【发布时间】：2017-07-28 03:52:10
【问题描述】：
致力于让这个脚本从早期版本 2 开始在 Python 3 上运行，但仍然遇到一些回溯和属性错误。下面是错误，下面是当前状态的脚本：特别感谢 @Madlania Kalunder 对打印问题进行排序。现在我知道事情已接近尾声，但需要一些帮助。
Traceback (most recent call last):
File "ec2-instances.py", line 97, in <module> sys.exit(main())
File "ec2-instances.py", line 78, in main hosts=(list_instances)(filter)
File "ec2-instances.py", line 18, in list_instances
name = (item for item in i.tags if item ["Key"] == "Name" ).next()
AttributeError: 'generator' object has no attribute 'next'
下面是代码。很抱歉在这里出现格式问题，并提前感谢您的帮助。
#!/usr/bin/env python
import boto3
import sys
import argparse
import paramiko
def list_instances(Filter):
ec2 = boto3.resource('ec2')
instances = ec2.instances.filter(Filters=Filter)
(columns_format) = ("%-3s %-26s %-16s %-16s %-20s %-12s %-12s %-16s")
print ((columns_format) % ("num", "Name", "Public IP", "Private IP", "ID", "Type", "VPC", "Status"))
num = 1
hosts = []
name = {}
for i in instances:
try:
name = (item for item in i.tags if item ["Key"] == "Name" ).next()
except StopIteration:
name['Value'] = ''
print (columns_format) % (
num,
name['Value'],
i.public_ip_address,
i.private_ip_address,
i.id,
i.instance_type,
i.vpc_id,
i.state['Name']
)
num = num + 1
item={'id': i.id, 'ip': i.public_ip_address, 'hostname': name ['Value'], 'status': i.state['Name'],}
hosts.append(item)
return hosts
def execute_cmd(host,user,cmd):
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
try:
ssh.connect(host, username=user)
stdin, stdout, stderr = ssh.exec_command(cmd)
stdout=stdout.read()
stderr=stderr.read()
ssh.close()
return stdout,stderr
except paramiko.AuthenticationException as exception:
return "Authentication Error trying to connect into the host %s with the user %s. Plese review your keys" % (host, user), e
def main():
parser = argparse.ArgumentParser()
parser.add_argument('-n', '--name',
help="Filter result by name.")
parser.add_argument('-t', '--type',
help="Filer result by type.")
parser.add_argument('-s', '--status',
help="Filter result by status." )
parser.add_argument('-e', '--execute',
help="Execute a command on instances")
parser.add_argument('-u', '--user', default="ubuntu",
help="User to run commands if -e option is used.\
Ubuntu user is used by default")
arg = parser.parse_args()
# Default filter if no options are specified
filter=[]
if arg.name:
filter.append({'Name': 'tag-value', 'Values': ["*" + arg.name + "*"]})
if arg.type:
filter.append({'Name': 'instance-type', 'Values': ["*" + arg.type + "*"]})
if arg.status:
filter.append({'Name': 'instance-state-name', 'Values': ["*" + arg.status + "*"]})
hosts=list_instances(filter)
names = ""
if arg.execute:
for item in hosts:
names = names + " " + item["hostname"] + "(" + item["id"] + ")"
print ("\nCommand to execute: %s") % arg.execute
print ("Executed by: %s") % arg.user
print ("Hosts list: %s\n") % names
for item in hosts:
if item["status"] == 'running':
print ("::: %s (%s)") % (item["hostname"], item["id"])
stdout,stderr = execute_cmd(item["ip"], arg.user, arg.execute)
print (stdout)
print (stderr)
else:
print ("::: %s (%s) is not running (command execution skiped)") % (item["hostname"], item["id"])
if __name__ == '__main__':
sys.exit(main())
【问题讨论】：
标签： python-3.x amazon-ec2 boto3