Connectivity check module
- verify_personas_conn for checking connectivity between server persona instances - verify_ping method for icmp checks - verify_udp_connectivity for udp checks - verify_tcp_connectivity for tcp checks - scan_tcp_port for scanning tcp ports Change-Id: I9ef115faf2a4f16e57a1331eb3efb9d85e2ea0ef
This commit is contained in:
Leonardo Maycotte
parent
947a27eb59
commit
216bbb10f3
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@ -0,0 +1,621 @@
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"""
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Copyright 2016 Rackspace
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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"""
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import re
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from cloudcafe.networking.networks.common.constants import PortTypes
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from cloudcafe.networking.networks.common.exceptions \
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import MissingDataException, UnsupportedTypeException
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class Connectivity(object):
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"""Networking connectivity class verifying ICMP, TCP and UDP
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connectivity across server instances.
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"""
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def __init__(self, server_persona_a=None, server_persona_b=None):
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self.server_persona_a = server_persona_a
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self.server_persona_b = server_persona_b
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self.icmp = 'icmp'
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self.tcp = 'tcp'
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self.udp = 'udp'
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self.available_protocols = [self.icmp, self.tcp, self.udp]
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def verify_personas_conn(self, server_persona_a=None,
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server_persona_b=None, port_type='pnet',
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protocol='icmp', ip_version=4, count=None,
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accepted_packet_loss=None, port1=None,
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port2=None, port_range=None,
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expected_data=None, dir_path=None,
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file_name=None):
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"""Verify ICMP/TCP/UDP connectivity from server A to server B using
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all of server's B IP addresses based on port_type (public, service,
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isolated) and version (4 or 6).
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Args:
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server_persona_a (instance): server to send packets from,
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cloudcafe.networking.networks.personas.ServerPersona
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server_persona_b (instance): server to receive (listener),
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cloudcafe.networking.networks.personas.ServerPersona
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port_type (str): network port type, pnet (public),
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snet (service) or inet (isolated).
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protocol (str): protocol to check connectivity for ex.
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icmp, tcp or udp.
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ip_version (int): 4 or 6 for IP address version.
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count (int): used by icmp checks, number of pings, for ex.
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ping -c count (by default 3)
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accepted_packet_loss (int): used by icmp checks (ping),
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fail if packet loss greater (default 0).
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port1 (str): open port on listener, used by TCP and/or UDP.
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port2 (str): open port on listener, ONLY used by TCP.
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port_range (str): ports to scan on listener by sender,
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ONLY used by TCP, for ex. 442-445
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expected_data (list): in TCP, stdout from port scan by sender,
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for ex.
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['442 (tcp) timed out: Operation now in progress',
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'443 port [tcp/*] succeeded!',
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'444 port [tcp/*] succeeded!',
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'445 (tcp) failed: Connection refused']
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In UDP, file content to transmit, for ex.
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'Security Groups UDP testing'
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dir_path (str): directory path to save the file to send/receive
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on the sender and listener. ONLY used by UDP.
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file_name (str): file name to be used for the original and
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received files on the sender and listener. ONLY used by UDP
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Server personas will require the keypair attribute with a private
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key. And, also the ssh_username attribute, for ex. 'root'
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Returns: list of dicts. There will be one dict per server B IP
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address verified based on port type and IP version, and the dict
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will be the response of the verify_ping, verify_tcp_connectivity
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or verify_udp_connectivity method below.
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"""
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if not server_persona_a:
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server_persona_a = self.server_persona_a
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if not server_persona_b:
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server_persona_b = self.server_persona_b
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# Expecting pnet, snet or inet for port type
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expected_types = [PortTypes.PUBLIC, PortTypes.SERVICE,
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PortTypes.ISOLATED]
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if port_type not in expected_types:
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msg = 'Unexpected port type {0}, expected: {1}'.format(
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port_type, expected_types)
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raise UnsupportedTypeException(msg)
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# Expecting icmp, tcp or udp for protocol
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expected_protocols = self.available_protocols
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if protocol not in expected_protocols:
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msg = 'Unexpected protocol {0}, expected: {1}'.format(
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protocol, expected_protocols)
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raise UnsupportedTypeException(msg)
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# Getting the IP addresses based on port type and IP version
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attr_label = '{0}_fix_ipv{1}'.format(port_type, ip_version)
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ip_addresses = getattr(server_persona_b, attr_label, None)
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if ip_addresses is None:
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msg = ('Missing expected data at server persona\n'
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'Server Persona: instance of networking.networks.personas\n'
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'Port Types: {0}\n'
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'Version: 4 or 6').format(expected_types)
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raise MissingDataException(msg)
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# Defining the remote client sender (FROM) server
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remote_client_a = server_persona_a.remote_client
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# Defining the remote client listener (TO) server
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if protocol == self.tcp or protocol == self.udp:
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remote_client_b = server_persona_b.remote_client
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else:
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remote_client_b = None
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# Defining the method parameters
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kw_args = dict(
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sender_client=remote_client_a, listener_client=remote_client_b,
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port_type=port_type, ip_version=ip_version, count=count,
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accepted_packet_loss=accepted_packet_loss, port1=port1,
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port2=port2, port_range=port_range, expected_data=expected_data,
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dir_path=dir_path, udp_file_name=file_name)
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# Removing params without value
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params = dict((k, v) for k, v in kw_args.iteritems() if v)
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results = []
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for ip_address in ip_addresses:
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params.update(listener_ip=ip_address)
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if protocol == self.icmp:
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result = self.verify_ping(**params)
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results.append(result)
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elif protocol == self.tcp:
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result = self.verify_tcp_connectivity(**params)
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results.append(result)
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elif protocol == self.udp:
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result = self.verify_udp_connectivity(**params)
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results.append(result)
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return results
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def verify_ping(self, sender_client, listener_ip, ip_version=4,
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count=3, accepted_packet_loss=0, port_type=None):
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"""Verify ICMP connectivity between two servers using the remote client
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Args:
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sender_client (instance): cloudcafe.compute.common.clients.
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remote_instance.linux.linux_client.LinuxClient
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listener_ip (str): IP address to ping
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ip_version (int): version of IP address
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count (int): number of pings, for ex. ping -c count (by default 3)
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accepted_packet_loss (int): fail if packet loss greater (default 0)
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port_type (Optional[str]): network port type, pnet (public),
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snet (service) or inet (isolated).
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Returns:
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dict with the following keys and values:
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to_ip (str): IP address to ping.
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ip_version (int): IP address (to ping) version, 4 or 6.
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sender_hostname (str): sender server hostname.
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sender_public_ip (str): sender server public IP address.
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sender_cmd (str): ping command to execute on the sender.
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sender_cmd_output (instance): sender ping command output.
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cafe.engine.ssh.models.ssh_response.ExecResponse
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port_type (str): pnet (public), snet (service) or
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inet (isolated).
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connection (bool): True if packet_loss less than accepted
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packet loss, False otherwise.
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msg (str): ping message.
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packet_loss (int): packet loss from ping.
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accepted_packet_loss (int): accepted packet loss by user.
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"""
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ping_packet_loss_regex = '(\d{1,3})\.?\d*\%.*loss'
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sender_hostname = sender_client.get_hostname()
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sender_public_ip = sender_client.ip_address
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if ip_version == 6:
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ping_cmd = 'ping6 -c {0} {1}'.format(count, listener_ip)
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else:
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ping_cmd = 'ping -c {0} {1}'.format(count, listener_ip)
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resp = sender_client.ssh_client.execute_command(ping_cmd)
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loss_pct_search = re.search(ping_packet_loss_regex, resp.stdout)
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result = dict(ip_version=ip_version, sender_hostname=sender_hostname,
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port_type=port_type, sender_public_ip=sender_public_ip,
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to_ip=listener_ip, sender_cmd=ping_cmd,
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sender_cmd_output=resp)
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if loss_pct_search is None:
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umsg = ('Ping from {0} to {1} got unexpected output:\n{2}'
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'').format(sender_public_ip, listener_ip, resp)
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result.update(connection=False, msg=umsg)
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return result
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loss_pct = loss_pct_search.group(0)
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index = loss_pct.find('%')
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loss_pct_num = int(loss_pct[:index])
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msg = ('Ping from {0} to {1} packet loss: {2}%. '
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'Accepted packet loss: {3}%').format(
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sender_public_ip, listener_ip,
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loss_pct_num, accepted_packet_loss)
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result.update(packet_loss=loss_pct_num,
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accepted_packet_loss=accepted_packet_loss)
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# Set connection to False if packet loss greater than accepted
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if loss_pct_num > accepted_packet_loss:
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result.update(connection=False, msg=msg)
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return result
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result.update(connection=True, msg=msg)
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return result
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def verify_udp_connectivity(self, listener_client, sender_client,
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listener_ip, port1='750', expected_data=None,
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ip_version=4, port_type=None, dir_path='/root',
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file_name='udp_transfer'):
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"""Verify UDP port connectivity between two servers transmitting
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file contents.
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This is done enabling UDP port listening in a server (listener), with
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netcat, to store a file running a command like:
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$nc -ul 750 > received_file
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And sending a file from another server (sender), running
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a command like:
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$nc -unv 10.22.253.5 750 -w 3 < original_file
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Note: received_file and original_file can have the same name.
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Args:
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listener_client (instance): receives UDP packets (a file)
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cloudcafe.compute.common.clients.remote_instance.
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linux.linux_client.LinuxClient
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sender_client (instance): sends UDP packets (a file)
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cloudcafe.compute.common.clients.remote_instance.
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linux.linux_client.LinuxClient
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listener_ip (str): listener IP address to be used by netcat from
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the sender (public, service or isolated network IP)
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port1 (str): open port on listener and to be used by sender.
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expected_data (str): file content to transmit, for ex.
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'Security Groups UDP testing'
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ip_version (int): version of IP address
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port_type (Optional[str]): network port type, pnet (public),
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snet (service) or inet (isolated).
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dir_path (str): directory path to save the file to send/receive
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on the sender and listener.
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file_name (str): file name to be used for the original and
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received files on the sender and listener.
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Returns:
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dict with the following keys and values:
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to_ip (str): IP address for TCP.
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ip_version (int): listener_ip IP version, 4 or 6.
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listener_hostname (str): listener server hostname.
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sender_hostname (str): sender server hostname.
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listener_public_ip (str): listener server public IP address.
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sender_public_ip (str): sender server public IP address.
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listener_cmd (str): netcat command to execute on the listener.
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sender_cmd (str): netcat command to execute on the sender.
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listener_cmd_output (instance): listener netcat command output.
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cafe.engine.ssh.models.ssh_response.ExecResponse
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sender_cmd_output (instance): sender netcat command output.
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cafe.engine.ssh.models.ssh_response.ExecResponse
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listener_ok (bool): True for expected listener command output.
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sender_ok (bool): True for expected sender command output.
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port_type (str): pnet (public), snet (service) or
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inet (isolated).
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connection (bool): status of UDP connection between sender and
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listener.
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msg (str): error or failure message if needed.
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file_name (str): file name to be used for the original and
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received files on the sender and listener.
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file_path (str): directory path with file name of transmitted
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file. Sent/Received file.
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file_created_at_sender (bool): if the file was successfully
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created at the sender.
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file_created_at_listener (bool): if the file was successfully
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created at the listener.
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file_content (str): transfered file content in listener file.
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expected_data (str): file content to send from sender file.
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"""
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listener_hostname = listener_client.get_hostname()
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sender_hostname = sender_client.get_hostname()
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listener_public_ip = listener_client.ip_address
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sender_public_ip = sender_client.ip_address
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# Setting the directory path and file name of the file to transfer.
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file_path = '{0}/{1}'.format(dir_path, file_name)
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# Defining the expected data (file content) to transfer via UDP
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if not expected_data:
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expected_data = 'Security Groups UDP testing'
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# Deleting the file (to transfer) if it exists
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if sender_client.is_file_present(file_path=file_path):
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sender_client.delete_file(file_path=file_path)
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if listener_client.is_file_present(file_path=file_path):
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listener_client.delete_file(file_path=file_path)
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# Creating the file to transfer for UDP testing
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sender_client.create_file(file_name=file_name,
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file_content=expected_data,
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file_path=dir_path)
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file_created_at_sender = sender_client.is_file_present(
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file_path=file_path)
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result = dict(to_ip=listener_ip,
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ip_version=ip_version,
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listener_hostname=listener_hostname,
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sender_hostname=sender_hostname,
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listener_public_ip=listener_public_ip,
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sender_public_ip=sender_public_ip,
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listener_cmd=None,
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sender_cmd=None,
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listener_cmd_output=None,
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sender_cmd_output=None,
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listener_ok=None,
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sender_ok=None,
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port_type=port_type,
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connection=None,
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msg=None,
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file_name=file_name,
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file_path=file_path,
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file_created_at_sender=file_created_at_sender,
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file_created_at_listener=None,
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file_content=None,
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expected_data=expected_data)
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if not file_created_at_sender:
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msg = 'Unable to create transfer file at sender server'
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result.update(msg=msg)
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return result
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# Defining netcat options for the listener and sender based on version
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if ip_version == 6:
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listener_opts = '-ul -6'
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sender_opts = '-unv -6'
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else:
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listener_opts = '-ul'
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sender_opts = '-unv'
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listener_cmd = 'nc {opts} {port1} > {file_name}'.format(
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opts=listener_opts, port1=port1, file_name=file_name)
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sender_cmd = ('nc {opts} {ip_address} {port1} -w 3 < '
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'{file_name}').format(opts=sender_opts,
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ip_address=listener_ip,
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port1=port1, file_name=file_name)
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# Setting up the listener
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listener_cmd_output = listener_client.ssh_client.execute_shell_command(
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listener_cmd)
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listener_ok = listener_cmd in listener_cmd_output.stdout
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result.update(listener_cmd=listener_cmd,
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sender_cmd=sender_cmd,
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listener_cmd_output=listener_cmd_output,
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listener_ok=listener_ok)
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if not listener_ok:
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msg = 'Unexpected shell command listener output'
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result.update(msg=msg)
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return result
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sender_cmd_output = sender_client.ssh_client.execute_command(
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sender_cmd)
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sender_ok = (listener_ip in sender_cmd_output.stderr and
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port1 in sender_cmd_output.stderr and
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'succeeded!' in sender_cmd_output.stderr)
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result.update(sender_cmd_output=sender_cmd_output, sender_ok=sender_ok)
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if not sender_ok:
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msg = 'Unexpected shell command sender output'
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result.update(msg=msg)
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return result
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# Checking the file was created at the listener
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file_created_at_listener = listener_client.is_file_present(
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file_path=file_path)
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result.update(file_created_at_listener=file_created_at_listener)
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if not file_created_at_listener:
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msg = 'Transfer file missing at the listener server'
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result.update(msg=msg)
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return result
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# Getting the file contents in the listener
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transfered_file = listener_client.get_file_details(file_path=file_path)
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file_content = transfered_file.content
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result.update(file_content=file_content)
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if expected_data in file_content:
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result.update(connection=True)
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return result
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result.update(connection=False)
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msg = ('Unexpected transfered file content, expected data '
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'not found in transfered file contents')
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result.update(msg=msg)
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return result
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def verify_tcp_connectivity(self, listener_client, sender_client,
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listener_ip, port1='443', port2='444',
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port_range='443-444', expected_data=None,
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ip_version=4, port_type=None):
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"""Verify TCP port connectivity between two servers
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This is done enabling port listening in a server (listener), with
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netcat, running a command like:
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$nc -l 443 & nc -l 444
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And scanning these ports from another server (sender), running
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a command like:
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nc -nvz 10.22.253.15 442-445 -w 2
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Args:
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listener_client (instance): receives TCP packets
|
||||
cloudcafe.compute.common.clients.remote_instance.
|
||||
linux.linux_client.LinuxClient
|
||||
sender_client (instance): sends TCP packets
|
||||
cloudcafe.compute.common.clients.remote_instance.
|
||||
linux.linux_client.LinuxClient
|
||||
listener_ip (str): listener IP address to be used by netcat from
|
||||
the sender
|
||||
port1 (str): open port on listener
|
||||
port2 (str): open port on listener
|
||||
port_range (str): ports to scan on listener by sender, for ex.
|
||||
442-445
|
||||
expected_data (list): stdout from port scan by sender, for ex.
|
||||
['442 (tcp) timed out: Operation now in progress',
|
||||
'443 port [tcp/*] succeeded!',
|
||||
'444 port [tcp/*] succeeded!',
|
||||
'445 (tcp) failed: Connection refused']
|
||||
ip_version (int): version of IP address
|
||||
port_type (Optional[str]): network port type, pnet (public),
|
||||
snet (service) or inet (isolated).
|
||||
|
||||
Returns:
|
||||
dict with the following keys and values:
|
||||
to_ip (str): IP address for UDP.
|
||||
ip_version (int): listener_ip IP version, 4 or 6.
|
||||
listener_hostname (str): listener server hostname.
|
||||
sender_hostname (str): sender server hostname.
|
||||
listener_public_ip (str): listener server public IP address.
|
||||
sender_public_ip (str): sender server public IP address.
|
||||
listener_cmd (str): netcat command to execute on the listener.
|
||||
sender_cmd (str): netcat command to execute on the sender.
|
||||
listener_cmd_output (instance): listener netcat command output.
|
||||
cafe.engine.ssh.models.ssh_response.ExecResponse
|
||||
sender_cmd_output (instance): sender netcat command output.
|
||||
cafe.engine.ssh.models.ssh_response.ExecResponse
|
||||
listener_ok (bool): True for expected listener command output.
|
||||
port_type (str): pnet (public), snet (service) or
|
||||
inet (isolated).
|
||||
connection (bool): status of TCP connection between sender and
|
||||
listener.
|
||||
msg (str): error or failure message if needed.
|
||||
expected_data (list): expected_data given as input.
|
||||
|
||||
"""
|
||||
|
||||
listener_hostname = listener_client.get_hostname()
|
||||
sender_hostname = sender_client.get_hostname()
|
||||
listener_public_ip = listener_client.ip_address
|
||||
sender_public_ip = sender_client.ip_address
|
||||
|
||||
# Defining the expected data if not given (TCP port scan output)
|
||||
if not expected_data:
|
||||
expected_data = ['443 port [tcp/*] succeeded!',
|
||||
'444 port [tcp/*] succeeded!']
|
||||
|
||||
# Defining netcat options for the listener and sender based on version
|
||||
if ip_version == 6:
|
||||
listener_opts = '-l -6'
|
||||
sender_opts = '-nvz -6'
|
||||
else:
|
||||
listener_opts = '-l'
|
||||
sender_opts = '-nvz'
|
||||
|
||||
listener_cmd = 'nc {opts} {port1} & nc {opts} {port2} &'.format(
|
||||
opts=listener_opts, port1=port1, port2=port2)
|
||||
sender_cmd = 'nc {opts} {ip_address} {port_range} -w 2'.format(
|
||||
opts=sender_opts, ip_address=listener_ip, port_range=port_range)
|
||||
|
||||
listener_cmd_output = listener_client.ssh_client.execute_shell_command(
|
||||
listener_cmd)
|
||||
listener_ok = listener_cmd in listener_cmd_output.stdout
|
||||
|
||||
result = dict(to_ip=listener_ip,
|
||||
ip_version=ip_version,
|
||||
listener_hostname=listener_hostname,
|
||||
sender_hostname=sender_hostname,
|
||||
listener_public_ip=listener_public_ip,
|
||||
sender_public_ip=sender_public_ip,
|
||||
listener_cmd=listener_cmd,
|
||||
sender_cmd=sender_cmd,
|
||||
listener_cmd_output=listener_cmd_output,
|
||||
sender_cmd_output=None,
|
||||
listener_ok=listener_ok,
|
||||
port_type=port_type,
|
||||
connection=None,
|
||||
msg=None,
|
||||
expected_data=expected_data)
|
||||
|
||||
if not listener_ok:
|
||||
msg = 'Unexpected shell command listener output'
|
||||
result.update(msg=msg)
|
||||
return result
|
||||
|
||||
sender_cmd_output = sender_client.ssh_client.execute_command(
|
||||
sender_cmd)
|
||||
result.update(sender_cmd_output=sender_cmd_output)
|
||||
|
||||
for data in expected_data:
|
||||
verify_data = data in sender_cmd_output.stderr
|
||||
if not verify_data:
|
||||
msg = ('Received unexpected sender_cmd_output compared to '
|
||||
'the expected data')
|
||||
result.update(msg=msg)
|
||||
result.update(connection=False)
|
||||
return result
|
||||
|
||||
result.update(connection=True)
|
||||
return result
|
||||
|
||||
def scan_tcp_port(self, sender_client, listener_ip, port1='22',
|
||||
expected_data=None, ip_version=4, port_type=None):
|
||||
"""Scan a TCP port connectivity between two servers
|
||||
|
||||
Scanning is done from the sender server client to the listener IP,
|
||||
running a command like:
|
||||
nc -nvz -6 2001:4802:7800:1:be76:4eff:fe20:d235 22 -w 2
|
||||
|
||||
Args:
|
||||
sender_client (instance): sends TCP packets
|
||||
cloudcafe.compute.common.clients.remote_instance.
|
||||
linux.linux_client.LinuxClient
|
||||
listener_ip (str): listener IP address to be used by netcat from
|
||||
the sender
|
||||
port1 (str): port to scan from sender on listener
|
||||
expected_data (str): stdout from port scan by sender, for ex.
|
||||
'22 port [tcp/*] succeeded!'
|
||||
or '450 (tcp) failed: Connection refused'
|
||||
or '442 (tcp) timed out: Operation now in progress'
|
||||
ip_version (int): version of IP address
|
||||
port_type (Optional[str]): network port type, pnet (public),
|
||||
snet (service) or inet (isolated).
|
||||
|
||||
Returns:
|
||||
dict with the following keys and values:
|
||||
to_ip (str): IP address to use to scan.
|
||||
ip_version (int): listener_ip IP version, 4 or 6.
|
||||
sender_hostname (str): sender server hostname.
|
||||
sender_cmd (str): netcat command to execute on the sender.
|
||||
sender_cmd_output (instance): sender netcat command output.
|
||||
cafe.engine.ssh.models.ssh_response.ExecResponse
|
||||
port_type (str): pnet (public), snet (service) or
|
||||
inet (isolated).
|
||||
connection (bool): status of TCP connection between sender and
|
||||
listener.
|
||||
msg (str): seuccess, error or failure message if needed.
|
||||
expected_data (str): expected_data given as input.
|
||||
"""
|
||||
|
||||
sender_hostname = sender_client.get_hostname()
|
||||
sender_public_ip = sender_client.ip_address
|
||||
|
||||
# Defining the expected data if not given (TCP port scan output)
|
||||
if not expected_data:
|
||||
expected_data = '22 port [tcp/*] succeeded!'
|
||||
|
||||
# Defining netcat options for the listener and sender based on version
|
||||
if ip_version == 6:
|
||||
sender_opts = '-nvz -6'
|
||||
else:
|
||||
sender_opts = '-nvz'
|
||||
|
||||
sender_cmd = 'nc {opts} {ip_address} {port} -w 2'.format(
|
||||
opts=sender_opts, ip_address=listener_ip, port=port1)
|
||||
|
||||
result = dict(to_ip=listener_ip,
|
||||
ip_version=ip_version,
|
||||
sender_hostname=sender_hostname,
|
||||
sender_public_ip=sender_public_ip,
|
||||
sender_cmd=sender_cmd,
|
||||
sender_cmd_output=None,
|
||||
port_type=port_type,
|
||||
connection=None,
|
||||
msg=None,
|
||||
expected_data=expected_data)
|
||||
|
||||
sender_cmd_output = sender_client.ssh_client.execute_command(
|
||||
sender_cmd)
|
||||
result.update(sender_cmd_output=sender_cmd_output)
|
||||
|
||||
verify_data = expected_data in sender_cmd_output.stderr
|
||||
if not verify_data:
|
||||
msg = ('Received unexpected sender_cmd_output compared to '
|
||||
'the expected data')
|
||||
result.update(msg=msg)
|
||||
result.update(connection=False)
|
||||
return result
|
||||
|
||||
result.update(connection=True)
|
||||
return result
|
||||
Loading…
Reference in New Issue