diff --git a/google/cloud/orchestration/airflow/service/v1beta1/composer_v1beta1.yaml b/google/cloud/orchestration/airflow/service/v1beta1/composer_v1beta1.yaml
index b77a99f6dc0b9..e08b83c2dbcab 100644
--- a/google/cloud/orchestration/airflow/service/v1beta1/composer_v1beta1.yaml
+++ b/google/cloud/orchestration/airflow/service/v1beta1/composer_v1beta1.yaml
@@ -10,11 +10,14 @@ apis:
 
 types:
 - name: google.cloud.orchestration.airflow.service.v1beta1.CheckUpgradeResponse
+- name: google.cloud.orchestration.airflow.service.v1beta1.DatabaseFailoverResponse
 - name: google.cloud.orchestration.airflow.service.v1beta1.ExecuteAirflowCommandResponse
+- name: google.cloud.orchestration.airflow.service.v1beta1.FetchDatabasePropertiesResponse
 - name: google.cloud.orchestration.airflow.service.v1beta1.LoadSnapshotResponse
 - name: google.cloud.orchestration.airflow.service.v1beta1.OperationMetadata
 - name: google.cloud.orchestration.airflow.service.v1beta1.PollAirflowCommandResponse
 - name: google.cloud.orchestration.airflow.service.v1beta1.SaveSnapshotResponse
+- name: google.cloud.orchestration.airflow.service.v1beta1.StopAirflowCommandResponse
 
 documentation:
   summary: Manages Apache Airflow environments on Google Cloud Platform.
diff --git a/google/cloud/orchestration/airflow/service/v1beta1/environments.proto b/google/cloud/orchestration/airflow/service/v1beta1/environments.proto
index a47958ad8b01c..51da9f3c152cc 100644
--- a/google/cloud/orchestration/airflow/service/v1beta1/environments.proto
+++ b/google/cloud/orchestration/airflow/service/v1beta1/environments.proto
@@ -121,6 +121,33 @@ service Environments {
     };
   }
 
+  // Executes Airflow CLI command.
+  rpc ExecuteAirflowCommand(ExecuteAirflowCommandRequest)
+      returns (ExecuteAirflowCommandResponse) {
+    option (google.api.http) = {
+      post: "/v1beta1/{environment=projects/*/locations/*/environments/*}:executeAirflowCommand"
+      body: "*"
+    };
+  }
+
+  // Stops Airflow CLI command execution.
+  rpc StopAirflowCommand(StopAirflowCommandRequest)
+      returns (StopAirflowCommandResponse) {
+    option (google.api.http) = {
+      post: "/v1beta1/{environment=projects/*/locations/*/environments/*}:stopAirflowCommand"
+      body: "*"
+    };
+  }
+
+  // Polls Airflow CLI command execution and fetches logs.
+  rpc PollAirflowCommand(PollAirflowCommandRequest)
+      returns (PollAirflowCommandResponse) {
+    option (google.api.http) = {
+      post: "/v1beta1/{environment=projects/*/locations/*/environments/*}:pollAirflowCommand"
+      body: "*"
+    };
+  }
+
   // Creates a snapshots of a Cloud Composer environment.
   //
   // As a result of this operation, snapshot of environment's state is stored
@@ -150,6 +177,27 @@ service Environments {
       metadata_type: "google.cloud.orchestration.airflow.service.v1beta1.OperationMetadata"
     };
   }
+
+  // Triggers database failover (only for highly resilient environments).
+  rpc DatabaseFailover(DatabaseFailoverRequest)
+      returns (google.longrunning.Operation) {
+    option (google.api.http) = {
+      post: "/v1beta1/{environment=projects/*/locations/*/environments/*}:databaseFailover"
+      body: "*"
+    };
+    option (google.longrunning.operation_info) = {
+      response_type: "google.cloud.orchestration.airflow.service.v1beta1.DatabaseFailoverResponse"
+      metadata_type: "google.cloud.orchestration.airflow.service.v1beta1.OperationMetadata"
+    };
+  }
+
+  // Fetches database properties.
+  rpc FetchDatabaseProperties(FetchDatabasePropertiesRequest)
+      returns (FetchDatabasePropertiesResponse) {
+    option (google.api.http) = {
+      get: "/v1beta1/{environment=projects/*/locations/*/environments/*}:fetchDatabaseProperties"
+    };
+  }
 }
 
 // Create a new environment.
@@ -364,6 +412,25 @@ message RestartWebServerRequest {
   string name = 1;
 }
 
+// Execute Airflow Command request.
+message ExecuteAirflowCommandRequest {
+  // The resource name of the environment in the form:
+  // "projects/{projectId}/locations/{locationId}/environments/{environmentId}".
+  string environment = 1;
+
+  // Airflow command.
+  string command = 2;
+
+  // Airflow subcommand.
+  string subcommand = 3;
+
+  // Parameters for the Airflow command/subcommand as an array of arguments.
+  // It may contain positional arguments like `["my-dag-id"]`, key-value
+  // parameters like `["--foo=bar"]` or `["--foo","bar"]`,
+  // or other flags like `["-f"]`.
+  repeated string parameters = 4;
+}
+
 // Response to ExecuteAirflowCommandRequest.
 message ExecuteAirflowCommandResponse {
   // The unique ID of the command execution for polling.
@@ -379,6 +446,54 @@ message ExecuteAirflowCommandResponse {
   string error = 4;
 }
 
+// Stop Airflow Command request.
+message StopAirflowCommandRequest {
+  // The resource name of the environment in the form:
+  // "projects/{projectId}/locations/{locationId}/environments/{environmentId}".
+  string environment = 1;
+
+  // The unique ID of the command execution.
+  string execution_id = 2;
+
+  // The name of the pod where the command is executed.
+  string pod = 3;
+
+  // The namespace of the pod where the command is executed.
+  string pod_namespace = 4;
+
+  // If true, the execution is terminated forcefully (SIGKILL). If false, the
+  // execution is stopped gracefully, giving it time for cleanup.
+  bool force = 5;
+}
+
+// Response to StopAirflowCommandRequest.
+message StopAirflowCommandResponse {
+  // Whether the execution is still running.
+  bool is_done = 1;
+
+  // Output message from stopping execution request.
+  repeated string output = 2;
+}
+
+// Poll Airflow Command request.
+message PollAirflowCommandRequest {
+  // The resource name of the environment in the form:
+  // "projects/{projectId}/locations/{locationId}/environments/{environmentId}"
+  string environment = 1;
+
+  // The unique ID of the command execution.
+  string execution_id = 2;
+
+  // The name of the pod where the command is executed.
+  string pod = 3;
+
+  // The namespace of the pod where the command is executed.
+  string pod_namespace = 4;
+
+  // Line number from which new logs should be fetched.
+  int32 next_line_number = 5;
+}
+
 // Response to PollAirflowCommandRequest.
 message PollAirflowCommandResponse {
   // Contains information about a single line from logs.
@@ -460,6 +575,44 @@ message LoadSnapshotRequest {
 // Response to LoadSnapshotRequest.
 message LoadSnapshotResponse {}
 
+// Request to trigger database failover (only for highly resilient
+// environments).
+message DatabaseFailoverRequest {
+  // Target environment:
+  // "projects/{projectId}/locations/{locationId}/environments/{environmentId}"
+  string environment = 1;
+}
+
+// Response for DatabaseFailoverRequest.
+message DatabaseFailoverResponse {}
+
+// Request to fetch properties of environment's database.
+message FetchDatabasePropertiesRequest {
+  // Required. The resource name of the environment, in the form:
+  // "projects/{projectId}/locations/{locationId}/environments/{environmentId}"
+  string environment = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      type: "composer.googleapis.com/Environment"
+    }
+  ];
+}
+
+// Response for FetchDatabasePropertiesRequest.
+message FetchDatabasePropertiesResponse {
+  // The Compute Engine zone that the instance is currently serving from.
+  string primary_gce_zone = 1;
+
+  // The Compute Engine zone that the failover instance is currently serving
+  // from for a regional Cloud SQL instance.
+  string secondary_gce_zone = 2;
+
+  // The availability status of the failover replica. A false status indicates
+  // that the failover replica is out of sync. The primary instance can only
+  // fail over to the failover replica when the status is true.
+  bool is_failover_replica_available = 3;
+}
+
 // Configuration information for an environment.
 message EnvironmentConfig {
   // The size of the Cloud Composer environment.
@@ -477,6 +630,15 @@ message EnvironmentConfig {
     ENVIRONMENT_SIZE_LARGE = 3;
   }
 
+  // Resilience mode of the Cloud Composer Environment.
+  enum ResilienceMode {
+    // Default mode doesn't change environment parameters.
+    RESILIENCE_MODE_UNSPECIFIED = 0;
+
+    // Enabled High Resilience mode, including Cloud SQL HA.
+    HIGH_RESILIENCE = 1;
+  }
+
   // Output only. The Kubernetes Engine cluster used to run this environment.
   string gke_cluster = 1 [(google.api.field_behavior) = OUTPUT_ONLY];
 
@@ -584,6 +746,12 @@ message EnvironmentConfig {
   // This field is supported for Cloud Composer environments in versions
   // composer-2.*.*-airflow-*.*.* and newer.
   RecoveryConfig recovery_config = 18 [(google.api.field_behavior) = OPTIONAL];
+
+  // Optional. Resilience mode of the Cloud Composer Environment.
+  //
+  // This field is supported for Cloud Composer environments in versions
+  // composer-2.2.0-airflow-*.*.* and newer.
+  ResilienceMode resilience_mode = 20 [(google.api.field_behavior) = OPTIONAL];
 }
 
 // Network-level access control policy for the Airflow web server.
diff --git a/google/cloud/orchestration/airflow/service/v1beta1/operations.proto b/google/cloud/orchestration/airflow/service/v1beta1/operations.proto
index 75663268a4eb0..6596658a0be3b 100644
--- a/google/cloud/orchestration/airflow/service/v1beta1/operations.proto
+++ b/google/cloud/orchestration/airflow/service/v1beta1/operations.proto
@@ -65,6 +65,10 @@ message OperationMetadata {
 
     // Loads snapshot of the resource operation.
     LOAD_SNAPSHOT = 6;
+
+    // Triggers failover of environment's Cloud SQL instance (only for highly
+    // resilient environments).
+    DATABASE_FAILOVER = 7;
   }
 
   // Output only. The current operation state.