Honor the flag for Identity v3 API only jobs

When the property ENABLE_IDENTITY_V2 is set to
False in the local.conf file, devstack will:

* Disable the v2 API in Keystone paste config;
* Set Tempest to skip Identity v2 tests and use
  v3 auth tokens to run all the other tests;
* Set Horizon to use v3 API and v3 auth tokens;
* Register the Identity endpoint as v3.

Change-Id: I2575a516244b848e5ed461e7f488c59edc41068d

lib/horizon

@@ -97,7 +97,14 @@ function init_horizon {
     _horizon_config_set $local_settings "" OPENSTACK_KEYSTONE_DEFAULT_ROLE \"Member\"
 
     _horizon_config_set $local_settings "" OPENSTACK_HOST \"${KEYSTONE_SERVICE_HOST}\"
-    _horizon_config_set $local_settings "" OPENSTACK_KEYSTONE_URL "\"${KEYSTONE_SERVICE_PROTOCOL}://${KEYSTONE_SERVICE_HOST}:${KEYSTONE_SERVICE_PORT}/v2.0\""
+
+    if [ "$ENABLE_IDENTITY_V2" == "False" ]; then
+        # Only Identity v3 API is available; then use it with v3 auth tokens
+        _horizon_config_set $local_settings "" OPENSTACK_API_VERSIONS {\"identity\":\"v3\"}
+        _horizon_config_set $local_settings "" OPENSTACK_KEYSTONE_URL "\"${KEYSTONE_SERVICE_PROTOCOL}://${KEYSTONE_SERVICE_HOST}:${KEYSTONE_SERVICE_PORT}/v3\""
+    else
+        _horizon_config_set $local_settings "" OPENSTACK_KEYSTONE_URL "\"${KEYSTONE_SERVICE_PROTOCOL}://${KEYSTONE_SERVICE_HOST}:${KEYSTONE_SERVICE_PORT}/v2.0\""
+    fi
 
     if [ -f $SSL_BUNDLE_FILE ]; then
         _horizon_config_set $local_settings "" OPENSTACK_SSL_CACERT \"${SSL_BUNDLE_FILE}\"

lib/keystone

@@ -204,6 +204,12 @@ function configure_keystone {
         KEYSTONE_PASTE_INI="$KEYSTONE_CONF"
     fi
 
+    if [ "$ENABLE_IDENTITY_V2" == "False" ]; then
+        # Only Identity v3 API should be available; then disable v2 pipelines
+        inidelete $KEYSTONE_PASTE_INI composite:main \\/v2.0
+        inidelete $KEYSTONE_PASTE_INI composite:admin \\/v2.0
+    fi
+
     configure_keystone_extensions
 
     # Rewrite stock ``keystone.conf``

lib/tempest

@@ -311,7 +311,15 @@ function configure_tempest {
         iniset $TEMPEST_CONFIG identity admin_tenant_id $ADMIN_TENANT_ID
         iniset $TEMPEST_CONFIG identity admin_domain_name $ADMIN_DOMAIN_NAME
     fi
-    iniset $TEMPEST_CONFIG identity auth_version ${TEMPEST_AUTH_VERSION:-v2}
+    if [ "$ENABLE_IDENTITY_V2" == "False" ]; then
+        # Only Identity v3 is available; then skip Identity API v2 tests
+        iniset $TEMPEST_CONFIG identity-feature-enabled v2_api False
+        # In addition, use v3 auth tokens for running all Tempest tests
+        iniset $TEMPEST_CONFIG identity auth_version v3
+    else
+        iniset $TEMPEST_CONFIG identity auth_version ${TEMPEST_AUTH_VERSION:-v2}
+    fi
+
     if is_ssl_enabled_service "key" || is_service_enabled tls-proxy; then
         iniset $TEMPEST_CONFIG identity ca_certificates_file $SSL_BUNDLE_FILE
     fi

stackrc

@@ -87,9 +87,6 @@ TEMPEST_SERVICES=""
 # Set the default Nova APIs to enable
 NOVA_ENABLED_APIS=ec2,osapi_compute,metadata
 
-# Configure Identity API version: 2.0, 3
-IDENTITY_API_VERSION=2.0
-
 # Whether to use 'dev mode' for screen windows. Dev mode works by
 # stuffing text into the screen windows so that a developer can use
 # ctrl-c, up-arrow, enter to restart the service. Starting services
@@ -106,6 +103,22 @@ elif [[ -f $RC_DIR/.localrc.auto ]]; then
     source $RC_DIR/.localrc.auto
 fi
 
+# Configure Identity API version: 2.0, 3
+IDENTITY_API_VERSION=${IDENTITY_API_VERSION:-2.0}
+
+# Set the option ENABLE_IDENTITY_V2 to True. It defines whether the DevStack
+# deployment will be deploying the Identity v2 pipelines. If this option is set
+# to ``False``, DevStack will: i) disable Identity v2; ii) configure Tempest to
+# skip Identity v2 specific tests; and iii) configure Horizon to use Identity
+# v3. When this option is set to ``False``, the option IDENTITY_API_VERSION
+# will to be set to ``3`` in order to make DevStack register the Identity
+# endpoint as v3. This flag is experimental and will be used as basis to
+# identify the projects which still have issues to operate with Identity v3.
+ENABLE_IDENTITY_V2=$(trueorfalse True ENABLE_IDENTITY_V2)
+if [ "$ENABLE_IDENTITY_V2" == "False" ]; then
+    IDENTITY_API_VERSION=3
+fi
+
 # Enable use of Python virtual environments.  Individual project use of
 # venvs are controlled by the PROJECT_VENV array; every project with
 # an entry in the array will be installed into the named venv.