A basic boto3 based tool for retrieving information from running EC2 instances.

ec2_info_retriever.py

from collections import defaultdict

import boto3

"""
A tool for retrieving basic information from the running EC2 instances.
"""

# Connect to EC2
ec2 = boto3.resource('ec2')

# Get information for all running instances
running_instances = ec2.instances.filter(Filters=[{
    'Name': 'instance-state-name',
    'Values': ['running']}])

ec2info = defaultdict()
for instance in running_instances:
    for tag in instance.tags:
        if 'Name'in tag['Key']:
            name = tag['Value']
    # Add instance info to a dictionary         
    ec2info[instance.id] = {
        'Name': name,
        'Type': instance.instance_type,
        'State': instance.state['Name'],
        'Private IP': instance.private_ip_address,
        'Public IP': instance.public_ip_address,
        'Launch Time': instance.launch_time
        }

attributes = ['Name', 'Type', 'State', 'Private IP', 'Public IP', 'Launch Time']
for instance_id, instance in ec2info.items():
    for key in attributes:
        print("{0}: {1}".format(key, instance[key]))
    print("------")

As @ikekim said this will not work properly if instance.tags has more than one tag with a value which has 'Name` as a substring, e.g.

>>> 'Name' in 'NameOfEmployee'
True
>>> 'name' in 'dog'
False
>>> 'Name' in 'Names'

I used

if tag['Key'] == 'Name'
...

...because if you examine the instance.tags list of dicts there is only one 'Key' with a value of 'Name'

Hola buen dia tengo una duda, como podria obtener el nombre de la instancia ?

Thanks a lot!!

@TacMechMonkey, is there anyway we can filter Instance Status for specific VPCID? resource does not have status option.

running_instances = ec2.instances.filter(
Filters=[{
'Name': 'instance-status.status',
'Values': ['impaired']
},
{
'Name': 'vpc-id',
'Values': [vpc]
}]
)

@nakkanar you're on the right track, you'll have to use the ec2 client:
https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/ec2.html#EC2.Client.describe_instance_status

Yeah you can specify the region in the constructor, but just in case what do you mean by services ? or what you wanted to say was instances.

…

On Mon, May 17, 2021 at 3:11 PM code_.blooded ***@***.***> wrote: ***@***.**** commented on this gist. ------------------------------ Is there any way to list all the running services in a particular region using boto3? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <https://gist.github.com/b4994c605f76d528d0c4#gistcomment-3745658>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AJRMQGMU4OQT2BQH2QSFOTTTOEPYPANCNFSM4HPTH6SQ> .

you can use something like this and put in lambda. This will give you all the asg based on a name/tag you provide , list all the instance id's and then you can get things like IP/key etc on the id's

import boto3

client = boto3.client('autoscaling')
clientips=boto3.client('ec2')
paginator = client.get_paginator('describe_auto_scaling_groups')
page_iterator = paginator.paginate(
   PaginationConfig = {
      'PageSize': 100
   }
)

def lambda_handler(event, context):

   filtered_asgs = page_iterator.search(
      'AutoScalingGroups[] | [?contains(Tags[?Key==`{}`].Value, `{}`)]'.format('type', 'node')
   )

   for asg in filtered_asgs:
      print (asg['AutoScalingGroupName'])
      response = client.describe_auto_scaling_groups(
             AutoScalingGroupNames=[
        asg['AutoScalingGroupName'],
      ],
      )
      instances=response["AutoScalingGroups"][0]["Instances"]
      instanceids=[]
      for i in instances:
         instanceids.append(i["InstanceId"])
         instaneips=[]
         reservations = clientips.describe_instances(InstanceIds=[i['InstanceId']]).get("Reservations")
         for reservation in reservations:
            for instance in reservation['Instances']:
               print(instance.get("PublicIpAddress"))