Add TLS support to masakari backends

By overriding the variable `masakari_backend_ssl: True` HTTPS will
be enabled, disabling HTTP support on the masakari backend api.

The ansible-role-pki is used to generate the required TLS
certificates if this functionality is enabled.

Depends-On: https://review.opendev.org/c/openstack/openstack-ansible/+/879085
Change-Id: I2ea927dbfd7c9164b0f4d5fb793164ce4ad17094

defaults/main.yml

@@ -209,3 +209,51 @@ masakari_optional_oslomsg_amqp1_pip_packages:
 masakari_monitor_corosync_multicast_interface: "br-mgmt"
 masakari_monitor_corosync_multicast_ports: 5405
 masakari_monitor_corosync_ipmi_check: False
+
+###
+### Backend TLS
+###
+
+# Define if communication between haproxy and service backends should be
+# encrypted with TLS.
+masakari_backend_ssl: "{{ openstack_service_backend_ssl | default(False) }}"
+
+# Storage location for SSL certificate authority
+masakari_pki_dir: "{{ openstack_pki_dir | default('/etc/openstack_deploy/pki') }}"
+
+# Delegated host for operating the certificate authority
+masakari_pki_setup_host: "{{ openstack_pki_setup_host | default('localhost') }}"
+
+# masakari server certificate
+masakari_pki_keys_path: "{{ masakari_pki_dir ~ '/certs/private/' }}"
+masakari_pki_certs_path: "{{ masakari_pki_dir ~ '/certs/certs/' }}"
+masakari_pki_intermediate_cert_name: "{{ openstack_pki_service_intermediate_cert_name | default('ExampleCorpIntermediate') }}"
+masakari_pki_regen_cert: ''
+masakari_pki_san: "{{ openstack_pki_san | default('DNS:' ~ ansible_facts['hostname'] ~ ',IP:' ~ management_address) }}"
+masakari_pki_certificates:
+  - name: "masakari_{{ ansible_facts['hostname'] }}"
+    provider: ownca
+    cn: "{{ ansible_facts['hostname'] }}"
+    san: "{{ masakari_pki_san }}"
+    signed_by: "{{ masakari_pki_intermediate_cert_name }}"
+
+# masakari destination files for SSL certificates
+masakari_ssl_cert: /etc/masakari/masakari.pem
+masakari_ssl_key: /etc/masakari/masakari.key
+
+# Installation details for SSL certificates
+masakari_pki_install_certificates:
+  - src: "{{ masakari_user_ssl_cert | default(masakari_pki_certs_path ~ 'masakari_' ~ ansible_facts['hostname'] ~ '-chain.crt') }}"
+    dest: "{{ masakari_ssl_cert }}"
+    owner: "{{ masakari_system_user_name }}"
+    group: "{{ masakari_system_user_name }}"
+    mode: "0644"
+  - src: "{{ masakari_user_ssl_key | default(masakari_pki_keys_path ~ 'masakari_' ~ ansible_facts['hostname'] ~ '.key.pem') }}"
+    dest: "{{ masakari_ssl_key }}"
+    owner: "{{ masakari_system_user_name }}"
+    group: "{{ masakari_system_user_name }}"
+    mode: "0600"
+
+# Define user-provided SSL certificates
+#masakari_user_ssl_cert: <path to cert on ansible deployment host>
+#masakari_user_ssl_key: <path to cert on ansible deployment host>

handlers/main.yml

@@ -23,3 +23,4 @@
   listen:
     - "venv changed"
     - "systemd service changed"
+    - "cert installed"

tasks/main.yml

@@ -75,6 +75,26 @@
   tags:
     - masakari-install
 
+- name: Create and install SSL certificates
+  include_role:
+    name: pki
+    tasks_from: main_certs.yml
+    apply:
+      tags:
+        - masakari-config
+        - pki
+  vars:
+    pki_setup_host: "{{ masakari_pki_setup_host }}"
+    pki_dir: "{{ masakari_pki_dir }}"
+    pki_create_certificates: "{{ masakari_user_ssl_cert is not defined and masakari_user_ssl_key is not defined }}"
+    pki_regen_cert: "{{ masakari_pki_regen_cert }}"
+    pki_certificates: "{{ masakari_pki_certificates }}"
+    pki_install_certificates: "{{ masakari_pki_install_certificates }}"
+  when:
+    - masakari_backend_ssl
+  tags:
+    - always
+
 - name: Install the python venv
   import_role:
     name: "python_venv_build"

templates/masakari.conf.j2

@@ -19,7 +19,11 @@ os_privileged_user_name = {{ masakari_service_user_name }}
 os_privileged_user_password = {{ masakari_service_password }}
 service_down_time = 60
 periodic_enable = true
-use_ssl = false
+{% if masakari_backend_ssl | bool %}
+use_ssl = True
+ssl_cert_file = {{ masakari_ssl_cert }}
+ssl_key_file = {{ masakari_ssl_key }}
+{% endif %}
 
 [wsgi]
 # The paste configuration file path