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subnets

List all AWS VPCs or subnets with theirs tags and list them using jquery

Example AWS cli command with listing using [.jq(https://jqlang.github.io/jq/)].

This commands list all AWS VPCs within the account with their VpcId, CidrBlock and their Tags.

aws ec2 describe-vpcs | jq -r '.Vpcs[] | "\(.VpcId) \t \(.CidrBlock) \t \(.Tags[])" '

It is also possible to "select" a specific Tags.

aws ec2 describe-vpcs | jq -r '.Vpcs[] | "\(.VpcId) \t \(.CidrBlock) \t \(.Tags[] | select(.Key == "Application") | .Value)" '

example, select VPC name and sort by VPC name.

aws ec2 describe-vpcs | jq -r '.Vpcs[] | "\(.VpcId) \t \(.CidrBlock) \t \(.Tags[] | select(.Key == "Name")| .Value)" ' | sort -nk2

documentation for https://awscli.amazonaws.com/v2/documentation/api/latest/reference/ec2/describe-vpcs.html


List all Subnets with filter .key, .value data that I picked.

the sort -nk5 at the end, put on put the subnet with the least number of available IPs, taken from .AvailableIpAddressCount.

aws ec2 describe-subnets | jq -r '.Subnets[] | "\(.AvailabilityZone); \(.AvailabilityZoneId); \(.VpcId); \(.CidrBlock); \t \(.AvailableIpAddressCount); \t \(.Tags[] | select(.Key == "Name")| .Value)  "  ' | sort -nk5

documentation for https://awscli.amazonaws.com/v2/documentation/api/latest/reference/ec2/describe-subnets.html


Next, why not rotate through other AWS accounts in the Org if you have them?! and rotate through regions?! :)

I have been there, done that, so leave the challenge for you :)


Happy learning,

Antonio Feijao UK