FSx for OpenZFS file systems should be configured for Multi-AZ deployment

How to fix it

• Replaces the resource: The deployment type is fixed at creation and a Single-AZ backup cannot restore as Multi-AZ, so create one, copy data by on-demand replication or rsync, repoint clients, then delete this one.

In the console

Amazon FSx → Create file system → FSx for OpenZFS → Standard create

Deployment type

Multi-AZ (HA)

Preferred subnet

A subnet in the Availability Zone where most clients run

Standby subnet

A subnet in a different Availability Zone from the preferred subnet

Select route tables

Every route table associated with the subnets your clients are in

With the AWS CLI

aws fsx create-file-system --file-system-type OPENZFS --storage-capacity <storage-gib> --subnet-ids <preferred-subnet-id> <standby-subnet-id> --open-zfs-configuration DeploymentType=MULTI_AZ_1,ThroughputCapacity=<throughput-mbps>,PreferredSubnetId=<preferred-subnet-id> --region <region>

With Terraform

resource "aws_fsx_openzfs_file_system" "this" {
  deployment_type     = "MULTI_AZ_1"
  subnet_ids          = [var.preferred_subnet_id, var.standby_subnet_id]
  preferred_subnet_id = var.preferred_subnet_id
  route_table_ids     = var.client_route_table_ids
  storage_capacity    = var.storage_capacity_gib
  throughput_capacity = var.throughput_capacity
}