access_stack.sh

#!/bin/bash
#Author : Leegin Bernads

read -p "Enter the IAM user name : " user
arn = `aws iam get-user --user-name $user | grep Arn | cut -d ':' -f2,3,4,5,6,7 | tr -d ' ' |sed -e 's/^"//' -e 's/"$//'`

function get_stackname()
{
#With the insatnce id we are getting the instance ip with which the stack name of these instances is gathered in this function.
	for i in `cat instanceids.txt`
	do
		aws ec2 describe-instances --instance-id $i  --query 'Reservations[].Instances[].PrivateIpAddress' |grep "\"" |  cut -d"\"" -f2 >> instancesip.txt
		aws ec2 describe-instances --instance-id $i --query 'Reservations[].Instances[].[Tags[?Key==`opsworks:stack`].Value | [0]]' | grep "\"" | cut -d "\"" -f2 >> stacknames.txt
	done
}

function grant_access_default()
{
#In this function we are getting the stack id of the opsworks stacks in the default region "ap-southeast-1" from the stack names and granting access to the user for all the stacks.
	aws opsworks describe-stacks >> output.txt
	for i in `cat stacknames.txt`
	do 
		cat output.txt | grep -B 50 $i | grep "StackId" | cut -d ':' -f2 | cut -d "," -f1 | tr -d ' ' |sed -e 's/^"//' -e 's/"$//' >> stackids.txt
	done
	for i in `cat stackids.txt`
	do
		aws opsworks set-permission --stack-id $i --level iam_only  --iam-user-arn $arn --allow-ssh --allow-sudo
	done	
}

function grant_access_us_east()
{
#Again in this function we are getting the stack id of the opsworks stacks in the region us-east-1 from the stack names and granting access to the user for all the stacks.
	aws opsworks describe-stacks --region us-east-1 >> output1.txt
	for i in `cat stacknames.txt`
	do 
		cat output1.txt | grep -B 50 $i | grep "StackId" | cut -d ':' -f2 | cut -d "," -f1 | tr -d ' ' |sed -e 's/^"//' -e 's/"$//' >> stackids1.txt
	done
	for i in `cat stackids1.txt`
	do
		aws opsworks set-permission --region us-east-1 --stack-id $i --level iam_only  --iam-user-arn $arn --allow-ssh --allow-sudo
	done
}

if [[ -e instanceids.txt ]]
then
	get_stackname
	grant_access_default
	grant_access_us_east
fi