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Support writing ACLs

This commit is contained in:
Joshua Boniface 2018-10-17 00:23:27 -04:00
parent d9d57c015f
commit c726865b89
2 changed files with 340 additions and 24 deletions
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111
client-cli/pvc.py
View File

@ -531,8 +531,8 @@ def cli_network():
@click.command(name='add', short_help='Add a new virtual network to the cluster.')
@click.option(
'-d', '--description', 'description',
default="",
help='Description of the network; should not contain whitespace.'
required=True,
help='Description of the network; must be unique and not contain whitespace and must be unique.'
)
@click.option(
'-n', '--domain', 'domain',
@ -552,7 +552,8 @@ def cli_network():
@click.option(
'--dhcp/--no-dhcp', 'dhcp_flag',
is_flag=True,
default=False,
required=True,
default=None,
help='Enable/disable DHCP for clients on subnet.'
)
@click.option(
@ -587,7 +588,7 @@ def net_add(vni, description, domain, ip_network, ip_gateway, dhcp_flag, dhcp_st
@click.option(
'-d', '--description', 'description',
default=None,
help='Description of the network; should not contain whitespace.'
help='Description of the network; must be unique and not contain whitespace.'
)
@click.option(
'-n', '--domain', 'domain',
@ -606,8 +607,8 @@ def net_add(vni, description, domain, ip_network, ip_gateway, dhcp_flag, dhcp_st
)
@click.option(
'--dhcp/--no-dhcp', 'dhcp_flag',
default=None,
is_flag=True,
default=None,
help='Enable/disable DHCP for clients on subnet.'
)
@click.option(
@ -803,7 +804,103 @@ def net_acl():
"""
pass
###############################################################################
# pvc network acl add
###############################################################################
@click.command(name='add', short_help='Add firewall ACL.')
@click.option(
'--in/--out', 'direction',
is_flag=True,
required=True,
default=None,
help='Inbound or outbound ruleset.'
)
@click.option(
'-d', '--description', 'description',
required=True,
help='Description of the ACL; must be unique and not contain whitespace.'
)
@click.option(
'-r', '--rule', 'rule',
required=True,
help='NFT firewall rule.'
)
@click.option(
'-o', '--order', 'order',
default=None,
help='Order of rule in the chain (see "list"); defaults to last.'
)
@click.argument(
'net'
)
def net_acl_add(net, direction, description, rule, order):
"""
Add a new NFT firewall rule to network NET; the rule is a literal NFT rule belonging to the forward table for the client network; NET can be either a VNI or description.
NOTE: All client networks are default-allow in both directions; deny rules MUST be added here at the end of the sequence for a default-deny setup.
NOTE: Ordering places the rule at the specified ID, not before it; the old rule of that ID and all subsequent rules will be moved down.
Example:
pvc network acl add 1001 --in --rule "tcp dport 22 ct state new accept" --description "ssh-in" --order 3
"""
zk_conn = pvc_common.startZKConnection(zk_host)
retcode, retmsg = pvc_network.add_acl(zk_conn, net, direction, description, rule, order)
cleanup(retcode, retmsg, zk_conn)
###############################################################################
# pvc network acl remove
###############################################################################
@click.command(name='remove', short_help='Remove firewall ACL.')
@click.option(
'--in/--out', 'direction',
is_flag=True,
required=True,
default=None,
help='Inbound or outbound rule set.'
)
@click.argument(
'net'
)
@click.argument(
'rule',
)
def net_acl_remove(net, rule, direction):
"""
Remove an NFT firewall rule RULE from network NET; RULE can be either a sequence order identifier or description; NET can be either a VNI or description."
"""
zk_conn = pvc_common.startZKConnection(zk_host)
retcode, retmsg = pvc_network.remove_acl(zk_conn, net, rule, direction)
cleanup(retcode, retmsg, zk_conn)
###############################################################################
# pvc network acl list
###############################################################################
@click.command(name='list', short_help='List firewall ACLs.')
@click.option(
'--in/--out', 'direction',
is_flag=True,
required=True,
default=None,
help='Inbound or outbound rule set.'
)
@click.argument(
'net'
)
@click.argument(
'limit', default=None, required=False
)
def net_acl_list(net, limit, direction):
"""
List all NFT firewall rules in network NET; optionally only match elements matching description regex LIMIT; NET can be either a VNI or description.
"""
zk_conn = pvc_common.startZKConnection(zk_host)
retcode, retmsg = pvc_network.get_list_acl(zk_conn, net, limit, direction)
cleanup(retcode, retmsg, zk_conn)
@ -909,6 +1006,10 @@ net_dhcp_static.add_command(net_dhcp_static_add)
net_dhcp_static.add_command(net_dhcp_static_remove)
net_dhcp_static.add_command(net_dhcp_static_list)
net_acl.add_command(net_acl_add)
net_acl.add_command(net_acl_remove)
net_acl.add_command(net_acl_list)
cli.add_command(cli_node)
cli.add_command(cli_vm)
cli.add_command(cli_network)

253
client-common/network.py
View File

@ -102,17 +102,27 @@ def getNetworkDescription(zk_conn, network):
def getNetworkDHCPLeases(zk_conn, vni):
# Get a list of DHCP leases by listing the children of /networks/<vni>/dhcp_leases
dhcp_leases = zk_conn.get_children('/networks/{}/dhcp_leases'.format(vni))
dhcp_leases = zkhandler.listchildren(zk_conn, '/networks/{}/dhcp_leases'.format(vni))
return sorted(dhcp_leases)
def getNetworkDHCPReservations(zk_conn, vni):
# Get a list of DHCP reservations by listing the children of /networks/<vni>/dhcp_reservations
dhcp_reservations = zk_conn.get_children('/networks/{}/dhcp_reservations'.format(vni))
dhcp_reservations = zkhandler.listchildren(zk_conn, '/networks/{}/dhcp_reservations'.format(vni))
return sorted(dhcp_reservations)
def getNetworkFirewallRules(zk_conn, vni):
firewall_rules = zk_conn.get_children('/networks/{}/firewall_rules'.format(vni))
return None
def getNetworkACLs(zk_conn, vni, direction):
# Get the (sorted) list of active ACLs
unordered_acl_list = zkhandler.listchildren(zk_conn, '/networks/{}/firewall_rules/{}'.format(vni, direction))
ordered_acls = {}
full_acl_list = []
for acl in unordered_acl_list:
order = zkhandler.readdata(zk_conn, '/networks/{}/firewall_rules/{}/{}/order'.format(vni, direction, acl))
ordered_acls[order] = acl
for order in sorted(ordered_acls.keys()):
full_acl_list.append(ordered_acls[order])
return full_acl_list
def getNetworkInformation(zk_conn, vni):
description = zkhandler.readdata(zk_conn, '/networks/{}'.format(vni))
@ -139,6 +149,12 @@ def getDHCPReservationInformation(zk_conn, vni, mac_address):
timestamp = 'static'
return hostname, ip_address, mac_address, timestamp
def getACLInformation(zk_conn, vni, direction, description):
order = zkhandler.readdata(zk_conn, '/networks/{}/firewall_rules/{}/{}/order'.format(vni, direction, description))
rule = zkhandler.readdata(zk_conn, '/networks/{}/firewall_rules/{}/{}/rule'.format(vni, direction, description))
return order, description, rule
def formatNetworkInformation(zk_conn, vni, long_output):
description, domain, ip_network, ip_gateway, dhcp_flag, dhcp_start, dhcp_end = getNetworkInformation(zk_conn, vni)
@ -318,7 +334,6 @@ def formatDHCPLeaseList(zk_conn, vni, dhcp_leases_list, reservations=False):
else:
hostname[dhcp_lease], ip_address[dhcp_lease], mac_address[dhcp_lease], timestamp[dhcp_lease] = getDHCPLeaseInformation(zk_conn, vni, dhcp_lease)
# Determine optimal column widths
lease_hostname_length = 13
lease_ip_address_length = 11
@ -328,11 +343,11 @@ def formatDHCPLeaseList(zk_conn, vni, dhcp_leases_list, reservations=False):
_lease_hostname_length = len(hostname[dhcp_lease]) + 1
if _lease_hostname_length > lease_hostname_length:
lease_hostname_length = _lease_hostname_length
# ip_network column
# ip_address column
_lease_ip_address_length = len(ip_address[dhcp_lease]) + 1
if _lease_ip_address_length > lease_ip_address_length:
lease_ip_address_length = _lease_ip_address_length
# ip_gateway column
# mac_address column
_lease_mac_address_length = len(mac_address[dhcp_lease]) + 1
if _lease_mac_address_length > lease_mac_address_length:
lease_mac_address_length = _lease_mac_address_length
@ -379,6 +394,70 @@ def formatDHCPLeaseList(zk_conn, vni, dhcp_leases_list, reservations=False):
output_string = dhcp_lease_list_output_header + '\n' + '\n'.join(sorted(dhcp_lease_list_output))
return output_string
def formatACLList(zk_conn, vni, direction, acl_list):
acl_list_output = []
order = {}
description = {}
rule = {}
# Gather information for printing
for acl in acl_list:
order[acl], description[acl], rule[acl] = getACLInformation(zk_conn, vni, direction, acl)
# Determine optimal column widths
acl_order_length = 6
acl_description_length = 12
acl_rule_length = 5
for acl in acl_list:
# order column
_acl_order_length = len(order[acl]) + 1
if _acl_order_length > acl_order_length:
acl_order_length = _acl_order_length
# description column
_acl_description_length = len(description[acl]) + 1
if _acl_description_length > acl_description_length:
acl_description_length = _acl_description_length
# rule column
_acl_rule_length = len(rule[acl]) + 1
if _acl_rule_length > acl_rule_length:
acl_rule_length = _acl_rule_length
# Format the string (header)
acl_list_output_header = '{bold}\
{acl_order: <{acl_order_length}} \
{acl_description: <{acl_description_length}} \
{acl_rule: <{acl_rule_length}} \
{end_bold}'.format(
bold=ansiiprint.bold(),
end_bold=ansiiprint.end(),
acl_order_length=acl_order_length,
acl_description_length=acl_description_length,
acl_rule_length=acl_rule_length,
acl_order='Order',
acl_description='Description',
acl_rule='Rule',
)
for acl in acl_list:
acl_list_output.append('{bold}\
{acl_order: <{acl_order_length}} \
{acl_description: <{acl_description_length}} \
{acl_rule: <{acl_rule_length}} \
{end_bold}'.format(
bold='',
end_bold='',
acl_order_length=acl_order_length,
acl_description_length=acl_description_length,
acl_rule_length=acl_rule_length,
acl_order=order[acl],
acl_description=description[acl],
acl_rule=rule[acl],
)
)
output_string = acl_list_output_header + '\n' + '\n'.join(sorted(acl_list_output))
return output_string
def isValidMAC(macaddr):
allowed = re.compile(r"""
(
@ -409,15 +488,16 @@ def isValidIP(ipaddr):
# Direct functions
#
def add_network(zk_conn, vni, description, domain, ip_network, ip_gateway, dhcp_flag, dhcp_start, dhcp_end):
if description == '':
description = vni
if dhcp_flag and ( not dhcp_start or not dhcp_end ):
return False, 'ERROR: DHCP start and end addresses are required for a DHCP-enabled network.'
# Check if a network with this VNI already exists
# Check if a network with this VNI or description already exists
if zk_conn.exists('/networks/{}'.format(vni)):
return False, 'ERROR: A network with VNI {} already exists!'.format(vni)
for network in zkhandler.listchildren(zk_conn, '/networks'):
network_description = zkhandler.readdata(zk_conn, '/networks/{}'.format(network))
if network_description == description:
return False, 'ERROR: A network with description {} already exists!'.format(description)
# Add the new network to Zookeeper
zkhandler.writedata(zk_conn, {
@ -425,12 +505,14 @@ def add_network(zk_conn, vni, description, domain, ip_network, ip_gateway, dhcp_
'/networks/{}/domain'.format(vni): domain,
'/networks/{}/ip_network'.format(vni): ip_network,
'/networks/{}/ip_gateway'.format(vni): ip_gateway,
'/networks/{}/dhcp_flag'.format(vni): str(dhcp_flag),
'/networks/{}/dhcp_flag'.format(vni): dhcp_flag,
'/networks/{}/dhcp_start'.format(vni): dhcp_start,
'/networks/{}/dhcp_end'.format(vni): dhcp_end,
'/networks/{}/dhcp_leases'.format(vni): '',
'/networks/{}/dhcp_reservations'.format(vni): '',
'/networks/{}/firewall_rules'.format(vni): ''
'/networks/{}/firewall_rules'.format(vni): '',
'/networks/{}/firewall_rules/in'.format(vni): '',
'/networks/{}/firewall_rules/out'.format(vni): ''
})
return True, 'Network "{}" added successfully!'.format(description)
@ -448,7 +530,7 @@ def modify_network(zk_conn, vni, **parameters):
if parameters['ip_gateway'] != None:
zk_data.update({'/networks/{}/ip_gateway'.format(vni): parameters['ip_gateway']})
if parameters['dhcp_flag'] != None:
zk_data.update({'/networks/{}/dhcp_flag'.format(vni): str(parameters['dhcp_flag'])})
zk_data.update({'/networks/{}/dhcp_flag'.format(vni): parameters['dhcp_flag']})
if parameters['dhcp_start'] != None:
zk_data.update({'/networks/{}/dhcp_start'.format(vni): parameters['dhcp_start']})
if parameters['dhcp_end'] != None:
@ -513,7 +595,7 @@ def remove_dhcp_reservation(zk_conn, network, reservation):
match_description = ''
# Check if the reservation matches a description, a mac, or an IP address currently in the database
dhcp_reservations_list = zk_conn.get_children('/networks/{}/dhcp_reservations'.format(net_vni))
dhcp_reservations_list = getNetworkDHCPReservations(zk_conn, net_vni)
for macaddr in dhcp_reservations_list:
hostname = zkhandler.readdata(zk_conn, '/networks/{}/dhcp_reservations/{}/hostname'.format(net_vni, macaddr))
ipaddress = zkhandler.readdata(zk_conn, '/networks/{}/dhcp_reservations/{}/ipaddr'.format(net_vni, macaddr))
@ -531,6 +613,105 @@ def remove_dhcp_reservation(zk_conn, network, reservation):
return True, 'DHCP reservation "{}" removed successfully!'.format(match_description)
def add_acl(zk_conn, network, direction, description, rule, order):
# Validate and obtain standard passed value
net_vni = getNetworkVNI(zk_conn, network)
if net_vni == None:
return False, 'ERROR: Could not find network "{}" in the cluster!'.format(network)
# Change direction to something more usable
if direction:
direction = "in"
else:
direction = "out"
if zk_conn.exists('/networks/{}/firewall_rules/{}/{}'.format(net_vni, direction, description)):
return False, 'ERROR: A rule with description "{}" already exists!'.format(description)
# Handle reordering
full_acl_list = getNetworkACLs(zk_conn, net_vni, direction)
acl_list_length = len(full_acl_list)
# Set order to len
if order == None or int(order) > acl_list_length:
order = acl_list_length
# Convert passed-in order to an integer
else:
order = int(order)
# Insert into the array at order-1
full_acl_list.insert(order, description)
# Update the existing ordering
updated_orders = {}
for idx, acl in enumerate(full_acl_list):
# We haven't added ourselves yet
if acl == description:
continue
updated_orders[
'/networks/{}/firewall_rules/{}/{}/order'.format(net_vni, direction, acl)
] = idx
if updated_orders:
zkhandler.writedata(zk_conn, updated_orders)
# Add the new rule
try:
zkhandler.writedata(zk_conn, {
'/networks/{}/firewall_rules/{}/{}'.format(net_vni, direction, description): '',
'/networks/{}/firewall_rules/{}/{}/order'.format(net_vni, direction, description): order,
'/networks/{}/firewall_rules/{}/{}/rule'.format(net_vni, direction, description): rule
})
except Exception as e:
return False, 'ERROR: Failed to write to Zookeeper! Exception: "{}".'.format(e)
return True, 'Firewall rule "{}" added successfully!'.format(description)
def remove_acl(zk_conn, network, rule, direction):
# Validate and obtain standard passed value
net_vni = getNetworkVNI(zk_conn, network)
if net_vni == None:
return False, 'ERROR: Could not find network "{}" in the cluster!'.format(network)
# Change direction to something more usable
if direction:
direction = "in"
else:
direction = "out"
match_description = ''
# Check if the ACL matches a description currently in the database
acl_list = getNetworkACLs(zk_conn, net_vni, direction)
for acl in acl_list:
if acl == rule:
match_description = acl
if not match_description:
return False, 'ERROR: No firewall rule exists matching description "{}"!'.format(rule)
# Remove the entry from zookeeper
try:
zk_conn.delete('/networks/{}/firewall_rules/{}/{}'.format(net_vni, direction, match_description), recursive=True)
except Exception as e:
return False, 'ERROR: Failed to write to Zookeeper! Exception: "{}".'.format(e)
# Update the existing ordering
full_acl_list = getNetworkACLs(zk_conn, net_vni, direction)
updated_orders = {}
for idx, acl in enumerate(full_acl_list):
updated_orders[
'/networks/{}/firewall_rules/{}/{}/order'.format(net_vni, direction, acl)
] = idx
if updated_orders:
try:
zkhandler.writedata(zk_conn, updated_orders)
except Exception as e:
return False, 'ERROR: Failed to write to Zookeeper! Exception: "{}".'.format(e)
return True, 'Firewall rule "{}" removed successfully!'.format(match_description)
def get_info(zk_conn, network, long_output):
# Validate and obtain alternate passed value
net_vni = getNetworkVNI(zk_conn, network)
@ -615,11 +796,45 @@ def get_list_dhcp(zk_conn, network, limit, only_static=False):
return True, ''
def get_list_firewall_rules(zk_conn, network):
def get_list_acl(zk_conn, network, limit, direction):
# Validate and obtain alternate passed value
net_vni = getNetworkVNI(zk_conn, network)
if net_vni == None:
return False, 'ERROR: Could not find network "{}" in the cluster!'.format(network)
firewall_rules = getNetworkFirewallRules(zk_conn, net_vni)
return firewall_rules
# Change direction to something more usable
if direction:
direction = "in"
else:
direction = "out"
acl_list = []
full_acl_list = getNetworkACLs(zk_conn, net_vni, direction)
if limit:
try:
# Implcitly assume fuzzy limits
if re.match('\^.*', limit) == None:
limit = '.*' + limit
if re.match('.*\$', limit) == None:
limit = limit + '.*'
except Exception as e:
return False, 'Regex Error: {}'.format(e)
for idx, acl in enumerate(full_acl_list):
valid_acl = False
if limit:
if re.match(limit, acl) != None:
valid_acl = True
if re.match(limit, str(idx)) != None:
valid_acl = True
else:
valid_acl = True
if valid_acl:
acl_list.append(acl)
output_string = formatACLList(zk_conn, net_vni, direction, acl_list)
click.echo(output_string)
return True, ''