Create self signed certificates based on FQDN, launch `rancher/rancher` container and check, belongs to https://medium.com/@superseb/zero-to-rancher-2-x-single-install-using-created-self-signed-certificates-in-5-minutes-5f9fe11fceb0

rancher-singlenodeinstall-selfsignedcert.sh

#!/bin/bash
if [[ $DEBUG == "true" ]]; then
  set -x
fi

# Check if FQDN is given
if [ -z "$1" ]; then
    echo "Usage: $0 rancher.yourdomain.com"
    exit 1
fi

# Set config here
export FQDN=$1
export CA_SUBJECT="My own root CA"
export CA_EXPIRE="1825" # CA expires in 5 years
export SSL_EXPIRE="365" # Certificate expires in 1 year
export SSL_SUBJECT="${FQDN}"
export SSL_DNS="${FQDN}" # Additional SANs (comma separated) can be added
#export SSL_IP="127.0.0.1,127.0.0.2" # Additional IPs (comma separated) can be added
export SILENT="true"

# Due to this open PR (https://github.com/paulczar/omgwtfssl/pull/10) I changed to use the edited version of the Docker image under superseb/omgwtfssl. Of course with appropriate referral in the description.
docker run -v $PWD/certs:/certs \
  -e CA_SUBJECT \
  -e CA_EXPIRE \
  -e SSL_EXPIRE \
  -e SSL_SUBJECT \
  -e SSL_DNS \
  -e SSL_IP \
  -e SILENT \
  superseb/omgwtfssl

docker run -d --restart=unless-stopped \
  -p 8080:80 -p 8443:443 \
  -v $PWD/rancher:/var/lib/rancher \
  -v $PWD/certs/cert.pem:/etc/rancher/ssl/cert.pem \
  -v $PWD/certs/key.pem:/etc/rancher/ssl/key.pem \
  -v $PWD/certs/ca.pem:/etc/rancher/ssl/cacerts.pem \
  rancher/rancher:latest

echo "Waiting for Rancher to be started"
while true; do
  docker run --rm --net=host appropriate/curl -sLk "https://$FQDN:8443/ping" && break
  echo -n "."
  sleep 5
done

echo ""

docker run --rm --net=host superseb/rancher-check "https://${FQDN}:8443"