def import_block(request):
try:
#验证input
configs = get_config()
block_name = request.POST.get('name')
compute_group = request.POST.get('compute_group')
if block_name == '':
raise ValueError('block name field is empty')
if compute_group == '':
raise ValueError('compute group field is empty')
#筛选出一个合适的host
res = ansible.runner.Runner(module_name='ping', module_args='', pattern=compute_group, forks=10).run()
compute_nodes = res['contacted']
des_node = compute_nodes.keys()[int(random.random() * len(compute_nodes))]
#验证block 是否存在
args = 'ls ' + configs['block_path'] + '/' + block_name
res = ansible.runner.Runner(module_name='shell', module_args=args, pattern=des_node, forks=10).run()
if res['contacted'][des_node]['stderr'] != '':
raise ValueError('the block is not exist!')
#如果已经导入过返回ERROR
result = Storage.objects.filter(uuid=block_name)
if len(result) > 0:
raise ValueError('已经导入过，不能重复导入')
#得到block 的虚拟大小、实际使用大小、类型
args = '/usr/bin/qemu-img info ' + configs['block_path'] + '/' + block_name
res = ansible.runner.Runner(module_name='shell', module_args=args, pattern=des_node, forks=10).run()
d = {}
for s in res['contacted'][des_node]['stdout'].split('\n'):
item = s.split(":")
if item[0].strip() == 'file format' or item[0].strip() == 'virtual size' \
or item[0].strip() == 'disk size':
key, value = item
d[key.strip()] = value.strip()
#如果成功就将此条数据，插入数据库，失败返回 ERROR
block = Storage()
block.block_name = block_name
block.block_path = configs['block_path'] + '/' + block_name
block.size = d['virtual size'].split('(')[0]
block.type = d['file format']
block.used_size = d['disk size']
block.crated_at = timezone.now()
block.is_mounted = False
block.uuid = block_name
block.compute_group = compute_group
block.save()
#log
name = ''
mesStr = request.session.get('username', 'root') + ' import block ' + d['virtual size'].split('(')[0] + ' named ' + block_name
logger = getLogger(name)
logger.info(mesStr)
return HttpResponseRedirect(reverse('blockmanager:index'))
except Exception, e:
name = request.session.get('username', 'root')
logger = getLogger(name)
logger.error(e)
return HttpResponse(e)
def create_block(request):
try:
#验证input
configs = get_config()
block_name = request.POST['name']
if block_name == '':
raise ValueError('block name field is empty')
size = request.POST['size']
if(size == ''):
raise ValueError('size field is empty')
size = int(size)
block_type = request.POST['type']
if block_type == '':
raise ValueError('block_type field is empty')
if block_type not in configs['block_type']:
raise ValueError('block type is undefined')
compute_group = request.POST.get('compute_group')
if compute_group == '':
raise ValueError('compute group field is empty')
#筛选出一个合适的host
res = ansible.runner.Runner(module_name='ping', module_args='', pattern=compute_group, forks=10).run()
compute_nodes = res['contacted']
des_node = compute_nodes.keys()[int(random.random() * len(compute_nodes))]
#得到block 的uuid, 并确保唯一性
block_uuid = uuid.uuid1().hex
#调用API，在筛选出的host上创建block
if block_type == 'qcow2':
args = '/usr/bin/qemu-img create -f qcow2 -o preallocation=metadata ' + configs['block_path'] + '/' + block_uuid + '.qcow2 ' + str(size) + 'G'
res = ansible.runner.Runner(module_name='shell', module_args=args, pattern=des_node, forks=10).run()
if res['contacted'][des_node]['stderr'] != '':
raise ValueError(res['contacted'][des_node]['stderr'])
#如果成功就将此条数据，插入数据库，失败返回 ERROR
block = Storage()
block.block_name = block_name
block.block_path = configs['block_path'] + '/' + block_uuid + '.' + block_type
block.size = str(size) + 'G'
block.type = block_type
block.crated_at = timezone.now()
block.is_mounted = False
block.uuid = block_uuid
block.compute_group = compute_group
block.save()
#log
name = ''
mesStr = request.session.get('username', 'root') + ' create block ' + str(size) + 'G named ' + block_name
logger = getLogger(name)
logger.info(mesStr)
#success
return HttpResponseRedirect(reverse('blockmanager:index'))
except Exception, e:
name = request.session.get('username', 'root')
logger = getLogger(name)
logger.error(e)
return HttpResponse(e)