aws 通過boto3 python指令碼打pach的實現方法
阿新 • • 發佈:2020-05-11
指令碼要實現的功能:輸入instance id
1:將所有的volume take snapshot
2: 獲取public ip 並登陸機器執行 ps 命令記錄patch前程序狀態已經埠狀態
3:獲取機器所在的elb
4: 從elb中移除當前機器
5:檢查snapshots是否完成
6:snapshots完成後patching
7: patching完成後將instance加回到elb
#!/usr/bin/python # vim: expandtab:tabstop=4:shiftwidth=4 ''' script to get ecr info ''' # Reason: disable invalid-name because pylint does not like our naming convention # pylint: disable=invalid-name import time import boto3 import sys import argparse def get_volume(ec2,instanceId): result = [] instance = ec2.Instance(instanceId) volumes = instance.volumes.all() for volume in volumes: print("Volume attached to this instance is :" + volume.id) result.append(volume.id) return result def take_snapByInstance(client,instanceId): response = client.create_snapshots( Description='string',InstanceSpecification={ 'InstanceId': instanceId,'ExcludeBootVolume': False },TagSpecifications=[ { 'ResourceType': 'snapshot','Tags': [ { 'Key': 'orginName','Value': 'patch backup'+ instanceId },] },],DryRun=False,CopyTagsFromSource='volume' ) print("Creating new snapshots for instances:" + response['Snapshots'][0]['SnapshotId']) return response['Snapshots'][0]['SnapshotId'] def get_publicIp(ec2,instanceId): instance = ec2.Instance(instanceId) publicIp = instance.public_ip_address return publicIp def take_screenshotOfProcess(public_ip): print("Please run this command on your local machine") print('ssh -t ' + public_ip + ' "sudo netstat -tnpl > disk.listen"') print('ssh -t ' + public_ip + ' "sudo ps auxf > disk.ps"') def get_elbInfo(client_elb,ec2,instanceId): bals = client_elb.describe_load_balancers() for elb in bals['LoadBalancerDescriptions']: #print('ELB DNS Name : ' + elb['DNSName']) #check if the elb is the elb of instance if instanceId in elb['Instances']: print("found elb " + elb['DNSName']) else: pass def remove_fromElb(client_elb,elb,instanceId): response = client_elb.deregister_instances_from_load_balancer( LoadBalancerName='elb',Instances=[ { 'InstanceId': instanceId },] ) def add_backElb(client_elb,instanceId): response = client.register_instances_with_load_balancer( LoadBalancerName= elb,] ) def check_snapStatus(ec2,snaps): snapshot = ec2.Snapshot(snaps) snapshot.load() print(snapshot.state) return snapshot.state def main(ec2,client,instanceId,client_elb): print("going to paching instanceid: " + instanceId) #get volumes volumes = get_volume(ec2,instanceId) #get public ip public_ip = get_publicIp(ec2,instanceId) #take snapshot snaps = take_snapByInstance(client,instanceId) #take screenshot of procss and port take_screenshotOfProcess(public_ip) #get elb info elb = False #elb = get_elbInfo(client_elb,instanceId) #remove from elb if elb: ans_remove = input("Are you sure to remove the instance from the elb now? Yes/No") if ans_remove == 'Yes': #remove from instance remove_fromElb(client_elb,instanceId) #check snapshot status snapshotStatus = '' check_snapStatus(ec2,snaps) print("checking staus of snapshots") while True: snapshotStatus = check_snapStatus(ec2,snaps) print(snapshotStatus) if snapshotStatus == 'completed': break else: time.sleep(10) #paching paching_cmd = 'Your paching command' print(paching_cmd) #add to elb if elb: ans_add = input("please confirm the patching is over,input yes to continue") if ans_add == 'Yes': add_backElb(client_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,'i-abcasdfa111122',client_elb)
注意,本指令碼並未包含連結機器並執行命令的部分,僅僅是打印出命令,需要手動執行 take_screenshotOfProcess
已經patch的命令,此部分也參考之前的文章,完全自動化,不需要手動執行
另外Patch命令指令碼中並未給出
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