aws 通过boto3 python脚本打pach的实现方法
脚本要实现的功能：输入instanceid
1：将所有的volumetakesnapshot
2: 获取publicip并登陆机器执行ps命令记录patch前进程状态已经端口状态
3：获取机器所在的elb
4: 从elb中移除当前机器
5：检查snapshots是否完成
6：snapshots完成后patching
7: patching完成后将instance加回到elb
#!/usr/bin/python
#vim:expandtab:tabstop=4:shiftwidth=4
'''scripttogetecrinfo'''
#Reason:disableinvalid-namebecausepylintdoesnotlikeournamingconvention
#pylint:disable=invalid-name
importtime
importboto3
importsys
importargparse
defget_volume(ec2,instanceId):
result=[]
instance=ec2.Instance(instanceId)
volumes=instance.volumes.all()
forvolumeinvolumes:
print("Volumeattachedtothisinstanceis:"+volume.id)
result.append(volume.id)
returnresult
deftake_snapByInstance(client,instanceId):
response=client.create_snapshots(
Description='string',
InstanceSpecification={
'InstanceId':instanceId,
'ExcludeBootVolume':False
},
TagSpecifications=[
{
'ResourceType':'snapshot',
'Tags':[
{
'Key':'orginName',
'Value':'patchbackup'+instanceId
},
]
},
],
DryRun=False,
CopyTagsFromSource='volume'
)
print("Creatingnewsnapshotsforinstances:"+response['Snapshots'][0]['SnapshotId'])
returnresponse['Snapshots'][0]['SnapshotId']
defget_publicIp(ec2,instanceId):
instance=ec2.Instance(instanceId)
publicIp=instance.public_ip_address
returnpublicIp
deftake_screenshotOfProcess(public_ip):
print("Pleaserunthiscommandonyourlocalmachine")
print('ssh-t'+public_ip+'"sudonetstat-tnpl>disk.listen"')
print('ssh-t'+public_ip+'"sudopsauxf>disk.ps"')
defget_elbInfo(client_elb,ec2,instanceId):
bals=client_elb.describe_load_balancers()
forelbinbals['LoadBalancerDescriptions']:
#print('ELBDNSName:'+elb['DNSName'])
#checkiftheelbistheelbofinstance
ifinstanceIdinelb['Instances']:
print("foundelb"+elb['DNSName'])
else:
pass
defremove_fromElb(client_elb,elb,instanceId):
response=client_elb.deregister_instances_from_load_balancer(
LoadBalancerName='elb',
Instances=[
{
'InstanceId':instanceId
},
]
)
defadd_backElb(client_elb,elb,instanceId):
response=client.register_instances_with_load_balancer(
LoadBalancerName=elb,
Instances=[
{
'InstanceId':instanceId
},
]
)
defcheck_snapStatus(ec2,snaps):
snapshot=ec2.Snapshot(snaps)
snapshot.load()
print(snapshot.state)
returnsnapshot.state
defmain(ec2,client,instanceId,client_elb):
print("goingtopachinginstanceid:"+instanceId)
#getvolumes
volumes=get_volume(ec2,instanceId)
#getpublicip
public_ip=get_publicIp(ec2,instanceId)
#takesnapshot
snaps=take_snapByInstance(client,instanceId)
#takescreenshotofprocssandport
take_screenshotOfProcess(public_ip)
#getelbinfo
elb=False
#elb=get_elbInfo(client_elb,ec2,instanceId)
#removefromelb
ifelb:
ans_remove=input("Areyousuretoremovetheinstancefromtheelbnow?Yes/No")
ifans_remove=='Yes':
#removefrominstance
remove_fromElb(client_elb,elb,instanceId)
#checksnapshotstatus
snapshotStatus=''
check_snapStatus(ec2,snaps)
print("checkingstausofsnapshots")
whileTrue:
snapshotStatus=check_snapStatus(ec2,snaps)
print(snapshotStatus)
ifsnapshotStatus=='completed':
break
else:
time.sleep(10)
#paching
paching_cmd='Yourpachingcommand'
print(paching_cmd)
#addtoelb
ifelb:
ans_add=input("pleaseconfirmthepatchingisover,inputyestocontinue")
ifans_add=='Yes':
add_backElb(client_elb,elb,instanceId)
if__name__=="__main__":
ec2=boto3.resource('ec2',region_name='us-east-1')
client=boto3.client('ec2',region_name='us-east-1')
client_elb=boto3.client('elb',region_name='us-east-1')
main(ec2,client,'i-abcasdfa111122',client_elb)
注意，本脚本并未包含链接机器并执行命令的部分，仅仅是打印出命令，需要手动执行take_screenshotOfProcess已经patch的命令，此部分也参考之前的文章，完全自动化，不需要手动执行
另外Patch命令脚本中并未给出
总结
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