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,