create-lc-and-update-asg

#!/bin/bash

update_asg(){
source asg_var

for (( i = 0 ; i < ${#names[@]} ; i++ )) do
    LC=`aws autoscaling describe-auto-scaling-groups --auto-scaling-group-name ${names[i]} --query 'AutoScalingGroups[0].LaunchConfigurationName' --output text`
    echo "${names[i]} Launch config name is :" $LC

   AMI=`aws autoscaling describe-launch-configurations --launch-configuration-names $LC --query 'LaunchConfigurations[0].ImageId' --output text`
   instancetype=`aws autoscaling describe-launch-configurations --launch-configuration-names $LC --query 'LaunchConfigurations[0].InstanceType' --output text`
   aws autoscaling describe-launch-configurations --launch-configuration-names $LC --query 'LaunchConfigurations[0].BlockDeviceMappings' > userdata_files/disk.json
   securitygroup=`aws autoscaling describe-launch-configurations --launch-configuration-names $LC --query 'LaunchConfigurations[0].SecurityGroups' --output text`
    cd userdata_files
   monit=`aws autoscaling describe-launch-configurations --launch-configuration-names $LC --query 'LaunchConfigurations[0].InstanceMonitoring.Enabled' --output text`
  # monit="false"
   key_name=`aws autoscaling describe-launch-configurations --launch-configuration-names $LC --query 'LaunchConfigurations[0].KeyName' --output text` 
    #creating new launch config 
  # [ -e userdata-$LC.txt ] || rm disk.json;echo "Please create UserData first" && exit 
   ASG=${names[i]}
   LC_name=$ASG-LC-$DATE

   #check instance is spot or not 
   spot=`aws autoscaling describe-launch-configurations --launch-configuration-names $LC --query 'LaunchConfigurations[0].SpotPrice' --output text`
   if [ $spot == "None" ];then
       aws autoscaling create-launch-configuration --launch-configuration-name $LC_name --image-id $AMI --instance-type $instancetype --block-device-mappings file://disk.json --user-data file://userdata-$LC.txt --security-groups $securitygroup --associate-public-ip-address --instance-monitoring Enabled=$monit --key-name $key_name
      rm disk.json;rc=$?; if [[ $rc != 0 ]]; then echo -e "$(tput setaf 1)$(tput bold)\nUnsuccessful $LC creation please check\n $(tput sgr0)"  && exit $rc; fi

        echo "Updating ${names[i]} Autoscaling group ...";
	aws autoscaling update-auto-scaling-group --auto-scaling-group-name ${names[i]} --launch-configuration-name $LC_name
        rc=$?; if [[ $rc != 0 ]]; then echo -e "$(tput setaf 1)$(tput bold)\nUnsuccessful ${names[i]} updation please check\n $(tput sgr0)"  && exit $rc; fi
	echo "Done."
   else 
      aws autoscaling create-launch-configuration --launch-configuration-name $LC_name --image-id $AMI --instance-type $instancetype --block-device-mappings file://disk.json --user-data file://userdata-$LC.txt --security-groups $securitygroup --spot-price $spot --associate-public-ip-address --instance-monitoring Enabled=$monit --key-name $key_name
      rm disk.json;rc=$?; if [[ $rc != 0 ]]; then echo -e "$(tput setaf 1)$(tput bold)\nUnsuccessful $LC creation please check\n $(tput sgr0)"  && exit $rc; fi
  
        echo "Updating ${names[i]} Autoscaling group ...";
	aws autoscaling update-auto-scaling-group --auto-scaling-group-name ${names[i]} --launch-configuration-name $LC_name
        rc=$?; if [[ $rc != 0 ]]; then echo -e "$(tput setaf 1)$(tput bold)\nUnsuccessful ${names[i]} updation please check\n $(tput sgr0)"  && exit $rc; fi
	echo "Done."
 fi 
cd ..
  done
  rm -rf userdata_files
 }

main(){

## Create temp dir if not exists 
[[ -d "userdata_files" ]] || mkdir "userdata_files"
update_asg

}
main