Hello everybody,

I created a droplet (Docker 5:19.03.1~3 on 18.04). I pulled my docker image from docker hub and run it. My docker image contains a Spring boot application. (tomcat embedded). It’s working nice but I want to add https (Let’s encrypt) to my page. I found some documents, tutorials but everybody talks about nginx & apache. Can someone please help me to install https to my spring boot (embedded tomcat) application on my droplet (Ubuntu 18.04.3 LTS bionic) The page is up and running now and I will keep it running while fixing this if possible.

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2 answers


I would suggest checking this answer here.

What they are suggesting is the following:

  • Get the certbot from here:


  • Generate a certificate for your domain:
./certbot-auto certonly -a standalone -d example.com -d www.example.com
  • The SSL would be stored at /etc/letsencrypt/live/example.com. Spring Boot expects PKCS#12 formatted file. So t convert the certificate you could do the following:

  • Go to the /etc/letsencrypt/live/example.com directory.

openssl pkcs12 -export -in fullchain.pem -inkey privkey.pem -out keystore.p12 -name tomcat -CAfile chain.pem -caname root
  • The file keystore.p12 with PKCS12 is now generated in /etc/letsencrypt/live/example.com

  • Then you have to configure your Spring Boot app. In your application.properties file and put the following properties there:


I would recommend going through the two original articles as well:

Hope that this helps!

Show answer This answer has been marked as resolved by yonetmen.
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