Old implementation

The following is the old, manual, way of installing SSL certs.

Tomcat 7 automatic installation

Using the TS commandline tools, you specify the domain and your email

  tsinstallssl.sh server.acme.com [email protected]

After a couple of minutes you will be rquired to enter the domain an email again, and accept the terms of service

Tomcat 7 manual installation

Install and configure letsencrypt

Download an build certbot (letsencrypt client)

sudo yum -y install python27-devel git (deprecated)

sudo yum -y install python36 python36-pip
sudo yum -y install git-all
sudo git clone https://github.com/letsencrypt/letsencrypt /opt/letsencrypt
/opt/letsencrypt/letsencrypt-auto --debug --agree-tos

Create a config file

sudo touch /etc/letsencrypt/config.ini
sudo chmod 777 /etc/letsencrypt/config.ini
sudo echo "rsa-key-size = 4096" >> /etc/letsencrypt/config.ini
sudo echo "email = [email protected]" >> /etc/letsencrypt/config.ini

Generate PKCS12 certificate

Generate a certificate

sudo mkdir /usr/share/tomcat7/webapps/ROOT
/opt/letsencrypt/letsencrypt-auto certonly --debug --webroot -w /usr/share/tomcat7/webapps/ROOT -d letsencrypt.tempusserva.dk --config /etc/letsencrypt/config.ini --agree-tos 

Convert to pkcs12 format

  sudo -s

cd /etc/letsencrypt/live/letsencrypt.tempusserva.dk
openssl pkcs12 -export -out bundle.pfx -inkey privkey.pem -in cert.pem -certfile chain.pem -password pass:TempusServaSecret
chmod 755 bundle.pfx
chmod 755 /etc/letsencrypt/live

  Press: ctrl + d

Install certificate in Tomcat

Edit Tomcat configuration

sudo nano  /usr/share/tomcat7/conf/server.xml

          <Connector
          protocol="org.apache.coyote.http11.Http11NioProtocol"
          port="8443" maxThreads="200"
          scheme="https" secure="true" SSLEnabled="true"
          keystoreFile="/etc/letsencrypt/live/letsencrypt.tempusserva.dk/bundle.pfx" keystorePass="TempusServaSecret"
          ciphers="TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA256,TLS_RSA_WITH_AES_128_CBC_SHA"
          clientAuth="false" sslProtocol="TLS" keystoreType="PKCS12"/>

Reboot the server

service tomcat7 restart