AWS CLI command list for checking limits? - bash

Question

I'm working on a project where a single section of our deployment pipeline can easily take up to an hour to deploy onto AWS. We have about 30 steps in our pipeline and one of the primary time killers of spinning up a new environment is hitting a random limit in AWS. I've searched their website for checking limits and have found a few select commands for specific environments, but are there commands (and if so, a list of them) that can check for each limit such as 'NatGatewayLimitExceeded' for example? It would be great if I could make a script that checked all of our limits before we wasted time spinning up half an instance to be blocked by something like this. Thank you in advance!

Answer 1

From here they say that if you have AWS Premium Support, you can do this:
CHECK_ID=$(aws --region us-east-1 support describe-trusted-advisor-checks \
--language en --query 'checks[?name==`Service Limits`].{id:id}[0].id' \
--output text)
aws support describe-trusted-advisor-check-result --check-id "$CHECK_ID" \
--query 'result.sort_by(flaggedResources[?status!="ok"],&metadata[2])[].metadata' \
--output table --region us-east-1
If you do not have AWS Premium Support, I hacked together this:
awscommands=($(COMP_LINE='aws' aws_completer))
for command in "${awscommands[#]}"; do COMP_LINE="aws $command" \
aws_completer | xargs -n1 -I% printf "aws $command %\n"; done | grep limit | \
bash 2>/dev/null
This uses AWS's own bash completion program to find all possible aws commands (mutatis mutandis for your environment), and then all subcommands of those commands that have "limit" in their name, and then runs them. Some of those "limit" subcommands have required options; my trick does not account for those and they just error out, so I redirected stderr to /dev/null. Therefore the results are incomplete. Suggestions for improvement are welcome.