X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=resources%2Flibraries%2Fpython%2FQemuUtils.py;h=74965ec580511094c12f99f8a7dd06c598414e93;hp=16ade2916768cb2f4b78b79693b0ef7a12af7b3a;hb=22417d56aa83eaced43c4ef4473e38a34fdb4dfa;hpb=223017fbe03ab4f8f49c134b9e88ecb55168a180 diff --git a/resources/libraries/python/QemuUtils.py b/resources/libraries/python/QemuUtils.py index 16ade29167..74965ec580 100644 --- a/resources/libraries/python/QemuUtils.py +++ b/resources/libraries/python/QemuUtils.py @@ -1,4 +1,4 @@ -# Copyright (c) 2016 Cisco and/or its affiliates. +# Copyright (c) 2019 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: @@ -15,139 +15,195 @@ from time import time, sleep import json -import re +from re import match +# Disable due to pylint bug +# pylint: disable=no-name-in-module,import-error +from distutils.version import StrictVersion from robot.api import logger +from resources.libraries.python.ssh import exec_cmd, exec_cmd_no_error +from resources.libraries.python.Constants import Constants +from resources.libraries.python.DUTSetup import DUTSetup +from resources.libraries.python.topology import NodeType, Topology -from resources.libraries.python.ssh import SSH -from resources.libraries.python.constants import Constants -from resources.libraries.python.topology import NodeType +__all__ = ["QemuOptions", "QemuUtils"] -class QemuUtils(object): - """QEMU utilities.""" +class QemuOptions(object): + """QEMU option class. + + The class can handle input parameters or parameters that acts as QEMU + command line parameters. The only variable is a list of dictionaries + where dictionaries can be added multiple times. This emulates the QEMU + behavior where one command line parameter can be used multiple times (1..N). + Example can be device or object (so it is not an issue to have one memory + block of 2G and and second memory block of 512M but from other numa). - __QEMU_BIN = '/opt/qemu/bin/qemu-system-x86_64' - # QEMU Machine Protocol socket - __QMP_SOCK = '/tmp/qmp.sock' - # QEMU Guest Agent socket - __QGA_SOCK = '/tmp/qga.sock' + Class does support get value or string representation that will return + space separated, dash prefixed string of key value pairs used for command + line. + """ + + # Use one instance of class per tests. + ROBOT_LIBRARY_SCOPE = 'TEST CASE' def __init__(self): - self._qemu_opt = {} - # Default 1 CPU. - self._qemu_opt['smp'] = '-smp 1,sockets=1,cores=1,threads=1' - # Daemonize the QEMU process after initialization. Default one - # management interface. - self._qemu_opt['options'] = '-cpu host -daemonize -enable-kvm ' \ - '-machine pc-1.0,accel=kvm,usb=off,mem-merge=off ' \ - '-net nic,macaddr=52:54:00:00:02:01 -balloon none' - self._qemu_opt['ssh_fwd_port'] = 10022 - # Default serial console port - self._qemu_opt['serial_port'] = 4556 - # Default 512MB virtual RAM - self._qemu_opt['mem_size'] = 512 - # Default huge page mount point, required for Vhost-user interfaces. - self._qemu_opt['huge_mnt'] = '/mnt/huge' - # Default do not allocate huge pages. - self._qemu_opt['huge_allocate'] = False - # Default image for CSIT virl setup - self._qemu_opt['disk_image'] = '/var/lib/vm/vhost-nested.img' - # VM node info dict - self._vm_info = { - 'type': NodeType.VM, - 'port': 10022, - 'username': 'cisco', - 'password': 'cisco', - 'interfaces': {}, - } - self._vhost_id = 0 - self._ssh = None - self._node = None - self._socks = [self.__QMP_SOCK, self.__QGA_SOCK] - - def qemu_set_smp(self, cpus, cores, threads, sockets): - """Set SMP option for QEMU - - :param cpus: Number of CPUs. - :param cores: Number of CPU cores on one socket. - :param threads: Number of threads on one CPU core. - :param sockets: Number of discrete sockets in the system. - :type cpus: int - :type cores: int - :type threads: int - :type sockets: int - """ - self._qemu_opt['smp'] = '-smp {},cores={},threads={},sockets={}'.format( - cpus, cores, threads, sockets) + self.variables = list() - def qemu_set_ssh_fwd_port(self, fwd_port): - """Set host port for guest SSH forwarding. + def add(self, variable, value): + """Add parameter to the list. - :param fwd_port: Port number on host for guest SSH forwarding. - :type fwd_port: int + :param variable: QEMU parameter. + :param value: Parameter value. + :type variable: str + :type value: str or int """ - self._qemu_opt['ssh_fwd_port'] = fwd_port - self._vm_info['port'] = fwd_port + self.variables.append({str(variable): value}) - def qemu_set_serial_port(self, port): - """Set serial console port. + def get(self, variable): + """Get parameter of variable(s) from list that matches input value. - :param port: Serial console port. - :type port: int + :param variable: QEMU parameter to get. + :type variable: str + :returns: List of values or value that matches input parameter. + :rtype: list or str """ - self._qemu_opt['serial_port'] = port + selected = [d[variable] for d in self.variables if variable in d] + return selected if len(selected) > 1 else selected[0] - def qemu_set_mem_size(self, mem_size): - """Set virtual RAM size. + def get_values(self): + """Get all values from dict items in list. - :param mem_size: RAM size in Mega Bytes. - :type mem_size: int + :returns: List of all dictionary values. + :rtype: list """ - self._qemu_opt['mem_size'] = int(mem_size) + return [d.values()[0] for d in self.variables] - def qemu_set_huge_mnt(self, huge_mnt): - """Set hugefile mount point. + def __str__(self): + """Return space separated string of key value pairs. - :param huge_mnt: System hugefile mount point. - :type huge_mnt: int + :returns: Space separated string of key value pairs. + :rtype: str """ - self._qemu_opt['huge_mnt'] = huge_mnt + return " ".join(["-{k} {v}".format(k=d.keys()[0], v=d.values()[0]) + for d in self.variables]) - def qemu_set_huge_allocate(self): - """Set flag to allocate more huge pages if needed.""" - self._qemu_opt['huge_allocate'] = True - - def qemu_set_disk_image(self, disk_image): - """Set disk image. +class QemuUtils(object): + """QEMU utilities.""" - :param disk_image: Path of the disk image. - :type disk_image: str - """ - self._qemu_opt['disk_image'] = disk_image + # Use one instance of class per tests. + ROBOT_LIBRARY_SCOPE = 'TEST CASE' - def qemu_set_affinity(self, *host_cpus): - """Set qemu affinity by getting thread PIDs via QMP and taskset to list - of CPU cores. + def __init__(self, node=None, qemu_id=1, smp=1, mem=512, vnf=None, + img='/var/lib/vm/vhost-nested.img', bin_path='/usr/bin'): + """Initialize QemuUtil class. - :param host_cpus: List of CPU cores. - :type host_cpus: list + :param node: Node to run QEMU on. + :param qemu_id: QEMU identifier. + :param smp: Number of virtual SMP units (cores). + :param mem: Amount of memory. + :param vnf: Network function workload. + :param img: QEMU disk image or kernel image path. + :param bin_path: QEMU binary path. + :type node: dict + :type qemu_id: int + :type smp: int + :type mem: int + :type vnf: str + :type img: str + :type bin_path: str """ - qemu_cpus = self._qemu_qmp_exec('query-cpus')['return'] - - if len(qemu_cpus) != len(host_cpus): - logger.debug('Host CPU count {0}, Qemu Thread count {1}'.format( - len(host_cpus), len(qemu_cpus))) - raise ValueError('Host CPU count must match Qemu Thread count') - - for qemu_cpu, host_cpu in zip(qemu_cpus, host_cpus): - cmd = 'taskset -p {0} {1}'.format(hex(1 << int(host_cpu)), - qemu_cpu['thread_id']) - (ret_code, _, stderr) = self._ssh.exec_command_sudo(cmd) - if int(ret_code) != 0: - logger.debug('Set affinity failed {0}'.format(stderr)) - raise RuntimeError('Set affinity failed on {0}'.format( - self._node['host'])) + self._vhost_id = 0 + self._vm_info = { + 'type': NodeType.VM, + 'port': 10021 + qemu_id, + 'serial': 4555 + qemu_id, + 'username': 'cisco', + 'password': 'cisco', + 'interfaces': {}, + } + if node: + self.qemu_set_node(node) + # Input Options. + self._opt = QemuOptions() + self._opt.add('qemu_id', qemu_id) + self._opt.add('bin_path', bin_path) + self._opt.add('mem', int(mem)) + self._opt.add('smp', int(smp)) + self._opt.add('img', img) + self._opt.add('vnf', vnf) + # Temporary files. + self._temp = QemuOptions() + self._temp.add('pid', '/var/run/qemu_{id}.pid'.format(id=qemu_id)) + # Computed parameters for QEMU command line. + if '/var/lib/vm/' in img: + self._opt.add('vm_type', 'nestedvm') + self._temp.add('qmp', '/var/run/qmp_{id}.sock'.format(id=qemu_id)) + self._temp.add('qga', '/var/run/qga_{id}.sock'.format(id=qemu_id)) + else: + raise RuntimeError('QEMU: Unknown VM image option!') + self._params = QemuOptions() + self.add_params() + + def add_params(self): + """Set QEMU command line parameters.""" + self.add_default_params() + if self._opt.get('vm_type') == 'nestedvm': + self.add_nestedvm_params() + else: + raise RuntimeError('QEMU: Unsupported VM type!') + + def add_default_params(self): + """Set default QEMU command line parameters.""" + self._params.add('daemonize', '') + self._params.add('nodefaults', '') + self._params.add('name', 'vnf{qemu},debug-threads=on'. + format(qemu=self._opt.get('qemu_id'))) + self._params.add('no-user-config', '') + self._params.add('monitor', 'none') + self._params.add('display', 'none') + self._params.add('vga', 'none') + self._params.add('enable-kvm', '') + self._params.add('pidfile', '{pid}'. + format(pid=self._temp.get('pid'))) + self._params.add('cpu', 'host') + self._params.add('machine', 'pc,accel=kvm,usb=off,mem-merge=off') + self._params.add('smp', '{smp},sockets=1,cores={smp},threads=1'. + format(smp=self._opt.get('smp'))) + self._params.add('object', + 'memory-backend-file,id=mem,size={mem}M,' + 'mem-path=/mnt/huge,share=on'. + format(mem=self._opt.get('mem'))) + self._params.add('m', '{mem}M'. + format(mem=self._opt.get('mem'))) + self._params.add('numa', 'node,memdev=mem') + self._params.add('balloon', 'none') + + def add_nestedvm_params(self): + """Set NestedVM QEMU parameters.""" + self._params.add('net', 'nic,macaddr=52:54:00:00:{qemu:02x}:ff'. + format(qemu=self._opt.get('qemu_id'))) + self._params.add('net', 'user,hostfwd=tcp::{info[port]}-:22'. + format(info=self._vm_info)) + # TODO: Remove try except after fully migrated to Bionic or + # qemu_set_node is removed. + try: + locking = ',file.locking=off'\ + if self.qemu_version(version='2.10') else '' + except AttributeError: + locking = '' + self._params.add('drive', + 'file={img},format=raw,cache=none,if=virtio{locking}'. + format(img=self._opt.get('img'), locking=locking)) + self._params.add('qmp', 'unix:{qmp},server,nowait'. + format(qmp=self._temp.get('qmp'))) + self._params.add('chardev', 'socket,host=127.0.0.1,port={info[serial]},' + 'id=gnc0,server,nowait'.format(info=self._vm_info)) + self._params.add('device', 'isa-serial,chardev=gnc0') + self._params.add('chardev', + 'socket,path={qga},server,nowait,id=qga0'. + format(qga=self._temp.get('qga'))) + self._params.add('device', 'isa-serial,chardev=qga0') def qemu_set_node(self, node): """Set node to run QEMU on. @@ -156,48 +212,114 @@ class QemuUtils(object): :type node: dict """ self._node = node - self._ssh = SSH() - self._ssh.connect(node) self._vm_info['host'] = node['host'] + if node['port'] != 22: + self._vm_info['host_port'] = node['port'] + self._vm_info['host_username'] = node['username'] + self._vm_info['host_password'] = node['password'] + + def get_qemu_pids(self): + """Get QEMU CPU pids. + + :returns: List of QEMU CPU pids. + :rtype: list of str + """ + command = ("grep -rwl 'CPU' /proc/$(sudo cat {pid})/task/*/comm ". + format(pid=self._temp.get('pid'))) + command += (r"| xargs dirname | sed -e 's/\/.*\///g'") + + stdout, _ = exec_cmd_no_error(self._node, command) + return stdout.splitlines() - def qemu_add_vhost_user_if(self, socket, server=True, mac=None): + def qemu_set_affinity(self, *host_cpus): + """Set qemu affinity by getting thread PIDs via QMP and taskset to list + of CPU cores. + + :param host_cpus: List of CPU cores. + :type host_cpus: list + """ + try: + qemu_cpus = self.get_qemu_pids() + + if len(qemu_cpus) != len(host_cpus): + raise ValueError('Host CPU count must match Qemu Thread count!') + + for qemu_cpu, host_cpu in zip(qemu_cpus, host_cpus): + command = ('taskset -pc {host_cpu} {thread}'. + format(host_cpu=host_cpu, thread=qemu_cpu)) + message = ('QEMU: Set affinity failed on {host}!'. + format(host=self._node['host'])) + exec_cmd_no_error(self._node, command, sudo=True, + message=message) + except (RuntimeError, ValueError): + self.qemu_kill_all() + raise + + def qemu_set_scheduler_policy(self): + """Set scheduler policy to SCHED_RR with priority 1 for all Qemu CPU + processes. + + :raises RuntimeError: Set scheduler policy failed. + """ + try: + qemu_cpus = self.get_qemu_pids() + + for qemu_cpu in qemu_cpus: + command = ('chrt -r -p 1 {thread}'. + format(thread=qemu_cpu)) + message = ('QEMU: Set SCHED_RR failed on {host}'. + format(host=self._node['host'])) + exec_cmd_no_error(self._node, command, sudo=True, + message=message) + except (RuntimeError, ValueError): + self.qemu_kill_all() + raise + + def qemu_add_vhost_user_if(self, socket, server=True, jumbo_frames=False, + queue_size=None, queues=1): """Add Vhost-user interface. :param socket: Path of the unix socket. :param server: If True the socket shall be a listening socket. - :param mac: Vhost-user interface MAC address (optional, otherwise is - used autogenerated MAC 52:54:00:00:04:xx). + :param jumbo_frames: Set True if jumbo frames are used in the test. + :param queue_size: Vring queue size. + :param queues: Number of queues. :type socket: str :type server: bool - :type mac: str + :type jumbo_frames: bool + :type queue_size: int + :type queues: int """ self._vhost_id += 1 - # Create unix socket character device. - chardev = ' -chardev socket,id=char{0},path={1}'.format(self._vhost_id, - socket) - if server is True: - chardev += ',server' - self._qemu_opt['options'] += chardev - # Create Vhost-user network backend. - netdev = ' -netdev vhost-user,id=vhost{0},chardev=char{0}'.format( - self._vhost_id) - self._qemu_opt['options'] += netdev - # If MAC is not specified use autogenerated 52:54:00:00:04: - # e.g. vhost1 MAC is 52:54:00:00:04:01 - if mac is None: - mac = '52:54:00:00:04:{0:02x}'.format(self._vhost_id) - extend_options = 'csum=off,gso=off,guest_tso4=off,guest_tso6=off,'\ - 'guest_ecn=off,mrg_rxbuf=off' - # Create Virtio network device. - device = ' -device virtio-net-pci,netdev=vhost{0},mac={1},{2}'.format( - self._vhost_id, mac, extend_options) - self._qemu_opt['options'] += device - # Add interface MAC and socket to the node dict + self._params.add('chardev', + 'socket,id=char{vhost},path={socket}{server}'. + format(vhost=self._vhost_id, socket=socket, + server=',server' if server is True else '')) + self._params.add('netdev', + 'vhost-user,id=vhost{vhost},' + 'chardev=char{vhost},queues={queues}'. + format(vhost=self._vhost_id, queues=queues)) + mac = ('52:54:00:00:{qemu:02x}:{vhost:02x}'. + format(qemu=self._opt.get('qemu_id'), vhost=self._vhost_id)) + queue_size = ('rx_queue_size={queue_size},tx_queue_size={queue_size}'. + format(queue_size=queue_size)) if queue_size else '' + mbuf = 'on,host_mtu=9200' + self._params.add('device', + 'virtio-net-pci,netdev=vhost{vhost},' + 'mac={mac},mq=on,vectors={vectors},csum=off,gso=off,' + 'guest_tso4=off,guest_tso6=off,guest_ecn=off,' + 'mrg_rxbuf={mbuf},{queue_size}'. + format(vhost=self._vhost_id, mac=mac, + mbuf=mbuf if jumbo_frames else 'off', + queue_size=queue_size, + vectors=(2 * queues + 2))) + + # Add interface MAC and socket to the node dict. if_data = {'mac_address': mac, 'socket': socket} - if_name = 'vhost{}'.format(self._vhost_id) + if_name = 'vhost{vhost}'.format(vhost=self._vhost_id) self._vm_info['interfaces'][if_name] = if_data - # Add socket to the socket list - self._socks.append(socket) + # Add socket to temporary file list. + self._temp.add(if_name, socket) def _qemu_qmp_exec(self, cmd): """Execute QMP command. @@ -206,41 +328,37 @@ class QemuUtils(object): :param cmd: QMP command to execute. :type cmd: str - :return: Command output in python representation of JSON format. The + :returns: Command output in python representation of JSON format. The { "return": {} } response is QMP's success response. An error response will contain the "error" keyword instead of "return". """ # To enter command mode, the qmp_capabilities command must be issued. - qmp_cmd = 'echo "{ \\"execute\\": \\"qmp_capabilities\\" }' + \ - '{ \\"execute\\": \\"' + cmd + '\\" }" | sudo -S nc -U ' + \ - self.__QMP_SOCK - (ret_code, stdout, stderr) = self._ssh.exec_command(qmp_cmd) - if 0 != int(ret_code): - logger.debug('QMP execute failed {0}'.format(stderr)) - raise RuntimeError('QMP execute "{0}" failed on {1}'.format(cmd, - self._node['host'])) - logger.trace(stdout) + command = ('echo "{{ \\"execute\\": \\"qmp_capabilities\\" }}' + '{{ \\"execute\\": \\"{cmd}\\" }}" | ' + 'sudo -S socat - UNIX-CONNECT:{qmp}'. + format(cmd=cmd, qmp=self._temp.get('qmp'))) + message = ('QMP execute "{cmd}" failed on {host}'. + format(cmd=cmd, host=self._node['host'])) + stdout, _ = exec_cmd_no_error(self._node, command, sudo=False, + message=message) + # Skip capabilities negotiation messages. out_list = stdout.splitlines() if len(out_list) < 3: - raise RuntimeError('Invalid QMP output on {0}'.format( - self._node['host'])) + raise RuntimeError('Invalid QMP output on {host}'. + format(host=self._node['host'])) return json.loads(out_list[2]) def _qemu_qga_flush(self): - """Flush the QGA parser state - """ - qga_cmd = 'printf "\xFF" | sudo -S nc ' \ - '-q 1 -U ' + self.__QGA_SOCK - (ret_code, stdout, stderr) = self._ssh.exec_command(qga_cmd) - if 0 != int(ret_code): - logger.debug('QGA execute failed {0}'.format(stderr)) - raise RuntimeError('QGA execute "{0}" failed on {1}'.format(cmd, - self._node['host'])) - logger.trace(stdout) - if not stdout: - return {} - return json.loads(stdout.split('\n', 1)[0]) + """Flush the QGA parser state.""" + command = ('(printf "\xFF"; sleep 1) | ' + 'sudo -S socat - UNIX-CONNECT:{qga}'. + format(qga=self._temp.get('qga'))) + message = ('QGA flush failed on {host}'.format(host=self._node['host'])) + stdout, _ = exec_cmd_no_error(self._node, command, sudo=False, + message=message) + + return json.loads(stdout.split('\n', 1)[0]) if stdout else dict() def _qemu_qga_exec(self, cmd): """Execute QGA command. @@ -250,284 +368,192 @@ class QemuUtils(object): :param cmd: QGA command to execute. :type cmd: str """ - qga_cmd = 'echo "{ \\"execute\\": \\"' + cmd + '\\" }" | sudo -S nc ' \ - '-q 1 -U ' + self.__QGA_SOCK - (ret_code, stdout, stderr) = self._ssh.exec_command(qga_cmd) - if 0 != int(ret_code): - logger.debug('QGA execute failed {0}'.format(stderr)) - raise RuntimeError('QGA execute "{0}" failed on {1}'.format(cmd, - self._node['host'])) - logger.trace(stdout) - if not stdout: - return {} - return json.loads(stdout.split('\n', 1)[0]) - - def _wait_until_vm_boot(self, timeout=300): + command = ('(echo "{{ \\"execute\\": \\"{cmd}\\" }}"; sleep 1) | ' + 'sudo -S socat - UNIX-CONNECT:{qga}'. + format(cmd=cmd, qga=self._temp.get('qga'))) + message = ('QGA execute "{cmd}" failed on {host}'. + format(cmd=cmd, host=self._node['host'])) + stdout, _ = exec_cmd_no_error(self._node, command, sudo=False, + message=message) + + return json.loads(stdout.split('\n', 1)[0]) if stdout else dict() + + def _wait_until_vm_boot(self, timeout=60): """Wait until QEMU VM is booted. - Ping QEMU guest agent each 5s until VM booted or timeout. + First try to flush qga until there is output. + Then ping QEMU guest agent each 5s until VM booted or timeout. - :param timeout: Waiting timeout in seconds (optional, default 300s). + :param timeout: Waiting timeout in seconds (optional, default 60s). :type timeout: int """ start = time() - while 1: + while True: if time() - start > timeout: - raise RuntimeError('timeout, VM {0} not booted on {1}'.format( - self._qemu_opt['disk_image'], self._node['host'])) - self._qemu_qga_flush() - out = self._qemu_qga_exec('guest-ping') + raise RuntimeError('timeout, VM not booted on {host}'. + format(host=self._node['host'])) + out = None + try: + out = self._qemu_qga_flush() + except ValueError: + logger.trace('QGA qga flush unexpected output {out}'. + format(out=out)) # Empty output - VM not booted yet if not out: sleep(5) - # Non-error return - VM booted + else: + break + while True: + if time() - start > timeout: + raise RuntimeError('timeout, VM not booted on {host}'. + format(host=self._node['host'])) + out = None + try: + out = self._qemu_qga_exec('guest-ping') + except ValueError: + logger.trace('QGA guest-ping unexpected output {out}'. + format(out=out)) + # Empty output - VM not booted yet. + if not out: + sleep(5) + # Non-error return - VM booted. elif out.get('return') is not None: break - # Skip error and wait + # Skip error and wait. elif out.get('error') is not None: sleep(5) else: - raise RuntimeError('QGA guest-ping unexpected output {}'.format( - out)) - logger.trace('VM {0} booted on {1}'.format(self._qemu_opt['disk_image'], - self._node['host'])) + # If there is an unexpected output from QGA guest-info, try + # again until timeout. + logger.trace('QGA guest-ping unexpected output {out}'. + format(out=out)) + + logger.trace('VM booted on {host}'.format(host=self._node['host'])) def _update_vm_interfaces(self): """Update interface names in VM node dict.""" # Send guest-network-get-interfaces command via QGA, output example: # {"return": [{"name": "eth0", "hardware-address": "52:54:00:00:04:01"}, - # {"name": "eth1", "hardware-address": "52:54:00:00:04:02"}]} + # {"name": "eth1", "hardware-address": "52:54:00:00:04:02"}]}. out = self._qemu_qga_exec('guest-network-get-interfaces') interfaces = out.get('return') mac_name = {} if not interfaces: - raise RuntimeError('Get VM {0} interface list failed on {1}'.format( - self._qemu_opt['disk_image'], self._node['host'])) - # Create MAC-name dict + raise RuntimeError('Get VM interface list failed on {host}'. + format(host=self._node['host'])) + # Create MAC-name dict. for interface in interfaces: if 'hardware-address' not in interface: continue mac_name[interface['hardware-address']] = interface['name'] - # Match interface by MAC and save interface name + # Match interface by MAC and save interface name. for interface in self._vm_info['interfaces'].values(): mac = interface.get('mac_address') if_name = mac_name.get(mac) if if_name is None: - logger.trace('Interface name for MAC {} not found'.format(mac)) + logger.trace('Interface name for MAC {mac} not found'. + format(mac=mac)) else: interface['name'] = if_name - def _huge_page_check(self): - """Huge page check.""" - huge_mnt = self._qemu_opt.get('huge_mnt') - mem_size = self._qemu_opt.get('mem_size') - # Check size of free huge pages - (_, output, _) = self._ssh.exec_command('grep Huge /proc/meminfo') - regex = re.compile(r'HugePages_Free:\s+(\d+)') - match = regex.search(output) - huge_free = int(match.group(1)) - regex = re.compile(r'Hugepagesize:\s+(\d+)') - match = regex.search(output) - huge_size = int(match.group(1)) - if (mem_size * 1024) > (huge_free * huge_size): - raise RuntimeError('Not enough free huge pages {0} kB, required ' - '{1} MB'.format(huge_free * huge_size, mem_size)) - # Check if huge pages mount point exist - has_huge_mnt = False - (_, output, _) = self._ssh.exec_command('cat /proc/mounts') - for line in output.splitlines(): - # Try to find something like: - # none /mnt/huge hugetlbfs rw,relatime,pagesize=2048k 0 0 - mount = line.split() - if mount[2] == 'hugetlbfs' and mount[1] == huge_mnt: - has_huge_mnt = True - break - # If huge page mount point not exist create one - if not has_huge_mnt: - cmd = 'mount -t hugetlbfs -o pagesize=2048k none {0}'.format( - huge_mnt) - (ret_code, _, stderr) = self._ssh.exec_command_sudo(cmd) - if int(ret_code) != 0: - logger.debug('Mount huge pages failed {0}'.format(stderr)) - raise RuntimeError('Mount huge pages failed on {0}'.format( - self._node['host'])) - - def _huge_page_allocate(self): - """Huge page allocate.""" - huge_mnt = self._qemu_opt.get('huge_mnt') - mem_size = self._qemu_opt.get('mem_size') - # Check size of free huge pages - (_, output, _) = self._ssh.exec_command('grep Huge /proc/meminfo') - regex = re.compile(r'HugePages_Free:\s+(\d+)') - match = regex.search(output) - huge_free = int(match.group(1)) - regex = re.compile(r'HugePages_Total:\s+(\d+)') - match = regex.search(output) - huge_total = int(match.group(1)) - regex = re.compile(r'Hugepagesize:\s+(\d+)') - match = regex.search(output) - huge_size = int(match.group(1)) - - mem_needed = abs((huge_free * huge_size) - (mem_size * 1024)) - - if mem_needed: - huge_to_allocate = (mem_needed / huge_size) + huge_total - # Increase limit of allowed max hugepage count - cmd = 'echo "{0}" | sudo tee /proc/sys/vm/max_map_count'.format( - huge_to_allocate*3) - (ret_code, _, stderr) = self._ssh.exec_command_sudo(cmd) - # Increase hugepage count - cmd = 'echo "{0}" | sudo tee /proc/sys/vm/nr_hugepages'.format( - huge_to_allocate) - (ret_code, _, stderr) = self._ssh.exec_command_sudo(cmd) - if int(ret_code) != 0: - logger.debug('Mount huge pages failed {0}'.format(stderr)) - raise RuntimeError('Mount huge pages failed on {0}'.format( - self._node['host'])) - def qemu_start(self): """Start QEMU and wait until VM boot. - :return: VM node info. + :returns: VM node info. :rtype: dict - .. note:: First set at least node to run QEMU on. - .. warning:: Starts only one VM on the node. """ - # SSH forwarding - ssh_fwd = '-net user,hostfwd=tcp::{0}-:22'.format( - self._qemu_opt.get('ssh_fwd_port')) - # Memory and huge pages - mem = '-object memory-backend-file,id=mem,size={0}M,mem-path={1},' \ - 'share=on -m {0} -numa node,memdev=mem'.format( - self._qemu_opt.get('mem_size'), self._qemu_opt.get('huge_mnt')) - - # By default check only if hugepages are availbale. - # If 'huge_allocate' is set to true try to allocate as well. + DUTSetup.check_huge_page(self._node, '/mnt/huge', self._opt.get('mem')) + + command = ('{bin_path}/qemu-system-{arch} {params}'. + format(bin_path=self._opt.get('bin_path'), + arch=Topology.get_node_arch(self._node), + params=self._params)) + message = ('QEMU: Start failed on {host}!'. + format(host=self._node['host'])) + try: - self._huge_page_check() - except RuntimeError as runtime_error: - if self._qemu_opt.get('huge_allocate'): - self._huge_page_allocate() - else: - raise runtime_error - - # Setup QMP via unix socket - qmp = '-qmp unix:{0},server,nowait'.format(self.__QMP_SOCK) - # Setup serial console - serial = '-chardev socket,host=127.0.0.1,port={0},id=gnc0,server,' \ - 'nowait -device isa-serial,chardev=gnc0'.format( - self._qemu_opt.get('serial_port')) - # Setup QGA via chardev (unix socket) and isa-serial channel - qga = '-chardev socket,path=/tmp/qga.sock,server,nowait,id=qga0 ' \ - '-device isa-serial,chardev=qga0' - # Graphic setup - graphic = '-monitor none -display none -vga none' - # Run QEMU - cmd = '{0} {1} {2} {3} {4} -hda {5} {6} {7} {8} {9}'.format( - self.__QEMU_BIN, self._qemu_opt.get('smp'), mem, ssh_fwd, - self._qemu_opt.get('options'), - self._qemu_opt.get('disk_image'), qmp, serial, qga, graphic) - (ret_code, _, stderr) = self._ssh.exec_command_sudo(cmd, timeout=300) - if int(ret_code) != 0: - logger.debug('QEMU start failed {0}'.format(stderr)) - raise RuntimeError('QEMU start failed on {0}'.format( - self._node['host'])) - logger.trace('QEMU running') - # Wait until VM boot - self._wait_until_vm_boot() - # Update interface names in VM node dict - self._update_vm_interfaces() - # Return VM node dict + exec_cmd_no_error(self._node, command, timeout=300, sudo=True, + message=message) + self._wait_until_vm_boot() + # Update interface names in VM node dict. + self._update_vm_interfaces() + except RuntimeError: + self.qemu_kill_all() + raise return self._vm_info - def qemu_quit(self): - """Quit the QEMU emulator.""" - out = self._qemu_qmp_exec('quit') - err = out.get('error') - if err is not None: - raise RuntimeError('QEMU quit failed on {0}, error: {1}'.format( - self._node['host'], json.dumps(err))) - - def qemu_system_powerdown(self): - """Power down the system (if supported).""" - out = self._qemu_qmp_exec('system_powerdown') - err = out.get('error') - if err is not None: - raise RuntimeError('QEMU system powerdown failed on {0}, ' - 'error: {1}'.format(self._node['host'], json.dumps(err))) - - def qemu_system_reset(self): - """Reset the system.""" - out = self._qemu_qmp_exec('system_reset') - err = out.get('error') - if err is not None: - raise RuntimeError('QEMU system reset failed on {0}, ' - 'error: {1}'.format(self._node['host'], json.dumps(err))) - def qemu_kill(self): """Kill qemu process.""" - # TODO: add PID storage so that we can kill specific PID - # Note: in QEMU start phase there are 3 QEMU processes because we - # daemonize QEMU - self._ssh.exec_command_sudo('pkill -SIGKILL qemu') - - def qemu_clear_socks(self): - """Remove all sockets created by QEMU.""" - # If serial console port still open kill process - cmd = 'fuser -k {}/tcp'.format(self._qemu_opt.get('serial_port')) - self._ssh.exec_command_sudo(cmd) - # Delete all created sockets - for sock in self._socks: - cmd = 'rm -f {}'.format(sock) - self._ssh.exec_command_sudo(cmd) - - def qemu_system_status(self): - """Return current VM status. - - VM should be in following status: - - - debug: QEMU running on a debugger - - finish-migrate: paused to finish the migration process - - inmigrate: waiting for an incoming migration - - internal-error: internal error has occurred - - io-error: the last IOP has failed - - paused: paused - - postmigrate: paused following a successful migrate - - prelaunch: QEMU was started with -S and guest has not started - - restore-vm: paused to restore VM state - - running: actively running - - save-vm: paused to save the VM state - - shutdown: shut down (and -no-shutdown is in use) - - suspended: suspended (ACPI S3) - - watchdog: watchdog action has been triggered - - guest-panicked: panicked as a result of guest OS panic - - :return: VM status. - :rtype: str + exec_cmd(self._node, 'chmod +r {pid}'. + format(pid=self._temp.get('pid')), sudo=True) + exec_cmd(self._node, 'kill -SIGKILL $(cat {pid})'. + format(pid=self._temp.get('pid')), sudo=True) + + for value in self._temp.get_values(): + exec_cmd(self._node, 'rm -f {value}'.format(value=value), sudo=True) + + def qemu_kill_all(self, node=None): + """Kill all qemu processes on DUT node if specified. + + :param node: Node to kill all QEMU processes on. + :type node: dict """ - out = self._qemu_qmp_exec('query-status') - ret = out.get('return') - if ret is not None: - return ret.get('status') - else: - err = out.get('error') - raise RuntimeError('QEMU query-status failed on {0}, ' - 'error: {1}'.format(self._node['host'], json.dumps(err))) + if node: + self.qemu_set_node(node) + exec_cmd(self._node, 'pkill -SIGKILL qemu', sudo=True) + + for value in self._temp.get_values(): + exec_cmd(self._node, 'rm -f {value}'.format(value=value), sudo=True) + + def qemu_version(self, version=None): + """Return Qemu version or compare if version is higher than parameter. + + :param version: Version to compare. + :type version: str + :returns: Qemu version or Boolean if version is higher than parameter. + :rtype: str or bool + """ + command = ('{bin_path}/qemu-system-{arch} --version'. + format(bin_path=self._opt.get('bin_path'), + arch=Topology.get_node_arch(self._node))) + try: + stdout, _ = exec_cmd_no_error(self._node, command, sudo=True) + ver = match(r'QEMU emulator version ([\d.]*)', stdout).group(1) + return StrictVersion(ver) > StrictVersion(version) \ + if version else ver + except RuntimeError: + self.qemu_kill_all() + raise @staticmethod - def build_qemu(node): + def build_qemu(node, force_install=False, apply_patch=False): """Build QEMU from sources. :param node: Node to build QEMU on. + :param force_install: If True, then remove previous build. + :param apply_patch: If True, then apply patches from qemu_patches dir. :type node: dict + :type force_install: bool + :type apply_patch: bool + :raises RuntimeError: If building QEMU failed. """ - ssh = SSH() - ssh.connect(node) - - (ret_code, stdout, stderr) = \ - ssh.exec_command('sudo -Sn bash {0}/{1}/qemu_build.sh'.format( - Constants.REMOTE_FW_DIR, Constants.RESOURCES_LIB_SH), 1000) - logger.trace(stdout) - if 0 != int(ret_code): - logger.debug('QEMU build failed {0}'.format(stderr)) - raise RuntimeError('QEMU build failed on {0}'.format(node['host'])) + directory = (' --directory={install_dir}{patch}'. + format(install_dir=Constants.QEMU_INSTALL_DIR, + patch='-patch' if apply_patch else '-base')) + version = (' --version={install_version}'. + format(install_version=Constants.QEMU_INSTALL_VERSION)) + force = ' --force' if force_install else '' + patch = ' --patch' if apply_patch else '' + target_list = (' --target-list={arch}-softmmu'. + format(arch=Topology.get_node_arch(node))) + + command = ("sudo -E sh -c " + "'{fw_dir}/{lib_sh}/qemu_build.sh{version}{directory}" + "{force}{patch}{target_list}'". + format(fw_dir=Constants.REMOTE_FW_DIR, + lib_sh=Constants.RESOURCES_LIB_SH, + version=version, directory=directory, force=force, + patch=patch, target_list=target_list)) + message = ('QEMU: Build failed on {host}!'.format(host=node['host'])) + exec_cmd_no_error(node, command, sudo=False, message=message, + timeout=1000)