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How to use _kdump_test method in lisa

Best Python code snippet using lisa_python
kdumpcrash.py
Source:kdumpcrash.py
...81    )82    def kdumpcrash_validate_single_core(83        self, node: Node, log_path: Path, log: Logger84    ) -> None:85        self._kdump_test(node, log_path, log)86    @TestCaseMetadata(87        description="""88        This test case verifies if the kdump is effect when VM has 2~8 cpus, and89        trigger kdump on the second cpu(cpu1), which is designed by a known issue.90        The test steps are same as `kdumpcrash_validate_single_core`.91        """,92        priority=2,93        requirement=node_requirement(94            node=schema.NodeSpace(95                core_count=search_space.IntRange(min=2, max=8),96            )97        ),98    )99    def kdumpcrash_validate_smp(self, node: Node, log_path: Path, log: Logger) -> None:100        self._trigger_kdump_on_specified_cpu(1, node, log_path, log)101    @TestCaseMetadata(102        description="""103        This test case verifies if the kdump is effect when VM has any cores, and104        trigger kdump on the random cpu.105        The test steps are same as `kdumpcrash_validate_single_core`.106        """,107        priority=2,108    )109    def kdumpcrash_validate_on_random_cpu(110        self, node: Node, log_path: Path, log: Logger111    ) -> None:112        lscpu = node.tools[Lscpu]113        cpu_count = lscpu.get_core_count()114        cpu_num = randint(0, cpu_count - 1)115        self._trigger_kdump_on_specified_cpu(cpu_num, node, log_path, log)116    @TestCaseMetadata(117        description="""118        This test case verifies if the kdump is effect when VM has 33~192 cpus and119        trigger kdump on the 33th cpu(cpu32), which is designed by a known issue.120        The test steps are same as `kdumpcrash_validate_single_core`.121        """,122        priority=2,123        requirement=node_requirement(124            node=schema.NodeSpace(core_count=search_space.IntRange(min=33, max=192))125        ),126    )127    def kdumpcrash_validate_on_cpu32(128        self, node: Node, log_path: Path, log: Logger129    ) -> None:130        self._trigger_kdump_on_specified_cpu(32, node, log_path, log)131    @TestCaseMetadata(132        description="""133        This test case verifies if the kdump is effect when VM has 193~415 cpus, and134        trigger kdump on the 193th cpu(cpu192), which is designed by a known issue.135        The test steps are same as `kdumpcrash_validate_single_core`.136        """,137        priority=2,138        requirement=node_requirement(139            node=schema.NodeSpace(core_count=search_space.IntRange(min=193, max=415))140        ),141    )142    def kdumpcrash_validate_on_cpu192(143        self, node: Node, log_path: Path, log: Logger144    ) -> None:145        self._trigger_kdump_on_specified_cpu(192, node, log_path, log)146    @TestCaseMetadata(147        description="""148        This test case verifies if the kdump is effect when VM has more than 415 cpus,149        and trigger kdump on the 416th cpu(cpu415), which is designed by a known issue.150        The test steps are same as `kdumpcrash_validate_single_core`.151        """,152        priority=2,153        requirement=node_requirement(154            node=schema.NodeSpace(core_count=search_space.IntRange(min=416))155        ),156    )157    def kdumpcrash_validate_on_cpu415(158        self, node: Node, log_path: Path, log: Logger159    ) -> None:160        self._trigger_kdump_on_specified_cpu(415, node, log_path, log)161    @TestCaseMetadata(162        description="""163        This test case verifies if the kdump is effect when crashkernel is set auto.164        The test steps are same as `kdumpcrash_validate_single_core`.165        """,166        priority=2,167    )168    def kdumpcrash_validate_auto_size(169        self, node: Node, log_path: Path, log: Logger170    ) -> None:171        self.crash_kernel = "auto"172        self._kdump_test(node, log_path, log)173    @TestCaseMetadata(174        description="""175        This test case verifies if the kdump is effect when crashkernel is set auto and176        the memory is more than 2T. With the crashkernel=auto parameter, system will177        reserved a suitable size memory for crash kernel. We want to see if the178        crashkernel=auto can also handle this scenario when the system memory is large.179        The test steps are same as `kdumpcrash_validate_single_core`.180        """,181        priority=2,182        requirement=node_requirement(183            node=schema.NodeSpace(memory_mb=search_space.IntRange(min=2097152)),184        ),185    )186    def kdumpcrash_validate_large_memory_auto_size(187        self, node: Node, log_path: Path, log: Logger188    ) -> None:189        self.crash_kernel = "auto"190        self._kdump_test(node, log_path, log)191    def _check_supported(self, node: Node) -> None:192        # Check the kernel config for kdump supported193        kdump = node.tools[KdumpBase]194        kdump.check_required_kernel_config()195        # Check the VMBus version for kdump supported196        dmesg = node.tools[Dmesg]197        vmbus_version = dmesg.get_vmbus_version()198        if vmbus_version < "3.0.0":199            raise SkippedException(200                f"No negotiated VMBus version {vmbus_version}. "201                "Kernel might be old or patches not included. "202                "Full support for kdump is not present."203            )204        # Below code aims to check the kernel config for "auto crashkernel" supported.205        # Redhat/Centos has this "auto crashkernel" feature. For version 7, it needs the206        # CONFIG_KEXEC_AUTO_RESERVE. For version 8, the ifdefine of that config is207        # removed. For these changes we can refer to Centos kernel, gotten according208        # to https://wiki.centos.org/action/show/Sources?action=show&redirect=sources209        # In addition, we didn't see upstream kernel has the auto crashkernel feature.210        # It may be a patch owned by Redhat/Centos.211        # Note that crashkernel=auto option in the boot command line is no longer212        # supported on RHEL 9 and later releases213        if not (214            isinstance(node.os, Redhat)215            and node.os.information.version >= "8.0.0-0"216            and node.os.information.version < "9.0.0-0"217        ):218            if self.crash_kernel == "auto" and not node.tools[KernelConfig].is_built_in(219                "CONFIG_KEXEC_AUTO_RESERVE"220            ):221                raise SkippedException("crashkernel=auto doesn't work for the distro.")222    def _get_resource_disk_dump_path(self, node: Node) -> str:223        if node.shell.exists(224            PurePosixPath("/var/log/cloud-init.log")225        ) and node.shell.exists(PurePosixPath("/var/lib/cloud/instance")):226            mount_point = "/mnt"227        else:228            mount_point = node.tools[Waagent].get_resource_disk_mount_point()229        dump_path = mount_point + "/crash"230        node.execute(231            f"mkdir -p {dump_path}",232            expected_exit_code=0,233            expected_exit_code_failure_message=(f"Fail to create dir {dump_path}"),234            shell=True,235            sudo=True,236        )237        return dump_path238    def _kdump_test(self, node: Node, log_path: Path, log: Logger) -> None:239        try:240            self._check_supported(node)241        except UnsupportedDistroException as identifier:242            raise SkippedException(identifier)243        kdump = node.tools[KdumpBase]244        free = node.tools[Free]245        total_memory = free.get_total_memory()246        if "T" in total_memory and float(total_memory.strip("T")) > 1:247            # System memory is more than 1T, need to change the dump path248            # and set crashkernel=2G249            kdump.config_resource_disk_dump_path(250                self._get_resource_disk_dump_path(node)251            )252            self.crash_kernel = "2G"253            self.timeout_of_dump_crash = 1200254            if float(total_memory.strip("T")) > 6:255                self.timeout_of_dump_crash = 2000256        kdump.config_crashkernel_memory(self.crash_kernel)257        kdump.enable_kdump_service()258        # Cleaning up any previous crash dump files259        node.execute(260            f"mkdir -p {kdump.dump_path} && rm -rf {kdump.dump_path}/*",261            shell=True,262            sudo=True,263        )264        # Reboot system to make kdump take effect265        node.reboot()266        # Confirm that the kernel dump mechanism is enabled267        kdump.check_crashkernel_loaded(self.crash_kernel)268        # Activate the magic SysRq option269        echo = node.tools[Echo]270        echo.write_to_file("1", node.get_pure_path("/proc/sys/kernel/sysrq"), sudo=True)271        node.execute("sync", shell=True, sudo=True)272        try:273            # Trigger kdump. After execute the trigger cmd, the VM will be disconnected274            # We set a timeout time 10.275            node.execute(276                self.trigger_kdump_cmd,277                shell=True,278                sudo=True,279                timeout=10,280            )281        except Exception as identifier:282            log.debug(f"ignorable ssh exception: {identifier}")283        # Check if the vmcore file is generated after triggering a crash284        self._check_kdump_result(node, log_path, log, kdump)285        # We should clean up the vmcore file since the test is passed286        node.execute(f"rm -rf {kdump.dump_path}/*", shell=True, sudo=True)287    def _check_kdump_result(288        self, node: Node, log_path: Path, log: Logger, kdump: KdumpBase289    ) -> None:290        # We use this function to check if the dump file is generated.291        # Steps:292        # 1. Try to connect the VM;293        # 2. If connected:294        #    1). Check if the dump file is generated. If so, then jump the loop.295        #       The test is passed.296        #    2). If there is no dump file, check the incomplete file (When dumping297        #        hasn't completed, the dump file is named as "*incomplete").298        #           a. If there is no incomplete file either, then raise and exception.299        #           b. If there is an incomplete file, then check if the file size300        #              is growing. If so, check it in a loop until the dump completes301        #              or incomplete file doesn't grow or timeout.302        # 3. The VM can be connected may just when the crash kernel boots up. When303        #    dumping or rebooting after dump completes, the VM might be disconnected.304        #    We need to catch the exception, and retry to connect the VM. Then follow305        #    the same steps to check.306        timer = create_timer()307        remote_node = cast(RemoteNode, node)308        system_disconnected = True309        serial_console = node.features[SerialConsole]310        while system_disconnected and timer.elapsed(False) < self.timeout_of_dump_crash:311            try:312                try_connect(remote_node._connection_info)313            except Exception as identifier:314                log.debug(315                    "Fail to connect SSH "316                    f"{remote_node._connection_info.address}:"317                    f"{remote_node._connection_info.port}. "318                    f"{identifier.__class__.__name__}: {identifier}. Retry..."319                )320                serial_console.check_initramfs(321                    saved_path=log_path, stage="after_trigger_crash", force_run=True322                )323                system_disconnected = True324                continue325            # If there is no exception, then the system is connected326            system_disconnected = False327            # After trigger kdump, the VM will reboot. We need to close the node328            node.close()329            saved_dumpfile_size = 0330            max_retries = 10331            retries = 0332            # Check in this loop until the dump file is generated or incomplete file333            # doesn't grow or timeout334            while True:335                try:336                    # The exit code of this command is always 0. Check the stdout337                    result = node.execute(338                        f"find {kdump.dump_path} -type f -size +10M "339                        "\\( -name vmcore -o -name dump.* -o -name vmcore.* \\) "340                        "-exec ls -lh {} \\;",341                        shell=True,342                        sudo=True,343                    )344                    if result.stdout:345                        break346                    # Check if has dump incomplete file347                    result = node.execute(348                        f"find {kdump.dump_path} -name '*incomplete*'",349                        shell=True,350                        sudo=True,351                    )352                    if result.stdout:353                        incomplete_file = result.stdout354                        stat = node.tools[Stat]355                        incomplete_file_size = stat.get_total_size(incomplete_file)356                except Exception as identifier:357                    log.debug(358                        "Fail to execute command. It may be caused by the system kernel"359                        " reboot after dumping vmcore."360                        f"{identifier.__class__.__name__}: {identifier}. Retry..."361                    )362                    system_disconnected = True363                    break364                if result.stdout:365                    if incomplete_file_size > saved_dumpfile_size:366                        saved_dumpfile_size = incomplete_file_size367                        retries = 0368                    else:369                        retries = retries + 1370                        if retries >= max_retries:371                            raise LisaException(372                                "The vmcore file is incomplete with file size"373                                f" {round(incomplete_file_size/1024/1024, 2)}MB"374                            )375                else:376                    retries = retries + 1377                    if retries >= max_retries:378                        raise LisaException(379                            "No vmcore or vmcore-incomplete is found under "380                            f"{kdump.dump_path} with file size greater than 10M."381                        )382                if timer.elapsed(False) > self.timeout_of_dump_crash:383                    raise LisaException(384                        "Timeout to dump vmcore file. The size of vmcore-incomplete is"385                        f" {round(incomplete_file_size/1024/1024, 2)}MB"386                    )387                time.sleep(5)388        if system_disconnected:389            raise LisaException("Timeout to connect the VM after triggering kdump.")390    def _trigger_kdump_on_specified_cpu(391        self, cpu_num: int, node: Node, log_path: Path, log: Logger392    ) -> None:393        lscpu = node.tools[Lscpu]394        cpu_count = lscpu.get_core_count()395        if cpu_count > cpu_num:396            self.trigger_kdump_cmd = (397                f"taskset -c {cpu_num} echo c > /proc/sysrq-trigger"398            )399            self._kdump_test(node, log_path, log)400        else:401            raise SkippedException(402                "The cpu count can't meet the test case's requirement. "403                f"Expected more than {cpu_num} cpus, actual {cpu_count}"...
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