Comments (1)
It would be possible to run NAT Gateways in a single AZ, but this would not align with our best practices. If you only use the NAT gateway for OS, WP updates and installing plugins then a single-AZ solution might be fine and you could consider manually or automatically deploying the NAT gateway in another AZ in the event of a failure. If the WordPress site, plugins or code relies on having outbound internet access then you might need something highly available.
For smaller sites or deployments it may be cost effective to use a NAT instance with some scripting to manage either a HA pair of instances in 2 AZs or an auto scaling group with min=1, max=1 and a takeover script that updates route tables as an instances starts.
This might give you a good starting point;
https://aws.amazon.com/articles/high-availability-for-amazon-vpc-nat-instances-using-aws-cloudformation-templates/
from aws-refarch-wordpress.
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from aws-refarch-wordpress.