Let's encrypt auto authenticator runner for multiply domains

run_letsencrypt

#!/bin/bash

#Vars
web_service='nginx'
config_path='/usr/local/letssl/'
le_path='/opt/letsencrypt'
exp_limit=20;

#Func
function check_ssl {
        echo $1
        if [ -f $1 ]; then
                #find domain
                domain=`grep "^\s*domains" $1 | sed "s/^\s*domains\s*=\s*//" | sed 's/(\s*)\|,.*$//'`
                cert_file="/etc/letsencrypt/live/$domain/fullchain.pem"

                #check if cert exist
                if [ ! -f $cert_file ]; then
                        echo "[ERROR] certificate file not found for domain $domain."
                fi

                #get exp date
                exp=$(date -d "`openssl x509 -in $cert_file -text -noout|grep "Not After"|cut -c 25-`" +%s)
                datenow=$(date -d "now" +%s)
                days_exp=$(echo \( $exp - $datenow \) / 86400 |bc)

                echo "Checking expiration date for $domain..."

                #check exp date
                if [ "$days_exp" -gt "$exp_limit" ] ; then
                        echo "The certificate is up to date, no need for renewal ($days_exp days left)."
                else
                        echo "The certificate for $domain is about to expire soon. Starting webroot renewal script..."

                        #update cert
                        $le_path/letsencrypt-auto certonly -a webroot --agree-tos --renew-by-default --config $1

                        #reload webserver
                        echo "Reloading $web_service"
                        /usr/sbin/service $web_service reload

                        #done
                        echo "Renewal process finished for domain $domain"
                fi
        else
                echo "[ERROR] config file does not exist: $1"
        fi
}

#loop
configs="$config_path*.ini"
for f in $configs
do
        #echo $f
        check_ssl $f
done

exit 0;

Updated version: https://github.com/littleguga/letsencrypt-config