Reduce public ip count #118
Description
AWS will be charging for public IPv4 addresses soon (https://aws.amazon.com/blogs/aws/new-aws-public-ipv4-address-charge-public-ip-insights/)
We currently use 6 IP addresses @ $0.005 per hour = ~$22 USD a month
Not mentioned in the article is LightSail, for we'll deal with that separately
Of these 6:
- 2x for ALB used for websockets, predictions and grafana
- We might be able to switch this load balancer to V6 only and add a cloudfront distribution for each host header - special care will have to happen with websockets. Otherwise we can probably set this all to not cache
- We will need to make sure users on v4 can access these endpoints via cloudfront
- 1x for Websocket main instance
- 1x for tawhiri
- 1x for grafana
- 1x for APRS gateway
The ECS services could likely switch to IPv6 using egress gateway. They don't permit direct traffic (or shouldn't anyway). The only tricky one is the APRS gateway, however I believe there is enough APRS-IS gateways that support IPv6 that this shouldn't be an issue.