aws 通过boto3 python脚本打pach的实现方法

脚本要实现的功能：输入instance id

1：将所有的volume take snapshot

2:  获取public ip 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
''' 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, elb, instanceId):
  response = client.register_instances_with_load_balancer(
    LoadBalancerName= elb,
    Instances=[
      {
 'InstanceId': instanceId
      },
    ]
  )
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, ec2, 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, 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, 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

到此这篇关于aws 通过boto3 python脚本打pach的实现方法的文章就介绍到这了,更多相关aws 通过boto3 python脚本打pach内容请搜索考高分网以前的文章或继续浏览下面的相关文章希望大家以后多多支持考高分网！