ZStack - 创建云主机计算规格

/ 前言 /

在ZStack的API中, 大多数的API返回的是一个任务结果查询地址, 此时我们就需要根据这个地址轮训去查询任务状态及结果

{ 
	"location": "http://localhost:8080/v1/api-jobs/967a26b7431c49c0b1d50d709ef1aef3" 
}

/ API /

API名称

创建云主机规格(CreateInstanceOffering)
请求方式

POST zstack/v1/instance-offerings

curl示例

curl -H "Content-Type: application/json" \
-H "Authorization: OAuth b86c9016b4f24953a9edefb53ca0678c" \
-X POST -d '{"params":{"name":"instanceOffering","cpuNum":2.0,"memorySize":2097152.0," sortKey":0.0,"type":"UserVm"}}' \
http://localhost:8080/zstack/v1/instance-offerings

返回示例

{"inventory": {
	"uuid": "d04e02a97d6c4ad0b0acee2a2f6c7084", 
	"name": "instanceOffering1",
	"cpuNum": 2.0,
	"cpuSpeed": 1.0,
	"type": "UserVm",
	"allocatorStrategy": "Mevoco",
	"createDate": "Jun 7, 2017 9:20:40 PM", 
	"lastOpDate": "Jun 7, 2017 9:20:40 PM",
	"state": "Enabled"
}}

/ 代码 /

ZStack中, 大多数的API在调用后返回的是

user_name = 'admin'
user_password='password'
host = 'http://localhost:8080/'


# 创建计算规格
def create_instance_offerings(session_uuid):
    data = json.dumps({
        "params": {
            "name": "instanceOffering",
            # cpu数量
            "cpuNum": 2.0,
            # 内存大小, 以B为单位
            "memorySize": 104857600.0}})
    url = host + 'zstack/v1/instance-offerings'
    headers = {"Content-Type": "application/json", "Authorization": "OAuth " + session_uuid}
    response = requests.post(url, data, headers=headers)
    offer_uuid = deal_response(response, True)
    if offer_uuid:
        return offer_uuid


# 处理返回数据
def deal_response(response, is_return):
    if response:
        rsp = json.loads(response.text)
        if rsp:
            print('rsp : {%s}' % rsp)
            json_str = query_until_done(rsp)
            if json_str:
                if not json_str.has_key('error'):
                    if is_return:
                        return json_str['inventory']['uuid']
                    else:
                        return True
    return False


# 轮询查询API结果
def query_until_done(rsp):
	# 截取任务id, 替换请求地址
        if rsp.has_key('location'):
        location = rsp['location']
        job_uuid = location.split('/')[-1]
        if job_uuid:
            while True:
                url = host + "zstack/v1/api-jobs/" + location.split('/')[-1]
                response = requests.get(url)
                text = response.text
                print(text)
                if text != '{}':
                    print('url : {%s}' % url)
                    return json.loads(text)


if __name__ == '__main__':
	session_uuid = login()
	if session_uuid:
		# 创建计算规格
        instance_uuid = create_instance_offerings(session_uuid)