node and then shuffle
# the ports so each vessel gets a random subset of the ports
usable_ports_list = nodemanager.get_vessel_resources(ip_or_nat_string, port_num, donated_vesselname)['usableports']
log("List of usable ports in node: "+node_string+". "+str(usable_ports_list))
random.shuffle(usable_ports_list)
#the vessel that we start with
current_vessel = donated_vesselname
log("Name of starting vessel: "+current_vessel)
# Keep splittiing the vessel until we run out of resources.
# Note that when split_vessel is called the left vessel
# has the leftover (extra vessel)and the right vessel has
# the vessel with the exact resources.
while len(usable_ports_list) >= 10:
desired_resourcedata = get_resource_data(resourcetemplate, usable_ports_list)
#use the first 10 ports so remove them from the list of usable_ports_list
used_ports_list = usable_ports_list[:10]
usable_ports_list = usable_ports_list[10:]
log("Ports we are going to use for the new vessel: "+str(used_ports_list))
log("Starting to split vessel: "+current_vessel)
# Split the current vessel. The exact vessel is the right vessel
# and the extra vessel is the left vessel.
try:
leftover_vessel, new_vessel = backend.split_vessel(database_nodeobject, current_vessel, desired_resourcedata)
except NodemanagerCommunicationError, e:
# The object 'e' will already include traceback info that has the actual node error.
# If the failure is due to inability to split further, that's ok.
if 'Insufficient quantity:' in str(e):
log("Could not split " + current_vessel + " any further due to insufficient resource/quantity. " + str(e))
# We must break out of the while loop here. If we let the exception get,
# raised, it will look like the transition failed.
break
raise
log("Successfully split vessel: "+current_vessel+" into vessels: "+leftover_vessel+" and "+new_vessel)
current_vessel = leftover_vessel
# Make sure to update the database and record the new
# name of the extra vessel as when backend.split_vessels()
# is called, the old vessel does not exist anymore.
# Instead two new vessels are created, where the first
# vessel is the extra vessel with leftover resources
# and the second vessel has the actual amount of resources
maindb.set_node_extra_vessel_name(database_nodeobject, current_vessel)
# Set the user_list for the new vesel to be empty. Remember that user_list is what determines
# the transition state, and only the extra vessel should have this set.
backend.set_vessel_user_keylist(database_nodeobject, new_vessel, [])
log("Changed the userkeys for the vessel "+new_vessel+" to []")
# Add the newly created vessel to the database and then add the ports associated with
# the vessel to the database also.
log("Creating a vessel record in the database for vessel "+new_vessel+" for node "+node_string)
try:
vessel_object = maindb.create_vessel(database_nodeobject, new_vessel)
log("Setting the vessel ports in the database for vessel "+new_vessel+" with port list: "+str(used_ports_list))
maindb.set_vessel_ports(vessel_object, used_ports_list)
except:
raise DatabaseError("Failed to create vessel entry or change vessel entry for vessel: " +
new_vessel + ". " + traceback.format_exc())
def onepercentmanyevents_divide(node_string, node_info, database_nodeobject,
onepercent_resourcetemplate):
"""
<Purpose>
The purpose of this function is to take a node thats in canonical state
with one vessel, and split it into the 1% vessels so the vessels can
be acquired by users.
<Arguments>
node_string - the name of the node. ip:port or NAT:port
node_info - a dictionary containing information about the node
database_nodeobject - a database object for the node
onepercent_resourcetemplate - the file that has information about resources
<Exceptions>
NodeError - Error raised if node is not in the right state
NodemanagerCommunicationError - raised if we cannot retrieve the usable ports for a node
NodeProcessError - raised if unable to split vessels properly
DatabaseError - raised if unable to modify the database
<Side Effects>
Database gets modified.
<Return>
None
"""
node_transition_lib.log("Beginning onepercentmanyevents_divide on node: " +
node_string)
# Extract the ip/NAT and the port.
# Note that the first portion of the node might be an ip or a NAT string.
(ip_or_nat_string,
port_num) = node_transition_lib.split_node_string(node_string)
donated_vesselname = database_nodeobject.extra_vessel_name
# Retrieve the usable ports list for the node and then shuffle
# the ports so each vessel gets a random subset of the ports
usable_ports_list = nodemanager.get_vessel_resources(
ip_or_nat_string, port_num, donated_vesselname)['usableports']
node_transition_lib.log("List of usable ports in node: " + node_string +
". " + str(usable_ports_list))
random.shuffle(usable_ports_list)
#the vessel that we start with
current_vessel = donated_vesselname
node_transition_lib.log("Name of starting vessel: " + current_vessel)
# Keep splittiing the vessel until we run out of resources.
# Note that when split_vessel is called the left vessel
# has the leftover (extra vessel)and the right vessel has
# the vessel with the exact resources.
while len(usable_ports_list) >= 10:
desired_resourcedata = get_resource_data(onepercent_resourcetemplate,
usable_ports_list)
#use the first 10 ports so remove them from the list of usable_ports_list
used_ports_list = usable_ports_list[:10]
usable_ports_list = usable_ports_list[10:]
node_transition_lib.log(
"Ports we are going to use for the new vessel: " +
str(used_ports_list))
node_transition_lib.log("Starting to split vessel: " + current_vessel)
# Split the current vessel. The exact vessel is the right vessel
# and the extra vessel is the left vessel.
try:
leftover_vessel, new_vessel = backend.split_vessel(
database_nodeobject, current_vessel, desired_resourcedata)
except NodemanagerCommunicationError, e:
# The object 'e' will already include traceback info that has the actual node error.
# If the failure is due to inability to split further, that's ok.
if 'Insufficient quantity:' in str(e):
node_transition_lib.log(
"Could not split " + current_vessel +
" any further due to insufficient resource/quantity. " +
str(e))
# We must break out of the while loop here. If we let the exception get,
# raised, it will look like the transition failed.
break
raise
node_transition_lib.log("Successfully split vessel: " +
current_vessel + " into vessels: " +
leftover_vessel + " and " + new_vessel)
current_vessel = leftover_vessel
# Make sure to update the database and record the new
# name of the extra vessel as when backend.split_vessels()
# is called, the old vessel does not exist anymore.
# Instead two new vessels are created, where the first
# vessel is the extra vessel with leftover resources
# and the second vessel has the actual amount of resources
maindb.set_node_extra_vessel_name(database_nodeobject, current_vessel)
#set the user_list for the new vesel to be empty. Remember that user_list is what determines
#the transition state, and only the extra vessel should have this set.
backend.set_vessel_user_keylist(database_nodeobject, new_vessel, [])
node_transition_lib.log("Changed the userkeys for the vessel " +
new_vessel + " to []")
# Add the newly created vessel to the database and then add the ports associated with
# the vessel to the database also.
try:
node_transition_lib.log(
"Creating a vessel record in the database for vessel " +
new_vessel + " for node " + node_string)
vessel_object = maindb.create_vessel(database_nodeobject,
new_vessel)
node_transition_lib.log(
"Setting the vessel ports in the database for vessel " +
new_vessel + " with port list: " + str(used_ports_list))
maindb.set_vessel_ports(vessel_object, used_ports_list)
except:
raise node_transition_lib.DatabaseError(
"Failed to create vessel entry or change vessel entry for vessel: "
+ new_vessel + ". " + traceback.format_exc())
