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Auto renewal for Let's Encrypt Apache
#!/bin/bash
#================================================================
# Let's Encrypt renewal script for Apache on Ubuntu/Debian
# @author Erika Heidi<erika@do.co>
# Usage: ./le-renew.sh [base-domain-name]
# More info: http://do.co/1mbVihI
#================================================================
domain=$1
le_path='/opt/letsencrypt'
le_conf='/etc/letsencrypt'
exp_limit=30;
get_domain_list(){
certdomain=$1
config_file="$le_conf/renewal/$certdomain.conf"
if [ ! -f $config_file ] ; then
echo "[ERROR] The config file for the certificate $certdomain was not found."
exit 1;
fi
domains=$(grep --only-matching --perl-regex "(?<=domains \= ).*" "${config_file}")
last_char=$(echo "${domains}" | awk '{print substr($0,length,1)}')
if [ "${last_char}" = "," ]; then
domains=$(echo "${domains}" |awk '{print substr($0, 1, length-1)}')
fi
echo $domains;
}
if [ -z "$domain" ] ; then
echo "[ERROR] you must provide the domain name for the certificate renewal."
exit 1;
fi
cert_file="/etc/letsencrypt/live/$domain/fullchain.pem"
if [ ! -f $cert_file ]; then
echo "[ERROR] certificate file not found for domain $domain."
exit 1;
fi
exp=$(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 $domain..."
if [ "$days_exp" -gt "$exp_limit" ] ; then
echo "The certificate is up to date, no need for renewal ($days_exp days left)."
exit 0;
else
echo "The certificate for $domain is about to expire soon. Starting renewal request..."
domain_list=$( get_domain_list $domain )
"$le_path"/letsencrypt-auto certonly --text --renew-by-default --standalone --standalone-supported-challenges tls-sni-01 --domains "${domain_list}"
echo "Renewal process finished for domain $domain"
exit 0;
fi
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