Some major tweaks to make DHCP reservations work with the server
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3775edf415
commit
4d350ced7e
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@ -747,11 +747,6 @@ def net_dhcp():
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# pvc network dhcp add
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###############################################################################
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@click.command(name='add', short_help='Add a DHCP reservation to a virtual network.')
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@click.option(
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'-d', '--description', 'description',
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default=None,
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help='Description of the DHCP reservation; defaults to MACADDR if unspecified; should not contain whitespace.'
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)
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@click.argument(
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'net'
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)
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@ -761,13 +756,16 @@ def net_dhcp():
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@click.argument(
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'macaddr'
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)
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def net_dhcp_add(net, ipaddr, macaddr, description):
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@click.argument(
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'hostname'
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)
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def net_dhcp_add(net, ipaddr, macaddr, hostname):
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"""
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Add a new DHCP reservation of IP address IPADDR for MAC address MACADDR to virtual network NET; NET can be either a VNI or description.
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Add a new DHCP reservation of host HOSTNAME with IP address IPADDR for MAC address MACADDR to virtual network NET; NET can be either a VNI or description.
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"""
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zk_conn = pvc_common.startZKConnection(zk_host)
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retcode, retmsg = pvc_network.add_dhcp_reservation(zk_conn, net, ipaddr, macaddr, description)
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retcode, retmsg = pvc_network.add_dhcp_reservation(zk_conn, net, ipaddr, macaddr, hostname)
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cleanup(retcode, retmsg, zk_conn)
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###############################################################################
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@ -101,7 +101,7 @@ def getNetworkDescription(zk_conn, network):
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return net_description
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def getNetworkDHCPReservations(zk_conn, vni):
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# Get a list of VNIs by listing the children of /networks/<vni>/dhcp_reservations
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# Get a list of VNIs by listing the children of /networks/<vni>/dhcp_leases
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dhcp_reservations = []
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dhcp_leases = zk_conn.get_children('/networks/{}/dhcp_leases'.format(vni))
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for lease in dhcp_leases:
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@ -125,10 +125,10 @@ def getNetworkInformation(zk_conn, vni):
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return description, domain, ip_network, ip_gateway, dhcp_flag, dhcp_start, dhcp_end
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def getDHCPReservationInformation(zk_conn, vni, macaddr):
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description = zkhandler.readdata(zk_conn, '/networks/{}/dhcp_leases/{}/description'.format(vni, macaddr))
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hostname = zkhandler.readdata(zk_conn, '/networks/{}/dhcp_leases/{}/hostname'.format(vni, macaddr))
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ip_address = zkhandler.readdata(zk_conn, '/networks/{}/dhcp_leases/{}/ipaddr'.format(vni, macaddr))
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mac_address = macaddr
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return description, ip_address, mac_address
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return hostname, ip_address, mac_address
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def formatNetworkInformation(zk_conn, vni, long_output):
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description, domain, ip_network, ip_gateway, dhcp_flag, dhcp_start, dhcp_end = getNetworkInformation(zk_conn, vni)
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@ -301,26 +301,26 @@ def formatNetworkList(zk_conn, net_list):
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def formatDHCPReservationList(zk_conn, vni, dhcp_reservations_list):
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dhcp_reservation_list_output = []
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description = {}
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hostname = {}
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ip_address = {}
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mac_address = {}
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# Gather information for printing
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for dhcp_reservation in dhcp_reservations_list:
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# get info
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description[dhcp_reservation], ip_address[dhcp_reservation], mac_address[dhcp_reservation] = getDHCPReservationInformation(zk_conn, vni, dhcp_reservation)
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hostname[dhcp_reservation], ip_address[dhcp_reservation], mac_address[dhcp_reservation] = getDHCPReservationInformation(zk_conn, vni, dhcp_reservation)
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# Determine optimal column widths
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# Dynamic columns: node_name, hypervisor, migrated
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reservation_description_length = 13
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reservation_hostname_length = 13
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reservation_ip_address_length = 11
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reservation_mac_address_length = 13
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for dhcp_reservation in dhcp_reservations_list:
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# description column
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_reservation_description_length = len(description[dhcp_reservation]) + 1
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if _reservation_description_length > reservation_description_length:
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reservation_description_length = _reservation_description_length
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# hostname column
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_reservation_hostname_length = len(hostname[dhcp_reservation]) + 1
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if _reservation_hostname_length > reservation_hostname_length:
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reservation_hostname_length = _reservation_hostname_length
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# ip_network column
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_reservation_ip_address_length = len(ip_address[dhcp_reservation]) + 1
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if _reservation_ip_address_length > reservation_ip_address_length:
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@ -332,32 +332,32 @@ def formatDHCPReservationList(zk_conn, vni, dhcp_reservations_list):
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# Format the string (header)
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dhcp_reservation_list_output_header = '{bold}\
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{reservation_description: <{reservation_description_length}} \
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{reservation_hostname: <{reservation_hostname_length}} \
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{reservation_ip_address: <{reservation_ip_address_length}} \
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{reservation_mac_address: <{reservation_mac_address_length}} \
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{end_bold}'.format(
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bold=ansiiprint.bold(),
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end_bold=ansiiprint.end(),
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reservation_description_length=reservation_description_length,
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reservation_hostname_length=reservation_hostname_length,
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reservation_ip_address_length=reservation_ip_address_length,
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reservation_mac_address_length=reservation_mac_address_length,
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reservation_description='Description',
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reservation_hostname='Hostname',
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reservation_ip_address='IP Address',
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reservation_mac_address='MAC Address'
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)
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for dhcp_reservation in dhcp_reservations_list:
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dhcp_reservation_list_output.append('{bold}\
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{reservation_description: <{reservation_description_length}} \
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{reservation_hostname: <{reservation_hostname_length}} \
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{reservation_ip_address: <{reservation_ip_address_length}} \
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{reservation_mac_address: <{reservation_mac_address_length}} \
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{end_bold}'.format(
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bold='',
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end_bold='',
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reservation_description_length=reservation_description_length,
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reservation_hostname_length=reservation_hostname_length,
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reservation_ip_address_length=reservation_ip_address_length,
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reservation_mac_address_length=reservation_mac_address_length,
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reservation_description=description[dhcp_reservation],
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reservation_hostname=hostname[dhcp_reservation],
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reservation_ip_address=ip_address[dhcp_reservation],
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reservation_mac_address=mac_address[dhcp_reservation]
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)
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@ -415,7 +415,7 @@ def add_network(zk_conn, vni, description, domain, ip_network, ip_gateway, dhcp_
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'/networks/{}/dhcp_flag'.format(vni): str(dhcp_flag),
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'/networks/{}/dhcp_start'.format(vni): dhcp_start,
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'/networks/{}/dhcp_end'.format(vni): dhcp_end,
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'/networks/{}/dhcp_reservations'.format(vni): '',
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'/networks/{}/dhcp_leases'.format(vni): '',
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'/networks/{}/firewall_rules'.format(vni): ''
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})
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@ -434,7 +434,6 @@ def modify_network(zk_conn, vni, **parameters):
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if parameters['dhcp_flag'] != None:
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zk_data.update({'/networks/{}/dhcp_flag'.format(vni): str(parameters['dhcp_flag'])})
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print(zk_data)
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zkhandler.writedata(zk_conn, zk_data)
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return True, 'Network "{}" modified successfully!'.format(vni)
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@ -455,7 +454,7 @@ def remove_network(zk_conn, network):
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return True, 'Network "{}" removed successfully!'.format(description)
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def add_dhcp_reservation(zk_conn, network, ipaddress, macaddress, description):
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def add_dhcp_reservation(zk_conn, network, ipaddress, macaddress, hostname):
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# Validate and obtain standard passed value
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net_vni = getNetworkVNI(zk_conn, network)
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if net_vni == None:
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@ -470,23 +469,20 @@ def add_dhcp_reservation(zk_conn, network, ipaddress, macaddress, description):
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if not isValidIP(ipaddress):
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return False, 'ERROR: IP address "{}" is not valid!'.format(macaddress)
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if not description:
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description = macaddress
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if zk_conn.exists('/networks/{}/dhcp_leases/{}'.format(net_vni, macaddress)):
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return False, 'ERROR: A reservation with MAC "{}" already exists!'.format(macaddress)
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# Add the new network to ZK
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# Add the new static lease to ZK
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try:
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zkhandler.writedata(zk_conn, {
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'/networks/{}/dhcp_reservations/{}'.format(net_vni, macaddr): description,
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'/networks/{}/dhcp_reservations/{}/description'.format(net_vni, macaddr): description,
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'/networks/{}/dhcp_reservations/{}/ipaddr'.format(net_vni, macaddr): ipaddress
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'/networks/{}/dhcp_leases/{}'.format(net_vni, macaddress): 'static',
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'/networks/{}/dhcp_leases/{}/hostname'.format(net_vni, macaddress): hostname,
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'/networks/{}/dhcp_leases/{}/ipaddr'.format(net_vni, macaddress): ipaddress
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})
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except Exception as e:
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return False, 'ERROR: Failed to write to Zookeeper! Exception: "{}".'.format(e)
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return True, 'DHCP reservation "{}" added successfully!'.format(description)
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return True, 'DHCP reservation "{}" added successfully!'.format(macaddress)
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def remove_dhcp_reservation(zk_conn, network, reservation):
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# Validate and obtain standard passed value
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@ -499,12 +495,12 @@ def remove_dhcp_reservation(zk_conn, network, reservation):
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# Check if the reservation matches a description, a mac, or an IP address currently in the database
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reservation_list = zk_conn.get_children('/networks/{}/dhcp_leases'.format(net_vni))
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for macaddr in reservation_list:
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timestamp = zkhandler.readdata(zk_conn, macaddr)
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timestamp = zkhandler.readdata(zk_conn, '/networks/{}/dhcp_leases/{}'.format(net_vni, macaddr))
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if timestamp != 'static':
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continue
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description = zkhandler.readdata(zk_conn, '/networks/{}/dhcp_leases/{}/description'.format(net_vni, macaddr))
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hostname = zkhandler.readdata(zk_conn, '/networks/{}/dhcp_leases/{}/hostname'.format(net_vni, macaddr))
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ipaddress = zkhandler.readdata(zk_conn, '/networks/{}/dhcp_leases/{}/ipaddr'.format(net_vni, macaddr))
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if reservation == macaddr or reservation == description or reservation == ipaddress:
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if reservation == macaddr or reservation == hostname or reservation == ipaddress:
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match_description = macaddr
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if not match_description:
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@ -610,50 +610,58 @@ class CSVDatabase(object):
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class ZKDatabase(object):
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# Store DHCP leases in zookeeper
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# /networks/<VNI>/dhcp_leases/<MAC>:<timestamp>/{ipaddr,description/hostname}
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# /networks/<VNI>/dhcp_leases/<MAC>:<timestamp>/{ipaddr,hostname}
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# Line:
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# ['52:54:00:21:34:11', '10.10.10.6', 'test1', '1538287572']
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def __init__(self, zk_conn, key):
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self.zk_conn = zk_conn
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self.key = key
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zkhandler.writedata(self.zk_conn, { self.key: '' }) # Create base key
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def get(self, pattern):
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pattern = list(pattern)
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return [line for line in self.all() if pattern == line]
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return [line for line in self.all() if pattern[0] == line[0] or pattern[1] == line[1] or pattern[2] == line[2]]
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def isstatic(self, pattern):
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macaddr = pattern[0]
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try:
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timestamp = zkhandler.readdata(self.zk_conn, '{}/{}'.format(self.key, macaddr))
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if timestamp == 'static':
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return True
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else:
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return False
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except Exception:
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return False
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def add(self, line):
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macaddr = line[0]
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ipaddr = line[1]
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description = line[2]
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hostname = line[2]
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timestamp = line[3]
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zkhandler.writedata(self.zk_conn, {
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'{}/{}'.format(self.key, macaddr): timestamp,
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'{}/{}/ipaddr'.format(self.key, macaddr): ipaddr,
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'{}/{}/description'.format(self.key, macaddr): description
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'{}/{}/hostname'.format(self.key, macaddr): hostname
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})
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def delete(self, pattern):
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macaddr = pattern[0]
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try:
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timestamp = zkhandler.readdata(self.zk_conn, '{}/{}'.format(self.key, macaddr))
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if timestamp != 'static':
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zkhandler.delete(self.zk_conn, '{}/{}'.format(self.key, macaddr))
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return True
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zkhandler.delete(self.zk_conn, '{}/{}'.format(self.key, macaddr))
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except Exception:
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pass
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return False
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def all(self):
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leases = []
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mac_list = zkhandler.listchildren(self.zk_conn, self.key)
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for macaddr in mac_list:
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timestamp = zkhandler.readdata(self.zk_conn, '{}/{}'.format(self.key, macaddr))
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if timestamp == 'static':
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timestamp = 0
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ipaddr = zkhandler.readdata(self.zk_conn, '{}/{}/ipaddr'.format(self.key, macaddr))
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description = zkhandler.readdata(self.zk_conn, '{}/{}/description'.format(self.key, macaddr))
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leases.append([macaddr, ipaddr, description, timestamp])
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hostname = zkhandler.readdata(self.zk_conn, '{}/{}/hostname'.format(self.key, macaddr))
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leases.append([macaddr, ipaddr, hostname, timestamp])
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return leases
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@ -716,11 +724,15 @@ class HostDatabase(object):
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pattern = host.to_pattern()
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self.db.delete(pattern)
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def isstatic(self, host):
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return self.db.isstatic(host.to_tuple())
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def all(self):
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return list(map(Host.from_tuple, self.db.all()))
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def replace(self, host):
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if self.delete(host):
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if not self.isstatic(host):
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self.delete(host)
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self.add(host)
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def sorted_hosts(hosts):
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@ -752,14 +764,16 @@ class DHCPServer(object):
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def update(self, timeout = 0):
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try:
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reads = select.select([self.socket], [], [], timeout)[0]
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except ValueError:
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except ValueError as e:
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# ValueError: file descriptor cannot be a negative integer (-1)
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print(e)
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return
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for socket in reads:
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try:
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packet = ReadBootProtocolPacket(*socket.recvfrom(4096))
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except OSError:
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except OSError as e:
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# OSError: [WinError 10038] An operation was attempted on something that is not a socket
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print(e)
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pass
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else:
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self.received(packet)
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@ -793,7 +807,7 @@ class DHCPServer(object):
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known_hosts = self.hosts.get(mac = CASEINSENSITIVE(mac_address))
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ip = None
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if known_hosts:
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# 1. choose known ip address
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# 1. choose known ip address (including static lease)
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for host in known_hosts:
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if self.is_valid_client_address(host.ip):
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ip = host.ip
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