aboutsummaryrefslogtreecommitdiffstats
path: root/resources/libraries/python/HoststackUtil.py
blob: 9e6e20014cfcef38c0b005f2dffbb2c8401eb216 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
# Copyright (c) 2020 Cisco and/or its affiliates.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""Host Stack util library."""
from time import sleep
from robot.api import logger

from resources.libraries.python.ssh import exec_cmd, exec_cmd_no_error
from resources.libraries.python.PapiExecutor import PapiSocketExecutor
from resources.libraries.python.DUTSetup import DUTSetup

class HoststackUtil():
    """Utilities for Host Stack tests."""

    @staticmethod
    def get_vpp_echo_command(vpp_echo_attributes):
        """Construct the vpp_echo command using the specified attributes.

        :param vpp_echo_attributes: vpp_echo test program attributes.
        :type vpp_echo_attributes: dict
        :returns: Command line components of the vpp_echo command
            'name' - program name
            'args' - command arguments.
        :rtype: dict
        """
        # TODO: Use a python class instead of dictionary for the return type
        proto = vpp_echo_attributes[u"uri_protocol"]
        addr = vpp_echo_attributes[u"uri_ip4_addr"]
        port = vpp_echo_attributes[u"uri_port"]
        vpp_echo_cmd = {}
        vpp_echo_cmd[u"name"] = u"vpp_echo"
        vpp_echo_cmd[u"args"] = f"{vpp_echo_attributes[u'role']} " \
            f"socket-name {vpp_echo_attributes[u'vpp_api_socket']} " \
            f"{vpp_echo_attributes[u'json_output']} " \
            f"uri {proto}://{addr}/{port} " \
            f"nclients {vpp_echo_attributes[u'nclients']} " \
            f"quic-streams {vpp_echo_attributes[u'quic_streams']} " \
            f"time {vpp_echo_attributes[u'time']} " \
            f"fifo-size {vpp_echo_attributes[u'fifo_size']} " \
            f"TX={vpp_echo_attributes[u'tx_bytes']} " \
            f"RX={vpp_echo_attributes[u'rx_bytes']}"
        if vpp_echo_attributes[u"rx_results_diff"]:
            vpp_echo_cmd[u"args"] += u" rx-results-diff"
        if vpp_echo_attributes[u"tx_results_diff"]:
            vpp_echo_cmd[u"args"] += u" tx-results-diff"
        return vpp_echo_cmd

    @staticmethod
    def set_hoststack_quic_fifo_size(node, fifo_size):
        """Set the QUIC protocol fifo size.

        :param node: Node to set the QUIC fifo size on.
        :param fifo_size: fifo size, passed to the quic set fifo-size command.
        :type node: dict
        :type fifo_size: str
        """
        cmd = f"quic set fifo-size {fifo_size}"
        PapiSocketExecutor.run_cli_cmd(node, cmd)

    @staticmethod
    def set_hoststack_quic_crypto_engine(node, quic_crypto_engine,
                                         fail_on_error=False):
        """Set the Hoststack QUIC crypto engine on node

        :param node: Node to enable/disable HostStack.
        :param quic_crypto_engine: type of crypto engine
        :type node: dict
        :type quic_crypto_engine: str
        """
        vpp_crypto_engines = {u"openssl", u"ia32", u"ipsecmb"}
        if quic_crypto_engine == u"nocrypto":
            logger.trace(u"No QUIC crypto engine.")
            return

        if quic_crypto_engine in vpp_crypto_engines:
            cmds = [u"quic set crypto api vpp",
                    f"set crypto handler aes-128-gcm {quic_crypto_engine}",
                    f"set crypto handler aes-256-gcm {quic_crypto_engine}"]
        elif quic_crypto_engine == u"picotls":
            cmds = [u"quic set crypto api picotls"]
        else:
            raise ValueError(f"Unknown QUIC crypto_engine {quic_crypto_engine}")

        for cmd in cmds:
            try:
                PapiSocketExecutor.run_cli_cmd(node, cmd)
            except AssertionError:
                if fail_on_error:
                    raise

    @staticmethod
    def get_hoststack_test_program_logs(node, program):
        """Get HostStack test program stdout log.

        :param node: DUT node.
        :param program: test program.
        :type node: dict
        :type program: dict
        """
        program_name = program[u"name"]
        cmd = f"sh -c \'cat /tmp/{program_name}_stdout.log\'"
        stdout_log, _ = exec_cmd_no_error(node, cmd, sudo=True, \
            message=f"Get {program_name} stdout log failed!")

        cmd = f"sh -c \'cat /tmp/{program_name}_stderr.log\'"
        stderr_log, _ = exec_cmd_no_error(node, cmd, sudo=True, \
            message=f"Get {program_name} stderr log failed!")
        return stdout_log, stderr_log

    @staticmethod
    def start_hoststack_test_program(node, namespace, program):
        """Start the specified HostStack test program.

        :param node: DUT node.
        :param namespace: Net Namespace to run program in.
        :param program: Test program.
        :type node: dict
        :type namespace: str
        :type program: dict
        :returns: Process ID
        :rtype: int
        :raises RuntimeError: If node subtype is not a DUT or startup failed.
        """
        # TODO: Pin test program to core(s) on same numa node as VPP.
        if node[u"type"] != u"DUT":
            raise RuntimeError(u"Node type is not a DUT!")

        program_name = program[u"name"]
        DUTSetup.kill_program(node, program_name, namespace)

        if namespace == u"default":
            shell_cmd = u"sh -c"
        else:
            shell_cmd = f"ip netns exec {namespace} sh -c"

        env_vars = f"{program[u'env_vars']} " if u"env_vars" in program else u""
        args = program[u"args"]
        cmd = f"nohup {shell_cmd} \'{env_vars}{program_name} {args} " \
            f">/tmp/{program_name}_stdout.log " \
            f"2>/tmp/{program_name}_stderr.log &\'"
        try:
            exec_cmd_no_error(node, cmd, sudo=True)
            return DUTSetup.get_pid(node, program_name)[0]
        except RuntimeError:
            stdout_log, stderr_log = \
                HoststackUtil.get_hoststack_test_program_logs(node,
                                                              program)
            raise RuntimeError(f"Start {program_name} failed!\nSTDERR:\n" \
                               f"{stderr_log}\nSTDOUT:\n{stdout_log}")
        return None

    @staticmethod
    def stop_hoststack_test_program(node, program, pid):
        """Stop the specified Hoststack test program.

        :param node: DUT node.
        :param program: Test program.
        :param pid: Process ID of test program.
        :type node: dict
        :type program: dict
        :type pid: int
        """
        program_name = program[u"name"]
        if program_name == u"nginx":
            cmd = u"nginx -s quit"
            errmsg = u"Quit nginx failed!"
        else:
            cmd = f'if [ -n "$(ps {pid} | grep {program_name})" ] ; ' \
                f'then kill -s SIGTERM {pid}; fi'
            errmsg = f"Kill {program_name} ({pid}) failed!"

        exec_cmd_no_error(node, cmd, message=errmsg, sudo=True)

    @staticmethod
    def hoststack_test_program_finished(node, program_pid):
        """Wait for the specified HostStack test program process to complete.

        :param node: DUT node.
        :param program_pid: test program pid.
        :type node: dict
        :type program_pid: str
        :raises RuntimeError: If node subtype is not a DUT.
        """
        if node[u"type"] != u"DUT":
            raise RuntimeError(u"Node type is not a DUT!")

        cmd = f"sh -c 'strace -qqe trace=none -p {program_pid}'"
        exec_cmd(node, cmd, sudo=True)
        # Wait a bit for stdout/stderr to be flushed to log files
        # TODO: see if sub-second sleep works e.g. sleep(0.1)
        sleep(1)

    @staticmethod
    def analyze_hoststack_test_program_output(node, role, nsim_attr,
                                              program):
        """Gather HostStack test program output and check for errors.

        :param node: DUT node.
        :param role: Role (client|server) of test program.
        :param nsim_attr: Network Simulation Attributes.
        :param program: Test program.
        :param program_args: List of test program args.
        :type node: dict
        :type role: str
        :type nsim_attr: dict
        :type program: dict
        :returns: tuple of no results bool and test program results.
        :rtype: bool, str
        :raises RuntimeError: If node subtype is not a DUT.
        """
        if node[u"type"] != u"DUT":
            raise RuntimeError(u"Node type is not a DUT!")

        program_name = program[u"name"]
        program_stdout, program_stderr = \
            HoststackUtil.get_hoststack_test_program_logs(node, program)
        if len(program_stdout) == 0 and len(program_stderr) == 0:
            logger.trace(f"Retrying {program_name} log retrieval")
            program_stdout, program_stderr = \
               HoststackUtil.get_hoststack_test_program_logs(node, program)

        no_results = False
        env_vars = f"{program[u'env_vars']} " if u"env_vars" in program else u""
        program_cmd = f"{env_vars}{program_name} {program[u'args']}"
        test_results = f"Test Results of '{program_cmd}':\n"

        if nsim_attr[u"output_feature_enable"] or \
            nsim_attr[u"cross_connect_feature_enable"]:
            if nsim_attr[u"output_feature_enable"]:
                feature_name = u"output"
            else:
                feature_name = u"cross-connect"
            test_results += \
                f"NSIM({feature_name}): delay " \
                f"{nsim_attr[u'delay_in_usec']} usecs, " \
                f"avg-pkt-size {nsim_attr[u'average_packet_size']}, " \
                f"bandwidth {nsim_attr[u'bandwidth_in_bits_per_second']} " \
                f"bits/sec, pkt-drop-rate {nsim_attr[u'packets_per_drop']} " \
                f"pkts/drop\n"

        if u"error" in program_stderr.lower():
            test_results += f"ERROR DETECTED:\n{program_stderr}"
            raise RuntimeError(test_results)
        if program_stdout:
            bad_test_results = False
            if program == u"vpp_echo" and u"JSON stats" not in program_stdout:
                test_results += u"Invalid test data output!\n"
                bad_test_results = True
            test_results += program_stdout
            if bad_test_results:
                raise RuntimeError(test_results)
        else:
            no_results = True
            test_results += f"\nNo {program} test data retrieved!\n"
            cmd = u"ls -l /tmp/*.log"
            ls_stdout, _ = exec_cmd_no_error(node, cmd, sudo=True)
            test_results += f"{ls_stdout}\n"

        # TODO: Incorporate show error stats into results analysis
        host = node[u"host"]
        test_results += \
            f"\n{role} VPP 'show errors' on host {host}:\n" \
            f"{PapiSocketExecutor.run_cli_cmd(node, u'show error')}\n"

        return no_results, test_results

    @staticmethod
    def no_hoststack_test_program_results(server_no_results, client_no_results):
        """Return True if no HostStack test program output was gathered.

        :param server_no_results: server no results value.
        :param client_no_results: client no results value.
        :type server_no_results: bool
        :type client_no_results: bool
        :rtype: bool
        """
        return server_no_results and client_no_results