本文介绍如何使用函数计算控制台编写函数,以实现ECS重启后,函数自动查找出ECS挂接的云盘,并给云盘自动创建快照。
本文以Python为例,示例代码如下。
# -*- coding: utf-8 -*-
import logging
import json, random, string, time
from aliyunsdkcore import client
from aliyunsdkecs.request.v20140526.DeleteSnapshotRequest import DeleteSnapshotRequest
from aliyunsdkecs.request.v20140526.CreateSnapshotRequest import CreateSnapshotRequest
from aliyunsdkecs.request.v20140526.DescribeDisksRequest import DescribeDisksRequest
from aliyunsdkcore.auth.credentials import StsTokenCredential
LOGGER = logging.getLogger()
clt = None
def handler(event, context):
creds = context.credentials
sts_token_credential = StsTokenCredential(creds.access_key_id, creds.access_key_secret, creds.security_token)
'''
{
"product": "ECS",
"content": {
"executeFinishTime": "2018-06-08T01:25:37Z",
"executeStartTime": "2018-06-08T01:23:37Z",
"ecsInstanceName": "timewarp",
"eventId": "e-t4nhcpqcu8fqushpn3mm",
"eventType": "InstanceFailure.Reboot",
"ecsInstanceId": "i-bp18l0uopocfc98xxxx"
},
"resourceId": "acs:ecs:cn-hangzhou:12345678:instance/i-bp18l0uopocfc98xxxx",
"level": "CRITICAL",
"instanceName": "instanceName",
"status": "Executing",
"name": "Instance:SystemFailure.Reboot:Executing",
"regionId": "cn-hangzhou"
}
'''
evt = json.loads(event)
content = evt.get("content");
ecsInstanceId = content.get("ecsInstanceId");
regionId = evt.get("regionId");
global clt
clt = client.AcsClient(region_id=regionId, credential=sts_token_credential)
name = evt.get("name");
name = name.lower()
if name in [ 'Instance:SystemFailure.Reboot:Executing'.lower(), "Instance:InstanceFailure.Reboot:Executing".lower()]:
pass
# do other things
if name in ['Instance:SystemFailure.Reboot:Executed'.lower(), "Instance:InstanceFailure.Reboot:Executed".lower()]:
request = DescribeDisksRequest()
request.add_query_param("RegionId", regionId)
request.set_InstanceId(ecsInstanceId)
response = _send_request(request)
disks = response.get('Disks').get('Disk', [])
for disk in disks:
diskId = disk["DiskId"]
SnapshotId = create_ecs_snap_by_id(diskId)
LOGGER.info("Create ecs snap sucess, ecs id = %s , disk id = %s ", ecsInstanceId, diskId)
def create_ecs_snap_by_id(disk_id):
LOGGER.info("Create ecs snap, disk id is %s ", disk_id)
request = CreateSnapshotRequest()
request.set_DiskId(disk_id)
request.set_SnapshotName("reboot_" + ''.join(random.choice(string.ascii_lowercase) for _ in range(6)))
response = _send_request(request)
return response.get("SnapshotId")
# send open api request
def _send_request(request):
request.set_accept_format('json')
try:
response_str = clt.do_action_with_exception(request)
LOGGER.info(response_str)
response_detail = json.loads(response_str)
return response_detail
except Exception as e:
LOGGER.error(e)
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