Let's Encrypt on Ubuntu for Spring-Boot applications

application.yml

server:
  port: 8443
   ssl:
    # this should match with the used ${DEST}
    key-store: file:./keystore.p12
    key-store-password: password
    keyStoreType: PKCS12
    keyAlias: tomcat

install_certificate.sh

#!/bin/bash
# Add the staging option (--staging) to certbot-auto if you wish to validate the procedure
DEST=$1
DOMAIN=$2
EMAIL=$3

mkdir -p /opt/certbot
wget https://dl.eff.org/certbot-auto -O /opt/certbot/certbot-auto
chmod a+x /opt/certbot/certbot-auto
/opt/certbot/certbot-auto certonly --debug --non-interactive --email ${EMAIL} --agree-tos --standalone -d ${DOMAIN} --keep-until-expiring
openssl pkcs12 -export -in /etc/letsencrypt/live/${DOMAIN}/cert.pem -inkey /etc/letsencrypt/live/${DOMAIN}/privkey.pem -out ${DEST} -name tomcat -CAfile /etc/letsencrypt/live/${DOMAIN}/chain.pem -caname root -passout pass:password

renew_certificate.sh

#!/bin/bash
# Make sure to reboot the SpringBoot application
DEST=$1
DOMAIN=$2

/opt/certbot/certbot-auto renew
openssl pkcs12 -export -in /etc/letsencrypt/live/${DOMAIN}/cert.pem -inkey /etc/letsencrypt/live/${DOMAIN}/privkey.pem -out ${DEST} -name tomcat -CAfile /etc/letsencrypt/live/${DOMAIN}/chain.pem -caname root -passout pass:password

Hi Robert! Thanks for sharing Im trying to use SSL for the first time with my SpringBoot App.

I have some questions:

1- Is this procedure still valid to create a SSL certificate for a SpringBoot app?

2- To renew the certificate... Must I restart the Spring Boot app to get the new certificate right? Is there a way to avoid this?

Hi @sebasira

1 - Yeah - this is independent of SpringBoot.
2 - If you use the certificate as shown above you might need to restart the app so it is able to pick up the new one. To avoid - you would have to check the SpringBoot man pages if there is some kind of refresh mechanismn (like @RefreshScope for configuration) when it comes SSL certs.

Cheers, Robert

Thanks for your reply! I'm testing this right now and let you know how it goes!

Thanks! It works great!

Thanks! i wrote something similar about a month ago and lost it, thanks for sharing! gonna test it tomorrow at work!

that is what I was looking for. Thanks