diff --git a/generated/google/apis/container_v1beta1.rb b/generated/google/apis/container_v1beta1.rb
index c235e2382..b7a72fc8b 100644
--- a/generated/google/apis/container_v1beta1.rb
+++ b/generated/google/apis/container_v1beta1.rb
@@ -26,7 +26,7 @@ module Google
     # @see https://cloud.google.com/container-engine/
     module ContainerV1beta1
       VERSION = 'V1beta1'
-      REVISION = '20201127'
+      REVISION = '20201209'
 
       # View and manage your data across Google Cloud Platform services
       AUTH_CLOUD_PLATFORM = 'https://www.googleapis.com/auth/cloud-platform'
diff --git a/generated/google/apis/container_v1beta1/classes.rb b/generated/google/apis/container_v1beta1/classes.rb
index 0347c09cb..74741475f 100644
--- a/generated/google/apis/container_v1beta1/classes.rb
+++ b/generated/google/apis/container_v1beta1/classes.rb
@@ -4839,33 +4839,33 @@ module Google
       class UpgradeEvent
         include Google::Apis::Core::Hashable
       
-        # Required. The current version before the upgrade.
+        # The current version before the upgrade.
         # Corresponds to the JSON property `currentVersion`
         # @return [String]
         attr_accessor :current_version
       
-        # Required. The operation associated with this upgrade.
+        # The operation associated with this upgrade.
         # Corresponds to the JSON property `operation`
         # @return [String]
         attr_accessor :operation
       
-        # Required. The time when the operation was started.
+        # The time when the operation was started.
         # Corresponds to the JSON property `operationStartTime`
         # @return [String]
         attr_accessor :operation_start_time
       
-        # Optional. Optional relative path to the resource. For example in node pool
-        # upgrades, the relative path of the node pool.
+        # Optional relative path to the resource. For example in node pool upgrades, the
+        # relative path of the node pool.
         # Corresponds to the JSON property `resource`
         # @return [String]
         attr_accessor :resource
       
-        # Required. The resource type that is upgrading.
+        # The resource type that is upgrading.
         # Corresponds to the JSON property `resourceType`
         # @return [String]
         attr_accessor :resource_type
       
-        # Required. The target version for the upgrade.
+        # The target version for the upgrade.
         # Corresponds to the JSON property `targetVersion`
         # @return [String]
         attr_accessor :target_version
diff --git a/generated/google/apis/container_v1beta1/synth.metadata b/generated/google/apis/container_v1beta1/synth.metadata
index 60b0b2dfe..f695b0203 100644
--- a/generated/google/apis/container_v1beta1/synth.metadata
+++ b/generated/google/apis/container_v1beta1/synth.metadata
@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/google-api-ruby-client.git",
-        "sha": "5b7f7e0f53d27d334fb9ec4f327242463ebe1e55"
+        "sha": "e698564f18ee833201743f56b739e0e7831d14dd"
       }
     }
   ]