AWS CLI - aws ec2 describe-instances to retrieve keypair mame for each EC2 instance

问题

I am trying to query keypair names that are attached to each EC2 instance, the ec2 describe-instances below works fine, it does exactly what I need, but the column under the {keypair.Name} displays [NONE] I am not sure if I am using the proper parameter name - I know there are few keypairNames.epm attached on my EC2 instances when I login to the console, but I am not seeing that on my report that I run by the command below. Any input is much appreciated.. Thx !

aws ec2 describe-instances --filters Name=instance-state-name,Values=running --query 'Reservations[].Instances[].[Tags[?Key==`Name`].Value | [0],InstanceId,Platform,State.Name,PrivateIpAddress,PublicIpAddress,InstanceType,PublicDnsName,keypair.Name]' --output table --region us-west-2

回答1:

There is no field called keypair in the Instances dictionary.

The closest is KeyName:

{
    "Reservations": [
        {
            "Instances": [
                {
                    "InstanceId": "i-xxx", 
                    "KeyName": "foo", 
...

Therefore, you would use:

aws ec2 describe-instances --filters Name=instance-state-name,Values=running --query 'Reservations[].Instances[].[Tags[?Key==`Name`].Value | [0],InstanceId,Platform,State.Name,PrivateIpAddress,PublicIpAddress,InstanceType,PublicDnsName,KeyName]'

See: describe-instances — AWS CLI Command Reference

回答2:

I did find a way to sort this out by using pipe. exp: | sort -k5

Please note, before I used {sort}, the report had {windows} and {None} allover the place under column PLATFORM. Please see attached, I uploaded a sample result of my report..

The new statement looks like this:

aws ec2 describe-instances --filters Name=instance-state-name,Values=running --query 'Reservations[].Instances[].[Tags[?Key==`Name`].Value | [0],InstanceId,Platform,State.Name,PrivateIpAddress,PublicIpAddress,InstanceType,KeyName]' --output table | sort -k5

Report shows that is sorted by PLATFORM IN Asc order

回答3:

I do the following for a few reasons

it can be easily piped to grep
you don't need to query aws api's repeatedly if you want to improve your data
I have multiple regions that I'm usually iterating through, so this makes it easy to scan through all regions (and accounts)

instances=`aws ec2 describe-instances `
echo $instances | jq '.Reservations[].Instances[] | "[\(.InstanceId) \(.Platform) \(.State.Name) \(.PrivateIpAddress) \(.PublicIpAddress) \(.InstanceType) \(.PublicDnsName) \(.KeyName)]"'

来源：https://stackoverflow.com/questions/54299615/aws-cli-aws-ec2-describe-instances-to-retrieve-keypair-mame-for-each-ec2-insta

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amazon-web-services

amazon-ec2

aws-cli