[英]Getting a list of instances in an EC2 auto scale group?
Is there a utility or script available to retrieve a list of all instances from AWS EC2 auto scale group?是否有实用程序或脚本可用于从 AWS EC2 自动缩放组检索所有实例的列表?
I need a dynamically generated list of production instance to hook into our deploy process.我需要一个动态生成的生产实例列表来连接到我们的部署过程。 Is there an existing tool or is this something I am going to have to script?是否有现有的工具或者这是我必须编写的脚本?
Here is a bash command that will give you the list of IP addresses of your instances in an AutoScaling group.这是一个 bash 命令,它将为您提供 AutoScaling 组中实例的 IP 地址列表。
for ID in $(aws autoscaling describe-auto-scaling-instances --region us-east-1 --query AutoScalingInstances[].InstanceId --output text);
do
aws ec2 describe-instances --instance-ids $ID --region us-east-1 --query Reservations[].Instances[].PublicIpAddress --output text
done
(you might want to adjust the region and to filter per AutoScaling group if you have several of them) (如果您有多个 AutoScaling 组,您可能需要调整区域并过滤每个 AutoScaling 组)
On a higher level point of view - I would question the need to connect to individual instances in an AutoScaling Group.从更高层次的角度来看 - 我会质疑连接到 AutoScaling 组中的单个实例的必要性。 The dynamic nature of AutoScaling would encourage you to fully automate your deployment and admin processes. AutoScaling 的动态特性会鼓励您完全自动化您的部署和管理流程。 To quote an AWS customer : "If you need to ssh to your instance, change your deployment process"引用 AWS 客户的话:“如果您需要 ssh 到您的实例,请更改您的部署过程”
--Seb --塞伯
The describe-auto-scaling-groups command from the AWS Command Line Interface looks like what you're looking for. AWS 命令行界面中的describe-auto-scaling-groups命令看起来像您要查找的内容。
Edit: Once you have the instance IDs, you can use the describe-instances command to fetch additional details, including the public DNS names and IP addresses.编辑:获得实例 ID 后,您可以使用describe-instances命令获取其他详细信息,包括公共 DNS 名称和 IP 地址。
You can use the describe-auto-scaling-instances
cli command, and query for your autoscale group name.您可以使用describe-auto-scaling-instances
cli 命令,并查询您的自动缩放组名称。
Example:例子:
aws autoscaling describe-auto-scaling-instances --region us-east-1 --query 'AutoScalingInstances[?AutoScalingGroupName==`YOUR_ASG`]' --output text aws autoscaling describe-auto-scaling-instances --region us-east-1 --query 'AutoScalingInstances[?AutoScalingGroupName==`YOUR_ASG`]' --output text
Hope that helps希望有帮助
You can also use below command to fetch private ip address without any jq/awk/sed/cut您也可以使用以下命令来获取私有 IP 地址,而无需任何 jq/awk/sed/cut
$ aws autoscaling describe-auto-scaling-instances --region us-east-1 --output text \
--query "AutoScalingInstances[?AutoScalingGroupName=='ASG-GROUP-NAME'].InstanceId" \
| xargs -n1 aws ec2 describe-instances --instance-ids $ID --region us-east-1 \
--query "Reservations[].Instances[].PrivateIpAddress" --output text
I actually ended up writing a script in Python because I feel more comfortable in Python then Bash,我实际上最终用 Python 编写了一个脚本,因为我觉得 Python 比 Bash 更舒服,
#!/usr/bin/env python
"""
ec2-autoscale-instance.py
Read Autoscale DNS from AWS
Sample config file,
{
"access_key": "key",
"secret_key": "key",
"group_name": "groupName"
}
"""
from __future__ import print_function
import argparse
import boto.ec2.autoscale
try:
import simplejson as json
except ImportError:
import json
CONFIG_ACCESS_KEY = 'access_key'
CONFIG_SECRET_KEY = 'secret_key'
CONFIG_GROUP_NAME = 'group_name'
def main():
arg_parser = argparse.ArgumentParser(description=
'Read Autoscale DNS names from AWS')
arg_parser.add_argument('-c', dest='config_file',
help='JSON configuration file containing ' +
'access_key, secret_key, and group_name')
args = arg_parser.parse_args()
config = json.loads(open(args.config_file).read())
access_key = config[CONFIG_ACCESS_KEY]
secret_key = config[CONFIG_SECRET_KEY]
group_name = config[CONFIG_GROUP_NAME]
ec2_conn = boto.connect_ec2(access_key, secret_key)
as_conn = boto.connect_autoscale(access_key, secret_key)
try:
group = as_conn.get_all_groups([group_name])[0]
instances_ids = [i.instance_id for i in group.instances]
reservations = ec2_conn.get_all_reservations(instances_ids)
instances = [i for r in reservations for i in r.instances]
dns_names = [i.public_dns_name for i in instances]
print('\n'.join(dns_names))
finally:
ec2_conn.close()
as_conn.close()
if __name__ == '__main__':
main()
The answer at https://stackoverflow.com/a/12592543/20774 was helpful in developing this script. https://stackoverflow.com/a/12592543/20774 上的答案有助于开发此脚本。
Use the below snippet for sorting out ASGs with specific tags and listing out its instance details.使用以下代码段整理具有特定标签的 ASG 并列出其实例详细信息。
#!/usr/bin/python
import boto3
ec2 = boto3.resource('ec2', region_name='us-west-2')
def get_instances():
client = boto3.client('autoscaling', region_name='us-west-2')
paginator = client.get_paginator('describe_auto_scaling_groups')
groups = paginator.paginate(PaginationConfig={'PageSize': 100})
#print groups
filtered_asgs = groups.search('AutoScalingGroups[] | [?contains(Tags[?Key==`{}`].Value, `{}`)]'.format('Application', 'CCP'))
for asg in filtered_asgs:
print asg['AutoScalingGroupName']
instance_ids = [i for i in asg['Instances']]
running_instances = ec2.instances.filter(Filters=[{}])
for instance in running_instances:
print(instance.private_ip_address)
if __name__ == '__main__':
get_instances()
for ruby using aws-sdk gem v2 First create ec2 object as this:对于使用 aws-sdk gem v2 的 ruby 首先创建 ec2 对象,如下所示:
ec2 = Aws::EC2::Resource.new(region: 'region', credentials: Aws::Credentials.new('IAM_KEY', 'IAM_SECRET') ) ec2 = Aws::EC2::Resource.new(region: 'region', 凭证: Aws::Credentials.new('IAM_KEY', 'IAM_SECRET') )
instances = []实例 = []
ec2.instances.each do |i|
p "instance id---", i.id
instances << i.id
end结尾
This will fetch all instance ids in particular region and can use more filters like ip_address.这将获取特定区域的所有实例 ID,并可以使用更多过滤器,如 ip_address。
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