Forked from brauliobo/delete_unused_launch_configurations.sh
Created
March 1, 2017 14:30
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Delete unused Launch Configuration. Based on http://www.markomedia.com.au/delete-launch-config-programatically-aws/
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#!/bin/bash | |
# | |
# based on https://gist.github.com/brauliobo/d3692d3ac5eb8b00e863 | |
# our version handle spaces and other chars we use in the launch configuration | |
# | |
BOLD="\e[1m" | |
RESET="\e[0m" | |
GREEN="\e[32m" | |
RED="\e[31m" | |
IFS=$'\n' | |
# called when the launch configuration is still in used | |
keep() { | |
# remove quotes | |
local lc_name=$(echo "$1" | sed s/\"//g ) | |
echo -e "${BOLD}${GREEN}✔${RESET} ${lc_name}" | |
} | |
# called when the launch configuration is no longer in use, and should be deleted | |
delete() { | |
# remove quotes | |
local lc_name=$(echo "$1" | sed s/\"//g ) | |
echo -e "${BOLD}${RED}✘${RESET} ${lc_name}" | |
aws autoscaling delete-launch-configuration --launch-configuration-name "${lc_name}" | |
} | |
# Check if a value exists in an array | |
# @param $1 mixed Needle | |
# @param $2 array Haystack | |
# @return Success (0) if value exists, Failure (1) otherwise | |
# Usage: in_array "$needle" "${haystack[@]}" | |
# See: http://fvue.nl/wiki/Bash:_Check_if_array_element_exists | |
in_array() { | |
local hay needle=$1 | |
shift | |
for hay; do | |
[[ "$hay" == "$needle" ]] && return 0 | |
done | |
return 1 | |
} | |
# Get all launch configuration names that have been created for this AWS account | |
echo "aws autoscaling describe-launch-configurations" | |
allconfigs=$(aws autoscaling describe-launch-configurations | jq '.LaunchConfigurations[].LaunchConfigurationName' | grep -v null) | |
configs=($allconfigs) | |
# Get all active launch configurations names that are currently associated with running instances | |
echo "aws autoscaling describe-auto-scaling-instances" | |
allinstances=$(aws autoscaling describe-auto-scaling-instances | jq '.AutoScalingInstances[].LaunchConfigurationName' | grep -v null) | |
instances=($allinstances) | |
# Get all active launch configuration names that are currently associated with launch configuration groups | |
echo "aws autoscaling describe-auto-scaling-groups" | |
allgroups=$(aws autoscaling describe-auto-scaling-groups | jq '.AutoScalingGroups[].LaunchConfigurationName' | grep -v null) | |
groups=($allgroups) | |
# merge group configs and active instances configs into one array. We need to keep them, and remove the rest | |
groupsandinstances=(`for R in "${instances[@]}" "${groups[@]}" ; do echo "$R" ; done | sort -du`) | |
# Loop through all configs and check against active ones to determine whether they need to be deleted | |
for i in "${configs[@]}" | |
do | |
in_array "$i" "${groupsandinstances[@]}" && keep "${i}" || delete "${i}" | |
done |
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