X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=resources%2Flibraries%2Fpython%2FQemuUtils.py;h=3751cd6da9e991dd9fd6c944b6aa6c39ec84d638;hp=7249b5e206bdde51ccbf62e4b8aace62db56a44a;hb=411b4dfab6252c55d8235afaf3d1324b50b61f00;hpb=bbef393dee133408378a5aee83c3844affc9afe3 diff --git a/resources/libraries/python/QemuUtils.py b/resources/libraries/python/QemuUtils.py index 7249b5e206..3751cd6da9 100644 --- a/resources/libraries/python/QemuUtils.py +++ b/resources/libraries/python/QemuUtils.py @@ -13,10 +13,12 @@ """QEMU utilities library.""" +from time import time, sleep import json import re -from time import time, sleep + from robot.api import logger + from resources.libraries.python.ssh import SSH from resources.libraries.python.constants import Constants from resources.libraries.python.topology import NodeType @@ -25,7 +27,7 @@ from resources.libraries.python.topology import NodeType class QemuUtils(object): """QEMU utilities.""" - __QEMU_BIN = '/tmp/qemu-2.2.1/build/x86_64-softmmu/qemu-system-x86_64' + __QEMU_BIN = '/opt/qemu/bin/qemu-system-x86_64' # QEMU Machine Protocol socket __QMP_SOCK = '/tmp/qmp.sock' # QEMU Guest Agent socket @@ -37,14 +39,22 @@ class QemuUtils(object): 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'] = '-daemonize -enable-kvm ' \ + 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' + '-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' + # Affinity of qemu processes + self._qemu_opt['affinity'] = False # VM node info dict self._vm_info = { 'type': NodeType.VM, @@ -82,13 +92,21 @@ class QemuUtils(object): self._qemu_opt['ssh_fwd_port'] = fwd_port self._vm_info['port'] = fwd_port + def qemu_set_serial_port(self, port): + """Set serial console port. + + :param port: Serial console port. + :type port: int + """ + self._qemu_opt['serial_port'] = port + def qemu_set_mem_size(self, mem_size): """Set virtual RAM size. :param mem_size: RAM size in Mega Bytes. :type mem_size: int """ - self._qemu_opt['mem_size'] = mem_size + self._qemu_opt['mem_size'] = int(mem_size) def qemu_set_huge_mnt(self, huge_mnt): """Set hugefile mount point. @@ -98,6 +116,10 @@ class QemuUtils(object): """ self._qemu_opt['huge_mnt'] = huge_mnt + 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. @@ -106,11 +128,19 @@ class QemuUtils(object): """ self._qemu_opt['disk_image'] = disk_image + def qemu_set_affinity(self, mask): + """Set qemu affinity by taskset with cpu mask. + + :param mask: Hex CPU mask. + :type mask: str + """ + self._qemu_opt['affinity'] = mask + def qemu_set_node(self, node): """Set node to run QEMU on. :param node: Node to run QEMU on. - :param node: dict + :type node: dict """ self._node = node self._ssh = SSH() @@ -143,9 +173,11 @@ class QemuUtils(object): # 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}'.format( - self._vhost_id, mac) + 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 if_data = {'mac_address': mac, 'socket': socket} @@ -182,6 +214,21 @@ class QemuUtils(object): 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]) + def _qemu_qga_exec(self, cmd): """Execute QGA command. @@ -200,7 +247,7 @@ class QemuUtils(object): logger.trace(stdout) if not stdout: return {} - return json.loads(stdout) + return json.loads(stdout.split('\n', 1)[0]) def _wait_until_vm_boot(self, timeout=300): """Wait until QEMU VM is booted. @@ -215,6 +262,7 @@ class QemuUtils(object): 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') # Empty output - VM not booted yet if not out: @@ -222,6 +270,9 @@ class QemuUtils(object): # Non-error return - VM booted elif out.get('return') is not None: break + # Skip error and wait + elif out.get('error') is not None: + sleep(5) else: raise RuntimeError('QGA guest-ping unexpected output {}'.format( out)) @@ -241,6 +292,8 @@ class QemuUtils(object): self._qemu_opt['disk_image'], 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 for interface in self._vm_info['interfaces'].values(): @@ -286,12 +339,46 @@ class QemuUtils(object): 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 + :return: VM node info. :rtype: dict - .. note:: First set at least disk image and node to run QEMU on. + .. 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( @@ -300,18 +387,36 @@ class QemuUtils(object): 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')) - self._huge_page_check() + + # By default check only if hugepages are availbale. + # If 'huge_allocate' is set to true try to allocate as well. + 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 QGA via chardev (unix socket) and virtio-serial channel + # 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 virtio-serial ' \ - '-device virtserialport,chardev=qga0,name=org.qemu.guest_agent.0' + '-device isa-serial,chardev=qga0' + # Graphic setup + graphic = '-monitor none -display none -vga none' + qbin = 'taskset {0} {1}'.format(self._qemu_opt.get('affinity'), + self.__QEMU_BIN) if self._qemu_opt.get( + 'affinity') else self.__QEMU_BIN # Run QEMU - cmd = '{0} {1} {2} {3} {4} -hda {5} {6} {7}'.format( - self.__QEMU_BIN, self._qemu_opt.get('smp'), mem, ssh_fwd, + cmd = '{0} {1} {2} {3} {4} -hda {5} {6} {7} {8} {9}'.format( + qbin, self._qemu_opt.get('smp'), mem, ssh_fwd, self._qemu_opt.get('options'), - self._qemu_opt.get('disk_image'), qmp, qga) + 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)) @@ -358,6 +463,10 @@ class QemuUtils(object): 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) @@ -365,6 +474,24 @@ class QemuUtils(object): 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 """