def get_all_domains(cu):
logger.info('Obteniendo dominios')
try:
conn = libvirt.open(app.config['LOCAL_QEMU_URI'])
domains = conn.listAllDomains()
domains_list = list()
for dom in domains:
is_active = True if dom.isActive() == 1 else False
uuid = dom.UUIDString()
name = dom.name()
os_type = dom.OSType()
total_memory = round(dom.info()[1] / 1024, 2) # KB to MB
used_memory = "-" if not is_active else round(
dom.info()[2] / 1024, 2) # KB to MB
memory = dict(total=total_memory, used=used_memory)
vcpus = dom.info()[3]
state = dom.info()[0]
vnc_port = get_vnc_port(dom)
domains_list.append(
dict(uuid=uuid,
name=name,
is_active=is_active,
os_type=os_type,
memory=memory,
vcpus=vcpus,
state=state,
vnc_port=vnc_port))
conn.close()
return json_response(data=domains_list)
except Exception as e:
logger.error('No se pudo obtener los dominios: %s', str(e))
return json_response(status=500)
def get_settings(cu):
logger.info("Obteniendo parámetros")
try:
parameters = models.Config.get()
return json_response(parameters)
except Exception as e:
logger.error('Error obteniendo la configuración: %s', e)
return json_response(status=500)
def get_logs(cu):
try:
with open('dvls.log', 'r') as f:
log = f.readlines()
return json_response(data=log)
except Exception as e:
logger.error('No se ha podido leer el fichero de logs: %s', str(e))
return json_response(status=500)
def get_hosts(cu):
logger.info('Obteniendo los hosts')
try:
hosts = Host.get()
return json_response(data=[h.to_dict() for h in hosts])
except Exception as e:
logger.error('No se han podido obtener los hosts: %s', str(e))
return json_response(status=500)
def get_hosts(cu, lab_uuid):
logger.info('Obteniendo los hosts del laboratorio %s', lab_uuid)
try:
lab = Lab.get(lab_uuid)
hosts = lab.hosts
return json_response(data=[h.to_dict() for h in hosts])
except Exception as e:
logger.error('No se han podido obtener los hosts: %s', str(e))
return json_response(status=500)
def add_host(cu):
logger.info('Añadiendo host')
try:
host = Host(request.json)
host.save()
return json_response()
except Exception as e:
logger.error('No se ha podido añadir el host: %s', str(e))
return json_response(status=500)
def clone_template(cu, template_uuid):
logger.info('Desplegando plantilla')
try:
template = Template.get(template_uuid).to_dict()
domain_name = request.json['domain_name']
lab_uuid = request.json['lab_uuid']
lab = Lab.get(lab_uuid)
hosts = lab.hosts
if hosts.__len__() == 0:
logger.error('El laboratorio no tiene ningún host asociado')
return json_response(status=500)
cmd = [
'virt-clone', '--connect', app.config['LOCAL_QEMU_URI'],
'--original-xml', template['xml_path'], '--name', domain_name
]
for count in range(template['images_path'].__len__()):
cmd.append('--file')
cmd.append(app.config['DOMAIN_IMAGES_DIR'] + domain_name +
'-disk' + str(count) + '.qcow2')
ssh = paramiko.SSHClient()
# Surrounds 'known_hosts' error
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
errors = list()
for h in hosts:
host = h.ip_address
username = h.conn_user
try:
# NO PASSWORD!! Server SSH key is previously distributed among lab PCs
ssh.connect(hostname=host.compressed,
username=username,
timeout=4)
ssh_stdin, ssh_stdout, ssh_stderr = ssh.exec_command(
' '.join(cmd))
errors = [b.rstrip() for b in ssh_stderr.readlines()]
if len(errors) > 0:
logger.error(
'No se pudo desplegar la plantilla en el host %s (%s)',
h.code, h.ip_address.compressed)
logger.error(e for e in errors)
except Exception as e:
logger.error(
'No se pudo desplegar la plantilla en el host %s (%s): %s',
h.code, h.ip_address.compressed, str(e))
errors = True
finally:
ssh.close()
if errors or len(errors) > 0:
return json_response(status=500)
return json_response()
except Exception as e:
logger.error('No se pudo desplegar la plantilla: %s', str(e))
return json_response(status=500)
def delete_host(cu, host_uuid):
logger.info('Eliminando host %s', host_uuid)
try:
host = Host.get(host_uuid)
Host.delete(host)
return json_response()
except Exception as e:
logger.error('No se ha podido eliminar el host %s: %s', host_uuid,
str(e))
def get_templates(cu):
logger.info('Obteniendo plantillas')
try:
templates = Template.get()
data = [t.to_dict() for t in templates]
return json_response(data=data)
except Exception as e:
logger.error('No se pudo obtener las plantillas: %s', str(e))
return json_response(status=500)
def get_labs(cu):
logger.info('Obteniendo laboratorios')
try:
labs = Lab.get()
data = [l.to_dict() for l in labs]
return json_response(data=data)
except Exception as e:
logger.error('No se pudo obtener los laboratorios: %s', str(e))
return json_response(status=500)
async def exception_handler(request, exception):
"""
意外错误
:param request:
:param exception:
:return:
"""
logger.error(traceback.format_exc())
return json_fail_response()
def clear_logs(cu):
logger.info('Limpiando el fichero de logs')
try:
logs_file = open('dvls.log', 'w')
logs_file.truncate()
logs_file.close()
return json_response()
except Exception as e:
logger.error('No se ha podido limpiar el fichero de logs: %s', str(e))
return json_response(status=500)
def update_lab(cu, lab_uuid):
logger.info('Actualizando laboratorio %s', lab_uuid)
try:
lab = Lab.get(lab_uuid)
lab.update(request.json)
return json_response()
except Exception as e:
logger.error('No se pudo actualizar el laboratorio %s: %s', lab_uuid,
e)
return json_response(status=500)
def delete_lab(cu, lab_uuid):
logger.info('Eliminando laboratorio')
try:
lab = Lab.get(lab_uuid)
Lab.delete(lab)
return json_response()
except Exception as e:
logger.error('No se pudo eliminar el laboratorio seleccionado: %s',
str(e))
return json_response(status=500)
def get_dashboard():
logger.info('Cargando dashboard')
try:
conn = libvirt.open(app.config['LOCAL_QEMU_URI'])
host_info = get_host_details(conn)
host_info['templates'] = len(Template.get())
host_info['labs'] = len(Lab.get())
conn.close()
return json_response(data=host_info)
except Exception as e:
logger.error('No se pudo obtener el dashboard: %s', libvirt.virGetLastErrorMessage())
return json_response(status=500)
def delete_template(cu, template_uuid):
logger.info('Eliminando plantilla')
try:
template = Template.get(template_uuid)
for image_path in pickle.loads(template.images_path):
subprocess.check_call(['rm', '-f', image_path])
subprocess.check_call(['rm', '-f', template.xml_path])
Template.delete(template)
return json_response()
except Exception as e:
logger.error('No se pudo eliminar la plantilla: %s', str(e))
return json_response(status=500)
def reboot_domain(cu, domain_uuid):
logger.info('Reiniciando dominio %s', domain_uuid)
try:
conn = libvirt.open(app.config['LOCAL_QEMU_URI'])
domain = conn.lookupByUUIDString(domain_uuid)
domain.reboot(libvirt.VIR_DOMAIN_REBOOT_DEFAULT)
time.sleep(3)
conn.close()
return json_response()
except Exception as e:
logger.error('No se ha podido reiniciar el dominio %s: %s',
domain_uuid, str(e))
return json_response(status=500)
def get_all_domains(cu):
logger.info('Obteniendo dominios')
try:
conn = libvirt.open(app.config['LOCAL_QEMU_URI'])
domains = conn.listAllDomains()
domains_list = list()
for dom in domains:
is_active = True if dom.isActive() == 1 else False
uuid = dom.UUIDString()
name = dom.name()
os_type = dom.OSType()
total_memory = round(dom.info()[1] / 1024, 2) # KB to MB
used_memory = "-" if not is_active else round(
dom.info()[2] / 1024, 2) # KB to MB
memory = dict(total=total_memory, used=used_memory)
vcpus = dom.info()[3]
state = dom.info()[0]
vnc_port = get_vnc_port(dom)
# ADDED SUPPORT FOR DISKS
xml = ET.fromstring(dom.XMLDesc())
devices = xml.findall('devices/disk')
disk = {}
for d in devices:
if d.get('device') == 'disk':
file_path = d.find('source').get('file')
disk_info = dom.blockInfo(file_path)
disk['capacity'] = round(disk_info[0] / 1024 / 1024 / 1024,
2)
disk['allocation'] = round(
disk_info[1] / 1024 / 1024 / 1024, 2)
disk['physical'] = round(disk_info[2] / 1024 / 1024 / 1024,
2)
domains_list.append(
dict(uuid=uuid,
name=name,
is_active=is_active,
os_type=os_type,
memory=memory,
vcpus=vcpus,
state=state,
disk=disk,
vnc_port=vnc_port))
conn.close()
return json_response(data=domains_list)
except Exception as e:
logger.error('No se pudo obtener los dominios: %s', str(e))
return json_response(status=500)
def update_domain(cu, domain_uuid):
logger.info('Actualizando el dominio %s', domain_uuid)
data = request.json
try:
conn = libvirt.open(app.config['LOCAL_QEMU_URI'])
dom = conn.lookupByUUIDString(domain_uuid)
dom.setMaxMemory(int(data['memory']) * 1024)
dom.setVcpusFlags(
int(data['vcpus']),
libvirt.VIR_DOMAIN_AFFECT_CONFIG | libvirt.VIR_DOMAIN_VCPU_MAXIMUM)
dom.setVcpusFlags(int(data['vcpus']))
except Exception as e:
logger.error("No se ha podido actualizar el dominio %s: %s",
domain_uuid, str(e))
return json_response(status=200)
def create_lab(cu):
logger.info('Añadiendo laboratorio')
try:
lab = Lab(request.json)
ip_range = ip_range_to_list(lab.start_ip_range, lab.end_ip_range)
for ip in ip_range:
data = dict(code=lab.code + '_' + str(ip_range.index(ip)),
ip_address=ip,
conn_user='******',
lab_uuid=lab.uuid)
lab.add_host(Host(data))
lab.save()
return json_response()
except Exception as e:
logger.error('No se pudo añadir el laboratorio: %s', str(e))
return json_response(status=500)
def start_domain(cu, domain_uuid):
logger.info('Encendiendo dominio %s', domain_uuid)
try:
conn = libvirt.open(app.config['LOCAL_QEMU_URI'])
domain = conn.lookupByUUIDString(domain_uuid)
domain.create()
time.sleep(3)
domain = conn.lookupByUUIDString(domain_uuid)
if domain.info()[0] != libvirt.VIR_DOMAIN_RUNNING:
logger.error('No se pudo encender el dominio %s', domain_uuid)
conn.close()
return json_response(status=500)
conn.close()
return json_response()
except Exception as e:
logger.error('No se pudo encender el dominio %s: %s', domain_uuid,
str(e))
return json_response(status=500)
def decorated(*args, **kwargs):
token = None
if 'JWT-Token' in request.headers:
token = request.headers['JWT-Token']
if not token:
logger.error(
'No se ha encontrado el token de sesión en las cabeceras')
return json_response(status=401)
try:
data = jwt.decode(token, app.config['SECRET_KEY'])
current_user = data['username']
except Exception as e:
exc_type, exc_obj, exc_tb = sys.exc_info()
fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1]
print(exc_type, fname, exc_tb.tb_lineno)
logger.error('El token de sesión no es válido o ha caducado')
return json_response(status=401)
return f(current_user, *args, **kwargs)
def shutdown_domain(cu, domain_uuid):
logger.info('Apagando el dominio %s', domain_uuid)
try:
conn = libvirt.open(app.config['LOCAL_QEMU_URI'])
domain = conn.lookupByUUIDString(domain_uuid)
domain.destroy()
time.sleep(3)
domain = conn.lookupByUUIDString(domain_uuid)
if domain.info()[0] != libvirt.VIR_DOMAIN_SHUTOFF:
logger.error('No se pudo apagar el dominio %s', domain_uuid)
conn.close()
return json_response(status=500)
conn.close()
return json_response()
except Exception as e:
logger.error('No se ha podido apagar el dominio %s: %s', domain_uuid,
str(e))
return json_response(status=500)
def create_domain(cu):
logger.info('Creando dominio')
data = request.json
cmd = [
'virt-install', '--connect', app.config['LOCAL_QEMU_URI'], '--name',
data['name'], '--memory',
str(data['memory']), '--vcpus',
str(data['vcpus']), '--os-variant', data['os_variant'],
'--noautoconsole'
]
if data['graphics']['vnc']:
cmd.append('--graphics')
cmd.append('vnc,listen=' + data['graphics']['listen'] + ',password='******'graphics']['password'])
if data['installation_type'] == "iso":
cmd.append('--disk')
cmd.append('size=' + str(data['disk']['size']))
cmd.append('--cdrom')
cmd.append(data['cdrom'])
elif data['installation_type'] == "image":
cmd.append('--disk')
cmd.append(data['disk']['path'])
cmd.append('--import')
elif data['installation_type'] == "network":
cmd.append('--disk')
cmd.append('size=' + str(data['disk']['size']))
cmd.append('--location')
cmd.append(data['location'])
elif data['installation_type'] == "pxe":
cmd.append('--disk')
cmd.append('size=' + str(data['disk']['size']))
cmd.append('--network')
cmd.append(data['network'])
cmd.append('--pxe')
else:
logger.warn('El método de instalación no es correcto')
return json_response(status=400)
try:
subprocess.check_call(cmd)
return json_response()
except Exception as e:
logger.error('No se ha podido crear el dominio: %s', str(e))
return json_response(status=500)
def delete_domain(cu, domain_uuid):
logger.info('Eliminando dominio %s', domain_uuid)
try:
conn = libvirt.open(app.config['LOCAL_QEMU_URI'])
domain = conn.lookupByUUIDString(domain_uuid)
xml = ET.fromstring(domain.XMLDesc())
devices = xml.findall('devices/disk')
for d in devices:
if d.get('device') == 'disk':
file_path = d.find('source').get('file')
disk = conn.storageVolLookupByPath(file_path)
disk.delete(libvirt.VIR_STORAGE_VOL_DELETE_NORMAL)
domain.undefine()
conn.close()
return json_response()
except Exception as e:
logger.error('No se pudo eliminar el dominio %s: %s', domain_uuid,
str(e))
return json_response(status=500)
def login():
logger.debug('Autenticando usuario')
try:
auth = request.authorization
if not auth or not auth.username or not auth.password:
logger.error(
'No se ha podido autenticar al usuario: faltan las credenciales!'
)
return json_response(status=400)
p = pam.pam()
# user = p.authenticate(username=auth.username, password=auth.password, service='dvls')
user = p.authenticate(username=auth.username, password=auth.password)
if user and (auth.username == app.config['CONN_USER']):
token = jwt.encode(
dict(username=auth.username,
exp=datetime.utcnow() + timedelta(minutes=60)),
app.config['SECRET_KEY'])
return json_response(data=dict(token=token.decode('UTF-8')))
logger.error(
'No se ha podido autenticar al usuario: las credenciales son incorrectas!'
)
return json_response(status=403)
except Exception as e:
logger.error('No se ha podido autenticar al usuario: %s', str(e))
return json_response(status=500)
def create_domain(self, data):
cmd = [
'virt-install', '--connect', app.config['LOCAL_QEMU_URI'], '--name',
data['name'], '--memory',
str(data['memory']), '--vcpus',
str(data['vcpus']), '--os-variant', data['os_variant'],
'--noautoconsole'
]
if data['graphics']['vnc']:
cmd.append('--graphics')
cmd.append('vnc,listen=' + data['graphics']['listen'] + ',password='******'graphics']['password'])
if data['installation_type'] == "iso":
cmd.append('--disk')
cmd.append('size=' + str(data['disk']['size']))
cmd.append('--cdrom')
cmd.append(data['cdrom'])
elif data['installation_type'] == "image":
cmd.append('--disk')
cmd.append(data['disk']['path'])
cmd.append('--import')
elif data['installation_type'] == "network":
cmd.append('--disk')
cmd.append('size=' + str(data['disk']['size']))
cmd.append('--location')
cmd.append(data['location'])
elif data['installation_type'] == "pxe":
cmd.append('--disk')
cmd.append('size=' + str(data['disk']['size']))
cmd.append('--network')
cmd.append(data['network'])
cmd.append('--pxe')
else:
logger.warn('El método de instalación no es correcto')
socketio = SocketIO(message_queue=app.config['CELERY_BROKER_URL'])
socketio.emit(
'task-finished', {
'task_type': 'add-domain',
'task_id': self.request.id.__str__(),
'status': -1
})
return -1
try:
subprocess.check_call(cmd)
logger.info('Dominio creado')
socketio = SocketIO(message_queue=app.config['CELERY_BROKER_URL'])
socketio.emit(
'task-finished', {
'task_type': 'add-domain',
'task_id': self.request.id.__str__(),
'status': 0
})
return 0
except Exception as e:
logger.error('No se ha podido crear el dominio: %s', str(e))
socketio = SocketIO(message_queue=app.config['CELERY_BROKER_URL'])
socketio.emit(
'task-finished', {
'task_type': 'add-domain',
'task_id': self.request.id.__str__(),
'status': -1
})
return -1
def clone_template(self, template_uuid, data):
logger.info("Desplegando nueva plantilla")
socketio = SocketIO(message_queue=app.config['CELERY_BROKER_URL'])
try:
template = Template.get(template_uuid).to_dict()
domain_name = data['domain_name']
lab_uuid = data['lab_uuid']
lab = Lab.get(lab_uuid)
hosts = lab.hosts
if hosts.__len__() == 0:
logger.error('El laboratorio no tiene ningún host asociado')
socketio.emit('task-finished', {
'task_type': 'clone-template',
'task_id': self.request.id.__str__(),
'status': -1
})
return -1
cmd = ['virt-clone',
'--connect', app.config['LOCAL_QEMU_URI'],
'--original-xml', template['xml_path'],
'--name', domain_name]
for count in range(template['images_path'].__len__()):
cmd.append('--file')
cmd.append(app.config['DOMAIN_IMAGES_DIR'] + domain_name + '-disk' + str(count) + '.qcow2')
ssh = paramiko.SSHClient()
# Surrounds 'known_hosts' error
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
k = paramiko.RSAKey.from_private_key_file("/home/dvls/.ssh/id_rsa")
errors = list()
for h in hosts:
host = h.ip_address
username = h.conn_user
logger.debug('Desplegando en el host %s, IP: %s', h.code, h.ip_address)
try:
# NO PASSWORD!! Server SSH key is previously distributed among lab PCs
logger.debug('Conectando al equipo')
ssh.connect(hostname=host.compressed, username=username, timeout=4, pkey=k)
ssh_stdin, ssh_stdout, ssh_stderr = ssh.exec_command(' '.join(cmd))
errors = [b.rstrip() for b in ssh_stderr.readlines()]
if len(errors) > 0:
logger.error('No se pudo desplegar la plantilla en el host %s (%s)', h.code, h.ip_address.compressed)
logger.error(cmd)
logger.error(errors)
except Exception as e:
logger.error('No se pudo desplegar la plantilla en el host %s (%s): %s', h.code, h.ip_address.compressed, str(e))
errors = True
finally:
logger.debug('Desplegado en el equipo %s', h.code)
ssh.close()
if errors or len(errors) > 0:
socketio.emit('task-finished', {
'task_type': 'clone-template',
'task_id': self.request.id.__str__(),
'status': -1
})
return -1
socketio.emit('task-finished', {
'task_type': 'clone-template',
'task_id': self.request.id.__str__(),
'status': 0
})
logger.info("Plantilla desplegada correctamente")
return 0
except Exception as e:
logger.error('No se pudo desplegar la plantilla: %s', str(e))
socketio.emit('task-finished', {
'task_type': 'clone-template',
'task_id': self.request.id.__str__(),
'status': -1
})
return -1
def create_template(self, data):
socketio = SocketIO(message_queue=app.config['CELERY_BROKER_URL'])
try:
domain_uuid = data['domain_uuid']
template_name = data['template_name']
template_description = data['template_description']
do_sysprep = data['do_sysprep']
# Check domain state
conn = libvirt.open(app.config['LOCAL_QEMU_URI'])
domain = conn.lookupByUUIDString(domain_uuid)
if domain.isActive():
logger.error('No se pudo crear la plantilla: el dominio debe estar apagado')
socketio.emit('task-finished', {
'task_type': 'create-template',
'task_id': self.request.id.__str__(),
'status': -1
})
return -1
# Domain cloning (get disks paths and some hardware stuff)
info = domain.info()
memory = info[2]
vcpus = info[3]
xml = ET.fromstring(domain.XMLDesc())
devices = xml.findall('devices/disk')
disks = list()
for d in devices:
if d.get('device') == 'disk':
file_path = d.find('source').get('file')
disks.append(file_path)
cmd = ['virt-clone',
'--connect', app.config['LOCAL_QEMU_URI'],
'--original', domain.name(),
'--name', template_name]
template_images_path = list()
for count in range(disks.__len__()):
template_image_path = app.config['TEMPLATE_IMAGES_DIR'] + template_name + '-disk' + str(count) + '.qcow2'
template_images_path.append(template_image_path)
cmd.append('--file')
cmd.append(template_image_path)
subprocess.check_call(cmd)
if do_sysprep:
# Decontextualize the template and dumps XML --> USING POLICYKIT WITH 'virt-sysprep'
subprocess.check_call(['pkexec', '/usr/bin/virt-sysprep',
'--connect', app.config['LOCAL_QEMU_URI'],
'--domain', template_name])
template_xml = str(app.config['TEMPLATE_DEFINITIONS_DIR'] + template_name + '.xml')
proc = subprocess.Popen(['virsh', '--connect', app.config['LOCAL_QEMU_URI'], 'dumpxml', template_name],
stdout=subprocess.PIPE)
out = proc.stdout.read().decode('utf-8')
# print(out)
file = open(str(template_xml), 'w')
file.write(out)
file.close()
# Undefine template
template = conn.lookupByName(template_name)
template.undefine()
# Add template to database
data = dict(name=template_name,
description=template_description,
vcpus=vcpus,
memory=memory,
xml_path=template_xml,
images_path=template_images_path)
template = Template(data)
template.save()
logger.info("Plantilla creada")
socketio.emit('task-finished', {
'task_type': 'create-template',
'task_id': self.request.id.__str__(),
'status': 0
})
return 0
except Exception as e:
# TODO - Delete template on fs if Exception is instance of sqlite3.OperationalError
logger.error('No se pudo crear la plantilla: %s', str(e))
socketio.emit('task-finished', {
'task_type': 'create-template',
'task_id': self.request.id.__str__(),
'status': -1
})
return -1
