Apache: Use conditional instead of nested stack for TLS-specific bits

Usually a nested stack is used that contains the TLS-everywhere bits
(config_settings and metadata_settings). Nested stacks are very
resource intensive. So, instead of doing using nested stacks, this patch
changes that to use a conditional, and output the necessary
config_settings  and metadata_settings this way in an attempt to save
resources.

Change-Id: Ia7ee632383542ac012c20448ff1b4435004e57e3

environments/enable-internal-tls.yaml

@@ -12,7 +12,6 @@ resource_registry:
   OS::TripleO::Services::CertmongerUser: ../puppet/services/certmonger-user.yaml
 
   OS::TripleO::Services::HAProxyInternalTLS: ../puppet/services/haproxy-internal-tls-certmonger.yaml
-  OS::TripleO::Services::ApacheTLS: ../puppet/services/apache-internal-tls-certmonger.yaml
   OS::TripleO::Services::MySQLTLS: ../puppet/services/database/mysql-internal-tls-certmonger.yaml
 
   # We use apache as a TLS proxy

overcloud-resource-registry-puppet.j2.yaml

@@ -120,7 +120,6 @@ resource_registry:
   # services
   OS::TripleO::Services: puppet/services/services.yaml
   OS::TripleO::Services::Apache: puppet/services/apache.yaml
-  OS::TripleO::Services::ApacheTLS: OS::Heat::None
   OS::TripleO::Services::CACerts: puppet/services/ca-certs.yaml
   OS::TripleO::Services::CephMds: OS::Heat::None
   OS::TripleO::Services::CephMon: OS::Heat::None

puppet/services/apache-internal-tls-certmonger.yaml

@@ -1,75 +0,0 @@
-heat_template_version: ocata
-
-description: >
-  Apache service TLS configurations.
-
-parameters:
-  ServiceNetMap:
-    default: {}
-    description: Mapping of service_name -> network name. Typically set
-                 via parameter_defaults in the resource registry.  This
-                 mapping overrides those in ServiceNetMapDefaults.
-    type: json
-  # The following parameters are not needed by the template but are
-  # required to pass the pep8 tests
-  DefaultPasswords:
-    default: {}
-    type: json
-  EndpointMap:
-    default: {}
-    description: Mapping of service endpoint -> protocol. Typically set
-                 via parameter_defaults in the resource registry.
-    type: json
-
-resources:
-
-  ApacheNetworks:
-    type: OS::Heat::Value
-    properties:
-      value:
-        # NOTE(jaosorior) Get unique network names to create
-        # certificates for those. We skip the tenant network since
-        # we don't need a certificate for that, and the external
-        # network will be handled in another template.
-        yaql:
-          expression: list($.data.map.items().map($1[1])).distinct().where($ != external and $ != tenant)
-          data:
-            map:
-              get_param: ServiceNetMap
-
-outputs:
-  role_data:
-    description: Role data for the Apache role.
-    value:
-      service_name: apache_internal_tls_certmonger
-      config_settings:
-        generate_service_certificates: true
-        apache_certificates_specs:
-          map_merge:
-            repeat:
-              template:
-                httpd-NETWORK:
-                  service_certificate: '/etc/pki/tls/certs/httpd-NETWORK.crt'
-                  service_key: '/etc/pki/tls/private/httpd-NETWORK.key'
-                  hostname: "%{hiera('fqdn_NETWORK')}"
-                  principal: "HTTP/%{hiera('fqdn_NETWORK')}"
-              for_each:
-                NETWORK: {get_attr: [ApacheNetworks, value]}
-      metadata_settings:
-        repeat:
-          template:
-            - service: HTTP
-              network: $NETWORK
-              type: node
-          for_each:
-            $NETWORK: {get_attr: [ApacheNetworks, value]}
-      upgrade_tasks:
-        - name: Check if httpd is deployed
-          command: systemctl is-enabled httpd
-          tags: common
-          ignore_errors: True
-          register: httpd_enabled
-        - name: "PreUpgrade step0,validation: Check service httpd is running"
-          shell: /usr/bin/systemctl show 'httpd' --property ActiveState | grep '\bactive\b'
-          when: httpd_enabled.rc == 0
-          tags: step0,validation

puppet/services/apache.yaml

@@ -31,13 +31,25 @@ parameters:
     type: boolean
     default: false
 
+conditions:
+
+  internal_tls_enabled: {equals: [{get_param: EnableInternalTLS}, true]}
 
 resources:
 
-  ApacheTLS:
+  ApacheNetworks:
-    type: OS::TripleO::Services::ApacheTLS
+    type: OS::Heat::Value
     properties:
-      ServiceNetMap: {get_param: ServiceNetMap}
+      value:
+        # NOTE(jaosorior) Get unique network names to create
+        # certificates for those. We skip the tenant network since
+        # we don't need a certificate for that, and the external
+        # is for HAProxy so it isn't used for apache either.
+        yaql:
+          expression: list($.data.map.items().map($1[1])).distinct().where($ != external and $ != tenant)
+          data:
+            map:
+              get_param: ServiceNetMap
 
 outputs:
   role_data:
@@ -46,7 +58,6 @@ outputs:
       service_name: apache
       config_settings:
         map_merge:
-          - get_attr: [ApacheTLS, role_data, config_settings]
           -
             # for the given network; replacement examples (eg. for internal_api):
             # internal_api -> IP
@@ -64,8 +75,31 @@ outputs:
             apache::mod::prefork::serverlimit: { get_param: ApacheServerLimit }
             apache::mod::remoteip::proxy_ips:
               - "%{hiera('apache_remote_proxy_ips_network')}"
+          -
+            generate_service_certificates: true
+            apache_certificates_specs:
+              map_merge:
+                repeat:
+                  template:
+                    httpd-NETWORK:
+                      service_certificate: '/etc/pki/tls/certs/httpd-NETWORK.crt'
+                      service_key: '/etc/pki/tls/private/httpd-NETWORK.key'
+                      hostname: "%{hiera('fqdn_NETWORK')}"
+                      principal: "HTTP/%{hiera('fqdn_NETWORK')}"
+                  for_each:
+                    NETWORK: {get_attr: [ApacheNetworks, value]}
       metadata_settings:
-        get_attr: [ApacheTLS, role_data, metadata_settings]
+        if:
+          - internal_tls_enabled
+          -
+            repeat:
+              template:
+                - service: HTTP
+                  network: $NETWORK
+                  type: node
+              for_each:
+                $NETWORK: {get_attr: [ApacheNetworks, value]}
+          - null
       upgrade_tasks:
         - name: Check if httpd is deployed
           command: systemctl is-enabled httpd