Bulk AWS instances termination

terminate.sh

#!/usr/bin/env bash
# Created by Mohammad AlJolani <[email protected]>
# Github Gist : https://gist.github.com/mohammadjolani/0d29a4b52a493939ad1d2234173555ad

# Termination instances ids should be stored in a file line by line like
# i-05e31789b5688e970
# i-0999e3c0b69e5c81a


LOG_PATH="logs"
RUN_LOG="${LOG_PATH}/termination.log"
S_LOG="${LOG_PATH}/success_instances.log"
F_LOG="${LOG_PATH}/failed_instances.log"
PROGRESS_BAR=0

mkdir -p $LOG_PATH
cat /dev/null >> $RUN_LOG
cat /dev/null >> $S_LOG
cat /dev/null >> $F_LOG


TARGET_SIZE=$(wc -l $1 | awk '{print $1}' )
PROGRESS_BAR_PERCENT=$(echo "scale=2; 100/${TARGET_SIZE}" | bc)

ceil() {
  echo "define ceil (x) {if (x<0) {return x/1} \
        else {if (scale(x)==0) {return x} \
        else {return x/1 + 1 }}} ; ceil($1)" | bc
}

prog() {
    local w=80 p=$(ceil ${1});  shift
    # create a string of spaces, then change them to dots
    printf -v dots "%*s" "$(( $p*$w/100 ))" ""; dots=${dots// /.};
    # print those dots on a fixed-width space plus the percentage etc.
    printf "\r\e[K|%-*s| %3d %% %s" "$w" "$dots" "$p" "$*";
}

cat $1 |  while read instance_id
do
    PROGRESS_BAR=$(echo "${PROGRESS_BAR}+${PROGRESS_BAR_PERCENT}" | bc)
    prog "${PROGRESS_BAR}" ${instance_id}
    aws ec2 terminate-instances --region="us-west-2" --instance-ids $instance_id >> $RUN_LOG 2>&1
    if [[ $? == 0 ]]
    then
        echo "${instance_id}" >> $S_LOG
   else
       echo "${instance_id}" >> $F_LOG
    fi
done