How would you go about listing instances using aws cli in certain VPC with the Tag Name, private IP address of instance and instance id

aws-cli

The closest I have get is using the following commands.

This command manage to lists all name of instances.

aws ec2 describe-instances --filters Name=vpc-id,Values=vpc-e2f17e8b --query 'Reservations[].Instances[].Tags[?Key==`Name`].Value[]'

This command manage to list all private ip address, instance id and ALL tags which I don't need. I just need the name.

aws ec2 describe-instances --filters Name=vpc-id,Values=vpc-e2f17e8b | jq '.Reservations[].Instances[] | {PrivateIpAddress, InstanceId, Tags}'

I'm not sure why I can't execute command like this way:

aws ec2 describe-instances | jq '.["Reservations"]|.[]|.Instances|.[]|.PrivateIpAddress + " " + .InstanceId + " " + .Tags[?Key==`Name`].Value[]'

This command works but its showing all the Tags Key names.

aws ec2 describe-instances | jq '.["Reservations"]|.[]|.Instances|.[]|.PrivateIpAddress + " " + .InstanceId + " " + .Tags'

Best Answer

You need to escape the backslashes in order to format the answer correctly.

aws ec2 describe-instances --query 'Reservations[].Instances[].[PrivateIpAddress,Tags[?Key==`Name`].Value[]]' --output text | sed '$!N;s/\n/ /'

So this is the actual command you want:

$ aws ec2 describe-instances --filters Name=vpc-id,Values=vpc-ac973bc9 --query 'Reservations[].Instances[].[PrivateIpAddress,InstanceId,Tags[?Key==`Name`].Value[]]' --output text | sed '$!N;s/\n/ /'
10.101.255.10   i-91efd39b Server1
10.101.255.9    i-f1e8d4fb Server2

And you don't need .Value[]. You can just use .Value, and that will give the same output.

This is awesome, btw. I will be implementing this myself!

CORRECTION: The above won't work if the value of .Value is "None". This works better:

$ aws ec2 describe-instances --filters Name=vpc-id,Values=vpc-ac973bc9 --query 'Reservations[].Instances[].[PrivateIpAddress,InstanceId,Tags[?Key==`Name`].Value[]]' --output text | sed 's/None$/None\n/' | sed '$!N;s/\n/ /'
10.101.255.10   i-91efd39b Server1
10.101.255.9    i-f1e8d4fb Server2
10.101.255.8    i-f6c2450a      None
10.101.255.7    i-34a6afce Server3

Related Solutions

How to add a Tag when launching an ec2 instance using aws clis

As of 28 March 2017, you can specify tags for instances (and attached volumes) as part of the run-instances command.

Example:

aws ec2 run-instances --image-id ami-abc12345 --count 1 \
--instance-type t2.micro --key-name MyKeyPair \
--subnet-id subnet-6e7f829e \
--tag-specifications 'ResourceType=instance,Tags=[{Key=webserver,Value=production}]' 'ResourceType=volume,Tags=[{Key=cost-center,Value=cc123}]'

Announcement blog post: https://aws.amazon.com/blogs/aws/new-tag-ec2-instances-ebs-volumes-on-creation/

Additional documentation (see example 4): http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/Using_Tags.html#Using_Tags_CLI

Command to list AWS instances that results in short output

Yes, via the --query option.

This option allows you to filter down and return specific elements from the structure. There is a special wildcard [*] notation that allows you to iterate over lists of objects; we'll use this to iterate over the list of EC2 instances and return your desired values.

Retrieving InstanceID, Instance Tag Name as JSON:

aws ec2 describe-instances --query 'Reservations[*].Instances[*].[InstanceId, Tags[?Key==`Name`].Value | [0]]'

[
    [
        [
            "i-abcd1234",
            "MyFirstInstance"
        ]
    ],
    [
        [
            "i-efgh5678",
            "MySecondInstance"
        ]
    ]
]

Retrieving InstanceID, Instance Tag Name as Text:

If you don't want to work with json, you can also add the --output option to output text:

aws ec2 describe-instances --query 'Reservations[*].Instances[*].[InstanceId, Tags[?Key==`Name`].Value | [0]]' --output text

i-abcd1234      MyFirstInstance
i-efgh5678      MySecondInstance

Best Answer

Related Solutions

How to add a Tag when launching an ec2 instance using aws clis

Command to list AWS instances that results in short output

Related Topic