Install letsencrypt cross signed certs for Red Hat distros

ansible-letsencrypt-install-ca-certs.yaml

---
# https://letsencrypt.org/certificates/
- hosts: all
  tasks:
    - name: install letsencrypt cross-signed x3
      get_url:
        url: https://letsencrypt.org/certs/lets-encrypt-x3-cross-signed.pem.txt
        dest: /etc/pki/ca-trust/source/anchors/lets-encrypt-x3-cross-signed.pem
      register: x3
    - name: install letsencrypt cross-signed x4
      get_url:
        url: https://letsencrypt.org/certs/lets-encrypt-x4-cross-signed.pem.txt
        dest: /etc/pki/ca-trust/source/anchors/lets-encrypt-x4-cross-signed.pem
      register: x4
    - name:
      command: update-ca-trust --extract
      when: x3.changed or x4.changed