from time import time, sleep
import json
-import re
from robot.api import logger
-from resources.libraries.python.ssh import SSH
+from resources.libraries.python.ssh import SSH, SSHTimeout
from resources.libraries.python.constants import Constants
from resources.libraries.python.topology import NodeType
class QemuUtils(object):
"""QEMU utilities."""
- __QEMU_BIN = '/opt/qemu/bin/qemu-system-x86_64'
+ __QEMU_BIN = '/usr/bin/qemu-system-x86_64'
# QEMU Machine Protocol socket
__QMP_SOCK = '/tmp/qmp.sock'
# QEMU Guest Agent socket
# 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 ' \
+ '-machine pc,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
'password': 'cisco',
'interfaces': {},
}
+ # Virtio queue count
+ self._qemu_opt['queues'] = 1
self._vhost_id = 0
self._ssh = None
self._node = None
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'])
+ cmd = 'taskset -pc {0} {1}'.format(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']))
+ 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.
+ """
+ qemu_cpus = self._qemu_qmp_exec('query-cpus')['return']
+
+ for qemu_cpu in qemu_cpus:
+ cmd = 'chrt -r -p 1 {0}'.format(qemu_cpu['thread_id'])
+ (ret_code, _, stderr) = self._ssh.exec_command_sudo(cmd)
+ if int(ret_code) != 0:
+ logger.debug('Set SCHED_RR failed {0}'.format(stderr))
+ raise RuntimeError('Set SCHED_RR failed on {0}'.format(
+ self._node['host']))
+
def qemu_set_node(self, node):
"""Set node to run QEMU on.
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)
+ netdev = ' -netdev vhost-user,id=vhost{0},chardev=char{0},'\
+ 'queues={1}'.format(self._vhost_id, self._qemu_opt['queues'])
self._qemu_opt['options'] += netdev
# If MAC is not specified use autogenerated 52:54:00:00:04:<vhost_id>
# 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'
+ extend_options = 'mq=on,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)
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
+ qmp_cmd = 'echo "{ \\"execute\\": \\"qmp_capabilities\\" }' \
+ '{ \\"execute\\": \\"' + cmd + \
+ '\\" }" | sudo -S socat - UNIX-CONNECT:' + self.__QMP_SOCK
+
(ret_code, stdout, stderr) = self._ssh.exec_command(qmp_cmd)
if int(ret_code) != 0:
logger.debug('QMP execute failed {0}'.format(stderr))
def _qemu_qga_flush(self):
"""Flush the QGA parser state
"""
- qga_cmd = 'printf "\xFF" | sudo -S nc ' \
- '-q 1 -U ' + self.__QGA_SOCK
+ qga_cmd = '(printf "\xFF"; sleep 1) | sudo -S socat - UNIX-CONNECT:' + \
+ self.__QGA_SOCK
+ #TODO: probably need something else
(ret_code, stdout, stderr) = self._ssh.exec_command(qga_cmd)
if int(ret_code) != 0:
logger.debug('QGA execute failed {0}'.format(stderr))
raise RuntimeError('QGA execute "{0}" '
- 'failed on {1}'.format(cmd, self._node['host']))
+ 'failed on {1}'.format(qga_cmd,
+ self._node['host']))
logger.trace(stdout)
if not stdout:
return {}
:param cmd: QGA command to execute.
:type cmd: str
"""
- qga_cmd = 'echo "{ \\"execute\\": \\"' + cmd + '\\" }" | sudo -S nc ' \
- '-q 1 -U ' + self.__QGA_SOCK
+ qga_cmd = '(echo "{ \\"execute\\": \\"' + \
+ cmd + \
+ '\\" }"; sleep 1) | sudo -S socat - UNIX-CONNECT:' + \
+ self.__QGA_SOCK
(ret_code, stdout, stderr) = self._ssh.exec_command(qga_cmd)
if int(ret_code) != 0:
logger.debug('QGA execute failed {0}'.format(stderr))
return {}
return json.loads(stdout.split('\n', 1)[0])
- def _wait_until_vm_boot(self, timeout=300):
+ 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.
- :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')
+ try:
+ self._qemu_qga_flush()
+ out = self._qemu_qga_exec('guest-ping')
+ except ValueError:
+ logger.trace('QGA guest-ping unexpected output {}'.format(out))
# Empty output - VM not booted yet
if not out:
sleep(5)
elif out.get('error') is not None:
sleep(5)
else:
- raise RuntimeError('QGA guest-ping unexpected output {}'.format(
- out))
+ # If there is an unexpected output from QGA guest-info, try
+ # again until timeout.
+ logger.trace('QGA guest-ping unexpected output {}'.format(out))
+
logger.trace('VM {0} booted on {1}'.format(self._qemu_opt['disk_image'],
self._node['host']))
"""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'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))
+
+ # Get huge pages information
+ huge_size = self._get_huge_page_size()
+ huge_free = self._get_huge_page_free(huge_size)
+ huge_total = self._get_huge_page_total(huge_size)
+
# Check if memory reqested by qemu is available on host
if (mem_size * 1024) > (huge_free * huge_size):
# If we want to allocate hugepage dynamically
raise RuntimeError('Mount huge pages failed on {0}'.format(
self._node['host']))
+ def _get_huge_page_size(self):
+ """Get default size of huge pages in system.
+
+ :returns: Default size of free huge pages in system.
+ :rtype: int
+ :raises: RuntimeError if reading failed for three times.
+ """
+ # TODO: remove to dedicated library
+ cmd_huge_size = "grep Hugepagesize /proc/meminfo | awk '{ print $2 }'"
+ for _ in range(3):
+ (ret, out, _) = self._ssh.exec_command_sudo(cmd_huge_size)
+ if ret == 0:
+ try:
+ huge_size = int(out)
+ except ValueError:
+ logger.trace('Reading huge page size information failed')
+ else:
+ break
+ else:
+ raise RuntimeError('Getting huge page size information failed.')
+ return huge_size
+
+ def _get_huge_page_free(self, huge_size):
+ """Get total number of huge pages in system.
+
+ :param huge_size: Size of hugepages.
+ :type huge_size: int
+ :returns: Number of free huge pages in system.
+ :rtype: int
+ :raises: RuntimeError if reading failed for three times.
+ """
+ # TODO: add numa aware option
+ # TODO: remove to dedicated library
+ cmd_huge_free = 'cat /sys/kernel/mm/hugepages/hugepages-{0}kB/'\
+ 'free_hugepages'.format(huge_size)
+ for _ in range(3):
+ (ret, out, _) = self._ssh.exec_command_sudo(cmd_huge_free)
+ if ret == 0:
+ try:
+ huge_free = int(out)
+ except ValueError:
+ logger.trace('Reading free huge pages information failed')
+ else:
+ break
+ else:
+ raise RuntimeError('Getting free huge pages information failed.')
+ return huge_free
+
+ def _get_huge_page_total(self, huge_size):
+ """Get total number of huge pages in system.
+
+ :param huge_size: Size of hugepages.
+ :type huge_size: int
+ :returns: Total number of huge pages in system.
+ :rtype: int
+ :raises: RuntimeError if reading failed for three times.
+ """
+ # TODO: add numa aware option
+ # TODO: remove to dedicated library
+ cmd_huge_total = 'cat /sys/kernel/mm/hugepages/hugepages-{0}kB/'\
+ 'nr_hugepages'.format(huge_size)
+ for _ in range(3):
+ (ret, out, _) = self._ssh.exec_command_sudo(cmd_huge_total)
+ if ret == 0:
+ try:
+ huge_total = int(out)
+ except ValueError:
+ logger.trace('Reading total huge pages information failed')
+ else:
+ break
+ else:
+ raise RuntimeError('Getting total huge pages information failed.')
+ return huge_total
+
def qemu_start(self):
"""Start QEMU and wait until VM boot.
# If 'huge_allocate' is set to true try to allocate as well.
self._huge_page_check(allocate=self._qemu_opt.get('huge_allocate'))
+ # Disk option
+ drive = '-drive file={},format=raw,cache=none,if=virtio'.format(
+ self._qemu_opt.get('disk_image'))
# Setup QMP via unix socket
qmp = '-qmp unix:{0},server,nowait'.format(self.__QMP_SOCK)
# Setup serial console
'-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(
+ cmd = '{0} {1} {2} {3} {4} {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)
+ drive, 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))
self._node['host']))
logger.trace('QEMU running')
# Wait until VM boot
- self._wait_until_vm_boot()
+ try:
+ self._wait_until_vm_boot()
+ except (RuntimeError, SSHTimeout):
+ self.qemu_kill()
+ self.qemu_clear_socks()
+ raise
# Update interface names in VM node dict
self._update_vm_interfaces()
# Return VM node dict
Code Review / csit.git / blobdiff