aws_domainNames_delete.sh

#!/usr/bin/env bash
# deletes domain names
###################
source colour_utils_functions.sh	 # to add colour to some messages

case $# in
    1) ;; ### continue below
    0|*) ### display message on use
	message "\n`colour gl $(basename $0)` deletes the domain names of the instances specified as below.

$(colour bl "Usage:                $(basename $0)  instancesNamesFile")

 - provide the full or relative path to the file containing the names of the instances whose 
   domain names will be deleted.
 - example:  $(colour bl "$(basename $0)  courses/genomics01/")$(colour r inputs)$(colour bl /instancesNames.txt)
 - the $(colour bl inputs) directory must be specified as such and inside one or more directories of your choice.
 - an $(colour bl outputs) directory will be created at the same level of the inputs directory where the results 
   of the aws commands will be stored.\n"
	exit 2;;
esac

# instancesNamesFile=${1##*/}	 #; delete everything (*) up to last / and return the rest = (`basename $1`) but more efficient
instancesNamesFile=${1}		 #; actually need the full path ; message "instancesNameFile: $instancesNamesFile"

# general inputs directory	 # return what is left after eliminating the last / and any character following it
inputsDir=${1%/*}		 # message "inputsdir: $inputsDir"
				 
# general outputs directory	 # note that some data in the outpus directory (from creating instances) is needed as input
outputsDir=${1%/inputs*}/outputs # return what is left after eliminating the second to last / and "inputs" and any character
				 # following "inputs", then adds "/outputs"
				 # message "outputsdir: $outputsDir"

message "$(colour cyan "Deleting domain names:")"

check_theScripts_csconfiguration "$instancesNamesFile" || exit 1

check_created_resources_results_files "DO-EXIST" "DOMAIN_NAME_FILES" "$instancesNamesFile" ||  { message "$(colour lb "$(basename $0) aborting")"; exit 1; }

outputsDirThisRun=${outputsDir}/domain-names-delete-output`date '+%Y%m%d.%H%M%S'`
if [ ! -d $outputsDirThisRun ]; then
    message "$(colour brown "Creating directory to hold the results of deleting domain names:")"
    message $outputsDirThisRun
    mkdir -p $outputsDirThisRun
fi

instancesNames=( `cat $instancesNamesFile` )

for instanceFullName in ${instancesNames[@]}
do
    instance=${instanceFullName%-src*}		### get rid of suffix "-srcAMInn.." if it exists
    resultsFile="$outputsDirThisRun/domain-name-delete-$instance.txt"
    
    eip=`awk -F " " '$1 == "Success" {ipaddress=$6} END {print ipaddress}' $outputsDir/domain-names-creation-output/domain-name-create-$instance.txt`

    instanceDomainName=`awk -F " " '$1 == "Success" {domainName=$4} END {print domainName}' $outputsDir/domain-names-creation-output/domain-name-create-$instance.txt`
   
    # create the file batch request required by aws cli command to update the domain records
    fileRequest="
{\n
\t   \"Comment\": \"Deleting subdomain\",\n
\t   \"Changes\": [\n
\t \t     {\n
\t \t \t      \"Action\": \"DELETE\",\n
\t \t \t      \"ResourceRecordSet\": {\n
\t \t \t \t         \"Name\": \"$instanceDomainName\",\n
\t \t \t \t         \"Type\": \"A\",\n
\t \t \t \t         \"TTL\": 3600,\n
\t \t \t \t         \"ResourceRecords\": [{ \"Value\": \"$eip\"}]\n
\t \t \t  }\n
\t \t  }\n
\t ]\n
}\n
"
    echo -e $fileRequest > ${resultsFile%.txt}Request.json
    #message "fileRequest: $fileRequest"
    hostZoneId=`awk -F " " '$1 == "hostZoneId" {print $2}' $inputsDir/resourcesIDs.txt`

    aws route53 change-resource-record-sets --hosted-zone-id $hostZoneId --change-batch file://${resultsFile%.txt}Request.json > $resultsFile 2>&1
    
    awsResult=$?
    if [ $awsResult -eq 0 ]; then
	message "`colour gl Success` deleting `colour bl "domain:"` $instanceDomainName `colour bl ip:` $eip" $resultsFile
    else
	message "`colour red Error` ($awsResult) deleting `colour bl "domain:"` $instanceDomainName `colour bl ip:` $eip" $resultsFile
	message "$(colour gl NB): if error is 254 the domain name to delete was not found (was likely deleted before) and eveything is OK. Otherwise check the results file \"$resultsFile\"." $resultsFile

    fi
done