Example #1
0
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)
Example #2
0
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)