fck-nat Features
High-availability Mode
fck-nat can operate on a single instance, or withing an autoscaling group for improved availability. When running in an autoscaling group, fck-nat can be configured to always attach a specific ENI at start-up, allowing fck-nat to maintain a consistent internal-facing IP address.
To enable this feature, you'll need to create a config file at /etc/fck-nat.conf like this:
Once the fck-nat configuration is created, be sure to restart the service by running service fck-nat restart.
In the official fck-nat CDK construct, we configure this via UserData on the autoscaling group.
Metrics
One of the objectives of fck-nat is to offer as close as possible metric parity with Managed NAT Gateway. If this feature is important to you, help us prioritize it by +1'ing the following issue: Report additional metrics from fck-nat