：创建集群

接口

接口名称：create_cluster

参数

ClusterDescription 对象可通过 JSON 串初始化，具体参数请参阅 API 创建集群描述。

返回值

成功返回 CreateResponse 对象，可以通过 response.Id的方式获取新集群的标识符。

例子

下面是一个创建集群的例子，可执行的代码部分是一个简单的例子。注释掉的代码中是其他的参数的配置，您可以根据自己的需要打开相关的功能。关于各个参数具体配置信息请参考 API 创建集群描述。

Python 源码：

import time
import random
import string
import batchcompute
from batchcompute import CN_SHENZHEN as REGION
from batchcompute import Client, ClientError
from batchcompute.resources import (
    JobDescription, TaskDescription, DAG,
    GroupDescription, ClusterDescription,
    Configs, Networks, VPC, Classic, Mounts, Notification, Topic
)

ACCESS_KEY_ID = 'Your Access Key Id'
ACCESS_KEY_SECRET = 'Your Access Key Secret'

IMAGE_ID = 'img-ubuntu'
INSTANCE_TYPE  = 'ecs.sn2ne.large'

client = Client(REGION, ACCESS_KEY_ID, ACCESS_KEY_SECRET)

def create_cluster(idempotent_token=''):
    try:
        # Cluster description.
        cluster_desc = ClusterDescription()
        cluster_desc.Name = "test-cluster"
        cluster_desc.Description = "demo"
        cluster_desc.ImageId = IMAGE_ID
        cluster_desc.InstanceType = INSTANCE_TYPE
        #cluster_desc.UserData = {'key1': 'value1', 'key2': 'value2'}
        #cluster_desc.Bootstrap = '' #your boot program
        #cluster_desc.EnvVars = {'key3': 'value3', 'key4':'value4'}

        #Group description
        group_desc1 = GroupDescription()
        group_desc1.DesiredVMCount = 4
        group_desc1.InstanceType = 'ecs.sn1ne.large'  #user group special instance type
        group_desc1.ResourceType = 'OnDemand'
        #group_desc1.SpotStrategy = 'SpotAsPriceGo'
        #group_desc1.SpotPriceLimit = 0.1
        #group_desc2 = GroupDescription()
        #group_desc2.DesiredVMCount = 8
        #group_desc2.InstanceType = ''
        #group_desc2.ResourceType = 'OnDemand'

        cluster_desc.add_group('group1', group_desc1)
        #cluster_desc.add_group('group2', group_desc2)

        #Configs
        configs = Configs()
        #Configs.Disks
        configs.add_system_disk(50, 'cloud_efficiency')
        configs.add_data_disk(500, 'cloud_efficiency', '/home/my-data-disk')

        #Configs.Networks
        networks  = Networks()
        vpc = VPC()
        vpc.CidrBlock = '192.168.0.0/16'
        #vpc.VpcId = 'vpc-xxxxx'
        networks.VPC = vpc
        #classic = Classic()
        #classic.AllowSecurityGroup = []
        #classic.AllowSecurityGroupEgress = []
        #classic.AllowIpAddress = []
        #classic.AllowIpAddressEgress = []
        #networks.Classic = classic
        configs.Networks = networks

        #Configs.Mounts
        #mounts = Mounts()
        #nas_entry = {'Source': 'nas://26a174a62f-sfi98.cn-shenzhen.nas.aliyuncs.com:/',
        #          'Destination': '/home/admin/mydir1/',
        #          'WriteSupport': True}
        #oss_entry = {'Source': 'oss://my-test-bk/',
        #          'Destination': '/home/admin/mydir3/',
        #          'WriteSupport': True}
        #mounts.Entries = [nas_entry, oss_entry]
        #mounts.Locale = 'GBK'
        #mounts.Lock = False
        #mounts.CacheSupport = True
        #mounts.CacheBlockSize = 262144
        #mounts.CacheTotalSize = 536870912
        #mounts.OSS.AccessKeyId = 'OSS Access Key Id'
        #mounts.OSS.AccessKeySecret = 'OSS Access Key Secret'
        #mounts.OSS.SecurityToken = ''
        #configs.Mounts = mounts

        cluster_desc.Configs = configs

        #Notification
        #notification = Notification()
        #topic = Topic()
        #topic.Name = 'testlow'
        #topic.Endpoint = 'http://48351.mns.cn-shenzhen.aliyuncs.com/'
        #topic.Events = ["OnClusterDeleted", "OnInstanceCreated", "OnInstanceActive"]
        #notification.Topic = topic
        #cluster_desc.Notification = notification

        print cluster_desc
        rsp = client.create_cluster(cluster_desc, idempotent_token)
        #rsp = client.create_cluster(cluster_desc)
        print rsp
        return True
    except ClientError, e:
        print (e.get_status_code(), e.get_code(), e.get_requestid(), e.get_msg())
        return False

if __name__ == '__main__':
    #Not Use idempotent token
    create_cluster()

    #Use idempotent token
    #str_list = [random.choice(string.digits + string.ascii_letters) for i in range(32)]
    #random_str = ''.join(str_list)
    #print random_str
    #ret = False
    #loop = 0
    #while loop < 5 and ret == False:
    #    ret = create_cluster(random_str)
    #    loop += 1

执行结果：

{
    "Date": "Thu, 08 Nov 2018 11:21:34 GMT",
    "Id": "cls-6kie8e833lnov8gg50k00c",
    "RequestId": "CE68B00C-4D3C-48EA-8EBD-1F48FFDA0C1D",
    "StatusCode": 201
}

注意点

以下的各点都在 API 文档中有相关的详细说明。

1、集群中默认只支持1个组，受配额限制。

2、如果 Group 中有配置 ResourceType，优先使用 Group 中的 ResourceType

3、实例的实例类型与磁盘类型有一定的对应关系，请参考ECS的实例文档。

4、建议您使用 VPC 网络。您可以指定VpcId，如果不指定我们会自动给您创建。注意CidrBlock的格式。

5、Mount 的路径请注意格式。如果挂在NAS，必须使用VPC，并且VPC配置中的VpcId必须是跟NAS在同一个VpcId下。

6、挂载 OSS 文件的访问权限可以通过单独配置 Access Key Id / Access Key Secrect。

7、如果您需要关心集群实时状态，可以通过 Notification 来获取。

8、如果需要保证请求的幂等性，可以通过生成 Idempotent Token 来创建集群。