Use single replica for standalone AIO deployments

Similarly to undercloud, Swift is using only a single replica on AIO
(all-in-one standalone). Therefore recovering from a corrupted or lost object
is not possible, and running replicators and auditors only wastes resources.
And may create some trouble. For example, the DB replicators and auditors will
lock the DB, and new objects won't be stored during that time.

Related-Bug: #1797167

Change-Id: I839393bf6cbb2303a0359f8aed32b2fc67d46f6a
Signed-off-by: Bogdan Dobrelya <bdobreli@redhat.com>

environments/standalone.yaml

@@ -90,3 +90,4 @@ parameter_defaults:
   StackAction: CREATE
   SoftwareConfigTransport: POLL_SERVER_HEAT
   EnablePackageInstall: true
+  SwiftReplicas: 1

environments/standalone/standalone-overcloud.yaml

@@ -15,7 +15,7 @@
 #     * Neutron (and related)
 #     * Glance
 #     * Cinder
-#     * Swift
+#     * Swift (single replica mode)
 #     * Horizon
 #   This file disables any other OpenStack services that would normally be
 #   enabled.
@@ -42,6 +42,10 @@ parameter_defaults:
   # Type: string
   StandaloneHostnameFormat: '%stackname%-standalone-%index%'
 
+  # How many replicas to use in the swift rings.
+  # Type: number
+  SwiftReplicas: 1
+
 resource_registry:
   OS::TripleO::Services::AodhApi: OS::Heat::None
   OS::TripleO::Services::AodhEvaluator: OS::Heat::None

environments/standalone/standalone-tripleo.yaml

@@ -17,7 +17,7 @@
 #     * Neutron (and related)
 #     * Glance
 #     * Cinder
-#     * Swift
+#     * Swift (single replica mode)
 #     * Horizon
 #   This file disables any other OpenStack services that would normally be
 #   enabled.
@@ -45,6 +45,10 @@ parameter_defaults:
   # Type: string
   StackAction: CREATE
 
+  # How many replicas to use in the swift rings.
+  # Type: number
+  SwiftReplicas: 1
+
 resource_registry:
   OS::TripleO::Network::Ports::ControlPlaneVipPort: ../../deployed-server/deployed-neutron-port.yaml
   OS::TripleO::Network::Ports::RedisVipPort: ../../network/ports/noop.yaml

sample-env-generator/standalone.yaml

@@ -18,13 +18,16 @@ environments:
         * Neutron (and related)
         * Glance
         * Cinder
-        * Swift
+        * Swift (single replica mode)
         * Horizon
       This file disables any other OpenStack services that would normally be
       enabled.
 
       openstack overcloud roles generate -o ~/roles_data.yaml Standalone
     files:
+      docker/services/swift-storage.yaml:
+        parameters:
+          - SwiftReplicas
       puppet/services/time/ntp.yaml:
         parameters:
           - NtpServer
@@ -44,6 +47,7 @@ environments:
       StackAction: CREATE
       SoftwareConfigTransport: POLL_SERVER_HEAT
       EnablePackageInstall: true
+      SwiftReplicas: 1
     resource_registry:
       # this network config is assumed by the tripleo deploy command
       OS::TripleO::Network::Ports::RedisVipPort: ../../network/ports/noop.yaml
@@ -135,13 +139,16 @@ environments:
         * Neutron (and related)
         * Glance
         * Cinder
-        * Swift
+        * Swift (single replica mode)
         * Horizon
       This file disables any other OpenStack services that would normally be
       enabled.
 
       openstack overcloud roles generate -o ~/roles_data.yaml Standalone
     files:
+      docker/services/swift-storage.yaml:
+        parameters:
+          - SwiftReplicas
       puppet/services/time/ntp.yaml:
         parameters:
           - NtpServer
@@ -158,6 +165,7 @@ environments:
     sample_values:
       StandaloneCount: 1
       OvercloudStandaloneFlavor: standalone
+      SwiftReplicas: 1
     resource_registry:
       OS::TripleO::Standalone::Net::SoftwareConfig: ../../net-config-bridge.yaml