Add TLS support to heat backends

By overriding the variable `heat_backend_ssl: True` HTTPS will
be enabled, disabling HTTP support on the heat 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: Ifb904adc61f1461e646c3fce0bd062f526b8e446

defaults/main.yml

@@ -252,6 +252,7 @@ heat_services:
     uwsgi_overrides: "{{ heat_api_uwsgi_ini_overrides }}"
     uwsgi_port: "{{ heat_service_port }}"
     uwsgi_bind_address: "{{ heat_api_uwsgi_bind_address }}"
+    uwsgi_tls: "{{ heat_backend_ssl | ternary(heat_uwsgi_tls, {}) }}"
   heat-api-cfn:
     group: heat_api_cfn
     service_name: heat-api-cfn
@@ -262,6 +263,7 @@ heat_services:
     uwsgi_overrides: "{{ heat_api_cfn_uwsgi_ini_overrides }}"
     uwsgi_port: "{{ heat_cfn_service_port }}"
     uwsgi_bind_address: "{{ heat_api_cfn_uwsgi_bind_address }}"
+    uwsgi_tls: "{{ heat_backend_ssl | ternary(heat_uwsgi_tls, {}) }}"
   heat-engine:
     group: heat_engine
     service_name: heat-engine
@@ -287,6 +289,9 @@ heat_wsgi_processes: "{{ [[ansible_facts['processor_vcpus']|default(1), 1] | max
 heat_wsgi_threads: 1
 heat_api_uwsgi_bind_address: "{{ openstack_service_bind_address | default('0.0.0.0') }}"
 heat_api_cfn_uwsgi_bind_address: "{{ openstack_service_bind_address | default('0.0.0.0') }}"
+heat_uwsgi_tls:
+  crt: "{{ heat_ssl_cert }}"
+  key: "{{ heat_ssl_key }}"
 
 ## Tunable overrides
 heat_heat_conf_overrides: {}
@@ -295,3 +300,51 @@ heat_default_yaml_overrides: {}
 heat_aws_cloudwatch_alarm_yaml_overrides: {}
 heat_aws_rds_dbinstance_yaml_overrides: {}
 heat_policy_overrides: {}
+
+###
+### Backend TLS
+###
+
+# Define if communication between haproxy and service backends should be
+# encrypted with TLS.
+heat_backend_ssl: "{{ openstack_service_backend_ssl | default(False) }}"
+
+# Storage location for SSL certificate authority
+heat_pki_dir: "{{ openstack_pki_dir | default('/etc/openstack_deploy/pki') }}"
+
+# Delegated host for operating the certificate authority
+heat_pki_setup_host: "{{ openstack_pki_setup_host | default('localhost') }}"
+
+# heat server certificate
+heat_pki_keys_path: "{{ heat_pki_dir ~ '/certs/private/' }}"
+heat_pki_certs_path: "{{ heat_pki_dir ~ '/certs/certs/' }}"
+heat_pki_intermediate_cert_name: "{{ openstack_pki_service_intermediate_cert_name | default('ExampleCorpIntermediate') }}"
+heat_pki_regen_cert: ''
+heat_pki_san: "{{ openstack_pki_san | default('DNS:' ~ ansible_facts['hostname'] ~ ',IP:' ~ management_address) }}"
+heat_pki_certificates:
+  - name: "heat_{{ ansible_facts['hostname'] }}"
+    provider: ownca
+    cn: "{{ ansible_facts['hostname'] }}"
+    san: "{{ heat_pki_san }}"
+    signed_by: "{{ heat_pki_intermediate_cert_name }}"
+
+# heat destination files for SSL certificates
+heat_ssl_cert: /etc/heat/heat.pem
+heat_ssl_key: /etc/heat/heat.key
+
+# Installation details for SSL certificates
+heat_pki_install_certificates:
+  - src: "{{ heat_user_ssl_cert | default(heat_pki_certs_path ~ 'heat_' ~ ansible_facts['hostname'] ~ '-chain.crt') }}"
+    dest: "{{ heat_ssl_cert }}"
+    owner: "{{ heat_system_user_name }}"
+    group: "{{ heat_system_user_name }}"
+    mode: "0644"
+  - src: "{{ heat_user_ssl_key | default(heat_pki_keys_path ~ 'heat_' ~ ansible_facts['hostname'] ~ '.key.pem') }}"
+    dest: "{{ heat_ssl_key }}"
+    owner: "{{ heat_system_user_name }}"
+    group: "{{ heat_system_user_name }}"
+    mode: "0600"
+
+# Define user-provided SSL certificates
+#heat_user_ssl_cert: <path to cert on ansible deployment host>
+#heat_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

@@ -102,6 +102,26 @@
   tags:
     - heat-install
 
+- name: Create and install SSL certificates
+  include_role:
+    name: pki
+    tasks_from: main_certs.yml
+    apply:
+      tags:
+        - heat-config
+        - pki
+  vars:
+    pki_setup_host: "{{ heat_pki_setup_host }}"
+    pki_dir: "{{ heat_pki_dir }}"
+    pki_create_certificates: "{{ heat_user_ssl_cert is not defined and heat_user_ssl_key is not defined }}"
+    pki_regen_cert: "{{ heat_pki_regen_cert }}"
+    pki_certificates: "{{ heat_pki_certificates }}"
+    pki_install_certificates: "{{ heat_pki_install_certificates }}"
+  when:
+    - heat_backend_ssl
+  tags:
+    - always
+
 - import_tasks: heat_post_install.yml
   tags:
     - heat-config